OneStream (OS) President granted 100,000 RSUs in new equity award

Rhea-AI Filing Summary

Leshinski Scott reported acquisition or exercise transactions in this Form 4 filing.

OneStream, Inc. President Scott Leshinski received an award of 100,000 restricted stock units (RSUs) of Class A Common Stock at no cash cost per share. Each RSU represents a contingent right to receive one share when it vests.

The RSUs will vest in eight equal installments, with 1/8 of the award vesting on each Quarterly Vesting Date beginning on June 10, 2026, as long as he continues as a service provider. Quarterly Vesting Dates are March 10, June 10, September 10, and December 10 each year.

After this grant, Leshinski is reported to hold 378,458 shares of Class A Common Stock directly, and this total includes unvested RSUs.

SEC Form 4

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
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Leshinski Scott

(Last) (First) (Middle)

C/O ONESTREAM, INC.

191 N. CHESTER STREET

(Street)

BIRMINGHAM MICHIGAN 48009

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
OneStream, Inc. [ OS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/19/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	03/19/2026		A		100,000(1)	A	$0	378,458(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

Explanation of Responses:

1. 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 as to 1/8th of the shares subject to the RSUs on each Quarterly Vesting Date (defined below) beginning on June 10, 2026, subject to the Reporting Person continuing to be a service provider through such date. "Quarterly Vesting Date" means March 10, June 10, September 10 and December 10 of each year.

2. The shares reported include unvested restricted stock units.

	/s/ Holly Koczot, attorney-in-fact	03/20/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did OneStream (OS) President Scott Leshinski report in this Form 4?

Scott Leshinski reported receiving 100,000 restricted stock units of Class A Common Stock as an equity award. The RSUs carry no cash purchase price and convert into shares only as they vest over time, subject to continued service.

How many OneStream (OS) RSUs were granted to Scott Leshinski?

The filing shows a grant of 100,000 restricted stock units to Scott Leshinski. Each RSU represents a contingent right to receive one share of Class A Common Stock upon vesting, creating a significant equity-based compensation component tied to his ongoing service.

What is the vesting schedule for Scott Leshinski’s OneStream (OS) RSUs?

The RSUs vest in eight equal parts, with 1/8 of the award vesting on each Quarterly Vesting Date starting June 10, 2026. Quarterly Vesting Dates are March 10, June 10, September 10, and December 10, contingent on his continued service.

Does Scott Leshinski pay for the OneStream (OS) RSU shares granted?

No, the Form 4 lists a price of $0.0000 per share for the 100,000 RSUs, indicating no cash payment is required. Instead, the units convert into shares over time as they vest, functioning as stock-based compensation rather than a market purchase.

How many OneStream (OS) shares does Scott Leshinski hold after this RSU grant?

After the reported transaction, Leshinski is shown holding 378,458 shares of Class A Common Stock directly. This figure includes unvested restricted stock units, reflecting both currently owned shares and RSUs scheduled to vest in the future under the award terms.

What conditions affect vesting of Scott Leshinski’s OneStream (OS) RSUs?

Vesting of the RSUs depends on Leshinski continuing to be a service provider through each Quarterly Vesting Date. If that condition is met, 1/8 of the 100,000 RSUs will vest on each scheduled March, June, September, and December 10 beginning June 10, 2026.