GRTS Gritstone bio Inc

As filed with the Securities and Exchange Commission on May 9, 2022

Registration No. 333-                

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

2021 Employment Inducement Incentive Plan

(Full Title of the Plan)

Andrew Allen, M.D., Ph.D.

President and Chief Executive Officer

Gritstone bio, Inc.

5959 Horton Street, Suite 300

Emeryville, California 94608

(510) 871-6100

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

Copies to:

Brian J. Cuneo, Esq.

Latham & Watkins LLP

140 Scott Drive

Menlo Park, California 94025

Telephone: (650) 328-4600

Facsimile: (650) 463-2600

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.  ☒

Proposed sale to take place as soon after the effective date of the

registration statement as awards under the plans are exercised and/or vest.

REGISTRATION OF ADDITIONAL SECURITIES

By a registration statement on Form S-8 filed with the Securities and Exchange Commission (the “SEC”) on May 6, 2021 (File No. 333-255847) (the “Original Registration Statement”), Gritstone bio, Inc. (the “Registrant”) registered 790,400 shares of common stock, par value $0.0001 per share (the “Common Stock”), issuable under the 2021 Employment Inducement Incentive Plan (the “2021 Plan”). The Registrant is hereby registering an additional 700,000 shares of Common Stock issuable under the 2021 Plan which shares are now available for grant.

INCORPORATION BY REFERENCE OF CONTENTS OF

REGISTRATION STATEMENT ON FORM S-8

Pursuant to Instruction E of Form S-8, the contents of the Original Registration Statement are incorporated by reference in this registration statement on Form S-8.

INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS

The information called for in Part I of Form S-8 is not being filed with or included in this Form S-8 (by incorporation by reference or otherwise) in accordance with the rules and regulations of the SEC.