X0306 4 2021-08-31 0 0001568651 Oscar Health, Inc. OSCR 0001770749 Joyce Meghan V. 75 VARICK STREET, 5TH FLOOR NEW YORK NY 10013 0 1 0 0 Chief Operating Officer Class A Common Stock 2021-09-01 4 M 0 58666 A 58683 D Class A Common Stock 2021-09-01 4 S 0 24014 17.1743 D 34669 D Class A Common Stock 15896 I By Spouse Restricted Stock Units 2021-08-31 4 A 0 112251 0.00 A Class A Common Stock 112251 112251 D Stock Option 15.59 2021-08-31 4 A 0 263210 0.00 A 2031-08-31 Class A Common Stock 263210 263210 D Restricted Stock Units 2021-09-01 4 M 0 58666 0.00 A Class A Common Stock 58666 0 D Each restricted stock unit represents a contingent right to receive one share of Class A common stock. The sale was effected pursuant to a Rule 10b5-1 instruction letter to satisfy the Reporting Person's tax withholding obligation upon the settlement of previously granted equity awards. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.02 to $17.37, 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. The restricted stock units will vest over a four-year period in 16 equal quarterly installments beginning on December 1, 2021. The options will vest over a four-year period in 16 equal quarterly installments beginning on December 1, 2021. The restricted stock units were granted in January 2021, are fully vested and settled on September 1, 2021. /s/ Allein Sabel, Attorney-in-Fact 2021-09-02