[Form 4] OneStream, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Form 4 discloses that Ken Hohenstein, Chief Revenue Officer of OneStream, Inc. (OS), executed and sold shares on 18 Jul 2025.

• Option exercise: 20,000 stock options were exercised at $10.65 (grant dated 5 Mar 2023; 25% vested 15 Feb 2024, remaining vest monthly).
• Open-market sale: The same 20,000 shares were sold at $25.12 under a Rule 10b5-1 plan adopted 13 Nov 2024.

Post-transaction holdings:

• Direct: 1,003,163 Class A shares (includes unvested RSUs).
• Indirect: 790,279 shares held by the Hohenstein Purple Elephant 2019 Irrevocable Grantor Trust.
• Options remaining: 238,508 shares.

The filing reflects no change in net share count from the option exercise/sale pair, but it shows the insider retains a substantial equity stake exceeding 1.79 million shares (direct + indirect) plus unexercised options.

Insights

Equity Research Analyst

TL;DR: Routine option exercise with matched sale; insider still holds >1 M shares—signal neutral.

The CRO converted 20 k options at $10.65 and immediately sold the shares at $25.12, locking in roughly $290 k gross proceeds. Because the same share count was exercised and disposed, there is no incremental buying or selling pressure on the float beyond this one-day volume. Remaining direct ownership of 1.0 M shares plus 238 k options indicates continued alignment with shareholders. The use of a pre-arranged 10b5-1 plan lowers concerns about opportunistic timing. Overall, the transaction appears ordinary course compensation management rather than a directional bet.

Corporate Governance Specialist

TL;DR: 10b5-1 structured sale limits governance risk; stake remains meaningful.

The filing confirms that the officer’s sale was executed under a Rule 10b5-1 plan established months prior, satisfying best-practice safeguards against insider trading allegations. Retention of over 1.8 M combined shares and an ongoing vesting schedule suggest long-term involvement. No red flags—such as sudden bulk liquidation or termination of Section 16 status—are present, so governance impact is minimal.

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).

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)
07/18/2025

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	07/18/2025		M		20,000	A	$10.65	1,023,163(1)	D
Class A Common Stock	07/18/2025		S(2)		20,000	D	$25.12	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	07/18/2025		M			20,000	(4)	03/05/2033	Class A Common Stock	20,000	$0	238,508	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	07/21/2025
	** 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 OneStream (OS) shares did Ken Hohenstein sell?

He sold 20,000 Class A common shares on 18 Jul 2025.

At what price were the OS shares sold and the options exercised?

Shares were sold at $25.12; options were exercised at $10.65 per share.

What is Ken Hohenstein’s remaining direct ownership in OneStream?

After the transaction he directly owns 1,003,163 shares, including unvested RSUs.

Does the Form 4 indicate the use of a 10b5-1 trading plan?

Yes. The sale was executed under a Rule 10b5-1 plan adopted 13 Nov 2024.

How many options does the insider still hold after this filing?

He retains 238,508 unexercised options with an exercise price of $10.65.