Company: ATRA
Filing Date: 2025-04-28
Form Type: DEF 14A
Source: 0000950170-25-059322
Chunk: 75

Company: Atara Biotherapeutics, Inc.
Filing Date: 2025-04-28
Form: DEF 14A
Chunk 75
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 owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer. 1a. AnhCo Nguyen, Ph.D. 1b. Matthew K. Fust 1c. Gregory A. Ciongoli 1 Year 2 Years 3 Years Abstain SCAN TO VIEW MATERIALS & VOTEw ATARA BIOTHERAPEUTICS, INC. 1280 RANCHO CONEJO BOULEVARD THOUSAND OAKS, CA 91320 VOTE BY INTERNET Before The Meeting - Go to www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 p.m. Eastern Time on June 9, 2025. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form. During The Meeting - Go to www.virtualshareholdermeeting.com/ATRA2025 You may attend the meeting via the Internet and vote during the meeting. Have the information that is printed in the box marked by the arrow available and follow the instructions. VOTE BY PHONE - 1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions up until 11:59 p.m. Eastern Time on June 9, 2025. Have your proxy card in hand when you call and then follow the instructions. VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717.

V68531-P31357 Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice and Proxy Statement and 2024 Annual Report on Form 10-K are available at www.proxyvote.com. ATARA BIOTHERAPEUTICS, INC. Annual Meeting of Stockholders June 10, 2025 9:00 AM Pacific Time This proxy is solicited by the Board of Directors The undersigned stockholder hereby appoints AnhCo Nguyen and John Chao, or either of them, as proxies, each with the power to appoint his substitute, and hereby authorizes them to represent and to vote, as designated on the reverse side of this ballot, all of the shares of common stock of ATARA BIOTHERAPEUTICS, INC