SCHEDULE 13G 0002010692 XXXXXXXX LIVE Common Stock, par value $0.0001 per share 01/30/2025 0001604464 Atara Biotherapeutics, Inc. 046513206 2380 CONEJO SPECTRUM ST. SUITE 200, THOUSAND OAKS CA 91320 Rule 13d-1(c) Panacea Venture Healthcare Fund II, L.P. E9 0 550000 0 550000 550000 N 9.5 PN Panacea Venture Healthcare Fund II GP Company, Ltd. E9 0 550000 0 550000 550000 N 9.5 CO Panacea Innovation Limited E9 0 550000 0 550000 550000 N 9.5 CO James Huang F4 0 550000 0 550000 550000 N 9.5 IN Atara Biotherapeutics, Inc. 2380 Conejo Spectrum Street, Suite 200, Thousand Oaks, CA 91320 Each of the following is hereinafter individually referred to as a "Reporting Person" and collectively as the "Reporting Persons." This statement is filed on behalf of: Panacea Venture Healthcare Fund II, L.P. Panacea Venture Healthcare Fund II GP Company, Ltd. Panacea Innovation Limited James Huang The business address of each of the Reporting Persons is c/o Maples Corporate Services Limited, Ugland House, Grand Cayman KY1-1104, Cayman Islands. Mr. Huang is a citizen of the Republic of China.The remaining Reporting Persons are organized under the laws of the Cayman Islands. Y The information contained on the cover pages to this Schedule 13G is incorporated by reference into this Item 4. The ownership information presented herein represents beneficial ownership of Common Stock as of the date of this filing, based upon 5,759,750 shares of Common Stock outstanding as of November 6, 2024, as disclosed in the Issuer's Current Report on Form 10-Q filed with the Securities and Exchange Commission on November 12, 2024. Panacea Venture Healthcare Fund II, L.P. is the record holder of the Common Stock reported herein. James Huang is the sole owner of Panacea Innovation Limited, which is the sole owner of Panacea Venture Healthcare Fund II GP Company, Ltd., which is the general partner of Panacea Venture Healthcare Fund II, L.P. As a result, each of the Reporting Persons may be deemed to share beneficial ownership of the Common Stock directly reported herein, but each disclaims such beneficial ownership. Panacea Venture Healthcare Fund II, L.P.: 9.5% Panacea Venture Healthcare Fund II GP Company, Ltd.: 9.5% Panacea Innovation Limited: 9.5% James Huang: 9.5% Panacea Venture Healthcare Fund II, L.P.: 0 Panacea Venture Healthcare Fund II GP Company, Ltd.: 0 Panacea Innovation Limited: 0 James Huang: 0 Panacea Venture Healthcare Fund II, L.P.: 550,000 Panacea Venture Healthcare Fund II GP Company, Ltd: 550,000 Panacea Innovation Limited: 550,000 James Huang: 550,000 Panacea Venture Healthcare Fund II, L.P.: 0 Panacea Venture Healthcare Fund II GP Company, Ltd.: 0 Panacea Innovation Limited: 0 James Huang: 0 Panacea Venture Healthcare Fund II, L.P.: 550,000 Panacea Venture Healthcare Fund II GP Company, Ltd: 550,000 Panacea Innovation Limited: 550,000 James Huang: 550,000 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Panacea Venture Healthcare Fund II, L.P. By: Panacea Venture Healthcare Fund II GP Company, Ltd., its general partner, By: Panacea Innovation Limited, its sole owner, /s/ James Huang 02/06/2025 Panacea Venture Healthcare Fund II GP Company, Ltd. By: Panacea Innovation Limited, its sole owner, /s/ James Huang 02/06/2025 Panacea Innovation Limited /s/ James Huang 02/06/2025 James Huang /s/ James Huang 02/06/2025