Dirk Kersten is Director at Dyne Therapeutics, Inc. (DYN). They have made 6 open-market trades across 1 company since 2020, most recently 2026-07-27.
CIK 0001823682
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
1 open-market purchase totalling $55.0M since 2020, against 5 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| DYN | 3,586,796 | $51.1M |
Shares reported on the most recent Form 4, priced at the 2026-07-29 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| DYN | SELL · 10b5-1 | 2026-07-27 | 2026-07-29 | $25.51 | $6.7M | +6.4% | +0.7% | — |
| DYN | SELL · 10b5-1 | 2026-06-22 | 2026-06-24 | $20.70 | $5.5M | +17.6% | +20.4% | -15.5% |
| DYN | SELL · 10b5-1 | 2026-06-17 | 2026-06-22 | $20.10 | $1.7M | +12.0% | +12.6% | -16.9% |
| DYN | SELL · 10b5-1 | 2026-04-21 | 2026-04-23 | $20.01 | $219K | -10.2% | -6.9% | +19.1% |
| DYN | SELL · 10b5-1 | 2026-04-17 | 2026-04-21 | $20.21 | $6.8M | -9.7% | -9.9% | +21.8% |
| DYN | SELL · 10b5-1 | 2026-04-15 | 2026-04-17 | $20.35 | $2.0M | -13.4% | -17.8% | +12.9% |
| DYN | SELL | 2026-03-11 | 2026-03-13 | $19.52 | $2.5M | +3.3% | +3.4% | -2.3% |
| DYN | SELL | 2026-03-09 | 2026-03-11 | $19.09 | $13.1M | -9.3% | -5.2% | -9.1% |
| DYN | SELL | 2024-12-06 | 2024-12-10 | $29.30 | $8.0M | -17.2% | -45.2% | -60.3% |
| DYN | SELL | 2024-12-04 | 2024-12-06 | $29.38 | $8.2M | -16.2% | -16.1% | -58.2% |
| DYN | SELL | 2024-12-02 | 2024-12-04 | $29.50 | $6.5M | -10.2% | -14.8% | -59.1% |
| DYN | SELL · 10b5-1 | 2024-11-13 | 2024-11-15 | $34.14 | $1.3M | +10.1% | -7.7% | -50.3% |
| DYN | SELL · 10b5-1 | 2024-10-18 | 2024-10-22 | $35.16 | $948K | -13.3% | -10.3% | -56.1% |
| DYN | SELL · 10b5-1 | 2024-10-16 | 2024-10-18 | $35.29 | $2.6M | -16.1% | -15.7% | -57.6% |
| DYN | SELL · 10b5-1 | 2024-10-03 | 2024-10-07 | $35.13 | $382K | +8.1% | -7.2% | -23.5% |
| DYN | SELL · 10b5-1 | 2024-10-01 | 2024-10-03 | $35.32 | $2.1M | -1.2% | -15.4% | -25.1% |
| DYN | SELL · 10b5-1 | 2024-09-27 | 2024-10-01 | $35.50 | $2.2M | -3.1% | -16.9% | -31.9% |
| DYN | SELL · 10b5-1 | 2024-09-25 | 2024-09-27 | $35.11 | $210K | -4.9% | -8.6% | -27.3% |
| DYN | SELL · 10b5-1 | 2024-09-20 | 2024-09-24 | $35.88 | $5.8M | -3.4% | -7.8% | -29.1% |
| DYN | SELL · 10b5-1 | 2024-09-18 | 2024-09-20 | $36.15 | $5.8M | -3.0% | -8.6% | -33.7% |
| DYN | SELL · 10b5-1 | 2024-09-16 | 2024-09-18 | $35.11 | $276K | +2.5% | +0.5% | -25.4% |
| DYN | SELL · 10b5-1 | 2024-09-05 | 2024-09-09 | $35.03 | $110K | +12.1% | -1.4% | -11.7% |
| DYN | SELL · 10b5-1 | 2024-08-30 | 2024-09-04 | $45.59 | $2.9M | -0.9% | -6.1% | -18.8% |
| DYN | SELL · 10b5-1 | 2024-08-28 | 2024-08-30 | $45.03 | $12.1M | +19.1% | +29.3% | +10.2% |
| DYN | SELL · 10b5-1 | 2024-08-26 | 2024-08-28 | $44.87 | $13.9M | -27.6% | -24.5% | -34.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.