Paul Buckman - 13 Mar 2026 Form 4 Insider Report for SHOULDER INNOVATIONS, INC. (SI)

Reporting relationship: Director
Issuer ticker: SI
Reported as of: 13 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Mar 2026, 17:38:10 UTC
Prior SEC filing: 05 Aug 2025
Next SEC filing: 02 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Jeffrey Points, as Attorney-in-Fact

Key filing fact

Paul Buckman filed Form 4 for SHOULDER INNOVATIONS, INC. (SI) on 17 Mar 2026.

Key facts

This page summarizes Paul Buckman's Form 4 filing for SHOULDER INNOVATIONS, INC. (SI).
6 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 17 Mar 2026, 17:38.

Change

Previous filing in this sequence was filed on 05 Aug 2025.
Current net transaction value: $0.

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 0001215243 Primary reporting owner

BUCKMAN PAUL

Relationship: 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: 17 Mar 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: +19,401
Change %: +97%
Price: $2.48^*
Shares after: 39,505
Date: 13 Mar 2026
Ownership: Direct
Footnotes: F1

SI transaction

Common Stock

Options Exercise

Transaction value
Shares: +26,205
Change %: +66%
Price: $2.10^*
Shares after: 65,710
Date: 13 Mar 2026
Ownership: Direct

SI transaction

Common Stock

Tax liability

Transaction value
Shares: -3,292
Change %: -5%
Price: $14.62^*
Shares after: 62,418
Date: 13 Mar 2026
Ownership: Direct

SI transaction

Common Stock

Tax liability

Transaction value
Shares: -3,714
Change %: -6%
Price: $14.82^*
Shares after: 58,704
Date: 13 Mar 2026
Ownership: Direct

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: -19,401
Change %: -94%
Price: $0.000000^*
Shares after: 1,142
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 19,401
Exercise price: $2.48
Footnotes: F2

SI transaction Derivative

Stock Option

Options Exercise

Transaction value
Shares: -26,205
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 26,205
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 the following shares received without consideration as in-kind distributions: (i) 3,144 shares from cultivate(MD) Capital Accelerator Fund, L.P.; and (ii) 3,096 shares from Cultivate MD Capital Fund II, LP. In prior reports, the reporting person reported beneficial ownership of 13,864 shares of Shoulder Innovations common stock held directly.

Footnote F2

The stock option vests in 36 equal monthly increments beginning on June 30, 2023.

Footnote F3

The stock option is fully vested and currently exercisable.