X0202 SCHEDULE 13G/A 0000902664-26-001061 0001784547 XXXXXXXX LIVE 1 Common Stock, par value $0.0001 per share 03/31/2026 0001720580 Adicet Bio, Inc. 007002207 131 DARTMOUTH STREET 3RD FLOOR BOSTON MA 02116 Rule 13d-1(b) Woodline Partners LP DE 313124.00 0.00 313124.00 0.00 313124.00 N 3.3 IA PN Adicet Bio, Inc. 131 Dartmouth Street, 3rd Floor, Boston, MA 02116 This statement is filed by Woodline Partners LP ("Woodline Partners" or the "Reporting Person"), a Delaware limited partnership, and the investment adviser to Woodline Master Fund LP (the "Woodline Fund"), with respect to the shares of common stock, par value $0.0001 per share ("Common Stock"), of Adicet Bio, Inc. (the "Company") directly held by the Woodline Fund. The filing of this statement should not be construed as an admission that any of the foregoing persons or the Reporting Person is, for the purposes of Section 13 of the Securities Exchange Act of 1934, the beneficial owner of the shares of Common Stock reported herein. The address of the business office of Woodline Partners is 4 Embarcadero Center, Suite 3450, San Francisco, CA 94111. Woodline Partners is a Delaware limited partnership. N IA The information required by Item 4(a) is set forth in Row 9 of the cover page for the Reporting Person and is incorporated herein by reference. The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 9,596,407 shares of Common Stock outstanding as of March 10, 2026, as reported in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed with the Securities and Exchange Commission on March 12, 2026. 3.3% The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for the Reporting Person and is incorporated herein by reference. The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for the Reporting Person and is incorporated herein by reference. The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for the Reporting Person and is incorporated herein by reference. The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for the Reporting Person and is incorporated herein by reference. N Y N See Item 2(a). Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and 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. Woodline Partners LP /s/ Erin Mullen 05/15/2026