UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Gritstone bio, Inc.

(Exact name of Registrant as Specified in Its Charter)

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

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 13(a) of the Exchange Act. ☒

Item 5.07 Submission of Matters to a Vote of Security Holders.

On June 16, 2023, Gritstone bio, Inc. (the “Company”) held its 2023 annual meeting of stockholders (the “Annual Meeting”). Only stockholders of record at the close of business on April 19, 2023, the record date for the Annual Meeting, were entitled to vote at the Annual Meeting. As of the record date, 88,913,562 shares of the Company’s common stock were outstanding and entitled to vote at the Annual Meeting. At the Annual Meeting, 61,122,679 shares of the Company’s common stock were voted in person or by proxy for the two proposals set forth below, each of which is described in the Company’s Definitive Proxy Statement on Schedule 14A filed with the Securities and Exchange Commission on April 26, 2023.

Proposal No. 1 – Election of Directors

The Company’s stockholders elected the Class II director nominees below to the Company’s Board of Directors (the “Board”) to hold office until the 2026 Annual Meeting of Stockholders or until their successors are elected.

Proposal No. 2 – Ratification of Selection of Independent Registered Accounting Firm

The Company’s stockholders ratified the selection, by the Audit Committee of the Board, of Ernst & Young LLP as the independent registered public accounting firm of the Company for the fiscal year ending December 31, 2023.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.