X0609 4 2026-05-27 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 2026-05-27 4 J 0 1126 0 D 15038 D Class A Common Stock 2026-05-28 4 A 0 5185 0 A 20223 D Phantom Stock 2026-05-27 4 J 0 1126 0 A Class A Common Stock 1126 4501 D In connection with the vesting on May 27, 2026, of Restricted Stock Units ("RSUs") previously granted to the Reporting Person, the Reporting Person's receipt of 1,126 shares of Class A Common Stock was deferred, resulting in the Reporting Person's receipt instead of 1,126 shares of phantom stock pursuant to the Issuer's deferred compensation plan. The Reporting Person is therefore reporting the disposition of 1,126 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. 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. 1/4th of the RSUs shall vest on each of August 20, 2026, November 20, 2026 and February 20, 2027, and the remaining 1/4th of the RSUs shall vest on the earlier of (i) the day before the annual meeting of stockholders held in 2027 or (ii) May 28, 2027, subject to the Reporting Person continuing as a service provider through each vest date. 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 2026-05-29