Simon Read
Chief Scientific Officer, Ra Pharmaceuticals, Inc.
Companies
- Magenta TherapeuticsBoard member May 22, 2025 to now1
Holdings
Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.
Shares held
- Magenta Therapeutics DNTH0 shares2Aug 19, 2026
As of each latest filing. The line shows shares held over time.
Recent filings
- Aug 19, 2026Sold 2,778 shares at $117.55 of Magenta Therapeutics2
- Aug 19, 2026Exercised options 2,778 shares at $18.36 of Magenta Therapeutics2
- Aug 10, 2026Sold 397 shares at $111.77 of Magenta Therapeutics3
- Aug 10, 2026Sold 470 shares at $111.05 of Magenta Therapeutics3
- Aug 10, 2026Sold 272 shares at $109.96 of Magenta Therapeutics3
- Aug 10, 2026Sold 831 shares at $108.95 of Magenta Therapeutics3
- Aug 10, 2026Sold 737 shares at $108.17 of Magenta Therapeutics3
- Aug 10, 2026Sold 70 shares at $107.11 of Magenta Therapeutics3
- Aug 10, 2026Exercised options 2,777 shares at $18.36 of Magenta Therapeutics3
Sources
The numbers on this page point here. Each one links to the record it came from.
- 1SEC EDGARMagenta Therapeutics, Board member
- 2
- 3SEC EDGARForm 4 filed Aug 11, 2026