RBLX

SEC source: 0001209191-21-020317 · doc4.xml · nonDerivative · entry 12

Donato Craig · CIK 0001834992 · Chief Business Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,410,034

SEC source: 0001209191-21-020614 · doc4.xml · nonDerivative · entry 9

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 4, L.P. · CIK 0001826414 · 10% owner

Altos Hybrid CC, LLC · CIK 0001828887 · 10% owner

Altos Hybrid HG, LLC · CIK 0001848641 · 10% owner

Altos Hybrid UP, LLC · CIK 0001849388 · 10% owner

Altos Management Partners IV, LLC · CIK 0001848634 · 10% owner

Altos Roblox 2020 Management Partners, LLC · CIK 0001848636 · 10% owner

Altos Roblox Management Partners, LLC · CIK 0001848635 · 10% owner

Altos Roblox SPV 1, LLC · CIK 0001747201 · 10% owner

Altos Roblox SPV 2, LLC · CIK 0001747200 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F20 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid CC, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F21 · ownership.nature: These shares are held directly by Altos Hybrid CC, LLC

SEC source: 0001209191-21-020614 · doc4.xml · nonDerivative · entry 8

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 4, L.P. · CIK 0001826414 · 10% owner

Altos Hybrid CC, LLC · CIK 0001828887 · 10% owner

Altos Hybrid HG, LLC · CIK 0001848641 · 10% owner

Altos Hybrid UP, LLC · CIK 0001849388 · 10% owner

Altos Management Partners IV, LLC · CIK 0001848634 · 10% owner

Altos Roblox 2020 Management Partners, LLC · CIK 0001848636 · 10% owner

Altos Roblox Management Partners, LLC · CIK 0001848635 · 10% owner

Altos Roblox SPV 1, LLC · CIK 0001747201 · 10% owner

Altos Roblox SPV 2, LLC · CIK 0001747200 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F18 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 M, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F19 · ownership.nature: These shares are held directly by Altos Hybrid 3 M, LLC

SEC source: 0001209191-21-020614 · doc4.xml · nonDerivative · entry 7

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 4, L.P. · CIK 0001826414 · 10% owner

Altos Hybrid CC, LLC · CIK 0001828887 · 10% owner

Altos Hybrid HG, LLC · CIK 0001848641 · 10% owner

Altos Hybrid UP, LLC · CIK 0001849388 · 10% owner

Altos Management Partners IV, LLC · CIK 0001848634 · 10% owner

Altos Roblox 2020 Management Partners, LLC · CIK 0001848636 · 10% owner

Altos Roblox Management Partners, LLC · CIK 0001848635 · 10% owner

Altos Roblox SPV 1, LLC · CIK 0001747201 · 10% owner

Altos Roblox SPV 2, LLC · CIK 0001747200 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F16 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 W, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F17 · ownership.nature: These shares are held directly by Altos Hybrid 3 W, LLC

SEC source: 0001209191-21-020614 · doc4.xml · nonDerivative · entry 6

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 4, L.P. · CIK 0001826414 · 10% owner

Altos Hybrid CC, LLC · CIK 0001828887 · 10% owner

Altos Hybrid HG, LLC · CIK 0001848641 · 10% owner

Altos Hybrid UP, LLC · CIK 0001849388 · 10% owner

Altos Management Partners IV, LLC · CIK 0001848634 · 10% owner

Altos Roblox 2020 Management Partners, LLC · CIK 0001848636 · 10% owner

Altos Roblox Management Partners, LLC · CIK 0001848635 · 10% owner

Altos Roblox SPV 1, LLC · CIK 0001747201 · 10% owner

Altos Roblox SPV 2, LLC · CIK 0001747200 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F14 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid UP, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F15 · ownership.nature: These shares are held directly by Altos Hybrid UP, LLC

SEC source: 0001209191-21-020614 · doc4.xml · nonDerivative · entry 5

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 4, L.P. · CIK 0001826414 · 10% owner

Altos Hybrid CC, LLC · CIK 0001828887 · 10% owner

Altos Hybrid HG, LLC · CIK 0001848641 · 10% owner

Altos Hybrid UP, LLC · CIK 0001849388 · 10% owner

Altos Management Partners IV, LLC · CIK 0001848634 · 10% owner

Altos Roblox 2020 Management Partners, LLC · CIK 0001848636 · 10% owner

Altos Roblox Management Partners, LLC · CIK 0001848635 · 10% owner

Altos Roblox SPV 1, LLC · CIK 0001747201 · 10% owner

Altos Roblox SPV 2, LLC · CIK 0001747200 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F12 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 B, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F13 · ownership.nature: These shares are held directly by Altos Hybrid 3 B, LLC

SEC source: 0001209191-21-020614 · doc4.xml · nonDerivative · entry 4

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 4, L.P. · CIK 0001826414 · 10% owner

Altos Hybrid CC, LLC · CIK 0001828887 · 10% owner

Altos Hybrid HG, LLC · CIK 0001848641 · 10% owner

Altos Hybrid UP, LLC · CIK 0001849388 · 10% owner

Altos Management Partners IV, LLC · CIK 0001848634 · 10% owner

Altos Roblox 2020 Management Partners, LLC · CIK 0001848636 · 10% owner

Altos Roblox Management Partners, LLC · CIK 0001848635 · 10% owner

Altos Roblox SPV 1, LLC · CIK 0001747201 · 10% owner

Altos Roblox SPV 2, LLC · CIK 0001747200 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F10 · kind: 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.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F11 · ownership.nature: These shares are held directly by Altos Hybrid 2 P-FIO, LLC

SEC source: 0001209191-21-020614 · doc4.xml · nonDerivative · entry 3

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 4, L.P. · CIK 0001826414 · 10% owner

Altos Hybrid CC, LLC · CIK 0001828887 · 10% owner

Altos Hybrid HG, LLC · CIK 0001848641 · 10% owner

Altos Hybrid UP, LLC · CIK 0001849388 · 10% owner

Altos Management Partners IV, LLC · CIK 0001848634 · 10% owner

Altos Roblox 2020 Management Partners, LLC · CIK 0001848636 · 10% owner

Altos Roblox Management Partners, LLC · CIK 0001848635 · 10% owner

Altos Roblox SPV 1, LLC · CIK 0001747201 · 10% owner

Altos Roblox SPV 2, LLC · CIK 0001747200 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F8 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 2 V, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F9 · ownership.nature: These shares are held directly by Altos Hybrid 2 V, LLC

SEC source: 0001209191-21-020614 · doc4.xml · nonDerivative · entry 2

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 4, L.P. · CIK 0001826414 · 10% owner

Altos Hybrid CC, LLC · CIK 0001828887 · 10% owner

Altos Hybrid HG, LLC · CIK 0001848641 · 10% owner

Altos Hybrid UP, LLC · CIK 0001849388 · 10% owner

Altos Management Partners IV, LLC · CIK 0001848634 · 10% owner

Altos Roblox 2020 Management Partners, LLC · CIK 0001848636 · 10% owner

Altos Roblox Management Partners, LLC · CIK 0001848635 · 10% owner

Altos Roblox SPV 1, LLC · CIK 0001747201 · 10% owner

Altos Roblox SPV 2, LLC · CIK 0001747200 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F6 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid HG, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F7 · ownership.nature: These shares are held directly by Altos Hybrid HG, LLC

SEC source: 0001209191-21-020614 · doc4.xml · nonDerivative · entry 1

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 4, L.P. · CIK 0001826414 · 10% owner

Altos Hybrid CC, LLC · CIK 0001828887 · 10% owner

Altos Hybrid HG, LLC · CIK 0001848641 · 10% owner

Altos Hybrid UP, LLC · CIK 0001849388 · 10% owner

Altos Management Partners IV, LLC · CIK 0001848634 · 10% owner

Altos Roblox 2020 Management Partners, LLC · CIK 0001848636 · 10% owner

Altos Roblox Management Partners, LLC · CIK 0001848635 · 10% owner

Altos Roblox SPV 1, LLC · CIK 0001747201 · 10% owner

Altos Roblox SPV 2, LLC · CIK 0001747200 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 4 GS, LLC to its members.

F2 · ownership.nature: These shares are held directly by Altos Hybrid 4 GS, LLC

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

SEC source: 0001209191-21-020618 · doc4.xml · nonDerivative · entry 9

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Roblox SPV 2020, LLC · CIK 0001803466 · 10% owner

Altos Ventures IV Reserve Fund, L.P. · CIK 0001766268 · 10% owner

Altos Ventures IV, L.P. · CIK 0001833040 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

Nam Hodong · CIK 0001836648 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F20 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid CC, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F21 · ownership.nature: These shares are held directly by Altos Hybrid CC, LLC

SEC source: 0001209191-21-020618 · doc4.xml · nonDerivative · entry 8

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Roblox SPV 2020, LLC · CIK 0001803466 · 10% owner

Altos Ventures IV Reserve Fund, L.P. · CIK 0001766268 · 10% owner

Altos Ventures IV, L.P. · CIK 0001833040 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

Nam Hodong · CIK 0001836648 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F18 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 M, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F19 · ownership.nature: These shares are held directly by Altos Hybrid 3 M, LLC

SEC source: 0001209191-21-020618 · doc4.xml · nonDerivative · entry 7

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Roblox SPV 2020, LLC · CIK 0001803466 · 10% owner

Altos Ventures IV Reserve Fund, L.P. · CIK 0001766268 · 10% owner

Altos Ventures IV, L.P. · CIK 0001833040 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

Nam Hodong · CIK 0001836648 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F16 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 W, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F17 · ownership.nature: These shares are held directly by Altos Hybrid 3 W, LLC

SEC source: 0001209191-21-020618 · doc4.xml · nonDerivative · entry 6

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Roblox SPV 2020, LLC · CIK 0001803466 · 10% owner

Altos Ventures IV Reserve Fund, L.P. · CIK 0001766268 · 10% owner

Altos Ventures IV, L.P. · CIK 0001833040 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

Nam Hodong · CIK 0001836648 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F14 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid UP, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F15 · ownership.nature: These shares are held directly by Altos Hybrid UP, LLC

SEC source: 0001209191-21-020618 · doc4.xml · nonDerivative · entry 5

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Roblox SPV 2020, LLC · CIK 0001803466 · 10% owner

Altos Ventures IV Reserve Fund, L.P. · CIK 0001766268 · 10% owner

Altos Ventures IV, L.P. · CIK 0001833040 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

Nam Hodong · CIK 0001836648 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F12 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 B, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F13 · ownership.nature: These shares are held directly by Altos Hybrid 3 B, LLC

SEC source: 0001209191-21-020618 · doc4.xml · nonDerivative · entry 4

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Roblox SPV 2020, LLC · CIK 0001803466 · 10% owner

Altos Ventures IV Reserve Fund, L.P. · CIK 0001766268 · 10% owner

Altos Ventures IV, L.P. · CIK 0001833040 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

Nam Hodong · CIK 0001836648 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F10 · kind: 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.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F11 · ownership.nature: These shares are held directly by Altos Hybrid 2 P-FIO, LLC

SEC source: 0001209191-21-020618 · doc4.xml · nonDerivative · entry 3

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Roblox SPV 2020, LLC · CIK 0001803466 · 10% owner

Altos Ventures IV Reserve Fund, L.P. · CIK 0001766268 · 10% owner

Altos Ventures IV, L.P. · CIK 0001833040 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

Nam Hodong · CIK 0001836648 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F8 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 2 V, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F9 · ownership.nature: These shares are held directly by Altos Hybrid 2 V, LLC

SEC source: 0001209191-21-020618 · doc4.xml · nonDerivative · entry 2

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Roblox SPV 2020, LLC · CIK 0001803466 · 10% owner

Altos Ventures IV Reserve Fund, L.P. · CIK 0001766268 · 10% owner

Altos Ventures IV, L.P. · CIK 0001833040 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

Nam Hodong · CIK 0001836648 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F6 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid HG, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F7 · ownership.nature: These shares are held directly by Altos Hybrid HG, LLC

SEC source: 0001209191-21-020618 · doc4.xml · nonDerivative · entry 1

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Roblox SPV 2020, LLC · CIK 0001803466 · 10% owner

Altos Ventures IV Reserve Fund, L.P. · CIK 0001766268 · 10% owner

Altos Ventures IV, L.P. · CIK 0001833040 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

Nam Hodong · CIK 0001836648 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 4 GS, LLC to its members.

F2 · ownership.nature: These shares are held directly by Altos Hybrid 4 GS, LLC

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

SEC source: 0001209191-21-020613 · doc4.xml · nonDerivative · entry 9

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 2 GP, LLC · CIK 0001848631 · 10% owner

Altos Hybrid 2 P-FIO, LLC · CIK 0001848632 · 10% owner

Altos Hybrid 2 V, LLC · CIK 0001848637 · 10% owner

Altos Hybrid 3 B, LLC · CIK 0001848640 · 10% owner

Altos Hybrid 3 GP, LLC · CIK 0001848630 · 10% owner

Altos Hybrid 3 M, LLC · CIK 0001848639 · 10% owner

Altos Hybrid 3 W, LLC · CIK 0001848638 · 10% owner

Altos Hybrid 4 GP, LLC · CIK 0001848629 · 10% owner

Altos Hybrid 4 GS, LLC · CIK 0001848642 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F20 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid CC, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F21 · ownership.nature: These shares are held directly by Altos Hybrid CC, LLC

SEC source: 0001209191-21-020613 · doc4.xml · nonDerivative · entry 8

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 2 GP, LLC · CIK 0001848631 · 10% owner

Altos Hybrid 2 P-FIO, LLC · CIK 0001848632 · 10% owner

Altos Hybrid 2 V, LLC · CIK 0001848637 · 10% owner

Altos Hybrid 3 B, LLC · CIK 0001848640 · 10% owner

Altos Hybrid 3 GP, LLC · CIK 0001848630 · 10% owner

Altos Hybrid 3 M, LLC · CIK 0001848639 · 10% owner

Altos Hybrid 3 W, LLC · CIK 0001848638 · 10% owner

Altos Hybrid 4 GP, LLC · CIK 0001848629 · 10% owner

Altos Hybrid 4 GS, LLC · CIK 0001848642 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F18 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 M, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F19 · ownership.nature: These shares are held directly by Altos Hybrid 3 M, LLC

SEC source: 0001209191-21-020613 · doc4.xml · nonDerivative · entry 7

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 2 GP, LLC · CIK 0001848631 · 10% owner

Altos Hybrid 2 P-FIO, LLC · CIK 0001848632 · 10% owner

Altos Hybrid 2 V, LLC · CIK 0001848637 · 10% owner

Altos Hybrid 3 B, LLC · CIK 0001848640 · 10% owner

Altos Hybrid 3 GP, LLC · CIK 0001848630 · 10% owner

Altos Hybrid 3 M, LLC · CIK 0001848639 · 10% owner

Altos Hybrid 3 W, LLC · CIK 0001848638 · 10% owner

Altos Hybrid 4 GP, LLC · CIK 0001848629 · 10% owner

Altos Hybrid 4 GS, LLC · CIK 0001848642 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F16 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 W, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F17 · ownership.nature: These shares are held directly by Altos Hybrid 3 W, LLC

SEC source: 0001209191-21-020613 · doc4.xml · nonDerivative · entry 6

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 2 GP, LLC · CIK 0001848631 · 10% owner

Altos Hybrid 2 P-FIO, LLC · CIK 0001848632 · 10% owner

Altos Hybrid 2 V, LLC · CIK 0001848637 · 10% owner

Altos Hybrid 3 B, LLC · CIK 0001848640 · 10% owner

Altos Hybrid 3 GP, LLC · CIK 0001848630 · 10% owner

Altos Hybrid 3 M, LLC · CIK 0001848639 · 10% owner

Altos Hybrid 3 W, LLC · CIK 0001848638 · 10% owner

Altos Hybrid 4 GP, LLC · CIK 0001848629 · 10% owner

Altos Hybrid 4 GS, LLC · CIK 0001848642 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F14 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid UP, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F15 · ownership.nature: These shares are held directly by Altos Hybrid UP, LLC

SEC source: 0001209191-21-020613 · doc4.xml · nonDerivative · entry 5

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 2 GP, LLC · CIK 0001848631 · 10% owner

Altos Hybrid 2 P-FIO, LLC · CIK 0001848632 · 10% owner

Altos Hybrid 2 V, LLC · CIK 0001848637 · 10% owner

Altos Hybrid 3 B, LLC · CIK 0001848640 · 10% owner

Altos Hybrid 3 GP, LLC · CIK 0001848630 · 10% owner

Altos Hybrid 3 M, LLC · CIK 0001848639 · 10% owner

Altos Hybrid 3 W, LLC · CIK 0001848638 · 10% owner

Altos Hybrid 4 GP, LLC · CIK 0001848629 · 10% owner

Altos Hybrid 4 GS, LLC · CIK 0001848642 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F12 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 B, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F13 · ownership.nature: These shares are held directly by Altos Hybrid 3 B, LLC

SEC source: 0001209191-21-020613 · doc4.xml · nonDerivative · entry 4

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 2 GP, LLC · CIK 0001848631 · 10% owner

Altos Hybrid 2 P-FIO, LLC · CIK 0001848632 · 10% owner

Altos Hybrid 2 V, LLC · CIK 0001848637 · 10% owner

Altos Hybrid 3 B, LLC · CIK 0001848640 · 10% owner

Altos Hybrid 3 GP, LLC · CIK 0001848630 · 10% owner

Altos Hybrid 3 M, LLC · CIK 0001848639 · 10% owner

Altos Hybrid 3 W, LLC · CIK 0001848638 · 10% owner

Altos Hybrid 4 GP, LLC · CIK 0001848629 · 10% owner

Altos Hybrid 4 GS, LLC · CIK 0001848642 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F10 · kind: 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.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F11 · ownership.nature: These shares are held directly by Altos Hybrid 2 P-FIO, LLC

SEC source: 0001209191-21-020613 · doc4.xml · nonDerivative · entry 3

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 2 GP, LLC · CIK 0001848631 · 10% owner

Altos Hybrid 2 P-FIO, LLC · CIK 0001848632 · 10% owner

Altos Hybrid 2 V, LLC · CIK 0001848637 · 10% owner

Altos Hybrid 3 B, LLC · CIK 0001848640 · 10% owner

Altos Hybrid 3 GP, LLC · CIK 0001848630 · 10% owner

Altos Hybrid 3 M, LLC · CIK 0001848639 · 10% owner

Altos Hybrid 3 W, LLC · CIK 0001848638 · 10% owner

Altos Hybrid 4 GP, LLC · CIK 0001848629 · 10% owner

Altos Hybrid 4 GS, LLC · CIK 0001848642 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F8 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 2 V, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F9 · ownership.nature: These shares are held directly by Altos Hybrid 2 V, LLC

SEC source: 0001209191-21-020613 · doc4.xml · nonDerivative · entry 2

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 2 GP, LLC · CIK 0001848631 · 10% owner

Altos Hybrid 2 P-FIO, LLC · CIK 0001848632 · 10% owner

Altos Hybrid 2 V, LLC · CIK 0001848637 · 10% owner

Altos Hybrid 3 B, LLC · CIK 0001848640 · 10% owner

Altos Hybrid 3 GP, LLC · CIK 0001848630 · 10% owner

Altos Hybrid 3 M, LLC · CIK 0001848639 · 10% owner

Altos Hybrid 3 W, LLC · CIK 0001848638 · 10% owner

Altos Hybrid 4 GP, LLC · CIK 0001848629 · 10% owner

Altos Hybrid 4 GS, LLC · CIK 0001848642 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F6 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid HG, LLC to its members.

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

F7 · ownership.nature: These shares are held directly by Altos Hybrid HG, LLC

SEC source: 0001209191-21-020613 · doc4.xml · nonDerivative · entry 1

Altos Ventures IV Liquidity Fund, L.P. · CIK 0001766317 · 10% owner

Altos Hybrid 2 GP, LLC · CIK 0001848631 · 10% owner

Altos Hybrid 2 P-FIO, LLC · CIK 0001848632 · 10% owner

Altos Hybrid 2 V, LLC · CIK 0001848637 · 10% owner

Altos Hybrid 3 B, LLC · CIK 0001848640 · 10% owner

Altos Hybrid 3 GP, LLC · CIK 0001848630 · 10% owner

Altos Hybrid 3 M, LLC · CIK 0001848639 · 10% owner

Altos Hybrid 3 W, LLC · CIK 0001848638 · 10% owner

Altos Hybrid 4 GP, LLC · CIK 0001848629 · 10% owner

Altos Hybrid 4 GS, LLC · CIK 0001848642 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 4 GS, LLC to its members.

F2 · ownership.nature: These shares are held directly by Altos Hybrid 4 GS, LLC

F3 · ownership.nature: 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).

F4 · ownership.nature: (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.

F5 · ownership.nature: 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.

SEC source: 0001209191-21-020612 · doc4.xml · nonDerivative · entry 9

Lee Anthony P · CIK 0001834988 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F17 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid CC, LLC to its members.

F18 · ownership.nature: These shares were held directly by Altos Hybrid CC, LLC.

SEC source: 0001209191-21-020612 · doc4.xml · nonDerivative · entry 8

Lee Anthony P · CIK 0001834988 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F15 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 M, LLC to its members.

F16 · ownership.nature: These shares were held directly by Altos Hybrid 3 M, LLC.

SEC source: 0001209191-21-020612 · doc4.xml · nonDerivative · entry 7

Lee Anthony P · CIK 0001834988 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F13 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 W, LLC to its members.

F14 · ownership.nature: These shares were held directly by Altos Hybrid 3 W, LLC.

SEC source: 0001209191-21-020612 · doc4.xml · nonDerivative · entry 6

Lee Anthony P · CIK 0001834988 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F11 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid UP, LLC to its members.

F12 · ownership.nature: These shares were held directly by Altos Hybrid UP, LLC.

SEC source: 0001209191-21-020612 · doc4.xml · nonDerivative · entry 5

Lee Anthony P · CIK 0001834988 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F9 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 B, LLC to its members.

F10 · ownership.nature: These shares were held directly by Altos Hybrid 3 B, LLC.

SEC source: 0001209191-21-020612 · doc4.xml · nonDerivative · entry 4

Lee Anthony P · CIK 0001834988 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F7 · kind: 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.

F8 · ownership.nature: These shares were held directly by Altos Hybrid 2 P-FIO, LLC.

SEC source: 0001209191-21-020612 · doc4.xml · nonDerivative · entry 3

Lee Anthony P · CIK 0001834988 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F5 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 2 V, LLC to its members.

F6 · ownership.nature: These shares were held directly by Altos Hybrid 2 V, LLC.

SEC source: 0001209191-21-020612 · doc4.xml · nonDerivative · entry 2

Lee Anthony P · CIK 0001834988 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F3 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid HG, LLC to its members.

F4 · ownership.nature: These shares were held directly by Altos Hybrid HG, LLC.

SEC source: 0001209191-21-020612 · doc4.xml · nonDerivative · entry 1

Lee Anthony P · CIK 0001834988 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 4 GS, LLC to its members.

F2 · ownership.nature: These shares were held directly by Altos Hybrid 4 GS, LLC

SEC source: 0000899243-22-006061 · doc4.xml · nonDerivative · entry 6

Index Ventures Growth III (Jersey), L.P. · CIK 0001638260 · 10% owner

Yucca (Jersey) SLP · CIK 0001591294 · 10% owner

Index Venture Growth Associates III Ltd · CIK 0001785453 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Yucca (Jersey) SLP

Disclosed balance after: 738,338

F2 · ownership.nature: The shares are held by Yucca (Jersey) SLP ("Yucca"). Yucca is the administrator of the Index co-investment vehicles that are contractually required to mirror the relevant Fund's investment in the issuer (in this case, Index Growth III). IVGA III disclaims Section 16 beneficial ownership of such shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that such shares are beneficially owned by it for Section 16 or any other purpose.

SEC source: 0000899243-22-006061 · doc4.xml · nonDerivative · entry 5

Index Ventures Growth III (Jersey), L.P. · CIK 0001638260 · 10% owner

Yucca (Jersey) SLP · CIK 0001591294 · 10% owner

Index Venture Growth Associates III Ltd · CIK 0001785453 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,482,264

F1 · ownership.direct: The shares are held by Index Ventures Growth III (Jersey), L.P. ("Index Growth III"). Index Venture Growth Associates III Limited ("IVGA III") is the managing general partner of Index Growth III and disclaims Section 16 beneficial ownership of such shares except to the extent of its pecuniary interest therein, if any.

SEC source: 0000899243-22-006061 · doc4.xml · nonDerivative · entry 4

Index Ventures Growth III (Jersey), L.P. · CIK 0001638260 · 10% owner

Yucca (Jersey) SLP · CIK 0001591294 · 10% owner

Index Venture Growth Associates III Ltd · CIK 0001785453 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Yucca (Jersey) SLP

Disclosed balance after: 745,691

F2 · ownership.nature: The shares are held by Yucca (Jersey) SLP ("Yucca"). Yucca is the administrator of the Index co-investment vehicles that are contractually required to mirror the relevant Fund's investment in the issuer (in this case, Index Growth III). IVGA III disclaims Section 16 beneficial ownership of such shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that such shares are beneficially owned by it for Section 16 or any other purpose.

SEC source: 0000899243-22-006061 · doc4.xml · nonDerivative · entry 3

Index Ventures Growth III (Jersey), L.P. · CIK 0001638260 · 10% owner

Yucca (Jersey) SLP · CIK 0001591294 · 10% owner

Index Venture Growth Associates III Ltd · CIK 0001785453 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,965,140

F1 · ownership.direct: The shares are held by Index Ventures Growth III (Jersey), L.P. ("Index Growth III"). Index Venture Growth Associates III Limited ("IVGA III") is the managing general partner of Index Growth III and disclaims Section 16 beneficial ownership of such shares except to the extent of its pecuniary interest therein, if any.

SEC source: 0001209191-23-009473 · doc4a.xml · nonDerivative · entry 1

Lee Anthony P · CIK 0001834988 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,542,492

F1 · kind: Represents a pro-rata in kind distribution of Class A Common Stock received by the reporting person on March 11, 2021 and not previously reported.

F2 · balance_after: Represents the total number of shares held by the Fallen Leaf Revocable Trust as of the date of the filing of this Form 4/A.

F3 · ownership.nature: These shares are held directly by Fallen Leaf Revocable Trust for which the Reporting Person serves as trustee. The Reporting Person disclaims beneficial ownership of the shares except to the extent if his pecuniary interest therein.

SEC source: 0001209191-21-020320 · doc4.xml · derivative · entry 7

Reinstra Mark · CIK 0001835037 · Gen. Counsel & Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 591,264

Underlying: Class A Common Stock · 150,000 shares

Expires 2030-12-09

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: 1/4th of the shares subject to the option became vested and exercisable on December 4, 2020 and 1/48th of the shares subject to the option shall continue to vest each month thereafter, provided that the reporting person is a service provider to the issuer as of each vest date.

SEC source: 0001209191-21-020320 · doc4.xml · nonDerivative · entry 3

Reinstra Mark · CIK 0001835037 · Gen. Counsel & Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,736

SEC source: 0001209191-21-020320 · doc4.xml · nonDerivative · entry 2

Reinstra Mark · CIK 0001835037 · Gen. Counsel & Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,736

SEC source: 0001209191-21-020320 · doc4.xml · nonDerivative · entry 1

Reinstra Mark · CIK 0001835037 · Gen. Counsel & Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 208,736

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-21-020322 · doc4.xml · nonDerivative · entry 3

Tolley Brett · CIK 0001835039 · Principal Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 76,775

F2 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $70.82 to $71.36, inclusive. The reporting person undertakes to provide Roblox Corporation, any security holder of Roblox Corporation 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.

SEC source: 0001209191-21-020322 · doc4.xml · nonDerivative · entry 2

Tolley Brett · CIK 0001835039 · Principal Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 108,775

F1 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $69.74 to $70.50, inclusive. The reporting person undertakes to provide Roblox Corporation, any security holder of Roblox Corporation 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.

SEC source: 0001209191-21-020322 · doc4.xml · nonDerivative · entry 1

Tolley Brett · CIK 0001835039 · Principal Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 153,775

SEC source: 0001209191-21-020317 · doc4.xml · derivative · entry 16

Donato Craig · CIK 0001834992 · Chief Business Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 206,251

Underlying: Class A Common Stock · 74,999 shares

Expires 2029-12-21

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F7 · derivative.exercise_date: 1/48th of the shares subject to the option became vested and exercisable on December 22, 2019, and 1/48th of the shares subject to the option vest each month thereafter, subject to the Reporting Person continuing as a service provider through each such date.