[144] OneStream, Inc. SEC Filing

Rhea-AI Filing Summary

Kenneth D. Hohenstein filed a notice of proposed sale under Rule 144 to sell 120,000 shares of Class A common stock of OS through Fidelity Brokerage Services LLC on 01/16/2026, listed on NASDAQ. The shares have an aggregate market value of 2838000.00 based on the figures shown, compared with 90,268,494 Class A shares outstanding. The securities to be sold were acquired on 01/16/2026 by cash exercises of stock options originally granted in 2022, 2023, and 2024 in amounts of 50,000, 30,000, and 40,000 shares. Over the prior three months, the same seller completed three separate sales of 40,000 Class A shares each, with reported gross proceeds of 673,849.00, 837,773.00, and 688,345.00.

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	120000	2838000.00	90268494	01/16/2026	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	01/16/2026	Option Granted - 06/30/2022	Issuer			50000	01/16/2026	Cash
Class A	01/16/2026	Option Granted - 03/26/2023	Issuer			30000	01/16/2026	Cash
Class A	01/16/2026	Option Granted - 03/11/2024	Issuer			40000	01/16/2026	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	10/16/2025	40000	673849.00
Kenneth D. Hohenstein 191 N. Chester Street Birmingham MI 48009	Class A	11/17/2025	40000	837773.00
Kenneth D. Hohenstein 191 N. Chester Street Birmingham MI 48009	Class A	12/16/2025	40000	688345.00

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)