Thrive Partners II GP, LLC sold OSCR

Footnotes

On September 18, 2026, (i) Thrive Capital Partners II, L.P. ("Thrive II") transferred 1,307,831 and 15,758 shares of Class B Common Stock to Thrive Capital Partners VII Growth, L.P. ("Thrive VII Growth") and Claremount VII Associates, L.P. ("Claremount VII"), respectively, in exchange for 1,307,831 and 15,758 shares of Class A Common Stock held by Thrive VII Growth and Claremount VII, respectively; (ii) Thrive Capital Partners III, L.P. ("Thrive III") transferred 4,798,003 and 57,807 shares of Class B Common Stock to Thrive VII Growth and Claremount VII, respectively, in exchange for 4,798,003 and 57,807 shares of Class A Common Stock held by Thrive VII Growth and Claremount VII, respectively; (iii) Claremount TW, L.P. ("Claremount TW") transferred 162,263 and 1,955 shares of Class B Common Stock to Thrive VII Growth and Claremount VII, respectively, in exchange for 162,263 and 1,955 shares of Class A Common Stock held by Thrive VII Growth and Claremount VII, respectively.; Thrive Partners II GP, LLC is the general partner of Thrive II; Thrive Partners III GP, LLC is the general partner of each of Thrive III and Claremount TW; Thrive Partners V GP, LLC is the general partner of each of Thrive Capital Partners V, L.P. ("Thrive V") and Claremount V Associates, L.P. ("Claremount V"); Thrive Partners VI GP, LLC is the general partner of each of Thrive Capital Partners VI Growth, L.P. ("Thrive VI Growth") and Claremount VI Associates, L.P. ("Claremount VI"); Thrive Partners VII Growth GP, LLC is the general partner of Thrive VII Growth; and Thrive Partners VII GP, LLC is the general partner of Claremount VII (together with Thrive II, Thrive III, Claremount TW, Thrive V, Claremount V, Thrive VI Growth, Claremount VI, Thrive VII Growth, the "Thrive Capital Funds").; (continued from footnote 2) Thrive Partners II GP, LLC, Thrive Partners III GP, LLC, Thrive Partners V GP, LLC, Thrive Partners VI GP, LLC, Thrive Partners VII Growth GP, LLC and Thrive Partners VII GP, LLC are collectively referred to as the "Thrive General Partners." Joshua Kushner is the sole managing member of each of the Thrive General Partners and, in his capacity as managing member, has voting and investment power over the shares held by each of the Thrive Capital Funds. Each of the foregoing entities and Mr. Kushner disclaims beneficial ownership of the shares held of record by the Thrive Capital Funds, except to the extent of its or his pecuniary interest therein.