Yakob Liawatidewi
EVP Corp Admin Center 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 · EVP CORP ADMIN CENTER
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 15, 2026 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −1,033 | $18.18 | $18,780 |
| Mar 10, 2026 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −1,870 | $18.91 | $35,362 |
| Mar 9, 2026 | Amphastar Pharmaceuticals Inc. | Grant or award | +35,450 | — | — |
| Mar 6, 2026 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −1,144 | $19.34 | $22,125 |
| Mar 4, 2026 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −965 | $19.96 | $19,261 |
| Mar 17, 2025 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −1,731 | $27.69 | $47,931 |
| Mar 15, 2025 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −1,031 | $26.66 | $27,486 |
| Mar 10, 2025 | Amphastar Pharmaceuticals Inc. | Grant or award | +20,837 | — | — |
| Mar 6, 2025 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −1,141 | $28.32 | $32,313 |
| Mar 4, 2025 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −963 | $27.62 | $26,598 |
| Nov 6, 2024 | Amphastar Pharmaceuticals Inc. | Option exercise | +5,214 | $13.03 | $67,938 |
| Nov 6, 2024 | Amphastar Pharmaceuticals Inc. | Open-market sale | −5,214 | $52.05 | $271,389 |
| Jun 4, 2024 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −272 | $42.22 | $11,484 |
| Mar 17, 2024 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −1,726 | $43.05 | $74,304 |
| Mar 16, 2024 | Amphastar Pharmaceuticals Inc. | Shares withheld for tax | −1,671 | $43.05 | $71,937 |
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