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SION
Not investment advice · 13F data lagged ~45 days · Full disclaimer
SI

Who's buying SION
Share price · market data, not from 13F reports
—
Insider trades (Form 4)
Last 2 years · 49 filings
Net buying$259.88M
DateInsiderTypeSharesPriceValue
Sep 17, 2026
Ra Capital Management, L.P.
Director & 10% Owner
Sold3,448,811$6.33$21.84M
Jul 7, 2026
Peter A. Thompson
Director
Sold85,918$44.86$3.85M
Jul 7, 2026
Orbimed Advisors LLC
Director
Sold85,918$44.86$3.85M
Jul 6, 2026
Jennifer Fitzpatrick
Sold10,250$43.60$447K
Jun 30, 2026
Peter A. Thompson
Director
Sold115,844$45.50$5.27M
Jun 30, 2026
Orbimed Advisors LLC
Director
Sold115,844$45.50$5.27M
May 27, 2026
Peter A. Thompson
Director
Sold101$44.49$4K
May 27, 2026
Orbimed Advisors LLC
Director
Sold101$44.49$4K
May 7, 2026
Peter A. Thompson
Director
Sold292,952$45.62$13.36M
May 7, 2026
Orbimed Advisors LLC
Director
Sold292,952$45.62$13.36M
Apr 17, 2026
Peter A. Thompson
Director
Sold55,345$44.67$2.47M
Apr 17, 2026
Orbimed Advisors LLC
Director
Sold55,345$44.67$2.47M
Apr 14, 2026
Peter A. Thompson
Director
Sold510,583$44.94$22.95M
Apr 14, 2026
Orbimed Advisors LLC
Director
Sold510,583$44.94$22.95M
Mar 5, 2026
Jennifer Fitzpatrick
Sold10,250$33.86$347K
Feb 2, 2026
Peter A. Thompson
Director
Sold30,953$44.58$1.38M
Feb 2, 2026
Orbimed Advisors LLC
Director
Sold30,953$44.58$1.38M
Jan 22, 2026
Tpg Gp A, LLC
10% Owner
Sold250,000$40.00$10.00M
Dec 24, 2025
Orbimed Advisors LLC
Director
Sold33,356$44.55$1.49M
Dec 24, 2025
Peter A. Thompson
Director
Sold33,356$44.55$1.49M
Dec 17, 2025
Orbimed Advisors LLC
Director
Sold1,875$44.49$83K
Dec 17, 2025
Peter A. Thompson
Director
Sold1,875$44.49$83K
Dec 5, 2025
Jennifer Fitzpatrick
Sold10,250$40.52$415K
Nov 24, 2025
Orbimed Advisors LLC
Director
Sold108,073$44.55$4.81M
Nov 24, 2025
Peter A. Thompson
Director
Sold108,073$44.55$4.81M
Nov 20, 2025
Ra Capital Management, L.P.
Director & 10% Owner
Sold30,316$39.61$1.20M
Nov 17, 2025
Ra Capital Management, L.P.
Director & 10% Owner
Sold136,351$40.34$5.50M
Oct 24, 2025
Ra Capital Management, L.P.
Director & 10% Owner
Sold373,610$39.51$14.76M
Oct 21, 2025
Michael Cloonan
President & CEO
Sold99,800$36.26$3.62M
Oct 21, 2025
Bruce Booth
Director
Sold88,878$34.22$3.04M
Oct 16, 2025
Bruce Booth
Director
Sold286,369$32.30$9.25M
Oct 15, 2025
Michael Cloonan
President & CEO
Sold25,200$31.28$788K
Oct 10, 2025
Bruce Booth
Director
Sold194,932$30.47$5.94M
Oct 3, 2025
Bruce Booth
Director
Sold49,546$29.99$1.49M
Sep 29, 2025
Bruce Booth
Director
Sold78,693$30.08$2.37M
Sep 26, 2025
Michael Cloonan
President & CEO
Sold25,000$29.11$728K
Sep 4, 2025
Jennifer Fitzpatrick
Sold10,250$23.12$237K
Aug 29, 2025
Elena Ridloff
CFO
Sold9,584$25.09$240K
Aug 26, 2025
Michael Cloonan
President & CEO
Sold25,000$24.97$624K
Aug 26, 2025
Elena Ridloff
CFO
Sold23,416$25.70$602K
Aug 20, 2025
Michael Cloonan
President & CEO
Sold25,000$22.75$569K
Aug 19, 2025
Elena Ridloff
CFO
Sold52,000$21.62$1.12M
Jun 27, 2025
Tpg Gp A, LLC
10% Owner
Bought60,000$15.84$950K
Feb 10, 2025
Tpg Gp A, LLC
10% Owner
Bought1,125,000$18.00$20.25M
Feb 10, 2025
Ra Capital Management, L.P.
Director & 10% Owner
Bought1,125,000$18.00$20.25M
Feb 10, 2025
Orbimed Advisors LLC
Director
Bought550,000$18.00$9.90M
Feb 10, 2025
Peter A. Thompson
Director
Bought550,000$18.00$9.90M
Feb 10, 2025
Bruce Booth
Director
Bought60,000$18.00$1.08M
Feb 10, 2025
Atlas Venture Fund Xi, L.P.
10% Owner
Bought60,000$18.00$1.08M