As filed with the U.S. Securities and Exchange Commission on March 31, 2026

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

KODIAK SCIENCES INC.

(Exact name of registrant as specified in its charter)

1250 Page Mill Road

Palo Alto, California 94304
(Address, including zip code, of principal executive offices)

2018 Equity Incentive Plan
(Full title of the plan)

D. Victor Perlroth, M.D.

Chairman and Chief Executive Officer

1250 Page Mill Road

Palo Alto, CA 94304

(650) 281-0850
(Name, address and telephone number, including
area code, of agent for service)

Copies to:

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.

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 the Securities Act 

EXPLANATORY NOTE

This Registration Statement on Form S-8 is being filed by Kodiak Sciences Inc. (the “Registrant”) for the purpose of registering an additional 2,470,338 shares of the Registrant’s Common Stock, par value $0.0001 per share (“Common Stock”), under the Registrant’s 2018 Equity Incentive Plan (the “2018 Plan”), pursuant to the provisions of the 2018 Plan providing for an automatic increase in the number of shares of Common Stock reserved and available for issuance under the 2018 Plan.

These additional shares of Common Stock are securities of the same class as other securities for which a Registration Statement of the Registrant on Form S-8 relating to the 2018 Plan are effective. The Registrant previously registered shares of its Common Stock for issuance under the 2018 Plan on Registration Statements on Form S-8 filed with the Securities and Exchange Commission (the "Commission") on October 9, 2018 (No. 333-227755), May 15, 2019 (No. 333-231503), March 2, 2021 (No. 333-253751), May 10, 2022 (No. 333-264829), March 28, 2023 (No. 333-270907), March 28, 2024 (No. 333-278339), and March 27, 2025 (No. 333-286175) (collectively, the “Prior Registration Statements”). Pursuant to General Instruction E to Form S-8, the contents of such Prior Registration Statements are incorporated by reference into this Registration Statement.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3. INCORPORATION OF DOCUMENTS BY REFERENCE.

The Registrant hereby incorporates by reference into this Registration Statement the following documents previously filed with the Commission:

(1) The Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025 (the “Annual Report”), filed with the Commission on March 31, 2026 pursuant to Section 13(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”); and

(2) The description of the Registrant’s Common Stock contained in the Company’s Registration Statement on Form 8-A (File No. 001-38682) filed with the Commission on October 1, 2018, pursuant to Section 12(b) of the Exchange Act, including any amendment or report filed for the purpose of updating such description, including Exhibit 4.6 of the Annual Report.

ITEM 8. EXHIBIT INDEX

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Palo Alto, California, on March 31, 2026.

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Victor Perlroth and John Borgeson as his or her true and lawful attorneys-in-fact and agents, each 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 (including his or her capacity as a director or officer of Kodiak Sciences Inc.) to sign any or all amendments (including post-effective amendments) to this registration statement, and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as they, he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agents or any of them, or their, his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement on Form S-8 has been signed by the following persons in the capacities and on the dates indicated.

Exhibit 5.1

David G. Peinsipp

T: +1 415-693-2177

dpeinsipp@cooley.com

March 31, 2026

Kodiak Sciences Inc.

1250 Page Mill Road

Palo Alto, California 94304

Re: Registration Statement on Form S-8

Ladies and Gentlemen:

We have acted as counsel to Kodiak Sciences Inc., a Delaware corporation (the “Company”), in connection with the filing by the Company of a Registration Statement on Form S-8 (the “Registration Statement”) with the Securities and Exchange Commission (the “Commission”) covering the offering of up to 2,470,338 shares (the “Shares”) of the Company’s common stock, par value $0.0001 per share, issuable pursuant to the Company’s 2018 Equity Incentive Plan (the “Plan”).

In connection with this opinion, we have examined and relied upon (a) the Registration Statement and the related prospectus, (b) the Plan, (c) the Company’s certificate of incorporation and bylaws, each as currently in effect, and (d) such other records, documents, opinions, certificates, memoranda, and instruments as in our judgment are necessary or appropriate to enable us to render the opinion expressed below. We have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals, the conformity to originals of all documents submitted to us as copies, the accuracy, completeness and authenticity of certificates of public officials, and the due authorization, execution and delivery of all documents by all persons other than the Company. As to certain factual matters, we have relied upon a certificate of an officer of the Company and have not independently verified such matters.

Our opinion is expressed only with respect to the General Corporation Law of the State of Delaware. We express no opinion to the extent that any other laws are applicable to the subject matter hereof and express no opinion and provide no assurance as to compliance with any federal or state securities law, rule or regulation.

On the basis of the foregoing, and in reliance thereon, we are of the opinion that the Shares, when sold and issued in accordance with the Plan, the Registration Statement and the related prospectus, will be validly issued, fully paid, and nonassessable (except as to shares issued pursuant to deferred payment arrangements, which will be fully paid and nonassessable when such deferred payments are made in full).

This opinion is limited to the matters expressly set forth in this letter, and no opinion has been or should be implied, or may be inferred, beyond the matters expressly stated. This opinion speaks only as to law and facts in effect or existing as of the date hereof, and we have no obligation or responsibility to update or supplement this opinion to reflect any facts or circumstances that may hereafter come to our attention or any changes in law that may hereafter occur.

We consent to the filing of this opinion as an exhibit to the Registration Statement. In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended, or the rules and regulations of the Commission thereunder.

Sincerely,

Cooley LLP

By: /s/ David G. Peinsipp

David G. Peinsipp

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of Kodiak Sciences Inc. of our report dated March 31, 2026 relating to the financial statements, which appears in Kodiak Sciences Inc.'s Annual Report on Form 10-K for the year ended December 31, 2025.

/s/ PricewaterhouseCoopers LLP
San Jose, California

March 31, 2026