| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Koefoed William A | Chief Financial Officer | C/O ONESTREAM, INC., 191 N. CHESTER STREET, BIRMINGHAM | /s/ Holly Koczot, attorney-in-fact | 2025-09-12 | 0001642337 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | OS | Class A Common Stock | Tax liability | -$137K | -6.91K | -2.91% | $19.79 | 231K | Sep 10, 2025 | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | Represents shares that have been withheld by the Issuer to satisfy the Reporting Person's tax withholding and remittance obligations in connection with the net settlement of restricted stock units and does not represent a sale by the Reporting Person. |
| F2 | The shares reported include unvested restricted stock units. |