Howard Lee

Director, OPTIMER PHARMACEUTICALS INC.

Companies

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

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

Jun 2, 2026Shares withheld for tax 769 shares at $18.45 of Amphastar Pharmaceuticals, Inc.²
Jun 1, 2026Granted 8,143 shares of Amphastar Pharmaceuticals, Inc.²
Jun 3, 2025Shares withheld for tax 923 shares at $26.01 of Amphastar Pharmaceuticals, Inc.³
Jun 2, 2025Granted 5,122 shares of Amphastar Pharmaceuticals, Inc.³
Jun 5, 2024Shares withheld for tax 579 shares at $42.04 of Amphastar Pharmaceuticals, Inc.⁴
Jun 3, 2024Granted 3,076 shares of Amphastar Pharmaceuticals, Inc.⁴
Jun 10, 2023Shares withheld for tax 375 shares at $45.67 of Amphastar Pharmaceuticals, Inc.⁵
Jun 5, 2023Granted 2,716 shares of Amphastar Pharmaceuticals, Inc.⁶
Jun 1, 2023Sold 16,679 shares at $45.02 of Amphastar Pharmaceuticals, Inc.⁷
Jun 1, 2023Exercised options 16,679 shares at $16.69 of Amphastar Pharmaceuticals, Inc.⁷
Jun 10, 2022Granted 4,163 shares of Amphastar Pharmaceuticals, Inc.⁸
Jun 6, 2022Sold 10,291 shares at $37.79 of Amphastar Pharmaceuticals, Inc.⁹
Jun 6, 2022Exercised options 10,291 shares at $17.11 of Amphastar Pharmaceuticals, Inc.⁹
May 23, 2022Sold 10,000 shares at $34.93 of Amphastar Pharmaceuticals, Inc.¹⁰
May 23, 2022Exercised options 10,000 shares at $17.11 of Amphastar Pharmaceuticals, Inc.¹⁰

The numbers on this page point here. Each one links to the record it came from.