X0306 4 2021-03-15 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 2021-03-15 4 M 0 40000 3.405 A 98736 D Class A Common Stock 2021-03-15 4 S 0 40000 70.5954 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 2021-03-15 4 M 0 40000 0.00 D 2030-12-09 Class A Common Stock 40000 551264 D The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $70.50 to $70.675, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. 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 vested on December 4, 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 2021-03-16