POWER OF ATTORNEY Know all by these presents that the undersigned hereby constitutes and appoints Heather Turner Charles Newton and Hector Casab of Lyell Immunopharma Inc. and Lauren Creel and Allison Peth of Cooley LLP or any of them signing singly with full power of substitution the undersigned's true and lawful attorney in fact to: (1) execute for and on behalf of the undersigned in the undersigned's capacity as an officer director or beneficial owner of more than 10% of a registered class of securities of Lyell Immunopharma Inc. (the "Company") Forms 3 4 and 5 (including any amendments thereto) in accordance with Section 16(a) of the Securities Exchange Act of 1934 as amended (the "Exchange Act") and the rules thereunder and a Form ID Uniform Application for Access Codes to File on EDGAR; (2) do and perform any and all acts for and on behalf of the undersigned that may be necessary or desirable to execute such Forms 3 4 or 5 or Form ID (including any amendments thereto) and timely file such forms with the United States Securities and Exchange Commission and any stock exchange or similar authority; and (3) take any other action of any nature whatsoever in connection with the foregoing which in the opinion of such attorney-in-fact may be of benefit in the best interest of or legally required by the undersigned it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion. The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite necessary or proper to be done in the exercise of any of the rights and powers herein granted as fully to all intents and purposes as the undersigned might or could do if personally present with full power of substitution or revocation hereby ratifying and confirming all that such attorney-in-fact or such attorney-in-fact's substitute or substitutes shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact in serving in such capacity at the request of the undersigned are not assuming nor is the Company assuming any of the undersigned's responsibilities to comply with Section 16 of the Exchange Act. This Power of Attorney shall remain in full force and effect until the earliest to occur of (a) the undersigned is no longer required to file Forms 3 4 and 5 with respect to the undersigned's holdings of and transactions in securities issued by the Company (b) revocation by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact or (c) as to any attorney-in-fact individually until such attorney-in-fact is no longer employed by the Company or Cooley LLP. IN WITNESS WHEREOF the undersigned has caused this Power of Attorney to be executed as of this 2nd day of June 2021. /s/ Heather Turner Heather Turner 1
Lyell Immunopharma (LYEL) Form 3Lyell Immunopharma / Heather D Turner ownership change
Filed: 16 Jun 21, 7:24pm