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 |
2025-03-05 Sale |
2025-03-07 4:08 pm |
Dyne Therapeutics Inc. | DYN | Kerr Douglas Chief Medical Officer |
1,343 | $11.83 | $15,888 | 94,157 (Direct) |
View |
2021-07-08 Sale |
2021-07-12 4:02 pm |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
3,518 | $25.2 | $88,670 | 365,257 (Direct) |
View |
2021-04-05 Sale |
2021-04-07 4:05 pm |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
14,072 | $30.09 | $423,451 | 368,775 (Direct) |
View |
2021-03-05 Sale |
2021-03-09 4:05 pm |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
11,267 | $31.44 | $354,267 | 416,517 (Direct) |
View |
2021-02-08 Sale |
2021-02-10 4:05 pm |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
11,267 | $33.37 | $375,954 | 427,784 (Direct) |
View |
2021-01-11 Sale |
2021-01-13 4:07 pm |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
11,267 | $27.58 | $310,768 | 439,051 (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 |
2024-12-04 Option Award |
2024-12-06 4:05 pm |
N/A 2034-12-03 |
Dyne Therapeutics Inc. | DYN | Kerr Douglas Chief Medical Officer |
124,600 | $0 | 172,100 (Direct) |
View |
2024-09-03 Option Award |
2024-09-03 6:22 pm |
N/A 2034-09-02 |
Dyne Therapeutics Inc. | DYN | Kerr Douglas Chief Medical Officer |
197,800 | $0 | 197,800 (Direct) |
View |
2024-01-29 Exercise |
2024-01-31 4:30 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
5,021 | $0 | 385,628 (Direct) |
View |
2024-01-29 Tax Withholding |
2024-01-31 4:30 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
1,476 | $1.9 | 385,628 (Direct) |
View |
2024-01-15 Exercise |
2024-01-17 5:00 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
14,131 | $0 | 409,601 (Direct) |
View |
2024-01-15 Tax Withholding |
2024-01-17 5:00 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
4,897 | $1.91 | 409,601 (Direct) |
View |
2023-10-15 Exercise |
2023-10-17 6:00 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
7,437 | $0 | 377,841 (Direct) |
View |
2023-10-15 Tax Withholding |
2023-10-17 6:00 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
2,183 | $3.24 | 377,841 (Direct) |
View |
2023-07-15 Exercise |
2023-07-18 4:35 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
7,437 | $0 | 380,024 (Direct) |
View |
2023-07-15 Tax Withholding |
2023-07-18 4:35 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
2,183 | $5.08 | 380,024 (Direct) |
View |
2023-04-15 Exercise |
2023-04-18 4:14 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
7,437 | $0 | 379,091 (Direct) |
View |
2023-04-15 Tax Withholding |
2023-04-18 4:14 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
2,183 | $4.5 | 379,091 (Direct) |
View |
2023-01-20 Option Award |
2023-01-24 4:20 pm |
N/A 2033-01-20 |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
80,325 | $0 | 80,325 (Direct) |
View |
2023-01-15 Exercise |
2023-01-18 4:52 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
7,438 | $0 | 381,274 (Direct) |
View |
2023-01-15 Tax Withholding |
2023-01-18 4:52 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
2,578 | $5.1 | 381,274 (Direct) |
View |
2022-10-15 Exercise |
2022-10-18 4:41 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
7,438 | $0 | 381,987 (Direct) |
View |
2022-10-15 Tax Withholding |
2022-10-18 4:41 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
2,184 | $5.61 | 381,987 (Direct) |
View |
2022-07-15 Exercise |
2022-07-19 4:19 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
14,876 | $0 | 384,171 (Direct) |
View |
2022-07-15 Tax Withholding |
2022-07-19 4:19 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
4,367 | $7.18 | 384,171 (Direct) |
View |
2022-01-21 Option Award |
2022-01-25 4:05 pm |
N/A 2032-01-21 |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
178,500 | $0 | 178,500 (Direct) |
View |
2021-07-08 Exercise |
2021-07-12 4:02 pm |
N/A 2030-03-04 |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
3,518 | $0 | 365,257 (Direct) |
View |
2021-07-08 Exercise |
2021-07-12 4:02 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
3,518 | $5.16 | 365,257 (Direct) |
View |
2021-04-05 Exercise |
2021-04-07 4:05 pm |
N/A 2030-03-04 |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
14,072 | $0 | 368,775 (Direct) |
View |
2021-04-05 Exercise |
2021-04-07 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
14,072 | $5.16 | 368,775 (Direct) |
View |
2021-03-05 Exercise |
2021-03-09 4:05 pm |
N/A 2028-04-01 |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
11,267 | $0 | 416,517 (Direct) |
View |
2021-03-05 Exercise |
2021-03-09 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
11,267 | $4.59 | 416,517 (Direct) |
View |
2021-02-08 Exercise |
2021-02-10 4:05 pm |
N/A 2028-04-01 |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
11,267 | $0 | 427,784 (Direct) |
View |
2021-02-08 Exercise |
2021-02-10 4:05 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
11,267 | $4.59 | 427,784 (Direct) |
View |
2021-01-22 Option Award |
2021-02-05 5:05 pm |
N/A 2031-01-21 |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
73,500 | $0 | 73,500 (Direct) |
View |
2021-01-11 Exercise |
2021-01-13 4:07 pm |
N/A 2028-04-01 |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
11,267 | $0 | 439,051 (Direct) |
View |
2021-01-11 Exercise |
2021-01-13 4:07 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas CHIEF MEDICAL OFFICER |
11,267 | $4.59 | 439,051 (Direct) |
View |
Ownership |
2020-06-11 8:38 pm |
N/A N/A |
Generation Bio Co. | GBIO | Kerr Douglas Chief Development Officer |
0 | $0 | 562,896 (Direct) |
View |