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 |
2025-03-10 Sale |
2025-03-12 4:32 pm |
MADRIGAL PHARMACEUTICALS INC. | MDGL | Dier Mardi SVP and CFO |
258 | $323.04 | $83,344 | 10,440 (Direct) |
View |
2025-03-03 Sale |
2025-03-05 4:31 pm |
MADRIGAL PHARMACEUTICALS INC. | MDGL | Dier Mardi SVP and CFO |
1,961 | $324.96 | $637,248 | 6,914 (Direct) |
View |
2023-05-09 Purchase |
2023-05-11 8:51 pm |
ACELYRIN Inc. | SLRN | Dier Mardi CFO and CBO |
7,306 | $18 | $131,508 | 765,278 (Indirect Direct) |
View |
2022-10-14 Sale |
2022-10-17 6:49 pm |
Ultragenyx Pharmaceutical Inc. | RARE | Dier Mardi CFO & Executive Vice President |
1,629 | $40.16 | $65,421 | 66,695 (Direct) |
View |
2022-10-12 Sale |
2022-10-14 12:58 pm |
Ultragenyx Pharmaceutical Inc. | RARE | Dier Mardi CFO & Executive Vice President |
3,484 | $38.22 | $133,158 | 68,324 (Direct) |
View |
2022-03-01 Sale |
2022-03-03 6:12 pm |
Ultragenyx Pharmaceutical Inc. | RARE | Dier Mardi CFO & Executive Vice President |
954 | $65.71 | $62,686 | 76,708 (Direct) |
View |
2021-10-12 Sale |
2021-10-14 6:33 pm |
Ultragenyx Pharmaceutical Inc. | RARE | Dier Mardi CFO & Executive Vice President |
6,738 | $82 | $552,524 | 38,762 (Direct) |
View |
2020-09-29 Purchase |
2020-09-29 8:09 pm |
Prelude Therapeutics Inc | PRLD | Dier Mardi Director |
10,000 | $19 | $190,000 | 10,000 (Direct) |
View |
2020-07-02 Sale |
2020-07-02 4:25 pm |
PORTOLA PHARMACEUTICALS INC | PTLA | Dier Mardi EVP and CFO |
39,573 | $18 | $712,314 | 0 (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 |
2025-03-05 Option Award |
2025-03-07 5:43 pm |
N/A 2035-03-05 |
MADRIGAL PHARMACEUTICALS INC. | MDGL | Dier Mardi SVP and CFO |
10,158 | $0 | 17,072 (Direct) |
View |
2025-01-02 Option Award |
2025-01-06 4:43 pm |
N/A 2035-01-01 |
Oric Pharmaceuticals Inc. | ORIC | Dier Mardi Director |
35,000 | $0 | 35,000 (Direct) |
View |
2024-06-14 Option Award |
2024-06-18 4:13 pm |
N/A 2034-06-13 |
Prelude Therapeutics Inc | PRLD | Dier Mardi Director |
23,500 | $0 | 23,500 (Direct) |
View |
2024-06-12 Option Award |
2024-06-14 4:22 pm |
N/A 2034-06-11 |
Oric Pharmaceuticals Inc. | ORIC | Dier Mardi Director |
25,600 | $0 | 25,600 (Direct) |
View |
Ownership |
2024-03-21 4:30 pm |
N/A N/A |
MADRIGAL PHARMACEUTICALS INC. | MDGL | Dier Mardi SVP and CFO |
0 | $0 | 31,103 (Direct) |
View |
2023-06-16 Option Award |
2023-06-21 4:13 pm |
N/A 2033-06-15 |
Prelude Therapeutics Inc | PRLD | Dier Mardi Director |
23,500 | $0 | 23,500 (Direct) |
View |
2023-06-14 Option Award |
2023-06-15 4:52 pm |
N/A 2033-06-13 |
Oric Pharmaceuticals Inc. | ORIC | Dier Mardi Director |
20,500 | $0 | 20,500 (Direct) |
View |
2023-05-09 Other |
2023-05-11 8:51 pm |
N/A 2032-11-20 |
ACELYRIN Inc. | SLRN | Dier Mardi CFO and CBO |
1,517,694 | $0 | 765,278 (Direct) |
View |
2023-05-04 Option Award |
2023-05-04 7:59 pm |
N/A 2033-05-03 |
ACELYRIN Inc. | SLRN | Dier Mardi CFO and CBO |
85,226 | $0 | 85,226 (Direct) |
View |
Ownership |
2023-05-04 6:45 pm |
N/A 2032-11-20 |
ACELYRIN Inc. | SLRN | Dier Mardi CFO and CBO |
0 | $0 | 673,621 (Direct) |
View |
2022-09-16 Option Award |
2022-09-19 9:39 pm |
N/A N/A |
Ultragenyx Pharmaceutical Inc. | RARE | Dier Mardi CFO & Executive Vice President |
20,000 | $0 | 71,808 (Direct) |
View |
2022-06-17 Option Award |
2022-06-22 4:13 pm |
N/A 2032-06-16 |
Prelude Therapeutics Inc | PRLD | Dier Mardi Director |
34,300 | $0 | 34,300 (Direct) |
View |
2022-06-17 Option Award |
2022-06-17 8:19 pm |
N/A 2032-06-16 |
Oric Pharmaceuticals Inc. | ORIC | Dier Mardi Director |
53,700 | $0 | 53,700 (Direct) |
View |
2022-03-01 Option Award |
2022-03-03 6:12 pm |
N/A 2032-03-01 |
Ultragenyx Pharmaceutical Inc. | RARE | Dier Mardi CFO & Executive Vice President |
38,900 | $0 | 76,708 (Direct) |
View |
2021-06-18 Option Award |
2021-06-22 5:40 pm |
N/A 2031-06-17 |
Prelude Therapeutics Inc | PRLD | Dier Mardi Director |
23,344 | $0 | 23,344 (Direct) |
View |
2021-06-16 Option Award |
2021-06-17 7:42 pm |
N/A 2031-06-15 |
Oric Pharmaceuticals Inc. | ORIC | Dier Mardi Director |
16,625 | $0 | 16,625 (Direct) |
View |
2021-06-02 Option Award |
2021-06-04 4:13 pm |
2022-06-02 2031-06-01 |
Adamas Pharmaceuticals Inc | ADMS | Dier Mardi Director |
15,000 | $0 | 20,000 (Direct) |
View |
2021-03-01 Option Award |
2021-03-03 8:38 pm |
N/A 2031-03-01 |
Ultragenyx Pharmaceutical Inc. | RARE | Dier Mardi CFO & Executive Vice President |
16,500 | $0 | 56,500 (Direct) |
View |
2020-10-12 Option Award |
2020-10-13 5:52 pm |
N/A 2030-10-12 |
Ultragenyx Pharmaceutical Inc. | RARE | Dier Mardi CFO & Executive Vice President |
40,000 | $0 | 80,000 (Direct) |
View |
2020-09-24 Option Award |
2020-09-28 7:35 pm |
N/A 2030-09-23 |
Prelude Therapeutics Inc | PRLD | Dier Mardi Director |
3,458 | $0 | 3,458 (Direct) |
View |
Ownership |
2020-09-24 7:32 pm |
N/A 2030-09-01 |
Prelude Therapeutics Inc | PRLD | Dier Mardi Director |
0 | $0 | 43,230 (Direct) |
View |
2020-06-18 Option Award |
2020-07-02 4:25 pm |
N/A N/A |
PORTOLA PHARMACEUTICALS INC | PTLA | Dier Mardi EVP and CFO |
10 | $8.36 | 0 (Direct) |
View |
2020-06-03 Option Award |
2020-06-05 6:09 pm |
N/A 2030-06-02 |
Adamas Pharmaceuticals Inc | ADMS | Dier Mardi Director |
15,000 | $0 | 15,000 (Direct) |
View |