X0508 4 2026-01-06 false 0001568651 Oscar Health, Inc. OSCR 0001844320 Schlosser Mario 75 VARICK STREET, 5TH FLOOR NEW YORK NY 10013 true true false false President of Technology & CTO true Class A Common Stock 2026-01-06 4 C false 76962.00 A 427142.00 D Class A Common Stock 2026-01-06 4 S false 76962.00 17.01 D 350180.00 D Class B Common Stock 2026-01-06 4 C false 76962.00 0.00 D Class A Common Stock 76962.00 1455331.00 D Class B Common Stock Class A Common Stock 333333.00 333333.00 I By Noah Pizzo-Schlosser Dynasty Trust Class B Common Stock Class A Common Stock 633333.00 633333.00 I By Pizzo-Schlosser Family Dynasty Trust Class B Common Stock Class A Common Stock 333333.00 333333.00 I By Siena Pizzo-Schlosser Dynasty Trust The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on September 23, 2025. The Class B common stock is convertible at any time at the option of the holder into Class A common stock on a one-to-one basis, subject to certain exceptions, and will mandatorily convert into Class A common stock on the date that is seven years from the date of the prospectus used in connection with the Issuer's initial public offering and upon the occurrence of certain events as set forth in the Issuer's certificate of incorporation. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.00 to $17.05, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price at which the transactions were effected. Mr. Schlosser disclaims beneficial ownership over the shares held of record by the trust except to the extent of his pecuniary interest therein, if any. /s/ Melissa Curtin, Attorney-in-fact 2026-01-08