Latest insider trades

257 Form 4 trades in our database.

PPurchaseSSaleMOption exerciseAAward/GrantFTax withholdingGGift

Cloonan Michaelexercised17,574 shares ofSIONat $6.11$107KAug 26, 2025 · filed Aug 28, 2025Details
Ridloff Elenasold17,500 shares ofSIONat $22.69$397KAug 20, 2025 · filed Aug 21, 2025Details
Ridloff Elenasold34,500 shares ofSIONat $21.08$727KAug 19, 2025 · filed Aug 21, 2025Details
Cloonan Michaelsold25,000 shares ofSIONat $22.75$569KAug 20, 2025 · filed Aug 21, 2025Details
Cloonan Michaelexercised25,000 shares ofSIONat $6.11$153KAug 20, 2025 · filed Aug 21, 2025Details
TPG GP A, LLCbought60,000 shares ofSIONat $15.84$950KJun 27, 2025 · filed Jul 1, 2025Details
TPG GP A, LLCtraded1,765,541 shares ofSIONFeb 10, 2025 · filed Feb 12, 2025Details
TPG GP A, LLCtraded2,275,528 shares ofSIONFeb 10, 2025 · filed Feb 12, 2025Details
TPG GP A, LLCtraded1,806,318 shares ofSIONFeb 10, 2025 · filed Feb 12, 2025Details
TPG GP A, LLCtraded1,276,276 shares ofSIONFeb 10, 2025 · filed Feb 12, 2025Details
TPG GP A, LLCbought1,125,000 shares ofSIONat $18$20.3MFeb 10, 2025 · filed Feb 12, 2025Details
TPG GP A, LLCtraded4,875,547 shares ofSIONFeb 10, 2025 · filed Feb 12, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded1,091,219 shares ofSIONat $0Feb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded4,364,874 shares ofSIONat $0Feb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded2,155,469 shares ofSIONat $0Feb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded923,773 shares ofSIONat $0Feb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded124,908 shares ofSIONat $0Feb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded451,580 shares ofSIONat $0Feb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded1,229,830 shares ofSIONat $0Feb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded138,054 shares ofSIONat $0Feb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded319,069 shares ofSIONat $0Feb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded819,153 shares ofSIONat $0Feb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.bought102,414 shares ofSIONat $18$1.8MFeb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.bought1,022,586 shares ofSIONat $18$18.4MFeb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded179,975 shares ofSIONFeb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded2,222,084 shares ofSIONFeb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded527,444 shares ofSIONFeb 10, 2025Details
RA CAPITAL MANAGEMENT, L.P.traded5,021,990 shares ofSIONFeb 10, 2025Details
Viney Joanne L.granted39,919 shares ofSIONat $0Feb 6, 2025 · filed Feb 10, 2025Details
Cloonan Michaelgranted450,252 shares ofSIONat $0Feb 6, 2025 · filed Feb 10, 2025Details
Ridloff Elenagranted157,820 shares ofSIONat $0Feb 6, 2025 · filed Feb 10, 2025Details
Thompson Peter A.traded2,048,760 shares ofSIONat $0Feb 10, 2025Details
Thompson Peter A.traded2,560,951 shares ofSIONat $0Feb 10, 2025Details
Thompson Peter A.bought550,000 shares ofSIONat $18$9.9MFeb 10, 2025Details
Thompson Peter A.traded3,154,959 shares ofSIONFeb 10, 2025Details
Atlas Venture Fund XI, L.P.traded1,092,504 shares ofSIONat $0Feb 10, 2025Details
Atlas Venture Fund XI, L.P.traded61,463 shares ofSIONat $0Feb 10, 2025Details
Atlas Venture Fund XI, L.P.traded1,298,332 shares ofSIONat $0Feb 10, 2025Details
Atlas Venture Fund XI, L.P.traded1,806,317 shares ofSIONat $0Feb 10, 2025Details
Atlas Venture Fund XI, L.P.traded1,051,051 shares ofSIONat $0Feb 10, 2025Details
Atlas Venture Fund XI, L.P.bought60,000 shares ofSIONat $18$1.1MFeb 10, 2025Details
Atlas Venture Fund XI, L.P.traded747,727 shares ofSIONFeb 10, 2025Details
Atlas Venture Fund XI, L.P.traded2,886,293 shares ofSIONFeb 10, 2025Details
Booth Brucetraded1,092,504 shares ofSIONat $0Feb 10, 2025Details
Booth Brucetraded61,463 shares ofSIONat $0Feb 10, 2025Details
Booth Brucetraded1,298,332 shares ofSIONat $0Feb 10, 2025Details
Booth Brucetraded1,806,317 shares ofSIONat $0Feb 10, 2025Details
Booth Brucetraded1,051,051 shares ofSIONat $0Feb 10, 2025Details
Booth Brucebought60,000 shares ofSIONat $18$1.1MFeb 10, 2025Details
Booth Brucetraded747,727 shares ofSIONFeb 10, 2025Details