SCHEDULE 13G 0002062781 XXXXXXXX LIVE Class A Common Stock, par value $0.00001 per share 06/30/2025 0001673743 Hinge Health, Inc. 433313103 455 Market Street Suite 700 San Francisco CA 94105 Rule 13d-1(d) Gabriel M.I. Mecklenburg X1 4025963 0 2550252 0 4025963 N 13.0 IN Hinge Health, Inc. 455 Market Street, Suite 700, San Francisco, CA 94105. This statement is filed on behalf of Gabriel M.I. Mecklenburg (the "Reporting Person"). The principal business address of the Reporting Person is c/o Hinge Health, Inc., 455 Market Street, Suite 700, San Francisco, CA 94105. The Reporting Person is a citizen of the United States. 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 Class A Common Stock as of June 30, 2025, based upon 26,905,214 shares of Class A Common Stock outstanding as of June 30, 2025, as provided by the Issuer. The information below assumes the conversion of the Class B common stock, par value $0.00001 per share ("Class B Common Stock") of the Issuer into shares of Class A Common Stock on a one-to-one basis. The Reporting Person is deemed to beneficially own 4,025,963 shares of Class A Common Stock, which includes: (i) 1,682,961 shares of Class A Common Stock underlying shares of Class B Common Stock held of record by the Reporting Person, (ii) 1,475,711 shares of Class B Common Stock held by family trusts over which the Reporting Person exercises voting power and (iii) 867,291 shares of Class B Common Stock underlying stock options held by the Reporting Person that are exercisable within 60 days of June 30, 2025. 13.0 4,025,963 0 2,550,252 0 Y Y Y Y Y Y Gabriel M.I. Mecklenburg /s/ Gabriel M.I. Mecklenburg 08/13/2025