S-3 1 forms-3.htm S-3

As filed with the Securities and Exchange Commission on April 23, 2026

Registration No. 333-____

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

COCRYSTAL PHARMA, INC.

(Exact name of registrant as specified in its charter)

Delaware

2834

35-2528215

(State or other jurisdiction of

incorporation or organization)

(Primary Standard Industrial

Classification Code Number)

(I.R.S. Employer

Identification No.)

19805 N. Creek Parkway

Bothell, WA 98011

(877) 262-7123

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

James Martin

4400 Biscayne Boulevard

Miami, FL 33137

(877) 262-7123

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

Copies to:

Michael D. Harris, Esq.

Nason, Yeager, Gerson, Harris & Fumero, P.A.

3001 PGA Blvd., Suite 305

Palm Beach Gardens, Florida 33410

(561) 686-3307

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 offering 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, 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.

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

If an emerging growth company, indicate by checkmark 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 the 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 which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 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.

EXPLANATORY NOTE

Pursuant to Rule 415(a)(5) under the Securities Act of 1933 (the “Securities Act”), Cocrystal Pharma, Inc. (the “Company”) intends to continue to offer and sell securities under the Company’s registration statement on Form S-3 (File No. 333-271883) originally filed on May 12, 2023 and declared effective on May 26, 2023 (the “Prior Registration Statement”), until the earlier of (i) the date on which the registration statement of which this prospectus forms a part (this “Registration Statement”) is declared effective by the Securities and Exchange Commission, and (ii) November 22, 2026, which is 180 days after the third-year anniversary of the effective date of the Prior Registration Statement (the “Expiration Date”). Until the Expiration Date, the Company may continue to use the Prior Registration Statement and related prospectus supplements for offerings thereunder. The Prior Registration Statement and all offers and sales thereunder will be deemed terminated on the Expiration Date, except to the extent covered by this Registration Statement.

Pursuant to Rule 415(a)(6) under the Securities Act, this Registration Statement includes unsold securities under the Prior Registration Statement, in addition to new securities being registered on this Registration Statement. Pursuant to Rule 415(a)(6), on or before the Expiration Date, the Company may file a pre-effective amendment to this Registration Statement to update the amount of unsold securities previously registered by the Prior Registration Statement being registered hereby, and continue to offer and sell such unsold securities under this Registration Statement, if and when a new prospectus supplement is filed with the SEC. If applicable, such pre-effective amendment shall identify such unsold securities to be included in this Registration Statement, and the amount of any new securities to be registered on this Registration Statement.

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 Securities and Exchange Commission of which this prospectus is a part becomes effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

Subject to Completion, dated April 23, 2026

PROSPECTUS

$150,000,000

Cocrystal Pharma, Inc.

Common Stock

Preferred Stock

Warrants

Units

Cocrystal Pharma, Inc. (“Cocrystal,” the “Company,” “we,” “our,” or “us”) intends to offer and sell from time to time the securities described in this prospectus. The total offering price of the securities described in this prospectus will not exceed a total of $150,000,000.

This prospectus describes some of the general terms that apply to the securities. We will provide specific terms of any securities we may offer in supplements to this prospectus. You should read this prospectus and any applicable prospectus supplement carefully before you invest in our securities. We also may authorize one or more free writing prospectuses to be provided to you in connection with the offering. The prospectus supplement and any free writing prospectus also may add, update or change information contained or incorporated in this prospectus.

We may offer and sell these securities to or through one or more underwriters, brokers or agents, or directly to purchasers on a continuous or delayed basis. The prospectus supplement for each offering of securities will describe the plan of distribution for that offering. For general information about the distribution of securities offered, see “Plan of Distribution” in this prospectus. The prospectus supplement also will set forth the price to the public of the securities and the net proceeds that we expect to receive from the sale of such securities.

Our common stock is traded on The Nasdaq Capital Market under the symbol “COCP.” On April 20, 2026, the last reported sales price of our common stock on The Nasdaq Capital Market was $1.51 per share, 10,378,056 shares of our outstanding common stock were held by non-affiliates (our “public float”), and the aggregate market value of our public float based on the aforementioned price was $15,670,864. Pursuant to General Instruction I.B.6 of Form S-3, in no event will we sell securities registered on this Registration Statement in a public primary offering for an aggregate offering amount exceeding one-third of our public float in any 12-month period so long as our public float remains below $75 million, in each case calculated in accordance with such instruction. If the aggregate market value of our common stock computed pursuant to such instruction equals or exceeds $75 million subsequent to the effective date of this Registration Statement, then the one-third limitation on sales specified therein shall not apply to additional sales made pursuant to this Registration Statement on or subsequent to such date, and instead this Registration Statement shall be considered filed pursuant to General Instruction I.B.1. of Form S-3.

Investing in our securities involves risks. You should read carefully and consider “Risk Factors” included in our most recent Annual Report on Form 10-K and on page 2 of this prospectus and in the applicable prospectus supplement before investing in our securities.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined whether this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is _________, 2026

TABLE OF CONTENTS

		Page

PROSPECTUS SUMMARY		1

CAUTIONARY NOTE REGARDING FORWARD LOOKING STATEMENTS		1

RISK FACTORS		2

USE OF PROCEEDS		2

DESCRIPTION OF CAPITAL STOCK		2

DESCRIPTION OF WARRANTS		3

DESCRIPTION OF UNITS		4

CERTAIN PROVISIONS OF DELAWARE LAW AND OF OUR CHARTER AND BYLAWS		5

PLAN OF DISTRIBUTION		8

LEGAL MATTERS		11

EXPERTS		11

INCORPORATION OF CERTAIN INFORMATION BY REFERENCE		11

You should rely only on information contained in this prospectus. We have not authorized anyone to provide you with information that is different from that contained in this prospectus. We are not offering to sell or seeking offers to buy shares of common stock or other securities in jurisdictions where offers and sales are not permitted. The information contained in this prospectus is accurate only as of the date of this prospectus, regardless of the time of delivery of this prospectus or of any sale of our common stock or other securities. We are responsible for updating this prospectus to ensure that all material information is included and will update this prospectus to the extent required by law.

iii

PROSPECTUS SUMMARY

This summary only highlights the more detailed information appearing elsewhere in this prospectus or incorporated by reference in this prospectus. It may not contain all of the information that is important to you. You should carefully read the entire prospectus and the documents incorporated by reference in this prospectus before deciding whether to invest in our securities. Unless otherwise indicated or the context requires otherwise, in this prospectus and any prospectus supplement hereto references to “Cocrystal,” “we,” “us,” and “our” refer to Cocrystal Pharma, Inc. and its consolidated subsidiaries.

About This Prospectus

This prospectus is part of a “shelf” registration statement that we have filed with the Securities and Exchange Commission (the “SEC”). By using a shelf registration statement, we may sell, at any time and from time to time, in one or more offerings, any combination of the securities described in this prospectus. The exhibits to our registration statement contain the full text of certain contracts and other important documents we have summarized in this prospectus. Since these summaries may not contain all the information that you may find important in deciding whether to purchase the securities we offer, you should review the full text of these documents. The registration statement and the exhibits can be obtained from the SEC as indicated under the section entitled “Incorporation of Certain Information by Reference.”

This prospectus only provides you with a general description of the securities we may offer. Each time we sell securities, we will provide a prospectus supplement that contains specific information about the terms of those securities. The prospectus supplement also may add, update or change information contained in this prospectus. If there is an inconsistency between the information in this prospectus and any prospectus supplement, you should rely on the information in the prospectus supplement. You should read carefully both this prospectus and any prospectus supplement together with the additional information described below under the section entitled “Incorporation of Certain Information by Reference.”

We are not making an offer of these securities in any jurisdiction where the offer is not permitted. You should not assume that the information in this prospectus or a prospectus supplement is accurate as of any date other than the date on the front of the document.

Our Company

Cocrystal Pharma, Inc. is a clinical-stage biotechnology company discovering and developing novel antiviral therapeutics as treatments for serious and/or chronic viral diseases. We employ unique structure-based technologies and Nobel Prize winning expertise with the goal of creating viable antiviral drugs. These technologies are designed to efficiently deliver small molecule therapeutics that are safe, effective, and convenient to administer. We have identified promising discovery, preclinical and clinical stage antiviral compounds for unmet medical needs caused by RNA viruses including influenza virus, norovirus, coronaviruses (including SARS-CoV-2 & MERS-CoV), respiratory virus infections and hepatitis C virus infections.

Corporate Information

Our principal executive offices are located at 19805 N. Creek Parkway, Bothell, WA 98011 and our telephone number is (877) 262-7123. Our Internet website address is www.cocrystalpharma.com. The information on our website is not incorporated into this prospectus.

CAUTIONARY NOTE REGARDING FORWARD LOOKING STATEMENTS

This prospectus including the documents incorporated by reference contains forward-looking statements. All statements other than statements of historical facts, including statements regarding our future financial position, liquidity, business strategy and plans and objectives of management for future operations, are forward-looking statements. The words “believe,” “may,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “could,” “target,” “potential,” “is likely,” “will,” “expect” and similar expressions, as they relate to us, are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs.

The results anticipated by any or all of these forward-looking statements might not occur. Important factors, uncertainties and risks that may cause actual results to differ materially from these forward-looking statements are contained in the risk factors that follow and elsewhere in this prospectus and the incorporated documents. We undertake no obligation to publicly update or revise any forward-looking statements, whether as the result of new information, future events or otherwise. For more information regarding some of the ongoing risks and uncertainties of our business, see the risk factors that follow and or that are disclosed in our incorporated documents.

RISK FACTORS

Investing in our securities involves risks. Before purchasing the securities offered by this prospectus you should consider carefully the risk factors incorporated by reference in this prospectus from our Annual Report on Form 10-K for the year ended December 31, 2025 filed with the SEC on March 31, 2026, as well as the risks, uncertainties and additional information (i) set forth in our reports on Forms 10-K, 10-Q and 8-K and in the other documents incorporated by reference in this prospectus that we file with the SEC after the date of this prospectus and which are deemed incorporated by reference in this prospectus, and (ii) the information contained in any applicable prospectus supplement. For a description of these reports and documents, and information about where you can find them, see “Incorporation of Certain Information by Reference.” The risks and uncertainties we discuss in this prospectus and in the documents incorporated by reference in this prospectus are those that we currently believe may materially affect our company. Additional risks not presently known, or currently deemed immaterial, also could materially and adversely affect our financial condition, results of operations, business and prospects.

USE OF PROCEEDS

Unless we specify otherwise in an accompanying prospectus supplement, we intend to use the net proceeds from the sale of the securities by us to provide additional funds for working capital and other general corporate purposes. Any specific allocation of the net proceeds of an offering of securities will be determined at the time of such offering and will be described in the accompanying supplement to this prospectus.

DESCRIPTION OF CAPITAL STOCK

We are authorized to issue 100,000,000 shares of common stock, par value $0.001 per share, and 1,000,000 shares of preferred stock, par value $0.001 per share.

Common Stock

We are authorized to issue 100,000,000 shares of common stock, par value $0.001 per share. The holders of common stock are entitled to one vote per share on all matters submitted to a vote of shareholders, including the election of directors. There is no cumulative voting in the election of directors. In the event of our liquidation or dissolution, holders of common stock are entitled to share ratably in all assets remaining after payment of liabilities and the liquidation preferences of any outstanding shares of preferred stock. Holders of common stock have no preemptive rights and have no right to convert their common stock into any other securities and there are no redemption provisions applicable to our common stock.

The holders of common stock are entitled to any dividends that may be declared by the Board of Directors out of funds legally available for payment of dividends subject to the prior rights of holders of preferred stock and any contractual restrictions we have against the payment of dividends on common stock. We have not paid dividends on our common stock since inception and do not plan to pay dividends on our common stock in the foreseeable future.

As of April 20, 2026, we had 13,785,759 shares of common stock outstanding. In addition, as of that date, there were 7,758,616 shares underlying our outstanding warrants and stock options.

Preferred Stock

We are authorized to issue 1,000,000 shares of “blank check” preferred stock with designations, rights and preferences as may be determined from time to time by our Board of Directors. As the date of this prospectus, we had no shares of preferred stock issued and outstanding.

Preferred stock is available for possible future financings or acquisitions and for general corporate purposes without further authorization of our shareholders unless such authorization is required by applicable law, or the rules of any securities exchange or market on which our stock is then listed or admitted or trading.

Our Board of Directors may authorize the issuance of preferred stock with voting or conversion rights that could adversely affect the voting power or other rights of the holders of common stock. The issuance of preferred stock, while providing flexibility in connection with possible acquisitions and other corporate purposes could, under some circumstances, have the effect of delaying, deferring or preventing a change in control of the Company. For a description of how future issuances of our preferred stock could affect the rights of our shareholders, see “Certain Provisions of Delaware Law and of Our Charter and Bylaws - Issuance of “blank check” Preferred Stock,” below.

A prospectus supplement relating to any series of preferred stock being offered will include specific terms relating to the offering. Such prospectus supplement will include:

●	the title and stated or par value of the preferred stock;

●	the number of shares of the preferred stock offered, the liquidation preference per share and the offering price of the preferred stock;

●	the dividend rate(s), period(s) and/or payment date(s) or method(s) of calculation thereof applicable to the preferred stock;

●	whether dividends shall be cumulative or non-cumulative and, if cumulative, the date from which dividends on the preferred stock shall accumulate;

●	the provisions for a sinking fund, if any, for the preferred stock;

●	any voting rights of the preferred stock;

●	the provisions for redemption, if applicable, of the preferred stock;

●	any listing of the preferred stock on any securities exchange;

●	the terms and conditions, if applicable, upon which the preferred stock will be convertible into our common stock, including the conversion price or the manner of calculating the conversion price and conversion period;

●	if appropriate, a discussion of federal income tax consequences applicable to the preferred stock; and

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

DESCRIPTION OF WARRANTS

We may issue warrants for the purchase of common stock. Warrants may be issued independently or together with other securities and may be attached to or separate from any offered securities. Each series of warrants will be issued under a separate warrant agreement. The following outlines some of the general terms and provisions of the warrants that we may issue from time to time. Additional terms of the warrants and the applicable warrant agreement will be set forth in the applicable prospectus supplement.

The following descriptions, and any description of the warrants included in a prospectus supplement, may not be complete and is subject to and qualified in its entirety by reference to the terms and provisions of the applicable warrant agreement, which we will file with the SEC in connection with any offering of warrants.

General

The prospectus supplement relating to a particular issue of warrants will describe the terms of the warrants, including the following:

●	the title of the warrants;

●	the offering price for the warrants, if any;

●	the aggregate number of the warrants;

●	the terms of the security that may be purchased upon exercise of the warrants;

●	if applicable, the designation and terms of the securities that the warrants are issued with and the number of warrants issued with each security;

●	if applicable, the date from and after which the warrants and any securities issued with the warrants will be separately transferable;

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

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

●	if applicable, a discussion of material United States federal income tax considerations;

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

●	redemption or call provisions, if any, applicable to the warrants; and

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

Exercise of warrants

Each warrant will entitle the holder of the warrant to purchase the securities that we specify in the applicable prospectus supplement at the exercise price that we describe 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. Holders may exercise warrants as set forth in the prospectus supplement relating to the warrants being offered. Until a holder exercises the warrants to purchase any securities underlying the warrants, the holder will not have any rights as a holder of the underlying securities by virtue of ownership of warrants.

DESCRIPTION OF UNITS

As specified in any applicable prospectus supplement, we may issue units consisting of one or more warrants, shares of preferred stock, shares of common stock or any combination of such securities.

Transfer Agent

We have appointed Equity Stock Transfer as our transfer agent. Their contact information is: 237 West 37th Street, Suite 602, New York, New York 10018, phone number (212) 575-5757.

CERTAIN PROVISIONS OF DELAWARE LAW AND OF OUR CHARTER AND BYLAWS

Anti-takeover Provisions

In general, Section 203 of the Delaware General Corporation Law (the “DGCL”) prohibits a Delaware corporation with a class of voting stock listed on a national securities exchange or held of record by 2,000 or more shareholders from engaging in a “business combination” with an “interested shareholder” for a three-year period following the time that this shareholder becomes an interested shareholder, unless the business combination is approved in a prescribed manner. A “business combination” includes, among other things, a merger, asset or stock sale or other transaction resulting in a financial benefit to the interested shareholder. An “interested shareholder” is a person who, together with affiliates and associates, owns, or did own within three years prior to the determination of interested shareholder status, 15% or more of the corporation’s voting stock. Under Section 203, a business combination between a corporation and an interested shareholder is prohibited unless it satisfies one of the following conditions:

●	before the shareholder became interested, the board of directors approved either the business combination or the transaction which resulted in the shareholder becoming an interested shareholder;

●	upon consummation of the transaction which resulted in the shareholder becoming an interested shareholder, the interested shareholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced, excluding for purposes of determining the voting stock outstanding, shares owned by persons who are directors and also officers, and employee stock plans, in some instances; or

●	at or after the time the shareholder became interested, the business combination was approved by the board of directors of the corporation and authorized at an annual or special meeting of the shareholders by the affirmative vote of at least two-thirds of the outstanding voting stock which is not owned by the interested shareholder.

The DGCL permits a corporation to opt out of, or choose not to be governed by, its anti-takeover statute by expressly stating so in its original certificate of incorporation (or subsequent amendment to its certificate of incorporation or bylaws approved by its shareholders). Our Certificate of Incorporation and Bylaws do not contain a provision expressly opting out of the application of Section 203 of the DGCL; therefore, we are subject to the anti-takeover statute.

Issuance of “Blank Check” Preferred Stock

Our Certificate of Incorporation authorizes the issuance of up to 1,000,000 shares of “blank check” preferred stock with designations, rights and preferences as may be determined from time to time by our Board of Directors. Our Board of Directors is empowered, without shareholder approval, to issue a series of preferred stock with dividend, liquidation, conversion, voting or other rights which could dilute the interest of, or impair the voting power of, our common shareholders. The issuance of a series of preferred stock could be used as a method of discouraging, delaying or preventing a change in control. For example, it would be possible for our Board of Directors to issue preferred stock with voting or other rights or preferences that could impede the success of any attempt to effect a change in control of our Company.

Our Bylaws also allow our Board of Directors to fix the number of directors. Our shareholders do not have cumulative voting in the election of directors.

Special Shareholder Meetings and Action by Written Consent

Under our Bylaws, special meetings of the shareholders shall be held when directed by (i) the Board of Directors, or (ii) when requested in writing by the holders of not less than 20 percent of all the shares entitled to vote at the meeting. Our Bylaws do not permit meetings of shareholders to be called by any other person. This could have the effect of delaying or preventing unsolicited takeovers and changes in control or changes in our management.

Indemnification of Directors and Officers.

Section 145(a) of the DGCL, which Cocrystal is subject to, provides that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by the person in connection with such action, suit or proceeding if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe the person’s conduct was unlawful. Section 145(b) of the DGCL provides that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against expenses (including attorneys’ fees) actually and reasonably incurred by the person in connection with the defense or settlement of such action or suit if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation and except that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable to the corporation unless and only to the extent that the Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery or such other court shall deem proper. To the extent that a present or former director or officer of a corporation has been successful on the merits or otherwise in defense of any action, suit or proceeding referred to in Section 145(a) and (b) of the DGCL, or in defense of any claim, issue or matter therein, such person shall be indemnified against expenses (including attorneys’ fees) actually and reasonably incurred by such person in connection therewith.

Any indemnification under Section 145(a) and (b) of the DGCL (unless ordered by a court) shall be made by Cocrystal only as authorized in the specific case upon a determination that indemnification of the present or former director, officer, employee or agent is proper in the circumstances because the person has met the applicable standard of conduct set forth in Section 145(a) and (b). Such determination shall be made, with respect to a person who is a director or officer at the time of such determination, (1) by a majority vote of the directors who are not parties to such action, suit or proceeding, even though less than a quorum, or (2) by a committee of such directors designated by majority vote of such directors, even though less than a quorum, or (3) if there are no such directors, or if such directors so direct, by independent legal counsel in a written opinion, or (4) by the shareholders. Expenses (including attorneys’ fees) incurred by an officer or director in defending any civil, criminal, administrative or investigative action, suit or proceeding may be paid by the corporation in advance of the final disposition of such action, suit or proceeding upon receipt of an undertaking by or on behalf of such director or officer to repay such amount if it shall ultimately be determined that such person is not entitled to be indemnified by the corporation as authorized in this section. Such expenses (including attorneys’ fees) incurred by former directors and officers or other employees and agents may be so paid upon such terms and conditions, if any, as the corporation deems appropriate. The indemnification and advancement of expenses provided by, or granted pursuant to, Section 145 shall not be deemed exclusive of any other rights to which those seeking indemnification or advancement of expenses may be entitled under any bylaw, agreement, vote of shareholders or disinterested directors or otherwise, both as to action in such person’s official capacity and as to action in another capacity while holding such office. We have entered into Indemnification Agreements with each director and executive officer.

Section 145 of the DGCL also empowers a corporation to purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any liability asserted against such person and incurred by such person in any such capacity, or arising out of such person’s status as such, whether or not the corporation would have the power to indemnify such person against such liability under Section 145.

Article 11 of Cocrystal’s Certificate of Incorporation provides that directors and officers of the Company, and any persons serving at the request of the Company as a director, officer, employee or agent of another corporation or of a partnership, joint venture, trust or other enterprise, including service with respect to employee benefit plans, shall be indemnified to the fullest extent permitted by the DGCL.

Cocrystal carries directors and officers liability coverages designed to insure its officers and directors and those of its subsidiaries against certain liabilities incurred by them in the performance of their duties, and also providing for reimbursement in certain cases to Cocrystal and its subsidiaries for sums paid to directors and officers as indemnification for similar liability.

Insofar as indemnification for liabilities arising under the Securities Act of 1933 (the “Securities Act”) may be permitted to our directors, officers and controlling persons pursuant to the foregoing provisions, or otherwise, Cocrystal has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable.

Governing Law and Forum Selection

Article 12 of Cocrystal’s Certificate of Incorporation and Article XI, Section 1 of Cocrystal’s Bylaws provide that the internal affairs of the Company shall be governed by and interpreted under the laws of the State of Delaware, excluding its conflict of laws principles, and that unless the Company consents in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware shall be the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of the Company, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director or officer (or affiliate of any of the foregoing) of the Company to the Company or the Company’s shareholders, (iii) any action asserting a claim arising pursuant to any provision of the DGCL or the Company’s Certificate of Incorporation or Bylaws, or (iv) any other action asserting a claim arising under, in connection with, and governed by the internal affairs doctrine. These provisions have the effect of requiring parties bringing actions concerning the Company’s internal affairs, including actions brought by the Company’s shareholders, to litigate such matters in the Delaware Court of Chancery, to the extent such exclusive jurisdiction is permitted under applicable law. As such, shareholders of the Company seeking to bring a claim regarding the internal affairs of the Company may be subject to increased costs associated with litigating in Delaware as opposed to their home state or other forum, precluded from bringing such a claim in a forum they otherwise consider to be more favorable, and discouraged from bringing such claims as a result of the foregoing or other factors related to forum selection. These provisions do not provide the Delaware Court of Chancery with jurisdiction over matters for which federal courts have exclusive jurisdiction, such as suits brought to enforce any duty or liability created by the Exchange Act or the rules and regulations promulgated thereunder.

Further, Article XI, Section 2 of Cocrystal’s Bylaws provides that the United States federal courts with exclusive jurisdiction over claims brought under the Securities Act. The effect of this provision is that an action under the Securities Act with respect to the Company may only be brought in the federal courts, whereas absent such provision the federal and state courts would otherwise have concurrent jurisdiction over such a matter. Additionally, Article XI, Section 3 of Cocrystal’s Bylaws provides for the United States District Court for the District of Delaware as the exclusive venue for any cause of action under either the Securities Act or the Securities Exchange Act of 1934 (the “Exchange Act”), meaning such federal court is the only court in which such a case may be brought and heard.

Additionally, Section 22 of the Securities Act provides that state and federal courts have concurrent jurisdiction over claims to enforce any duty or liability created by the Securities Act or the rules and regulations promulgated thereunder. As such, there is some uncertainty as to the effect that the foregoing provisions of Cocrystal’s Certificate of Incorporation and Bylaws would have when a claim under the DGCL is combined with a claim under the Securities Act, and in such a case those provisions may cause the DGCL claim and the Securities Act claim to be separated between the courts having jurisdiction over the respective claims, or alternatively it may cause the DGCL claim and the Securities Act claim to be consolidated in the Delaware Court of Chancery.

The Delaware Supreme Court has upheld a charter provision designating federal courts as the exclusive forum for actions brought under the Securities Act. Further, based on a decision by the United States Court of Appeals for the Seventh Circuit, the Company believes that the foregoing provisions will effect a claim made under the DGCL that is combined with a claim made under the Exchange Act by causing the DGCL claim and the Exchange Act claim to be separated between the courts having jurisdiction over the respective claims. However, because the case in question was decided by the Seventh Circuit, its ruling is not necessarily binding on federal or state courts sitting in Delaware, and we cannot assure you that other courts will rule the same way with respect to claims brought under the Exchange Act.

Because the foregoing provisions of our Certificate of Incorporation and Bylaws may have the effect of severing certain causes of action between federal and state courts, shareholders seeking to assert such claims face the risk of increased litigation expenses arising from litigating multiple related claims in two separate courts, and shareholders may be discouraged from bringing all or some of these claims as a result. Notwithstanding the foregoing, the Company’s shareholders will not be deemed to have waived the Company’s compliance obligations with respect to the federal securities laws, including the Exchange Act and the Securities Act, or the rules and regulations promulgated thereunder.

PLAN OF DISTRIBUTION

We may sell the securities offered by this prospectus from time to time in one or more transactions, including without limitation:

●	through underwriters or brokers;

●	directly to purchasers;

●	in a rights offering;

●	in “at-the-market” offerings, within the meaning of Rule 415(a)(4) of the Securities Act to or through a market maker or into an existing trading market on an exchange or otherwise;

●	through agents;

●	in block trades;

●	through a combination of any of these methods; or

●	through any other method permitted by applicable law and described in a prospectus supplement.

In addition, we may issue the securities as a dividend or distribution to our existing stockholders or other security holders.

The prospectus supplement with respect to any offering of securities will include the following information:

●	the terms of the offering;

●	the names of any underwriters or agents;

●	the name or names of any managing underwriter or underwriters;

●	the purchase price or initial public offering price of the securities;

●	the net proceeds from the sale of the securities;

●	any delayed delivery arrangements;

●	any underwriting discounts, commissions and other items constituting underwriters’ compensation;

●	any discounts or concessions allowed or re-allowed or paid to brokers;

●	any commissions paid to agents; and

●	any securities exchange on which the securities may be listed.

Sale through Underwriters or Brokers

If underwriters are used in the sale, the underwriters may resell the securities 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. Underwriters may offer securities to the public either through underwriting syndicates represented by one or more managing underwriters or directly by one or more firms acting as underwriters. Unless we inform you otherwise in the applicable prospectus supplement, the obligations of the underwriters to purchase the securities will be subject to certain conditions, and the underwriters will be obligated to purchase all of the offered securities if they purchase any of them. The underwriters may change from time to time any initial public offering price and any discounts or concessions allowed or re-allowed or paid to brokers.

We will describe the name or names of any underwriters, brokers or agents and the purchase price of the securities in a prospectus supplement relating to the securities.

In connection with the sale of the securities, underwriters may receive compensation from us or from purchasers of the securities, for whom they may act as agents, in the form of discounts, concessions or commissions. Underwriters may sell the securities to or through brokers, and these brokers may receive compensation in the form of discounts, concessions or commissions from the underwriters and/or commissions from the purchasers for whom they may act as agents, which is not expected to exceed that customary in the types of transactions involved. Underwriters, brokers and agents that participate in the distribution of the securities may be deemed to be underwriters, and any discounts or commissions they receive from us, and any profit on the resale of the securities they realize may be deemed to be underwriting discounts and commissions, under the Securities Act. The prospectus supplement will identify any underwriter or agent and will describe any compensation they receive from us.

Underwriters could make sales in privately negotiated transactions and/or any other method permitted by law, including sales deemed to be an “at-the-market” offering, sales made directly on The Nasdaq Capital Market, the existing trading market for our shares of common stock, or sales made to or through a market maker other than on The Nasdaq Capital Market. The name of any such underwriter or agent involved in the offer and sale of our securities, the amounts underwritten, and the nature of its obligations to take our securities will be described in the applicable prospectus supplement.

Unless otherwise specified in the prospectus supplement, each series of the securities will be a new issue with no established trading market, other than our shares of common stock, which are currently traded on The Nasdaq Capital Market. It is possible that one or more underwriters may make a market in a series of the securities, but underwriters will not be obligated to do so and may discontinue any market making at any time without notice. Therefore, we can give no assurance about the liquidity of the trading market for any of the securities.

Under agreements we may enter into, we may indemnify underwriters, brokers, and agents who participate in the distribution of the securities against certain liabilities, including liabilities under the Securities Act, or contribute with respect to payments that the underwriters, brokers or agents may be required to make.

Any compensation we pay underwriters or brokers will be subject to the guidelines of the Financial Industry Regulatory Authority, Inc. We will disclose the compensation in any applicable prospectus supplement or pricing supplement, as the case may be.

To facilitate the offering of securities, certain persons participating in the offering may engage in transactions that stabilize, maintain, or otherwise affect the price of the securities. This may include over-allotments or short sales of the securities, which involve the sale by persons participating in the offering of more securities than we sold to them. In these circumstances, these persons would cover such over-allotments or short positions by making purchases in the open market or by exercising their over-allotment option, if any. In addition, these 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 brokers participating in the 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. These transactions may be discontinued at any time.

From time to time, we may engage in transactions with these underwriters, brokers, and agents in the ordinary course of business.

Direct Sales and Sales through Agents

We may sell the securities directly. In this case, no underwriters or agents would be involved. We also may sell the securities through agents designated by us from time to time. In the applicable prospectus supplement, we will name any agent involved in the offer or sale of the offered securities, and we will describe any commissions payable to the agent. Unless we inform you otherwise in the applicable prospectus supplement, any agent will agree to use its reasonable best efforts to solicit purchases for the period of its appointment.

We may sell the securities directly to institutional investors or others who may be deemed to be underwriters within the meaning of the Securities Act with respect to any sale of those securities. We will describe the terms of any sales of these securities in the applicable prospectus supplement.

Remarketing Arrangements

Securities also may be offered and sold, if so indicated in the applicable 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 agreements, if any, with us and its compensation will be described in the applicable prospectus supplement.

Delayed Delivery Contracts

If we so indicate in the applicable prospectus supplement, we may authorize agents, underwriters or brokers to solicit offers from certain types of institutions to purchase securities from us at the public offering price under delayed delivery contracts. These contracts would provide for payment and delivery on a specified date in the future. The contracts would be subject only to those conditions described in the applicable prospectus supplement. The applicable prospectus supplement will describe the commission payable for solicitation of those contracts.

General Information

We may have agreements with the underwriters, brokers, agents and remarketing firms to indemnify them against certain civil liabilities, including liabilities under the Securities Act, or to contribute with respect to payments that the underwriters, brokers, agents or remarketing firms may be required to make. Underwriters, brokers, agents and remarketing firms may be customers of, engage in transactions with or perform services for us in the ordinary course of their businesses.

LEGAL MATTERS

The validity of the securities offered hereby will be passed upon for us by Nason, Yeager, Gerson, Harris & Fumero, P.A., Palm Beach Gardens, Florida.

EXPERTS

The consolidated financial statements of Cocrystal Pharma, Inc. and subsidiaries as of December 31, 2025 and 2024, and for the years then ended, incorporated in this prospectus by reference to the Annual Report on Form 10-K filed on March 31, 2026, have been audited by Weinberg & Company, P.A., an independent registered public accounting firm, as stated in their report (which report includes an explanatory paragraph as to the Company’s ability to continue as a going concern). Such financial statements are incorporated by reference in reliance upon the report of such firm, given their authority as experts in accounting and auditing.

INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

The documents listed below are incorporated by reference into this prospectus:

●	Our annual report on Form 10-K for the year ended December 31, 2025 filed on March 31, 2026; and

●	Our current reports on Form 8-K filed on January 15, 2026, and March 13, 2026, (other than current reports furnished under Item 2.02 or Item 7.01 of Form 8-K and exhibits that are related to such item); and

●	The description of our common stock contained in our Registration Statement on Form 8-A (File No. 001-38418), filed under Section 12(b) of the Exchange Act on March 9, 2018, as amended in Exhibit 4.1 to the Company’s Annual Report on For 10-K filed on March 27, 2020, and any subsequent amendment or report filed for the purpose of amending such description; and

●	All documents subsequently filed pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act prior to the termination of the offering, other than information furnished pursuant to Items 2.02 and 7.01 of Form 8-K and any related exhibits, shall be deemed to be incorporated by reference into the prospectus.

Any statement contained in a document incorporated or deemed to be incorporated by reference in this prospectus is modified or superseded for purposes of the prospectus to the extent that a statement contained in this prospectus or in any other subsequently filed document that also is or is deemed to be incorporated by reference herein modifies or supersedes such statement.

We will provide to each person, including any beneficial owner, to whom a prospectus is delivered, a copy of any or all of the information that has been incorporated by reference in this prospectus but not delivered with the prospectus.

We are an Exchange Act reporting company and are required to file periodic reports on Form 10-K and 10-Q and current reports on Form 8-K. The SEC maintains an internet website that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC, including Cocrystal at www.sec.gov. You may also access our Exchange Act reports and proxy statements free of charge at our website, www.cocrystalpharma.com.

You may obtain a copy of any of our filings, at no cost, by contacting us at:

19805 N. Creek Parkway

Bothell, WA 98011

(877) 262-7123

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Other Expenses of Issuance and Distribution.

The following table sets forth the costs and expenses payable by us in connection with the issuance and distribution of the securities being registered hereunder. All of the amounts shown are estimates, except for the SEC Registration Fees.

Commission registration fees	$	20,715
Printing expenses	$	(1	)
Accounting fees and expenses	$	(1	)
Legal fees and expenses	$	(1	)
Miscellaneous	$	(1	)
Total	$	(1	)

(1) These fees are dependent on the type and number of securities offered and cannot be determined at this time. Additional information regarding estimated fees and expenses will be provided at the time that such information is required to be included in a prospectus supplement.

Indemnification of Directors and Officers.

II-1

Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to our directors, officers and controlling persons pursuant to the foregoing provisions, or otherwise, Cocrystal has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable.

Exhibits and Financial Statement Schedules.

Exhibit No.		Description
1.1		Form of Underwriting Agreement*
3.1		Certificate of Incorporation, as amended (incorporated by reference to Exhibit 3.1 to Form 10-Q filed on August 16, 2021)
3.1(a)		Certificate of Amendment to Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to Form 8-K filed on October 3, 2022)
3.1(b)		Certificate of Amendment to Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to Form 8-K filed on June 28, 2024)
3.2		Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 to Form 8-K filed on February 19, 2021)
3.2(a)		Amendment No. 1 to Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 to Form 8-K filed on June 18, 2025)
4.1		Specimen Common Stock Certificate (incorporated herein by reference to Exhibit 4.1 to Form S-3 filed on August 14, 2015)
4.2		Specimen Preferred Stock Certificate and Form of Certificate of Designation of Preferred Stock*
4.5		Form of Unit Certificate or Unit Agreement*
5.1		Legal Opinion of Nason, Yeager, Gerson, Harris & Fumero, P.A.
23.1		Consent of Weinberg & Company
23.2		Consent of Nason, Yeager, Gerson, Harris & Fumero, P.A. (included in Exhibit 5.1)
107		Filing fee table

*	To be filed by amendment or by Current Report on Form 8-K.

II-2

Undertakings

The undersigned registrant hereby undertakes:

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 SEC 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 in such information in the registration statement;

provided, however, that paragraphs (i), (ii) and (iii) 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 SEC by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in this registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

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.

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.

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

(A) Each prospectus filed by a 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

(B) 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)(1)(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 the 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.

II-3

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.

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.

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 Act 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 Act and will be governed by the final adjudication of such issue.

The undersigned registrant hereby undertakes that:

(1) 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 shall be deemed to be part of this registration statement as of the time it was declared effective.

(2) 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.

II-4

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 City of Bothell, State of Washington, on April 23, 2026.

	Cocrystal Pharma, Inc.

	By:	/s/ James Martin
		James Martin
		Co-Chief Executive Officer (Principal Executive Officer)

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

Signature	Title	Date

/s/ James Martin	Co-Chief Executive Officer and Chief Financial Officer (Principal Financial, Accounting and Executive Officer)	April 23, 2026
James Martin

/s/ Sam Lee	President and Co-Chief Executive Officer (Principal	April 23, 2026
Sam Lee	Executive Officer)

/s/ Roger Kornberg	Chairman of the Board of Directors	April 23, 2026
Roger Kornberg

/s/ Phillip Frost	Director	April 23, 2026
Phillip Frost

/s/ Fred Hassan	Director	April 23, 2026
Fred Hassan

/s/ Richard Pfenniger	Director	April 23, 2026
Richard Pfenniger

/s/ Steven Rubin	Director	April 23, 2026
Steven Rubin

II-5

SEC Form S-3 filed by Cocrystal Pharma Inc.