OneStream (NYSE: OS) CRO sells 59,204 shares after option exercises

Rhea-AI Filing Summary

OneStream, Inc. Chief Revenue Officer Ken Hohenstein reported option exercises and share sales. On March 16–17, 2026, he exercised options covering 59,204 shares of Class A Common Stock at strike prices of $10.65 and $14.51 per share and received common stock.

Over the same two days, he sold a total of 59,204 shares in open-market transactions at prices of about $23.58–$23.62 per share, pursuant to a Rule 10b5-1 trading plan adopted on August 22, 2025. After these transactions, he directly holds 985,571 shares of Class A Common Stock, and indirectly holds 790,279 shares through the Hohenstein Purple Elephant 2019 Irrevocable Grantor Trust, over which he may be deemed to have voting and dispositive power.

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 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)
	Chief Revenue Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/16/2026

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	03/16/2026		M		9,204	A	$10.65	994,775(1)	D
Class A Common Stock	03/16/2026		M		40,000	A	$14.51	1,034,775(1)	D
Class A Common Stock	03/16/2026		S(2)		49,204	D	$23.58	985,571(1)	D
Class A Common Stock	03/17/2026		M		10,000	A	$10.65	995,571(1)	D
Class A Common Stock	03/17/2026		S(2)		10,000	D	$23.62	985,571(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	03/16/2026		M			9,204	(4)	12/04/2031	Class A Common Stock	9,204	$0	6	D
Stock Option (right to buy)	$14.51	03/16/2026		M			40,000	(5)	03/10/2034	Class A Common Stock	40,000	$0	340,322	D
Stock Option (right to buy)	$10.65	03/17/2026		M			10,000	(6)	03/05/2033	Class A Common Stock	10,000	$0	128,508	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 August 22, 2025.

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, 2023, 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.

5. One-fourth of the shares subject to the option vested on February 15, 2025, 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.

6. 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	03/18/2026
	** 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 insider transactions did OneStream (OS) CRO Ken Hohenstein report?

Ken Hohenstein exercised stock options for 59,204 OneStream shares, then sold 59,204 shares in open-market trades. These trades occurred on March 16–17, 2026, and were reported as routine derivative exercises followed by sales of the acquired Class A Common Stock.

At what prices did OneStream (OS) CRO Ken Hohenstein exercise options and sell shares?

He exercised options at strike prices of $10.65 and $14.51 per share and sold the resulting shares at about $23.58–$23.62 per share. This reflects an exercise‑and‑sell pattern where derivative securities are converted into common stock and then sold in the market.

How many OneStream (OS) shares did Ken Hohenstein sell in this Form 4 filing?

He sold a total of 59,204 shares of OneStream Class A Common Stock. The sales were executed in open‑market or private transactions on March 16–17, 2026, as disclosed with transaction code “S” and labeled as sales in open market or private transactions.

How many OneStream (OS) shares does Ken Hohenstein hold after these transactions?

Following the reported trades, he directly holds 985,571 shares of Class A Common Stock. In addition, he indirectly holds 790,279 shares through the Hohenstein Purple Elephant 2019 Irrevocable Grantor Trust, over which he may be deemed to have voting and dispositive power.

Were Ken Hohenstein’s OneStream (OS) share sales made under a Rule 10b5-1 plan?

Yes. A footnote states the sales disclosed in this Form 4 were effected under a Rule 10b5‑1 trading plan adopted on August 22, 2025. Such plans pre‑schedule trades, indicating these sales followed a pre‑arranged program rather than discretionary timing.

What type of securities did Ken Hohenstein exercise in the OneStream (OS) Form 4?

He exercised stock options, described as “Stock Option (right to buy)” with underlying Class A Common Stock. The exercised options covered 59,204 underlying shares at exercise prices of $10.65 and $14.51, resulting in newly acquired common shares later sold in the market.