SCHEDULE 13G/A 0001290162 XXXXXXXX LIVE 1 Common Stock, $0.0001 par value per share 06/30/2025 0001827506 Tourmaline Bio, Inc. 89157D105 27 West 24th Street Suite 702 New York NY 10010 Rule 13d-1(b) QVT Financial LP b DE 2154653 0 2154653 0 2154653 N 8.39 PN Tourmaline Bio, Inc. 27 West 24th Street, Suite 702, New York, NY 10010 QVT Financial LP 888 Seventh Avenue, 43rd Floor, New York, NY 10106 Delaware N IA 2,154,653 8.39 2,154,653 0 2,154,653 0 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 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. QVT Financial LP /s/ Meg Eisner 08/14/2025