X0306 4 2021-06-01 0 0001315098 Roblox Corp RBLX 0001834991 Baszucki David C/O ROBLOX CORPORATION 970 PARK PLACE SAN MATEO CA 94403 1 1 1 0 President & CEO Class A Common Stock 2021-06-01 4 S 0 16644 94.013 D 1983356 I See Footnotes Class A Common Stock 2021-06-01 4 S 0 44820 94.8568 D 1938536 I See Footnotes Class A Common Stock 2021-06-01 4 S 0 135998 95.9914 D 1802538 I See Footnotes Class A Common Stock 2021-06-01 4 S 0 164496 96.8643 D 1638042 I See Footnotes Class A Common Stock 2021-06-01 4 S 0 13042 97.5916 D 1625000 I See Footnotes All of the sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 22, 2021. The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $93.33 to $94.32, 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 Freedom Revocable Trust dated February 28, 2017 as amended, and for which the Reporting Person serves as trustee. The Reporting Person may be deemed to have beneficial ownership of the securities held by the Freedom Trust. The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $94.35 to $95.34, 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. The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $95.35 to $96.34, 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. The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $96.35 to $97.34, 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. The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $97.35 to $97.92, 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. /s/ Mark Reinstra Attorney-in-Fact for David Baszucki 2021-06-03