X0306 4 2023-02-24 0 0001315098 Roblox Corp RBLX 0001833040 Altos Ventures IV, L.P. C/O ROBLOX CORPORATION 970 PARK PLACE SAN MATEO CA 94403 0 0 1 0 0001766317 Altos Ventures IV Liquidity Fund, L.P. C/O ROBLOX CORPORATION 970 PARK PLACE SAN MATEO CA 94403 0 0 1 0 0001766268 Altos Ventures IV Reserve Fund, L.P. C/O ROBLOX CORPORATION 970 PARK PLACE SAN MATEO CA 94403 0 0 1 0 0001747201 Altos Roblox SPV 1, LLC C/O ROBLOX CORPORATION 970 PARK PLACE SAN MATEO CA 94403 0 0 1 0 0001747200 Altos Roblox SPV 2, LLC C/O ROBLOX CORPORATION 970 PARK PLACE SAN MATEO CA 94403 0 0 1 0 0001803466 Altos Roblox SPV 2020, LLC C/O ROBLOX CORPORATION 970 PARK PLACE SAN MATEO CA 94403 0 0 1 0 0001694364 Altos Hybrid 2, L.P. C/O ROBLOX CORPORATION 970 PARK PLACE SAN MATEO CA 94403 0 0 1 0 0001826414 Altos Hybrid 4, L.P. C/O ROBLOX CORPORATION 970 PARK PLACE SAN MATEO CA 94403 0 0 1 0 Class A Common Stock 2023-02-24 4 J 0 673728 0.00 D 13951314 I See Footnotes Class A Common Stock 2023-02-24 4 J 0 559156 0.00 D 25162039 I See Footnotes Class A Common Stock 2023-02-24 4 J 0 3954 0.00 D 545770 I See Footnotes Class A Common Stock 2023-02-24 4 J 0 186157 0.00 D 16754141 I See Footnotes Class A Common Stock 2023-02-24 4 J 0 150069 0.00 D 2343508 I See Footnotes Class A Common Stock 2023-02-24 4 J 0 274177 0.00 D 11668468 I See Footnotes Class A Common Stock 2023-02-24 4 J 0 466 0.00 D 279913 I See Footnotes Represents a pro-rata in kind distribution of the Issuer's Class A Common Stock by the Fund to its general partners. These shares are held directly by Altos Ventures IV, L.P. The general partner of Altos Hybrid 2, L.P. is Altos Hybrid 2 GP, LLC; the general partner of Altos Hybrid 4, L.P. is Altos Hybrid 4 GP, LLC; the general partner of Altos Ventures IV, L.P. is Altos Management Partners IV, LLC; the general partner of Altos Ventures IV Liquidity Fund, L.P. and Altos Ventures IV Reserve Fund, L.P. is Altos Management IV LR GP, LLC; the general partner of Altos Roblox SPV 1, LLC and Altos Roblox SPV 2, LLC is Altos Roblox Management Partners IV, LLC; and the general partner of Altos Roblox SPV 2020, LLC is Altos Roblox 2020 Management Partners, LLC (collectively, the General Partners). The Managing Directors or Managing Members of the General Partners and the Managers of the Altos Funds are Anthony P. Lee, Han Kim and Hodong Nam who exercise investment and voting control over the shares held by the Altos Funds. Anthony P. Lee, a director of the Issuer, files separate Section 16 reports. Han Kim and Hodong Nam disclaim beneficial ownership of the shares held by the Altos Funds except to the extent of their respective pecuniary interest therein, if any. These shares are held directly by Altos Ventures IV Liquidity Fund, L.P. These shares are held directly by Altos Ventures IV Reserve Fund, L.P. These shares are held directly by Altos Roblox SPV 1, LLC. These shares are held directly by Altos Roblox SPV 2, LLC. These shares are held directly by Altos Roblox SPV 2020, LLC. These shares are held directly by Altos Hybrid 2, L.P. This Form 4 is the first of two Forms 4 filed by the Reporting Persons related to the same events. The Form 4 has been split into two filings in order to include all Reporting Persons. /s/ Anthony P. Lee, Managing Director of Altos Management Partners IV,LLC, general partner of Altos Ventures IV, L.P. 2023-02-28 /s/ Anthony P. Lee, Managing Director of Altos Management Partners IV LR GP, LLC, general partner of Altos Ventures IV Liquidity Fund, L.P. 2023-02-28 /s/ Anthony P. Lee, Managing Director of Altos Management Partners IV LR GP, LLC, general partner of Altos Ventures IV Reserve Fund, L.P. 2023-02-28 /s/ Anthony P. Lee, Managing Director Altos Hybrid 2, GP, LLC, general partner of Altos Hybrid 2, L.P. 2023-02-28 /s/ Anthony P. Lee, Managing Director of Altos Hybrid 4, GP, LLC, general partner of Altos Hybrid 4, L.P. 2023-02-28 /s/ Anthony P. Lee, Managing Member of Altos Roblox 2020 Management Partners LLC, manager of Altos Roblox SPV 2020, LLC 2023-02-28 /s/ Anthony P. Lee, Managing Director of Altos Hybrid 2, GP, LLC general partner of Altos Hybrid 2, L.P. 2023-02-28 /s/ Anthony P. Lee, Managing Director of Altos Hybrid 4, GP, LLC, general partner of Altos Hybrid 4, L.P. 2023-02-28