Heather L. Mason

Companies

• Immatics N.V.Board member Mar 18, 2026 to now¹
• Assertio Holdings, Inc.Board member May 21, 2020 to now²
• Assertio Holdings, Inc.Interim Executive Officer Jun 6, 2024 to Jun 6, 2024³
• Assertio Holdings, Inc.Chief executive officer Jan 4, 2024 to Jan 4, 2024⁴
• Abbott LaboratoriesSenior Vice President May 5, 2008 to Jul 5, 2017⁵

Holdings

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

Shares held

• Abbott Laboratories ABT129,064 shares⁶$13.5M at $104.71Jul 5, 2017
• AAssertio Holdings, Inc.0 shares⁷Jun 16, 2026

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

Recent filings

• Jun 16, 2026U 6,666 shares of Assertio Holdings, Inc.⁷
• Jun 16, 2026U 20,944 shares of Assertio Holdings, Inc.⁷
• May 13, 2026Gift 6,666 shares of Assertio Holdings, Inc.⁸
• May 13, 2026Gift 6,666 shares of Assertio Holdings, Inc.⁸
• May 5, 2026Granted 4,851 shares of Assertio Holdings, Inc.⁹
• May 7, 2025Granted 53,750 shares of Assertio Holdings, Inc.¹⁰
• Nov 18, 2024Bought 75,000 shares at $0.80 of Assertio Holdings, Inc.¹¹
• Jun 5, 2024Bought 25,000 shares at $0.97 of Assertio Holdings, Inc.¹²
• May 19, 2023Sold 89,286 shares at $7.30 of Assertio Holdings, Inc.¹³
• May 10, 2023Granted 31,194 shares of Assertio Holdings, Inc.¹⁴
• May 4, 2022Granted 86,286 shares of Assertio Holdings, Inc.¹⁵
• Feb 18, 2022Exercised options 3,598 shares of Assertio Holdings, Inc.¹⁶
• Jul 1, 2017Shares withheld for tax 613 shares at $48.61 of Abbott Laboratories⁶
• Feb 28, 2017Sold 100 shares at $45.01 of Abbott Laboratories¹⁷
• Feb 28, 2017Sold 134 shares at $45.01 of Abbott Laboratories¹⁷
• Feb 28, 2017Sold 1,678 shares at $45.02 of Abbott Laboratories¹⁷
• Feb 28, 2017Shares withheld for tax 8,530 shares at $45.46 of Abbott Laboratories¹⁷
• Feb 17, 2017Granted 5,630 shares of Abbott Laboratories¹⁸
• Jan 31, 2017Sold 35,700 shares at $40.77 of Abbott Laboratories¹⁹
• Jan 31, 2017Exercised options 35,700 shares at $25.25 of Abbott Laboratories¹⁹
• Jul 1, 2016Shares withheld for tax 613 shares at $39.31 of Abbott Laboratories²⁰
• Feb 29, 2016Sold 1,432 shares at $39.27 of Abbott Laboratories²¹
• Feb 29, 2016Sold 1,600 shares at $39.27 of Abbott Laboratories²¹
• Feb 29, 2016Shares withheld for tax 7,155 shares at $39.52 of Abbott Laboratories²¹
• Feb 19, 2016Granted 24,414 shares of Abbott Laboratories²²