Thomas Desrosier

Companies

• Seres Therapeutics, Inc.General counsel Jan 27, 2017 to now¹
• Seres Therapeutics, Inc.Officer May 17, 2016 to now²
• ARIAD PharmaceuticalsGeneral counsel Jan 30, 2015 to Mar 30, 2016³
• Cubist PharmaceuticalsGeneral counsel Mar 27, 2013 to Feb 19, 2014⁴

Holdings

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

Shares held

• STSeres Therapeutics, Inc. MCRB8,117 shares⁵$20.0K at $2.46Aug 17, 2026

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

Recent filings

• Aug 17, 2026Sold 82 shares at $4.55 of Seres Therapeutics, Inc.⁵
• Aug 15, 2026Exercised options 245 shares of Seres Therapeutics, Inc.⁵
• May 18, 2026Sold 79 shares at $7.53 of Seres Therapeutics, Inc.⁶
• May 15, 2026Exercised options 244 shares of Seres Therapeutics, Inc.⁶
• Feb 15, 2026Sold 78 shares at $8.47 of Seres Therapeutics, Inc.⁷
• Feb 15, 2026Exercised options 244 shares of Seres Therapeutics, Inc.⁷
• Nov 15, 2025Sold 76 shares at $17.30 of Seres Therapeutics, Inc.⁸
• Nov 15, 2025Exercised options 112 shares of Seres Therapeutics, Inc.⁸
• Nov 15, 2025Exercised options 132 shares of Seres Therapeutics, Inc.⁸
• Aug 18, 2025Sold 76 shares at $16.65 of Seres Therapeutics, Inc.⁹
• Aug 15, 2025Exercised options 111 shares of Seres Therapeutics, Inc.⁹
• Aug 15, 2025Exercised options 133 shares of Seres Therapeutics, Inc.⁹
• May 15, 2025Sold 79 shares at $7.28 of Seres Therapeutics, Inc.¹⁰
• May 15, 2025Exercised options 111 shares of Seres Therapeutics, Inc.¹⁰
• May 15, 2025Exercised options 133 shares of Seres Therapeutics, Inc.¹⁰
• Feb 18, 2025Sold 4,300 shares at $0.81 of Seres Therapeutics, Inc.¹¹
• Feb 15, 2025Exercised options 8,907 shares of Seres Therapeutics, Inc.¹¹
• Feb 15, 2025Exercised options 2,657 shares of Seres Therapeutics, Inc.¹¹
• Nov 18, 2024Sold 878 shares at $0.54 of Seres Therapeutics, Inc.¹²
• Nov 15, 2024Exercised options 2,656 shares of Seres Therapeutics, Inc.¹²
• Oct 28, 2024Sold 4,259 shares at $0.69 of Seres Therapeutics, Inc.¹³
• Oct 27, 2024Exercised options 13,500 shares of Seres Therapeutics, Inc.¹³
• Aug 16, 2024Sold 873 shares at $0.84 of Seres Therapeutics, Inc.¹⁴
• Aug 15, 2024Exercised options 2,656 shares of Seres Therapeutics, Inc.¹⁴
• May 15, 2024Sold 843 shares at $0.94 of Seres Therapeutics, Inc.¹⁵