Form4insider filings, from the source

Company · CIK 0001568651 · SIC 6324 — Hospital & Medical Service Plans · NYSE

Oscar Health, Inc. · OSCR

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $64.0M · 10net −$64.0M
$10k$10k$1M$1M$100M$100MbuyssalesJun 28Jul 13Jul 28Aug 13Aug 28Sep 13Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 18, 2026 SForm 4 →Sep 22, 4:20 pm EDTVanessa Ames WittmanDirector25,000$32.24$806,000112,121−18.2%10b5-1
Sep 18, 2026 JForm 4 →Sep 18, 8:27 pm EDTJoshua KushnerCo-Founder and Vice Chairman, Director, 10% Owner19,030,851——0—
Sep 18, 2026 JForm 4 →Sep 18, 8:21 pm EDTThrive Partners II GP, LLC +8Director, 10% Owner19,030,851——0—
Sep 3, 2026 SForm 4 →Sep 8, 4:22 pm EDTJanet LiangPresident, Oscar Insurance10,360$31.45$325,822248,697−4.00%10b5-1
Sep 3, 2026 SForm 4 →Sep 8, 4:16 pm EDTVictoria BaltrusChief Accounting Officer958$31.45$30,129213,631−0.45%10b5-1
Sep 3, 2026 SForm 4 →Sep 8, 4:16 pm EDTRichard Scott BlackleyChief Financial Officer28,869$31.45$907,9301,046,108−2.69%10b5-1
Sep 3, 2026 SForm 4 →Sep 8, 4:16 pm EDTAdam McAnaneyChief Legal Officer9,092$31.45$285,943209,004−4.17%10b5-1
Sep 3, 2026 SForm 4 →Sep 8, 4:16 pm EDTMario SchlosserDirector31,422$31.45$988,222449,444−6.53%10b5-1
Aug 27, 2026 SForm 4 →Aug 31, 4:16 pm EDTMario SchlosserDirector750,000$30.43$22,822,500480,866−60.9%
Aug 27, 2026 CForm 4 →Aug 31, 4:16 pm EDTMario SchlosserDirector750,000——630,866—
Aug 18, 2026 SForm 4 →Aug 20, 4:16 pm EDTRichard Scott BlackleyChief Financial Officer18,750$31.74$595,12556,250−25.0%
Jul 1, 2026 SForm 4 →Jul 6, 4:11 pm EDTMario SchlosserDirector47,500$31.24$1,484,0140−100%10b5-1
Jul 1, 2026 CForm 4 →Jul 6, 4:11 pm EDTMario SchlosserDirector47,500——47,500—10b5-1
Jun 29, 2026 SForm 4 →Jul 1, 4:16 pm EDTMark T BertoliniChief Executive Officer, Director1,238,996$28.87$35,767,3227,751,570−13.8%10b5-1

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 18, 2026 JForm 4 →Sep 18, 8:27 pm EDTJoshua KushnerCo-Founder and Vice Chairman, Director, 10% Owner12,687,234——75,520—
Sep 18, 2026 JForm 4 →Sep 18, 8:21 pm EDTThrive Partners II GP, LLC +8Director, 10% Owner12,687,234——75,520—
Aug 27, 2026 CMForm 4 →Aug 31, 4:16 pm EDTMario SchlosserDirector2,250,000$9.75$7,312,5001,212,293—
Jul 9, 2026 AForm 4 →Jul 13, 4:16 pm EDTWilliam GassenDirector684$31.20$21,3417,071—
Jul 9, 2026 AForm 4 →Jul 13, 4:16 pm EDTSid SankaranDirector858$31.20$26,7702,061—
Jul 9, 2026 AForm 4 →Jul 13, 4:14 pm EDTDavid PlouffeDirector681$31.20$21,2477,535—
Jul 1, 2026 CForm 4 →Jul 6, 4:11 pm EDTMario SchlosserDirector47,500——538,333—10b5-1