X0508 4 2026-02-20 0 0001315098 Roblox Corp RBLX 0001834990 Baszucki Gregory C/O ROBLOX CORPORATION 3150 S. DELAWARE ST. SAN MATEO CA 94403 1 0 0 0 0 Class A Common Stock 2026-02-20 4 J 0 1125 0 D 10346 D Class A Common Stock 8994496 I See Footnotes Class A Common Stock 869250 I See Footnotes Class A Common Stock 869250 I See Footnotes Class A Common Stock 1319500 I See Footnotes Phantom Stock 2026-02-20 4 J 0 1125 0 A Class A Common Stock 1125 3375 D In connection with the vesting on February 20, 2026, of Restricted Stock Units ("RSUs") previously granted to the Reporting Person, the Reporting Person's receipt of 1,125 shares of Class A Common Stock was deferred, resulting in the Reporting Person's receipt instead of 1,125 shares of phantom stock pursuant to the Issuer's deferred compensation plan. The Reporting Person is therefore reporting the disposition of 1,125 shares of Class A Common Stock in exchange for an equal number of shares of phantom stock. A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock. These shares are held of record by the Greg and Christina Baszucki Living Trust dtd 08/18/2006 of which the Reporting Person serves as trustee. The Reporting Person may be deemed to have beneficial ownership of the shares held by the Trust. These shares are held directly by the Morningstar Dynasty Trust dtd 11/13/2020 of which Bessemer Trust Company of DE, N.A. serves as trustee. The Reporting Person may be deemed to have beneficial ownership of the shares held by the Trust. These shares are held directly by the Crossbow Dynasty Trust dtd 11/13/2020 of which Bessemer Trust Company of DE, N.A. serves as trustee. The Reporting Person may be deemed to have beneficial ownership of the shares held by the Trust. These shares are held directly under a Roth IRA account for the Reporting Person (formerly known as the PENSCO Trust Co). Each share of phantom stock represents a right to receive one share of Class A Common Stock. The phantom stock becomes payable in one lump sum payment upon separation from service. /s/ Adele Freedman Attorney-in-Fact for Gregory Baszucki 2026-02-24