Douglas Kerr insider trades: Dyne Therapeutics (DYN) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Douglas reports to the SEC
Open-market buys and sales
14 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Sep 8, 2026 | DYN | ↓ Sell | 5,035 | $22.95 | $116K | Direct | Sep 8, 2026 (0d) |
| Aug 13, 2026 | DYN | ↓ Sell | 1,556 | $26.28 | $41K | Direct | Aug 17, 2026 (4d) |
| Jun 16, 2026 | DYN | ↓ Sell | 887 | $18.33 | $16K | Direct | Jun 17, 2026 (1d) |
| May 13, 2026 | DYN | ↓ Sell | 1,564 | $18.36 | $29K | Direct | May 14, 2026 (1d) |
| Mar 5, 2026 | DYN | ↓ Sell | 904 | $14.90 | $13K | Direct | Mar 6, 2026 (1d) |
| Dec 5, 2025 | DYN | ↓ Sell | 880 | $20.72 | $18K | Direct | Dec 5, 2025 (0d) |
| Sep 5, 2025 | DYN | ↓ Sell | 4,425 | $13.30 | $59K | Direct | Sep 8, 2025 (3d) |
| Jun 5, 2025 | DYN | ↓ Sell | 1,342 | $13.35 | $18K | Direct | Jun 6, 2025 (1d) |
| Mar 5, 2025 | DYN | ↓ Sell | 1,343 | $11.83 | $16K | Direct | Mar 7, 2025 (2d) |
| Jul 8, 2021 | GBIO | ↓ Sell | 3,518 | $25.20 | $89K | Direct | Jul 12, 2021 (4d) |
| Apr 5, 2021 | GBIO | ↓ Sell | 14,072 | $30.09 | $423K | Direct | Apr 7, 2021 (2d) |
| Mar 5, 2021 | GBIO | ↓ Sell | 11,267 | $31.44 | $354K | Direct | Mar 9, 2021 (4d) |
| Feb 8, 2021 | GBIO | ↓ Sell | 11,267 | $33.37 | $376K | Direct | Feb 10, 2021 (2d) |
| Jan 11, 2021 | GBIO | ↓ Sell | 11,267 | $27.58 | $311K | Direct | Jan 13, 2021 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other DYN insiders
Open-market trades in the last 12 months
About Douglas Kerr's insider trades
Douglas Kerr is Head of R&D and CMO at Dyne Therapeutics (DYN). Since Jan 11, 2021, Douglas has reported no open-market purchases and 14 sales worth $1.9M on SEC Form 4. In the last 12 months: 6 sales ($233K).
Their filings also include option exercises (13 filings), grants and awards (8 filings), shares withheld for taxes (8 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 DYN insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.