Real time insider trading transaction history:
- Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>

Common stock purchase or sale:
Transaction Date |
Reported DateTime |
Company | Symbol | Insider Relationship |
Shares Traded |
Average Price |
Total Amount |
Shares Owned |
Filing |
2021-05-03 Sale |
2021-05-05 4:10 pm |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
10,000 | $35.63 | $356,335 | 1,675,542 (Indirect Direct) |
View |
2021-04-23 Sale |
2021-04-27 4:02 pm |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
10,000 | $35.1 | $351,000 | 1,685,542 (Indirect Direct) |
View |
2021-03-01 Sale |
2021-03-03 4:10 pm |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
10,000 | $37.58 | $375,801 | 1,695,542 (Indirect Direct) |
View |
Stock options: Exercise, Award, Grant, Conversion
Transaction Date |
Reported DateTime |
Exercisable Expiration |
Company | Symnbol | Insider Relationship |
Shares Traded |
Conversion Price |
Shares Owned |
Filing |
2025-04-15 Tax Withholding |
2025-04-17 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
1,548 | $0.3678 | 1,888,037 (Direct) |
View |
2025-04-15 Exercise |
2025-04-17 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
5,274 | $0 | 1,888,037 (Direct) |
View |
2025-01-15 Tax Withholding |
2025-01-17 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
1,828 | $0.888 | 1,889,585 (Direct) |
View |
2025-01-15 Exercise |
2025-01-17 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
5,274 | $0 | 1,889,585 (Direct) |
View |
2025-01-10 Option Award |
2025-01-14 4:05 pm |
N/A 2035-01-09 |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
901,690 | $0 | 2,745,644 (Direct) |
View |
2024-10-15 Tax Withholding |
2024-10-17 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
1,548 | $2.42 | 1,886,550 (Direct) |
View |
2024-10-15 Exercise |
2024-10-17 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
5,274 | $0 | 1,886,550 (Direct) |
View |
2024-07-15 Tax Withholding |
2024-07-17 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
1,548 | $2.93 | 1,888,098 (Direct) |
View |
2024-07-15 Exercise |
2024-07-17 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
5,274 | $0 | 1,888,098 (Direct) |
View |
2024-04-15 Tax Withholding |
2024-04-17 5:10 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
1,548 | $3.7 | 1,882,927 (Direct) |
View |
2024-04-15 Exercise |
2024-04-17 5:10 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
5,274 | $0 | 1,882,927 (Direct) |
View |
2024-03-27 Option Award |
2024-03-28 4:10 pm |
N/A 2034-03-26 |
Third Harmonic Bio Inc. | THRD | MCDONOUGH GEOFF Director |
60,000 | $0 | 60,000 (Direct) |
View |
2024-01-15 Exercise |
2024-01-17 5:00 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
44,531 | $0 | 1,884,475 (Direct) |
View |
2024-01-15 Tax Withholding |
2024-01-17 5:00 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
15,431 | $1.91 | 1,884,475 (Direct) |
View |
2024-01-02 Option Award |
2024-01-03 4:35 pm |
N/A 2034-01-01 |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
506,250 | $0 | 2,298,344 (Direct) |
View |
2023-12-01 Option Award |
2023-12-05 4:30 pm |
N/A 2033-11-30 |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
240,470 | $0 | 240,470 (Direct) |
View |
2023-10-15 Exercise |
2023-10-17 6:00 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
23,437 | $0 | 1,813,086 (Direct) |
View |
2023-10-15 Tax Withholding |
2023-10-17 6:00 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
10,395 | $3.24 | 1,813,086 (Direct) |
View |
2023-07-15 Exercise |
2023-07-18 4:35 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
23,437 | $0 | 1,823,481 (Direct) |
View |
2023-07-15 Tax Withholding |
2023-07-18 4:35 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
7,476 | $5.08 | 1,823,481 (Direct) |
View |
2023-04-15 Tax Withholding |
2023-04-18 4:16 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
6,879 | $4.5 | 1,827,841 (Direct) |
View |
2023-04-15 Exercise |
2023-04-18 4:16 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
23,437 | $0 | 1,827,841 (Direct) |
View |
2023-01-20 Option Award |
2023-01-24 4:19 pm |
N/A 2033-01-20 |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
253,125 | $0 | 253,125 (Direct) |
View |
2023-01-15 Tax Withholding |
2023-01-18 4:54 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
8,122 | $5.1 | 1,834,720 (Direct) |
View |
2023-01-15 Exercise |
2023-01-18 4:54 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
23,438 | $0 | 1,834,720 (Direct) |
View |
2022-10-15 Exercise |
2022-10-18 4:38 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
23,438 | $0 | 1,840,977 (Direct) |
View |
2022-10-15 Tax Withholding |
2022-10-18 4:38 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
10,395 | $5.61 | 1,840,977 (Direct) |
View |
2022-07-15 Tax Withholding |
2022-07-19 4:22 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
14,150 | $7.18 | 1,851,372 (Direct) |
View |
2022-07-15 Exercise |
2022-07-19 4:22 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
46,876 | $0 | 1,851,372 (Direct) |
View |
2022-01-21 Option Award |
2022-01-25 4:05 pm |
N/A 2032-01-21 |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
562,500 | $0 | 562,500 (Direct) |
View |
2021-06-08 Option Award |
2021-06-10 4:30 pm |
N/A 2031-06-08 |
Surface Oncology Inc. | SURF | MCDONOUGH GEOFF Director |
17,700 | $0 | 17,700 (Direct) |
View |
2021-01-22 Option Award |
2021-02-05 5:04 pm |
N/A 2031-01-21 |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
251,000 | $0 | 251,000 (Direct) |
View |
2021-01-13 Gift |
2021-01-15 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF PRESIDENT AND CEO |
275,000 | $0 | 1,705,542 (Direct) |
View |
Ownership(A) |
2021-01-13 4:05 pm |
N/A 2030-03-04 |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF President and CEO 10% Owner |
0 | $0 | 398,076 (Direct) |
View |
2020-06-16 Conversion |
2020-06-18 6:02 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF See Remarks 10% Owner |
313,231 | $0 | 1,705,542 (Direct) |
View |
2020-06-10 Option Award |
2020-06-12 08:00 am |
N/A 2030-06-10 |
Surface Oncology Inc. | SURF | MCDONOUGH GEOFF Director |
12,000 | $0 | 12,000 (Direct) |
View |
Ownership |
2020-06-11 8:42 pm |
N/A N/A |
Generation Bio Co. | GBIO | MCDONOUGH GEOFF See Remarks 10% Owner |
0 | $0 | 2,103,618 (Direct) |
View |