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 |
2024-09-27 Purchase |
2024-09-30 7:10 pm |
Viridian Therapeutics Inc. | VRDN | Mahoney Stephen F. President and CEO |
21,400 | $23.33 | $499,262 | 21,400 (Direct) |
View |
2021-09-16 Sale |
2021-09-20 5:02 pm |
Magenta Therapeutics Inc. | MGTA | Mahoney Stephen F. See Remarks |
5,736 | $6.73 | $38,603 | 14,264 (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 |
2025-03-03 Option Award |
2025-03-04 9:14 pm |
N/A 2035-03-03 |
Viridian Therapeutics Inc. | VRDN | Mahoney Stephen F. President and CEO |
513,993 | $0 | 513,993 (Direct) |
View |
2023-10-30 Option Award |
2023-11-01 4:35 pm |
N/A 2033-10-30 |
Viridian Therapeutics Inc. | VRDN | Mahoney Stephen F. President and CEO |
1,259,400 | $0 | 1,259,400 (Direct) |
View |
2022-11-30 Option Award |
2022-12-02 4:23 pm |
N/A N/A |
Magenta Therapeutics Inc. | MGTA | Mahoney Stephen F. See Remarks |
3,000 | $0.94 | 17,264 (Direct) |
View |
2022-08-01 Option Award |
2022-08-01 9:11 pm |
N/A 2032-07-31 |
Magenta Therapeutics Inc. | MGTA | Mahoney Stephen F. See Remarks |
130,000 | $0 | 130,000 (Direct) |
View |
2022-05-17 Option Award |
2022-05-19 4:19 pm |
N/A 2032-05-16 |
Magenta Therapeutics Inc. | MGTA | Mahoney Stephen F. See Remarks |
62,500 | $0 | 62,500 (Direct) |
View |
2022-02-15 Option Award |
2022-02-17 5:16 pm |
N/A 2032-02-14 |
Magenta Therapeutics Inc. | MGTA | Mahoney Stephen F. See Remarks |
130,000 | $0 | 130,000 (Direct) |
View |
2021-09-14 Option Award |
2021-09-16 7:41 pm |
N/A N/A |
Magenta Therapeutics Inc. | MGTA | Mahoney Stephen F. See Remarks |
20,000 | $0 | 20,000 (Direct) |
View |
2020-11-02 Option Award |
2020-11-04 4:39 pm |
N/A 2030-11-01 |
Magenta Therapeutics Inc. | MGTA | Mahoney Stephen F. See Remarks |
435,000 | $0 | 435,000 (Direct) |
View |