Martin Mackay

Companies

• Kailera Therapeutics, Inc.Board member Apr 16, 2026 to now¹
• SpringWorks Therapeutics, Inc.Board member Jul 30, 2024 to now²
• RallybioBoard member Jul 29, 2021 to now³
• Charles River LaboratoriesBoard member Jul 7, 2017 to now⁴
• RallybioChair Feb 16, 2024 to Feb 16, 2024⁵
• RallybioChief executive officer Jul 29, 2021 to Feb 6, 2023³
• 5:01 Acquisition Corp.Board member Oct 13, 2020 to Oct 20, 2020⁶
• Alexion PharmaceuticalsEVP & Global Head of R&D May 15, 2013 to Mar 1, 2017⁷
• PfizerSenior Vice President Oct 12, 2007 to May 18, 2010⁸

Holdings

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

Shares held

• Rallybio RLYB719,126 shares⁹$11.7M at $16.33Jan 11, 2022
• Pfizer PFE389,172 shares¹⁰$11.5M at $29.54Mar 1, 2010
• STSpringWorks Therapeutics, Inc.0 shares¹¹Jul 1, 2025

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

Recent filings

• May 8, 2026Granted 1,407 shares at $177.62 of CIK 1100682¹²
• May 8, 2026Granted 1,438 shares at $177.62 of CIK 1100682¹²
• Jul 1, 2025Returned to company 20,023 shares of SpringWorks Therapeutics, Inc.¹¹
• May 21, 2025Granted 815 shares at $134.98 of CIK 1100682¹³
• May 21, 2025Granted 946 shares at $134.98 of CIK 1100682¹³
• May 14, 2025Granted 10,060 shares of SpringWorks Therapeutics, Inc.¹⁴
• Jul 29, 2024Granted 9,963 shares of SpringWorks Therapeutics, Inc.¹⁵
• May 13, 2024Granted 372 shares at $228.41 of CIK 1100682¹⁶
• May 13, 2024Granted 559 shares at $228.41 of CIK 1100682¹⁶
• Jul 3, 2023Granted 95 shares of CIK 1100682¹⁷
• May 31, 2023Granted 338 shares of CIK 1100682¹⁸
• May 15, 2023Granted 664 shares of CIK 1100682¹⁹
• May 11, 2022Granted 292 shares of CIK 1100682²⁰
• May 11, 2022Granted 549 shares of CIK 1100682²⁰
• Jan 11, 2022Bought 4,496 shares at $10.65 of Rallybio⁹
• Jan 10, 2022Bought 5,504 shares at $10.10 of Rallybio⁹
• Jan 3, 2022Granted 63 shares of CIK 1100682²¹
• Jul 28, 2021Other 436,517 shares of Rallybio⁹
• Jul 28, 2021Other 272,609 shares of Rallybio⁹
• Feb 25, 2010Shares withheld for tax 1,127 shares at $17.69 of Pfizer¹⁰
• Feb 25, 2010Granted 3,471 shares of Pfizer¹⁰
• Feb 25, 2010Granted 66,017 shares of Pfizer¹⁰
• Feb 26, 2009Shares withheld for tax 5,837 shares at $12.70 of Pfizer²²
• Feb 26, 2009Granted 37,114 shares of Pfizer²²
• Feb 26, 2009Granted 99,868 shares of Pfizer²²