144 0001420106 XXXXXXXX LIVE 0001699350 Shoulder Innovations, Inc. 001-42771 1535 Steele Avenue SW, Suite B Grand Rapids MI 49507 (616)-294-1026 Gilde Healthcare Holding B.V.; Cooperatieve Gilde Healthcare V U.A. 10% Stockholder Common Van Lanschot Kempen N.V.

Beethovenstraat 300 Amsterdam P7 1077 WZ

200000 4850000.00 20738226 07/29/2026 NYSE Common 02/10/2023 Private placement of Series D convertible preferred stock; converted into common stock upon IPO closing 08/01/2025. Holding period tacks under Rule 144(d)(3)(ii). Issuer N 1743156 02/10/2023 Cash Common 03/06/2025 Private placement of Series E convertible preferred stock; converted into common stock upon IPO closing 08/01/2025. Holding period tacks under Rule 144(d)(3)(ii). Issuer N 537326 03/06/2025 Cash Common 08/01/2025 Purchase in the issuer's registered initial public offering at $15.00 per share. Not restricted securities; sold as control securities. Underwriters N 100000 08/01/2025 Cash Y The securities are held directly by Cooperatieve Gilde Healthcare V U.A. ("Gilde"). Gilde Healthcare V Management B.V. is the managing director of Gilde and has sole voting and dispositive power with respect to the shares held by Gilde. Gilde Healthcare V Management B.V. is owned by Gilde Healthcare Holding B.V. The managing partners of Gilde Healthcare Holding B.V. are Manapouri B.V. (of which Edwin de Graaf is the owner and managing director) and Martemanshurk B.V. (of which Pieter van der Meer is the owner and managing director). 07/29/2026 Edwin de Graaf