Geoff Mcdonough serves as Executive at Generation Bio Co., where they oversee executive responsibilities. Since joining the company, Geoff Mcdonough has executed 38 insider transactions totaling $1.1M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 15, 2026 involved exercising options for 395 shares valued at $0.
Geoff Mcdonough currently holds 1,582 shares of Generation Bio Co. (GBIO), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Geoff Mcdonough has been a net seller of GBIO stock. They have purchased $0 and sold $1.1M worth of shares.
Geoff Mcdonough's most recent insider trade was on Jan 15, 2026, when they sold 395 shares at $0.00 per share.
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| $5.64 |
| Discretionary |
| Jan 15, 2026 | GBIO | $0 | Option Exercise | 395 | $N/A | Discretionary |
| Oct 31, 2025 | GBIO | $1.6K | Payment | 293 | $5.51 | Discretionary |
| Oct 31, 2025 | GBIO | $0 | Option Exercise | 659 | $N/A | Discretionary |
| Oct 15, 2025 | GBIO | $1.0K | Payment | 155 | $6.71 | Discretionary |
| Oct 15, 2025 | GBIO | $0 | Option Exercise | 527 | $N/A | Discretionary |
| Jul 15, 2025 | GBIO | $666 | Payment | 1,548 | $0.43 | Discretionary |
| Jul 15, 2025 | GBIO | $0 | Option Exercise | 5,273 | $N/A | Discretionary |
| Jul 15, 2024 | GBIO | $0 | Option Exercise | 5,274 | $N/A | Discretionary |
| Jul 15, 2024 | GBIO | $4.5K | Payment | 1,548 | $2.93 | Discretionary |
| Apr 15, 2024 | GBIO | $0 | Option Exercise | 5,274 | $N/A | Discretionary |
| Apr 15, 2024 | GBIO | $5.7K | Payment | 1,548 | $3.70 | Discretionary |
| Jan 15, 2024 | GBIO | $15.5K | Payment | 8,121 | $1.91 | Discretionary |
| Jan 15, 2024 | GBIO | $0 | Option Exercise | 23,437 | $N/A | Discretionary |
| Jan 15, 2024 | GBIO | $0 | Option Exercise | 21,094 | $N/A | Discretionary |
| Jan 15, 2024 | GBIO | $14.0K | Payment | 7,310 | $1.91 | Discretionary |
| Oct 15, 2023 | GBIO | $0 | Option Exercise | 23,437 | $N/A | Discretionary |
| Oct 15, 2023 | GBIO | $33.7K | Payment | 10,395 | $3.24 | Discretionary |
| Jul 15, 2023 | GBIO | $38.0K | Payment | 7,476 | $5.08 | Discretionary |
| Jul 15, 2023 | GBIO | $0 | Option Exercise | 23,437 | $N/A | Discretionary |
| Apr 15, 2023 | GBIO | $0 | Option Exercise | 23,437 | $N/A | Discretionary |
| Apr 15, 2023 | GBIO | $31.0K | Payment | 6,879 | $4.50 | Discretionary |
| Jan 15, 2023 | GBIO | $0 | Option Exercise | 23,438 | $N/A | Discretionary |
| Jan 15, 2023 | GBIO | $41.4K | Payment | 8,122 | $5.10 | Discretionary |
| Oct 15, 2022 | GBIO | $58.3K | Payment | 10,395 | $5.61 | Discretionary |
| Oct 15, 2022 | GBIO | $0 | Option Exercise | 23,438 | $N/A | Discretionary |
| Jul 15, 2022 | GBIO | $101.6K | Payment | 14,150 | $7.18 | Discretionary |
| Jul 15, 2022 | GBIO | $0 | Option Exercise | 46,876 | $N/A | Discretionary |
| May 3, 2021 | GBIO | $286.5K | Sale | 8,076 | $35.47 | Discretionary |