Arboretum Ventures VI, L.P. - 01 Aug 2025 SCHEDULE 13G Report for Shoulder Innovations, Inc. Common Stock, $0.001 par value per share (SI)

Filing Manager: Arboretum Ventures VI, L.P.
Reporting Manager: Arboretum Ventures VI, L.P.
Security: Shoulder Innovations, Inc. Common Stock, $0.001 par value per share
Symbol: SI
Shares outstanding: 20,067,086 shares
Disclosed Ownership: 1,163,891 shares
Ownership: 5.8%
Form type: SCHEDULE 13G
Filing time: 08 Aug 2025, 16:42:46 UTC
Date of event: 01 Aug 2025
SEC: View on sec.gov

Reporting Managers (5)

Name	Ownership	Shares Owned	shared voting power	Signature	Title
Arboretum Ventures VI, L.P.	5.8%	1,163,891	1,163,891	/s/ Jan L. Garfinkle	By Arboretum Investment Manager VI, LLC, Its general partner, By Jan L. Garfinkle, Managing Director
Arboretum Investment Manager VI, LLC	5.8%	1,163,891	1,163,891	/s/ Jan L. Garfinkle	By Jan L. Garfinkle, Managing Director
Jan L. Garfinkle	5.8%	1,163,891	1,163,891	/s/ Jan L. Garfinkle	Jan L. Garfinkle
Daniel M. Kidle	5.8%	1,163,891	1,163,891	/s/ Daniel M. Kidle	Daniel M. Kidle
Thomas M. Shehab	5.8%	1,163,891	1,163,891	/s/ Thomas M. Shehab	Thomas M. Shehab