Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

Shalennial Fund I, L.P.

2. Date of Event Requiring Statement (MM/DD/YYYY) 9/15/2021

3. Issuer Name and Ticker or Trading Symbol

Archaea Energy Inc. [LFG]

(Last) (First) (Middle)

102 EAST MAIN STREET, SECOND STORY

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director ___X___ 10% Owner
_____ Officer (give title below) _____ Other (specify below)

(Street)

CARNEGIE, PA 15106

(City) (State) (Zip)

5. If Amendment, Date Original Filed(MM/DD/YYYY)

6. Individual or Joint/Group Filing(Check Applicable Line)

_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class B Common Stock	5878310	D
Class B Common Stock	20010231	I	By Archaea Energy LLC ⁽¹⁾

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Units of LFG Acquisition Holdings LLC	⁽²⁾	⁽²⁾	Class A Common Stock	5878310	⁽²⁾	D
Class A Units of LFG Acquisition Holdings LLC	⁽²⁾	⁽²⁾	Class A Common Stock	20010231	⁽²⁾	I	By Archaea Energy LLC ⁽¹⁾

Explanation of Responses:
(1)	Archaea Energy LLC is majority-owned and controlled by the reporting person. As such, the reporting person may be deemed to have beneficial ownership of the securities held of record by Archaea Energy LLC. The reporting person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest it may have therein, directly or indirectly.
(2)	The Class A Units of LFG Acquisition Holdings LLC (together with the corresponding shares of the issuer's Class B common stock) are exchangeable into shares of the issuer's Class A common stock on a one-for-one basis and have no expiration date.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Shalennial Fund I, L.P. 102 EAST MAIN STREET, SECOND STORY CARNEGIE, PA 15106		X