Quinn Anthony G. 4

What Happened
Anthony G. Quinn, a director, disposed of a total of 57,331 Generation Bio (GBIO) shares on February 9, 2026 in connection with a change-of-control transaction (tender offer and merger). Each tendered share was exchanged for $4.2913 in cash (total cash ≈ $246,025) plus one non-tradeable contingent value right (CVR) per share; the CVRs have an estimated maximum contingent consideration of $25.01 per CVR. Several reported dispositions labeled as "to the issuer" reflect the merger treatment of outstanding options (see details below).

Key Details

• Transaction date: February 9, 2026 (Effective Time of Merger). Filing date: February 9, 2026.
• Cash price per share: $4.2913; total shares disposed: 57,331; estimated cash received ≈ $246,025.
• Additional consideration: one non-tradeable CVR per share; estimated maximum contingent consideration of $25.01 per CVR (contingent, not guaranteed).
• Some dispositions were derivative-related (options): in‑the‑money options were cashed out under the merger formula (Cash Amount minus option exercise price times underlying shares); options with exercise price ≥ Cash Amount were cancelled for no consideration.
• Securities were held directly by the Quinn Family Irrevocable Trust of 2021 (Quinn Family Trust). The Form 4 notes the trust as the direct holder. The report does not specify post-transaction share balance.
• This was a merger/tender-offer disposition (not an open-market sale); filing appears timely (same-day).

Context
These sales were part of a contractual change-of-control process (tender offer and subsequent merger), not routine open‑market selling—shares were exchanged per the Merger Agreement and certain options were automatically cashed out or cancelled. CVRs are contingent rights and are non-tradeable; any additional payment depends on future events per the CVR agreement.