Mary Z. Luo
COO,Chief Scientist & Chairman at Amphastar Pharmaceuticals Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: Amphastar Pharmaceuticals Inc., 3 years.
Amphastar Pharmaceuticals Inc.
Director · COO, Chief Scientist, Chairman
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Mar 6, 2026 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −7,773 | $19.34 | $150,330 |
| Mar 6, 2026 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −3,077 | $19.34 | $59,509 |
| Mar 4, 2025 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −5,753 | $27.62 | $158,898 |
| Mar 4, 2025 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −2,426 | $27.62 | $67,006 |
| Nov 11, 2024 | Amphastar Pharmaceuticals Inc. | Gift | −125,000 | — | — |
| Nov 11, 2024 | Amphastar Pharmaceuticals Inc. | Gift | −125,000 | — | — |
| Mar 17, 2024 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −15,768 | $43.05 | $678,812 |
| Mar 17, 2024 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −7,052 | $43.05 | $303,589 |
| Mar 15, 2024 | Amphastar Pharmaceuticals Inc. | Option exercise | +722,046 | $12.46 | $8,996,693 |
| Mar 15, 2024 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −408,721 | $43.05 | $17,595,439 |
| Mar 15, 2024 | Amphastar Pharmaceuticals Inc. | Option exercise | +310,930 | $12.46 | $3,874,188 |
| Mar 15, 2024 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −202,658 | $43.05 | $8,724,427 |
| Mar 6, 2024 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −7,031 | $46.31 | $325,606 |
| Mar 6, 2024 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −2,990 | $46.31 | $138,467 |
| Jan 9, 2024 | Amphastar Pharmaceuticals Inc. | Open-market sale | −50,678 | $56.70 | $2,873,443 |
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