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 |
2021-06-01 Sale |
2021-06-02 7:34 pm |
Amphastar Pharmaceuticals Inc. | AMPH | Koo Richard Director |
25,827 | $19.28 | $498,009 | 263,270 (Indirect Direct) |
View |
2020-05-27 Sale |
2020-05-28 4:05 pm |
Amphastar Pharmaceuticals Inc. | AMPH | Koo Richard Director |
47,782 | $18.18 | $868,892 | 257,419 (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 |
2021-06-07 Option Award |
2021-06-08 8:55 pm |
N/A 2029-06-07 |
Amphastar Pharmaceuticals Inc. | AMPH | Koo Richard Director |
23,201 | $0 | 286,471 (Direct) |
View |
2021-06-01 Exercise |
2021-06-02 7:34 pm |
N/A 2021-06-09 |
Amphastar Pharmaceuticals Inc. | AMPH | Koo Richard Director |
25,827 | $0 | 263,270 (Direct) |
View |
2021-06-01 Exercise |
2021-06-02 7:34 pm |
N/A N/A |
Amphastar Pharmaceuticals Inc. | AMPH | Koo Richard Director |
25,827 | $16.43 | 263,270 (Direct) |
View |
2020-06-08 Option Award |
2020-06-09 8:21 pm |
N/A 2028-06-08 |
Amphastar Pharmaceuticals Inc. | AMPH | Koo Richard Director |
21,855 | $0 | 279,274 (Direct) |
View |
2020-05-27 Exercise |
2020-05-28 4:05 pm |
N/A 2020-05-27 |
Amphastar Pharmaceuticals Inc. | AMPH | Koo Richard Director |
47,782 | $0 | 257,419 (Direct) |
View |
2020-05-27 Exercise |
2020-05-28 4:05 pm |
N/A N/A |
Amphastar Pharmaceuticals Inc. | AMPH | Koo Richard Director |
47,782 | $15.11 | 257,419 (Direct) |
View |