Sec Form 4 Filing - Altos Ventures IV Liquidity Fund, L.P. @ Roblox Corp - 2021-03-11

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Altos Ventures IV Liquidity Fund, L.P. 2. Issuer Name and Ticker or Trading Symbol Roblox Corp [ RBLX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2882 SAND HILL ROAD, SUITE 100 3. Date of Earliest Transaction (MM/DD/YY) 03/11/2021 (Street) MENLO PARK, CA94025 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock 03/11/2021 J( 1 ) 466,666 D $ 0 0 I See Footnotes ( 2 ) ( 3 ) ( 4 ) ( 5 ) Class A Common Stock 03/11/2021 J( 6 ) 344,444 D $ 0 0 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 7 ) Class A Common Stock 03/11/2021 J( 8 ) 111,111 D $ 0 0 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 9 ) Class A Common Stock 03/11/2021 J( 10 ) 222,222 D $ 0 0 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 11 ) Class A Common Stock 03/11/2021 J( 12 ) 222,222 D $ 0 0 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 13 ) Class A Common Stock 03/11/2021 J( 14 ) 111,111 D $ 0 0 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 15 ) Class A Common Stock 03/11/2021 J( 16 ) 111,111 D $ 0 0 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 17 ) Class A Common Stock 03/11/2021 J( 18 ) 22,222 D $ 0 0 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 19 ) Class A Common Stock 03/11/2021 J( 20 ) 55,555 D $ 0 0 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 21 ) Class A Common Stock 475,582 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 22 ) Class A Common Stock 111,112 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 23 ) Class A Common Stock 24,553,106 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 24 ) Class A Common Stock 3,416,653 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 25 ) Class A Common Stock 17,026,377 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 26 ) Class A Common Stock 36,507,533 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 27 ) Class A Common Stock 786,183 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 28 ) Class A Common Stock 20,340,126 I See Footnotes ( 3 ) ( 4 ) ( 5 ) ( 29 ) Class A Common Stock 389,022 I See Footnotes ( 30 ) Class A Common Stock 389,023 I See Footnotes ( 31 ) Class A Common Stock 7,236 I See Footnotes ( 32 ) Class A Common Stock 7,236 I See Footnotes ( 31 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Secur ity 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Altos Ventures IV Liquidity Fund, L.P. 2882 SAND HILL ROAD SUITE 100 MENLO PARK, CA94025 X Altos Hybrid 2 GP, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK, CA94025 X Altos Hybrid 2 P-FIO, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK, CA94025 X Altos Hybrid 2 V, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK, CA94025 X Altos Hybrid 3 B, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK, CA94025 X Altos Hybrid 3 GP, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK, CA94025 X Altos Hybrid 3 M, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK, CA94025 X Altos Hybrid 3 W, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK, CA94025 X Altos Hybrid 4 GP, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK, CA94025 X Altos Hybrid 4 GS, LLC 2882 SAND HILL ROAD, SUITE 100 MENLO PARK, CA94025 X Signatures Anthony P. Lee, Managing Director of Altos Management Partners IV, LLC, the General Partner of Altos Ventures IV Liquidity Fund, L.P. 03/15/2021 Signature of Reporting Person Date Anthony P. Lee, Managing Director of Altos Hybrid 2 GP, LLC 03/12/2021 Signature of Reporting Person Date Anthony P Lee, Managing Director of Altos Hybrid 2 GP, LLC, the Manager of Altos Hybrid 2 P-FIO, LLC 03/12/2021 Signature of Reporting Person Date Anthony P. Lee, Managing Director of Altos Hybrid 2 GP, LLC, the Manager of Altos Hybrid 2 V, LLC 03/12/2021 Signature of Reporting Person Date Anthony P. Lee, Managing Member of Altos Hybrid 3 GP, LLC, the Manager of Altos Hybrid 3 B, LLC 03/12/2021 Signature of Reporting Person Date Anthony P. Lee, Managing Director of Altos Hybrid 3 GP, LLC 03/12/2021 Signature of Reporting Person Date Anthony P. Lee, Managing Member of Altos Hybrid 3 GP, LLC, the Manager of Altos Hybrid 3 M, LLC 03/12/2021 Signature of Reporting Person Date Anthony P. Lee, Managing Director of Altos Hybrid 3 GP, LLC, the Manager of Altos Hybrid 3 W, LLC 03/12/2021 Signature of Reporting Person Date Anthony P. Lee, Managing Director of Altos Hybrid 4 GP, LLC 03/12/2021 Signature of Reporting Person Date Anthony P. Lee, Managing Director of Altos Hybrid 4 GP, LLC, the Manager of Altos Hybrid 4 GS, LLC 03/12/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 4 GS, LLC to its members. ( 2 )These shares are held directly by Altos Hybrid 4 GS, LLC ( 3 )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 a nd 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). ( 4 )(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. ( 5 )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. ( 6 )Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid HG, LLC to its members. ( 7 )These shares are held directly by Altos Hybrid HG, LLC ( 8 )Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 2 V, LLC to its members. ( 9 )These shares are held directly by Altos Hybrid 2 V, LLC ( 10 )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. ( 11 )These shares are held directly by Altos Hybrid 2 P-FIO, LLC ( 12 )Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 B, LLC to its members. ( 13 )These shares are held directly by Altos Hybrid 3 B, LLC ( 14 )Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid UP, LLC to its members. ( 15 )These shares are held directly by Altos Hybrid UP, LLC ( 16 )Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 W, LLC to its members. ( 17 )These shares are held directly by Altos Hybrid 3 W, LLC ( 18 )Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid 3 M, LLC to its members. ( 19 )These shares are held directly by Altos Hybrid 3 M, LLC ( 20 )Represents a pro-rata in kind distribution of the issuer's Class A Common Stock by Altos Hybrid CC, LLC to its members. ( 21 )These shares are held directly by Altos Hybrid CC, LLC ( 22 )These shares are held directly by Altos Hybrid 2, L.P. ( 23 )These shares are held directly by Altos Hybrid 4, L.P. ( 24 )These shares are held directly by Altos Roblox SPV 1, LLC ( 25 )These shares are held directly by Altos Roblox SPV 2, LLC ( 26 )These shares are held directly by Altos Roblox SPV 2020, LLC ( 27 )These shares are held directly by Altos Ventures IV Liquidity Fund, L.P. ( 28 )These shares are held directly by Altos Ventures IV Reserve Fund, L.P. ( 29 )These shares are held directly by Altos Ventures IV, L.P. ( 30 )These shares are held directly by the The Kim Living Trust for which Han Kim serves as trustee. Mr. Kim disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein. ( 31 )These shares are held directly by the Nam-MacGill 2006 Family Trust for which Hodong Nam serves as trustee. Mr. Nam disclaims beneficial ownership of such shares except to the extent of his pecuniary interes therein. ( 32 )These shares are held directly by the Han Family Investments, LLC - Sub Fund No. 1 for which Han Kim serves as Managing Member. Mr. Kim disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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