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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1889956	Onestream Inc.	OS	Services-Prepackaged Software (7372)	873199478

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
2031265	Ken Hohenstein	C/O Onestream, Inc. 191 N. Chester Street Birmingham MI 48009	Chief Revenue Officer	No	No	No	No

Transaction Summary

Sold:	20,000 shares	Avg. Price: $28.28	Total Value: $565,600.00
Number of Shares After Transactions:	1,003,163 shares

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Class A Common Stock	Acquisiton	2025-06-18	20,000	$10.65	1,023,163	No	4	M	Direct
Class A Common Stock	Disposition	2025-06-18	20,000	$28.28	1,003,163	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Class A Common Stock	Stock Option (right to buy)	Disposition	2025-06-18	20,000	$0.00	20,000	$10.65

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
258,508		2033-03-05	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Class A Common Stock	790,279	Indirect	See Footnote

Footnotes

The shares reported include unvested restricted stock units.
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.
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.
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.