$SION 3 SEC Filings

Filed On	Filing
03 Oct 2025	Form 3: Beer Caroline Stark, Chief Business Officer No securities owned
01 Apr 2025	Form 3: Fitzpatrick Jennifer, Chief Legal Officer
06 Feb 2025	Form 3: Tpg Gp A, Llc, 10% owner and 2 others Holds 684,415 shares of Common Stock
06 Feb 2025	Form 3: Stelzer Laurie, Director
06 Feb 2025	Form 3: Orbimed Advisors Llc, Director and 1 other
06 Feb 2025	Form 3: McKee Charlotte, Chief Medical Officer Holds 28,415 shares of Common Stock
06 Feb 2025	Form 3: Iancovici Lucian, Director No securities owned
06 Feb 2025	Form 3: Ruddy Marcella K., Director No securities owned
06 Feb 2025	Form 3: Atlas Venture Fund XI, L.p., 10% owner and 5 others
06 Feb 2025	Form 3: Cloonan Michael, Director Holds 547,343 shares of Common Stock
06 Feb 2025	Form 3: Ra Capital MANAGEMENT, L.p., Director and 5 others Holds 878,789 shares of Common Stock
06 Feb 2025	Form 3: Thompson Peter A., Director
06 Feb 2025	Form 3: Viney Joanne L., Director No securities owned
06 Feb 2025	Form 3: Resnick Joshua, Director No securities owned
06 Feb 2025	Form 3: Fleming Harold Edward, Director No securities owned
06 Feb 2025	Form 3: Clancy Paul J, Director
06 Feb 2025	Form 3: Ridloff Elena, CFO & Head of Corp. Dev. Holds 123,532 shares of Common Stock
06 Feb 2025	Form 3: Booth Bruce, Director

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