FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Expires: December 31, 2014 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person * Shea Thomas Anthony (Last) (First) (Middle) C/O ONESTREAM, INC. 191 N. CHESTER STREET (Street) BIRMINGHAM MI 48009 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol OneStream, Inc. [ OS ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner X Officer (give title below) Other (specify below) CEO and President
	3. Date of Earliest Transaction (Month/Day/Year) 06/10/2025
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	06/10/2025		C (1)		150	A	(1)	506,767 (2)	D
Class A Common Stock	06/11/2025		S (3)		9,913	D	$ 28.23	496,854 (2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Class D Common Stock	$ 0	06/10/2025		C (1)			150	(4)	(4)	Class A Common Stock	150	$ 0	3,894,049 (5)	D
Class D Common Stock	$ 0							(4)	(4)	Class A Common Stock	4,750,002		4,750,002 (5)	I	See footnote (6)
Class D Common Stock	$ 0							(4)	(4)	Class A Common Stock	7,525,803		7,525,803	I	See footnote (7)

Explanation of Responses:

1. The Class A Common Stock was acquired upon the conversion, at the holder's election, of Class D Common Stock held by the holder on a 1:1 basis.

2. The shares reported include unvested restricted stock units.

3. Represents the number of shares required to be sold to cover the statutory tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of statutory tax withholding obligations in connection with the vesting of restricted stock units to be funded by a "sell to cover" transaction and does not represent a discretionary sale by the Reporting Person.

4. The Class D Common Stock is convertible at any time, at the holder's election, into Class A Common Stock on a 1:1 basis. Each outstanding share of Class D Common Stock will automatically convert into one share of Class A Common Stock upon the earlier of (i) any transfer, whether or not for value, except for certain transfers exempted by the Issuer's amended and restated certificate of incorporation, (ii) death or incapacity (if the holder is a natural person), provided that, with respect to the Reporting Person and his permitted transferees, conversion would be deferred for nine months following any such event, and (iii) the first trading day following the seventh anniversary of the Issuer's initial public offering.

5. On February 25, 2025, 340,736 shares of the Issuer's Class D Common Stock registered in the name of The Thomas A. Shea 2020 Annuity Trust dated December 23, 2020 (the "2020 Shea Annuity Trust") were transferred to the Reporting Person.

6. Shares held of record by the 2020 Shea Annuity Trust. The Reporting Person's spouse serves as the trustee for the 2020 Shea Annuity Trust. By virtue of his relationship, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by the 2020 Shea Annuity Trust.

7. Shares held of record by the Shea Family Trust dated December 25, 2019 (the "2019 Shea Family Trust"). The Reporting Person's spouse serves as the co-trustee for the 2019 Shea Family Trust. By virtue of his relationship, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by the 2019 Shea Family Trust.

	/s/ Holly Koczot, attorney-in-fact	06/12/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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