[Form 4] OneStream, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Ken Hohenstein, Chief Revenue Officer of OneStream, reported significant insider trading activity on June 18, 2025. The transactions involved:

• Exercise of stock options for 20,000 shares at $10.65 per share
• Immediate sale of the acquired 20,000 shares at $28.28 per share, executed under a Rule 10b5-1 trading plan established November 13, 2024

Following these transactions, Hohenstein holds 1,003,163 shares directly (including unvested RSUs) and 790,279 shares indirectly through the Hohenstein Purple Elephant Trust. He retains 258,508 stock options with an exercise price of $10.65, expiring March 5, 2033. The options vest monthly, with initial 25% vesting on February 15, 2024.

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
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).

X

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^*

Hohenstein Ken

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
06/18/2025

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	06/18/2025		M		20,000	A	$10.65	1,023,163(1)	D
Class A Common Stock	06/18/2025		S(2)		20,000	D	$28.28	1,003,163(1)	D
Class A Common Stock								790,279	I	See Footnote(3)

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
Stock Option (right to buy)	$10.65	06/18/2025		M			20,000	(4)	03/05/2033	Class A Common Stock	20,000	$0	258,508	D

Explanation of Responses:

1. The shares reported include unvested restricted stock units.

2. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 13, 2024.

3. Shares held by the Hohenstein Purple Elephant 2019 Irrevocable Grantor Trust (the "Hohenstein Purple Elephant Trust"). The Reporting Person may be deemed to have voting and dispositive power over the shares held by the Hohenstein Purple Elephant Trust.

4. One-fourth of the shares subject to the option vested on February 15, 2024, and 1/48th of the shares subject to the option shall vest each month thereafter, subject to the Reporting Person continuing to be a service provider through the applicable vesting date.

	/s/ Holly Koczot, attorney-in-fact	06/23/2025
	** 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.

FAQ

How many OS shares did Ken Hohenstein sell on June 18, 2025?

Ken Hohenstein, OneStream's Chief Revenue Officer, sold 20,000 shares of Class A Common Stock at a price of $28.28 per share on June 18, 2025. This sale was executed pursuant to a Rule 10b5-1 trading plan established on November 13, 2024.

What was the total value of OS shares sold by Ken Hohenstein in this transaction?

The total value of shares sold was approximately $565,600 (20,000 shares at $28.28 per share). These shares were first acquired through the exercise of stock options at $10.65 per share before being sold.

How many OS shares does Ken Hohenstein still own after this transaction?

After the transaction, Ken Hohenstein beneficially owns 1,793,442 shares total, consisting of 1,003,163 shares held directly (including unvested RSUs) and 790,279 shares held indirectly through the Hohenstein Purple Elephant 2019 Irrevocable Grantor Trust.

What stock options does Ken Hohenstein still hold in OS?

Following the transaction, Hohenstein still holds 258,508 stock options with an exercise price of $10.65 and an expiration date of March 5, 2033. These options vest over time, with one-fourth having vested on February 15, 2024, and 1/48th vesting monthly thereafter.

Was Ken Hohenstein's OS stock sale part of a planned transaction?

Yes, the sale was executed pursuant to a Rule 10b5-1 trading plan that Hohenstein established on November 13, 2024. Such plans are commonly used by insiders to establish predetermined trading schedules that comply with insider trading regulations.