Koefoed William A - Insider Non-Derivative Transactions at OneStream, Inc. (OS) - (SEC)
Updated on January 3, 2026.
According to recent SEC insider information filed on Dec 15, 2025, Koefoed William A's relationship to OneStream, Inc. (OS) is Officer (Chief Financial Officer), and currently has 206,127 shares of Class A Common Stock.
The chart below shows the number of shares owned, and the table shows the recent insider transactions.
You can see similar information for other OS insiders.
Related Topics: SEC Topic List.
Data Source: SEC.
Koefoed William A - Insider Non-Derivative Transactions of OS Class A Common Stock
Koefoed William A - Insider Non-Derivative Transactions at OS
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| Date | Transaction | No. of Shares | Price Per Share | Shares Owned After Transactions |
|---|---|---|---|---|
| Dec 16, 2025 | Sell -- (Class A Common Stock) | 9571 | 17.73 | 206127 |
| Dec 11, 2025 | F -- (Class A Common Stock) | 6285 | 18.38 | 215698 |
| Sep 16, 2025 | Sell -- (Class A Common Stock) | 8943 | 19.03 | 221983 |
| Sep 11, 2025 | F -- (Class A Common Stock) | 6913 | 19.79 | 230926 |
| Jul 26, 2025 | Sell -- (Class A Common Stock) | 25000 | 25 | 237839 |
| Jul 26, 2025 | M -- (Class A Common Stock) | 25000 | 10.65 | 262839 |
| Jun 26, 2025 | Sell -- (Class A Common Stock) | 25000 | 26.77 | 237839 |
| Jun 26, 2025 | M -- (Class A Common Stock) | 25000 | 10.65 | 262839 |
| Jun 17, 2025 | Sell -- (Class A Common Stock) | 9354 | 27.9 | 237839 |
| Jun 12, 2025 | Sell -- (Class A Common Stock) | 6501 | 28.23 | 247193 |
| May 28, 2025 | Sell -- (Class A Common Stock) | 25000 | 28.76 | 253694 |
| May 28, 2025 | M -- (Class A Common Stock) | 25000 | 10.65 | 278694 |
| Mar 11, 2025 | Acquisition -- (Class A Common Stock) | 253694 | 0 | 253694 |
| Feb 19, 2025 | Sell -- (Class A Common Stock) | 10000 | 25.04 | 0 |
| Feb 19, 2025 | M -- (Class A Common Stock) | 10000 | 10.65 | 10000 |
| Jan 16, 2025 | Sell -- (Class A Common Stock) | 10000 | 26.57 | 0 |
| Jan 16, 2025 | M -- (Class A Common Stock) | 10000 | 10.65 | 10000 |
| Dec 14, 2024 | Sell -- (Class A Common Stock) | 6196 | 30.52 | 0 |
| Dec 14, 2024 | Sell -- (Class A Common Stock) | 7569 | 29.57 | 6196 |
| Dec 14, 2024 | M -- (Class A Common Stock) | 13765 | 10.65 | 13765 |
| Jul 26, 2024 | Sell -- (Class A Common Stock) | 20000 | 18.85 | 0 |
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