GBIO insider transaction filings
Generation Bio Co. — 46 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-02-09. Screen GBIO transaction legs live →
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-02-09 | 4 | Nicholson Donald William — Director | Code (U): 21,357 · Disposition to issuer (D): 3,000 (derivative) · Disposition to issuer (D): 5,200 (derivative) · Disposition to issuer (D): 1,500 (derivative) · Disposition to issuer (D): 1,920 (derivative) · Disposition to issuer (D): 2,500 (derivative) · +1 more | EDGAR |
| 2026-02-09 | 4 | Howze Yalonda — INTERIM CEO AND PRESIDENT | Code (U): 3,759 · Disposition to issuer (D): 10,710 (derivative) · Disposition to issuer (D): 11,883 (derivative) · Disposition to issuer (D): 25,102 (derivative) · Disposition to issuer (D): 7,630 (derivative) | EDGAR |
| 2026-02-09 | 4 | Conway Kevin John — CHIEF FINANCIAL OFFICER | Code (U): 2,072 · Disposition to issuer (D): 1,192 (derivative) · Disposition to issuer (D): 283 (derivative) · Disposition to issuer (D): 1,061 (derivative) · Disposition to issuer (D): 621 (derivative) · Disposition to issuer (D): 1,399 (derivative) · +9 more | EDGAR |
| 2026-02-09 | 4 | Appelhans Dannielle — Director | Code (U): 1,263 · Code (U): 736 · Disposition to issuer (D): 3,000 (derivative) · Disposition to issuer (D): 3,840 (derivative) · Disposition to issuer (D): 2,500 (derivative) · Disposition to issuer (D): 6,000 (derivative) | EDGAR |
| 2026-02-09 | 4 | MCDONOUGH GEOFF — Director | Code (U): 138,492 · Code (U): 22,646 · Code (U): 27,500 · Disposition to issuer (D): 19,903 (derivative) · Disposition to issuer (D): 25,099 (derivative) · Disposition to issuer (D): 37,499 (derivative) · +4 more | EDGAR |
| 2026-02-09 | 4 | Stehman-Breen Catherine — Director | Code (U): 4,752 · Disposition to issuer (D): 3,000 (derivative) · Disposition to issuer (D): 5,200 (derivative) · Disposition to issuer (D): 1,500 (derivative) · Disposition to issuer (D): 1,920 (derivative) · Disposition to issuer (D): 2,500 (derivative) · +1 more | EDGAR |
| 2026-02-09 | 4 | Cooper Ronald Harold Wilfred — Director | Code (U): 950 · Disposition to issuer (D): 3,000 (derivative) · Disposition to issuer (D): 3,000 (derivative) · Disposition to issuer (D): 1,920 (derivative) · Disposition to issuer (D): 2,500 (derivative) · Disposition to issuer (D): 6,000 (derivative) | EDGAR |
| 2026-02-09 | 4 | Atlas Venture Fund X, L.P. — 10% owner ATLAS VENTURE ASSOCIATES X, L.P. — 10% owner Atlas Venture Associates X, LLC — 10% owner Atlas Venture Opportunity Fund I, L.P. — 10% owner Atlas Venture Associates Opportunity I, L.P. — 10% owner Atlas Venture Associates Opportunity I, LLC — 10% owner | Code (U): 711,193 · Code (U): 116,693 · Code (U): 60 | EDGAR |
| 2026-02-09 | 4 | Rhodes Jason P — Director | Code (U): 711,193 · Code (U): 116,693 · Code (U): 60 · Disposition to issuer (D): 3,000 (derivative) · Disposition to issuer (D): 5,200 (derivative) · Disposition to issuer (D): 1,500 (derivative) · +3 more | EDGAR |
| 2026-02-09 | 4 | Quinn Anthony G. — Director | Code (U): 29,928 · Code (U): 7,283 · Disposition to issuer (D): 3,000 (derivative) · Disposition to issuer (D): 5,200 (derivative) · Disposition to issuer (D): 1,500 (derivative) · Disposition to issuer (D): 1,920 (derivative) · +2 more | EDGAR |
| 2026-02-09 | 4 | Christensen Gustav — Director | Code (U): 13,142 · Disposition to issuer (D): 3,000 (derivative) · Disposition to issuer (D): 5,200 (derivative) · Disposition to issuer (D): 1,500 (derivative) · Disposition to issuer (D): 1,920 (derivative) · Disposition to issuer (D): 2,500 (derivative) · +1 more | EDGAR |
| 2026-02-09 | 4 | Rowland Charles A Jr — Director | Code (U): 53,475 · Disposition to issuer (D): 3,000 (derivative) · Disposition to issuer (D): 4,246 (derivative) · Disposition to issuer (D): 5,200 (derivative) · Disposition to issuer (D): 1,500 (derivative) · Disposition to issuer (D): 1,920 (derivative) · +2 more | EDGAR |
| 2026-02-09 | 4 | JONAS JEFFREY M — Director | Disposition to issuer (D): 3,000 (derivative) · Disposition to issuer (D): 4,246 (derivative) · Disposition to issuer (D): 5,200 (derivative) · Disposition to issuer (D): 1,500 (derivative) · Disposition to issuer (D): 1,920 (derivative) · Disposition to issuer (D): 2,500 (derivative) · +1 more | EDGAR |
| 2026-02-04 | 4 | Conway Kevin John — Chief Financial Officer | Option exercise (M): 235 · Tax withholding (F): 72 @ $5.64 · Option exercise (M): 235 (derivative) @ $0 | EDGAR |
| 2026-02-04 | 4 | Howze Yalonda — INTERIM CEO & PRESIDENT | Option exercise (M): 1,673 · Tax withholding (F): 495 @ $5.64 · Option exercise (M): 1,673 (derivative) @ $0 | EDGAR |
| 2026-02-04 | 4 | MCDONOUGH GEOFF — Director | Option exercise (M): 1,582 · Tax withholding (F): 550 @ $5.64 · Option exercise (M): 1,582 (derivative) @ $0 | EDGAR |
| 2026-01-16 | 4 | Conway Kevin John — Chief Financial Officer | Option exercise (M): 59 · Tax withholding (F): 17 @ $5.64 · Option exercise (M): 59 (derivative) @ $0 | EDGAR |
| 2026-01-16 | 4 | Howze Yalonda — CHIEF LEGAL OFFICER | Option exercise (M): 335 · Tax withholding (F): 99 @ $5.64 · Option exercise (M): 335 (derivative) @ $0 | EDGAR |
| 2026-01-16 | 4 | MCDONOUGH GEOFF — Director | Option exercise (M): 395 · Tax withholding (F): 137 @ $5.64 · Option exercise (M): 395 (derivative) @ $0 | EDGAR |
| 2025-11-21 | 4 | MCDONOUGH GEOFF — Director | Option exercise (M): 659 · Tax withholding (F): 293 @ $5.51 · Option exercise (M): 659 (derivative) @ $0 | EDGAR |
| 2025-10-31 | 4 | Samayoa Phillip — CHIEF SCIENTIFIC OFFICER | Holdings only — no transactions reported | EDGAR |
| 2025-10-31 | 4 | Paone Antoinette — CHIEF OPERATING OFFICER | Holdings only — no transactions reported | EDGAR |
| 2025-10-17 | 4 | Conway Kevin John — Chief Financial Officer | Option exercise (M): 58 · Tax withholding (F): 18 @ $6.71 · Option exercise (M): 58 (derivative) @ $0 | EDGAR |
| 2025-10-17 | 4 | Samayoa Phillip — CHIEF SCIENTIFIC OFFICER | Option exercise (M): 114 · Tax withholding (F): 34 @ $6.71 · Option exercise (M): 114 (derivative) @ $0 | EDGAR |
| 2025-10-17 | 4 | Paone Antoinette — CHIEF OPERATING OFFICER | Option exercise (M): 159 · Tax withholding (F): 47 @ $6.71 · Option exercise (M): 159 (derivative) @ $0 | EDGAR |
| 2025-10-17 | 4 | Howze Yalonda — CHIEF LEGAL OFFICER | Option exercise (M): 334 · Tax withholding (F): 99 @ $6.71 · Option exercise (M): 334 (derivative) @ $0 | EDGAR |
| 2025-10-17 | 4 | MCDONOUGH GEOFF — PRESIDENT AND CEO, Director | Option exercise (M): 527 · Tax withholding (F): 155 @ $6.71 · Option exercise (M): 527 (derivative) @ $0 | EDGAR |
| 2025-07-17 | 4 | Howze Yalonda — CHIEF LEGAL OFFICER | Option exercise (M): 3,347 · Tax withholding (F): 983 @ $0.43 · Option exercise (M): 3,347 (derivative) @ $0 | EDGAR |
| 2025-07-17 | 4 | Conway Kevin John — Chief Financial Officer | Option exercise (M): 587 · Tax withholding (F): 173 @ $0.43 · Option exercise (M): 587 (derivative) @ $0 | EDGAR |
| 2025-07-17 | 4 | Paone Antoinette — CHIEF OPERATING OFFICER | Option exercise (M): 1,592 · Tax withholding (F): 468 @ $0.43 · Option exercise (M): 1,592 (derivative) @ $0 | EDGAR |
| 2025-07-17 | 4 | Samayoa Phillip — CHIEF SCIENTIFIC OFFICER | Option exercise (M): 1,147 · Tax withholding (F): 337 @ $0.43 · Option exercise (M): 1,147 (derivative) @ $0 | EDGAR |
| 2025-07-17 | 4 | MCDONOUGH GEOFF — PRESIDENT AND CEO, Director | Option exercise (M): 5,273 · Tax withholding (F): 1,548 @ $0.43 · Option exercise (M): 5,273 (derivative) @ $0 | EDGAR |
| 2025-06-06 | 4 | Nicholson Donald William — Director | Grant/award (A): 30,000 (derivative) @ $0 | EDGAR |
| 2025-06-06 | 4 | Appelhans Dannielle — Director | Grant/award (A): 30,000 (derivative) @ $0 | EDGAR |
| 2025-06-06 | 4 | Stehman-Breen Catherine — Director | Grant/award (A): 30,000 (derivative) @ $0 | EDGAR |
| 2025-06-06 | 4 | Cooper Ronald Harold Wilfred — Director | Grant/award (A): 30,000 (derivative) @ $0 | EDGAR |
| 2025-06-06 | 4 | Rhodes Jason P — Director | Grant/award (A): 30,000 (derivative) @ $0 | EDGAR |
| 2025-06-06 | 4 | Quinn Anthony G. — Director | Grant/award (A): 30,000 (derivative) @ $0 | EDGAR |
| 2025-06-06 | 4 | Christensen Gustav — Director | Grant/award (A): 30,000 (derivative) @ $0 | EDGAR |
| 2025-06-06 | 4 | Rowland Charles A Jr — Director | Grant/award (A): 30,000 (derivative) @ $0 | EDGAR |
| 2025-06-06 | 4 | JONAS JEFFREY M — Director | Grant/award (A): 30,000 (derivative) @ $0 | EDGAR |
| 2025-04-17 | 4 | Samayoa Phillip — CHIEF SCIENTIFIC OFFICER | Option exercise (M): 1,147 · Tax withholding (F): 337 @ $0.37 · Option exercise (M): 1,147 (derivative) @ $0 | EDGAR |
| 2025-04-17 | 4 | MCDONOUGH GEOFF — PRESIDENT AND CEO, Director | Option exercise (M): 5,274 · Tax withholding (F): 1,548 @ $0.37 · Option exercise (M): 5,274 (derivative) @ $0 | EDGAR |
| 2025-04-17 | 4 | Paone Antoinette — CHIEF OPERATING OFFICER | Option exercise (M): 1,592 · Tax withholding (F): 468 @ $0.37 · Option exercise (M): 1,592 (derivative) @ $0 | EDGAR |
| 2025-04-17 | 4 | Howze Yalonda — CHIEF LEGAL OFFICER | Option exercise (M): 3,347 · Tax withholding (F): 983 @ $0.37 · Option exercise (M): 3,347 (derivative) @ $0 | EDGAR |
| 2025-04-17 | 4 | Conway Kevin John — Chief Financial Officer | Option exercise (M): 587 · Tax withholding (F): 173 @ $0.37 · Option exercise (M): 587 (derivative) @ $0 | EDGAR |
Recent 8-K events — Generation Bio Co.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-02-09 | 8-K | 1.01 — Entry into a Material Definitive Agreement 1.02 — Termination of a Material Definitive Agreement 2.01 — Completion of Acquisition or Disposition of Assets 3.01 — Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing 3.03 — Material Modification to Rights of Security Holders 5.01 — Changes in Control of Registrant 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 5.03 — Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-12-15 | 8-K | 1.01 — Entry into a Material Definitive Agreement 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-11-05 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-10-22 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-08-12 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-07-18 | 8-K | 3.03 — Material Modification to Rights of Security Holders 5.03 — Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-06-05 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2025-05-07 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-03-13 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-02-28 | 8-K | 3.01 — Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing | EDGAR |
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