144 0001834991 XXXXXXXX LIVE 0001315098 Roblox Corporation 001-39763 3150 South Delaware Street San Mateo CA 94403 8888582569 2020 DAVID BASZUCKI GIFT TRUST DTD 04/03/2020 Director Officer 10% Stockholder Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

17320 1213785.60 607546629 01/30/2025 NYSE Common 04/06/2004 Founders Shares Issuer N 17320 04/06/2004 N/A N DAVID BRENT BASZUCKI

3150 South Delaware Street San Mateo CA 94403

Common 12/06/2024 33333 1973223.60 10b5-1 Sales for THE BASZUCKI FAMILY FOUNDATION

3150 South Delaware Street San Mateo CA 94403

Common 12/05/2024 66667 3820539.10 10b5-1 Sales for 2020 DAVID BASZUCKI GIFT TRUST U/A DTD 04/03/2020

3150 South Delaware Street San Mateo CA 94403

Common 12/05/2024 41667 2387844.10 10b5-1 Sales for 2020 JAN BASZUCKI GIFT TRUST DTD 04/03/2020

3150 South Delaware Street San Mateo CA 94403

Common 12/05/2024 41667 2387844.10 10b5-1 Sales for DAVID BRENT BASZUCKI

3150 South Delaware Street San Mateo CA 94403

Common 12/05/2024 333334 19102638.21 DAVID BRENT BASZUCKI

3150 South Delaware Street San Mateo CA 94403

Common 11/19/2024 16666 870068.53 10b5-1 Sales for THE BASZUCKI FAMILY FOUNDATION

3150 South Delaware Street San Mateo CA 94403

Common 11/18/2024 33333 1690249.76 10b5-1 Sales for 2020 DAVID BASZUCKI GIFT TRUST U/A DTD 04/03/2020

3150 South Delaware Street San Mateo CA 94403

Common 11/18/2024 20833 1056399.76 10b5-1 Sales for 2020 JAN BASZUCKI GIFT TRUST DTD 04/03/2020

3150 South Delaware Street San Mateo CA 94403

Common 11/18/2024 20833 1056399.76 10b5-1 Sales for DAVID BRENT BASZUCKI

3150 South Delaware Street San Mateo CA 94403

Common 11/18/2024 166666 8451299.53 01/30/2025 11/29/2023 /s/ Julia E. Coombs, Sr. V.P. for Bessemer Tr. Co. of DE, N.A. as TTEE