144 0001844320 XXXXXXXX LIVE 0001568651 Oscar Health, Inc. 001-40154 75 VARICK STREET 5TH FLOOR NEW YORK NY 10013 (646) 403-3677 Schlosser Mario Officer Director Class A Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

150000 4618990.73 273469000 08/28/2026 NYSE Class A 08/28/2026 Stock Option Exercise Issuer N 150000 08/28/2026 Cash N Mario T. Schlosser

75 Varick Street 5th Floor New York NY 10013

Class A 06/02/2026 34120 748633.08 Mario T. Schlosser

75 Varick Street 5th Floor New York NY 10013

Class A 06/23/2026 1027398 30183414.00 Mario T. Schlosser

75 Varick Street 5th Floor New York NY 10013

Class A 07/01/2026 47500 1484013.80 Mario T. Schlosser

75 Varick Street 5th Floor New York NY 10013

Class A 08/27/2026 600000 18205485.10 08/28/2026 /s/ Gary Redman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mario T. Schlosser