Frank E. Thomas

Companies

• Spero Therapeutics, Inc.Board member Nov 1, 2017 to now¹
• Zafgen (United States)Board member Jun 18, 2014 to now²
• Orchard Therapeutics plcOfficer Jan 2, 2020 to Jan 24, 2024³
• AMAG PharmaceuticalsPresident Feb 2, 2012 to Feb 27, 2017⁴
• AMAG PharmaceuticalsChief operating officer Dec 2, 2011 to Feb 27, 2017⁵
• AMAG PharmaceuticalsChief executive officer Dec 2, 2011 to Apr 2, 2012⁵
• AMAG PharmaceuticalsChief financial officer Aug 1, 2011 to Jan 4, 2012⁶

Holdings

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

Shares held

• STSpero Therapeutics, Inc. SPRO85,000 shares⁷$96.9K at $1.14Jun 23, 2026
• ZUZafgen (United States) LRMR7,000 shares⁸$13.9K at $1.99Feb 27, 2026
• OTOrchard Therapeutics plc0 shares⁹Jan 24, 2024

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

Recent filings

• Jun 23, 2026Granted 10,000 shares of Spero Therapeutics, Inc.⁷
• Feb 27, 2026Bought 5,000 shares at $5.00 of Zafgen (United States)⁸
• Jun 12, 2025Granted 20,000 shares of Spero Therapeutics, Inc.¹⁰
• May 29, 2024Granted 20,000 shares of Spero Therapeutics, Inc.¹¹
• Feb 14, 2024Bought 2,000 shares at $11.00 of Zafgen (United States)¹²
• Jan 24, 2024Returned to company 92,081 shares of Orchard Therapeutics plc⁹
• Oct 5, 2023Granted 20,000 shares of Spero Therapeutics, Inc.¹³
• Mar 10, 2023Exercised options 20,000 shares at $0.46 of Orchard Therapeutics plc¹⁴
• Feb 9, 2023Exercised options 20,000 shares at $0.46 of Orchard Therapeutics plc¹⁵
• Sep 15, 2022Granted 15,000 shares of Spero Therapeutics, Inc.¹⁶
• Apr 1, 2022Bought 10,000 shares at $0.75 of Orchard Therapeutics plc¹⁷