X0306 4 2021-03-11 0 0001315098 Roblox Corp RBLX 0001766317 Altos Ventures IV Liquidity Fund, L.P. 2882 SAND HILL ROAD SUITE 100 MENLO PARK CA 94025 0 0 1 0 0001848631 Altos Hybrid 2 GP, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK CA 94025 0 0 1 0 0001848632 Altos Hybrid 2 P-FIO, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK CA 94025 0 0 1 0 0001848637 Altos Hybrid 2 V, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK CA 94025 0 0 1 0 0001848640 Altos Hybrid 3 B, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK CA 94025 0 0 1 0 0001848630 Altos Hybrid 3 GP, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK CA 94025 0 0 1 0 0001848639 Altos Hybrid 3 M, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK CA 94025 0 0 1 0 0001848638 Altos Hybrid 3 W, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK CA 94025 0 0 1 0 0001848629 Altos Hybrid 4 GP, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK CA 94025 0 0 1 0 0001848642 Altos Hybrid 4 GS, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK CA 94025 0 0 1 0 Class A Common Stock 2021-03-11 4 J 0 466666 0.00 D 0 I See Footnotes Class A Common Stock 2021-03-11 4 J 0 344444 0.00 D 0 I See Footnotes Class A Common Stock 2021-03-11 4 J 0 111111 0.00 D 0 I See Footnotes Class A Common Stock 2021-03-11 4 J 0 222222 0.00 D 0 I See Footnotes Class A Common Stock 2021-03-11 4 J 0 222222 0.00 D 0 I See Footnotes Class A Common Stock 2021-03-11 4 J 0 111111 0.00 D 0 I See Footnotes Class A Common Stock 2021-03-11 4 J 0 111111 0.00 D 0 I See Footnotes Class A Common Stock 2021-03-11 4 J 0 22222 0.00 D 0 I See Footnotes Class A Common Stock 2021-03-11 4 J 0 55555 0.00 D 0 I See Footnotes Class A Common Stock 475582 I See Footnotes Class A Common Stock 111112 I See Footnotes Class A Common Stock 24553106 I See Footnotes Class A Common Stock 3416653 I See Footnotes Class A Common Stock 17026377 I See Footnotes Class A Common Stock 36507533 I See Footnotes Class A Common Stock 786183 I See Footnotes Class A Common Stock 20340126 I See Footnotes Class A Common Stock 389022 I See Footnotes Class A Common Stock 389023 I See Footnotes Class A Common Stock 7236 I See Footnotes Class A Common Stock 7236 I See Footnotes Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 4 GS, LLC to its members. These shares are held directly by Altos Hybrid 4 GS, LLC The general partner of Altos Hybrid 2, L.P. is Altos Hybrid 2GP, LLC; the general partner of Altos Hybrid 4, L.P. is Altos Hybrid 4 GP, LLC; and the general partner of Altos Ventures IV Liquidity Fund, L.P., Altos Ventures IV Reserve Fund, L.P. and Altos Ventures IV, L.P. is Altos Management Partners IV, LLC (collectively, the General Partners). The manager of Altos Roblox SPV 1, LLC and Altos Roblox SPV 2, LLC is Altos Roblox Management Partners IV, LLC; the manager of Altos Roblox SPV 2020, LLC is Altos Roblox 2020 Management Partners, LLC; the manager of Altos Hybrid 4 GS, LLC and Altos Hybrid HG, LLC is Altos Hybrid 4 GP, LLC; the manager of Altos Hybrid 2 V, LLC and Altos Hybrid 2 P-FIO, LLC is Altos Hybrid 2 GP, LLC; the manager of Altos Hybrid 3 B, LLC, Altos Hybrid 3M, LLC, and Altos Hybrid 3W, LLC is Altos Hybrid 3 GP, LLC; the manager of Altos Hybrid UP, LLC and Altos Hybrid CC, LLC is Altos Hybrid 4 GP, LLC (collectively, the Managers). (Continued from footnote 3). The General Partners and the Managers disclaim beneficial ownership of the shares reported herein except to the extent of their respective pecuniary interests therein, if any. 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 Hondong Nam disclaim beneficial ownership of the shares held by the Altos Funds except to the extent of their respective pecuriary interest therein, if any. Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid HG, LLC to its members. These shares are held directly by Altos Hybrid HG, LLC Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 2 V, LLC to its members. These shares are held directly by Altos Hybrid 2 V, LLC Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 2 P-FIO, LLC to its members. These shares are held directly by Altos Hybrid 2 P-FIO, LLC Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 B, LLC to its members. These shares are held directly by Altos Hybrid 3 B, LLC Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid UP, LLC to its members. These shares are held directly by Altos Hybrid UP, LLC Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 W, LLC to its members. These shares are held directly by Altos Hybrid 3 W, LLC Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 M, LLC to its members. These shares are held directly by Altos Hybrid 3 M, LLC Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid CC, LLC to its members. These shares are held directly by Altos Hybrid CC, LLC These shares are held directly by Altos Hybrid 2, L.P. These shares are held directly by Altos Hybrid 4, 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 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 Ventures IV, L.P. These shares are held directly by the The Kim Living Trust for which Han Kim serves as trustee. Mr. Kim disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein. These shares are held directly by the Nam-MacGill 2006 Family Trust for which Hodong Nam serves as trustee. Mr. Nam disclaims beneficial ownership of such shares except to the extent of his pecuniary interes therein. These shares are held directly by the Han Family Investments, LLC - Sub Fund No. 1 for which Han Kim serves as Managing Member. Mr. Kim disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein. Anthony P. Lee, Managing Director of Altos Management Partners IV, LLC, the General Partner of Altos Ventures IV Liquidity Fund, L.P. 2021-03-15 Anthony P. Lee, Managing Director of Altos Hybrid 2 GP, LLC 2021-03-12 Anthony P Lee, Managing Director of Altos Hybrid 2 GP, LLC, the Manager of Altos Hybrid 2 P-FIO, LLC 2021-03-12 Anthony P. Lee, Managing Director of Altos Hybrid 2 GP, LLC, the Manager of Altos Hybrid 2 V, LLC 2021-03-12 Anthony P. Lee, Managing Member of Altos Hybrid 3 GP, LLC, the Manager of Altos Hybrid 3 B, LLC 2021-03-12 Anthony P. Lee, Managing Director of Altos Hybrid 3 GP, LLC 2021-03-12 Anthony P. Lee, Managing Member of Altos Hybrid 3 GP, LLC, the Manager of Altos Hybrid 3 M, LLC 2021-03-12 Anthony P. Lee, Managing Director of Altos Hybrid 3 GP, LLC, the Manager of Altos Hybrid 3 W, LLC 2021-03-12 Anthony P. Lee, Managing Director of Altos Hybrid 4 GP, LLC 2021-03-12 Anthony P. Lee, Managing Director of Altos Hybrid 4 GP, LLC, the Manager of Altos Hybrid 4 GS, LLC 2021-03-12