William A Koefoed insider trades: OneStream (OS) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where William reports to the SEC
Open-market buys and sales
12 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Dec 15, 2025 | OS | ↓ Sell | 9,571 | $17.73 | $170K | Direct | Dec 16, 2025 (1d) |
| Sep 15, 2025 | OS | ↓ Sell | 8,943 | $19.03 | $170K | Direct | Sep 16, 2025 (1d) |
| Jul 25, 2025 | OS | ↓ Sell | 25,000 | $25.00 | $625K | Direct | Jul 28, 2025 (3d) |
| Jun 25, 2025 | OS | ↓ Sell | 25,000 | $26.77 | $669K | Direct | Jun 27, 2025 (2d) |
| Jun 16, 2025 | OS | ↓ Sell | 9,354 | $27.90 | $261K | Direct | Jun 18, 2025 (2d) |
| Jun 11, 2025 | OS | ↓ Sell | 6,501 | $28.23 | $184K | Direct | Jun 12, 2025 (1d) |
| May 27, 2025 | OS | ↓ Sell | 25,000 | $28.76 | $719K | Direct | May 29, 2025 (2d) |
| Feb 18, 2025 | OS | ↓ Sell | 10,000 | $25.04 | $250K | Direct | Feb 20, 2025 (2d) |
| Jan 15, 2025 | OS | ↓ Sell | 10,000 | $26.57 | $266K | Direct | Jan 17, 2025 (2d) |
| Dec 13, 2024 | OS | ↓ Sell | 13,765 | $30.00 | $413K | Direct | Dec 17, 2024 (4d) |
| Jul 25, 2024 | OS | ↓ Sell | 20,000 | $18.85 | $377K | Direct | Jul 26, 2024 (1d) |
| Apr 28, 2016 | OZRK | ↑ Buy | 1,000 | $41.78 | $42K | Direct | Apr 29, 2016 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other OS insiders
Open-market trades in the last 12 months
About William A Koefoed's insider trades
William A Koefoed is Chief Financial Officer at OneStream (OS). Since Apr 28, 2016, William has reported 1 open-market purchase worth $42K and 11 sales worth $4.1M on SEC Form 4. In the last 12 months: 1 sale ($170K).
Their filings also include option exercises (6 filings), grants and awards (4 filings), shares withheld for taxes (2 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every OS insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.