Jonathan Mariner at OS (ticker: OS) plans sale of 7,956 shares of stock

Rhea-AI Filing Summary

Jonathan Mariner has filed a notice to sell OS common stock under Rule 144. The filing covers a planned sale of 7,956 shares of common stock through Goldman Sachs & Co. LLC, with an aggregate market value of $187,841.16, on or around 01/06/2026. The shares are listed for sale on NASD, and the issuer had 90,268,494 shares outstanding at the time indicated.

The shares to be sold were acquired on 07/27/2020 as compensation in the form of restricted stock units from the issuer, with the consideration described as compensation. The notice also reports that during the past three months, Mariner sold 18,423 shares of common stock on 12/02/2025, generating gross proceeds of $385,029.65. By signing, the seller represents that they do not know of any undisclosed material adverse information about the issuer’s operations.

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
Common Stock	Goldman Sachs & Co. LLC 200 West Street New York NY 10282	7956	187841.16	90268494	01/06/2026	NASD

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 Stock	07/27/2020	Acquired as compensation -- Restricted Stock Units	The Issuer			7956	07/27/2020	Compensation

* 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
Jonathan Mariner 191 N. Chester Street Birmingham MI 48009	Common Stock	12/02/2025	18423	385029.65

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

How many OS shares does Jonathan Mariner plan to sell under this Form 144?

The notice states that Jonathan Mariner plans to sell 7,956 shares of OS common stock, with an aggregate market value of $187,841.16.

How and when were the OS shares to be sold by Jonathan Mariner acquired?

The shares to be sold are OS common stock acquired on 07/27/2020 as compensation in the form of restricted stock units from the issuer, with the nature of payment listed as compensation.

Which broker is handling Jonathan Mariner’s planned OS share sale?

The filing lists Goldman Sachs & Co. LLC, located at 200 West Street, New York, NY 10282, as the broker for the planned sale of OS common stock.

On which exchange are the OS shares listed for this planned Rule 144 sale?

The notice identifies NASD as the securities exchange for the planned sale of OS common stock under Rule 144.

How many OS shares has Jonathan Mariner sold in the past three months?

During the past three months, the filing reports that Jonathan Mariner sold 18,423 shares of OS common stock on 12/02/2025, with gross proceeds of $385,029.65.

What representation does the seller make in this OS Form 144 notice?

By signing the notice, the seller represents that they do not know any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed, and this also applies as of any Rule 10b5-1 plan adoption date if used.