424B5 1 form424b5.htm 424B5

Filed pursuant to Rule 424(b)(5)

Registration No. 333-291509

PRELIMINARY PROSPECTUS SUPPLEMENT

(To prospectus dated December 4, 2025)

9,756,100 Shares of Common Stock

TriSalus Life Sciences, Inc.

We are offering 9,756,100 shares of our common stock, par value $0.0001 per share (“Common Stock”), in this offering.

Our Common Stock is listed on The Nasdaq Global Market under the symbol “TLSI.” On February 18, 2026, the last reported sale price of our Common Stock on The Nasdaq Global Market was $4.64 per share.

We are a “smaller reporting company” under the federal securities laws and, as such, have elected to comply with certain reduced reporting requirements for this prospectus and may elect to do so in future filings.

Investing in our Common Stock involves a high degree of risk. See “Risk Factors” beginning on page S-4 of this prospectus supplement and in the documents incorporated by reference into this prospectus supplement before making your investment decision.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus supplement or the accompanying prospectus. Any representation to the contrary is a criminal offense.

	Per Share		Total
Public offering price	$	4.10	$	40,000,010
Underwriting discounts and commissions ⁽¹⁾	$	0.246	$	2,400,000
Proceeds to us, before expenses	$	3.854	$	37,600,010

(1)	See “Underwriting” beginning on page S-9 for additional disclosure regarding the compensation to be received by the underwriter.

We have granted a 30-day option to the underwriters to purchase up to 1,463,415 additional shares of Common Stock solely to cover over-allotments, if any.

The underwriters expect to deliver the shares to purchasers on or about February 23, 2026.

Sole Book-Runner

Lake Street

Prospectus supplement dated February 19, 2026

TABLE OF CONTENTS

Prospectus Supplement

ABOUT THIS PROSPECTUS SUPPLEMENT	S-ii
PROSPECTUS SUPPLEMENT SUMMARY	S-1
THE OFFERING	S-3
RISK FACTORS	S-4
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS	S-5
USE OF PROCEEDS	S-6
DILUTION	S-7
DESCRIPTION OF THE SECURITIES WE ARE OFFERING	S-8
UNDERWRITING	S-9
LEGAL MATTERS	S-11
EXPERTS	S-11
WHERE YOU CAN FIND MORE INFORMATION	S-11
INFORMATION INCORPORATED BY REFERENCE	S-12

Prospectus

ABOUT THIS PROSPECTUS	1
PROSPECTUS SUMMARY	2
RISK FACTORS	6
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS	6
USE OF PROCEEDS	7
DESCRIPTION OF CAPITAL STOCK	7
DESCRIPTION OF DEBT SECURITIES	12
DESCRIPTION OF WARRANTS	19
DESCRIPTION OF UNITS	21
LEGAL OWNERSHIP OF SECURITIES	22
PLAN OF DISTRIBUTION	25
LEGAL MATTERS	28
EXPERTS	28
WHERE YOU CAN FIND MORE INFORMATION	28
INCORPORATION OF DOCUMENTS BY REFERENCE	29

S-i

ABOUT THIS PROSPECTUS SUPPLEMENT

This prospectus supplement and the accompanying prospectus relate to an offering of our Common Stock. Before buying any shares of the Common Stock that we are offering, we urge you to carefully read this prospectus supplement and the accompanying prospectus, together with the information incorporated by reference as described under the headings “Where You Can Find More Information” and “Information Incorporated by Reference” in this prospectus supplement as well as any free writing prospectus we have provided for use in connection with this offering. These documents contain important information that you should consider when making your investment decision.

This document is in two parts. The first part is this prospectus supplement, which describes the terms of this offering of Common Stock and also adds to, updates and changes information contained in the accompanying prospectus and the documents incorporated by reference. The second part is the accompanying prospectus, which provides more general information, some of which may not apply to this offering. Generally, when we refer to this prospectus, we are referring to both parts of this document combined, together with the documents incorporated by reference herein and therein. To the extent the information contained in this prospectus supplement differs from or conflicts with the information contained in the accompanying prospectus or any document incorporated by reference having an earlier date, the information in this prospectus supplement will control. If any statement in one of these documents is inconsistent with a statement in another document having a later date—for example, a document incorporated by reference into this prospectus supplement and the accompanying prospectus—the statement in the document having the later date modifies or supersedes the earlier statement. We have not, and the underwriter has not, authorized anyone to provide you with information different from that which is contained in or incorporated by reference in this prospectus supplement, the accompanying prospectus and in any free writing prospectus that we may authorize for use in connection with this offering. Neither we, nor the underwriter, take any responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. When you make a decision about whether to invest in our securities, you should not rely upon any information other than the information in this prospectus supplement or the accompanying prospectus, including any free writing prospectus that we have authorized for use in connection with this offering.

You should assume that the information contained in this prospectus supplement is accurate as of the date on the front cover of this prospectus supplement only and that any information we have incorporated by reference or included in the accompanying prospectus is accurate only as of the date given in the document incorporated by reference or as of the date of the accompanying prospectus, as applicable, regardless of the time of delivery of this prospectus supplement, the accompanying prospectus, any related free writing prospectus, or any sale of our Common Stock. Our business, financial condition, results of operations and prospects may have changed since those dates. We further note that the representations, warranties and covenants made by us in any agreement that is filed as an exhibit to any document that is incorporated by reference into this prospectus supplement or the accompanying prospectus were made solely for the benefit of the parties to such agreement, including, in some cases, for the purpose of allocating risk among the parties to such agreements, and should not be deemed to be a representation, warranty or covenant to you. Moreover, such representations, warranties or covenants were accurate only as of the date when made. Accordingly, such representations, warranties and covenants should not be relied on as accurately representing the current state of our affairs.

This prospectus supplement and the accompanying prospectus contain summaries of certain provisions contained in some of the documents described herein, but reference is made to the actual documents for complete information. All of the summaries are qualified in their entirety by the actual documents. Copies of some of the documents referred to herein have been or will be filed as exhibits to the registration statement of which this prospectus is a part or as exhibits to documents incorporated by reference herein, and you may obtain copies of those documents as described below under the headings “Where You Can Find More Information” and “Information Incorporated by Reference.” We further note that the representations, warranties and covenants made by us in any agreement that is filed as an exhibit to any document that is incorporated by reference in the prospectus supplement and the accompanying base prospectus were made solely for the benefit of the parties to such agreement, including, in some cases, for the purpose of allocating risk among the parties to such agreements, and should not be deemed to be a representation, warranty or covenant to you. Moreover, such representations, warranties or covenants were accurate only as of the date when made. Accordingly, such representations, warranties and covenants should not be relied on as accurately representing the current state of our affairs.

This prospectus supplement and the accompanying prospectus do not constitute an offer to sell, or a solicitation of an offer to purchase, the securities offered by this prospectus supplement and the accompanying prospectus in any jurisdiction to or from any person to whom or from whom it is unlawful to make such offer or solicitation of an offer in such jurisdiction. Persons into whose possession this prospectus supplement and the accompanying prospectus come are advised to inform themselves about and to observe any restrictions relating to the offering and the distribution of this prospectus supplement and the accompanying prospectus.

This prospectus supplement and the accompanying prospectus incorporate by reference market data and industry statistics and forecasts that are based on independent industry publications and other publicly available information. Although we believe these sources are reliable, we do not guarantee the accuracy or completeness of this information and we have not independently verified this information. In addition, the market and industry data and forecasts that may be included or incorporated by reference in this prospectus supplement or the accompanying prospectus may involve estimates, assumptions and other risks and uncertainties and are subject to change based on various factors, including those discussed under the heading “Risk Factors” contained in this prospectus supplement, the accompanying prospectus and under similar headings in other documents that are incorporated by reference herein and therein and in any free writing prospectus we authorize for use in connection with this offering. Accordingly, investors should not place undue reliance on this information.

Solely for convenience, tradenames referred to in this prospectus supplement appear without the ® or TM symbols, but those references are not intended to indicate, in any way, that we will not assert, to the fullest extent under applicable law, our rights or that the applicable owner will not assert its rights, to these tradenames and trademarks. All trademarks, service marks and tradenames included or incorporated by reference in this prospectus supplement are the property of their respective owners.

Unless the context otherwise requires, references in this prospectus supplement to “TriSalus,” the “Company,” “we,” “us,” “our” and similar terms refer to TriSalus Life Sciences, Inc., a Delaware corporation, and its consolidated subsidiaries.

S-ii

PROSPECTUS SUPPLEMENT SUMMARY

This summary highlights certain information about us and this offering and selected information contained elsewhere in or incorporated by reference into this prospectus supplement and the accompanying prospectus. This summary is not complete and does not contain all of the information that you should consider before deciding whether to invest in our Common Stock. For a more complete understanding of our Company and this offering, we encourage you to read and consider carefully the more detailed information in this prospectus supplement and the accompanying prospectus, including the information incorporated by reference into this prospectus supplement and the accompanying prospectus, and the information included in any free writing prospectus that we authorize for use in connection with this offering, including the information contained in and incorporated by reference under the heading “Risk Factors” on page S-4 of this prospectus supplement, and under similar headings in the other documents that are filed after the date hereof and incorporated by reference into this prospectus supplement and the accompanying prospectus.

Overview

We are a growing, oncology focused medical technology business seeking to transform outcomes for patients with solid tumors by integrating our innovative delivery technology with standard-of-care therapies, and with our investigational immunotherapeutic, nelitolimod, a class C Toll-like receptor 9 (“TLR9”) agonist, for a range of different therapeutic and technology applications. Our ultimate goal is to transform the treatment paradigm for patients battling solid tumors. We have developed an innovative technology designed to overcome two significant challenges that prevent optimal delivery and performance of therapeutics in these difficult-to-treat diseases: (i) high intratumoral pressure caused by tumor growth and collapsed vasculature restricting the delivery of oncology therapeutics and (ii) off target delivery. Nelitolimod, specifically, combined with our technology, aims to address the immunosuppressive properties of immune cells in the tumor and tumor microenvironment of the liver, pancreas and other solid tumors. By systematically addressing these barriers, we aim to improve response to therapies and to enable improved patient outcomes.

We market our cutting-edge PEDD infusion systems, which optimize delivery of embolics and therapeutics for the treatment of various solid tumors. Additionally, we have conducted Phase I clinical trials of nelitolimod to study the ability of an immunotherapeutic when administered via PEDD in combination with systemic treatment can enhance the effectiveness of other therapeutics and ultimately lead to better patient responses. Once final data is assembled, we plan to pursue a pharmaceutical partner for future development. We believe the combination of our PEDD technology with nelitolimod has the potential to solve two main barriers in the tumor microenvironment that inhibits the success of immunotherapy. The first barrier (mechanical) is comprised of high intratumoral pressure within tumors that limits drug uptake and the second barrier (biological) is the reversal of intratumoral immunosuppression.

In 2020, we launched TriNav, our therapeutic and embolic delivery device with SmartValve technology for our proprietary PEDD approach. Current sales consist of the TriNav Infusion System. In 2020, we gained transitional pass-through payments (“TPT”) approval from the Centers for Medicare & Medicaid Services (“CMS”), which allows hospitals to cover the cost of using TriNav. The approval began in January 2020 and expired at the end of 2023. On December 14, 2023, CMS created a permanent New Technology Healthcare Common Procedure Coding System (“HCPCS”) code for procedures involving the TriNav Infusion System. This code became effective on January 1, 2024 and may be reported by hospital outpatient departments (HOPDs) and ambulatory surgical centers (ASCs) for the Company to obtain reimbursement for TriNav device. Effective April 1, 2025, TriNav received a second unique and permanent HCPCS code from CMS. This new code provides reimbursement clarity for mapping procedures conducted prior to transarterial radioembolization (“TARE”).

In 2024, we expanded our portfolio of PEDD devices with the launch of the TriNav LV Infusion System and TriGuide Guiding Catheter to optimize therapeutic delivery for patients with larger vessels. The TriNav LV is targeted for patients with vessels sized between 3.5mm and 5.0mm, which is expected to provide a full range of PEDD devices for all vessel sizes and allow us to expand our addressable liver embolization market. The TriGuide Guiding Catheter has a larger inner diameter, lubricious inner lining and reverse curve design to support femoral access for the TriNav LV, which we believe will enhance procedural efficiency. In June 2025, we launched an additional PEDD device, TriNav FLX, designed with a more flexible distal tip to facilitate navigation through tortuous anatomy. These new products are eligible for the same HCPCS reimbursement codes as existing TriNav products, enabling seamless integration into current billing structures.

S-1

We also initiated a registry study called PROTECT (Pressure Enabled Retrograde Occlusive Therapy with Embolization for Control of Thyroid Disease) and intend to enroll 100 patients across ten leading academic sites. It is estimated that approximately 5% of adults have multinodular goiters. We estimate that this could expand the addressable market by approximately 50,000 procedures, which represents an incremental $400 million market opportunity. This new procedure utilizing the TriNav system is also eligible for the same Healthcare Common Procedure Coding System (HCPCS) reimbursement code allowing for seamless integration into current billing approaches.

	●	Uveal melanoma with liver metastases (PERIO-01, NCT04935229);

	●	ICC and HCC (PERIO-02, NCT05220722); and

	●	Locally advanced pancreatic carcinoma (PERIO-03, NCT05607953).

Results of our three Phase 1 nelitolimod studies will be available in 2026 and we will begin discussions for a pharmaceutical partner for further clinical development in the most promising indication(s). Investigation for HCC is continuing through an IIT.

Preliminary Unaudited Financial Results

We anticipate fourth quarter 2025 revenues of approximately $13.2 million and full-year 2025 revenues of approximately $45.2 million. As of December 31, 2025, we estimate cash and cash equivalents were approximately $20.4 million.

The preliminary financial results set forth above are unaudited, are based on management’s initial review of our results as of and for the year ended December 31, 2025, and are subject to revisions based upon our year-end closing procedures and the completion of the external audit of our year-end financial statements. Actual results may differ materially from these preliminary unaudited results as a result of the completion of year-end closing procedures, final adjustments and other developments arising between now and the time that our financial results are finalized. In addition, these preliminary unaudited results are not a comprehensive statement of our financial results for the year ended December 31, 2025, should not be viewed as a substitute for full, audited financial statements, prepared in accordance with generally accepted accounting principles, and are not necessarily indicative of our results for any future period. Accordingly, investors are cautioned not to place undue reliance on these preliminary unaudited results.

Implications of Being a Smaller Reporting Company

We are a smaller reporting company as defined in the Securities Exchange Act of 1934, as amended (the “Exchange Act”). We may take advantage of certain of the scaled disclosures available to smaller reporting companies and will be able to take advantage of these scaled disclosures for so long as (i) the market value of our Common Stock held by non-affiliates is less than $250 million measured on the last business day of our second fiscal quarter, or (ii) our annual revenue is less than $100 million during the most recently completed fiscal year and the market value of Common Stock held by non-affiliates is less than $700 million measured on the last business day of our second fiscal quarter.

Corporate Information

We were incorporated in Delaware in September 2020. Our principal executive offices are located at 6272 W. 91st Ave., Westminster, Colorado 80031 and our telephone number is (888) 321-5212. Our corporate website address is www.trisaluslifesci.com. Information contained on or accessible through our website is not a part of this prospectus, and the inclusion of our website address in this prospectus is an inactive textual reference only.

We and our subsidiaries own or have rights to trademarks, trade names and service marks that they use in connection with the operation of their business. Other trademarks, trade names and service marks appearing in this prospectus are the property of their respective owners. Solely for convenience, in some cases, the trademarks, trade names and service marks referred to in this prospectus are listed without the applicable ®, ™ and SM symbols.

S-2

THE OFFERING

Common Stock offered by us		9,756,100 shares of our Common Stock.


Common Stock to be outstanding immediately following the offering		59,811,590 shares of Common Stock (or 61,275,005 shares if the underwriter exercises its over-allotment option in full).

Underwriter’s over-allotment option		We have granted the underwriters a 30-day option to purchase up to 1,463,415 additional shares of Common Stock from us at the public offering price, less underwriting discounts and commissions.

Use of Proceeds		We estimate that our net proceeds from this offering will be approximately $37.0 million (or approximately $42.64 million if the underwriter exercises its over-allotment option in full), after deducting the underwriting discounts and commissions and the estimated offering expenses payable by us. We currently intend to use the net proceeds from this offering, excluding any proceeds that may be received upon the cash exercise of the Underwriter Warrants, for general corporate purposes which may include capital expenditures, working capital and general and administrative expenses. See “Use of Proceeds” on page S-6 of this prospectus supplement.

Risk Factors		Investing in our Common Stock involves a high degree of risk. See the information contained in or incorporated by reference under the heading “Risk Factors” on page S-4 of this prospectus supplement, in the accompanying prospectus and in the documents incorporated by reference into this prospectus supplement.

Nasdaq Global Market symbol		Our Common Stock is currently listed on the Nasdaq Global Market under the symbol “TLSI”.

The number of shares of our Common Stock to be outstanding after this offering is based on 50,055,490 shares of Common Stock outstanding as of January 31, 2026, and excludes, as of that date, the following:

	●	7,633,348 shares of Common Stock issuable upon exercise of outstanding stock options with a weighted average exercise price of $5.96 per share;
	●	7,402,541 shares of Common Stock issuable upon exercise of outstanding stock warrants with a weighted average exercise price of $11.38 per share;
	●	1,813,142 shares of Common Stock issuable upon vesting of outstanding restricted stock units (“RSUs”); and
	●	1,677,087 shares of Common Stock available for future grant under our 2023 Equity Incentive Plan.

Except as otherwise indicated, all information in this prospectus supplement reflects and assumes the following:

	●	no issuance, exercise or settlement of stock-based awards under our equity incentive plans; and
	●	no exercise by the underwriter of its option to purchase up to 1,463,415 additional shares of Common Stock in this offering.

S-3

RISK FACTORS

Investing in our Common Stock involves a high degree of risk. You should carefully review the risks and uncertainties described below and discussed under the caption “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024 and our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2025, June 30, 2025 and September 30, 2025 which may be amended, supplemented or superseded from time to time by other reports we file with the SEC in the future, before deciding whether to purchase any Common Stock in this offering. Each of the risk factors could adversely affect our business, operating results, financial condition and prospects, as well as adversely affect the value of an investment in our Common Stock, and the occurrence of any of these risks might cause you to lose all or part of your investment. Additional risks not presently known to us or that we currently believe are immaterial may also significantly impair our business operations.

Risks Related to This Offering and Our Common Stock

As an investor, you may lose some or all of your investment.

Investing in our Common Stock involves a high degree of risk. As an investor, you may never recoup all, or even part, of your investment and you may never realize any return on your investment. You must be prepared to lose all of your investment.

Our management might apply the net proceeds from this offering in ways with which you do not agree and in ways that may impair the value of your investment.

Because we have not designated the amount of net proceeds from this offering to be used for any particular purpose, our management will have broad discretion as to the application of the net proceeds from this offering and could use them for purposes other than those contemplated at the time of the offering. You will be relying on the judgment of our management with regard to the use of these net proceeds, and you will not have the opportunity, as part of your investment decision, to assess whether the net proceeds are being used appropriately. Our management might apply these proceeds in ways with which you do not agree, or in ways that do not improve our financial condition or market value, which could compromise our ability to pursue our growth strategy and adversely affect the market price of our Common Stock.

You may experience immediate and substantial dilution.

Based on the public offering price and the net tangible book value per share as of September 30, 2025, because the public offering price per share in this offering is substantially higher than the historical net tangible book value per share, you will suffer immediate dilution of $3.93 per share in net tangible book value of the Common Stock. The exercise of outstanding stock options and warrants, the vesting and settlement of outstanding RSUs, may result in further dilution of your investment. See the section titled “Dilution” in this prospectus supplement for a more detailed illustration of the dilution you would incur if you purchase shares in this offering.

Our stock price has been and may be volatile in the future, and as a result, investors in our securities could incur substantial losses.

There can be no guarantee that our stock price will remain at current prices or that future sales of our Common Stock will not be at prices lower than those sold to investors. We may incur rapid and substantial increases or decreases in our stock price in the foreseeable future attributable to various factors including those discussed in the “Risk Factors” section in this prospectus supplement, the accompanying prospectus, the documents incorporated by reference herein and therein and in any free writing prospectus we authorize for use in connection with this offering. Some factors may be unrelated to our operating performance or prospects or may be beyond our control. The price for our Common Stock may be influenced by many factors, including investor reaction to our business strategy; the success of our services, products, or technologies; compliance with Nasdaq listing standards; variations in our financial results; any major change in our board or management; or our involvement in regulatory investigations or litigation. In addition, if one or more analysts covering our business downgrade their evaluations of our Common Stock or the stock of other companies in our industry, the price of our Common Stock could decline. If one or more analysts cease to cover our Common Stock, we could lose visibility in the market for our Common Stock, which in turn could cause our stock price to decline.

Since our stock price may continue to be volatile in the future, investors in our Common Stock could incur substantial losses. In the past, following periods of volatility in the market, securities class-action litigation has often been instituted against companies. Securities litigation and stockholder activism, including potential proxy contests, could result in substantial costs and divert management’s and our board of directors’ attention and resources from our business. Such securities litigation and stockholder activism could give rise to perceived uncertainties as to our future, adversely affect our relationships with service providers and make it more difficult to attract and retain qualified personnel. We may be required to incur significant legal fees and other expenses related to any securities litigation and activist stockholder matters. Further, our stock price could be subject to significant fluctuation or otherwise be adversely affected by the events, risks and uncertainties of any securities litigation and stockholder activism.

Future sales of our Common Stock, or the perception that such future sales may occur, may cause our stock price to decline.

Sales of a substantial number of shares of our Common Stock in the public market, or the perception that these sales could occur, following this offering could cause the market price of our Common Stock to decline and impair our ability to raise capital through the sale of additional equity securities.

We do not expect to pay dividends in the foreseeable future. As a result, you must rely on stock appreciation for any return on your investment.

We do not anticipate paying cash dividends on our Common Stock in the foreseeable future. Any payment of cash dividends will depend on our financial condition, results of operations, capital requirements and other factors and will be at the discretion of our board of directors. Accordingly, you will have to rely on capital appreciation, if any, to earn a return on your investment in our Common Stock.

S-4

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus supplement, the accompanying prospectus and the documents we have filed with the SEC that are incorporated by reference herein and therein contain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). These forward-looking statements include statements related to our anticipated financial performance, business prospects and strategy; anticipated trends and prospects in the various industries in which our businesses operate; new products, services and related strategies; and other similar matters. These forward-looking statements can be identified by the use of terminology such as “anticipate,” “believe,” “estimate,” “expect,” “intend,” “project,” “will,” or the negative thereof or other variations thereon or comparable terminology. Because forward-looking statements relate to matters that have not yet occurred, these statements are inherently subject to risks and uncertainties that could cause our actual results to differ materially from any future results expressed or implied by the forward-looking statements. Factors currently known to management that could cause actual results to differ materially from those in forward-looking statements include those factors listed in the “Risk Factors” section in this prospectus supplement, the accompanying prospectus, the documents incorporated by reference herein and therein and in any free writing prospectus we authorize for use in connection with this offering.

We caution you that these forward-looking statements are subject to numerous risks and uncertainties, most of which are difficult to predict and many of which are beyond our control. Some factors that could cause actual results to differ include:

	●	our ability to raise financing in the future;

	●	our ability to service our indebtedness and to access additional delayed draws that may in the future become available to us;

	●	changes in applicable laws or regulations;

	●	our ability to retain or recruit, or changes required in, our officers, key employees or directors;

	●	our ability to successfully commercialize any product candidates that we successfully develop and that are approved by applicable regulatory authorities;

	●	our expectations for the timing and results of data from clinical trials and regulatory approval applications;

	●	our estimates regarding expenses, future revenue, capital requirements and needs for additional financing;

	●	our business, operations and financial performance including:

	Ø	our history of operating losses and expectations of significant expenses and continuing losses for the foreseeable future;

	Ø	our ability to execute our business strategy, including the growth potential of the markets for our products and our ability to serve those markets;

	Ø	our ability to grow market share in our existing markets or any new markets we may enter;

	Ø	our ability to develop and maintain our brand and reputation;

	Ø	our ability to partner with other companies;

	Ø	the size of the addressable markets for our product candidates;

	Ø	our expectations regarding our ability to obtain and maintain intellectual property protection and not infringe on the rights of others;

	Ø	our ability to manage our growth effectively;

	Ø	our ability to maintain the listing of our securities in the Nasdaq Global Market, and the potential liquidity and trading of such securities;

	Ø	the outcome of any legal proceedings that may be instituted against us; and

	Ø	unfavorable conditions in our industry, the global economy or global supply chain, including financial and credit market fluctuations, international trade relations, pandemics, political turmoil, natural catastrophes, warfare and terrorist attacks.

Given these risks, uncertainties and other factors, many of which are beyond our control, we cannot assure you that the forward-looking statements in this prospectus supplement, or incorporated by reference herein, will prove to be accurate, and you should not place undue reliance on these forward-looking statements. Furthermore, if our forward-looking statements prove to be inaccurate, the inaccuracy may be material. In light of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame, or at all. Except as required by law, we do not undertake any obligation to update forward-looking statements to reflect events or developments occurring after the date of this prospectus supplement, even if new information becomes available in the future.

Other unknown or unpredictable factors that could also adversely affect our business, financial condition and results of operations may arise from time to time. In light of these risks and uncertainties, the forward-looking statements discussed in this prospectus supplement, the accompanying prospectus, the documents incorporated by reference herein and therein and in any free writing prospectus we authorize for use in connection with this offering may not prove to be accurate and, accordingly, you should not place undue reliance on these forward-looking statements, which only reflect the views of our management as of the date hereof or thereof (as applicable).

S-5

USE OF PROCEEDS

We estimate that the net proceeds from this offering will be $37.0 million, or $42.64 million if the underwriter exercises its over-allotment option in full, in each case after deducting the underwriting discounts and commissions and estimated offering expenses payable by us.

We intend to use the net proceeds from this offering for general corporate purposes which may include capital expenditures, working capital and general and administrative expenses.

Our expected use of net proceeds from the sale of shares of Common Stock in this offering represents our intentions based upon our present plans and business conditions, which could change in the future as our plans and business conditions evolve. The amount and timing of our actual expenditures will depend upon numerous factors, including the results of our operations and the factors described under “Risk Factors” located elsewhere in this prospectus supplement, the accompanying base prospectus and in the information incorporated by reference herein or therein. We have not determined the amount of net proceeds to be used specifically for such purposes and, as a result, management will retain broad discretion over the allocation of net proceeds and investors will be relying on our judgment regarding the application of the net proceeds from this offering.

S-6

DILUTION

Our net tangible book value on September 30, 2025 was approximately $(26,724,961) or approximately $(0.54) per share of Common Stock. Net tangible book value per common share is determined by dividing our net tangible book value, which consists of tangible assets less total liabilities, by the number of shares of Common Stock outstanding on that date. If you purchase shares in this offering, your ownership interest will be diluted immediately to the extent of the difference between the price you pay per share of Common Stock in this offering and the as adjusted net tangible book value per share of Common Stock after this offering.

After giving effect to the sale of shares of Common Stock in this offering at a public offering price of $4.10 per share, and after deducting estimated offering commissions and offering expenses payable by us, our as adjusted net tangible book value as of September 30, 2025, would have been approximately $10,275,000, or $0.17 per share. This represents an immediate increase in the net tangible book value of $0.62 per share to existing shareholders and an immediate dilution of $3.93 per share to investors purchasing our shares in this offering.

The following table illustrates this per share dilution assuming the underwriters do not exercise their option to purchase additional shares of Common Stock:

Public offering price per share of Common Stock				$	4.10
Net tangible book value per share as of September 30, 2025	$	(0.54	)
Increase in net tangible book value per share attributable to this offering	$	0.71
As adjusted net tangible book value per share as of September 30, 2025, after giving effect to this offering				$	0.17
Dilution per share to investors participating in this offering				$	3.93

The information above assumes that the underwriters do not exercise their option to purchase additional shares. If the underwriters exercise their option in full to purchase additional shares of Common Stock in this offering at the public offering price of $4.10 per share, after deducting underwriting discounts and commissions and estimated offering expenses payable by us, the as adjusted net tangible book value per share after this offering would be $0.26 per share, the increase in the as adjusted net tangible book value per share to existing stockholders would be $0.80 per share and the dilution to investors participating in this offering would be $3.30 per share.

The above discussion and table are based on 49,891,299 shares of our Common Stock outstanding as of September 30, 2025, and excludes, as of that date, the following:

	●	6,452,581 shares of Common Stock issuable upon exercise of outstanding stock options with a weighted average exercise price of $5.99 per share;

	●	7,402,541 shares of Common Stock issuable upon exercise of outstanding stock warrants with a weighted average exercise price of $11.38 per share;

	●	797,669 shares of Common Stock issuable upon vesting of outstanding RSUs; and

	●	3,935,868 shares of Common Stock available for future grant under our 2023 Equity Incentive Plan.

To the extent that outstanding options or warrants are exercised, or we issue shares of Common Stock in connection with our outstanding RSUs or we issue additional shares of Common Stock or Common Stock equivalents in the future, including in connection with other capital raising transactions, investors purchasing our shares in this offering may experience further dilution.

S-7

DESCRIPTION OF THE SECURITIES WE ARE OFFERING

We are offering shares of our Common Stock. The Common Stock offered by this prospectus supplement and the accompanying prospectus is described in the accompanying prospectus under the heading “Description of Capital Stock.”

S-8

UNDERWRITING

We have entered into an underwriting agreement with Lake Street Capital Markets, LLC (“Lake Street”), as representative of the underwriters named below, pursuant to which, subject to certain terms and conditions therein, each of the underwriters named below has severally agreed to purchase, and we have agreed to sell, the number of securities set forth opposite the name of such underwriter:

Underwriters	Number of Shares of Common Stock
Lake Street Capital Markets, LLC		9,756,100

Total		9,756,100

This offering is being conducted on a firm commitment basis. The underwriters are obligated to take and pay for all the securities offered by this prospectus if any such securities are taken.

Discounts, Commissions and Expenses

The underwriters propose to offer the securities purchased pursuant to the underwriting agreement to the public at the public offering price set forth on the cover page of this prospectus and to certain dealers at that price less a concession not in excess of $0.14760 per share of Common Stock. After this offering, the public offering price and concession may be changed by the underwriters. No such change will change the amount of proceeds to be received by us as set forth on the cover page of this prospectus.

In connection with the sale of securities to be purchased by the underwriters, the underwriters will be deemed to have received compensation in the form of underwriting discounts. The underwriters’ discount will be 6.0% of the gross proceeds of this offering.

We estimate that the total expenses of this offering, excluding the underwriting discounts and commissions, will be approximately $600,000 and are payable by us. We have also agreed to reimburse the underwriters for certain of their expenses in an amount up to $125,000, which reimbursement is included in the total estimated expenses of this offering.

The following table shows the underwriting discounts and commissions payable to the underwriters by us in connection with this offering:

	Per Share		Total
Public offering price	$	4.10	$	40,000,010
Underwriting discounts and commissions	$	0.246	$	2,400,000
Proceeds to us, before expenses	$	3.854	$	37,600,010

Indemnification

Pursuant to the underwriting agreement, we have agreed to indemnify the underwriters against certain liabilities, including liabilities under the Securities Act, or to contribute to payments that the underwriters or such other indemnified parties may be required to make in respect of those liabilities.

S-9

Lock-Up Agreements

We have agreed not to, subject to certain exceptions, offer, sell, assign, transfer, pledge, contract to sell, establish an open put equivalent position, or otherwise dispose of, or announce the offering of, or submit or file any registration statement with the SEC in respect of, any of our Common Stock, options, rights or warrants to acquire our Common Stock or securities exchangeable or exercisable for or convertible into our Common Stock or publicly announce any intention to do any of the foregoing, without the prior written consent of the representative for a period of ninety (90) days following the date of this prospectus (the “Lock-Up Period”). This consent may be given at any time. These restrictions on future issuances are subject to exceptions for (i) issuance by us of the securities to be sold in this offering; (ii) issuance by us of Common Stock and options to purchase Common Stock, shares of Common Stock underlying options granted and other securities, each pursuant to any director or employee stock option plan, stock ownership plan or dividend reinvestment plan of our company in effect on the date hereof and described in this prospectus or the documents incorporated by reference herein; (iii) issuance by us of Common Stock pursuant to the conversion of securities or the exercise of warrants, which securities or warrants are outstanding on the date hereof and described in this prospectus or the documents incorporated by reference herein; and (iv) adoption by us of a new equity incentive plan, the filing by us of a registration statement on Form S-8 to register the offer and sale of securities to be issued pursuant to such new equity incentive plan, and the issuance by us securities pursuant to such new equity incentive plan.

In addition, our directors and executive officers have entered into lock-up agreements with the underwriters. Under these agreements, these individuals have agreed, subject to certain specified exceptions, not to sell or transfer any shares of Common Stock or securities convertible into or exchangeable or exercisable for our shares of Common Stock during the for a period of 90 days following the date of this prospectus, without first obtaining the written consent of Lake Street.

Electronic Distribution

This prospectus may be made available in electronic format on websites or through other online services maintained by the underwriters or by their affiliates. In those cases, prospective investors may view offering terms online and prospective investors may be allowed to place orders online. Other than this prospectus in electronic format, the information on the underwriters’ website or our website and any information contained in any other websites maintained by the underwriters or by us is not part of this prospectus or the registration statement of which this prospectus forms a part, has not been approved or endorsed by us or the underwriters in their capacity as underwriters, and should not be relied upon by investors.

Discretionary Accounts

The underwriters do not intend to confirm sales of the securities to any accounts over which they have discretionary authority.

Other Relationships

The underwriters and their affiliates may in the future provide various investment banking and other financial services for us and our affiliates for which they may in the future receive customary fees.

Offer Restrictions Outside the United States

Other than in the United States, no action has been taken by us or the underwriters that would permit a public offering of the securities offered by this prospectus in any jurisdiction where action for that purpose is required. The securities offered by this prospectus may not be offered or sold, directly or indirectly, nor may this prospectus or any other offering material or advertisements in connection with the offer and sale of any such securities be distributed or published in any jurisdiction, except under circumstances that will result in compliance with the applicable rules and regulations of that jurisdiction. Persons into whose possession this prospectus comes are advised to inform themselves about and to observe any restrictions relating to this offering and the distribution of this prospectus. This prospectus does not constitute an offer to sell or a solicitation of an offer to buy any securities offered by this prospectus in any jurisdiction in which such an offer or a solicitation is unlawful.

S-10

LEGAL MATTERS

The validity of the shares of Common Stock offered by this prospectus supplement will be passed upon by Sheppard, Mullin, Richter, & Hampton, LLP, New York, New York. Certain legal matters in connection with this offering will be passed upon for the underwriter by Sullivan & Worcester LLP, New York, New York.

EXPERTS

The consolidated financial statements of TriSalus Life Sciences, Inc. as of December 31, 2024, and for the year then ended, incorporated by reference in this prospectus supplement and elsewhere in the registration statement, have been so incorporated by reference in reliance upon the report of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in accounting and auditing.

The consolidated financial statements of the Company appearing in the Company’s Annual Report on Form 10-K for the year ended as of December 31, 2023, include the effects of the adjustment to retrospectively apply the change in accounting as described in Note 2 to the consolidated financial statements. KPMG LLP, an independent registered public accounting firm, audited the consolidated financial statements as of December 31, 2023, and for the year then ended, before the effects of the retrospective adjustment, which financial statements are not included (incorporated by reference) herein. Grant Thornton LLP, an independent registered public accounting firm, audited the retrospective adoption. The consolidated financial statement of TriSalus Life Sciences, Inc. as of December 31, 2023, and for the year then ended, have been incorporated by reference herein in reliance upon the report of (1) KPMG LLP, solely with respect to the financial statements before the effects of the retrospective adjustment, and (2) Grant Thornton LLP, solely with respect to the retrospective adjustment, incorporate by reference herein, and upon the authority of said firms as experts in accounting and auditing.

TriSalus Life Sciences, Inc. has agreed to indemnify and hold KPMG LLP (KPMG) harmless against and from any and all legal costs and expenses incurred by KPMG in successful defense of any legal action or proceeding that arises as a result of KPMG’s consent to the inclusion (or incorporation by reference) of its audit report on the Company’s past financial statements included (or incorporated by reference) in this registration statement.

WHERE YOU CAN FIND MORE INFORMATION

We have filed with the SEC a registration statement on Form S-3 under the Securities Act, with respect to the shares of Common Stock we are offering under this prospectus supplement. This prospectus supplement and the accompanying prospectus do not contain all of the information set forth in the registration statement and the exhibits to the registration statement. For further information with respect to us and the securities we are offering under this prospectus supplement, we refer you to the registration statement and the exhibits and schedules filed as a part of the registration statement. Whenever a reference is made in this prospectus supplement to any of our contracts, agreements or other documents, the reference may not be complete and you should refer to the exhibits that are a part of the registration statement or the exhibits to the reports or other documents incorporated herein by reference for a copy of such contract, agreement or other document.

We are subject to the reporting requirements of the Exchange Act and file annual, quarterly and current reports, proxy statements and other information with the SEC. You can read our SEC filings, including the registration statement, over the internet at the SEC’s website at http://www.sec.gov. We also maintain a website at www.trisaluslifesci.com, at which you may access these materials free of charge as soon as reasonably practicable after they are electronically filed with, or furnished to, the SEC. The information contained in, or that can be accessed through, our website is not part of this prospectus.

S-11

INFORMATION INCORPORATED BY REFERENCE

The SEC allows us to “incorporate by reference” information from other documents that we file with it, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be part of this prospectus supplement. Information in this prospectus supplement supersedes information incorporated by reference that we filed with the SEC prior to the date of this prospectus supplement, while information that we file later with the SEC will automatically update and supersede the information in this prospectus supplement. We incorporate by reference into this prospectus supplement the information or documents listed below that we have filed with the SEC:

	●	our Annual Report on Form 10-K for the year ended December 31, 2024, filed with the SEC on April 15, 2025, as amended by the Form 10-K/A filed with the SEC on May 30, 2025;

	●	our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2025, June 30, 2025 and September 30, 2025, filed with the SEC on May 15, 2025, August 12, 2025 and November 13, 2025, respectively;

	●	the information specifically incorporated by reference into our Annual Report on Form 10-K, as amended, for the fiscal year ended December 31, 2024 from our definitive proxy statement on Schedule 14A (other than information furnished rather than filed) filed with the SEC on April 30, 2025;

	●	our Current Reports on Form 8-K filed with the SEC on January 8, 2025, January 31, 2025, February 19, 2025, February 25, 2025, April 17, 2025, April 23, 2025, April 30, 2025, May 30, 2025, June 16, 2025, June 23, 2025, July 24, 2025, August 29, 2025, October 1, 2025, February 9, 2026 and February 20, 2026 (other than the portions thereof which are furnished and not filed); and

	●	the description of our securities contained in Exhibit 4.7 to our Annual Report on Form 10-K, as amended, for the fiscal year ended December 31, 2024, filed with the SEC on April 15, 2025, as amended on May 30, 2025.

We also incorporate by reference into this prospectus supplement all documents (other than current reports furnished under Item 2.02 or Item 7.01 of Form 8-K and exhibits filed on such form that are related to such items) that are filed by us with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act including those made after the date of this prospectus supplement, until we file a post-effective amendment to the applicable registration statement that indicates the termination of the offering of the securities made by this prospectus supplement and will become a part of this prospectus supplement from the date that such documents are filed with the SEC. These documents include periodic reports, such as Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, as well as proxy statements.

This prospectus supplement as further supplemented may contain information that updates, modifies or is contrary to information in one or more of the documents incorporated by reference in this prospectus supplement. You should rely only on the information incorporated by reference or provided in this prospectus supplement. We have not authorized anyone else to provide you with different information. You should not assume that the information in this prospectus supplement is accurate as of any date other than the date of this prospectus supplement or the date of the documents incorporated by reference in this prospectus supplement, respectively.

We will provide, without charge, to each person, including any beneficial owner, to whom this prospectus supplement is delivered, upon written or oral request, a copy of any or all documents that are incorporated by reference into this prospectus supplement, but not delivered with the prospectus supplement, other than exhibits to such documents unless such exhibits are specifically incorporated by reference into the documents that this prospectus supplement incorporates. You should direct written requests to:

Trisalus Life Sciences, Inc.

6272 W, 91st Ave.

Westminster, Colorado 80021

(888) 321-5212

You may also access the documents incorporated by reference in this prospectus supplement on the SEC’s website at www.sec.gov or through our website at www.trisaluslifesci.com. The reference to our website is an inactive textual reference only and, except for the specific incorporated documents listed above, the information contained in or accessible through our website does not constitute a part of this prospectus supplement and is not incorporated by reference into this prospectus supplement.

Any statement contained in this prospectus supplement or in a document incorporated or deemed to be incorporated by reference into this prospectus supplement will be deemed to be modified or superseded for purposes of this prospectus supplement to the extent that a statement contained in this prospectus supplement or any other subsequently filed document that is deemed to be incorporated by reference into this prospectus supplement modifies or supersedes the statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a part of this prospectus supplement.

S-12

TriSalus Life Sciences, Inc.

$150,000,000

Common Stock

Preferred Stock

Debt Securities

Warrants

Units

We may offer and sell, from time to time in one or more offerings, any combination of common stock, $0.0001 par value (“Common Stock”), preferred stock, debt securities, warrants to purchase Common Stock, preferred stock or debt securities, or any combination of the foregoing, either individually or as units comprised of one or more of the other securities, having an aggregate initial offering price not exceeding $150 million.

This prospectus provides a general description of the securities we may offer. Each time we sell a particular class or series of securities, we will provide specific terms of the securities offered in a supplement to this prospectus. The prospectus supplement and any related free writing prospectus may also add, update or change information contained in this prospectus. We may also authorize one or more free writing prospectuses to be provided to you in connection with these offerings. You should read carefully this prospectus, the applicable prospectus supplement and any related free writing prospectus, as well as any documents incorporated by reference herein or therein before you invest in any of our securities.

The specific terms of any securities to be offered, and the specific manner in which they may be offered, will be described in one or more supplements to this prospectus. This prospectus may not be used to consummate sales of any of these securities unless it is accompanied by a prospectus supplement. Before investing, you should carefully read this prospectus and any related prospectus supplement.

Our Common Stock is listed on The Nasdaq Global Market (“Nasdaq”) under the symbol “TLSI”. On November 10, 2025, the closing price of our Common Stock on Nasdaq was $4.00 per share. The applicable prospectus supplement will contain information, where applicable, as to any other listing on Nasdaq or any securities market or other exchange of the securities, if any, covered by the prospectus supplement. Prospective purchasers of our securities are urged to obtain current information as to the market prices of our securities, where applicable.

These securities may be sold directly by us, through dealers or agents designated from time to time, to or through underwriters, dealers, or through a combination of these methods on a continuous or delayed basis. See “Plan of Distribution” in this prospectus. We may also describe the plan of distribution for any particular offering of our securities in a prospectus supplement. If any agents, underwriters or dealers are involved in the sale of any securities in respect of which this prospectus is being delivered, we will disclose their names and the nature of our arrangements with them in a prospectus supplement. The price to the public of such securities and the net proceeds we expect to receive from any such sale will also be included in a prospectus supplement.

We are an “emerging growth company” under U.S. federal securities laws and, as such, are subject to reduced public company reporting requirements.

Investing in our securities involves a high degree of risk. You should review carefully the risks and uncertainties referenced under the heading “Risk Factors” contained in this prospectus beginning on page 6 and under similar headings in the other documents that are incorporated by reference into this prospectus. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is December 5, 2025

TABLE OF CONTENTS

ABOUT THIS PROSPECTUS	1
PROSPECTUS SUMMARY	2
RISK FACTORS	6
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS	6
USE OF PROCEEDS	7
DESCRIPTION OF CAPITAL STOCK	7
DESCRIPTION OF DEBT SECURITIES	12
DESCRIPTION OF WARRANTS	19
DESCRIPTION OF UNITS	21
LEGAL OWNERSHIP OF SECURITIES	22
PLAN OF DISTRIBUTION	25
LEGAL MATTERS	28
EXPERTS	28
WHERE YOU CAN FIND MORE INFORMATION	28
INCORPORATION OF DOCUMENTS BY REFERENCE	29

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that we filed with the U.S. Securities and Exchange Commission (“SEC”) using a “shelf” registration process. Under this shelf registration statement, we may sell from time to time in one or more offerings of Common Stock and Preferred Stock, various series of debt securities and/or warrants to purchase any of such securities, either individually or as units comprised of a combination of one or more of the other securities in one or more offerings up to a total dollar amount of $150 million. This prospectus provides you with a general description of the securities we may offer. Each time we sell any type or series of securities under this prospectus, we will provide a prospectus supplement that will contain more specific information about the terms of that offering.

This prospectus does not contain all of the information included in the registration statement. For a more complete understanding of the offering of the securities, you should refer to the registration statement, including its exhibits. We may add, update or change, in a prospectus supplement or free writing prospectus, any of the information contained in this prospectus or in the documents we have incorporated by reference into this prospectus. We may also authorize one or more free writing prospectuses to be provided to you that may contain material information relating to these offerings. This prospectus, together with the applicable prospectus supplement, any related free writing prospectus and the documents incorporated by reference into this prospectus and the applicable prospectus supplement, will include all material information relating to the applicable offering. You should carefully read both this prospectus and the applicable prospectus supplement and any related free writing prospectus, together with the additional information described under “Where You Can Find More Information,” before buying any of the securities being offered.

We have not authorized any dealer, agent or other person to give any information or to make any representation other than those contained or incorporated by reference in this prospectus, any accompanying prospectus supplement or any related free writing prospectus that we may authorize to be provided to you. You must not rely upon any information or representation not contained or incorporated by reference in this prospectus or an accompanying prospectus supplement, or any related free writing prospectus that we may authorize to be provided to you. This prospectus, the accompanying prospectus supplement and any related free writing prospectus, if any, do not constitute an offer to sell or the solicitation of an offer to buy any securities other than the registered securities to which they relate, nor do this prospectus, the accompanying prospectus supplement or any related free writing prospectus, if any, constitute an offer to sell or the solicitation of an offer to buy securities in any jurisdiction to any person to whom it is unlawful to make such offer or solicitation in such jurisdiction. You should not assume that the information contained in this prospectus, any applicable prospectus supplement or any related free writing prospectus is accurate on any date subsequent to the date set forth on the front of the document or that any information we have incorporated by reference is correct on any date subsequent to the date of the document incorporated by reference (as our business, financial condition, results of operations and prospects may have changed since that date), even though this prospectus, any applicable prospectus supplement or any related free writing prospectus is delivered or securities are sold on a later date.

We further note that the representations, warranties and covenants made by us in any agreement that is filed as an exhibit to any document that is incorporated by reference in this prospectus were made solely for the benefit of the parties to such agreement, including, in some cases, for the purpose of allocating risk among the parties to such agreements, and should not be deemed to be a representation, warranty or covenant to you. Moreover, such representations, warranties or covenants were accurate only as of the date when made. Accordingly, such representations, warranties and covenants should not be relied on as accurately representing the current state of our affairs.

This prospectus may not be used to consummate sales of our securities, unless it is accompanied by a prospectus supplement. To the extent there are inconsistencies between any prospectus supplement, this prospectus and any documents incorporated by reference, the document with the most recent date will control.

As permitted by the rules and regulations of the SEC, the registration statement, of which this prospectus forms a part, includes additional information not contained in this prospectus. You may read the registration statement and the other reports we file with the SEC at the SEC’s web site or at the SEC’s offices described below under the heading “Where You Can Find More Information.”

Company References

In this prospectus “TriSalus,” “the Company,” “we,” “our,” “ours,” “us” or similar terms refer to TriSalus Life Sciences, Inc., a Delaware corporation, and its subsidiaries, unless the context otherwise requires.

PROSPECTUS SUMMARY

The following summary highlights selected information contained elsewhere in this prospectus and in the documents incorporated by reference herein. It does not contain all the information that may be important to you and your investment decision. You should carefully read this entire prospectus, including the matters set forth under “Risk Factors,” the information included in any free writing prospectus that we have authorized for use in connection with this offering, and the documents incorporated by reference herein. Some of the statements in this prospectus constitute forward-looking statements. See “Cautionary Note Regarding Forward-Looking Statements.”

Overview

We are a high growth, high margin company approaching a level of revenues that can generate sufficient cash flow to sustain our operations. Beginning in 2020, our mission was to improve the delivery of therapeutics to solid tumors across a range of different diseases and tumor types. Additionally, we acquired an immune-oncology drug, nelitolimod, in July 2020, and conducted several Phase I clinical trials to study the ability and value of our PEDD technology. We have completed Phase I dose escalation (UMLM and LA-PDAC) and Phase Ib (ICC/HCC) clinical trials for nelitolimod. Due to physician and investigator interest, we are supporting two Investigator Initiated Trials of nelitolimod, one in patients with advanced HCC in combination with cryoablation, durvalumab and tremelimumab and another in patients with resectable colorectal liver metastases. Due to the excessive cost of capital, we do not intend to proceed to Phase II trials for that indication on our own, but we are looking for potential partners to advance that indication. Our PERIO-03 Phase I dose escalation in LA-PDAC has completed enrollment and we anticipate data from the study will be available in late 2025 and will begin discussions for a pharmaceutical partner for further clinical development.

Implications of Being an Emerging Growth Company and a Smaller Reporting Company

We are an emerging growth company, as defined in the Jumpstart Our Business Startups Act of 2012, as amended, and therefore we intend to take advantage of certain exemptions from various public company reporting requirements, including not being required to have our internal control over financial reporting audited by our independent registered public accounting firm pursuant to Section 404(b) of the Sarbanes- Oxley Act of 2002, reduced disclosure obligations regarding executive compensation in our periodic reports and our proxy statements and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and any golden parachute payments not previously approved. We will remain an emerging growth company until the earliest of (i) the last day of the fiscal year in which the market value of our Common Stock that is held by non-affiliates equals or exceeds $700 million as of the end of that year’s second fiscal quarter, (ii) the last day of the fiscal year in which we have total annual gross revenue of $1.235 billion or more during such fiscal year (as indexed for inflation), (iii) the date on which we have issued more than $1.0 billion in non-convertible debt in the prior three-year period or (iv) December 31, 2025.

We are also a smaller reporting company as defined in the Securities Exchange Act of 1934, as amended (the “Exchange Act”). We may continue to be a smaller reporting company even after we are no longer an emerging growth company. We may take advantage of certain of the scaled disclosures available to smaller reporting companies and will be able to take advantage of these scaled disclosures for so long as (i) the market value of our Common Stock held by non-affiliates is less than $250 million measured on the last business day of our second fiscal quarter, or (ii) our annual revenue is less than $100 million during the most recently completed fiscal year and the market value of Common Stock held by non-affiliates is less than $700 million measured on the last business day of our second fiscal quarter.

Corporate Information

The Securities We May Offer

We may offer shares of our Common Stock and preferred stock, various series of debt securities and warrants to purchase any of such securities, either individually or in units, from time to time under this prospectus, together with any applicable prospectus supplement and related free writing prospectus, at prices and on terms to be determined by market conditions at the time of offering. If we issue any debt securities at a discount from their original stated principal amount, then, for purposes of calculating the total dollar amount of all securities issued under this prospectus, we will treat the initial offering price of the debt securities as the total original principal amount of the debt securities. Each time we offer securities under this prospectus, we will provide offerees with a prospectus supplement that will describe the specific amounts, prices and other important terms of the securities being offered, including, to the extent applicable:

●

designation or classification;

●

aggregate principal amount or aggregate offering price;

●

maturity, if applicable;

●

original issue discount, if any;

●

rates and times of payment of interest or dividends, if any;

●

redemption, conversion, exchange or sinking fund terms, if any;

●

conversion or exchange prices or rates, if any, and, if applicable, any provisions for changes to or adjustments in the conversion or exchange prices or rates and in the securities or other property receivable upon conversion or exchange;

●

ranking;

●

restrictive covenants, if any;

●

voting or other rights, if any; and

●

important United States federal income tax considerations.

A prospectus supplement and any related free writing prospectus that we may authorize to be provided to you may also add, update, or change information contained in this prospectus or in documents we have incorporated by reference. However, no prospectus supplement or free writing prospectus will offer a security that is not registered and described in this prospectus at the time of the effectiveness of the registration statement of which this prospectus is a part.

We may sell the securities to or through underwriters, dealers or agents or directly to purchasers. We, as well as any agents acting on our behalf, reserve the sole right to accept and to reject in whole or in part any proposed purchase of securities. Each prospectus supplement will set forth the names of any underwriters, dealers or agents involved in the sale of securities described in that prospectus supplement and any applicable fee, commission or discount arrangements with them, details regarding any over-allotment option granted to them, and net proceeds to us. The following is a summary of the securities we may offer with this prospectus.

Common Stock

Our authorized capital stock includes 400,000,000 shares of common stock, having a par value per share of $0.0001. As of November 10, 2025, there were 49,964,311 shares of Common Stock issued and outstanding.

Preferred Stock

Our board of directors have the authority, without further action by the stockholders, to issue up to an aggregate of 10,000,000 shares of preferred stock in one or more series and to fix the designations, powers, preferences, privileges, and relative participating, optional, or special rights as well as the qualifications, limitations, or restrictions of the preferred stock, including dividend rights, conversion rights, voting rights, terms of redemption, and liquidation preferences, any or all of which may be greater than the rights of the common stock. Our board of directors, without stockholder approval, will be able to issue convertible preferred stock with voting, conversion, or other rights that could adversely affect the voting power and other rights of the holders of common stock. Preferred stock could be issued quickly with terms calculated to delay or prevent a change of control or make removal of management more difficult. Additionally, the issuance of preferred stock may have the effect of decreasing the market price of our Common Stock and may adversely affect the voting and other rights of the holders of common stock. At present, we have no plans to issue any shares of preferred stock following this offering.

Debt Securities

We may offer general debt obligations, which may be secured or unsecured, senior or subordinated, and convertible into shares of our common stock or preferred stock. In this prospectus, we refer to the senior debt securities and the subordinated debt securities together as the “debt securities.” We may issue debt securities under a note purchase agreement or under an indenture to be entered between us and a trustee. The indentures do not limit the amount of securities that may be issued under them and provide that debt securities may be issued in one or more series. The senior debt securities will have the same rank as all of our other indebtedness that is not subordinated. The subordinated debt securities will be subordinated to our senior debt on terms set forth in the applicable prospectus supplement. In addition, the subordinated debt securities will be effectively subordinated to creditors and preferred stockholders of our subsidiaries. We will determine the terms of each series of debt securities being offered. This prospectus contains only general terms and provisions of the debt securities. The applicable prospectus supplement will describe the particular terms of the debt securities offered thereby. You should read any prospectus supplement and any free writing prospectus that we may authorize to be provided to you related to the series of debt securities being offered, as well as the complete note agreements and/or indentures that contain the terms of the debt securities. The forms of senior and subordinated indentures have been filed as exhibits to the registration statement of which this prospectus is a part, and supplemental indentures and forms of debt securities containing the terms of debt securities being offered will be incorporated by reference into the registration statement of which this prospectus is a part from reports we file with the SEC.

Warrants

We may offer warrants for the purchase of shares of our Common Stock or preferred stock or of debt securities. We may issue the warrants by themselves or together with Common Stock, preferred stock or debt securities, and the warrants may be attached to or separate from any offered securities. Any warrants issued under this prospectus may be evidenced by warrant certificates. Warrants may be issued under a separate warrant agreement to be entered into between us and the investors or a warrant agent. Our Board of Directors will determine the terms of the warrants. This prospectus contains only general terms and provisions of the warrants. The applicable prospectus supplement will describe the particular terms of the warrants being offered thereby. You should read any prospectus supplement and any free writing prospectus that we may authorize to be provided to you related to the series of warrants being offered, as well as the complete warrant agreements that contain the terms of the warrants. Specific warrant agreements will contain additional important terms and provisions and will be incorporated by reference into the registration statement of which this prospectus is a part from reports we file with the SEC.

Units

We may offer units consisting of our Common Stock or preferred stock, debt securities and/or warrants to purchase any of these securities in one or more series. We may evidence each series of units by unit certificates that we will issue under a separate agreement. We may enter into unit agreements with a unit agent. Each unit agent will be a bank or trust company that we select. We will indicate the name and address of the unit agent in the applicable prospectus supplement relating to a particular series of units. This prospectus contains only a summary of certain general features of the units. The applicable prospectus supplement will describe the particular features of the units being offered thereby. You should read any prospectus supplement and any free writing prospectus that we may authorize to be provided to you related to the series of units being offered, as well as the complete unit agreements that contain the terms of the units. Specific unit agreements will contain additional important terms and provisions and will be incorporated by reference into the registration statement of which this prospectus is a part from reports we file with the SEC.

RISK FACTORS

An investment in our securities involves a high degree of risk. This prospectus contains, and the prospectus supplement applicable to each offering of our securities will contain, a discussion of the risks applicable to an investment in our securities. Prior to making a decision about investing in our securities, you should carefully consider the specific factors discussed under the heading “Risk Factors” in this prospectus and the applicable prospectus supplement, together with all of the other information contained or incorporated by reference in the prospectus supplement or appearing or incorporated by reference in this prospectus. You should also consider the risks, uncertainties and assumptions discussed under Item 1A, “Risk Factors,” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, filed with the SEC on April 15, 2025, as amended on May 30, 2025, and incorporated herein by reference, as may be amended, supplemented or superseded from time to time by other reports we file with the SEC in the future and any prospectus supplement related to a particular offering. The risks and uncertainties we have described are not the only ones we face. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also affect our operations. The occurrence of any of these known or unknown risks might cause you to lose all or part of your investment in the offered securities.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus and the documents incorporated by reference herein and any prospectus supplement delivered with this prospectus may contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). This includes, without limitation, statements regarding the financial position, business strategy, the plans and objectives of management for future operations, statements regarding future economic conditions or performance and statements of belief and any statement of assumptions underlying any of the foregoing. These statements constitute projections, forecasts and forward-looking statements, and are not guarantees of performance. We have based these forward-looking statements on our current expectations and projections about future events. Any statements that refer to projections, forecasts or other characterizations of future events or circumstances are forward-looking statements. In some cases, you can identify these forward-looking statements by the use of terminology such as “outlook,” “believes,” “expects,” “potential,” “continues,” “may,” “will,” “should,” “could,” “seeks,” “approximately,” “predicts,” “intends,” “plans,” “estimates,” “anticipates” or the negative version of these words or other comparable words or phrases.

These forward-looking statements are subject to known and unknown risks, uncertainties and assumptions about us that may cause our actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed or implied by such forward-looking statements. You should not place undue reliance on these forward-looking statements. There are no guarantees that the transactions and events described will happen as described (or that they will happen at all). Factors that may cause actual results to differ materially from current expectations include, among other things, those listed under the heading “Risk Factors” contained in our most recent Annual Report on Form 10-K, as updated by our subsequent Quarterly Reports on Form 10-Q and other filings we make with the SEC, which are incorporated by reference into this prospectus in their entirety together with other information in this prospectus and the documents incorporated by reference. In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. Except as otherwise required by applicable law, we disclaim any duty to update any forward-looking statements, all of which are expressly qualified by the statements in this section, to reflect events or circumstances after the date of this prospectus and any accompanying prospectus supplement.

You should read this prospectus and any accompanying prospectus supplement and the documents incorporated by reference herein or therein completely and with the understanding that our actual future results, levels of activity and performance as well as other events and circumstances may be materially different from what we expect. We qualify all of our forward-looking statements by these cautionary statements.

USE OF PROCEEDS

Unless otherwise indicated in the applicable prospectus supplement, we anticipate that the net proceeds from the sale of the securities under this prospectus will be used for general corporate purposes. General corporate purposes may include repayment of debt, capital expenditures, and any other purposes that we may specify in any prospectus supplement. In addition, we may use a portion of any net proceeds for the continued advancement of development activities for our product pipeline and strategic growth opportunities. We will have significant discretion in the use of any net proceeds. Investors will be relying on the judgment of our management regarding the application of the proceeds of any sale of the securities. We may invest the net proceeds temporarily until we use them for their stated purpose.

DESCRIPTION OF CAPITAL STOCK

The following description of our capital stock is not complete and may not contain all the information you should consider before investing in our capital stock. This description is summarized from, and qualified in its entirety by reference to, our Second Amended and Restated Certificate of Incorporation (the “Certificate of Incorporation”), Amended and Restated Bylaws (“Bylaws”) and certificate of designations, copies of which are filed as exhibits to the registration statement of which this prospectus is a part and are incorporated by reference herein.

Our authorized capital stock consists of:

●

400,000,000 shares of common stock, $0.0001 par value; and

●

10,000,000 shares of preferred stock, $0.0001 par value (of which 5,000,000 shares are designated as shares of Series A Convertible Preferred Stock and as of the date of this prospectus, no shares of Series A Convertible Preferred Stock are issued and outstanding).

Common Stock

Voting Rights

Each holder of Common Stock is entitled to one (1) vote for each share of Common Stock held of record by such holder on all matters submitted to a vote of our stockholders; provided, however, that, except as otherwise required in the Certificate of Incorporation or by applicable law, the holders of Common Stock shall not be entitled to vote on any amendment to the Certificate of Incorporation or any certificate of designation filed with respect to any series of our preferred stock that alters or changes the powers, preferences, rights or other terms of one or more outstanding series of our preferred stock if the holders of such affected series are entitled, either separately or together with the holders of one or more other such series, to vote thereon pursuant to the Certificate of Incorporation (including any certificate of designation relating to any series of preferred stock) or pursuant to the General Corporation Law of the State of Delaware.

Dividend Rights

Subject to applicable law and the rights of the holders of any outstanding class of our preferred stock, and the provisions of the Certificate of Incorporation, holders of Common Stock are entitled to receive such dividends and other distributions in cash, stock or property of the Company when, as and if declared thereon by our Board, in its sole discretion, from time to time out of assets or funds of the Company legally available therefor.

Rights upon Liquidation

Subject to applicable law and the rights and preferences of the holders of any holders of any shares of any outstanding class of preferred stock, in the event of any liquidation, dissolution or winding up of our affairs, whether voluntary or involuntary, after payment or provision for payment of our debts and any other payments required by law and amounts payable upon shares of preferred stock ranking senior to the shares of Common Stock upon such dissolution, liquidation or winding up, if any, our remaining net assets will be distributed to the holders of Common Stock and the holders of any other class or series of capital stock ranking equally with the Common Stock upon such dissolution, liquidation or winding up, equally on a per share basis.

Preemptive or Other Rights

The holders of Common Stock do not have preemptive or other subscription rights and there are no redemption or sinking fund provisions applicable to the Common Stock. The rights, preferences and privileges of holders of the Common Stock are subject to and may be adversely affected by the rights of the holders of shares of any series of preferred stock that we may designate and issue in the future..

Election of Directors

The Board is divided into three classes, Class I, Class II and Class III, with members of each class serving staggered three-year terms with only one class of directors being elected in each year. There is no cumulative voting with respect to the election of directors. Under the Bylaws, the election of directors is determined by plurality vote.

Preferred Stock

Our charter provides that shares of preferred stock may be issued from time to time in one or more series. Our Board is authorized to fix the voting rights, if any, designations, powers, preferences, the relative, participating, optional or other special rights and any qualifications, limitations and restrictions thereof, applicable to the shares of each series. Our Board is able to, without stockholder approval, issue preferred stock with voting and other rights that could adversely affect the voting power and other rights of the holders of the Common Stock and could have anti-takeover effects. The ability of our Board to issue preferred stock without stockholder approval could have the effect of delaying, deferring or preventing a change of control of us or the removal of existing management. While we have no current plans to issue additional preferred stock, circumstances in which we might issue additional preferred stock in the future could include, among others, offerings of preferred stock undertaken for capital raising purposes, issuances in connection with acquisitions we might make in the future, or issuances in connection with potential change of control or strategic transactions involving us. Any determination by us to issue shares of preferred stock in the future will be dependent on the facts and circumstances at the time.

Warrants

As of the date of this prospectus, there were approximately 1,751,825 Public Warrants to purchase an aggregate of 1,751,825 shares of Common Stock, 4,428,648 Private Placement Warrants to purchase an aggregate of 4,428,648 shares of Common Stock, 1,000,000 Working Capital Warrants to purchase an aggregate of 1,000,000 shares of Common Stock and 222,068 OrbiMed Warrants to purchase an aggregate of 222,068 shares of Common Stock.

Public Warrants

Each whole Public Warrant entitles the registered holder to purchase one share of our Common Stock at a price of $11.50 per share, subject to adjustment. The Public Warrants expire on August 10, 2028, or earlier upon redemption or liquidation.

We may call the Public Warrants for redemption:

	●	in whole and not in part;

	●	at a price of $0.01 per Public Warrant;

	●	upon not less than 30 days’ prior written notice of redemption (the “30-day redemption period”) to each warrantholder; and

	●	if, and only if, the reported closing price of the Common Stock equals or exceeds $18.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within a 30-trading day period ending three business days before we send the notice of redemption to the warrantholders.

We may not exercise our redemption right if the issuance of shares of Common Stock upon exercise of the warrants is not exempt from registration or qualification under applicable state blue sky laws or we are unable to effect such registration or qualification.

If we call the Public Warrants for redemption, management will have the option to require any holder that wishes to exercise its warrant to do so on a cashless basis. The exercise price and number of shares of common stock issuable upon exercise of the warrants may be adjusted in certain circumstances including in the event of a stock dividend, or recapitalization, reorganization, merger or consolidation.

Private Placement and Working Capital Warrants

The Private Placement Warrants and the Working Capital Warrants are identical to the Public Warrants except as set forth below. If holders of the Private Placement Warrants or Working Capital Warrants elect to exercise them on a cashless basis, they would pay the exercise price by surrendering their warrants for that number of shares of Common Stock equal to the quotient obtained by dividing (x) the product of the number of shares of Common Stock underlying the warrants multiplied by the excess of the “fair market value” (defined below) over the exercise price of the warrants by (y) the fair market value. The “fair market value” means the average reported closing price of the Common Stock for the 10 trading days ending on the third trading day prior to the date on which the notice of warrant exercise is sent to the warrant agent.

Additionally, the Private Placement Warrants and Working Capital Warrants will be non-redeemable so long as they are held by the initial purchasers or their permitted transferees. If the Private Placement Warrants or Working Capital Warrants are held by someone other than the initial purchasers or their permitted transferees, the Private Placement Warrants and Working Capital Warrants will be redeemable by the Company and exercisable by such holders on the same basis as the Public Warrants.

OrbiMed Warrants

In connection with the OrbiMed Credit Agreement, we issued OrbiMed the Initial OrbiMed Warrant to purchase 130,805 shares of Common Stock, with an exercise price of $9.5562, subject to adjustment as discussed below, at any time between issuance and the expiration of the Initial OrbiMed Warrant on April 30, 2031. On each of the closings of the Delayed Draw Commitment Amounts, if any, we agreed to issue Subsequent OrbiMed Warrants to purchase a number of shares of Common Stock determined by dividing 5% of the applicable Delayed Draw Commitment Amount by the 10-day volume weighted average sale price of Common Stock as of the issue date. On February 18, 2025, we issued to OrbiMed a warrant to purchase 64,748 and 26,515 shares of our Common Stock (the “Subsequent OrbiMed Warrant”), with the initial exercise price of $5.4787. During the three months ended June 30, 2025, the exercise price was adjusted to $5.3322 per share pursuant to the terms of the Subsequent OrbiMed Warrant. The Subsequent OrbiMed Warrant expires on February 18, 2032.

In connection with the OrbiMed Warrants, we entered into the OrbiMed Registration Rights Agreement, whereby OrbiMed will have certain customary registration rights with respect to the shares of Common Stock underlying the OrbiMed Warrants. If we fail to comply with certain of our obligations under the OrbiMed Registration Rights Agreement with respect to maintaining an effective registration statement covering shares of Common Stock underlying the OrbiMed Warrants, then the expiration date of an OrbiMed Warrant may be extended.

In the event of an issuance or sale by us of any Common Stock, options to purchase Common Stock or securities convertible into Common Stock, other than in connection with a dividend or distribution to holders of Common Stock or certain specified issuances or sales, for a price per share less than the exercise price then in effect, the exercise price will be reduced by multiplying such exercise price then in effect by a fraction, the numerator of which shall be the sum of (i) the number of shares of Common Stock Deemed Outstanding (as defined below) immediately prior to such sale or distribution multiplied by the exercise price then in effect, plus (ii) the consideration, if any, received by us upon such sale or distribution, and the denominator of which shall be the product of (a) the total number of shares of Common Stock Deemed Outstanding immediately after such sale or distribution multiplied by (b) the exercise price in effect immediately prior to such sale or distribution. As used herein, “Common Stock Deemed Outstanding” means, at any given time, the sum of (x) the number of shares of Common Stock actually outstanding at such time, plus (y) the number of shares of Common Stock issuable upon exercise of warrants, options or similar rights actually outstanding at such time, plus (z) the number of shares of Common Shares issuable upon conversion or exchange of convertible securities actually outstanding at such time (treating as actually outstanding any convertible securities issuable upon exercise of warrants, options or similar rights actually outstanding at such time), in each case, regardless of whether the warrants, options or similar rights or convertible securities are actually exercisable at such time; provided that Common Stock Deemed Outstanding at any given time shall not include shares of Common Stock owned or held by or for the account of the Company or any of its wholly owned subsidiaries.

If the number of outstanding shares of our Common Stock is decreased by any redemptions, recapitalizations, reclassifications, combinations or exchanges of shares, splits or reverse splits, separations, reorganizations, liquidations, substitutions, replacements of shares of Common Stock or other similar events, then, on the effective date of such event, the number of shares of Common Stock issuable on exercise of each OrbiMed Warrant will be proportionally decreased, and the exercise price will be proportionally increased.

If we grant, issue, offer or sell shares of Common Stock, options to purchase Common Stock or securities convertible into Common Stock, or rights to purchase shares, warrants, securities or other property, in each case pro rata to the record holders of Common Stock, then the holder of each OrbiMed Warrant shall be entitled to (but shall not be obligated to) acquire, upon the same terms applicable to such rights, the aggregate rights the holder would have been entitled to had a complete exercise of each OrbiMed Warrant been completed immediately prior to the date used to determine which holders of Common Stock were entitled to such grant, issuance, offer or sale.

Certain Anti-Takeover Provisions of Delaware Law and our Certificate of Incorporation and Bylaws

We are subject to the provisions of Section 203 of the General Corporation Law of the State of Delaware (“DGCL”) regulating corporate takeovers. This statute prevents certain Delaware corporations, under certain circumstances, from engaging in a “business combination” with:

	●	a stockholder who owns 15% or more of our outstanding voting stock (otherwise known as an “interested stockholder”);

	●	an affiliate of an interested stockholder; or

	●	an associate of an interested stockholder, for three years following the date that the stockholder became an interested stockholder.

A “business combination” includes a merger or sale of more than 10% of our assets. However, the above provisions of Section 203 do not apply if:

	●	our Board approves the transaction that made the stockholder an “interested stockholder,” prior to the date of the transaction;

	●	after the completion of the transaction that resulted in the stockholder becoming an interested stockholder, that stockholder owned at least 85% of our voting stock outstanding at the time the transaction commenced, other than statutorily excluded shares of Common Stock; or

	●	on or subsequent to the date of the transaction, the initial business combination is approved by our Board and authorized at a meeting of our stockholders, and not by written consent, by an affirmative vote of at least two-thirds of the outstanding voting stock not owned by the interested stockholder.

Our Certificate of Incorporation provides that the Board is classified into three classes of directors, each of which will generally serve for a term of three years with only one class of directors being elected in each year. As a result, in most circumstances, a person can gain control of our Board only by successfully engaging in a proxy contest at two or more annual meetings.

The authorized but unissued Common Stock and preferred stock are available for future issuances without stockholder approval and could be utilized for a variety of corporate purposes, including future offerings to raise additional capital, acquisitions and employee benefit plans. The existence of authorized but unissued and unreserved shares of Common Stock and preferred stock could render more difficult or discourage an attempt to obtain control of us by means of a proxy contest, tender offer, merger or otherwise.

Exclusive Forum for Certain Lawsuits

Our Certificate of Incorporation requires, to the fullest extent permitted by law, that derivative actions brought in our name, actions against directors, officers and employees for breach of fiduciary duty and other similar actions may be brought only in the Court of Chancery in the State of Delaware. Although we believe this provision benefits us by providing increased consistency in the application of Delaware law in the types of lawsuits to which it applies, a court may determine that this provision is unenforceable, and to the extent it is enforceable, the provision may have the effect of discouraging lawsuits against our directors and officers.

Despite the fact that our Certificate of Incorporation provides that the exclusive forum provision will be applicable to the fullest extent permitted by applicable law, Section 27 of the Exchange Act of 1934 and the rules and regulations thereunder, creates exclusive federal jurisdiction over all suits brought to enforce any duty or liability created by the Exchange Act or the rules and regulations thereunder. As a result, the exclusive forum provision does not apply to suits brought to enforce any duty or liability created by the Exchange Act or any other claim for which the federal courts have exclusive jurisdiction. In addition, our Certificate of Incorporation provides that, unless we consent in writing to the selection of an alternative forum, the federal district courts of the United States of America shall, to the fullest extent permitted by law, be the exclusive forum for the resolution of any complaint asserting a cause of action arising under the Securities Act or the rules and regulations promulgated thereunder. We note, however, that there is uncertainty as to whether a court would enforce this provision and that investors cannot waive compliance with the federal securities laws and the rules and regulations thereunder. Section 22 of the Securities Act creates concurrent jurisdiction for state and federal courts over all suits brought to enforce any duty or liability created by the Securities Act or the rules and regulations thereunder.

Special Meeting of Stockholders

Our Bylaws provide that special meetings of our stockholders may be called only by a majority vote of our Board, by our Chief Executive Officer or by our Chairman.

Advance Notice Requirements for Stockholder Proposals and Director Nominations

Our Bylaws provide that stockholders seeking to bring business before our annual meeting of stockholders, or to nominate candidates for election as directors at our annual meeting of stockholders, must provide timely notice of their intent in writing. To be timely, a stockholder’s notice will need to be received by the Company’s secretary at our principal executive offices not later than the close of business on the 90th day nor earlier than the opening of business on the 120th day prior to the anniversary date of the immediately preceding annual meeting of stockholders. Pursuant to Rule 14a-8 of the Exchange Act, proposals seeking inclusion in our annual proxy statement must comply with the notice periods contained therein. Our Bylaws also specify certain requirements as to the form and content of a stockholders’ meeting. These provisions may preclude our stockholders from bringing matters before our annual meeting of stockholders or from making nominations for directors at our annual meeting of stockholders.

Action by Written Consent

Any action required or permitted to be taken by holders of our Common Stock must be effected by a duly called annual or special meeting of such stockholders and may not be effected by written consent of the stockholders.

Transfer Agent

The transfer agent for our securities is Continental Stock Transfer & Trust Company. The transfer agent’s address is One State Street Plaza, 30 Floor New York, New York 10004.

Listing of Common Stock

Our Common Stock is currently traded on the Nasdaq Global under the symbol “TLSI.” Our Public Warrants currently trade on the Nasdaq Global under the symbol “TLSIW.” The Private Placement Warrants and Working Capital Warrants are not listed on a securities exchange nor traded in an over-the-counter market.

DESCRIPTION OF DEBT SECURITIES

The following description, together with the additional information we include in any applicable prospectus supplements or free writing prospectuses, summarizes the material terms and provisions of the debt securities that we may offer under this prospectus. We may issue debt securities, in one or more series, as either senior or subordinated debt or as senior or subordinated convertible debt. While the terms we have summarized below will apply generally to any future debt securities we may offer under this prospectus, we will describe the particular terms of any debt securities that we may offer in more detail in the applicable prospectus supplement or free writing prospectus. The terms of any debt securities we offer under a prospectus supplement may differ from the terms we describe below. However, no prospectus supplement shall fundamentally change the terms that are set forth in this prospectus or offer a security that is not registered and described in this prospectus at the time of its effectiveness. As of the date of this prospectus, we have no outstanding registered debt securities. Unless the context requires otherwise, whenever we refer to the “indentures,” we also are referring to any supplemental indentures that specify the terms of a particular series of debt securities.

We will issue any senior debt securities under the senior indenture that we will enter into with the trustee named in the senior indenture. We will issue any subordinated debt securities under the subordinated indenture and any supplemental indentures that we will enter into with the trustee named in the subordinated indenture. We have filed forms of these documents as exhibits to the registration statement, of which this prospectus is a part, and supplemental indentures and forms of debt securities containing the terms of the debt securities being offered will be filed as exhibits to the registration statement of which this prospectus is a part or will be incorporated by reference from reports that we file with the SEC.

The indentures will be qualified under the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”). We use the term “trustee” to refer to either the trustee under the senior indenture or the trustee under the subordinated indenture, as applicable.

The following summaries of material provisions of the senior debt securities, the subordinated debt securities and the indentures are subject to, and qualified in their entirety by reference to, all of the provisions of the indenture and any supplemental indentures applicable to a particular series of debt securities. We urge you to read the applicable prospectus supplements and any related free writing prospectuses related to the debt securities that we may offer under this prospectus, as well as the complete indentures that contains the terms of the debt securities. Except as we may otherwise indicate, the terms of the senior indenture and the subordinated indenture are identical.

General

The terms of each series of debt securities will be established by or pursuant to a resolution of our Board of Directors and set forth or determined in the manner provided in an officers’ certificate or by a supplemental indenture. Debt securities may be issued in separate series without limitation as to aggregate principal amount. We may specify a maximum aggregate principal amount for the debt securities of any series. We will describe in the applicable prospectus supplement the terms of the series of debt securities being offered, including:

●

the title;

●

the principal amount being offered, and if a series, the total amount authorized and the total amount outstanding;

●

any limit on the amount that may be issued;

●

whether or not we will issue the series of debt securities in global form, and, if so, the terms and who the depositary will be;

●

the maturity date;

●

whether and under what circumstances, if any, we will pay additional amounts on any debt securities held by a person who is not a United States person for tax purposes, and whether we can redeem the debt securities if we have to pay such additional amounts;

●

the annual interest rate, which may be fixed or variable, or the method for determining the rate and the date interest will begin to accrue, the dates interest will be payable and the regular record dates for interest payment dates or the method for determining such dates;

●

whether or not the debt securities will be secured or unsecured, and the terms of any secured debt;

●

the terms of the subordination of any series of subordinated debt;

●

the place where payments will be made;

●

restrictions on transfer, sale or other assignment, if any;

●

our right, if any, to defer payment of interest and the maximum length of any such deferral period;

●

the date, if any, after which, and the price at which, we may, at our option, redeem the series of debt securities pursuant to any optional or provisional redemption provisions and the terms of those redemption provisions;

●

provisions for a sinking fund purchase or other analogous fund, if any, including the date, if any, on which, and the price at which we are obligated, pursuant thereto or otherwise, to redeem, or at the holder’s option, to purchase, the series of debt securities and the currency or currency unit in which the debt securities are payable;

●

whether the indenture will restrict our ability or the ability of our subsidiaries, if any, to:

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incur additional indebtedness;

●

issue additional securities;

●

create liens;

●

pay dividends or make distributions in respect of our capital stock or the capital stock of our subsidiaries;

●

redeem capital stock;

●

place restrictions on our subsidiaries’ ability to pay dividends, make distributions or transfer assets;

●

make investments or other restricted payments;

●

sell or otherwise dispose of assets;

●

enter into sale-leaseback transactions;

●

engage in transactions with stockholders or affiliates;

●

issue or sell stock of our subsidiaries; or

●

effect a consolidation or merger;

●

whether the indenture will require us to maintain any interest coverage, fixed charge, cash flow-based, asset-based or other financial ratios;

●

a discussion of certain material or special United States federal income tax considerations applicable to the debt securities;

●

information describing any book-entry features;

●

the applicability of the provisions in the indenture on discharge;

●

whether the debt securities are to be offered at a price such that they will be deemed to be offered at an “original issue discount” as defined in paragraph (a) of Section 1273 of the Internal Revenue Code of 1986, as amended;

●

the denominations in which we will issue the series of debt securities, if other than denominations of $1,000 and any integral multiple thereof;

●

the currency of payment of debt securities if other than U.S. dollars and the manner of determining the equivalent amount in U.S. dollars; and

●

any other specific terms, preferences, rights or limitations of, or restrictions on, the debt securities, including any additional events of default or covenants provided with respect to the debt securities, and any terms that may be required by us or advisable under applicable laws or regulations.

Conversion or Exchange Rights

We will set forth in the applicable prospectus supplement the terms under which a series of debt securities may be convertible into or exchangeable for our Common Stock, our preferred stock or other securities (including securities of a third party). We will include provisions as to whether conversion or exchange is mandatory, at the option of the holder or at our option. We may include provisions pursuant to which the number of shares of our Common Stock, our preferred stock or other securities (including securities of a third party) that the holders of the series of debt securities receive would be subject to adjustment.

Consolidation, Merger or Sale

Unless we provide otherwise in the prospectus supplement applicable to a particular series of debt securities, the indentures will not contain any covenant that restricts our ability to merge or consolidate, or sell, convey, transfer or otherwise dispose of all or substantially all of our assets. However, any successor to or acquirer of such assets must assume all of our obligations under the indentures or the debt securities, as appropriate. If the debt securities are convertible into or exchangeable for our other securities or securities of other entities, the person with whom we consolidate or merge or to whom we sell all of our property must make provisions for the conversion of the debt securities into securities that the holders of the debt securities would have received if they had converted the debt securities before the consolidation, merger or sale.

Events of Default under the Indenture

Unless we provide otherwise in the prospectus supplement applicable to a particular series of debt securities, the following are events of default under the indentures with respect to any series of debt securities that we may issue:

●

if we fail to pay interest when due and payable and our failure continues for 90 days and the time for payment has not been extended;

●

if we fail to pay the principal, premium or sinking fund payment, if any, when due and payable at maturity, upon redemption or repurchase or otherwise, and the time for payment has not been extended;

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if we fail to observe or perform any other covenant contained in the debt securities or the indentures, other than a covenant specifically relating to another series of debt securities, and our failure continues for 90 days after we receive notice from the trustee or we and the trustee receive notice from the holders of at least 25% in aggregate principal amount of the outstanding debt securities of the applicable series; and

●

if specified events of bankruptcy, insolvency or reorganization occur.

We will describe in each applicable prospectus supplement any additional events of default relating to the relevant series of debt securities.

If an event of default with respect to debt securities of any series occurs and is continuing, other than an event of default specified in the last bullet point above, the trustee or the holders of at least 25% in aggregate principal amount of the outstanding debt securities of that series, by notice to us in writing, and to the trustee if notice is given by such holders, may declare the unpaid principal, premium, if any, and accrued interest, if any, due and payable immediately. If an event of default arises due to the occurrence of certain specified bankruptcy, insolvency or reorganization events, the unpaid principal, premium, if any, and accrued interest, if any, of each issue of debt securities then outstanding shall be due and payable without any notice or other action on the part of the trustee or any holder.

The holders of a majority in principal amount of the outstanding debt securities of an affected series may waive any default or event of default with respect to the series and its consequences, except defaults or events of default regarding payment of principal, premium, if any, or interest, unless we have cured the default or event of default in accordance with the indenture. Any waiver shall cure the default or event of default.

Subject to the terms of the indentures, if an event of default under an indenture shall occur and be continuing, the trustee will be under no obligation to exercise any of its rights or powers under such indenture at the request or direction of any of the holders of the applicable series of debt securities, unless such holders have offered the trustee reasonable indemnity or security satisfactory to it against any loss, liability or expense. The holders of a majority in principal amount of the outstanding debt securities of any series will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee, or exercising any trust or power conferred on the trustee, with respect to the debt securities of that series, provided that:

●

the direction so given by the holder is not in conflict with any law or the applicable indenture; and

●

subject to its duties under the Trust Indenture Act, the trustee need not take any action that might involve it in personal liability or might be unduly prejudicial to the holders not involved in the proceeding.

The indentures will provide that if an event of default has occurred and is continuing, the trustee will be required in the exercise of its powers to use the degree of care that a prudent person would use in the conduct of its own affairs. The trustee, however, may refuse to follow any direction that conflicts with law or the indenture, or that the trustee determines is unduly prejudicial to the rights of any other holder of the relevant series of debt securities, or that would involve the trustee in personal liability. Prior to taking any action under the indentures, the trustee will be entitled to indemnification against all costs, expenses and liabilities that would be incurred by taking or not taking such action.

A holder of the debt securities of any series will have the right to institute a proceeding under the indentures or to appoint a receiver or trustee, or to seek other remedies only if:

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the holder has given written notice to the trustee of a continuing event of default with respect to that series;

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the holders of at least 25% in aggregate principal amount of the outstanding debt securities of that series have made a written request and such holders have offered reasonable indemnity to the trustee or security satisfactory to it against any loss, liability or expense or to be incurred in compliance with instituting the proceeding as trustee; and

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the trustee does not institute the proceeding, and does not receive from the holders of a majority in aggregate principal amount of the outstanding debt securities of that series other conflicting directions within 90 days after the notice, request and offer.

These limitations do not apply to a suit instituted by a holder of debt securities if we default in the payment of the principal, premium, if any, or interest on, the debt securities, or other defaults that may be specified in the applicable prospectus supplement.

We will periodically file statements with the trustee regarding our compliance with specified covenants in the indentures.

The indentures will provide that if a default occurs and is continuing and is actually known to a responsible officer of the trustee, the trustee must mail to each holder notice of the default within the earlier of 90 days after it occurs and 30 days after it is known by a responsible officer of the trustee or written notice of it is received by the trustee, unless such default has been cured or waived. Except in the case of a default in the payment of principal or premium of, or interest on, any debt security or certain other defaults specified in an indenture, the trustee shall be protected in withholding such notice if and so long as the Board of Directors, the executive committee or a trust committee of directors, or responsible officers of the trustee, in good faith determine that withholding notice is in the best interests of holders of the relevant series of debt securities.

Modification of Indenture; Waiver

Subject to the terms of the indenture for any series of debt securities that we may issue, we and the trustee may change an indenture without the consent of any holders with respect to the following specific matters:

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to fix any ambiguity, defect or inconsistency in the indenture;

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to comply with the provisions described above under “Description of Debt Securities — Consolidation, Merger or Sale;”

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to comply with any requirements of the SEC in connection with the qualification of any indenture under the Trust Indenture Act;

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to add to, delete from or revise the conditions, limitations and restrictions on the authorized amount, terms or purposes of issue, authentication and delivery of debt securities, as set forth in the indenture;

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to provide for the issuance of, and establish the form and terms and conditions of, the debt securities of any series as provided under “Description of Debt Securities — General,” to establish the form of any certifications required to be furnished pursuant to the terms of the indenture or any series of debt securities, or to add to the rights of the holders of any series of debt securities;

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to evidence and provide for the acceptance of appointment hereunder by a successor trustee;

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to provide for uncertificated debt securities and to make all appropriate changes for such purpose;

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to add such new covenants, restrictions, conditions or provisions for the benefit of the holders, to make the occurrence, or the occurrence and the continuance, of a default in any such additional covenants, restrictions, conditions or provisions an event of default or to surrender any right or power conferred to us in the indenture; or

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to change anything that does not adversely affect the interests of any holder of debt securities of any series in any material respect.

In addition, under the indentures, the rights of holders of a series of debt securities may be changed by us and the trustee with the written consent of the holders of at least a majority in aggregate principal amount of the outstanding debt securities of each series that is affected. However, subject to the terms of the indenture for any series of debt securities that we may issue or otherwise provided in the prospectus supplement applicable to a particular series of debt securities, we and the trustee may only make the following changes with the consent of each holder of any outstanding debt securities affected:

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extending the stated maturity of the series of debt securities;

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reducing the principal amount, reducing the rate of or extending the time of payment of interest, or reducing any premium payable upon the redemption or repurchase of any debt securities; or

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reducing the percentage of debt securities, the holders of which are required to consent to any amendment, supplement, modification or waiver.

Discharge

Each indenture provides that, subject to the terms of the indenture and any limitation otherwise provided in the prospectus supplement applicable to a particular series of debt securities, we may elect to be discharged from our obligations with respect to one or more series of debt securities, except for specified obligations, including obligations to:

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replace stolen, lost or mutilated debt securities of the series;

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maintain paying agencies;

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hold monies for payment in trust;

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recover excess money held by the trustee;

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compensate and indemnify the trustee; and

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appoint any successor trustee.

In order to exercise our rights to be discharged, we will deposit with the trustee money or government obligations sufficient to pay all the principal of, and any premium and interest on, the debt securities of the series on the dates payments are due.

Form, Exchange and Transfer

We will issue the debt securities of each series only in fully registered form without coupons and, unless we otherwise specify in the applicable prospectus supplement, in denominations of $1,000 and any integral multiple thereof. The indentures will provide that we may issue debt securities of a series in temporary or permanent global form and as book-entry securities that will be deposited with, or on behalf of, The Depository Trust Company or another depositary named by us and identified in a prospectus supplement with respect to that series. See “Legal Ownership of Securities” below for a further description of the terms relating to any book-entry securities.

At the option of the holder, subject to the terms of the indentures and the limitations applicable to global securities described in the applicable prospectus supplement, the holder of the debt securities of any series can exchange the debt securities for other debt securities of the same series, in any authorized denomination and of like tenor and aggregate principal amount.

Subject to the terms of the indentures and the limitations applicable to global securities set forth in the applicable prospectus supplement, holders of the debt securities may present the debt securities for exchange or for registration of transfer, duly endorsed or with the form of transfer endorsed thereon duly executed if so required by us or the security registrar, at the office of the security registrar or at the office of any transfer agent designated by us for this purpose. Unless otherwise provided in the debt securities that the holder presents for transfer or exchange, we will make no service charge for any registration of transfer or exchange, but we may require payment of any taxes or other governmental charges.

We will name in the applicable prospectus supplement the security registrar, and any transfer agent in addition to the security registrar, that we initially designate for any debt securities. We may at any time designate additional transfer agents or rescind the designation of any transfer agent or approve a change in the office through which any transfer agent acts, except that we will be required to maintain a transfer agent in each place of payment for the debt securities of each series.

If we elect to redeem the debt securities of any series, we will not be required to:

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issue, register the transfer of, or exchange any debt securities of that series during a period beginning at the opening of business 15 days before the day of mailing of a notice of redemption of any debt securities that may be selected for redemption and ending at the close of business on the day of the mailing; or

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register the transfer of or exchange any debt securities so selected for redemption, in whole or in part, except the unredeemed portion of any debt securities we are redeeming in part.

Information Concerning the Trustee

The trustee, other than during the occurrence and continuance of an event of default under an indenture, undertakes to perform only those duties as are specifically set forth in the applicable indenture and is under no obligation to exercise any of the powers given it by the indentures at the request of any holder of debt securities unless it is offered reasonable security and indemnity against the costs, expenses and liabilities that it might incur. However, upon an event of default under an indenture, the trustee must use the same degree of care as a prudent person would exercise or use in the conduct of his or her own affairs.

Payment and Paying Agents

Unless we otherwise indicate in the applicable prospectus supplement, we will make payment of the interest on any debt securities on any interest payment date to the person in whose name the debt securities, or one or more predecessor securities, are registered at the close of business on the regular record date for the interest payment.

We will pay principal of and any premium and interest on the debt securities of a particular series at the office of the paying agents designated by us, except that unless we otherwise indicate in the applicable prospectus supplement, we will make interest payments by check that we will mail to the holder or by wire transfer to certain holders. Unless we otherwise indicate in the applicable prospectus supplement, we will designate the corporate trust office of the trustee as our sole paying agent for payments with respect to debt securities of each series. We will name in the applicable prospectus supplement any other paying agents that we initially designate for the debt securities of a particular series. We will maintain a paying agent in each place of payment for the debt securities of a particular series.

All money we pay to a paying agent or the trustee for the payment of the principal of or any premium or interest on any debt securities that remains unclaimed at the end of two years after such principal, premium or interest has become due and payable will be repaid to us, and the holder of the debt security thereafter may look only to us for payment thereof.

Governing Law

The indentures and the debt securities will be governed by and construed in accordance with the laws of the State of New York, except to the extent that the Trust Indenture Act is applicable.

Ranking Debt Securities

The subordinated debt securities will be unsecured and will be subordinate and junior in priority of payment to certain other indebtedness to the extent described in a prospectus supplement. The subordinated indenture does not limit the amount of subordinated debt securities that we may issue. It also does not limit us from issuing any other secured or unsecured debt.

The senior debt securities will be unsecured and will rank equally in right of payment to all our other senior unsecured debt. The senior indenture does not limit the amount of senior debt securities that we may issue. It also does not limit us from issuing any other secured or unsecured debt.

DESCRIPTION OF WARRANTS

The following description, together with the additional information we may include in any applicable prospectus supplements and free writing prospectuses, summarizes the material terms and provisions of the warrants that we may offer under this prospectus, which may consist of warrants to purchase Common Stock, Preferred Stock or debt securities and may be issued in one or more series. Warrants may be offered independently or together with Common Stock, Preferred Stock or debt securities offered by any prospectus supplement, and may be attached to or separate from those securities. While the terms we have summarized below will apply generally to any warrants that we may offer under this prospectus, we will describe the particular terms of any series of warrants that we may offer in more detail in the applicable prospectus supplement and any applicable free writing prospectus. The terms of any warrants offered under a prospectus supplement may differ from the terms described below. However, no prospectus supplement will fundamentally change the terms that are set forth in this prospectus or offer a security that is not registered and described in this prospectus at the time of its effectiveness.

We may issue the warrants under a warrant agreement that we will enter into with a warrant agent to be selected by us. If selected, the warrant agent will act solely as an agent of ours in connection with the warrants and will not act as an agent for the holders or beneficial owners of the warrants. If applicable, we will file as exhibits to the registration statement of which this prospectus is a part, or will incorporate by reference from a Current Report on Form 8-K that we file with the SEC, the form of warrant agreement, including a form of warrant certificate, that describes the terms of the particular series of warrants we are offering before the issuance of the related series of warrants. The following summaries of material provisions of the warrants and the warrant agreements are subject to, and qualified in their entirety by reference to, all the provisions of the warrant agreement and warrant certificate applicable to a particular series of warrants. We urge you to read the applicable prospectus supplement and any applicable free writing prospectus related to the particular series of warrants that we sell under this prospectus, as well as the complete warrant agreements and warrant certificates that contain the terms of the warrants.

General

We will describe in the applicable prospectus supplement the terms relating to a series of warrants, including:

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the offering price and aggregate number of warrants offered;

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the currency for which the warrants may be purchased;

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if applicable, the designation and terms of the securities with which the warrants are issued and the number of warrants issued with each such security or each principal amount of such security;

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if applicable, the date on and after which the warrants and the related securities will be separately transferable;

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in the case of warrants to purchase debt securities, the principal amount of debt securities purchasable upon exercise of one warrant and the price at, and currency in which, this principal amount of debt securities may be purchased upon such exercise;

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in the case of warrants to purchase Common Stock or preferred stock, the number of shares of Common Stock or preferred stock, as the case may be, purchasable upon the exercise of one warrant and the price at which these shares may be purchased upon such exercise;

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the effect of any merger, consolidation, sale or other disposition of our business on the warrant agreements and the warrants;

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the terms of any rights to redeem or call the warrants;

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any provisions for changes to or adjustments in the exercise price or number of securities issuable upon exercise of the warrants;

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the dates on which the right to exercise the warrants will commence and expire;

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the manner in which the warrant agreements and warrants may be modified;

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United States federal income tax consequences of holding or exercising the warrants;

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the terms of the securities issuable upon exercise of the warrants; and

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any other specific terms, preferences, rights or limitations of or restrictions on the warrants.

Before exercising their warrants, holders of warrants will not have any of the rights of holders of the securities purchasable upon such exercise, including:

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in the case of warrants to purchase debt securities, the right to receive payments of principal of, or premium, if any, or interest on, the debt securities purchasable upon exercise or to enforce covenants in the applicable indenture; or

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in the case of warrants to purchase common stock or preferred stock, the right to receive dividends, if any, or, payments upon our liquidation, dissolution or winding up or to exercise voting rights, if any.

Exercise of Warrants

Each warrant will entitle the holder to purchase the securities that we specify in the applicable prospectus supplement at the exercise price that we describe in the applicable prospectus supplement. Unless we otherwise specify in the applicable prospectus supplement, holders of the warrants may exercise the warrants at any time up to the specified time on the expiration date that we set forth in the applicable prospectus supplement. After the close of business on the expiration date, unexercised warrants will become void.

Holders of the warrants may exercise the warrants by delivering the warrant certificate representing the warrants to be exercised together with specified information, and paying the required amount to the warrant agent in immediately available funds, as provided in the applicable prospectus supplement. We will set forth on the reverse side of the warrant certificate and in the applicable prospectus supplement the information that the holder of the warrant will be required to deliver to us or the warrant agent as applicable.

Upon receipt of the required payment and the warrant certificate properly completed and duly executed at the corporate trust office of the warrant agent or any other office indicated in the applicable prospectus supplement, we will issue and deliver the securities purchasable upon such exercise. If fewer than all of the warrants represented by the warrant certificate are exercised, then we will issue a new warrant certificate for the remaining amount of warrants. If we so indicate in the applicable prospectus supplement, holders of the warrants may surrender securities as all or part of the exercise price for warrants.

Enforceability of Rights by Holders of Warrants

If selected, each warrant agent will act solely as our agent under the applicable warrant agreement and will not assume any obligation or relationship of agency or trust with any holder of any warrant. A single bank or trust company may act as warrant agent for more than one issue of warrants. A warrant agent will have no duty or responsibility in case of any default by us under the applicable warrant agreement or warrant, including any duty or responsibility to initiate any proceedings at law or otherwise, or to make any demand upon us. Any holder of a warrant may, without the consent of the related warrant agent or the holder of any other warrant, enforce by appropriate legal action its right to exercise, and receive the securities purchasable upon exercise of, its warrants.

DESCRIPTION OF UNITS

While the terms we have summarized below will apply generally to any units that we may offer under this prospectus, we will describe the particular terms of any series of units in more detail in the applicable prospectus supplement. The terms of any units offered under a prospectus supplement may differ from the terms described below. However, no prospectus supplement will fundamentally change the terms that are set forth in this prospectus or offer a security that is not registered and described in this prospectus at the time of its effectiveness.

We will file as exhibits to the registration statement of which this prospectus is a part, or will incorporate by reference from a Current Report on Form 8-K that we file with the SEC, the form of unit agreement that describes the terms of the series of units we are offering, and any supplemental agreements, before the issuance of the related series of units. The following summaries of material terms and provisions of the units are subject to, and qualified in their entirety by reference to, all the provisions of the unit agreement and any supplemental agreements applicable to a particular series of units. We urge you to read the applicable prospectus supplements related to the particular series of units that we sell under this prospectus, as well as the complete unit agreement and any supplemental agreements that contain the terms of the units.

General

We may issue units comprised of one or more debt securities, shares of Common Stock, shares of Preferred Stock and warrants in any combination. Each unit will be issued so that the holder of the unit is also the holder of each security included in the unit. Thus, the holder of a unit will have the rights and obligations of a holder of each included security. The unit agreement under which a unit is issued may provide that the securities included in the unit may not be held or transferred separately, at any time or at any time before a specified date.

We will describe in the applicable prospectus supplement the terms of the series of units, including:

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the designation and terms of the units and of the securities comprising the units, including whether and under what circumstances those securities may be held or transferred separately;

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any provisions of the governing unit agreement that differ from those described below; and

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any provisions for the issuance, payment, settlement, transfer or exchange of the units or of the securities comprising the units.

The provisions described in this section, as well as those described under “Description of Capital Stock,” “Description of Debt Securities” and “Description of Warrants” will apply to each unit and to any common stock, preferred stock, debt security or warrant included in each unit, respectively.

Unit Agent

The name and address of the unit agent, if any, for any units we offer will be set forth in the applicable prospectus supplement.

Issuance in Series

We may issue units in such amounts and in numerous distinct series as we determine.

Enforceability of Rights by Holders of Units

Each unit agent will act solely as our agent under the applicable unit agreement and will not assume any obligation or relationship of agency or trust with any holder of any unit. A single bank or trust company may act as unit agent for more than one series of units. A unit agent will have no duty or responsibility in case of any default by us under the applicable unit agreement or unit, including any duty or responsibility to initiate any proceedings at law or otherwise, or to make any demand upon us. Any holder of a unit may, without the consent of the related unit agent or the holder of any other unit, enforce by appropriate legal action its rights as holder under any security included in the unit.

We, the unit agents and any of their agents may treat the registered holder of any unit certificate as an absolute owner of the units evidenced by that certificate for any purpose and as the person entitled to exercise the rights attaching to the units so requested, despite any notice to the contrary. See “Legal Ownership of Securities.”

LEGAL OWNERSHIP OF SECURITIES

We can issue securities in registered form or in the form of one or more global securities. We describe global securities in greater detail below. We refer to those persons who have securities registered in their own names on the books that we or any applicable trustee or depositary or warrant agent maintain for this purpose as the “holders” of those securities. These persons are the legal holders of the securities. We refer to those persons who, indirectly through others, own beneficial interests in securities that are not registered in their own names, as “indirect holders” of those securities. As we discuss below, indirect holders are not legal holders, and investors in securities issued in book-entry form or in street name will be indirect holders.

Book-Entry Holders

We may issue securities in book-entry form only, as we will specify in the applicable prospectus supplement. This means securities may be represented by one or more global securities registered in the name of a financial institution that holds them as depositary on behalf of other financial institutions that participate in the depositary’s book-entry system. These participating institutions, which are referred to as participants, in turn, hold beneficial interests in the securities on behalf of themselves or their customers.

Only the person in whose name a security is registered is recognized as the holder of that security. Global securities will be registered in the name of the depositary or its participants. Consequently, for global securities, we will recognize only the depositary as the holder of the securities, and we will make all payments on the securities to the depositary. The depositary passes along the payments it receives to its participants, which in turn pass the payments along to their customers who are the beneficial owners. The depositary and its participants do so under agreements they have made with one another or with their customers; they are not obligated to do so under the terms of the securities.

As a result, investors in a global security will not own securities directly. Instead, they will own beneficial interests in a global security, through a bank, broker or other financial institution that participates in the depositary’s book-entry system or holds an interest through a participant. As long as the securities are issued in global form, investors will be indirect holders, and not legal holders, of the securities.

Street Name Holders

We may terminate a global security or issue securities that are not issued in global form. In these cases, investors may choose to hold their securities in their own names or in “street name.” Securities held by an investor in street name would be registered in the name of a bank, broker or other financial institution that the investor chooses, and the investor would hold only a beneficial interest in those securities through an account he or she maintains at that institution.

For securities held in street name, we or any applicable trustee or depositary will recognize only the intermediary banks, brokers and other financial institutions in whose names the securities are registered as the holders of those securities, and we or any such trustee or depositary will make all payments on those securities to them. These institutions pass along the payments they receive to their customers who are the beneficial owners, but only because they agree to do so in their customer agreements or because they are legally required to do so. Investors who hold securities in street name will be indirect holders, not legal holders, of those securities.

Legal Holders

Our obligations, as well as the obligations of any applicable trustee or third party employed by us or a trustee, run only to the legal holders of the securities. We do not have obligations to investors who hold beneficial interests in global securities, in street name or by any other indirect means. This will be the case whether an investor chooses to be an indirect holder of a security or has no choice because we are issuing the securities only in global form.

For example, once we make a payment or give a notice to the holder, we have no further responsibility for the payment or notice even if that holder is required, under agreements with its participants or customers or by law, to pass it along to the indirect holders but does not do so. Similarly, we may want to obtain the approval of the holders to amend an indenture, to relieve us of the consequences of a default or of our obligation to comply with a particular provision of an indenture, or for other purposes. In such an event, we would seek approval only from the legal holders, and not the indirect holders, of the securities. Whether and how the legal holders contact the indirect holders is up to the legal holders.

Special Considerations for Indirect Holders

If you hold securities through a bank, broker or other financial institution, either in book-entry form because the securities are represented by one or more global securities or in street name, you should check with your own institution to find out:

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how it handles securities payments and notices;

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whether it imposes fees or charges;

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how it would handle a request for the holders’ consent, if ever required;

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whether and how you can instruct it to send you securities registered in your own name so you can be a legal holder, if that is permitted in the future;

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how it would exercise rights under the securities if there were a default or other event triggering the need for holders to act to protect their interests; and

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if the securities are in book-entry form, how the depositary’s rules and procedures will affect these matters.

Global Securities

A global security is a security that represents one or any other number of individual securities held by a depositary. Generally, all securities represented by the same global securities will have the same terms.

Each security issued in book-entry form will be represented by a global security that we issue to, deposit with and register in the name of a financial institution or its nominee that we select. The financial institution that we select for this purpose is called the depositary. Unless we specify otherwise in the applicable prospectus supplement, The Depository Trust Company, New York, NY, known as DTC, will be the depositary for all securities issued in book-entry form.

A global security may not be transferred to or registered in the name of anyone other than the depositary, its nominee or a successor depositary, unless special termination situations arise. We describe those situations below under “— Special Situations When A Global Security Will Be Terminated.” As a result of these arrangements, the depositary, or its nominee, will be the sole registered owner and legal holder of all securities represented by a global security, and investors will be permitted to own only beneficial interests in a global security. Beneficial interests must be held by means of an account with a broker, bank or other financial institution that in turn has an account with the depositary or with another institution that does. Thus, an investor whose security is represented by a global security will not be a legal holder of the security, but only an indirect holder of a beneficial interest in the global security.

If the prospectus supplement for a particular security indicates that the security will be issued as a global security, then the security will be represented by a global security at all times unless and until the global security is terminated. If termination occurs, we may issue the securities through another book-entry clearing system or decide that the securities may no longer be held through any book-entry clearing system.

Special Considerations For Global Securities

As an indirect holder, an investor’s rights relating to a global security will be governed by the account rules of the investor’s financial institution and of the depositary, as well as general laws relating to securities transfers. We do not recognize an indirect holder as a holder of securities and instead deal only with the depositary that holds the global security.

If securities are issued only as global securities, an investor should be aware of the following:

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an investor cannot cause the securities to be registered in his or her name, and cannot obtain non-global certificates for his or her interest in the securities, except in the special situations we describe below;

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an investor will be an indirect holder and must look to his or her own bank or broker for payments on the securities and protection of his or her legal rights relating to the securities, as we describe above;

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an investor may not be able to sell interests in the securities to some insurance companies and to other institutions that are required by law to own their securities in non-book-entry form;

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an investor may not be able to pledge his or her interest in the global security in circumstances where certificates representing the securities must be delivered to the lender or other beneficiary of the pledge in order for the pledge to be effective;

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the depositary’s policies, which may change from time to time, will govern payments, transfers, exchanges and other matters relating to an investor’s interest in the global security. We and any applicable trustee have no responsibility for any aspect of the depositary’s actions or for its records of ownership interests in the global security. We and the trustee also do not supervise the depositary in any way;

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the depositary may, and we understand that DTC will, require that those who purchase and sell interests in the global security within its book-entry system use immediately available funds, and your broker or bank may require you to do so as well; and

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financial institutions that participate in the depositary’s book-entry system, and through which an investor holds its interest in the global security, may also have their own policies affecting payments, notices and other matters relating to the securities. There may be more than one financial intermediary in the chain of ownership for an investor. We do not monitor and are not responsible for the actions of any of those intermediaries.

Special Situations When A Global Security Will Be Terminated

In a few special situations described below, a global security will terminate and interests in it will be exchanged for physical certificates representing those interests. After that exchange, the choice of whether to hold securities directly or in street name will be up to the investor. Investors must consult their own banks or brokers to find out how to have their interests in securities transferred to their own names, so that they will be direct holders. We have described the rights of holders and street name investors above.

A global security will terminate when the following special situations occur:

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if the depositary notifies us that it is unwilling, unable or no longer qualified to continue as depositary for that global security and we do not appoint another institution to act as depositary within 90 days;

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if we notify any applicable trustee that we wish to terminate that global security; or

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if an event of default has occurred with regard to securities represented by that global security and has not been cured or waived.

The applicable prospectus supplement may also list additional situations for terminating a global security that would apply only to the particular series of securities covered by the prospectus supplement. When a global security terminates, the depositary, and neither we, nor any applicable trustee, is responsible for deciding the names of the institutions that will be the initial direct holders.

PLAN OF DISTRIBUTION

We may sell the securities being offered hereby in one or more of the following ways from time to time:

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through agents to the public or to investors;

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to underwriters for resale to the public or to investors;

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negotiated transactions;

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block trades;

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directly to investors; or

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through a combination of any of these methods of sale.

As set forth in more detail below, the securities may be distributed from time to time in one or more transactions:

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at a fixed price or prices, which may be changed;

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at market prices prevailing at the time of sale;

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at prices related to such prevailing market prices; or

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at negotiated prices.

We will set forth in a prospectus supplement the terms of that particular offering of securities, including:

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the name or names of any agents or underwriters;

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the purchase price of the securities being offered and the proceeds we will receive from the sale;

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any over-allotment options under which underwriters may purchase additional securities from us;

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any agency fees or underwriting discounts and other items constituting agents’ or underwriters’ compensation;

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any initial public offering price;

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any discounts or concessions allowed or re-allowed or paid to dealers; and

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any securities exchanges or markets on which such securities may be listed.

Only underwriters named in an applicable prospectus supplement are underwriters of the securities offered by that prospectus supplement.

If underwriters are used in an offering, we will execute an underwriting agreement with such underwriters and will specify the name of each underwriter and the terms of the transaction (including any underwriting discounts and other terms constituting compensation of the underwriters and any dealers) in a prospectus supplement. The securities may be offered to the public either through underwriting syndicates represented by managing underwriters or directly by one or more investment banking firms or others, as designated. If an underwriting syndicate is used, the managing underwriter(s) will be specified on the cover of the prospectus supplement. If underwriters are used in the sale, the offered securities will be acquired by the underwriters for their own accounts and may be resold from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. Any public offering price and any discounts or concessions allowed or re-allowed or paid to dealers may be changed from time to time. Unless otherwise set forth in the prospectus supplement, the obligations of the underwriters to purchase the offered securities will be subject to conditions precedent and the underwriters will be obligated to purchase all of the offered securities if any are purchased.

We may grant to the underwriters options to purchase additional securities to cover over-allotments, if any, at the public offering price, with additional underwriting commissions or discounts, as may be set forth in a related prospectus supplement. The terms of any over-allotment option will be set forth in the prospectus supplement for those securities.

If we use a dealer in the sale of the securities being offered pursuant to this prospectus or any prospectus supplement, we will sell the securities to the dealer, as principal. The dealer may then resell the securities to the public at varying prices to be determined by the dealer at the time of resale. The names of the dealers and the terms of the transaction will be specified in a prospectus supplement.

We may sell the securities directly or through agents we designate from time to time. We will name any agent involved in the offering and sale of securities and we will describe any commissions we will pay the agent in the prospectus supplement. Unless the prospectus supplement states otherwise, any agent will act on a best-efforts basis for the period of its appointment.

We may authorize agents or underwriters to solicit offers by institutional investors to purchase securities from us at the public offering price set forth in the prospectus supplement pursuant to delayed delivery contracts providing for payment and delivery on a specified date in the future. We will describe the conditions to these contracts and the commissions we must pay for solicitation of these contracts in the prospectus supplement.

In connection with the sale of the securities, underwriters, dealers or agents may receive compensation from us or from purchasers of the common stock for whom they act as agents in the form of discounts, concessions or commissions. Underwriters may sell the securities to or through dealers, and those dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters or commissions from the purchasers for whom they may act as agents. Underwriters, dealers and agents that participate in the distribution of the securities, and any institutional investors or others that purchase common stock directly and then resell the securities, may be deemed to be underwriters, and any discounts or commissions received by them from us and any profit on the resale of the common stock by them may be deemed to be underwriting discounts and commissions under the Securities Act.

We may provide agents and underwriters with indemnification against particular civil liabilities, including liabilities under the Securities Act, or contribution with respect to payments that the agents or underwriters may make with respect to such liabilities. Agents and underwriters may engage in transactions with, or perform services for, us in the ordinary course of business.

We may engage in at the market offerings into an existing trading market in accordance with Rule 415(a)(4) under the Securities Act. In addition, we may enter into derivative transactions with third parties (including the writing of options), or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement indicates, in connection with such a transaction, the third parties may, pursuant to this prospectus and the applicable prospectus supplement, sell securities covered by this prospectus and the applicable prospectus supplement. If so, the third party may use securities borrowed from us or others to settle such sales and may use securities received from us to close out any related short positions. We may also loan or pledge securities covered by this prospectus and the applicable prospectus supplement to third parties, who may sell the loaned securities or, in an event of default in the case of a pledge, sell the pledged securities pursuant to this prospectus and the applicable prospectus supplement. The third party in such sale transactions will be an underwriter and will be identified in the applicable prospectus supplement or in a post-effective amendment.

To facilitate an offering of a series of securities, persons participating in the offering may engage in transactions that stabilize, maintain, or otherwise affect the market price of the securities. This may include over-allotments or short sales of the securities, which involves the sale by persons participating in the offering of more securities than have been sold to them by us. In those circumstances, such persons would cover such over-allotments or short positions by purchasing in the open market or by exercising the over-allotment option granted to those persons. In addition, those persons may stabilize or maintain the price of the securities by bidding for or purchasing securities in the open market or by imposing penalty bids, whereby selling concessions allowed to underwriters or dealers participating in any such offering may be reclaimed if securities sold by them are repurchased in connection with stabilization transactions. The effect of these transactions may be to stabilize or maintain the market price of the securities at a level above that which might otherwise prevail in the open market. Such transactions, if commenced, may be discontinued at any time. We make no representation or prediction as to the direction or magnitude of any effect that the transactions described above, if implemented, may have on the price of our securities.

Unless otherwise specified in the applicable prospectus supplement, each class or series of securities will be a new issue with no established trading market, other than our Common Stock, which is listed on Nasdaq. We may elect to list any other class or series of securities on any exchange or market, but we are not obligated to do so. It is possible that one or more underwriters may make a market in a class or series of securities, but the underwriters will not be obligated to do so and may discontinue any market making at any time without notice. We cannot give any assurance as to the liquidity of the trading market for any of the securities.

In order to comply with the securities laws of some U.S. states or territories, if applicable, the securities offered pursuant to this prospectus will be sold in those states only through registered or licensed brokers or dealers. In addition, in some states securities may not be sold unless they have been registered or qualified for sale in the applicable state or an exemption from the registration or qualification requirement is available and complied with.

Any underwriter may engage in overallotment, stabilizing transactions, short covering transactions and penalty bids in accordance with Regulation M under the Exchange Act. Overallotment involves sales in excess of the offering size, which create a short position. Stabilizing transactions permit bids to purchase the underlying security so long as the stabilizing bids do not exceed a specified maximum. Short covering transactions involve purchases of the securities in the open market after the distribution is completed to cover short positions. Penalty bids permit the underwriters to reclaim a selling concession from a dealer when the securities originally sold by the dealer are purchased in a covering transaction to cover short positions. Those activities may cause the price of the securities to be higher than it would otherwise be. If commenced, the underwriters may discontinue any of these activities at any time.

Any underwriters who are qualified market makers on Nasdaq may engage in passive market making transactions in the securities on Nasdaq in accordance with Rule 103 of Regulation M, during the business day prior to the pricing of the offering, before the commencement of offers or sales of the securities. Passive market makers must comply with applicable volume and price limitations and must be identified as passive market makers. In general, a passive market maker must display its bid at a price not in excess of the highest independent bid for such security. If all independent bids are lowered below the passive market maker’s bid, however, the passive market maker’s bid must then be lowered when certain purchase limits are exceeded.

LEGAL MATTERS

The validity of the issuance of the securities offered hereby will be passed upon for us by Sheppard, Mullin, Richter & Hampton LLP, New York, New York. Additional legal matters may be passed upon for us or any underwriters, dealers or agents, by counsel that we will name in the applicable prospectus supplement.

EXPERTS

The consolidated financial statements of TriSalus Life Sciences, Inc. as of December 31, 2024, and for the year then ended, incorporated by reference in this prospectus and elsewhere in the registration statement, have been so incorporated by reference in reliance on the report of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in accounting and auditing.

The consolidated financial statements of TriSalus Life Sciences, Inc. as of December 31, 2023, and for the year then ended, have been incorporated by reference herein, include the effects of the adjustment to retrospectively apply the change in accounting as described in Note 2 to the consolidated financial statements. KPMG LLP, an independent registered public accounting firm, audited the consolidated financial statements as of December 31, 2023, and for the year then ended, before the effects of the retrospective adjustment, which financial statements are not included (incorporated by reference) herein. Grant Thornton LLP, an independent registered public accounting firm, audited the retrospective adoption. The consolidated financial statement of TriSalus Life Sciences, Inc. as of December 31, 2023, and for the year then ended, have been incorporated by reference herein in reliance upon the report of (1) KPMG LLP, solely with respect to the financial statements before the effects of the retrospective adjustment, and (2) Grant Thornton LLP, solely with respect to the retrospective adjustment, incorporate by reference herein, and upon the authority of said firms as experts in accounting and auditing.

WHERE YOU CAN FIND MORE INFORMATION

This prospectus constitutes a part of the registration statement on Form S-3 that we have filed with the SEC under the Securities Act. As permitted by the SEC’s rules, this prospectus and any accompanying prospectus supplement, which forms a part of the registration statement, do not contain all of the information that is included in the registration statement. You will find additional information about us in the registration statement. Any statement made in this prospectus or any accompanying prospectus supplement concerning legal documents are not necessarily complete and you should read the documents that are filed as exhibits to the registration statement or otherwise filed with the SEC for a more complete understanding of the document or matter.

You may also read and copy any document we file with the SEC at its public reference facilities at 100 F Street, N.E., Room 1580, Washington, DC 20549. You may also obtain copies of these documents at prescribed rates by writing to the Public Reference Section of the SEC at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further information on the operation of the public reference facilities. You may also request a copy of these filings, at no cost, by writing or telephoning us at: TriSalus Life Sciences, Inc., 6272 W. 91st Ave., Westminster, Colorado 80031 or (888) 321-5212.

INCORPORATION OF DOCUMENTS BY REFERENCE

This prospectus is part of the registration statement, but the registration statement includes and incorporates by reference additional information and exhibits. The SEC permits us to “incorporate by reference” the information contained in documents we file with the SEC, which means that we can disclose important information to you by referring you to those documents rather than by including them in this prospectus. Information that is incorporated by reference is considered to be part of this prospectus and you should read it with the same care that you read this prospectus and any subsequent prospectus supplement. Information that we file later with the SEC will automatically update and supersede the information that is either contained, or incorporated by reference, in this prospectus, and will be considered to be a part of this prospectus from the date those documents are filed.

We incorporate by reference the documents listed below, all filings filed by us pursuant to the Securities Exchange Act of 1934, as amended (the “Exchange Act”), after the date of the registration statement of which this prospectus, and any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act prior to the time that all securities covered by this prospectus have been sold; provided, however, that we are not incorporating any information furnished under either Item 2.02 or Item 7.01 of any Current Report on Form 8-K and exhibits furnished on such form that relate to such items:

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our Annual Report on Form 10-K for the year ended December 31, 2024, filed with the SEC on April 15, 2025, as amended by the Form 10-K/A filed with the SEC on May 30, 2025;

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our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2025, June 30, 2025 and September 30, 2025, filed with the SEC on May 15, 2025, August 12, 2025 and November 13, 2025, respectively;

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the information specifically incorporated by reference into our Annual Report on Form 10-K, as amended, for the fiscal year ended December 31, 2024 from our definitive proxy statement on Schedule 14A (other than information furnished rather than filed) filed with the SEC on April 30, 2025;

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our Current Reports on Form 8-K filed with the SEC on January 8, 2025, January 31, 2025, February 19, 2025, February 25, 2025, April 17, 2025, April 23, 2025, April 30, 2025, May 30, 2025, June 16, 2025, June 23, 2025, July 24, 2025, August 29, 2025, and October 1, 2025 (other than the portions thereof which are furnished and not filed); and

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the description of our securities contained in Exhibit 4.7 to our Annual Report on Form 10-K, as amended, for the fiscal year ended December 31, 2024, filed with the SEC on April 15, 2025, as amended on May 30, 2025.

Any statements made in a document incorporated by reference in this prospectus are deemed to be modified or superseded for purposes of this prospectus to the extent that a statement in this prospectus or in any other subsequently filed document, which is also incorporated by reference, modifies or supersedes the statement. Any statement made in this prospectus is deemed to be modified or superseded to the extent a statement in any subsequently filed document, which is incorporated by reference in this prospectus, modifies or supersedes such statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a part of this prospectus. 

The information relating to us contained in this prospectus should be read together with the information in the documents incorporated by reference. In addition, certain information, including financial information, contained in this prospectus or incorporated by reference in this prospectus should be read in conjunction with documents we have filed with the SEC.

We will provide to each person, including any beneficial holder, to whom a prospectus is delivered, at no cost, upon written or oral request, a copy of any or all of the information that has been incorporated by reference in the prospectus but not delivered with the prospectus. Requests for documents should be by writing to or telephoning us at the following address: TriSalus Life Sciences, Inc., 6272 W. 91^st Ave., Westminster, CO 80031, (888) 321-5212. Exhibits to these filings will not be sent unless those exhibits have been specifically incorporated by reference in such filings.

9,756,100 Shares of Common Stock

PROSPECTUS SUPPLEMENT

Sole Book-Runner

Lake Street

February 19, 2026

SEC Form 424B5 filed by TriSalus Life Sciences Inc.