tennx_s3.htm

S-3 1 tennx_s3.htm FORM S-3 tennx_s3.htm

As filed with the Securities and Exchange Commission on March 24, 2026

Registration Statement No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-3

REGISTRATION STATEMENT UNDER

THE SECURITIES ACT OF 1933

TENAX THERAPEUTICS, INC.

(Exact name of registrant as specified in its charter)

Delaware

26-2593535

(State or other jurisdiction

of incorporation or organization)

(I.R.S. Employer

Identification Number)

101 Glen Lennox Drive, Suite 300

Chapel Hill, North Carolina 27517

Telephone: (919) 855-2100

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Christopher Giordano

Tenax Therapeutics, Inc.

President and Chief Executive Officer

101 Glen Lennox Drive, Suite 300

Chapel Hill, North Carolina 27517

Telephone: (919) 855-2100

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Donald R. Reynolds

S. Halle Vakani

Lorna A. Knick

Wyrick Robbins Yates & Ponton LLP

4101 Lake Boone Trail, Suite 300

Raleigh, North Carolina 27607

Telephone: (919) 781-4000

Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this Registration Statement.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒	Smaller reporting company	☒
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of Securities Act. ☐

____________________________

The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment that specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act or until the registration statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.

The information in this prospectus is not complete and may be changed. These securities may not be sold until the registration statement filed with the U.S. Securities and Exchange Commission is effective. The prospectus is not an offer to sell these securities and does not constitute the solicitation of offers to buy these securities in any jurisdiction where the offer or sale is not permitted.

Subject to completion, dated March 24, 2026

PRELIMINARY PROSPECTUS

$300,000,000

Common stock

Preferred Stock

Debt Securities

Warrants

Units and/or

Rights

We may offer and sell from time to time up to $300,000,000 of our shares of common stock, shares of preferred stock, debt securities, warrants, rights to purchase common stock, preferred stock, debt securities or units, or units consisting of a combination of any such securities in one or more offerings in amounts, at prices and on terms that we will determine at the time of offering.

This prospectus provides you with a general description of the securities we may offer. A prospectus supplement containing specific information about the terms of the securities being offered and the offering, including the compensation of any underwriter, agent or dealer, will accompany this prospectus to the extent required. Any prospectus supplement may also add, update or change information contained in this prospectus. If information in any prospectus supplement is inconsistent with the information in this prospectus, then the information in that prospectus supplement will apply and will supersede the information in this prospectus. You should carefully read both this prospectus and any prospectus supplement, together with additional information described in “Where You Can Find Additional Information” and “Incorporation of Documents by Reference”, before you invest in our securities.

Our common stock is traded on The Nasdaq Capital Market under the symbol “TENX.” On March 23, 2026, the last reported sale price of our common stock was $14.27 per share. We recommend that you obtain current market quotations for our common stock prior to making an investment decision.

Investing in our securities involves a high degree of risk. See “Risk Factors” beginning on page 7 of this prospectus and in the documents incorporated by reference herein, to read about factors you should consider before investing in our securities.

Neither the U.S. Securities and Exchange Commission nor any other regulatory body has approved or disapproved of these securities or passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offense.

Prospectus dated , 2026

TABLE OF CONTENTS

		Page

ABOUT THIS PROSPECTUS		3
SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS		4
INDUSTRY AND MARKET DATA		5
THE COMPANY		6
RISK FACTORS		7
USE OF PROCEEDS		8
PLAN OF DISTRIBUTION		9
DESCRIPTION OF CAPITAL STOCK		12
DESCRIPTION OF WARRANTS		16
DESCRIPTION OF DEBT SECURITIES		18
DESCRIPTION OF THE UNITS		20
DESCRIPTION OF THE RIGHTS		21
LEGAL MATTERS		23
EXPERTS		23
WHERE YOU CAN FIND ADDITIONAL INFORMATION		23
INCORPORATION OF CERTAIN INFORMATION BY REFERENCE		23

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ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that we filed with the Securities and Exchange Commission (the “SEC”), utilizing a shelf registration process. Under this shelf registration process, we may offer shares of our common stock, shares of our preferred stock, debt securities, warrants for such securities, rights to purchase common stock, preferred stock, debt securities or units, or units consisting of a combination of any such securities, in one or more offerings, up to a total dollar amount of $300,000,000. This prospectus provides you with a general description of the securities we may offer. Each time we offer a type or series of securities under this prospectus, we will provide a prospectus supplement that will contain specific information about the terms of that offering. We may also authorize one or more free writing prospectuses to be provided to you that may contain material information relating to any 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. Prospectus supplements and any related free writing prospectus may also add, update or change information contained or incorporated by reference in this prospectus. However, no prospectus supplement or any related free writing prospectus 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. This prospectus, together with the applicable prospectus supplements and any related free writing prospectus and the documents incorporated by reference herein and therein, will include material information relating to the offering. You should carefully read this prospectus, the applicable prospectus supplement and any related free writing prospectus, the information and documents incorporated herein and therein by reference and the additional information under the heading “Where You Can Find Additional Information” before making an investment decision.

You should rely only on the information we have provided or incorporated by reference in this prospectus or any prospectus supplement or any related free writing prospectus. We have not authorized anyone to provide you with information different from that contained or incorporated by reference in this prospectus or any prospectus supplement or any related free writing prospectus. No dealer, salesperson or other person is authorized to give any information or to represent anything not contained or incorporated by reference in this prospectus or any prospectus supplement or any related free writing prospectus. You must not rely on any unauthorized information or representation. This prospectus is an offer to sell only the securities offered hereby, but only under circumstances and in jurisdictions where it is lawful to do so. You should assume that the information in this prospectus or any prospectus supplement or any related free writing prospectus is accurate only as of the date on the front of the document and that any information we have incorporated herein and therein by reference is accurate only as of the date of the document incorporated by reference, regardless of the time of delivery of this prospectus or any prospectus supplement or any related free writing prospectus or any sale of a security.

This prospectus contains 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 filed, will be filed or will be incorporated by reference as exhibits to the registration statement of which this prospectus is a part, and you may obtain copies of those documents as described below under the heading “Where You Can Find Additional Information.”

To the extent there are inconsistencies between this prospectus, any prospectus supplement and any related free writing prospectus and any documents incorporated by reference, the document with the most recent date will control.

THIS PROSPECTUS MAY NOT BE USED TO CONSUMMATE SALES OF OUR SECURITIES, UNLESS IT IS ACCOMPANIED BY A PROSPECTUS SUPPLEMENT.

When used herein, unless the context requires otherwise, references to “Tenax,” “Tenax Therapeutics,” the “Company,” “we,” “our” and “us” refer to Tenax Therapeutics, Inc., a Delaware corporation.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus contains various 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”), which represent our expectations or beliefs concerning future events. Forward-looking statements include statements that are predictive in nature, which depend upon or refer to future events or conditions, and/or which include words such as “believes,” “plans,” “intends,” “anticipates,” “estimates,” “expects,” “may,” “will” or similar expressions. These statements are not guarantees of future performance, and we undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by law.

Forward-looking statements are based on current expectations and projections about future events, actual events and results may differ materially from those expressed or forecasted in forward-looking statements due to a number of factors. You should understand that the following important factors, in addition to those discussed in under the heading “Risk Factors” included elsewhere in this prospectus and incorporated herein by reference, could affect our stock price or future results and could cause those results to differ materially from those expressed in such forward-looking statements:

	·	our ability to develop and ultimately commercialize our current product candidates, and any product candidate which we may develop or in-license in the future;
	·	delays in the commencement, enrollment and completion of clinical testing, as well as the analysis and reporting of results from such clinical testing;
	·	our ability, our partners’ abilities, and third parties’ abilities to protect and assert intellectual property rights;
	·	the success of nonclinical and clinical studies of our product candidates;
	·	the need and ability to obtain regulatory approval of our product candidates and any delays in such regulatory review;
	·	potential risks related to any collaborations we may enter into for our product candidates;
	·	our ability to establish an effective sales and marketing infrastructure;
	·	our estimates regarding the potential market opportunity for our product candidates;
	·	competition from existing products or new products that may emerge;
	·	potential side effects of our product candidates that could delay or prevent commercialization;
	·	potential product liability claims and adverse events;
	·	potential liabilities associated with hazardous materials;
	·	our ability to maintain adequate insurance policies;
	·	our dependence on third-party manufacturers and clinical research organizations (“CROs”);
	·	our ability to establish or maintain collaborations, licensing or other arrangements;
	·	costs related to and outcomes of potential litigation;
	·	compliance with obligations under intellectual property licenses with third parties;
	·	our ability to adequately support future growth;
	·	our ability to attract and retain personnel, including our executive team, advisors and members of our Board of Directors; and
	·	geopolitical uncertainties, including in the Middle East and the Russian invasion of and war against the country of Ukraine.

The forward-looking statements in this prospectus represent our views as of the date such statements are made. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date such statements are made.

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INDUSTRY AND MARKET DATA

Unless otherwise indicated, information contained in this prospectus concerning our industry and the market in which we operate, including our market position, market opportunity and market size, is based on information from various sources, on assumptions that we have made based on such data and other similar sources and on our knowledge of the markets for our products. These data sources involve a number of assumptions and limitations, and you are cautioned not to give undue weight to such estimates.

We have not independently verified any third-party information. While we believe the market position, market opportunity and market size information included in this prospectus is generally reliable, such information is inherently imprecise. In addition, projections, assumptions and estimates of our future performance and the future performance of the industry in which we operate is necessarily subject to a high degree of uncertainty and risk due to a variety of factors, including those described under the heading “Risk Factors” and elsewhere in this prospectus and incorporated herein by reference. These and other factors could cause results to differ materially from those expressed in the estimates made by the independent parties and by us.

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THE COMPANY

Tenax Therapeutics is a Phase 3, development-stage pharmaceutical company using clinical insights to develop novel cardiopulmonary therapies. We employ a clinician-driven drug development approach, led by key opinion leaders and heart failure experts and informed by their clinical insights to precisely target disease pathophysiology. We are currently actively conducting the LEVEL and LEVEL-2 clinical trials to evaluate levosimendan as our prioritized product candidate and have deprioritized a Phase 3 clinical trial of imatinib, two drugs supported by promising evidence that they may significantly improve the lives of patients with pulmonary hypertension. Importantly, both levosimendan and imatinib have already been approved in other indications and prescribed around the world for more than 20 years, and we believe their mechanisms of action are uniquely suitable to target and treat pulmonary hypertension. We believe this derisked approach of using already-approved drugs that provide well-established safety profiles from millions of patients, combined with a development path led by preeminent cardiovascular and pulmonary hypertension experts, puts us in a strong position to deliver breakthrough cardiopulmonary therapies designed to improve patients’ functioning and quality of life.

In March 2025, we closed a private placement financing (the “March 2025 Offering”) raising gross proceeds of $25.0 million. We intend to use the net proceeds from the March 2025 Offering, in addition to the approximately $100.0 million raised in August 2024, to advance our Phase 3 oral levosimendan program. Specifically, we plan to complete our ongoing Phase 3 LEVEL study of TNX-103 in pulmonary hypertension in heart failure with preserved ejection fraction (“PH-HFpEF”). We also plan to advance our second global Phase 3 study, LEVEL-2, which was initiated in December 2025. Following completion of the two Phase 3 levosimendan trials, we intend to submit marketing authorization applications. We also plan to submit an application for imatinib following a single Phase 3 trial, when appropriate.

Our principal executive offices are located at 101 Glen Lennox Drive, Suite 300, Chapel Hill, North Carolina 27517, and our telephone number is (919) 855‑2100. Our website address is www.tenaxthera.com. Our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to reports filed pursuant to Sections 13(a) and 15(d) of the Exchange Act will be made available free of charge on our website as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. The contents of our website are not incorporated into this prospectus and our reference to the URL for our website is intended to be an inactive textual reference only.

“Tenax”, the Tenax logo and other trademarks or service marks of Tenax Therapeutics, Inc. appearing in this prospectus are the property of Tenax Therapeutics, Inc.

Implications of Being a Smaller Reporting Company

We are a “smaller reporting company” as defined in the Exchange Act. As a smaller reporting company, we may take advantage of specified reduced disclosure and other requirements that are otherwise applicable, in general, to public companies that are not smaller reporting companies. These provisions include (i) not being required to comply with the auditor attestation requirements of Section 404(b) of the Sarbanes Oxley Act of 2002, as amended; (ii) scaled executive compensation disclosures; and (iii) the option to provide only two years of audited financial statements, instead of three years.

We will continue to be a smaller reporting company if the Company has (i) less than $250 million in market value of its shares held by non-affiliates as of the last business day of its second fiscal quarter or (ii) less than $100 million of annual revenues in its most recent fiscal year completed before the last business day of its second fiscal quarter and a market value of its shares held by non-affiliates of less than $700 million as of the last business day of its second fiscal quarter.

We may choose to take advantage of some but not all of these exemptions. We have taken advantage of reduced reporting requirements in this prospectus. Accordingly, the information contained herein may be different from the information you receive from other public companies in which you hold stock.

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RISK FACTORS

Investing in our securities involves a high degree of risk. Before purchasing our securities, you should consider carefully the risks and uncertainties described in the section entitled “Risk Factors” contained in our Annual Report on Form 10-K for the year ended December 31, 2025, as filed with the SEC on March 10, 2026, which are incorporated in this prospectus by reference in their entirety, as well as in subsequently filed SEC reports and any prospectus supplement, together with all of the other information included in this prospectus. These risks and uncertainties are not the only risks and uncertainties we face. Additional risks and uncertainties not currently known to us, or that we currently view as immaterial, may also impair our business. If any of the risks or uncertainties described in our SEC filings or any additional risks and uncertainties actually occur, our business, financial condition, results of operations and cash flow could be materially and adversely affected. In that case, the trading price of our common stock could decline and you might lose all or part of your investment. Please also refer to the section entitled “Special Note Regarding Forward-Looking Statements.”

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USE OF PROCEEDS

We intend to use the net proceeds from the sale of any securities offered under this prospectus for general corporate purposes unless otherwise indicated in the applicable prospectus supplement. General corporate purposes may include research and development costs, including the conduct of one or more clinical trials and the development and manufacturing, and potentially commercialization if approved by regulatory authorities, of our product candidates, working capital, capital expenditures and other general corporate purposes. We may temporarily invest the net proceeds in a variety of capital preservation instruments, including investment grade, interest bearing instruments and U.S. government securities, until they are used for their stated purpose. We have not determined the amount of net proceeds to be used specifically for such purposes. As a result, management will retain broad discretion over the allocation of net proceeds.

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PLAN OF DISTRIBUTION

We may sell the securities from time to time pursuant to underwritten public offerings, negotiated transactions, block trades or a combination of these methods. We may sell the securities to or through underwriters or dealers, through agents, or directly to one or more purchasers. We may distribute securities from time to time in one or more transactions:

	·	at a fixed price or prices, which may be changed;
	·	at market prices prevailing at the time of sale;
	·	at prices related to such prevailing market prices; or
	·	at negotiated prices.

In addition, we may issue the securities as a dividend or distribution or in a subscription rights offering to our existing security holders.

We may directly solicit offers to purchase securities, or agents may be designated to solicit such offers. In the prospectus supplement relating to such offering, we will name any agent that could be viewed as an underwriter under the Securities Act and describe any commissions that we must pay to any such agent. Any such agent will be acting on a best efforts basis for the period of its appointment or, if indicated in the applicable prospectus supplement, on a firm commitment basis. This prospectus may be used in connection with any offering of our securities through any of these methods or other methods described in the applicable prospectus supplement.

A prospectus supplement or supplements (and any related free writing prospectus that we may authorize to be provided to you) will describe the terms of the offering of the securities, including, to the extent applicable:

	·	the name or names of the underwriters, if any;
	·	the purchase price of the securities or other consideration therefor, and the proceeds and use of proceeds, if any, we will receive from the sale;
	·	any public offering price;
	·	any over-allotment options under which underwriters may purchase additional securities from us;
	·	any agency fees or underwriting discounts and other items constituting agents’ or underwriters’ compensation;
	·	any discounts or commissions allowed or reallowed or paid to dealers; and
	·	any securities exchange or market on which the securities may be listed.

If any underwriters or agents are used in the sale of the securities in respect of which this prospectus is delivered, we will enter into an underwriting agreement, sales agreement or other agreement with them at the time of sale to them, and we will set forth in the prospectus supplement relating to such offering the names of the underwriters or agents and the terms of the related agreement with them.

In connection with the offering of securities, we may grant to the underwriters an option to purchase additional securities with an additional underwriting commission, as may be set forth in the accompanying prospectus supplement. If we grant any such option, the terms of such option will be set forth in the prospectus supplement for such securities.

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If a dealer is used in the sale of the securities in respect of which the prospectus is delivered, we will sell such securities to the dealer, as principal. The dealer, who may be deemed to be an “underwriter” as that term is defined in the Securities Act, may then resell such securities to the public at varying prices to be determined by such dealer at the time of resale.

If we offer securities in a subscription rights offering to our existing security holders, we may enter into a standby underwriting agreement with dealers, acting as standby underwriters. We may pay the standby underwriters a commitment fee for the securities they commit to purchase on a standby basis. If we do not enter into a standby underwriting arrangement, we may retain a dealer-manager to manage a subscription rights offering for us.

Agents, underwriters, dealers and other persons may be entitled under agreements which they may enter into with us to indemnification by us against certain civil liabilities, including liabilities under the Securities Act, and may be customers of, engage in transactions with or perform services for us in the ordinary course of business.

If so indicated in the applicable prospectus supplement, we will authorize underwriters or other persons acting as our agents to solicit offers by certain institutions to purchase securities from us pursuant to delayed delivery contracts providing for payment and delivery on the date stated in the prospectus supplement. Each contract will be for an amount not less than, and the aggregate amount of securities sold pursuant to such contracts shall not be less nor more than, the respective amounts stated in the prospectus supplement. Institutions with whom the contracts, when authorized, may be made include commercial and savings banks, insurance companies, pension funds, investment companies, educational and charitable institutions and other institutions, but shall in all cases be subject to our approval. Delayed delivery contracts will not be subject to any conditions except that:

	·	the purchase by an institution of the securities covered under that contract shall not at the time of delivery be prohibited under the laws of the jurisdiction to which that institution is subject; and

	·	if the securities are also being sold to underwriters acting as principals for their own account, the underwriters shall have purchased such securities not sold for delayed delivery. The underwriters and other persons acting as our agents will not have any responsibility in respect of the validity or performance of delayed delivery contracts.

Offered securities may also be offered and sold, if so indicated in the prospectus supplement, in connection with a remarketing upon their purchase, in accordance with a redemption or repayment pursuant to their terms, or otherwise, by one or more remarketing firms, acting as principals for their own accounts or as agents for us. Any remarketing firm will be identified and the terms of its agreement, if any, with us and its compensation will be described in the applicable prospectus supplement. Remarketing firms may be deemed to be underwriters in connection with their remarketing of offered securities.

Certain agents, underwriters and dealers, and their associates and affiliates, may be customers of, have borrowing relationships with, engage in other transactions with, or perform services, including investment banking services, for us or one or more of our respective affiliates in the ordinary course of business.

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In order to facilitate the offering of the securities, any underwriters may engage in transactions that stabilize, maintain or otherwise affect the price of the securities or any other securities the prices of which may be used to determine payments on such securities. Specifically, any underwriters may over allot in connection with the offering, creating a short position for their own accounts. In addition, to cover overallotments or to stabilize the price of the securities or of any such other securities, the underwriters may bid for, and purchase, the securities or any such other securities in the open market. Finally, in any offering of the securities through a syndicate of underwriters, the underwriting syndicate may reclaim selling concessions allowed to an underwriter or a dealer for distributing the securities in the offering if the syndicate repurchases previously distributed securities in transactions to cover syndicate short positions, in stabilization transactions or otherwise. Any of these activities may stabilize or maintain the market price of the securities above independent market levels. Any such underwriters are not required to engage in these activities and may end any of these activities at any time.

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, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement so indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us or borrowed from us or others to settle those sales or to close out any related open borrowings of stock, and may use securities received from us in settlement of those derivatives to close out any related open borrowings of stock. The third party in such sale transactions will be an underwriter and, if not identified in this prospectus, will be named in the applicable prospectus supplement (or a post-effective amendment). In addition, we may otherwise loan or pledge securities to a financial institution or other third party that in turn may sell the securities short using this prospectus and an applicable prospectus supplement. Such financial institution or other third party may transfer its economic short position to investors in our securities or in connection with a concurrent offering of other securities.

The securities may be new issues of securities and may have no established trading market. The securities may or may not be listed on a national securities exchange. We can make no assurance as to the liquidity of or the existence of trading markets for any of the securities that may be offered.

The specific terms of any lock-up provisions in respect of any given offering will be described in the applicable prospectus supplement.

The underwriters, dealers and agents may engage in transactions with us, or perform services for us, in the ordinary course of business for which they receive compensation.

The anticipated date of delivery of offered securities will be set forth in the applicable prospectus supplement relating to each offer.

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DESCRIPTION OF CAPITAL STOCK

The following description summarizes the material terms of our capital stock as of the date of this prospectus. Because it is only a summary, it does not contain all the information that may be important to you. For a complete description of our capital stock, you should refer to our Amended and Restated Certificate of Incorporation (the “Charter”) and our Fourth Amended and Restated Bylaws (the “Restated Bylaws”), which are included as exhibits to the registration statement of which this prospectus forms a part, and to the provisions of applicable Delaware law.

Authorized Capital Stock

We are authorized to issue 410,000,000 shares of our capital stock consisting of (a) 400,000,000 shares of common stock, par value $0.0001 per share (“Common Stock”), and (b) 10,000,000 shares of preferred stock, par value $0.0001 per share (“Preferred Stock”), consisting of (i) 4,818,654 shares of undesignated “blank check” preferred stock, par value $0.0001 per share, and (ii) 5,181,346 shares of Series A Preferred Stock, par value $0.0001 per share.

As of March 23, 2026, [_____] shares of our common stock were outstanding and held by [__] stockholders of record.

Common Stock

Our authorized but unissued shares of Common Stock are available for issuance without further action by our stockholders unless such action is required by applicable law or the rules of any securities exchange or automated quotation system on which our securities may be listed or traded. Holders of our Common Stock have the following rights and limitations:

	·	Voting Rights. The holders of our Common Stock are entitled to one vote for each share of Common Stock held on all matters submitted to a vote of the stockholders, including the election of directors. Our Charter and our Restated Bylaws do not provide for cumulative voting rights.

	·	Dividend Rights. The holders of outstanding shares of our Common Stock are entitled to receive ratably any dividends declared by our board of directors out of assets legally available for the payment of dividends, at the times and in the amounts as our board may from time to time determine.

	·	No Preemptive or Similar Rights. The holders of our Common Stock have no preemptive, conversion, or subscription rights, and there are no redemption or sinking fund provisions applicable to our Common Stock.

	·	Right to Receive Liquidation Distributions. In the event of our liquidation, dissolution or winding up, holders of Common Stock are entitled to receive, pro rata, our assets which are legally available for distribution, after payments of all debts and other liabilities and subject to the preferential rights, if any, on any outstanding shares of Preferred Stock and payment of other claims of creditors.

	·	Fully Paid and Non-Assessable. All of the outstanding shares of our Common Stock are fully paid and non-assessable.

	·	Potential Adverse Effect of Future Preferred Stock. The rights, preferences and privileges of the holders of Common Stock are subject to, and might be adversely affected by, the rights of the holders of shares of any series of our Preferred Stock that we may designate and issue in the future.

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Preferred Stock

Our board of directors has the authority, without further action by our stockholders, unless such action is required by applicable law or the rules of any securities exchange or automated quotation system on which our securities may be listed or traded, to issue up to 10,000,000 shares of Preferred Stock consisting of: (a) 4,818,654 shares of undesignated “blank check” Preferred Stock, par value $0.0001 per share, and (b) 5,181,346 shares of Series A Preferred Stock, par value $0.0001 per share. The “blank check” Preferred Stock may be issued in one or more series and our board of directors has the authority to fix the designations, powers, rights, preferences, qualifications, limitations and restrictions thereof. These designations, powers, rights and preferences could include voting rights, dividend rights, dissolution rights, conversion rights, exchange rights, redemption rights, liquidation preferences, and the number of shares constituting any series or the designation of such series, any or all of which may be greater than the rights of Common Stock. The issuance of Preferred Stock could adversely affect the voting power of holders of Common Stock and the likelihood that such holders will receive dividend payments and payments upon liquidation. In addition, the issuance of Preferred Stock could have the effect of delaying, deferring or preventing a change in our control or other corporate action.

We will incorporate by reference as an exhibit to the registration statement, which includes this prospectus, the form of any certificate of designation that describes the terms of the series of preferred stock we are offering. This description and the applicable prospectus supplement will include:

	·	the title and stated valued;

	·	the number of shares authorized;

	·	the liquidation preference per share;

	·	the purchase price;

	·	the dividend rate, period and payment date, and method of calculation for dividends;

	·	whether dividends will be cumulative or non-cumulative and, if cumulative, the date from which dividends will accumulate;

	·	the procedures for any auction and remarketing, if any;

	·	the provisions for a sinking fund, if any;

	·	the provisions for redemption or repurchase, if applicable, and any restrictions on our ability to exercise those redemption and repurchase rights;

	·	any listing of the preferred stock on any securities exchange or market;

	·	whether the preferred stock will be convertible into our common stock, and, if applicable, the conversion price, or how it will be calculated, and the conversion period;

	·	whether the preferred stock will be exchangeable into debt securities, and, if applicable, the exchange price, or how it will be calculated, and the exchange period;

	·	voting rights, if any, of the preferred stock;

	·	preemptive rights, if any;

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

	·	whether interests in the preferred stock will be represented by depositary shares;

	·	a discussion of any material United States federal income tax considerations applicable to the preferred stock;

	·	the relative ranking and preferences of the preferred stock as to dividend rights and rights if we liquidate, dissolve or wind up our affairs;

	·	any limitations on issuance of any class or series of preferred stock ranking senior to or on a parity with the series of preferred stock as to dividend rights and rights if we liquidate, dissolve or wind up our affairs; and

	·	any other specific terms, preferences, rights or limitations of, or restrictions on, the preferred stock.

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When we issue shares of preferred stock under this prospectus, the shares will fully be paid and nonassessable and will not be subject to any preemptive or similar rights.

Anti-Takeover effects of Delaware law and the Company’s Certificate of Incorporation and Bylaws

The provisions of Delaware law, our Charter, and our Restated Bylaws may have the effect of delaying, deferring, or discouraging another person from acquiring control of our Company.

Delaware Law

We are governed by the provisions of Section 203 of the Delaware General Corporation Law (“DGCL”). In general, Section 203 prohibits a public Delaware corporation from engaging in a “business combination” with an “interested stockholder” for a period of three years after the date of the transaction in which the person became an interested stockholder unless:

	·	prior to such time, the board of directors approved either the business combination or the transaction which resulted in the stockholder becoming an interested stockholder;

	·	upon consummation of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced, excluding shares owned by persons who are directors and also officers and by specified employee stock plans; or

	·	at or subsequent to the date of the transaction, the business combination is approved by the board of directors and authorized at an annual or special meeting of stockholders by the affirmative vote of at least 66 2/3% of the outstanding voting stock which is not owned by the interested stockholder.

A “business combination” includes mergers, asset sales or other transactions resulting in a financial benefit to the stockholder. In general, an “interested stockholder” is a person who, together with affiliates and associates, owns, or within three years did own, 15% or more of the corporation’s outstanding voting stock. These provisions may have the effect of delaying, deferring, or preventing a change in our control.

Charter and Restated Bylaw Provisions

Various provisions of our Charter and Restated Bylaws could deter hostile takeovers or delay or prevent changes in control of our management team, including the following:

	·	Undesignated Preferred Stock. The ability to authorize undesignated preferred stock makes it possible for our board of directors to issue one or more series of preferred stock with voting or other rights or preferences that could impede the success of any attempt to change control of our company.

	·	Removal of Directors and Filling of Vacancies. Our Restated Bylaws require the vote of stockholders representing not less than a majority of our issued and outstanding capital stock entitled to voting power in order to remove a director from office, with or without cause. In addition, vacancies on our board of directors (including vacancies created by the removal of directors) may be filled by a majority of the remaining directors, even if less than a quorum, or by a sole remaining director, and each director so appointed shall hold office until his or her successor is elected at an annual or a special meeting of our stockholders.

	·	Special Meeting of Stockholders. Our Restated Bylaws provide that a special meeting of stockholders may be called only by a majority of our board of directors, our president, the chairperson of our board or such other person as our board may designate, in each case, for the purpose specified in the notice of meeting. Our stockholders are not permitted to propose business to be brought before a special meeting of our stockholders.

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	·	Advance Notice Requirements. Our Restated Bylaws establish advance notice procedures with respect to stockholder proposals and the nomination of candidates for election as directors, other than nominations made by or at the direction of our board of directors or a committee of the board. These provisions may have the effect of deterring unsolicited offers to acquire our company or delaying stockholder actions, even if they are favored by the holders of a majority of our outstanding voting securities.

	·	No Cumulative Voting. Our Charter does not permit cumulative voting. Without cumulative voting, a minority stockholder may not be able to gain as many seats on our board of directors as the stockholder would be able to gain if cumulative voting were permitted. The absence of cumulative voting makes it more difficult for a minority stockholder to gain a seat on our board to influence our board’s decision regarding a takeover.

	·	Limitation on Liability of Directors and Officers. Our Charter provides that no director or officer of the Company shall be personally liable to the Company or its stockholders for monetary damages for breach of fiduciary duty, except, if required by DGCL, as amended from time to time, for liability (i) for any breach of the director's or officer's duty of loyalty to the Company or its stockholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) for a director under Section 174 of the DGCL, (iv) for any transaction from which the director or officer derived an improper personal benefit, or (v) for an officer, in any action by or in the right of the Company. Our Charter further provides that if the DGCL is amended to authorize corporate action further eliminating or limiting personal liability of directors or officers, such liability shall be eliminated or limited to the fullest extent permitted by the DGCL, as amended.

	·	Exclusive Forum Provision. Our Restated Bylaws state that, unless the Company otherwise consents in writing, any North Carolina state court that has jurisdiction, or the Delaware Court of Chancery shall, to the fullest extent permitted by law, be the sole and exclusive forum for any internal corporate claims, including without limitation: (1) any derivative action or proceeding brought on behalf of the Company, (2) any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of the Company to the Company or the Company’s shareholders, (3) any action asserting a claim arising pursuant to any provision of DGCL, and (4) any action asserting a claim governed by the internal affairs doctrine, in each case subject to said court having personal jurisdiction over the indispensable parties named as defendants therein. This provision would not apply to suits brought to enforce a liability created by the Exchange Act or the Securities Act, or any other claim for which federal courts have exclusive jurisdiction. The exclusive forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with the Company or its directors, officers or other employees or be cost-prohibitive to stockholders, which may discourage such lawsuits against the Company and its directors, officers and other employees.

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is Equiniti Trust Company, LLC.

Listing on the Nasdaq Capital Market

Our Common Stock is listed on the Nasdaq Capital Market under the symbol “TENX”.

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DESCRIPTION OF WARRANTS

The following description, together with the additional information we may include in any applicable prospectus supplement, summarizes the material terms and provisions of the warrants that we may offer under this prospectus and any related warrant agreement and warrant certificate. While the terms summarized below will apply generally to any warrants that we may offer, we will describe the specific terms of any series of warrants in more detail in the applicable prospectus supplement. The terms of any warrants offered under that prospectus supplement may differ from the terms described below. Specific warrant agreements will contain additional important terms and provisions as follows and will be filed, along with a form of warrant certificate, 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 specific designation and aggregate number of, and the price at which we will issue, the warrants;

	·	the currency or currency units in which the offering price, if any, and the exercise price are payable;

	·	if applicable, the exercise price for shares of our common stock or preferred stock and the number of shares of common stock or preferred stock to be received upon exercise of the warrants;

	·	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;

	·	the date on which the right to exercise the warrants will begin and the date on which that right will expire or, if warrant holders may not continuously exercise the warrants throughout that period, the specific date or dates on which the warrant holders may exercise the warrants;

	·	whether the warrants will be issued in fully registered form or bearer form, in definitive or global form or in any combination of these forms, although, in any case, the form of a warrant included in a unit will correspond to the form of the unit and of any security included in that unit;

	·	the identity of the warrant agent for the warrants and of any other depositaries, execution or paying agents, transfer agents, registrars or other agents;

	·	the proposed listing, if any, of the warrants or the common stock issuable upon exercise of the warrants on any securities exchange;

	·	if applicable, the date from and after which the warrants and the common stock or preferred stock will be separately transferable;

	·	if applicable, the minimum or maximum amount of the warrants that may be exercised at any one time;

	·	information with respect to book-entry procedures, if any;

	·	the anti-dilution provisions of the warrants, if any;

	·	the redemption or call provisions, if any;

	·	whether the warrants are to be sold separately or with other securities as parts of units; and

	·	any additional terms of the warrants, including terms, procedures and limitations relating to the exchange and exercise of the warrants.

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

	·	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

	·	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.

Each warrant will entitle the holder of the warrant to purchase for cash, or, if applicable, via net exercise, an amount of securities at the exercise price set forth in the applicable prospectus supplement. Holders may exercise warrants at any time up to the close of business on the expiration date set forth in the applicable prospectus supplement. After the close of business on the expiration date, unexercised warrants will be void.

The transfer agent and registrar, if any, for any warrants will be set forth in the applicable prospectus supplement.

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DESCRIPTION OF DEBT SECURITIES

The following description, together with the additional information we include in any applicable prospectus supplement, summarizes the material terms and provisions of any debt securities that we may offer under this prospectus. While the terms we have summarized below will apply generally to any future debt securities we offer, we will describe the particular terms of any debt securities that we may offer in more detail in the applicable prospectus supplement. The terms of any debt securities we may offer under a prospectus supplement may differ from the terms described below. For any debt securities that we offer, an indenture (and any relevant supplemental indenture), if required, will contain additional important terms and provisions, the form of which we filed as an exhibit to the registration statement of which this prospectus is a part and is incorporated herein by reference. We will file any definitive indenture as an exhibit to reports that we file with the SEC and incorporate by reference in this prospectus and the applicable prospectus supplement. Any indenture would be qualified under the Trust Indenture Act of 1939, as amended.

With respect to any debt securities that we issue, we will describe in each prospectus supplement the following terms relating to a series of debt securities:

	·	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 depository will be;

	·	the maturity date;

	·	the principal amount due at maturity;

	·	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 convertible into shares of our common stock or our preferred stock and, if so, the terms of such conversion;

	·	whether or not the debt securities will be secured or unsecured by some or all of our assets, and the terms of any secured debt;

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

	·	the place where payments will be payable;

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

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

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	·	the date, if any, after which and the conditions upon 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;

	·	the date, if any, on which, and the price at which we are obligated, pursuant to any mandatory sinking fund or analogous fund provisions 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 to pay dividends, or will require us to maintain any asset ratios or reserves;

	·	whether we will be restricted from incurring any additional indebtedness, issuing additional securities, or entering into a merger, consolidation or sale of our business;

	·	information describing any book-entry features;

	·	any provisions for payment of additional amounts for taxes;

	·	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;

	·	events of default;

	·	whether we and/or the indenture trustee may change an indenture without the consent of any holders;

	·	the form of debt security and how it may be exchanged and transferred;

	·	description of the indenture trustee and paying agent, and the method of payments; and

	·	any other specified terms, preferences, rights or limitations of, or restrictions on, the debt securities and any terms that may be required by us or advisable under applicable laws or regulations.

We summarize below the material terms of the form of indenture, if required, or indicate which material terms will be described in the applicable prospectus supplement. The indenture:

	·	does not limit the amount of debt securities that we may issue;

	·	allows us to issue debt securities in one or more series;

	·	does not require us to issue all of the debt securities of a series at the same time;

	·	allows us to reopen a series to issue additional debt securities without the consent of the holders of the debt securities of such series; and

	·	provides that the debt securities may be secured or unsecured, as may be set forth in the applicable prospectus supplement.

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DESCRIPTION OF THE UNITS

We may issue units comprised of shares of common stock, shares of preferred stock, debt securities, warrants, or rights in any combination. We may issue units in such amounts and in as many distinct series as we wish. This section outlines certain provisions of the units that we may issue. If we issue units, they may be issued under one or more unit agreements to be entered into between us and a bank or other financial institution, as unit agent. The information described in this section may not be complete in all respects and is qualified entirely by reference to the unit agreement with respect to the units of any particular series. The specific terms of any series of units offered will be described in the applicable prospectus supplement. If so described in a particular supplement, the specific terms of any series of units may differ from the general description of terms presented below. We urge you to read any prospectus supplement related to any series of units we may offer, as well as the complete unit agreement and unit certificate that contain the terms of the units. If we issue units, forms of unit agreements and unit certificates relating to such units will be incorporated by reference as exhibits to the registration statement, which includes this prospectus.

Each unit that we may issue 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. The applicable prospectus supplement may describe:

	·	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;

	·	any provisions of the governing unit agreement;

	·	the price or prices at which such units will be issued;

	·	the applicable United States federal income tax considerations relating to the units;

	·	any provisions for the issuance, payment, settlement, transfer or exchange of the units or of the securities comprising the units; and

	·	any other terms of the units and 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,” “Description of Warrants” and “Description of Rights” will apply to the securities included in each unit, to the extent relevant and as may be updated in any prospectus supplements.

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DESCRIPTION OF THE RIGHTS

The following is a general description of the terms of the rights we may issue from time to time unless we provide otherwise in the applicable prospectus supplement. Particular terms of any rights we offer will be described in the prospectus supplement relating to such rights.

General

We may issue rights to purchase common stock, preferred stock, debt securities or units. Rights may be issued independently or together with other securities and may or may not be transferable by the person purchasing or receiving the rights. In connection with any rights offering to our stockholders, we may enter into a standby underwriting, backstop or other arrangement with one or more underwriters or other persons pursuant to which such underwriters or other persons would purchase any offered securities remaining unsubscribed after such rights offering. In connection with a rights offering to our stockholders, we would distribute certificates evidencing the rights and a prospectus supplement to our stockholders on or about the record date that we set for receiving rights in such rights offering.

The applicable prospectus supplement will describe the following terms of any rights we may issue, including some or all of the following:

	·	the title and aggregate number of the rights;

	·	the subscription price or a formula for the determination of the subscription price for the rights and the currency or currencies in which the subscription price may be payable;

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

	·	the number or a formula for the determination of the number of the rights issued to each stockholder;

	·	the extent to which the rights are transferable;

	·	in the case of rights to purchase debt securities, the principal amount of debt securities purchasable upon exercise of one right;

	·	in the case of rights to purchase common stock or preferred stock, the type of stock and number of shares of stock purchasable upon exercise of one right;

	·	in the case of rights to purchase units, the type and number of securities comprising the units, and the number of units purchasable upon exercise of one right;

	·	the date on which the right to exercise the rights will commence, and the date on which the rights will expire (subject to any extension);

	·	if applicable, the minimum or maximum amount of the rights that may be exercised at any one time;

	·	the extent to which such rights include an over-subscription privilege with respect to unsubscribed securities;

	·	if applicable, the procedures for adjusting the subscription price and number of shares of common stock or preferred stock purchasable upon the exercise of each right upon the occurrence of certain events, including stock splits, reverse stock splits, combinations, subdivisions or reclassifications of common stock or preferred stock;

	·	the effect on the rights of any merger, consolidation, sale or other disposition of our business;

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

	·	information with respect to book-entry procedures, if any;

	·	the terms of the securities issuable upon exercise of the rights;

	·	if applicable, the material terms of any standby underwriting, backstop or other purchase arrangement that we may enter into in connection with the rights offering;

	·	if applicable, a discussion of material U.S. federal income tax considerations; and

	·	any other terms of the rights, including terms, procedures and limitations relating to the exchange and exercise of the rights.

We will file as exhibits to the registration statement of which this prospectus is a part, or will incorporate by reference from reports that we file with the SEC, the form of rights agreement and rights certificate that describe the terms of the rights we are offering before the issuance of rights.

Exercise of Rights

Each right will entitle the holder to purchase for cash or other consideration such shares of stock or principal amount of securities at the subscription price as shall in each case be set forth in, or be determinable as set forth in, the prospectus supplement relating to the rights offered thereby. Rights may be exercised as set forth in the applicable prospectus supplement beginning on the date specified therein and continuing until the close of business on the expiration date set forth in the prospectus supplement relating to the rights offered thereby. After the close of business on the expiration date, unexercised rights will become void.

Upon receipt of payment and a rights certificate properly completed and duly executed at the corporate trust office of the subscription agent or any other office indicated in the prospectus supplement, we will, as soon as practicable, forward the securities purchased upon such exercise. If less than all of the rights represented by such subscription certificate are exercised, a new subscription certificate will be issued for the remaining rights. If we so indicate in the applicable prospectus supplement, holders of the rights may surrender securities as all or part of the exercise price for rights.

We may determine to offer any unsubscribed offered securities directly to stockholders, to persons other than stockholders, to or through agents, underwriters or dealers or through a combination of such methods, including pursuant to standby underwriting, backstop or other arrangements, as described in the applicable prospectus supplement.

Prior to exercising their rights, holders of rights will not have any of the rights of holders of the securities purchasable upon subscription, including, in the case of rights 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 any voting rights or, in the case of rights to purchase debt securities, the right to receive principal, premium, if any, or interest payments, on the debt securities purchasable upon exercise or to enforce covenants in the applicable indenture.

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LEGAL MATTERS

The validity of the securities being offered hereby will be passed upon for us by Wyrick Robbins Yates & Ponton LLP, Raleigh, North Carolina.

EXPERTS

The historical consolidated financial statements of our Company as of December 31, 2025 and 2024 and for each of the two years in the period ended December 31, 2025 included in this prospectus and in the registration statement have been so included in reliance on the report of Cherry Bekaert LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

WHERE YOU CAN FIND ADDITIONAL INFORMATION

We file annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC maintains a website at www.sec.gov that contains reports, proxy and information statements and other information regarding registrants. Our SEC filings, including our registration statement of which this prospectus is a part and the exhibits and schedules thereto, are available on the SEC website at www.sec.gov.

We also maintain a website at www.tenaxthera.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. Information contained in or accessible through our website does not constitute a part of this prospectus. You may also request a copy of these filings, at no cost, by writing or telephoning us at: 101 Glen Lennox Drive, Suite 300, Chapel Hill, North Carolina 27517, (919) 855-2100.

INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

The SEC allows us to “incorporate by reference” information into this prospectus, which means that we can disclose important information to you by referring you to another document filed separately with the SEC. The documents incorporated by reference into this prospectus contain important information that you should read about us. Because we are incorporating by reference future filings with the SEC, this prospectus is continually updated and those future filings may modify or supersede some of the information included or incorporated in this prospectus. This means that you must look at all of the SEC filings that we incorporate by reference to determine if any of the statements in this prospectus or in any document previously incorporated by reference have been modified or superseded.

The following documents are incorporated by reference into this document:

	·	our Annual Report on Form 10-K for the fiscal year ended December 31, 2025, as filed with the SEC on March 10, 2026;

	·	our Current Report on Form 8-K filed with the SEC on January 9, 2026; and

	·	the description of our common stock filed with the SEC on March 10, 2026 as Exhibit 4.16 to our Annual Report on Form 10-K for the fiscal year ended December 31, 2025.

We also incorporate by reference into this prospectus 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 prior to the termination of the offering. 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.

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

We will furnish without charge to you, on written or oral request, a copy of any or all of the documents incorporated by reference in this prospectus, including exhibits to these documents. You should direct any requests for documents to Tenax Therapeutics, Inc., 101 Glen Lennox Drive, Suite 300, Chapel Hill, North Carolina 27517; Telephone: (919) 855-2100.

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$300,000,000

Common stock

Preferred Stock

Debt Securities

Warrants

Units and/or

Rights

PRELIMINARY PROSPECTUS

, 2026

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PART II

INFORMATION NOT REQUIRED IN THE PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution.

The following table sets forth an itemization of the various expenses, all of which we will pay, in connection with the issuance and distribution of the securities being registered. The selling stockholder will not be responsible for any of the expenses of this offering. All of the amounts shown are estimated except the SEC registration fee.

SEC registration fee	$	41,430
Legal fees and expenses	$	*
Accounting fees and expenses	$	*
Printing expenses	$	*
Total	$	*

* These expenses are not presently known and cannot be estimated. The applicable prospectus supplement will set forth the aggregate amount of expenses payable in respect of any offering of securities.

Item 15. Indemnification of Directors and Officers.

Section 145 of the Delaware General Corporation Law (“DGCL”) provides that a corporation has the power to indemnify a director, officer, employee, or agent of the corporation and certain other persons serving at the request of the corporation in related capacities against amounts paid and expenses incurred in connection with an action or proceeding to which he or she is or is threatened to be made a party by reason of such position, if such person acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the corporation, and, in any criminal proceeding, if such person had no reasonable cause to believe his or her conduct was unlawful. In the case of actions brought by or in the right of the corporation, no indemnification shall be made with respect to any matter as to which such person has been adjudged to be liable to the corporation unless and only to the extent that the adjudicating court determines that such indemnification is proper under the circumstances.

Our Amended and Restated Certificate of Incorporation (the “Certificate of Incorporation”), and our Fourth Amended and Restated Bylaws (the “Bylaws”), provide that our directors and officers will be indemnified by us to the fullest extent authorized by the DGCL. In addition, our Certificate of Incorporation provides, as permitted by Section 102(b)(7) of DGCL, that our directors and officers will not be liable for monetary damages to us for breaches of their fiduciary duty as directors or officers, respectively, unless they (i) violated their duty of loyalty to us or our stockholders, (ii) acted, or failed to act, in good faith, (iii) acted with intentional misconduct, (iv) knowingly or intentionally violated the law, (v) authorized unlawful payments of dividends, unlawful stock purchases or unlawful redemptions, (vi) derived an improper personal benefit from their actions as directors, or (v) for an officer, in any action by or in the right of our Company.

Our Bylaws also permit us to secure insurance on behalf of any officer, director, employee, or agent for any liability arising out of his or her actions, regardless of whether DGCL would permit indemnification. We have purchased a policy of directors’ and officers’ liability insurance that insures our directors and officers.

In addition, we have also entered into an indemnification agreement with certain of our directors and officers. The indemnification agreements require us to indemnify and hold harmless and advance expenses to each indemnitee in respect of acts or omissions occurring prior to the time the indemnitee ceases to be an officer and/or director of the Company to the fullest extent permitted by applicable law. The rights provided in the indemnification agreements are in addition to the rights provided in our Certificate of Incorporation, Bylaws, and the DGCL.

The indemnification rights set forth above shall not be exclusive of any other right which an indemnified person may have or hereafter acquire under any statute, provision of our Certificate of Incorporation, our Bylaws, or any agreement, vote of stockholders or disinterested directors or otherwise.

We maintain standard policies of insurance that provide coverage (1) to our directors and officers against loss rising from claims made by reason of breach of duty or other wrongful act and (2) to us with respect to indemnification payments that we may make to such directors and officers.

See “Item 17. Undertakings” for a description of the SEC’s position regarding such indemnification provisions.

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Item 16. Exhibits and Financial Statement Schedules.

(a) Exhibits.

Incorporated by Reference (Unless Otherwise Indicated)
Exhibit Number	Exhibit Title	Form	File	Exhibit	Filing Date

1.1*	Form of Underwriting Agreement.	--	--	--	--

2.1	Asset Purchase Agreement by and between Oxygen Biotherapeutics, Inc., Life Newco, Inc., Phyxius Pharma, Inc., and the stockholders of Phyxius Pharma, Inc. dated October 21, 2013.	8-K	001-34600	2.1	October 25, 2013

2.2	Agreement and Plan of Merger among PHPrecisionMed Inc., Tenax Therapeutics, Inc., Life Newco II, Inc., and Dr. Stuart Rich dated January 15, 2021.	8-K	001-34600	2.1	January 19, 2021

3.1	Amended and Restated Certificate of Incorporation, effective June 16, 2025.	8-K	001-34600	3.2	June 17, 2025

3.2	Certificate of Designation of Series A Convertible Preferred Stock, dated December 10, 2018.	8-K	001-34600	4.1	December 11, 2018

3.3	Fourth Amended and Restated Bylaws.	10-Q	001-34600	3.1	August 15, 2023

4.1	Form of Unregistered Warrant, dated March 13, 2020.	8-K	001-34600	4.2	March 13, 2020

4.2	Form of Placement Agent Warrant, dated March 13, 2020.	8-K	001-34600	4.3	March 13, 2020

4.3	Form of Unregistered Warrant, dated July 6, 2020.	8-K	001-34600	4.2	July 8, 2020

4.4	Form of Placement Agent Warrant, dated July 8, 2020.	8-K	001-34600	4.3	July 8, 2020

4.5	Form of Unregistered Warrant, dated July 6, 2021.	8-K	001-34600	4.2	July 8, 2021

4.6	Form of HCW Warrant, dated July 6, 2021.	8-K	001-34600	4.3	July 8, 2021

4.7	Form of Common Stock Warrant, dated May 19, 2022.	8-K	001-34600	4.2	May 20, 2022

4.8	Warrant Amendment Agreement, dated as of May 17, 2022, by and between the Company and the Investor.	8-K	001-34600	4.3	May 20, 2022

4.9	Warrant Agency Agreement, dated February 3, 2023, by and between Tenax Therapeutics, Inc. and Direct Transfer LLC.	8-K	001-34600	4.1	February 7, 2023

4.10	Form of Common Stock Purchase Warrant, dated February 3, 2023.	8-K	001-34600	4.3	February 7, 2023

4.11	Warrant Agency Agreement, dated February 12, 2024, by and between Tenax Therapeutics, Inc. and Direct Transfer LLC.	8-K	001-34600	4.1	February 12, 2024

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4.12	Form of Common Stock Purchase Warrant, dated February 12, 2024.	8-K	001-34600	4.3	February 12, 2024

4.13	Form of Pre-Funded Warrant to Purchase Common Stock, dated August 8, 2024.	8-K	001-34600	4.1	August 6, 2024

4.14	Form of Warrant to Purchase Shares of Common Stock or Pre-Funded Warrants, dated August 8, 2024.	8-K	001-34600	4.2	August 6, 2024

4.15	Form of Pre-Funded Warrant to Purchase Common Stock, dated March 5, 2025.	8-K	001-34600	4.1	March 6, 2025

4.16	Description of Common Stock.	10-K	001-34600	4.16	March 10, 2026

4.17*	Form of Certificate of Designations.	--	--	--	--

4.18	Form of Indenture, between the Registrant and one or more trustees to be named.	--	--	--	Filed herewith.

4.19*	Form of Note.	--	--	--	--

4.20*	Form of Common Stock Warrant Agreement and Warrant Certificate.	--	--	--	--

4.21*	Form of Preferred Stock Warrant Agreement and Warrant Certificate.	--	--	--	--

4.22*	Form of Debt Securities Warrant Agreement and Warrant Certificate.	--	--	--	--

4.23*	Form of Unit Agreement and Unit Certificate.	--	--	--	--

4.24*	Form of Rights Agreement and Rights Certificate.	--	--	--	--

5.1	Opinion of Wyrick Robbins Yates & Ponton LLP.	--	--	--	Filed herewith.

23.1	Consent of Cherry Bekaert LLP, Independent Registered Public Accounting Firm.	--	--	--	Filed herewith.

23.2	Consent of Wyrick Robbins Yates & Ponton LLP (included in Exhibit 5.1).	--	--	--	Filed herewith.

24.1	Power of Attorney (included on signature page to this Registration Statement on Form S-3).	--	--	--	Filed herewith.

25.1**	Statement of Eligibility of Trustee under the Indenture.	--	--	--	--

107	Filing Fee Table.	--	--	--	Filed herewith.

* To be filed, if necessary, by amendment or by a report filed under the Exchange Act and incorporated herein by reference, if applicable.

** To be filed pursuant to Section 305(b)(2) of the Trust Indenture Act of 1939, as amended.

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Item 17. Undertakings.

The undersigned registrant hereby undertakes:

(a)

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Securities and Exchange Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20 percent change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;

provided, however, that paragraphs (l)(i), (l)(ii) and (l)(iii) of this section do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Securities and Exchange Commission by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement;

(2) That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof;

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering;

(5) That, for the purpose of determining liability under the Securities Act of 1933 to any purchaser:

(i) Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

(ii) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(l)(i), (vii), or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act of 1933 shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof; provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date;

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(6) That, for the purpose of determining liability of the registrant under the Securities Act of 1933 to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(i) Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii) Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;

(iii) The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

(iv) Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser;

(b) That, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof;

(h) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act of 1933 and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act of 1933 and will be governed by the final adjudication of such issue;

(i)

(1) That, for purposes of determining any liability under the Securities Act of 1933, the information omitted from the form of prospectus filed as part of this registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities Act of 1933 shall be deemed to be part of this registration statement as of the time it was declared effective;

(2) That, for the purpose of determining any liability under the Securities Act of 1933, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof; and

(j) To file an application for the purpose of determining the eligibility of the trustee to act under subsection (a) of Section 310 of the Trust Indenture Act of 1939 in accordance with the rules and regulations prescribed by the Securities and Exchange Commission under Section 305(b)(2) of the Trust Indenture Act of 1939.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the Town of Chapel Hill, State of North Carolina, on the 24th day of March, 2026.

	TENAX THERAPEUTICS, INC.

	By:	/s/ Christopher T. Giordano
	Name:	Christopher T. Giordano
	Title:	President and Chief Executive Officer

KNOW ALL PERSONS BY THESE PRESENTS that each individual whose signature appears below constitutes and appoints Christopher T. Giordano and Gerald Proehl, and each of them as his or her true and lawful attorney-in-fact and agent with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement, and to file the same, with all exhibits thereto, and all documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitute, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, the following persons in the capacities and on the dates indicated have signed this registration statement below.

Signature	Title	Date

/s/ Christopher T. Giordano	President and Chief Executive Officer and Director	March 24, 2026
Christopher T. Giordano	(Principal Executive Officer)

/s/ Thomas A. McGauley	Interim Chief Financial Officer	March 24, 2026
Thomas A. McGauley	(Principal Financial Officer and Principal Accounting Officer)

/s/ Gerald Proehl	Chairman of the Board and Director	March 24, 2026
Gerald Proehl

/s/ June Almenoff, MD	Director	March 24, 2026
June Almenoff, MD

/s/ Michael Davidson, MD	Director	March 24, 2026
Michael Davidson, MD

/s/ Declan Doogan, MD	Director	March 24, 2026
Declan Doogan, MD

/s/ Robyn Hunter	Director	March 24, 2026
Robyn Hunter

/s/ Stuart Rich, MD	Director	March 24, 2026
Stuart Rich, MD

SEC Form S-3 filed by Tenax Therapeutics Inc.