Shoulder Innovations holder to sell 10,175 shares

SHOULDER INNOVATIONS, INC.

Rhea-AI Filing Summary

SHOULDER INNOVATIONS, INC. (SI) received a Rule 144 notice from stockholder Robert Joseph Ball covering a proposed sale of up to 10,175 shares of common stock through Morgan Stanley Smith Barney LLC on or after September 14, 2026. The shares have an aggregate market value of $187,706.37 and are part of an outstanding total of 20,819,000 common shares. The shares to be sold were acquired for cash in private acquisitions from the issuer or an affiliate on March 6, 2025 (4,386 shares), June 20, 2025 (3,289 shares), and July 9, 2025 (2,500 shares).

Key Figures

Shares to be sold: 10,175 shares Aggregate market value of shares to be sold: $187,706.37 Shares outstanding: 20,819,000 shares +4 more

7 metrics

Shares to be sold 10,175 shares Maximum SHOULDER INNOVATIONS, INC. common shares covered by the Rule 144 notice

Aggregate market value of shares to be sold $187,706.37 Reported market value of the 10,175 shares covered by the planned sale

Shares outstanding 20,819,000 shares Common shares of SHOULDER INNOVATIONS, INC. reported as outstanding

Acquisition lot 1 4,386 shares Private acquisition from issuer or affiliate on March 6, 2025 for cash

Acquisition lot 2 3,289 shares Private acquisition from issuer or affiliate on June 20, 2025 for cash

Acquisition lot 3 2,500 shares Private acquisition from issuer or affiliate on July 9, 2025 for cash

Approximate sale date September 14, 2026 Planned date for the Rule 144 sale on the NYSE

Key Terms

Rule 144, Private Acquisition from Issuer/Affiliate, aggregate market value

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Private Acquisition from Issuer/Affiliate financial

"Common | 03/06/2025 | Private Acquisition from Issuer/Affiliate | Issuer"

aggregate market value financial

"Common ... | 10175 | 187706.37 | 20819000 | 09/14/2026 | NYSE"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing disclose for SHOULDER INNOVATIONS, INC. (SI)?

It discloses that stockholder Robert Joseph Ball plans a Rule 144 sale of up to 10,175 shares of SHOULDER INNOVATIONS, INC. common stock, with an aggregate market value of $187,706.37, through Morgan Stanley Smith Barney LLC.

How many SHOULDER INNOVATIONS, INC. (SI) shares are proposed to be sold under this Form 144?

The notice covers a proposed sale of up to 10,175 common shares of SHOULDER INNOVATIONS, INC., corresponding to an aggregate market value of $187,706.37 as reported in the Form 144.

When were the SHOULDER INNOVATIONS, INC. (SI) shares to be sold acquired?

The shares were acquired in private acquisitions from the issuer or an affiliate for cash on three dates: 4,386 shares on March 6, 2025, 3,289 shares on June 20, 2025, and 2,500 shares on July 9, 2025.

What is the approximate sale date for the SHOULDER INNOVATIONS, INC. (SI) shares in this Form 144?

The Form 144 lists an approximate sale date of September 14, 2026 for the proposed sale of SHOULDER INNOVATIONS, INC. common stock, with the shares to be sold on the NYSE.

How many SHOULDER INNOVATIONS, INC. (SI) shares are reported outstanding in the Form 144?

The filing reports that there are 20,819,000 common shares of SHOULDER INNOVATIONS, INC. outstanding, which is presented as context for the 10,175 shares covered by the planned Rule 144 sale.

Which broker is named in the SHOULDER INNOVATIONS, INC. (SI) Form 144 filing?

The planned Rule 144 sale will be executed through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, as disclosed in the Form 144.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/14/2026 - 04:20 PM Accepted by SEC EDGAR 09/14/2026 - 04:19 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002070664
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	SHOULDER INNOVATIONS, INC.
SEC File Number	001-42771
Address of Issuer	1535 Steele Avenue SW Grand Rapids MICHIGAN 49507
Phone	616-294-1026
Name of Person for Whose Account the Securities are To Be Sold	ROBERT BALL
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	10175	187706.37	20819000	09/14/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/06/2025	Private Acquisition from Issuer/Affiliate	Issuer			4386	03/06/2025	Cash
Common	06/20/2025	Private Acquisition from Issuer/Affiliate	Issuer			3289	06/20/2025	Cash
Common	07/09/2025	Private Acquisition from Issuer/Affiliate	Issuer			2500	07/09/2025	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/14/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Robert Joseph Ball
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)