SCHEDULE 13G 0001232258 XXXXXXXX LIVE Class A Common Stock, par value $0.001 per share 09/26/2025 0001790340 Immuneering Corp 45254E107 245 Main St. Second Floor Cambridge MA 02142 Rule 13d-1(c) HBM Healthcare Investments (Cayman) Ltd. E9 3646304.00 0.00 3646304.00 0.00 3646304.00 N 5.7 CO Voting and investment power over the shares held by HBM Healthcare Investments (Cayman) Ltd. is exercised by the board of directors of HBM Healthcare Investments (Cayman) Ltd. (the "Board"). The Board consists of Jean-Marc LeSieur, Richard H. Coles, Sophia Harris, Dr. Andreas Wicki, Mark Kronenfeld, M.D., and Richard Paul Woodhouse, none of whom has individual voting or investment power with respect to the shares. Immuneering Corp 245 Main St., Second Floor, Cambridge, MA, 02142 HBM Healthcare Investments (Cayman) Ltd. (the "Reporting Person") Governors Square, 23 Lime Tree Bay Avenue, PO Box 30852, Grand Cayman, KY1-1204, Cayman Islands Cayman Islands, British West Indies Y As of the date hereof, the Reporting Person may be deemed the beneficial owner of 3,646,304 shares of Class A Common Stock, which represent approximately 5.7% of the shares of Class A Common Stock outstanding. The percentage set forth herein is calculated based on 63,483,397 shares of Class A Common Stock outstanding as of September 30, 2025, based on information received from the Issuer. 5.7% 3,646,304 0 3,646,304 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 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. HBM Healthcare Investments (Cayman) Ltd. /s/ Jean-Marc LeSieur 10/03/2025