David Dieter insider trades: Collegium Pharmaceutical (COLL) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where David reports to the SEC
Open-market buys and sales
2 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Mar 18, 2026 | COLL | ↓ Sell | 13,976 | $34.92 | $488K | Direct | Mar 20, 2026 (2d) |
| Mar 9, 2026 | COLL | ↓ Sell | 6,224 | $36.65 | $228K | Direct | Mar 11, 2026 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other COLL insiders
Open-market trades in the last 12 months
About David Dieter's insider trades
David Dieter is EVP & General Counsel at Collegium Pharmaceutical (COLL). Since Mar 9, 2026, David has reported no open-market purchases and 2 sales worth $716K on SEC Form 4. In the last 12 months: 2 sales ($716K).
Their filings also include shares withheld for taxes (2 filings), grants and awards (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 COLL insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.