X0508 4 2026-03-02 0 0001568651 Oscar Health, Inc. OSCR 0001352552 Bertolini Mark T 75 VARICK STREET, 5TH FLOOR NEW YORK NY 10013 1 1 0 0 Chief Executive Officer 0 Class A Common Stock 2026-03-02 4 A 0 1596877 0 A 4463543 D The shares represent restricted stock units, which will vest in three equal annual installments beginning on March 2, 2027, subject to the Reporting Person's continued employment or service as the Chief Executive Officer or as a member of the Board of Directors through the applicable vesting date. Includes shares to be issued in connection with the vesting of one or more restricted stock units. /s/ Melissa Curtin, Attorney-in-Fact 2026-03-04