Jonathan D. Mariner - May 21, 2025 Form 4 Insider Report for OneStream, Inc. (OS)

Role: Director
Signature: /s/ Holly Koczot, attorney-in-fact
Stock symbol: OS
Transactions as of: May 21, 2025
Transactions value $: $0
Form type: 4
Date filed: 5/22/2025, 08:02 PM
Previous filing: Mar 26, 2025
Next filing: Jun 4, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
MARINER JONATHAN D	Director	C/O ONESTREAM, INC., 191 N. CHESTER STREET, BIRMINGHAM	/s/ Holly Koczot, attorney-in-fact	2025-05-22	0001063663

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	OS	Class A Common Stock	Award	$0	+7.13K	+15.36%	$0.00	53.5K	May 21, 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents an equal number of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock on the date it vests. The RSUs will vest in full on the earlier of the one-year anniversary of the RSUs grant date or the day immediately prior to the date of the next annual meeting of the Issuer's stockholders that occurs after the RSUs grant date, subject to the Reporting Person continuing to be an Outside Director (as defined in the Issuer's Outside Director Compensation Policy) through such vesting date.

Content

Represents an equal number of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock on the date it vests. The RSUs will vest in full on the earlier of the one-year anniversary of the RSUs grant date or the day immediately prior to the date of the next annual meeting of the Issuer's stockholders that occurs after the RSUs grant date, subject to the Reporting Person continuing to be an Outside Director (as defined in the Issuer's Outside Director Compensation Policy) through such vesting date.