Yakob Liawatidewi

Companies

• Amphastar Pharmaceuticals, Inc.Board member Apr 12, 2023 to now¹
• Amphastar Pharmaceuticals, Inc.SVP Corp Admin Center Jun 18, 2018 to now²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• APAmphastar Pharmaceuticals, Inc. AMPH124,351 shares³$3.2M at $26.00Mar 17, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Mar 15, 2026Shares withheld for tax 1,033 shares at $18.18 of Amphastar Pharmaceuticals, Inc.³
• Mar 10, 2026Shares withheld for tax 1,870 shares at $18.91 of Amphastar Pharmaceuticals, Inc.⁴
• Mar 9, 2026Granted 35,450 shares of Amphastar Pharmaceuticals, Inc.⁴
• Mar 6, 2026Shares withheld for tax 1,144 shares at $19.34 of Amphastar Pharmaceuticals, Inc.⁵
• Mar 4, 2026Shares withheld for tax 965 shares at $19.96 of Amphastar Pharmaceuticals, Inc.⁶
• Mar 17, 2025Shares withheld for tax 1,731 shares at $27.69 of Amphastar Pharmaceuticals, Inc.⁷
• Mar 15, 2025Shares withheld for tax 1,031 shares at $26.66 of Amphastar Pharmaceuticals, Inc.⁷
• Mar 10, 2025Granted 20,837 shares of Amphastar Pharmaceuticals, Inc.⁸
• Mar 6, 2025Shares withheld for tax 1,141 shares at $28.32 of Amphastar Pharmaceuticals, Inc.⁹
• Mar 4, 2025Shares withheld for tax 963 shares at $27.62 of Amphastar Pharmaceuticals, Inc.¹⁰
• Nov 6, 2024Sold 5,214 shares at $52.05 of Amphastar Pharmaceuticals, Inc.¹¹
• Nov 6, 2024Exercised options 5,214 shares at $13.03 of Amphastar Pharmaceuticals, Inc.¹¹
• Jun 4, 2024Shares withheld for tax 272 shares at $42.22 of Amphastar Pharmaceuticals, Inc.¹²
• Mar 17, 2024Shares withheld for tax 1,726 shares at $43.05 of Amphastar Pharmaceuticals, Inc.¹³
• Mar 16, 2024Shares withheld for tax 1,671 shares at $43.05 of Amphastar Pharmaceuticals, Inc.¹³
• Mar 15, 2024Shares withheld for tax 1,027 shares at $43.05 of Amphastar Pharmaceuticals, Inc.¹³
• Mar 6, 2024Shares withheld for tax 1,221 shares at $46.31 of Amphastar Pharmaceuticals, Inc.¹⁴
• Mar 4, 2024Granted 10,754 shares of Amphastar Pharmaceuticals, Inc.¹⁵
• Aug 28, 2023Sold 28,816 shares at $53.13 of Amphastar Pharmaceuticals, Inc.¹⁶
• Aug 28, 2023Exercised options 20,000 shares at $13.03 of Amphastar Pharmaceuticals, Inc.¹⁶
• Aug 28, 2023Exercised options 5,497 shares at $20.23 of Amphastar Pharmaceuticals, Inc.¹⁶
• Aug 28, 2023Exercised options 3,319 shares at $16.96 of Amphastar Pharmaceuticals, Inc.¹⁶
• Jun 4, 2023Shares withheld for tax 378 shares at $46.70 of Amphastar Pharmaceuticals, Inc.¹⁷
• Apr 13, 2023Sold 6,494 shares at $42.00 of Amphastar Pharmaceuticals, Inc.¹⁸
• Apr 13, 2023Sold 5,000 shares at $41.00 of Amphastar Pharmaceuticals, Inc.¹⁸