Douglas Kerr, CHIEF MEDICAL OFFICER at Generation Bio Co. (GBIO), sold 18,259 shares at $31.87 ($571K) on 2021-03-05, disclosed to the SEC on 2021-03-09.
Open-market sale of $571k GBIO by CHIEF MEDICAL OFFICER. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Nothing distinguishes this filing.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $29.68 | 2,677 | $79K | 13.9% |
| 2 | $29.68 | 2,677 | $79K | 13.9% |
| 3 | $30.92 | 2,500 | $77K | 13.5% |
| 4 | $31.87 | 4,315 | $138K | 24.1% |
| 5 | $31.87 | 4,315 | $138K | 24.1% |
| 6 | $32.97 | 775 |
| $26K |
| 4.5% |
| 7 | $33.75 | 400 | $14K | 2.4% |
| 8 | $34.77 | 500 | $17K | 3.0% |
| 9 | $35.58 | 100 | $4K | 0.6% |
| Total | $31.29 avg | 18,259 | $571K | 100% |
| Filing → |
| DYN | SELL | 2026-06-17 | $16K | — | Filing → |
| DYN | SELL | 2026-05-14 | $29K | — | Filing → |
| DYN | SELL | 2026-03-06 | $13K | — | Filing → |