X0609 4 2026-08-20 0 0001315098 Roblox Corp RBLX 0001239764 KILAR JASON false C/O ROBLOX CORPORATION 3150 S. DELAWARE ST. SAN MATEO CA 94403 1 0 0 0 0 Class A Common Stock 2026-08-20 4 J 0 1296 0 D 18927 D Phantom Stock 2026-08-20 4 J 0 1296 0 A Class A Common Stock 1296 1296 D In connection with the vesting on August 20, 2026, of Restricted Stock Units ("RSUs") previously granted to the Reporting Person, the Reporting Person's receipt of 1,296 shares of Class A Common Stock was deferred, resulting in the Reporting Person's receipt instead of 1,296 shares of phantom stock pursuant to the Issuer's deferred compensation plan. The Reporting Person is therefore reporting the disposition of 1,296 shares of Class A Common Stock in exchange for an equal number of shares of phantom stock. A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock. 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/ Mark Reinstra Attorney-in-Fact for Jason Kilar 2026-08-24