Robert Joseph Ball - 14 Sep 2026 Form 4 Insider Report for SHOULDER INNOVATIONS, INC. (SI)

Reporting relationship: CEO & Executive Chairman, Director
Issuer ticker: SI
Reported as of: 14 Sep 2026
Net transaction value: -$187,706
SEC form: 4
Accepted by SEC: 14 Sep 2026, 20:23:05 UTC
Prior SEC filing: 30 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Jeffrey Points, as Attorney-in-Fact

Key filing fact

Robert Joseph Ball filed Form 4 for SHOULDER INNOVATIONS, INC. (SI) on 14 Sep 2026.

Key facts

This page summarizes Robert Joseph Ball's Form 4 filing for SHOULDER INNOVATIONS, INC. (SI).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 14 Sep 2026, 20:23.

Change

Previous filing in this sequence was filed on 30 Apr 2026.
Current net transaction value: -$187,706.

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 0002070664 Primary reporting owner

Ball Robert Joseph

Relationship: CEO & Executive Chairman, 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: 14 Sep 2026

Reported non-derivative transactions

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

SI transaction

Common Stock

Options Exercise

Transaction value
Shares: +89,233
Change %: +30%
Price: $2.10^*
Shares after: 390,999
Date: 14 Sep 2026
Ownership: Direct
Footnotes: F1

SI transaction

Common Stock

Sale

Transaction value: $187,706
Shares: -10,175
Change %: -2.6%
Price: $18.45
Shares after: 380,824
Date: 14 Sep 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SI transaction Derivative

Stock Option

Options Exercise

Transaction value
Shares: -89,233
Change %: -49%
Price: $0.000000^*
Shares after: 92,143
Date: 14 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 89,233
Exercise price: $2.10
Footnotes: F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Includes 1,748 shares of Common Stock acquired on June 30, 2026 pursuant to the Issuer's 2025 Employee Stock Purchase Plan.

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 $18.22 to $18.63, 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. The shares of Common Stock were sold solely to cover the exercise price in connection with the exercise of the stock option.

Footnote F3

The stock option is fully vested and currently exercisable.