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 |
| 2024-01-10 Sale | 2024-01-11 4:37 pm | Amphastar Pharmaceuticals Inc. | AMPH | Luo Mary Z. Zhang Jack Y. COO,Chief Scientist & Chairman 10% Owner | 131,386 | $54.59 | $7,171,768 | 10,015,813 (Indirect Direct) | View |
| 2024-01-08 Sale | 2024-01-10 6:27 pm | Amphastar Pharmaceuticals Inc. | AMPH | Luo Mary Z. Zhang Jack Y. COO,Chief Scientist & Chairman 10% Owner | 219,800 | $58.23 | $12,798,708 | 10,147,199 (Indirect Direct) | View |
| 2022-05-20 Sale | 2022-05-23 4:05 pm | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 10,650 | $34.21 | $364,365 | 10,435,341 (Indirect Direct) | View |
| 2022-05-18 Sale | 2022-05-20 4:38 pm | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 108,776 | $34 | $3,697,861 | 10,445,991 (Indirect Direct) | View |
| 2022-05-16 Sale | 2022-05-18 4:06 pm | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 118,445 | $35.75 | $4,234,897 | 10,554,767 (Indirect Direct) | View |
| 2021-02-16 Sale | 2021-02-18 6:58 pm | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. Applied Physics & Chemistry Laboratories Inc. CEO & Chief Scientific Officer 10% Owner | 30,467 | $18.59 | $566,315 | 10,529,628 (Indirect Direct) | View |
| 2021-02-10 Sale | 2021-02-12 7:11 pm | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. Applied Physics & Chemistry Laboratories Inc. CEO & Chief Scientific Officer 10% Owner | 48,847 | $18.93 | $924,750 | 10,560,095 (Indirect Direct) | View |
| 2021-02-05 Sale | 2021-02-09 5:30 pm | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. Applied Physics & Chemistry Laboratories Inc. CEO & Chief Scientific Officer 10% Owner | 40,886 | $18.92 | $773,546 | 10,608,942 (Indirect Direct) | View |
| 2021-02-03 Sale | 2021-02-05 8:35 pm | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. Applied Physics & Chemistry Laboratories Inc. CEO & Chief Scientific Officer 10% Owner | 41,869 | $18.69 | $782,343 | 10,649,828 (Indirect Direct) | View |
| 2021-02-01 Sale | 2021-02-03 4:15 pm | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. Applied Physics & Chemistry Laboratories Inc. CEO & Chief Scientific Officer 10% Owner | 37,931 | $18.43 | $698,941 | 10,691,697 (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 |
| 2025-03-14 Exercise | 2025-03-18 7:13 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 501,690 | $14.69 | 10,660,813 (Direct) | View |
| 2025-03-14 Tax Withholding | 2025-03-18 7:13 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 402,822 | $26.66 | 10,660,813 (Direct) | View |
| 2025-03-17 Tax Withholding | 2025-03-18 7:13 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 23,373 | $27.69 | 10,660,813 (Direct) | View |
| 2025-03-14 Exercise | 2025-03-18 7:13 pm | N/A 2025-03-16 | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 501,690 | $0 | 10,660,813 (Direct) | View |
| 2025-03-10 Option Award | 2025-03-12 4:03 pm | N/A 2035-03-10 | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 516,095 | $0 | 10,936,191 (Direct) | View |
| 2025-03-06 Tax Withholding | 2025-03-10 4:04 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 12,714 | $28.32 | 10,420,096 (Direct) | View |
| 2025-03-04 Tax Withholding | 2025-03-06 4:16 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 8,179 | $27.62 | 10,432,810 (Direct) | View |
| 2024-11-11 Gift | 2024-11-12 8:05 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 125,000 | $0 | 10,440,989 (Direct) | View |
| 2024-09-13 Exercise | 2024-09-16 7:09 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 100,000 | $14.69 | 10,981,466 (Direct) | View |
| 2024-09-13 Exercise | 2024-09-16 7:09 pm | N/A 2025-03-16 | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 100,000 | $0 | 10,981,466 (Direct) | View |
| 2024-06-10 Exercise | 2024-06-11 6:35 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 100,000 | $14.69 | 10,981,466 (Direct) | View |
| 2024-06-10 Exercise | 2024-06-11 6:35 pm | N/A 2025-03-16 | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 100,000 | $0 | 10,981,466 (Direct) | View |
| 2024-03-15 Tax Withholding | 2024-03-19 6:55 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 634,199 | $43.05 | 10,490,989 (Direct) | View |
| 2024-03-15 Exercise | 2024-03-19 6:55 pm | N/A 2024-03-17 | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 1,032,976 | $0 | 10,490,989 (Direct) | View |
| 2024-03-15 Exercise | 2024-03-19 6:55 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 1,032,976 | $12.46 | 10,490,989 (Direct) | View |
| 2024-03-06 Tax Withholding | 2024-03-08 4:32 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 10,021 | $46.31 | 10,092,212 (Direct) | View |
| 2024-03-04 Option Award | 2024-03-06 6:29 pm | N/A 2034-03-04 | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & CHIEF SCIENTIFIC OFFICER 10% Owner | 284,002 | $0 | 10,294,815 (Direct) | View |
| 2023-03-17 Tax Withholding | 2023-03-20 8:02 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 22,820 | $36.29 | 10,366,999 (Direct) | View |
| 2023-03-16 Gift | 2023-03-20 8:02 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 57,365 | $0 | 10,366,999 (Indirect) | View |
| 2023-03-16 Tax Withholding | 2023-03-20 8:02 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 35,239 | $37.6 | 10,366,999 (Direct) | View |
| 2023-03-15 Tax Withholding | 2023-03-17 7:01 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 11,237 | $36.84 | 10,539,788 (Direct) | View |
| 2023-03-06 Option Award | 2023-03-08 4:05 pm | N/A 2033-03-06 | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 359,450 | $0 | 10,794,791 (Direct) | View |
| 2022-03-16 Tax Withholding | 2022-03-18 6:54 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 35,667 | $34.22 | 10,673,212 (Direct) | View |
| 2022-03-17 Tax Withholding | 2022-03-18 6:54 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 22,820 | $34.18 | 10,673,212 (Direct) | View |
| 2022-03-15 Option Award | 2022-03-17 5:05 pm | N/A 2032-03-15 | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 361,571 | $0 | 10,983,944 (Direct) | View |
| 2022-03-15 Tax Withholding | 2022-03-17 5:05 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 19,545 | $34.74 | 10,983,944 (Direct) | View |
| 2021-03-16 Tax Withholding | 2021-03-18 9:11 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 34,131 | $18.44 | 11,074,191 (Direct) | View |
| 2021-03-17 Option Award | 2021-03-18 9:11 pm | N/A 2031-03-17 | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 616,374 | $0 | 11,074,191 (Direct) | View |
| 2021-03-15 Tax Withholding | 2021-03-17 7:38 pm | N/A N/A | Amphastar Pharmaceuticals Inc. | AMPH | Zhang Jack Y. Luo Mary Z. CEO & Chief Scientific Officer 10% Owner | 37,680 | $19.15 | 10,491,948 (Direct) | View |