OneStream (OS) CRO exercises options, then sells 60,000 shares

Rhea-AI Filing Summary

OneStream, Inc. Chief Revenue Officer Ken Hohenstein reported option exercises and share sales. On February 17, 2026, he exercised stock options covering 60,000 shares of Class A common stock at exercise prices of $10.65 and $14.51 per share, and then sold 60,000 shares of Class A common stock at $23.46 per share in an open-market transaction effected under a Rule 10b5-1 trading plan adopted on August 22, 2025. Following these transactions, he directly held 990,961 shares of Class A common stock and also had indirect ownership of 790,279 shares, which includes shares held by the Hohenstein Purple Elephant 2019 Irrevocable Grantor Trust and unvested restricted stock units.

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).

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)
02/17/2026

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	02/17/2026		M		20,000	A	$10.65	1,010,961(1)	D
Class A Common Stock	02/17/2026		M		40,000	A	$14.51	1,050,961(1)	D
Class A Common Stock	02/17/2026		S(2)		60,000	D	$23.46	990,961(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	02/17/2026		M			10,000	(4)	03/05/2033	Class A Common Stock	10,000	$0	138,508	D
Stock Option (right to buy)	$10.65	02/17/2026		M			10,000	(5)	12/04/2031	Class A Common Stock	10,000	$0	9,210	D
Stock Option (right to buy)	$14.51	02/17/2026		M			40,000	(6)	03/10/2034	Class A Common Stock	40,000	$0	380,322	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, 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.

5. 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.

6. 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.

	/s/ Holly Koczot, attorney-in-fact	02/19/2026
	** 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).
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FAQ

What insider transactions did OneStream (OS) CRO Ken Hohenstein report?

Ken Hohenstein reported exercising stock options for 60,000 Class A common shares and selling 60,000 shares. The sale was executed at $23.46 per share under a pre-established Rule 10b5-1 trading plan adopted on August 22, 2025.

How many OneStream (OS) shares did the CRO sell and at what price?

The Chief Revenue Officer sold 60,000 shares of OneStream Class A common stock at $23.46 per share. The transaction was an open-market sale carried out pursuant to a Rule 10b5-1 trading plan adopted on August 22, 2025.

What was the result of the OneStream (OS) CRO’s stock option exercises?

He exercised stock options that resulted in acquiring 60,000 shares of Class A common stock at exercise prices of $10.65 and $14.51 per share. These exercises were reported as derivative conversions on February 17, 2026, increasing his direct common stock holdings before the sale.

How many OneStream (OS) shares does the CRO own after these transactions?

After the reported transactions, the Chief Revenue Officer directly owned 990,961 shares of Class A common stock and indirectly owned 790,279 shares. The indirect holdings include shares held by the Hohenstein Purple Elephant 2019 Irrevocable Grantor Trust and unvested restricted stock units.

Was the OneStream (OS) insider sale part of a trading plan?

Yes, the 60,000-share sale by the Chief Revenue Officer was executed under a Rule 10b5-1 trading plan. This trading plan was adopted on August 22, 2025, allowing pre-arranged transactions independent of day-to-day market conditions.