X0306 4 2021-03-05 0 0001568651 Oscar Health, Inc. OSCR 0001844320 Schlosser Mario 75 VARICK STREET, 5TH FLOOR NEW YORK NY 10013 1 1 0 0 Chief Executive Officer Class A Common Stock 2021-03-05 4 S 0 146514 39.00 D 0 D Class A Common Stock 2021-03-05 4 C 0 219772 A 219772 I By Pizzo-Schlosser 2020 GRAT and Spousal Trust Class A Common Stock 2021-03-05 4 S 0 219772 39.00 D 0 I By Pizzo-Schlosser 2020 GRAT and Spousal Trust Performance Restricted Stock Units 2021-03-05 4 A 0 4229853 0.00 A 2028-03-05 Class A Common Stock 4229853 4229853 D Restricted Stock Units 2021-03-05 4 A 0 17 0.00 A Class A Common Stock 17 17 D Class B Common Stock 2021-03-05 4 C 0 219772 D Class A Common Stock 219772 956744 I By Pizzo-Schlosser 2020 GRAT and Spousal Trust Class B Common Stock Class A Common Stock 333333 333333 I By Noah Pizzo-Schlosser Dynasty Trust Class B Common Stock Class A Common Stock 633333 633333 I By Pizzo-Schlosser Family Dynasty Trust Class B Common Stock Class A Common Stock 333333 333333 I By Siena Pizzo-Schlosser Dynasty Trust 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. 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. Each performance restricted stock unit represents a contingent right to receive one share of Class A common stock. The performance restricted stock units vest upon the Issuer's common stock achieving certain specified price per share targets ranging from $90 to $270 per share. Each restricted stock unit represents a contingent right to receive one share of Class A common stock. The restricted stock units vest upon the earlier of (i) 180 days after the IPO date, or (ii) the second day following the expiration of the underwriter-mandated lock-up period associated with the Issuer's initial public offering. /s/ Harold Greenberg, Attorney-in-fact 2021-03-05