Matthew Fraser Ahearn - 12 Jun 2026 Form 4 Insider Report for SHOULDER INNOVATIONS, INC. (SI)

Reporting relationship: Chief Operating Officer, Director
Issuer ticker: SI
Reported as of: 12 Jun 2026
Net transaction value: -$374,255
SEC form: 4
Accepted by SEC: 16 Jun 2026, 16:35:01 UTC
Prior SEC filing: 21 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Jeffrey Points, as Attorney-in-Fact

Key filing fact

Matthew Fraser Ahearn filed Form 4 for SHOULDER INNOVATIONS, INC. (SI) on 16 Jun 2026.

Key facts

This page summarizes Matthew Fraser Ahearn's Form 4 filing for SHOULDER INNOVATIONS, INC. (SI).
3 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 16 Jun 2026, 16:35.

Change

Previous filing in this sequence was filed on 21 Apr 2026.
Current net transaction value: -$374,255.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002070582 Primary reporting owner

Ahearn Matthew Fraser

Relationship: Chief Operating Officer, Director
Address: C/O SHOULDER INNOVATIONS, INC., 1535 STEELE AVENUE SW, SUITE B, GRAND RAPIDS
Signature: /s/ Jeffrey Points, as Attorney-in-Fact
Signature date: 16 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SI transaction

Common Stock

Sale

Transaction value: $296,185
Shares: -15,856
Change %: -5.5%
Price: $18.68
Shares after: 273,320
Date: 12 Jun 2026
Ownership: Direct
Footnotes: F1, F2, F3

SI transaction

Common Stock

Sale

Transaction value: $29,922
Shares: -1,644
Change %: -0.6%
Price: $18.20
Shares after: 271,676
Date: 15 Jun 2026
Ownership: Direct
Footnotes: F1, F4

SI transaction

Common Stock

Sale

Transaction value: $48,148
Shares: -2,500
Change %: -0.92%
Price: $19.26
Shares after: 269,176
Date: 15 Jun 2026
Ownership: Direct
Footnotes: F1, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 5 footnotes

Footnote F1

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 13, 2026.

Footnote F2

The price reported in Column 4 is a weighted average sale price. The shares of Common Stock were sold in multiple transactions at prices ranging from $18.29 to $19.00, inclusive. The Reporting Person undertakes to provide upon request by the staff of the Securities & Exchange Commission, the Issuer or any security holder of the Issuer, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth herein.

Footnote F3

Includes the following shares received without consideration as an in-kind distribution: 2,411 shares from Genesis Investment Holdings. In prior reports, the reporting person reported beneficial ownership of 286,765 shares of Shoulder Innovations common stock held directly.

Footnote F4

The price reported in Column 4 is a weighted average sale price. The shares of Common Stock were sold in multiple transactions at prices ranging from $17.98 to $18.88, inclusive. The Reporting Person undertakes to provide upon request by the staff of the Securities & Exchange Commission, the Issuer or any security holder of the Issuer, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth herein.

Footnote F5

The price reported in Column 4 is a weighted average sale price. The shares of Common Stock were sold in multiple transactions at prices ranging from $18.98 to $19.71, inclusive. The Reporting Person undertakes to provide upon request by the staff of the Securities & Exchange Commission, the Issuer or any security holder of the Issuer, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth herein.