OS (NASDAQ: OS) affiliate reports sale of 229,204 Class A shares and optioned 10,000

Rhea-AI Filing Summary

OS affiliate filings report proposed and completed sales of Class A shares. The notice lists an option grant of 10,000 Class A shares (optioned 03/06/2023) with an intended sale date 03/17/2026. It also reports prior sales by Kenneth D. Hohenstein of 120,000, 60,000 and 49,204 Class A shares on 01/16/2026, 02/17/2026 and 03/16/2026, respectively, with gross amounts shown alongside each transaction.

Insights

Securities Compliance Counsel

Form 144 records affiliate sales and an option‑based sale plan.

The filing lists an option grant of 10,000 Class A shares intended to be sold on 03/17/2026. It also documents recent open‑market or block sales by Kenneth D. Hohenstein totaling 229,204 shares across three dates, with dollar figures reported in the excerpt.

These entries are routine compliance disclosures required when affiliates offer or sell securities; cash‑flow treatment and selling methods are shown as dollar amounts per trade in the excerpt.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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
Class A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	10000	236200.00	99803647	03/17/2026	NASDAQ

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 *
Class A	03/17/2026	Option Granted - 03/06/2023	Issuer			10000	03/17/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Kenneth D. Hohenstein 191 N. Chester Street Birmingham MI 48009	Class A	01/16/2026	120000	2835636.00
Kenneth D. Hohenstein 191 N. Chester Street Birmingham MI 48009	Class A	02/17/2026	60000	1407600.00
Kenneth D. Hohenstein 191 N. Chester Street Birmingham MI 48009	Class A	03/16/2026	49204	1160230.32

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the OS Form 144 disclose about the 03/17/2026 transaction?

The filing shows an option grant of 10,000 Class A shares tied to an intended sale date of 03/17/2026. The entry is labeled Option Granted - 03/06/2023 and lists Cash as the consideration method.

How many shares did Kenneth D. Hohenstein sell in the past three months?

The filing reports Kenneth D. Hohenstein sold 120,000, 60,000, and 49,204 Class A shares on 01/16/2026, 02/17/2026, and 03/16/2026, respectively, with gross amounts shown for each trade.

Are dollar amounts provided for the reported sales in the Form 144?

Yes. Each reported sale in the excerpt includes a dollar figure alongside the share count: for example, $2,835,636.00 appears with the 120,000 share sale on 01/16/2026, indicating gross proceeds reported for that transaction.

Does the Form 144 specify who receives the proceeds from the sales?

The excerpt lists gross dollar amounts per transaction but does not attach an explicit payee statement; the reported sales are affiliate transactions and the proceeds are presented as monetary figures alongside each dated sale entry.