144 0001842979 XXXXXXXX LIVE 0001568651 Oscar Health, Inc. 001-40154 75 Varick Street, 5th Floor New York NY 10013 646-403-3677 Adam McAnaney Chief Legal Officer Common Stock Morgan Stanley Smith Barney LLC

Executive Financial Services 1 New York Plaza, 8th Floor New York NY 10004

10832 240795.36 265902000 06/02/2026 NYSE Common Stock 06/01/2026 Restricted stock units vesting under a registered plan Issuer N 18447 06/01/2026 Services Rendered N Adam McAnaney

75 Varick Street, 5th Floor New York NY 10013

Common Stock 03/02/2026 18710 250526.90 06/02/2026 08/08/2025 Melissa Curtin, Attorney-in-Fact for Adam McAnaney