Sec Form 4 Filing - Aria Renewable Energy Systems LLC @ Archaea Energy Inc. - 2022-03-25

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 Aria Renewable Energy Systems LLC 2. Issuer Name and Ticker or Trading Symbol Archaea Energy Inc. [ LFG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2000 AVENUE OF THE STARS, 12TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 03/25/2022 (Street) LOS ANGELES, CA90067 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 B Common Stock 03/25/2022 J( 1 ) 14,942,643 D $ 0 0 D( 2 )( 3 )( 4 )( 5 ) Class A Common Stock 03/25/2022 C( 1 ) 14,942,643 A $ 0 14,942,643 D( 2 )( 3 )( 4 )( 5 ) Class A Common Stock 03/25/2022 S( 1 ) 14,942,643 D $ 17.04 0 D( 2 )( 3 )( 4 )( 5 )

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 Security 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 LFG Class A Units ( 1 ) 03/25/2022 C( 1 ) 14,942,643 ( 1 ) ( 1 ) Class A Common Stock 14,942,643 $ 0 0 D( 2 )( 3 )( 4 )( 5 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Aria Renewable Energy Systems LLC 2000 AVENUE OF THE STARS 12TH FLOOR LOS ANGELES, CA90067 X X UNITED STATES POWER FUND III, L.P. C/O ARES MANAGEMENT LLC THREE CHARLES RIVER PLACE, SUITE 101 NEEDHAM, MA02494 X X EIF US Power III, LLC 2000 AVENUE OF THE STARS 12TH FLOOR LOS ANGELES, CA90067 X X EIF United States Power Fund IV, L.P. C/O ARES MANAGEMENT LLC THREE CHARLES RIVER PLACE, SUITE 101 NEEDHAM, MA02494 X X EIF US Power IV, LLC 2000 AVENUE OF THE STARS 12TH FLOOR LOS ANGELES, CA90067 X X ARES EIF MANAGEMENT, LLC 2000 AVENUE OF THE STARS 12TH FLOOR LOS ANGELES, CA90067 X X Signatures Aria Renewable Energy Systems LLC By: /s/ Noah Ehrenpreis, Vice President 03/28/2022 Signature of Reporting Person Date United States Power Fund III, L.P. By: EIF US Power III, LLC, its general partner By: Ares EIF Management, LLC, its managing member By: /s/ Noah Ehrenpreis, Vice President 03/28/2022 Signature of Reporting Person Date EIF US Power III, LLC By: Ares EIF Management, LLC, its managing member By: /s/ Noah Ehrenpreis, Vice President 03/28/2022 Signature of Reporting Person Date EIF United States Power Fund IV, L.P. By: EIF US Power IV, LLC, its general partner By: Ares EIF Management, LLC, its managing member By: /s/ Noah Ehrenpreis, Vice President 03/28/2022 Signature of Reporting Person Date EIF US Power IV, LLC By: Ares EIF Management, LLC, its managing member By: /s/ Noah Ehrenpreis, Vice President 03/28/2022 Signature of Reporting Person Date Ares EIF Management LLC By: /s/ Noah Ehrenpreis, Vice President 03/28/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On March 25, 2022, 14,942,643 Class A Units of LFG Acquisition Holdings LLC ("OpCo"), a subsidiary of Archaea Energy Inc. (the "Issuer"), held by Aria Renewable Energy Systems LLC ("Aria RES"), were redeemed on a one-for-one basis for 14,942,643 shares of Class A Common Stock of the Issuer (the "Class A Redemption Shares") pursuant to a Redemption Notice from Aria RES dated March 14, 2022 and 14,942,643 shares of the Issuer's Class B common stock, par value $0.0001 per share, held by Aria RES were surrendered to the Issuer and canceled. On March 25, 2022, the Class A Redemption Shares were sold by Aria RES pursuant to an underwritten public offering (the "Sale"). ( 2 )The Class A Redemption Shares are directly held by Aria RES. The Reporting Persons may be deemed to beneficially own, these shares by reason of the direct or indirect beneficial ownership of such shares, except as follows: (i) United States Power Fund III, L.P. ("USP Fund III") may be deemed to beneficially own 8,067,336 of these shares, (ii) EIF United States Power Fund IV, L.P. ("EIF USP Fund IV") may be deemed to beneficially own 6,875,307 of these shares, (iii) EIF US Power III, LLC may be deemed to beneficially own 8,067,336 of these shares, and (iv) EIF US Power IV, LLC may be deemed to beneficially own 6,875,307 of these shares. ( 3 )This statement is being filed jointly by (i) Aria RES, (ii) USP Fund III, (iii) EIF USP Fund IV (together with USP Fund III, the "Ares Funds"), (iv) EIFUS Power III, LLC, (v) EIF US Power IV, LLC, and (vi) Ares EIF Management LLC (collectively, the "Reporting Persons"). ( 4 )Aria RES is indirectly controlled by the Ares Funds. The general partner of USP Fund III is EIF US Power III, LLC, and the managing member of EIF US Power III, LLC is Ares EIF Management LLC. The general partner of EIF USP Fund IV is EIF US Power IV, LLC, and the managing member of EIF US Power IV, LLC is Ares EIF Management LLC. The sole member of Ares EIF Management LLC is Ares Management LLC. See Form 4 filed with the Securities and Exchange Commission by Ares Management LLC and certain other reporting persons on March 28, 2022. ( 5 )Each of the Reporting Persons (other than Aria RES with respect to the shares held directly), and the other directors, officers, partners, stockholders, member and managers of the Reporting Persons, expressly disclaims beneficial ownership of any equity securities of the Issuer, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purposes.

Remarks: Pursuant to the terms of the Stockholders' Agreement, dated September 15, 2021, by and among Aria RES, the Issuer and certain other stockholders party thereto, the Reporting Persons and certain other reporting persons had the right to designate one director for appointment or election to the Issuer's Board of Directors for so long as Aria RES, its affiliates and certain permitted transferees held at least 50% of the Registrable Securities (as defined in the Stockholders' Agreement) held by Aria RES on September 15, 2021. Aria RES designated Scott Parkes as a Board member. As a result of the Sale reported on this Form 4, Mr. Parkes' term as a member of the Issuer's Board automatically ended.

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).

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