Stephen F. Mahoney

Companies

• Viridian Therapeutics, Inc.\DEBoard member Nov 1, 2023 to now¹
• Viridian Therapeutics, Inc.\DEChief executive officer Nov 1, 2023 to now¹
• Viridian Therapeutics, Inc.\DEPresident Nov 1, 2023 to now¹
• Magenta TherapeuticsOfficer Nov 4, 2020 to Dec 2, 2022²
• Kiniksa Pharmaceuticals International, plcChief operating officer May 23, 2018 to Sep 19, 2019³
• Kiniksa Pharmaceuticals International, plcPresident May 23, 2018 to Sep 19, 2019³

Holdings

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

Shares held

• MTMagenta Therapeutics DNTH17,264 shares⁴$1.3M at $74.77Nov 30, 2022
• VTViridian Therapeutics, Inc.\DE VRDN33,349 shares⁵$691.0K at $20.72Mar 3, 2026

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

Recent filings

• Mar 3, 2026Shares withheld for tax 7,627 shares at $29.32 of Viridian Therapeutics, Inc.\DE⁶
• Mar 3, 2026Shares withheld for tax 7,408 shares at $30.19 of Viridian Therapeutics, Inc.\DE⁵
• Mar 3, 2026Exercised options 18,357 shares of Viridian Therapeutics, Inc.\DE⁶
• Sep 27, 2024Bought 21,400 shares at $23.33 of Viridian Therapeutics, Inc.\DE⁷
• Nov 30, 2022Granted 3,000 shares at $0.94 of Magenta Therapeutics⁴