X0609 4 2026-08-20 0 0001315098 Roblox Corp RBLX 0001834991 Baszucki David false C/O ROBLOX CORPORATION 3150 S. DELAWARE ST. SAN MATEO CA 94403 1 1 1 0 President & CEO 0 Class A Common Stock 2026-08-20 4 S 0 38208 37.7776 D 814006 D Class A Common Stock 2026-08-20 4 S 0 14360 38.4396 D 799646 D Class A Common Stock 3493765 I See Footnote Represents the number of shares sold to cover statutory tax withholding obligations arising in connection with the vesting of certain Restricted Stock Units ("RSUs"). These shares were sold pursuant to a mandatory "sell-to-cover" arrangement under the Issuer's equity incentive plan to satisfy tax withholding obligations and do not represent a discretionary transaction by the Reporting Person. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $37.21 to $38.20, 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. 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. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $38.23 to $38.90, 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. /s/ Mark Reinstra Attorney-in-Fact for David Baszucki 2026-08-24