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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1889956	Onestream Inc.	OS	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1642337	A William Koefoed	C/O Onestream, Inc. 191 N. Chester Street Birmingham MI 48009	Chief Financial Officer	No	No	No	No

Transaction Summary

Sold:	25,000 shares	Avg. Price: $26.77	Total Value: $669,250.00
Number of Shares After Transactions:	237,839 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	2025-06-25	25,000	$10.65	262,839	No	4	M	Direct
Class A Common Stock	Disposition	2025-06-25	25,000	$26.77	237,839	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	2025-06-25	25,000	$0.00	25,000	$10.65

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
195,481		2031-12-04	No	4	M	Direct

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 February 21, 2025.
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.