RBLX

SEC source: 0001209191-23-057951 · doc4.xml · nonDerivative · entry 1

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

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

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

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

Altos Hybrid 2, L.P. · CIK 0001694364 · 10% owner

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

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 9,605,481

F1 · kind: Represents a pro-rata in kind distribution of shares of the Issuer's Class A Common Stock by Altos Ventures IV, L.P. to its partners.

F2 · ownership.nature: These shares are held directly by Altos Ventures IV, L.P.

F3 · ownership.nature: 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 IV LR GP, LLC; the general partner of Altos Roblox SPV 1, LLC and Altos Roblox SPV 2, LLC is Altos Roblox Management Partners, LLC; and the general partner of Altos Roblox SPV 2020, LLC is Altos Roblox 2020 Management Partners, LLC (collectively, the "General Partners").

F4 · 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 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.

SEC source: 0001209191-23-057966 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 428,993

F3 · kind: Represents a pro-rata in kind distribution of shares of the Issuer's Class A Common Stock by Altos Roblox SPV 2, LLC to its partners.

F4 · ownership.nature: These shares are held directly by Fallen Leaf LLC - Sub Fund No. 1 for which the Reporting Person serves as managing member. The Reporting Person disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein.

SEC source: 0001209191-23-057966 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 4,050,679

F1 · kind: Represents shares of the Issuer's Class A Common Stock received by the reporting person in distributions from Altos Ventures IV, L.P., Altos Ventures IV Liquidity Fund, LP, Altos Ventures IV Reserve Fund, LP, Altos Roblox SPV 1, LLC, Altos Roblox SPV 2, LLC, Altos Hybrid 2, L.P.

F2 · 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: 0001104659-25-016648 · tm257476-1_4seq1.xml · nonDerivative · entry 20

Bronstein Manuel · CIK 0001847776 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 659,173

F1 · kind: The shares were inadvertently acquired by a third party pursuant to the Reporting Person's direct indexing account, which included shares of the Issuer among shares of other public companies within an existing stock index. Such acquisitions were only recently discovered. See "Remarks" below.

F2 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000196 · wk-form4_1701303730.xml · nonDerivative · entry 2

Baszucki Gregory · CIK 0001834990 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 9,803,269

F4 · kind: The shares reported in this transaction represent a gift to a Donor Advised Fund.

F3 · ownership.nature: These shares are held of record by the Greg and Christina Baszucki Living Trust dtd 08/18/2006 of which the Reporting Person serves as trustee. The Reporting Person may be deemed to have beneficial ownership of the shares held by the Trust.

SEC source: 0001315098-23-000196 · wk-form4_1701303730.xml · nonDerivative · entry 1

Baszucki Gregory · CIK 0001834990 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 9,830,269

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 Plan adopted by the Reporting Person on November 28, 2022.

F2 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $38.56 to $39.26, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: These shares are held of record by the Greg and Christina Baszucki Living Trust dtd 08/18/2006 of which the Reporting Person serves as trustee. The Reporting Person may be deemed to have beneficial ownership of the shares held by the Trust.

SEC source: 0001315098-23-000194 · wk-form4_1701212936.xml · nonDerivative · entry 1

Rawlings Amy Marie · CIK 0001875017 · Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 95,230

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 Plan adopted by the Reporting Person on August 28, 2023.

F2 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001209191-23-056894 · doc4.xml · nonDerivative · entry 1

Kim Han · CIK 0001836652 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,284,862

F1 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $38.53 to $38.97, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2 · ownership.nature: These shares are held directly by The Kim Living Trust for which Mr. Kim serves as trustee. Mr. Kim disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein.

SEC source: 0001315098-23-000188 · wk-form4_1700857195.xml · nonDerivative · entry 4

Guthrie Michael · CIK 0001607880 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 61,422

F5 · kind: Represents a gift of shares to the Guthrie Family Irrevocable GST Exempt Trust dtd. 10/29/2021.

F6 · ownership.nature: These shares are held by the Guthrie Family Irrevocable GST Exempt Trust dtd. 10/29/2021. The Reporting Person may be deemed to have beneficial ownership of the securities held by the trust.

SEC source: 0001315098-23-000188 · wk-form4_1700857195.xml · nonDerivative · entry 3

Guthrie Michael · CIK 0001607880 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 244,601

F5 · kind: Represents a gift of shares to the Guthrie Family Irrevocable GST Exempt Trust dtd. 10/29/2021.

F3 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000178 · wk-form4_1700693982.xml · nonDerivative · entry 3

Sturman Daniel · CIK 0001835042 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 482,177

F3 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F5 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $37.35 to $37.43, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000178 · wk-form4_1700693982.xml · nonDerivative · entry 2

Sturman Daniel · CIK 0001835042 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 482,285

F3 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F4 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $36.35 to $37.34, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000192 · wk-form4_1700857390.xml · nonDerivative · entry 2

Rawlings Amy Marie · CIK 0001875017 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 97,753

F1 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F4 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $37.35 to $37.43, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000192 · wk-form4_1700857390.xml · nonDerivative · entry 1

Rawlings Amy Marie · CIK 0001875017 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 97,798

F1 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F2 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $36.35 to $37.34, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001209191-23-056589 · doc4.xml · nonDerivative · entry 1

Kim Han · CIK 0001836652 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,384,862

F1 · ownership.nature: These shares are held directly by The Kim Living Trust for which Mr. Kim serves as trustee. Mr. Kim disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein.

SEC source: 0001315098-23-000190 · wk-form4_1700857289.xml · nonDerivative · entry 2

Bronstein Manuel · CIK 0001847776 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 738,417

F1 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F4 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $37.35 to $37.43, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000190 · wk-form4_1700857289.xml · nonDerivative · entry 1

Bronstein Manuel · CIK 0001847776 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 738,806

F1 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F2 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $36.35 to $37.34, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000186 · wk-form4_1700857100.xml · nonDerivative · entry 2

Messing Barbara · CIK 0001615151 · CMKtg & Communications Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 234,241

F1 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F4 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $37.35 to $37.43, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000186 · wk-form4_1700857100.xml · nonDerivative · entry 1

Messing Barbara · CIK 0001615151 · CMKtg & Communications Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 234,348

F1 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F2 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $36.35 to $37.34, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000188 · wk-form4_1700857195.xml · nonDerivative · entry 2

Guthrie Michael · CIK 0001607880 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 258,232

F1 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F4 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $37.35 to $37.43, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000188 · wk-form4_1700857195.xml · nonDerivative · entry 1

Guthrie Michael · CIK 0001607880 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 258,379

F1 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F2 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $36.35 to $37.34, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000184 · wk-form4_1700856984.xml · derivative · entry 10

Reinstra Mark · CIK 0001835037 · Gen. Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 461,896

Underlying: Class A Common Stock · 4,000 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.

F12 · 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 vest each month thereafter, subject to the Reporting Person continuing as a service provider through each such date.

SEC source: 0001315098-23-000184 · wk-form4_1700856984.xml · nonDerivative · entry 4

Reinstra Mark · CIK 0001835037 · Gen. Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 228,942

F4 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F6 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $37.35 to $37.43, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F1 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000184 · wk-form4_1700856984.xml · nonDerivative · entry 3

Reinstra Mark · CIK 0001835037 · Gen. Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 229,060

F4 · kind: Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs). This sale was to satisfy tax withholding obligations to be funded by a "sell to cover' transaction.

F5 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $36.35 to $37.34, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F1 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000184 · wk-form4_1700856984.xml · nonDerivative · entry 2

Reinstra Mark · CIK 0001835037 · Gen. Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 240,763

F3 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 Plan adopted by the Reporting Person on February 24, 2023.

F1 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000184 · wk-form4_1700856984.xml · nonDerivative · entry 1

Reinstra Mark · CIK 0001835037 · Gen. Counsel & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 244,763

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.

F1 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

F2 · balance_after: On October 26, 2023, the Reporting Person transferred 40,000 shares of Class A common stock to the Mark L. Reinstra 2023 Annuity Trust and 40,000 shares of Class A common stock to the Susan P. Reinstra 2023 Annuity Trust.

SEC source: 0001315098-23-000182 · wk-form4_1700694415.xml · derivative · entry 2

Mastantuono Gina · CIK 0001465391 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,192

Underlying: Class A Common Stock · 1,596 shares

Expires not disclosed

F3 · derivative.exercise_price: Each share of phantom stock represents a right to receive one share of Class A common stock.

F1 · kind: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,596 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 1,596 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 1,596 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F1 · price: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,596 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 1,596 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 1,596 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F4 · derivative.exercise_date: The phantom stock becomes payable in two lump sum payments each at 50% on March 1, 2028 subject to the Reporting Person continuing as a service provider through March 1, 2028 and 50% on a separation from service.

F4 · derivative.expiration_date: The phantom stock becomes payable in two lump sum payments each at 50% on March 1, 2028 subject to the Reporting Person continuing as a service provider through March 1, 2028 and 50% on a separation from service.

SEC source: 0001315098-23-000182 · wk-form4_1700694415.xml · nonDerivative · entry 1

Mastantuono Gina · CIK 0001465391 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,562

F1 · kind: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,596 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 1,596 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 1,596 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F1 · price: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,596 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 1,596 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 1,596 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F1 · balance_after: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,596 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 1,596 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 1,596 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F2 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000180 · wk-form4_1700694247.xml · derivative · entry 6

Baszucki Gregory · CIK 0001834990 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,192

Underlying: Class A Common Stock · 1,596 shares

Expires not disclosed

F7 · derivative.exercise_price: Each share of phantom stock represents a right to receive one share of Class A common stock.

F1 · kind: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,596 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 1,596 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 1,596 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F1 · price: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,596 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 1,596 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 1,596 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F8 · derivative.exercise_date: The phantom stock becomes payable in 10 equal annual installments starting on the date the Reporting Person ceases to be a service provider.

F8 · derivative.expiration_date: The phantom stock becomes payable in 10 equal annual installments starting on the date the Reporting Person ceases to be a service provider.

SEC source: 0001315098-23-000180 · wk-form4_1700694247.xml · nonDerivative · entry 1

Baszucki Gregory · CIK 0001834990 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,410

F1 · kind: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,596 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 1,596 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 1,596 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F1 · price: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,596 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 1,596 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 1,596 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F1 · balance_after: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 1,596 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 1,596 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 1,596 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F2 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001315098-23-000178 · wk-form4_1700693982.xml · derivative · entry 6

Sturman Daniel · CIK 0001835042 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,271

Underlying: Class A Common Stock · 11,757 shares

Expires not disclosed

F8 · derivative.exercise_price: Each share of phantom stock represents a right to receive one share of Class A common stock.

F1 · kind: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 11,757 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 11,757 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 11,757 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F1 · price: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 11,757 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 11,757 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 11,757 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F9 · derivative.exercise_date: The phantom stock becomes payable in 3 equal annual installments starting on March 1, 2026 subject to the Reporting Person continuing as a service provider through March 1, 2026.

F9 · derivative.expiration_date: The phantom stock becomes payable in 3 equal annual installments starting on March 1, 2026 subject to the Reporting Person continuing as a service provider through March 1, 2026.

SEC source: 0001315098-23-000178 · wk-form4_1700693982.xml · nonDerivative · entry 1

Sturman Daniel · CIK 0001835042 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 493,014

F1 · kind: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 11,757 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 11,757 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 11,757 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F1 · price: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 11,757 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 11,757 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 11,757 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F1 · balance_after: In connection with the vesting on November 20, 2023, of restricted stock units previously granted to the reporting person, the reporting person's receipt of 11,757 shares of Class A common stock was deferred, resulting in the reporting person's receipt instead of 11,757 shares of phantom stock pursuant to Roblox Corporation's deferred compensation plan. The reporting person is therefore reporting the disposition of 11,757 shares of Class A common stock in exchange for an equal number of shares of phantom stock.

F2 · balance_after: A portion of these securities are Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock.

SEC source: 0001209191-23-056374 · doc4.xml · nonDerivative · entry 8

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

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

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

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

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

Altos Hybrid 2, L.P. · CIK 0001694364 · 10% owner

Altos Ventures Management, Inc. · CIK 0001881755 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 87,749

F17 · kind: Represents shares of the Issuer's Class A Common Stock received in pro-rata in kind distributions Altos Ventures IV, L.P., Altos Ventures IV Liquidity Fund, L.P., Altos Roblox SPV 2020, LLC and Altos Hybrid 2, LP to their respective partners.

F18 · kind: The members of the Board of Directors of Altos Ventures Management, Inc. (AVMI) are Anthony P. Lee, Hodong Nam and Han Kim, who exercise voting and investment control over the shares. Each member of the Board of Directors of AVMI disclaim beneficial ownership of the shares except to the extent of their pecuniary interest therein.

SEC source: 0001209191-23-056374 · doc4.xml · nonDerivative · entry 7

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

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

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

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

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

Altos Hybrid 2, L.P. · CIK 0001694364 · 10% owner

Altos Ventures Management, Inc. · CIK 0001881755 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 214,135

F15 · kind: Represents a pro-rata in kind distribution of shares of the Issuer's Class A Common Stock by Altos Hybrid 2, L.P. to its partners.

F3 · ownership.nature: 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 IV LR GP, LLC; the general partner of Altos Roblox SPV 1, LLC and Altos Roblox SPV 2, LLC is Altos Roblox Management Partners, LLC; and the general partner of Altos Roblox SPV 2020, LLC is Altos Roblox 2020 Management Partners, LLC (collectively, the General Partners).

F4 · 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 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.

F16 · ownership.nature: These shares are held directly by Altos Hybrid 2, L.P.

SEC source: 0001209191-23-056374 · doc4.xml · nonDerivative · entry 6

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

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

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

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

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

Altos Hybrid 2, L.P. · CIK 0001694364 · 10% owner

Altos Ventures Management, Inc. · CIK 0001881755 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 12,816,918

F13 · kind: Represents a pro-rata in kind distribution of shares of the Issuer's Class A Common Stock by Altos Roblox SPV 1, LLC to its partners.

F3 · ownership.nature: 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 IV LR GP, LLC; the general partner of Altos Roblox SPV 1, LLC and Altos Roblox SPV 2, LLC is Altos Roblox Management Partners, LLC; and the general partner of Altos Roblox SPV 2020, LLC is Altos Roblox 2020 Management Partners, LLC (collectively, the General Partners).

F4 · 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 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.

F14 · ownership.nature: These shares are held directly by Altos Roblox SPV 1, LLC.

SEC source: 0001209191-23-056374 · doc4.xml · nonDerivative · entry 5

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

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

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

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

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

Altos Hybrid 2, L.P. · CIK 0001694364 · 10% owner

Altos Ventures Management, Inc. · CIK 0001881755 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,792,784

F11 · kind: Represents a pro-rata in kind distribution of shares of the Issuer's Class A Common Stock by Altos Roblox SPV 2, LLC to its partners.

F3 · ownership.nature: 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 IV LR GP, LLC; the general partner of Altos Roblox SPV 1, LLC and Altos Roblox SPV 2, LLC is Altos Roblox Management Partners, LLC; and the general partner of Altos Roblox SPV 2020, LLC is Altos Roblox 2020 Management Partners, LLC (collectively, the General Partners).

F4 · 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 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.

F12 · ownership.nature: These shares are held directly by Altos Roblox SPV 2, LLC.

SEC source: 0001209191-23-056374 · doc4.xml · nonDerivative · entry 4

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

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

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

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

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

Altos Hybrid 2, L.P. · CIK 0001694364 · 10% owner

Altos Ventures Management, Inc. · CIK 0001881755 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 8,926,379

F9 · kind: Represents a pro-rata in kind distribution of shares of the Issuer's Class A Common Stock by Altos Roblox SPV 2020, LLC to its partners.

F3 · ownership.nature: 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 IV LR GP, LLC; the general partner of Altos Roblox SPV 1, LLC and Altos Roblox SPV 2, LLC is Altos Roblox Management Partners, LLC; and the general partner of Altos Roblox SPV 2020, LLC is Altos Roblox 2020 Management Partners, LLC (collectively, the General Partners).

F4 · 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 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.

F10 · ownership.nature: These shares are held directly by Altos Roblox SPV 2020, LLC.

SEC source: 0001209191-23-056374 · doc4.xml · nonDerivative · entry 3

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

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

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

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

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

Altos Hybrid 2, L.P. · CIK 0001694364 · 10% owner

Altos Ventures Management, Inc. · CIK 0001881755 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 19,248,961

F7 · kind: Represents a pro-rata in kind distribution of shares of the Issuer's Class A Common Stock by Altos Ventures IV Liquidity Fund, L.P. to its partners.

F3 · ownership.nature: 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 IV LR GP, LLC; the general partner of Altos Roblox SPV 1, LLC and Altos Roblox SPV 2, LLC is Altos Roblox Management Partners, LLC; and the general partner of Altos Roblox SPV 2020, LLC is Altos Roblox 2020 Management Partners, LLC (collectively, the General Partners).

F4 · 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 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.

F8 · ownership.nature: These shares are held directly by Altos Ventures IV Liquidity Fund, L.P.

SEC source: 0001209191-23-056374 · doc4.xml · nonDerivative · entry 2

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

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

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

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

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

Altos Hybrid 2, L.P. · CIK 0001694364 · 10% owner

Altos Ventures Management, Inc. · CIK 0001881755 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 417,515

F5 · kind: Represents a pro-rata in kind distribution of shares of the Issuer's Class A Common Stock by Altos Ventures IV Reserve Fund, L.P. to its partners.

F3 · ownership.nature: 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 IV LR GP, LLC; the general partner of Altos Roblox SPV 1, LLC and Altos Roblox SPV 2, LLC is Altos Roblox Management Partners, LLC; and the general partner of Altos Roblox SPV 2020, LLC is Altos Roblox 2020 Management Partners, LLC (collectively, the General Partners).

F4 · 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 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.

F6 · ownership.nature: These shares are held directly by Altos Ventures IV Reserve Fund, L.P.

SEC source: 0001209191-23-056374 · doc4.xml · nonDerivative · entry 1

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

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

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

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

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

Altos Hybrid 2, L.P. · CIK 0001694364 · 10% owner

Altos Ventures Management, Inc. · CIK 0001881755 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 10,672,756

F1 · kind: Represents a pro-rata in kind distribution of shares of the Issuer's Class A Common Stock by Altos Ventures IV, L.P. to its partners.

F2 · ownership.nature: These shares are held directly by Altos Ventures IV, L.P.

F3 · ownership.nature: 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 IV LR GP, LLC; the general partner of Altos Roblox SPV 1, LLC and Altos Roblox SPV 2, LLC is Altos Roblox Management Partners, LLC; and the general partner of Altos Roblox SPV 2020, LLC is Altos Roblox 2020 Management Partners, LLC (collectively, the General Partners).

F4 · 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 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.

SEC source: 0001209191-23-056378 · doc4.xml · nonDerivative · entry 8

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

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

Nam Hodong · CIK 0001836648 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 379,846

F4 · kind: Represents shares of the Issuer's Class A Common Stock received in pro-rata in kind distributions Altos Ventures IV, L.P., Altos Ventures IV Liquidity Fund, L.P., Altos Ventures IV Reserve Fund, L.P., Altos Roblox SPV 1, LLC, Altos Roblox SPV 2, LLC, Altos Roblox SPV 2020, LLC and Altos Hybrid 2, LP to their respective partners.

F11 · ownership.nature: These shares are held directly by Han Family Investments, LLC - Sub Fund No. 1 which Mr. Kim serves as Managing Member. Mr. Kim disclaims beneficial ownership of the shares except to the extent of pecuniary interest therein.

SEC source: 0001209191-23-056378 · doc4.xml · nonDerivative · entry 7

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

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

Nam Hodong · CIK 0001836648 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,458,112

F4 · kind: Represents shares of the Issuer's Class A Common Stock received in pro-rata in kind distributions Altos Ventures IV, L.P., Altos Ventures IV Liquidity Fund, L.P., Altos Ventures IV Reserve Fund, L.P., Altos Roblox SPV 1, LLC, Altos Roblox SPV 2, LLC, Altos Roblox SPV 2020, LLC and Altos Hybrid 2, LP to their respective partners.

F10 · ownership.nature: These shares are held directly by The Kim Living Trust for which Mr. Kim serves as trustee. Mr. Kim disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein.

SEC source: 0001209191-23-056378 · doc4.xml · nonDerivative · entry 3

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

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

Nam Hodong · CIK 0001836648 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 379,843

F4 · kind: Represents shares of the Issuer's Class A Common Stock received in pro-rata in kind distributions Altos Ventures IV, L.P., Altos Ventures IV Liquidity Fund, L.P., Altos Ventures IV Reserve Fund, L.P., Altos Roblox SPV 1, LLC, Altos Roblox SPV 2, LLC, Altos Roblox SPV 2020, LLC and Altos Hybrid 2, LP to their respective partners.

F6 · ownership.nature: These shares are directly by Nam-MacGill Investments, LLC - Sub Fund No. 1 for which Mr. Nam serves as Managing Member. Mr. Nam disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein.

SEC source: 0001209191-23-056378 · doc4.xml · nonDerivative · entry 2

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

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

Nam Hodong · CIK 0001836648 · 10% owner

Kim Han · CIK 0001836652 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,560,116

F4 · kind: Represents shares of the Issuer's Class A Common Stock received in pro-rata in kind distributions Altos Ventures IV, L.P., Altos Ventures IV Liquidity Fund, L.P., Altos Ventures IV Reserve Fund, L.P., Altos Roblox SPV 1, LLC, Altos Roblox SPV 2, LLC, Altos Roblox SPV 2020, LLC and Altos Hybrid 2, LP to their respective partners.

F5 · ownership.nature: These shares are held 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 interest therein.

SEC source: 0001209191-23-056382 · doc4.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 379,844

F1 · kind: Represents shares of the Issuer's Class A Common Stock received in pro-rata in kind distributions Altos Ventures IV, L.P., Altos Ventures IV Reserve Fund, L.P., Altos Roblox SPV 1, LLC, Altos Roblox SPV 2, LLC, Altos Ventures IV Liquidity Fund, L.P., Altos Roblox SPV 2020, LLC and Altos Hybrid 2, LP to their respective partners.

F3 · ownership.nature: These shares are held directly by Fallen Leaf LLC - Sub Fund No. 1 for which the Reporting Person serves as managing member. The Reporting Person disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein.

SEC source: 0001209191-23-056382 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,628,141

F1 · kind: Represents shares of the Issuer's Class A Common Stock received in pro-rata in kind distributions Altos Ventures IV, L.P., Altos Ventures IV Reserve Fund, L.P., Altos Roblox SPV 1, LLC, Altos Roblox SPV 2, LLC, Altos Ventures IV Liquidity Fund, L.P., Altos Roblox SPV 2020, LLC and Altos Hybrid 2, LP to their respective partners.

F2 · 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: 0001209191-23-055423 · doc4.xml · nonDerivative · entry 1

Nam Hodong · CIK 0001836648 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 2,987,505

F1 · ownership.nature: These shares are held 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 interest therein.

SEC source: 0001315098-23-000176 · wk-form4_1700002653.xml · derivative · entry 20

Baszucki David · CIK 0001834991 · Director · President & CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,238,576

Underlying: Class A Common Stock · 375,000 shares

Expires 2026-03-21

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.

F12 · derivative.exercise_date: All of the shares subject to the option are fully vested and exercisable as of the date hereof.

SEC source: 0001315098-23-000176 · wk-form4_1700002653.xml · nonDerivative · entry 16

Baszucki David · CIK 0001834991 · Director · President & CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 955,385

F7 · kind: The shares reported in this transaction represent a gift to a charitable organization.

F5 · ownership.nature: These shares are held directly by The Freedom Revocable Trust dated February 28, 2017 as amended, and for which the reporting person serves as trustee.

SEC source: 0001315098-23-000176 · wk-form4_1700002653.xml · nonDerivative · entry 15

Baszucki David · CIK 0001834991 · Director · President & CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 Plan adopted by the Reporting Person on February 17, 2023.

F9 · price: The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $38.13 to $38.82, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F6 · ownership.nature: These shares are held by The Baszucki Family Foundation. The Reporting Person may be deemed to have beneficial ownership of the securities held by the Foundation.