X0306 4 2021-06-28 0 0001315098 Roblox Corp RBLX 0001835042 Sturman Daniel C/O ROBLOX CORPORATION 970 PARK PLACE SAN MATEO CA 94403 0 1 0 0 Chief Technology Officer Class A Common Stock 2021-06-28 4 M 0 8334 3.405 A 67070 D Class A Common Stock 2021-06-28 4 S 0 8334 90.00 D 58736 D Class A Common Stock 151983 I See Footnotes Class A Common Stock 151982 I See Footnotes Stock Option (Right to Buy) 3.405 2021-06-28 4 M 0 8334 0.00 D 2030-01-29 Class A Common Stock 8334 1143649 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 Plan adopted by the Reporting Person on March 22, 2021. These shares are held directly by Mo Red LLC, a Delaware limited liability for which the Reporting Person serves as manager. The Reporting Person may be deemed to have beneficial ownership over the securities held by the limited liability company. These shares are held directly by Lucy Simon LLC, a Delaware limited liability company for which the spouse of the Reporting Person serves as manager. The spouse of the Reporting Person may be deemed to have beneficial ownership of the securities held by the limited liability company. 1/48th of the shares subject to the option vested on February 17,2020, and 1/48th of the shares subject to the option vest each month thereafter, subject to the Reporting Person continuing as a service provider through each such date. /s/ Mark Reinstra Attorney-in-Fact for Daniel Sturman 2021-06-30