X0306 4 2021-03-10 0 0001315098 Roblox Corp RBLX 0001835037 Reinstra Mark C/O ROBLOX CORPORATION 970 PARK PLACE SAN MATEO CA 94403 0 1 0 0 Gen. Counsel & Secretary Class A Common Stock 2021-03-10 4 M 0 150000 3.405 A 208736 D Class A Common Stock 2021-03-10 4 S 0 125000 64.50 D 83736 D Class A Common Stock 2021-03-10 4 S 0 25000 68.00 D 58736 D Class A Common Stock 202410 I See Footnotes Class A Common Stock 40000 I See Footnotes Class A Common Stock 40000 I See Footnotes Stock Option (Right to Buy) 3.405 2021-03-10 4 M 0 150000 0.00 D 2030-12-09 Class A Common Stock 150000 591264 D These shares are held directly by the San Domenico Trust dated August 12, 1999 for which the reporting person serves as trustee. The reporting person may be deemed to have beneficial ownership over the securities held by the trust. These shares are held directly by the Mark L. Reinstra Annuity Trust dated October 7, 2020 for which the reporting person serves as trustee. The reporting person may be deemed to have beneficial ownership of the securities held by the Annuity Trust. These shares are held directly by the Susan P. Reinstra Annuity Trust dated October 7, 2020 for the reporting person serves as trustee. The spouse of the reporting person may be deemed to have beneficial ownership of the securities held by the Annuity Trust. 1/4th of the shares subject to the option became vested and exercisable on December 4, 2020 and 1/48th of the shares subject to the option shall continue to vest each month thereafter, provided that the reporting person is a service provider to the issuer as of each vest date. /s/Mark Reinstra 2021-03-12