Sell4

SHOULDER INNOVATIONS, INC.

Total Value

$567.4K

Net $567.4K sold

Filing Date

Aug 24, 2026

3 transactions

Sales

$567.4K

3 transactions

Trade Summary

On Aug 20, 2026 through Aug 24, 2026, Gilde Healthcare Holding B.V., Insider, sold $567.4K of SHOULDER INNOVATIONS, INC. (SI) across 3 transactions. The filing covers Common Stock and reflects net selling of $567.4K. Reported prices ranged from $22.60 to $22.62. Insider transactions are sourced from SEC Form 4 disclosures and should be reviewed alongside company fundamentals and the insider's broader trading history.

Price at the Time of the Trade

SI daily price with the insider's sale marked at $22.61.

Sold near the 6-month high · the stock trades 3% lower today.

Price data is delayed and provided for context only — not investment advice.

Insider Information

Name: Gilde Healthcare Holding B.V.
Role: Insider

Filing Details

Filing Date: Aug 24, 2026
Transaction Date: Aug 20, 2026
Accession Number: 0001193125-26-363913
Form Type: 4
Net Trading Amount: -$567.4K

Non-Derivative Transactions

Date	Security	Shares	Price	Type	Value
Aug 20, 2026	Common Stock	3,900	$22.60	Sale	$88.1K
Aug 21, 2026	Common Stock	20,516	$22.61	Sale	$463.9K
Aug 24, 2026	Common Stock	681	$22.62	Sale	$15.4K

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Footnotes

(F1)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). Geoff Pardo is a partner at Gilde and may be deemed to share voting and dispositive power with respect to the shares held of record by Gilde. Mr. Pardo disclaims beneficial ownership of such holdings, except to the extent of his pecuniary interest in the shares.
(F2)This figure is the weighted average sales price of multiple trades ranging from $22.60 to $22.67 per share. The Reporting Person undertakes to provide the Staff of the Securities and Exchange Commission, Shoulder Innovations, Inc. or any security holder of Shoulder Innovations, Inc. full information about the number of shares sold at each separate price upon request.
(F3)This figure is the weighted average sales price of multiple trades ranging from $22.60 to $22.78 per share. The Reporting Person undertakes to provide the Staff of the Securities and Exchange Commission, Shoulder Innovations, Inc. or any security holder of Shoulder Innovations, Inc. full information about the number of shares sold at each separate price upon request.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Gilde Healthcare Holding B.V.

(Last)

(First)

(Middle)

STADSPLATEAU 36

(Street)

UTRECHT

3521 AZ

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
SHOULDER INNOVATIONS, INC. [ SI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	08/20/2026		S		3,900	D	$22.6	2,208,307	I⁽¹⁾	See footnote⁽¹⁾
Common Stock	08/21/2026		S		20,516	D	$22.61⁽²⁾	2,187,791	I⁽¹⁾	See footnote⁽¹⁾
Common Stock	08/24/2026		S		681	D	$22.62⁽³⁾	2,187,110	I⁽¹⁾	See footnote⁽¹⁾

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. 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). Geoff Pardo is a partner at Gilde and may be deemed to share voting and dispositive power with respect to the shares held of record by Gilde. Mr. Pardo disclaims beneficial ownership of such holdings, except to the extent of his pecuniary interest in the shares.

2. This figure is the weighted average sales price of multiple trades ranging from $22.60 to $22.67 per share. The Reporting Person undertakes to provide the Staff of the Securities and Exchange Commission, Shoulder Innovations, Inc. or any security holder of Shoulder Innovations, Inc. full information about the number of shares sold at each separate price upon request.

3. This figure is the weighted average sales price of multiple trades ranging from $22.60 to $22.78 per share. The Reporting Person undertakes to provide the Staff of the Securities and Exchange Commission, Shoulder Innovations, Inc. or any security holder of Shoulder Innovations, Inc. full information about the number of shares sold at each separate price upon request.

	Gilde Healthcare Holding B.V., By: /s/ Edwin de Graaf, Managing Director	08/24/2026
	Gilde Healthcare V Management B.V., By: /s/ Edwin de Graaf, Managing Director	08/24/2026
	Cooperatieve Gilde Healthcare V U.A., By: /s/ Edwin de Graaf, Managing Director	08/24/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Form 4 as rendered by the SEC from accession 0001193125-26-363913.

SHOULDER INNOVATIONS, INC.

Trade Summary

Price at the Time of the Trade

Company Information

Insider Information

Filing Details

Non-Derivative Transactions

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Footnotes

SEC Form 4

SEC Filing

Price at the Time of the Trade

SEC Form 4