Karen M. Anderson

Companies

• Centessa Pharmaceuticals plcChief People Officer Dec 5, 2022 to now¹
• Mimecast LtdChief Human Resources Officer Jan 3, 2019 to May 23, 2022²

Holdings

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

Shares held

• MMimecast Ltd0 shares³May 19, 2022
• CPCentessa Pharmaceuticals plc0 shares⁴Jun 24, 2026

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

Recent filings

• Jun 24, 2026Returned to company 62,085 shares of Centessa Pharmaceuticals plc⁴
• Mar 26, 2026Sold 41,076 shares at $30.12 of Centessa Pharmaceuticals plc⁵
• Mar 26, 2026Exercised options 41,076 shares at $8.01 of Centessa Pharmaceuticals plc⁵
• Mar 17, 2026Sold 10,043 shares at $28.10 of Centessa Pharmaceuticals plc⁶
• Mar 17, 2026Exercised options 10,043 shares at $4.01 of Centessa Pharmaceuticals plc⁶
• Mar 16, 2026Sold 64,768 shares at $28.21 of Centessa Pharmaceuticals plc⁶
• Mar 16, 2026Exercised options 64,768 shares at $4.01 of Centessa Pharmaceuticals plc⁶
• Mar 13, 2026Sold 12,068 shares at $27.13 of Centessa Pharmaceuticals plc⁷
• Mar 13, 2026Sold 107,961 shares at $26.15 of Centessa Pharmaceuticals plc⁷
• Mar 13, 2026Sold 12,068 shares at $27.13 of Centessa Pharmaceuticals plc⁸
• Mar 13, 2026Exercised options 15,174 shares at $3.85 of Centessa Pharmaceuticals plc⁷
• Mar 13, 2026Sold 107,961 shares at $26.15 of Centessa Pharmaceuticals plc⁸
• Mar 13, 2026Exercised options 94,224 shares at $4.01 of Centessa Pharmaceuticals plc⁷
• Mar 13, 2026Exercised options 109,398 shares at $4.01 of Centessa Pharmaceuticals plc⁸
• Feb 2, 2026Granted 29,000 shares of Centessa Pharmaceuticals plc⁹
• Feb 1, 2026Shares withheld for tax 10,606 shares at $24.57 of Centessa Pharmaceuticals plc⁹
• Feb 10, 2025Sold 429 shares at $18.99 of Centessa Pharmaceuticals plc¹⁰
• Feb 10, 2025Exercised options 429 shares at $4.01 of Centessa Pharmaceuticals plc¹⁰
• Feb 7, 2025Sold 30,526 shares at $19.03 of Centessa Pharmaceuticals plc¹⁰
• Feb 7, 2025Exercised options 30,526 shares at $4.01 of Centessa Pharmaceuticals plc¹⁰
• Feb 3, 2025Sold 6,471 shares at $16.86 of Centessa Pharmaceuticals plc¹¹
• Feb 1, 2025Shares withheld for tax 10,732 shares at $16.92 of Centessa Pharmaceuticals plc¹¹
• Dec 17, 2024Sold 10,624 shares at $17.32 of Centessa Pharmaceuticals plc¹²
• Dec 17, 2024Exercised options 10,624 shares at $3.85 of Centessa Pharmaceuticals plc¹²
• Dec 13, 2024Sold 5,876 shares at $17.01 of Centessa Pharmaceuticals plc¹²