Kerr Douglas — SEC Form 4 filings
SEC reporting owner CIK 1814189. 15 Form 4 filings on record with FilingPulse; latest filed 2026-09-08.
Transaction summary — filings shown
Covers all 15 filings on record, filed 2024-01-17 to 2026-09-08. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 11 legs across 9 filings — 17,936 shares, $325,760 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 16.
- Largest priced transaction: sale of 3,745 shares @ $24.35 ($91,191) in Dyne Therapeutics, Inc., filed 2026-09-08.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Dyne Therapeutics, Inc. (DYN) | Chief Medical Officer | 13 | — | 11 legs · 17,936 sh · $325,760 | 7 |
| Generation Bio Co. (GBIO) | CHIEF MEDICAL OFFICER | 2 | — | — | 9 |
Form 4 filings — Kerr Douglas
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-08 | 4 | Dyne Therapeutics, Inc. (DYN) | Sale (S): 3,745 @ $24.35 · Sale (S): 1,290 @ $18.88 | EDGAR |
| 2026-08-17 | 4 | Dyne Therapeutics, Inc. (DYN) | Sale (S): 1,556 @ $26.28 | EDGAR |
| 2026-06-17 | 4 | Dyne Therapeutics, Inc. (DYN) | Sale (S): 887 @ $18.33 | EDGAR |
| 2026-05-14 | 4 | Dyne Therapeutics, Inc. (DYN) | Sale (S): 1,564 @ $18.36 | EDGAR |
| 2026-03-06 | 4 | Dyne Therapeutics, Inc. (DYN) | Sale (S): 904 @ $14.90 | EDGAR |
| 2026-02-17 | 4 | Dyne Therapeutics, Inc. (DYN) | Grant/award (A): 85,000 @ $0 · Grant/award (A): 130,000 (derivative) @ $0 | EDGAR |
| 2025-12-05 | 4 | Dyne Therapeutics, Inc. (DYN) | Sale (S): 880 @ $20.72 | EDGAR |
| 2025-09-08 | 4 | Dyne Therapeutics, Inc. (DYN) | Sale (S): 3,552 @ $13.27 · Sale (S): 873 @ $13.41 | EDGAR |
| 2025-07-18 | 4 | Dyne Therapeutics, Inc. (DYN) | Grant/award (A): 65,110 (derivative) @ $0 | EDGAR |
| 2025-06-06 | 4 | Dyne Therapeutics, Inc. (DYN) | Sale (S): 1,342 @ $13.35 | EDGAR |
| 2025-03-07 | 4 | Dyne Therapeutics, Inc. (DYN) | Sale (S): 1,343 @ $11.83 | EDGAR |
| 2024-12-06 | 4 | Dyne Therapeutics, Inc. (DYN) | Grant/award (A): 48,000 @ $0 · Grant/award (A): 76,600 (derivative) @ $0 | EDGAR |
| 2024-09-03 | 4 | Dyne Therapeutics, Inc. (DYN) | Grant/award (A): 47,500 @ $0 · Grant/award (A): 150,300 (derivative) @ $0 | EDGAR |
| 2024-01-31 | 4 | Generation Bio Co. (GBIO) | Option exercise (M): 5,021 · Tax withholding (F): 1,476 @ $1.90 · Option exercise (M): 5,021 (derivative) @ $0 | EDGAR |
| 2024-01-17 | 4 | Generation Bio Co. (GBIO) | Option exercise (M): 7,437 · Tax withholding (F): 2,577 @ $1.91 · Option exercise (M): 6,694 · Tax withholding (F): 2,320 @ $1.91 · Option exercise (M): 7,437 (derivative) @ $0 · Option exercise (M): 6,694 (derivative) @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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