Archaea Energy (LFG) 10-Q 15 Aug 22 2022 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2022	Aug. 01, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	001-39644
Entity Registrant Name	Archaea Energy Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	85-2867266
Entity Address, Address Line One	4444 Westheimer Road
Entity Address, Address Line Two	Suite G450
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77027
City Area Code	346
Local Phone Number	708-8272
Title of 12(b) Security	Class A Common Stock, par value $0.0001 per share
Trading Symbol	LFG
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Amendment Flag	false
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0001823766
Class A Units
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		80,717,757
Class B Units
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		39,060,418

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 213,315	$ 77,860
Restricted cash	21,864	15,206
Accounts receivable, net	29,841	37,010
Inventory	11,050	9,164
Prepaid expenses and other current assets	33,952	21,225
Total Current Assets	310,022	160,465
Property, plant and equipment, net	460,340	350,583
Intangible assets, net	627,223	638,471
Goodwill	29,835	29,211
Equity method investments	263,336	262,738
Operating lease right-of-use assets	4,654	0
Other non-current assets	17,113	9,721
Total Assets	1,712,523	1,451,189
Current Liabilities
Accounts payable - trade	38,272	11,096
Current portion of long-term debt, net	21,568	11,378
Current portion of operating lease liabilities	923	0
Accrued and other current liabilities	63,607	46,279
Total Current Liabilities	124,370	68,753
Total long-term debt, net	548,900	331,396
Derivative liabilities	52,730	67,424
Below-market contracts	135,210	142,630
Asset retirement obligations	4,830	4,677
Long-term operating lease liabilities	3,952	0
Other long-term liabilities	2,590	5,316
Liabilities	872,582	620,196
Commitments and Contingencies
Redeemable Noncontrolling Interests	606,608	993,301
Stockholders’ Equity
Preferred stock, $0.0001 par value; 10,000,000 authorized; none issued and outstanding	0	0
Additional paid in capital	392,118	0
Accumulated deficit	(158,797)	(162,320)
Total Stockholders’ Equity	233,333	(162,308)
Total Liabilities, Redeemable Noncontrolling Interests and Stockholders’ Equity	1,712,523	1,451,189
Class A Units
Stockholders’ Equity
Common stock	8	7
Class B Units
Stockholders’ Equity
Common stock	$ 4	$ 5

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2022	Dec. 31, 2021
Preferred stock, par value per share (in USD per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A Units
Common stock, par value per share (in USD per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	900,000,000	900,000,000
Common stock, shares issued (in shares)	80,717,757	65,122,200
Common stock, shares, outstanding (in shares)	80,717,757	65,122,200
Class B Units
Common stock, par value per share (in USD per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	190,000,000	190,000,000
Common stock, shares issued (in shares)	39,060,418	54,338,114
Common stock, shares, outstanding (in shares)	39,060,418	54,338,114

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2022		Jun. 30, 2021		Jun. 30, 2022	Jun. 30, 2021
Revenues and Other Income
Revenue		$ 74,450		$ 5,127		$ 128,580	$ 6,781
Amortization of intangibles and below-market contracts		2,769		0		5,537	0
Total revenues		77,219		5,127		134,116	6,781
Equity Investment Income, Net		2,693		0		4,122	0
Cost of Sales
Cost of energy		46,699		3,148		75,278	3,148
Cost of other revenues		2,317		1,199		3,940	2,360
Depreciation, amortization and accretion		13,730		886		26,219	935
Total Cost of Sales		62,746		5,233		105,437	6,443
General and administrative expenses		18,883		7,884		45,236	11,042
Operating Income (Loss)		(1,717)		(7,990)		(12,435)	(10,704)
Other Income (Expense)
Interest expense, net		(3,712)		(13)		(6,366)	(19)
Gain (loss) on warrants and derivative contracts		38,095		0		18,180	0
Other income (expense)		87		73		202	294
Total Other Income (Expense)		34,470		60		12,016	275
Income (Loss) Before Income Taxes		32,753		(7,930)		(419)	(10,429)
Income tax expense		129		0		129	0
Net income (loss)		32,624		(7,930)		(548)	(10,429)
Net income (loss) attributable to nonredeemable noncontrolling interests		0		(168)		0	(254)
Net income (loss) attributable to Legacy Archaea		0		(7,762)		0	(10,175)
Net income (loss) attributable to redeemable noncontrolling interests		10,674		$ 0		(4,071)	$ 0
Net income (loss) attributable to Class A Common shares - basic		$ 21,950				$ 3,523
Net income (loss) per Class A Common Stock:
Net income (loss) – basic (in usd per share)	[1]	$ 0.27		$ 0		$ 0.05	$ 0
Net income (loss) – diluted (in usd per share)		$ (0.18)		$ 0	[1]	$ (0.12)	$ 0	[1]
Weighted average shares of Class A Common Stock outstanding:
Basic (in shares)	[1]			0		73,488,555	0
Diluted (in shares)	[1]	83,445,455		0		76,203,753	0
Class A Units
Other Income (Expense)
Net income (loss) attributable to Class A Common shares - basic		$ 21,950		$ 0		$ 3,523	$ 0
Weighted average shares of Class A Common Stock outstanding:
Basic (in shares)		80,522,737	[1]	0		73,489,000	0
Diluted (in shares)		83,445,000		0		76,204,000	0
Energy revenue
Revenues and Other Income
Revenue		$ 71,235		$ 3,059		$ 124,151	$ 3,059
Other revenue
Revenues and Other Income
Revenue		$ 3,215		$ 2,068		$ 4,428	$ 3,722
[1]Class A Common Stock is outstanding beginning September 15, 2021 due to the reverse recapitalization transaction as described in “Note 4 - Business Combinations and Reverse Recapitalization.”

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Class A Units	Redeemable Noncontrolling Interests	Members’ Equity	Members’ Accumulated Deficit	Common Stock Class A Units	Common Stock Class B Units	Additional Paid-in Capital	Additional Paid-in Capital Class A Units	Accumulated Deficit	Nonredeemable Noncontrolling Interests
Beginning balance at Dec. 31, 2020			$ 0
Ending balance at Jun. 30, 2021			0
Beginning balance at Dec. 31, 2020	$ 31,491			$ 34,930	$ (4,156)	$ 0	$ 0	$ 0		$ 0	$ 717
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	178			178
Net income (loss)		$ 0
Net income (loss)	(10,429)				(10,175)						(254)
Members’ equity contributions	70			70
Ending balance at Jun. 30, 2021	21,310			35,178	(14,331)	0	0	0		0	463
Beginning balance at Mar. 31, 2021			0
Ending balance at Jun. 30, 2021			0
Beginning balance at Mar. 31, 2021	29,094			35,032	(6,569)	0	0	0		0	631
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	146			146
Net income (loss)		0
Net income (loss)	(7,930)				(7,762)						(168)
Ending balance at Jun. 30, 2021	21,310			35,178	(14,331)	0	0	0		0	463
Beginning balance at Dec. 31, 2021	993,301		993,301
Increase (Decrease) in Temporary Equity [Roll Forward]
Exchange of Class A Opco Units and Class B Common Stock for Class A Common Stock			(317,827)
Net income (loss)			(4,071)
Adjustment of redeemable noncontrolling interests to redemption amount			(64,795)
Ending balance at Jun. 30, 2022	606,608		606,608
Beginning balance at Dec. 31, 2021	(162,308)			0	0	7	5	0		(162,320)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Warrant exercises	1,555							1,555
Exchange of Class A Opco Units and Class B Common Stock for Class A Common Stock	317,827					1	(1)	317,827
Deferred tax impacts from exchange for Class A Common Stock transactions		780							$ 780
Share-based compensation expense	8,923							8,923
Shares withheld for taxes on net settled awards	(1,762)							(1,762)
Net income (loss)	3,523	3,523								3,523
Net income (loss)	(548)
Adjustment of redeemable noncontrolling interests to redemption amount	64,795							64,795
Ending balance at Jun. 30, 2022	233,333			0	0	8	4	392,118		(158,797)	0
Beginning balance at Mar. 31, 2022			861,448
Increase (Decrease) in Temporary Equity [Roll Forward]
Exchange of Class A Opco Units and Class B Common Stock for Class A Common Stock			(3,135)
Net income (loss)			10,674
Adjustment of redeemable noncontrolling interests to redemption amount			(262,379)
Ending balance at Jun. 30, 2022	606,608		$ 606,608
Beginning balance at Mar. 31, 2022	(58,660)			0	0	8	4	122,075		(180,747)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Warrant exercises	1,555							1,555
Exchange of Class A Opco Units and Class B Common Stock for Class A Common Stock	3,135							3,135
Deferred tax impacts from exchange for Class A Common Stock transactions		780							$ 780
Share-based compensation expense	3,170							3,170
Shares withheld for taxes on net settled awards	(976)							(976)
Net income (loss)	21,950	$ 21,950								21,950
Net income (loss)	32,624
Adjustment of redeemable noncontrolling interests to redemption amount	262,379							262,379
Ending balance at Jun. 30, 2022	$ 233,333			$ 0	$ 0	$ 8	$ 4	$ 392,118		$ (158,797)	$ 0

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net income (loss)	$ (548)	$ (10,429)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation, amortization and accretion expense	26,219	935
Amortization of debt issuance costs	1,404	14
Amortization of intangibles and below-market contracts	(2,206)	0
Bad debt expense	76	9
Return on investment in equity method investments	8,910	0
Equity in earnings of equity method investments	(4,122)	0
Total (gains) losses on derivatives, net	(18,180)	0
Net cash received (paid) in settlement of derivatives	(200)
Net cash received (paid) in settlement of derivatives		0
Forgiveness of Paycheck Protection Loan	0	(201)
Share-based compensation expense	8,923	179
Changes in operating assets and liabilities:
Accounts receivable	7,129	441
Inventory	(1,886)	0
Prepaid expenses and other current assets	2,737	(618)
Accounts payable - trade	17,974	1,961
Accrued and other liabilities	11,458	180
Other non-current assets	(969)	0
Other long-term liabilities	(27)	19
Net cash provided by (used in) operating activities	56,692	(7,510)
Cash flows from investing activities
Acquisition of Aria, net of cash acquired	1,876	0
Acquisition of assets and businesses	(7,013)	(31,527)
Additions to property, plant and equipment and progress payments	(127,889)	(56,609)
Contributions to equity method investments	(8,027)	0
Return of investment in equity method investments	7,422	0
Net cash used in investing activities	(133,631)	(88,136)
Cash flows from financing activities
Borrowings on line of credit agreement	0	8,578
Repayments on line of credit agreement	0	(1,522)
Proceeds from long-term debt, net of issuance costs	225,339	123,641
Repayments of long-term debt	(2,875)	(314)
Payment of acquisition contingent consideration	(1,650)	0
Capital contributions	0	70
Taxes paid on net share settled stock-based compensation awards	(1,762)	0
Net cash provided by financing activities	219,052	130,453
Net change in cash, cash equivalents and restricted cash	142,113	34,807
Cash, cash equivalents and restricted cash - beginning of period	93,066	1,496
Cash, cash equivalents and restricted cash - end of period	235,179	36,303
Supplemental cash flow information
Cash paid for interest	8,834	2,333
Non-cash investing activities
Accruals of property, plant and equipment and biogas rights incurred but not paid	$ 36,499	$ 10,965

Consolidated Statements of Op_2

Consolidated Statements of Operations - Predecessor - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Revenues and Other Income
Revenue	$ 5,127	$ 6,781
Amortization of intangibles and below-market contracts	0	0
Total revenues	5,127	6,781
Equity Investment Income, Net	0	0
Cost of Sales
Cost of energy	3,148	3,148
Cost of other revenues	1,199	2,360
Depreciation, amortization and accretion	886	935
Total Cost of Sales	5,233	6,443
General and administrative expenses	7,884	11,042
Operating Income (Loss)	(7,990)	(10,704)
Other Income (Expense)
Interest expense, net	(13)	(19)
Gain (loss) on warrants and derivative contracts	0	0
Other income (expense)	73	294
Total Other Income (Expense)	60	275
Net income (loss)	(7,930)	(10,429)
Energy revenue
Revenues and Other Income
Revenue	3,059	3,059
Aria Energy LLC
Revenues and Other Income
Revenue	42,017	84,508
Amortization of intangibles and below-market contracts	(954)	(1,908)
Total revenues	41,063	82,600
Equity Investment Income, Net	7,469	13,325
Cost of Sales
Cost of energy	20,016	41,116
Cost of other revenues	0	23
Depreciation, amortization and accretion	5,621	11,314
Total Cost of Sales	25,637	52,453
Gain on disposal of assets	(1,347)	(1,347)
Impairment of assets	(542)	0
General and administrative expenses	5,957	13,063
Operating Income (Loss)	18,827	31,756
Other Income (Expense)
Interest expense, net	(4,355)	(8,676)
Gain (loss) on warrants and derivative contracts	446	556
Gain on extinguishment of debt	61,411	61,411
Other income (expense)	2	2
Total Other Income (Expense)	57,504	53,293
Net income (loss)	76,331	85,049
Net income attributable to noncontrolling interest	281	289
Net Income Attributable to Controlling Interest	76,050	84,760
Aria Energy LLC | Energy revenue
Revenues and Other Income
Revenue	42,017	84,484
Aria Energy LLC | Construction revenue
Revenues and Other Income
Revenue	$ 0	$ 24

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - Predecessor - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Net income (loss)	$ (7,930)	$ (10,429)
Aria Energy LLC
Net income (loss)	76,331	85,049
Other Comprehensive Income
Net actuarial income	167	194
Other Comprehensive Income	76,498	85,243
Comprehensive income attributable to noncontrolling interest	281	289
Comprehensive Income Attributable to Controlling Interest	$ 76,217	$ 84,954

Consolidated Statement of Cashf

Consolidated Statement of Cashflows - Predecessor $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Cash flows from operating activities
Net income (loss)	$ (10,429)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation, amortization and accretion expense	935
Amortization of debt issuance costs	14
Return on investment in equity method investments	0
Total (gains) losses on derivatives, net	0
Changes in operating assets and liabilities:
Accounts receivable	441
Inventory	0
Prepaid expenses and other current assets	(618)
Other non-current assets	0
Accounts payable - trade	1,961
Accrued and other liabilities	180
Net cash provided by (used in) operating activities	(7,510)
Cash flows from investing activities
Additions to property, plant and equipment and progress payments	(56,609)
Net cash used in investing activities	(88,136)
Cash flows from financing activities
Net cash provided by financing activities	130,453
Net change in cash, cash equivalents and restricted cash	34,807
Cash, cash equivalents and restricted cash - beginning of period	1,496
Cash, cash equivalents and restricted cash - end of period	36,303
Aria Energy LLC
Cash flows from operating activities
Net income (loss)	85,049
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation, amortization and accretion expense	11,314
Gain on disposal of assets	(1,572)
Amortization of debt issuance costs	492
Amortization of intangibles and below-market contracts	685
Return on investment in equity method investments	12,166
Equity in earnings of equity method investments	(13,325)
Total (gains) losses on derivatives, net	(1,015)
Gain on extinguishment of debt	(61,411)
Net periodic benefit cost	61
Changes in operating assets and liabilities:
Accounts receivable	(6,143)
Inventory	(720)
Prepaid expenses and other current assets	115
Other non-current assets	106
Accounts payable - trade	269
Accrued and other liabilities	6,021
Net cash provided by (used in) operating activities	32,092
Cash flows from investing activities
Additions to property, plant and equipment and progress payments	(1,331)
Contributions to equity method investments	(6,630)
Net cash used in investing activities	(7,961)
Cash flows from financing activities
Payments on note payable and revolving credit agreement	(2,689)
Net cash provided by financing activities	(2,689)
Net change in cash, cash equivalents and restricted cash	21,442
Cash, cash equivalents and restricted cash - beginning of period	14,257
Cash, cash equivalents and restricted cash - end of period	35,699
Supplemental cash flow information
Cash paid for interest	4,403
Non-cash investing activities
Accruals of property and equipment incurred but not yet paid	$ 52

Organization and Description of

Organization and Description of Business	6 Months Ended
	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Description of Business	NOTE 1 - Organization and Description of Business Archaea Energy Inc. (“Archaea” or the "Company"), a Delaware corporation (formerly named Rice Acquisition Corp.), is one of the largest RNG producers in the U.S., with an industry-leading RNG platform primarily focused on capturing and converting waste emissions from landfills and livestock farms into low-carbon RNG and electricity. As of June 30, 2022, Archaea owns, through wholly-owned entities or joint ventures, a diversified portfolio of 32 LFG recovery and processing facilities across 18 states, including 13 operated facilities that produce pipeline-quality RNG and 19 LFG to renewable electricity production facilities, including one non-operated facility and one facility that is not operational. Archaea develops, designs, constructs, and operates RNG facilities. Archaea, through wholly-owned entities or joint ventures, has entered into long-term agreements with biogas site hosts which grant the rights to utilize gas produced at their sites and to construct and operate facilities on their sites to produce RNG and renewable electricity. On September 15, 2021, Archaea consummated the business combinations pursuant to (i) the Business Combination Agreement, dated April 7, 2021 (as amended, the “Aria Merger Agreement”), by and among Rice Acquisition Corp., a Delaware corporation (“RAC”), Rice Acquisition Holdings LLC, a Delaware limited liability company and direct subsidiary of RAC (“RAC Opco”), LFG Intermediate Co, LLC, a Delaware limited liability company and direct subsidiary of RAC Opco (“RAC Intermediate”), LFG Buyer Co, LLC, a Delaware limited liability company and direct subsidiary of RAC Intermediate (“RAC Buyer”), Inigo Merger Sub, LLC, a Delaware limited liability company and direct subsidiary of RAC Buyer (“Aria Merger Sub”), Aria Energy LLC, a Delaware limited liability company (“Aria”), and Aria Renewable Energy Systems LLC, a Delaware limited liability company, pursuant to which, among other things, Aria Merger Sub was merged with and into Aria, with Aria surviving the merger and becoming a direct subsidiary of RAC Buyer, on the terms and subject to the conditions set forth therein (the transactions contemplated by the Aria Merger Agreement, the “Aria Merger”), and (ii) the Business Combination Agreement, dated April 7, 2021 (as amended, the “Archaea Merger Agreement”), by and among RAC, RAC Opco, RAC Intermediate, RAC Buyer, Fezzik Merger Sub, LLC, a Delaware limited liability company and direct subsidiary of RAC Buyer (“Archaea Merger Sub”), Archaea Energy LLC, a Delaware limited liability company, and Archaea Energy II LLC, a Delaware limited liability company (“Legacy Archaea”), pursuant to which, among other things, Archaea Merger Sub was merged with and into Legacy Archaea, with Legacy Archaea surviving the merger and becoming a direct subsidiary of RAC Buyer, on the terms and subject to the conditions set forth therein (the transactions contemplated by the Archaea Merger Agreement, the “Archaea Merger” and, together with the Aria Merger, the “Business Combinations”). Legacy Archaea was determined to be the accounting acquirer of the Business Combinations, and Aria was determined to be the predecessor to the Company. Unless the context otherwise requires, the “Company,” “we,” “us,” and “our” refer, for periods prior to the completion of the Business Combinations, to Legacy Archaea and its subsidiaries and, for periods upon or after the completion of the Business Combinations, to Archaea Energy Inc. and its subsidiaries, including Legacy Archaea and Aria Energy LLC. Archaea has retained its “up-C” structure, whereby (i) all of the equity interests in Aria and Legacy Archaea are held indirectly by Opco through RAC Buyer and RAC Intermediate, (ii) Archaea’s only assets are its equity interests in Opco, and (iii) Sponsor, Atlas, the RAC independent directors, the Legacy Archaea Holders and the Aria Holders own or owned economic interests directly in Opco. In connection with the consummation of the Business Combinations, Rice Acquisition Holdings LLC was renamed LFG Acquisition Holdings LLC. In accordance with Accounting Standards Codification (“ASC”) 810 - Consolidation , Opco is considered a VIE with Archaea as its sole managing member and primary beneficiary. As such, Archaea consolidates Opco, and the remaining unitholders that hold economic interests directly in Opco are presented as redeemable noncontrolling interests on the Company’s financial statements. Subsequent to the Business Combinations, transactions impacting the ownership of Class A Opco Units resulted from warrant exercises, repurchases from Aria Renewable Energy Systems LLC, redemption of certain other Class A Opco Units in exchange for Class A Common Stock, and issuances related to vested restricted stock units (“RSUs”). The ownership structure of Opco upon closing of the Business Combinations and as of June 30, 2022, which gives rise to the redeemable noncontrolling interest at Archaea, is as follows: June 30, 2022 September 15, 2021 Equity Holder Class A Opco Units % Interest Class A Opco Units % Interest Archaea 80,717,757 67.4 % 52,847,195 45.9 % Total controlling interests 80,717,757 67.4 % 52,847,195 45.9 % Aria Holders — — % 23,000,000 20.0 % Legacy Archaea Holders 33,350,385 27.8 % 33,350,385 29.0 % Sponsor, Atlas and RAC independent directors 5,710,033 4.8 % 5,931,350 5.2 % Total redeemable noncontrolling interests 39,060,418 32.6 % 62,281,735 54.1 % Total 119,778,175 100.0 % 115,128,930 100.0 %

Basis of Presentation_and Summa

Basis of Presentation and Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	NOTE 2 - Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation These unaudited, interim, consolidated financial statements and notes are prepared in accordance with GAAP for interim reporting and in accordance with the rules and regulations of the SEC. These unaudited interim financial statements reflect all adjustments that are, in the opinion of management, necessary to present fairly the results for the interim periods presented. The Company’s accounting policies conform to GAAP and have been consistently applied in the presentation of financial statements. The Company’s consolidated financial statements include all wholly-owned subsidiaries and all VIEs with respect to which the Company determined it is the primary beneficiary. Certain information and disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted. Accordingly, these unaudited consolidated financial statements should be read in conjunction with the Company’s audited financial statements included in the 2021 Annual Report. The Archaea Merger with RAC was accounted for as a reverse recapitalization with Legacy Archaea deemed the accounting acquirer, and therefore, there was no step-up to fair value of any RAC assets or liabilities and no goodwill or other intangible assets were recorded. The Aria Merger was accounted for using the acquisition method of accounting with Aria deemed to be the acquiree for accounting purposes. The Company also determined that Aria is the Company’s predecessor and therefore has included the historical financial statements of Aria as predecessor beginning on page 32 . Principles of Consolidation As the Company completed its Business Combinations on September 15, 2021, these unaudited consolidated financial statements for the three and six months ended June 30, 2022 and as of December 31, 2021 include the assets, liabilities and results of operations of the combined results of the businesses of Legacy Archaea and Aria as operated by the Company after the Business Combinations; whereas, the unaudited results of operations for the three and six months ended June 30, 2021 are those of Legacy Archaea, the accounting acquirer. The Company has determined that Opco is a VIE and the Company is the primary beneficiary. Therefore, the Company consolidates Opco, and ownership interests of Opco not owned by the Company are reflected as redeemable noncontrolling interests due to certain features of the redemption right. See “Note 15 - Nonredeemable and Redeemable Noncontrolling Interest and Stockholders’ Equity.” Entities that are majority-owned by Opco are consolidated. Certain investments in entities are accounted for as equity method investments and included separately in the Company’s consolidated balance sheets. All intercompany balances and transactions have been eliminated. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, as well as contingent assets and liabilities. The estimates and assumptions used in the accompanying financial statements are based upon management’s evaluation of the relevant facts and circumstances as of the date of the financial statements. Actual results may differ from the estimates and assumptions used in preparing the accompanying consolidated financial statements. Revenue Recognition The Company generates revenues from the production and sales of RNG, Power, and associated Environmental Attributes, as well as from the performance of other landfill energy operations and maintenance (“O&M”) services. The Company also manufactures and sells customized pollution control equipment and performs associated maintenance agreement services. Prior to the January 1, 2022 adoption of ASC 842 - Leases as discussed in “Note 3 - Recently Issued and Adopted Accounting Standards,” a portion of the Company’s revenue was accounted for under ASC 840 - Leases and a portion under ASC 606 - Revenue from Contracts with Customers based on requirements of GAAP . Under ASC 840, lease revenue is recognized generally upon delivery of RNG and electricity. Under ASC 606 , revenue is recognized when (or as) the Company satisfies its performance obligation(s) under the contract by transferring the promised product or service either when (or as) its customer obtains control of the product or service, including RNG, electricity and their related Environmental Attributes. A performance obligation is a promise in a contract to transfer a distinct product or service to a customer. A contract’s transaction price is allocated to each distinct performance obligation. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring its products or services. Based on the terms of the related sales agreements, the amounts recorded under ASC 840 as lease revenue are generally consistent with revenue recognized under ASC 606. After the January 1, 2022 adoption of ASC 842, revenue is accounted for solely under ASC 606 as our facilities no longer meet the definition of leased assets under ASC 842. Business Combinations For business combinations that meet the accounting definition of a business, the Company determines and allocates the purchase price of an acquired company to the tangible and intangible assets acquired, the liabilities assumed, and noncontrolling interest, if applicable, as of the date of acquisition at fair value. Fair value may be estimated using comparable market data, a discounted cash flow method, or a combination of the two. In the discounted cash flow method, estimated future cash flows are based on management’s expectations for the future and can include estimates of future biogas production, commodity prices, operating and development costs, and a risk-adjusted discount rate. Revenues and costs of the acquired companies are included in the Company’s operating results from the date of acquisition. The Company uses its best estimates and assumptions as part of the purchase price allocation process to accurately value assets acquired and liabilities assumed at the acquisition date, and these estimates and assumptions are inherently uncertain and subject to refinement during the measurement period not to exceed one year from the acquisition date. As a result, any adjustment identified subsequent to the measurement period is included in operating results in the period in which the amount is determined. The Company’s acquisitions are discussed in “Note 4 - Business Combinations and Reverse Recapitalization.”

Recently Issued and Adopted Acc

Recently Issued and Adopted Accounting Standards	6 Months Ended
	Jun. 30, 2022
Accounting Changes and Error Corrections [Abstract]
Recently Issued and Adopted Accounting Standards	NOTE 3 – Recently Issued and Adopted Accounting Standards In February 2016, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, Leases (Topic 842), to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The main difference between previous generally accepted accounting principles and the new requirements under Topic 842 is the recognition of lease assets and lease liabilities by lessees for those leases with a term greater than 12 months classified as operating leases under previous GAAP. Upon adoption of Topic 842 as of January 1, 2022, the Company recognized $5.1 million of right-of-use (“ROU”) assets and lease liabilities on its consolidated balance sheet related to operating leases existing on the adoption date. Prior period financial statements were not adjusted. The adoption of Topic 842 did not have a material impact on the Company’s consolidated statement of operations or consolidated statement of cash flows. See “Note 11 - Leases” for additional information. In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (ASC 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting . ASU 2020-04 provides optional guidance for a limited period of time to ease the transition from the London Inter-Bank Offered Rate (“LIBOR”) to an alternative reference rate. The guidance intends to address certain concerns relating to accounting for contract modifications and hedge accounting. These optional expedients and exceptions to applying GAAP, assuming certain criteria are met, are allowed through December 31, 2022. The Company is currently evaluating the provisions of this update and has not yet determined whether it will elect the optional expedients. The Company does not expect the transition to an alternative rate to have a material impact on its business, operations or liquidity. In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers . ASU 2021-08 requires all entities to recognize and measure contract assets and liabilities in a business combination in accordance with Topic 606, Revenue from Contracts with Customers. The guidance aims to improve comparability for revenue contracts with customers by providing consistent recognition and measurement guidance for all revenue contracts with customers. ASU 2021-08 is effective for the Company for fiscal years beginning after December 15, 2022, with early adoption permitted. The Company will adopt this ASU as of January 1, 2023 and does not expect the adoption to have a material impact on its financial condition, results of operations, or cash flows.

Business Combinations and Rever

Business Combinations and Reverse Recapitalization	6 Months Ended
	Jun. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Business Combinations and Reverse Recapitalization	NOTE 4 – Business Combinations and Reverse Recapitalization Formation of the Lightning JV On May 5, 2022, the Company and Republic Services, Inc. (“Republic”) announced the formation of the Lightning JV to develop 39 RNG projects across the U.S. that will be located at various landfill sites owned or operated by Republic. The joint venture will develop and construct RNG facilities that will convert LFG into pipeline-quality RNG that can be used for a variety of applications. The Company holds a 60% ownership interest in the Lightning JV, and the Company’s initial capital funding of $222.5 million was paid into the Lightning JV on July 5, 2022. Concurrent with the initial funding, the Lightning JV completed the acquisition of landfill gas rights and underlying assets at an additional Republic-owned landfill for $37.9 million, bringing the total number of RNG development projects within the Lightning JV to 40. The Lightning JV did not conduct any activities impacting the financial results of the Company for the three and six months ended June 30, 2022. Reverse Recapitalization Legacy Archaea is considered the accounting acquirer of the Business Combinations because the Legacy Archaea Holders have the largest portion of the voting power of the Company and Legacy Archaea’s senior management comprise the majority of the executive management of the Company. Additionally, the Legacy Archaea Holders appointed the majority of board members exclusive of the independent board members. The Archaea Merger represents a reverse merger and is accounted for as a reverse recapitalization in accordance with GAAP. Under this method of accounting, RAC is treated as the “acquired” company for financial reporting purposes. Accordingly, for accounting purposes, the Archaea Merger is treated as the equivalent of Legacy Archaea issuing shares for the net assets of RAC, accompanied by a recapitalization. The net assets of RAC were stated at historical cost, no goodwill or other intangible assets were recorded. Aria Merger As discussed in “Note 1 - Organization and Description of Business,” Aria was acquired as part of the Business Combinations consummated on September 15, 2021 to complement the Company’s existing RNG assets and for its operational expertise in the renewable gas industry. The Aria Merger represented an acquisition of a business and was accounted for using the acquisition method, whereby all of the assets acquired and liabilities assumed were recognized at their fair value on the acquisition date, with any excess of the purchase price over the estimated fair value recorded as goodwill. As of June 30, 2022, the Company has completed the allocation of the consideration. During the six months ended June 30, 2022, the final consideration adjustment of $1.9 million was determined and received from the Aria Holders which had the effect of reducing goodwill. In addition, other purchase price adjustments of $2.5 million in the aggregate were recorded for the six months ended June 30, 2022 which had the effect of increasing goodwill.

Revenues

Revenues	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenues	NOTE 5 – Revenues The following table disaggregates revenue by significant product type and operating segment for the three and six months ended June 30, 2022 and 2021: Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2022 2021 2022 2021 Revenue by Product Type RNG, including RINs and LCFS credits $ 55,086 $ 821 $ 89,883 $ 821 RNG O&M service (1) 242 — 532 — Power, including RECs 14,893 2,238 31,759 2,238 Power O&M service (1) 953 — 1,851 — Equipment and associated services 2,808 2,068 4,022 3,722 Other (1) 468 — 533 — Total $ 74,450 $ 5,127 $ 128,580 $ 6,781 Revenue by Operating Segment RNG $ 55,328 $ 821 $ 90,415 $ 821 Power 15,846 2,238 33,610 2,238 Corporate and Other 3,276 2,068 4,555 3,722 Total $ 74,450 $ 5,127 $ 128,580 $ 6,781 _____________________________________________ (1) Includes revenues earned from the Company’s joint ventures, see “Note 20 - Related Party Transactions.” Contract Assets and Contract Liabilities The timing of revenue recognition may differ from the timing of invoicing to customers. Contract assets include unbilled amounts from equipment sales projects when revenues recognized under the cost-to-cost measure of progress exceed the amounts invoiced to customers, as the amounts cannot be billed under the terms of the contracts. There were no credit allowances for contract assets as of June 30, 2022 or December 31, 2021. Contract liabilities from contracts arise when amounts invoiced to customers exceed revenues from equipment sales recognized under the cost-to-cost measure of progress. Contract liabilities additionally include advanced payments from customers on certain equipment contracts. Contract liabilities decrease as revenue is recognized from the satisfaction of the related performance obligation and are recorded as either current or long-term, depending upon when such revenue is expected to be recognized. Contract assets and liabilities consisted of the following as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Contract assets (included in Prepaid expenses and other current assets) $ 168 $ 87 Contract liabilities (included in Accrued and other current liabilities) $ (270) $ (505) The decrease in contract liabilities during the six months ended June 30, 2022 was primarily due to the timing of milestone billings along with revenues recognized that were included in December 31, 2021 contract liabilities. Costs to Obtain Customer Contracts The Company recognizes an asset for the incremental costs of obtaining a contract with a customer when the economic benefit and amortization period exceeds one year. Only those costs that are directly related to the acquisition of customer contracts and that would not have been incurred if the customer contract had not been obtained are deferred as assets. As of June 30, 2022, $2.5 million was recorded for costs to obtain customer contracts and included in other non-current assets on the Company’s consolidated balance sheet. Amortization will begin when the related contract commences. Transaction Price Allocated to Remaining Unsatisfied Performance Obligations Remaining unsatisfied performance obligations as of June 30, 2022 relate to certain of the Company’s RNG and Environmental Attributes contracts. The Company applies the optional exemptions in ASC 606 and does not disclose consideration for remaining performance obligations with an original expected duration of one year or less or for variable consideration related to unsatisfied performance obligations. Firm contracts for fixed-price, fixed-quantity sales of RNG and Environmental Attributes based on minimum contractual volumes are reflected in the table below when their original expected term is in excess of one year. The following table summarizes the revenue the Company expects to recognize over next 21 years on these firm sales contracts as of June 30, 2022: (in thousands) Remainder of 2022 $ 42,026 2023-2024 262,001 2025-2026 429,996 2027-2028 441,067 2029-2030 434,641 2031-2032 418,453 Thereafter 1,871,603 Total $ 3,899,787

Property, Plant, and Equipment

Property, Plant, and Equipment	6 Months Ended
	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	NOTE 6 – Property, Plant and Equipment Property, plant and equipment consist of the following as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Machinery and equipment $ 307,808 $ 285,718 Buildings and improvements 17,517 16,039 Furniture and fixtures 2,326 1,176 Construction in progress (1) 151,496 55,039 Land 266 246 Total cost 479,413 358,218 Less accumulated depreciation (19,073) (7,635) Property, plant and equipment, net $ 460,340 $ 350,583 _____________________________________________ (1) Includes both acquired long-lead equipment and projects in progress.

Equity Method Investments

Equity Method Investments	6 Months Ended
	Jun. 30, 2022
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	NOTE 7 – Equity Method Investments As a result of the Aria Merger, the Company holds 50% interest in two joint ventures, Mavrix, LLC (“Mavrix”) and Sunshine Gas Producers, LLC (“SGP”), which are accounted for using the equity method due to the joint control by both the Company and unrelated parties with ownership interest in each entity. Under the terms of the original Mavrix, LLC Contribution Agreement dated September 30, 2017, the Company is required to make an earn-out payment to its joint venture partner holding the other 50% membership in Mavrix in an amount up to $9.55 million. The earn-out payment represents additional consideration for the Company’s equity interest in Mavrix and will be based on the performance of certain projects owned by Mavrix through the earn-out period which ends September 30, 2022. No earn-out payment is due until the completion of the earn-out period. In February 2022, the Mavrix, LLC Contribution Agreement was amended to exclude certain upgrade and optimization capital expenditures incurred for one specific project from the earn-out calculation and to add a maintenance expenditure cap. Based on the amended terms, the Company has estimated the earn-out payment to be $8.3 million at June 30, 2022, and this amount is reflected in the accompanying balance sheet in accrued and other current liabilities. The summarized financial information for the Mavrix and SGP equity method investments is as follows: (in thousands) June 30, 2022 December 31, 2021 Assets $ 225,978 $ 203,864 Liabilities 51,873 15,477 Net assets $ 174,105 $ 188,387 Company’s share of equity in net assets $ 87,052 $ 94,194 (in thousands) Three Months Ended June 30, 2022 Six Months Ended June 30, 2022 Total revenues $ 26,797 $ 52,025 Net income $ 10,419 $ 18,436 Company’s share of net income $ 5,209 $ 9,218 The Company’s carrying values of the Mavrix and SGP investments also include basis differences totaling $154.5 million as of June 30, 2022 as a result of the fair value measurements recorded as part of the Aria Merger. Amortization of the basis differences reduced equity investment income by $2.6 million and $5.1 million for the three and six months ended June 30, 2022, respectively. On December 30, 2021, the Company entered into a new joint venture. The Company contributed $7.5 million in cash in 2021 into this newly created entity, Saturn Renewables LLC ("Saturn"), in exchange for a 50% interest, and the joint venture acquired gas rights at two landfill sites to develop RNG facilities. The Company is the operator of Saturn’s day-to-day operations and accounts for its investment in Saturn using the equity method. The Company has contributed an additional $8.0 million to the Saturn joint venture during the six months ended June 30, 2022, and the carrying value of Saturn was $15.5 million as of June 30, 2022.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	NOTE 8 – Goodwill and Intangible Assets Goodwill At June 30, 2022, the Company had $29.8 million of goodwill, all of which is allocated to the RNG segment. The goodwill is primarily associated with the acquisition of Aria in the Business Combinations, as discussed in “Note 4 - Business Combinations and Reverse Recapitalization.” The Company performs its annual impairment testing on October 1 of each year or as circumstances change or necessitate. There have been no material changes related to the RNG segment's goodwill or the Company’s impairment assessments since its fiscal year ended December 31, 2021. Intangible Assets Intangible assets consist of biogas rights agreements, off-take agreements, O&M contracts, an RNG purchase contract, customer relationships and trade names that were recognized as a result of the allocation of the purchase price under business acquisitions based on their future value to the Company, and such intangible assets will be amortized over their estimated useful lives. Biogas rights agreements also include the cost of agreements entered into with biogas site hosts. The biogas rights agreements have various renewal terms in their underlying contracts that are factored into the useful lives when amortizing the intangible asset. Intangible assets consist of the following as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 Gross Carrying Amount Accumulated Amortization Net Biogas rights agreements $ 612,461 $ 22,814 $ 589,647 Electricity off-take agreements 26,511 2,344 24,167 O&M contracts 8,620 460 8,160 RNG purchase contract 10,290 5,291 4,999 Trade names and customer relationships 500 250 250 Total $ 658,382 $ 31,159 $ 627,223 (in thousands) December 31, 2021 Gross Carrying Amount Accumulated Amortization Net Biogas rights agreements $ 603,868 $ 8,237 $ 595,631 Electricity off-take agreements 26,511 749 25,762 O&M contracts 8,620 173 8,447 RNG purchase contract 10,290 1,959 8,331 Trade names and customer relationships 500 200 300 Total $ 649,789 $ 11,318 $ 638,471 Total amortization expense was appro ximately $8.3 million and $16.5 million for the three and six months ended June 30, 2022, respectively, and $25 thousand and $50 thousand for the three and six months ended June 30, 2021, respectively, excluding the $1.7 million and $3.3 million of amortization of the RNG purchase contract for the three and six months ended June 30, 2022, respectively, that is amortized to cost of energy. Below-Market Contracts As a result of the Aria Merger, the Company assumed certain fixed-price sales contracts that were below current and future market prices at the Closing Date. The contracts were recorded at fair value and are classified as other long-term liabilities on the Company’s consolidated balance sheets as of June 30, 2022 and December 31, 2021: June 30, 2022 Gross Liability Accumulated Amortization Net Gas off-take agreements $ 146,990 $ 11,780 $ 135,210 December 31, 2021 Gross Liability Accumulated Amortization Net Gas off-take agreements $ 146,990 $ 4,360 $ 142,630

Accrued and Other Current Liabi

Accrued and Other Current Liabilities	6 Months Ended
	Jun. 30, 2022
Payables and Accruals [Abstract]
Accrued and Other Current Liabilities	NOTE 9 – Accrued and Other Current Liabilities Accrued and other current liabilities consist of the following as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Accrued expenses $ 30,377 $ 16,638 Accrued capital expenditures 22,760 16,609 Derivative liabilities 55 771 Payroll and related costs 6,875 7,683 Accrued interest 70 738 Contract liabilities 270 505 Other current liabilities 3,200 3,335 Total $ 63,607 $ 46,279

Debt

Debt	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Debt	NOTE 10 – Debt Credit Agreement Amendment On June 30, 2022, the Company amended its Revolving Credit and Term Loan Agreement which included a senior secured revolving credit facility (the “Revolver”) with an initial commitment of $250 million and a senior secured term loan credit facility (the “Term Loan”) with an initial commitment of $220 million. The amendment, among other things, increased the aggregate total commitment from the original syndicate of lenders plus two additional lenders by approximately $630 million to a total of $1.1 billion, and provides for a $400 million Term Loan and a $700 million Revolver (together, the “Credit Facilities”). In addition, on June 1, 2022, the benchmark interest rate was revised to the secured overnight financing rate (“SOFR”) plus 2.75% for the Revolver and SOFR plus 3.25% for the Term Loan. The maturity date of the Credit Facilities remains unchanged at September 15, 2026. The Company had outstanding borrowings under the Term Loan of $400.0 million at an interest rate of 4.89% and under the Revolver of $50.0 million at an interest rate of 4.39% as of June 30, 2022. The Company had issued letters of credit under the Credit Facilities of $23.8 million, resulting in available borrowing capacity of $626.2 million under the Revolver as of June 30, 2022. The Company’s outstanding debt consists of the following as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Credit Agreement, as amended - Term Loan $ 400,000 $ 218,625 Credit Agreement, as amended - Revolver 50,000 — Wilmington Trust – 4.47% Term Note 60,828 60,828 Wilmington Trust – 3.75% Term Note 69,667 72,542 580,495 351,995 Less unamortized debt issuance costs (10,027) (9,221) Long-term debt less debt issuance costs 570,468 342,774 Less current maturities, net (21,568) (11,378) Total long-term debt, net $ 548,900 $ 331,396 Scheduled future maturities of long-term debt principal amounts are as follows: (in thousands) Remainder of 2022 $ 10,502 2023 26,108 2024 26,371 2025 26,598 2026 and thereafter 490,916 Total $ 580,495 Fair Value of Debt The Company estimates the fair value of fixed-rate term loans based on quoted market yields for similarly rated debt instruments in an active market, which are considered a Level 2 input in the fair value hierarchy . As of June 30, 2022 and December 31, 2021, the estimated fair value of the Company’s outstanding debt was approximately $523.0 million and $353.1 million, respectively.

Leases

Leases	6 Months Ended
	Jun. 30, 2022
Leases [Abstract]
Leases	NOTE 11 – Leases The Company has entered into warehouse, facility, and various office leases with third parties for periods ranging from one Leases on January 1, 2022 utilizing the modified retrospective approach. The Company has elected the package of practical expedients, which allows the Company not to reassess (1) whether any expired or existing contracts as of the adoption date are or contain leases, (2) lease classification for any expired or existing leases as of the adoption date, and (3) initial direct costs for any existing leases as of the adoption date. The Company has elected not to recognize ROU assets and lease liabilities for leases with terms of 12 months or less. The Company determines at the inception of a lease whether an arrangement that provides the Company control over the use of an asset is a lease. ROU assets and lease liabilities are initially measured at the lease commencement date based on the present value of the future lease payments over the lease term, discounted using an estimate of the Company’s incremental borrowing rate which approximates the rate to borrow funds on collateralized loans over a similar term of the lease. Renewal options are included in the calculation of ROU assets and lease liabilities when the Company determines that the option is reasonably certain of exercise based on an analysis of the relevant facts and circumstances. When operating leases contain provisions for maintenance services, which are considered non-lease components for accounting purposes, those non-lease components are excluded from the calculation of the ROU assets and lease liabilities. Operating lease expense is generally recognized on a straight-line basis over the lease term unless another method better represents the pattern that benefit is expected to be derived from the right to use the underlying asset. For the three and six months ended June 30, 2022, the Company recognized total lease costs of $0.8 million and $1.6 million, respectively, which was comprised of $0.3 million and $0.7 million, respectively, in operating lease costs for ROU assets, and $0.4 million and $0.9 million, respectively, of short-term operating lease expense. For the three and six months ended June 30, 2021, the Company recognized rent expense of $0.3 million and $0.4 million, respectively. The Company also entered into a related-party office lease as a result of its acquisition of an interest in Gulf Coast Environmental Services, LLC in 2020. During the three and six months ended June 30, 2022, the Company recognized rent expense of zero and $70 thousand, respectively, under this related-party lease which expired on May 1, 2022. For the three and six months ended June 30, 2021, the Company recognized rent expense of $53 thousand and $105 thousand, respectively, under this related-party lease. Supplemental information related to the Company’s ROU assets and related operating lease liabilities were as follows: (in thousands) Six Months Ended June 30, 2022 Operating cash outflows for operating leases $ 1,346 Weighted average remaining lease term (in years) 8.9 Weighted average discount rate 5.0 % In 2021, the Company entered into a new corporate office lease with a commitment of approximately $8.3 million that has not commenced as of June 30, 2022 and, therefore, has not been recognized on the Company’s consolidated balance sheet. This operating lease is expected to commence in the first half of 2023 with a lease term of 11 years. As of June 30, 2022, future lease payments under the Company’s operating leases that have commenced are as follows: (in thousands) Remainder of 2022 $ 602 2023 625 2024 609 2025 589 2026 533 2027 546 Thereafter 2,576 Total future lease payments 6,080 Less portion representing imputed interest (1,205) Total operating lease liabilities $ 4,875

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 12 – Commitments and Contingencies Commitments The Company has various long-term contractual commitments pertaining to its biogas rights agreements. Excluding the evergreen contracts, these agreements expire at various dates through 2045. Contingencies The Company is subject to certain claims, charges and litigation concerning matters arising in the ordinary course of business and that have not been fully resolved. The Company does not believe the ultimate outcome of any currently pending lawsuit will have a material adverse effect upon the Company’s financial statements, and the potential liability is believed to be only reasonably possible or remote.

Derivative Instruments

Derivative Instruments	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	NOTE 13 – Derivative Instruments Warrant Liabilities In June 2022, 234,399 Private Placement Warrants were exercised on cashless basis at an exercise price of $11.50 per share in exchange for a total of 100,009 shares of Class A Common Stock. As of June 30, 2022, 6,536,601 Private Placement Warrants remain outstanding, and each is exercisable to purchase one share of Class A Common Stock or, in certain circumstances, one Class A Opco Unit and corresponding share of Class B Common Stock. The Private Placement Warrants expire on September 15, 2026, or earlier upon redemption or liquidation. Private Placement Warrants are nonredeemable so long as they are held by the initial purchasers or their permitted transferees. The outstanding Private Placement Warrants continue to be held by the initial purchasers or their permitted transferees as of June 30, 2022. The Private Placement Warrants contain exercise and settlement features that preclude them from being classified within stockholders’ equity, and therefore are recognized as derivative liabilities. The Company recognizes the warrant instruments as liabilities at fair value with changes in fair value included within gain (loss) on warrants and derivative contracts in the Company’s consolidated statements of operations. Derivative warrant liabilities are classified as non-current liabilities as their liquidation is not reasonably expected to require the use of current assets or require the creation of current liabilities. The fair value of the Private Placement Warrants is estimated using the Black-Scholes option pricing model (a Level 3 measurement). The Company used the following assumptions to estimate the fair value of the Private Placement Warrants: June 30, 2022 December 31, 2021 Stock price $ 15.53 $ 18.28 Exercise price $ 11.50 $ 11.50 Volatility 49.5 % 46.0 % Expected term (years) 4.2 4.7 Risk-free interest rate 3.0 % 1.2 % The change in the fair value of the warrant liabilities is recognized in gain (loss) on warrants and derivative contracts in the consolidated statement of operations. The changes in the warrant liabilities for the six months ended June 30, 2022 are as follows: (in thousands) Warrant liabilities as of December 31, 2021 $ 67,290 Change in fair value (13,004) Less fair value of warrants exercised (1,556) Warrant liabilities as of June 30, 2022 $ 52,730 Natural Gas Swap In conjunction with the Business Combinations, the Company assumed a natural gas variable to fixed priced swap agreement entered into by Aria. The Company is the fixed price payer under the swap agreement that provides for monthly net settlements through the termination date of June 30, 2023. The agreement was intended to manage the risk associated with changing commodity prices. The agreement has a remaining notional of 219,000 MMBtu as of June 30, 2022. Changes in the fair values and realized gains (losses) for the natural gas swap are recognized in gain (loss) on warrants and derivative contracts in the consolidated statement of operations. Valuation of the natural gas swap was calculated by discounting future net cash flows that were based on a forward price curve for natural gas over the remaining life of the contract (a Level 2 measurement), with an adjustment for each counterparty’s credit rate risk. Interest Rate Swap In December 2021, the Company entered into an interest rate swap that locks in payments of a fixed interest rate of 1.094% in exchange for a floating interest rate that resets monthly based on LIBOR. The interest rate swap was not designated as a hedging instrument, and net gains and losses are recognized currently in gain (loss) on warrants and derivative contracts. The interest rate swap notional was $107.9 million as of June 30, 2022 and declines over the term of the swap to $94.9 million at the December 2024 contract termination date. The following summarizes the balance sheet classification and fair value of the Company’s derivative instruments as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Prepaid expenses and other current assets Natural gas swap asset $ 245 $ — Interest rate swap asset 1,906 — Other non-current assets Interest rate swap asset 2,814 439 Total derivative assets $ 4,965 $ 439 Accrued and other current liabilities Natural gas swap liability $ 55 $ 44 Interest rate swap liability — 727 Derivative liabilities Natural gas swap liability — 134 Warrant liabilities 52,730 67,290 Total derivative liabilities $ 52,785 $ 68,195 The following table summarizes the income statement effect of gains and losses related to warrants and derivative instruments for the three and six months ended June 30, 2022 and 2021: Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2022 2021 2022 2021 Gain (loss) on natural gas swap contract $ 116 $ — $ 570 $ — Gain (loss) on interest rate swap contract 963 — 4,606 — Gain (loss) on warrant liabilities 37,016 — 13,004 — Total $ 38,095 $ — $ 18,180 $ —

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE 14 – Fair Value Measurements Fair Values - Recurring The following table summarizes the outstanding derivative instruments and the fair value hierarchy for the Company’s derivative assets and liabilities that are required to be measured at fair value on a recurring basis: (in thousands) Level 1 Level 2 Level 3 Total Fair Value June 30, 2022 Assets Natural gas swap $ — $ 245 $ — $ 245 Interest rate swap — 4,720 — 4,720 Liabilities Natural gas swap $ — $ 55 $ — $ 55 Warrant liabilities — — 52,730 52,730 (in thousands) Level 1 Level 2 Level 3 Total Fair Value December 31, 2021 Assets Interest rate swap $ — $ 439 $ — $ 439 Liabilities Natural gas swap $ — $ 178 $ — $ 178 Interest rate swap — 727 — 727 Warrant liabilities — — 67,290 67,290 Financial Instruments Fair Value As of June 30, 2022 and December 31, 2021, the fair value of other financial instruments including cash and cash equivalents, prepaid expenses, accounts payable, and accrued and deferred expenses approximate the carrying values because of the short-term maturity of those items. See “Note 10 - Debt” for the fair value of the Company’s debt. Fair Values - Nonrecurring The fair value measurements of goodwill, assets acquired and liabilities assumed, including below-market contracts assumed, in the business combinations are measured on a nonrecurring basis on the acquisition date based on inputs that are not observable in the market, and therefore, represent Level 3 inputs and measurements. See “Note 8 - Goodwill and Intangible Assets” and “Note 4 - Business Combinations and Reverse Recapitalization.” There were no transfers between fair value hierarchy levels for the six months ended June 30, 2022 and the year ended December 31, 2021.

Nonredeemable and Redeemable No

Nonredeemable and Redeemable Noncontrolling Interest and Stockholders’ Equity	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Nonredeemable and Redeemable Noncontrolling Interest and Stockholders’ Equity	NOTE 15 – Nonredeemable and Redeemable Noncontrolling Interest and Stockholders’ Equity Redeemable Noncontrolling Interest The redeemable noncontrolling interest relates to Class A Opco Units, including units issued in connection with the Business Combinations and units owned by the Sponsor (or their transferees), Atlas or the Company’s directors. As of June 30, 2022, the Company directly owned approximately 67.4% of the interest in Opco and the redeemable noncontrolling interest was 32.6%. As of December 31, 2021, the Company owned approximately 54.5% of the interest in Opco and the redeemable noncontrolling interest was 45.5%. Holders of Class A Opco Units other than Archaea own an equal number of shares of Class B Common Stock and have a redemption right, subject to certain limitations, to redeem Class A Opco Units and a corresponding number of shares of Class B Common Stock for, at Opco’s option, (i) shares of Class A Common Stock on a one-for-one basis, subject to adjustment for stock splits, stock dividends, reorganizations, recapitalizations and the like, or (ii) a corresponding amount of cash. Due to the cash redemption provisions of the redemption right, the Company has accounted for the redeemable noncontrolling interest as temporary equity. Stockholders’ Equity In March 2022, the Company supported an underwritten public offering in which Aria Renewable Energy Systems LLC sold 14,942,643 shares of our Class A Common Stock (the “Ares Secondary Offering”). The Ares Secondary Offering resulted in no proceeds to the Company and a decrease of 14,942,643 shares of outstanding Class B Common Stock and a corresponding increase of 14,942,643 shares of outstanding Class A Common Stock. The following is a summary of Class A Common Stock and Class B Common Stock activity for the six months ended June 30, 2022: (in shares) Class A Common Stock Class B Common Stock Balance at December 31, 2021 65,122,200 54,338,114 Issued for warrant exercises 100,009 — Exchange of Class B Common Stock for Class A Common Stock 15,277,696 (15,277,696) Issued for vested RSUs 217,852 — Outstanding at June 30, 2022 80,717,757 39,060,418

Share-Based Compensation

Share-Based Compensation	6 Months Ended
	Jun. 30, 2022
Share-based Payment Arrangement [Abstract]
Share-Based Compensation	NOTE 16 – Share-Based Compensation In connection with Business Combinations, the Company adopted the 2021 Omnibus Incentive Plan (the “Plan”). The Company may grant restricted stock, RSUs, incentive and non-qualified stock options, stock appreciation rights, performance awards, stock awards and other stock-based awards to officers, directors, employees and consultants under the terms of the Plan. There are 11.3 million shares authorized under the plan and approximately 9.6 million shares remain available for future issuance as of June 30, 2022. The Company determines the grant-date fair value of its RSUs using the fair market value of its stock on the grant date, unless the awards are subject to market-based vesting conditions, in which case the Company utilizes a Monte Carlo simulation model to determine the grant-date fair value. The Company recognizes compensation expense equal to the grant-date fair value for all equity awards that are expected to vest. This expense is recognized as compensation expense on a straight-line basis over the requisite service period, which is the vesting period. The Company has elected to account for forfeitures of awards granted under the Plan as they occur in determining compensation expense. Restricted Stock Units In January 2022, the Company granted a total of 41,028 RSUs to non-employee directors with a one-year vesting period. These RSUs will be subject to forfeiture restrictions and cannot be sold, transferred, or disposed of during the restriction period. In February 2022, the Company modified and accelerated the vesting of 158,583 unvested RSUs for certain employees and recognized $2.9 million of incremental share-based compensation expense related to these modifications. During the three months ended June 30, 2022, the Company granted a total of 666,677 RSUs to its executives and other employees, and these RSUs generally vest over a three-year period. These RSUs will be subject to forfeiture restrictions and cannot be sold, transferred, or disposed of during the restriction period. The table below summarizes RSU activity for the six months ended June 30, 2022: RSUs Weighted- Average Grant Date Fair Value (per unit) Outstanding at December 31, 2021 851,020 $ 17.23 Granted 707,705 $ 22.22 Vested (1) (316,903) $ 17.23 Forfeited (164,004) $ 18.29 Outstanding at June 30, 2022 1,077,818 $ 20.35 __________________________________________ (1) Vested RSUs include 85,922 units that were not converted into Class A Common Stock due to net share settlements to cover employee withholding taxes. For the three and six months ended June 30, 2022, the Company recognized a total of $2.4 million and $8.2 million, respectively, of share-based compensation expense related to RSUs, including $2.9 million of incremental share-based compensation expense for the February 2022 modifications. There was no share-based compensation expense recognized related to RSUs for the three and six months ended June 30, 2021 and no unrecognized share-based compensation expense related to unvested RSUs as of June 30, 2021. At June 30, 2022, there was $19.1 million of unrecognized share-based compensation expense related to unvested RSUs, which is expected to be recognized over a weighted average period of approximately 1.6 years. Performance-Based RSUs In April and May 2022, the Company granted a total of 364,117 performance-based RSUs (“PSUs”) to its senior executives and certain other high-level employees. Each grant award reflects a target number of PSUs that may be issued to the award recipient. These PSUs vest on March 1, 2025 following the completion of a three-year performance period ending December 31, 2024. The performance criteria consist of the market-based Absolute Total Shareholders Return (“ATSR”) and the performance-based Average Cash Return on Investment (“ACRI”). Depending on the results achieved during the three-year performance period, the actual number of PSUs that an award recipient receives at the end of the vesting period may range from 0% to 200% of the target PSUs granted. Estimates of grant-date fair value of these PSUs may not accurately predict the value ultimately realized by the employees who received the awards, and the ultimate value may not be indicative of the reasonableness of the original estimates of fair value made by the Company. The fair value of the ATSR market-based performance objective was determined using Monte Carlo simulations with the following weighted-average assumptions: Stock price $ 22.67 Volatility 49.0 % Risk-free interest rate 2.6 % Grant date fair value per target ATSR PSU $ 28.53 Separately, based on a subjective assessment of our future financial performance over the performance period, the Company determines quarterly the probable level of performance for the ACRI criteria. The Company starts recording compensation expense when the ACRI become probable of achievement. Based on the Company’s subjective assessment as of June 30, 2022, the 100% payout rate of ACRI performance is probable of being achieved; accordingly, the Company recognized expense based on the target level. The table below summarizes PSU activity for the six months ended June 30, 2022: PSUs Weighted- Average Grant Date Fair Value (per unit) Outstanding at December 31, 2021 — $ — Granted 364,117 $ 26.75 Forfeited (12,580) $ 26.84 Outstanding at June 30, 2022 351,537 $ 26.75 For the three and six months ended June 30, 2022, the Company recognized a total of $0.8 million share-based compensation expense related to these PSUs. At June 30, 2022, there was $8.6 million of unrecognized compensation expense related to unvested PSUs, which is expected to be recognized over a weighted-average period of approximately 2.7 years . Series A Incentive Plan Legacy Archaea adopted a Series A Incentive Plan in 2018 to provide economic incentives to select employees and other service providers in order to align their interests with equity holders of Legacy Archaea. Under the original terms of the awards, all unvested Series A units outstanding were vested upon Closing of Business Combinations. For the three and six months ended June 30, 2021, Legacy Archaea recognized compensation expense of $0.1 million and $0.2 million, respectively, related to Series A units awards. As a result of the Business Combinations, the Series A Incentive Plan is no longer applicable to the Company.

Provision for Income Tax

Provision for Income Tax	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Provision for Income Tax	NOTE 17 – Provision for Income Tax Archaea Energy Inc. is organized as a Subchapter C corporation and, as of June 30, 2022, is a 67.4% owner of LFG Acquisition Holdings LLC. LFG Acquisition Holdings LLC is organized as a limited liability company and treated as a partnership for U.S. federal and most applicable state and local income tax purposes and, as such, is generally not subject to any U.S. federal and state entity-level income taxes with the exception of two subsidiary Subchapter C corporations and certain limited state jurisdictions. The Company recognized federal and state income tax expense of $0.1 million for both the three and six months ended June 30, 2022. The Company did not record a tax provision for the three and six months ended June 30, 2021 primarily due to Archaea Energy LLC's status as a pass-through entity for U.S. federal income tax purposes. The effective tax rates were 0% and (23.6)% for the three and six months ended June 30, 2022, respectively, and 0% for both the three and six months ended June 30, 2021. The difference between the Company’s effective tax rate for the three and six months ended June 30, 2022, and the U.S. statutory tax rate of 21% was primarily due to a full valuation allowance recorded on the Company’s net U.S. and state deferred tax assets, income (loss) from pass-through entities not attributable to Class A Common Stock, and state and local taxes. The Company evaluates the realizability of the deferred tax assets on a quarterly basis and establishes a valuation allowance when it is more likely than not that all or a portion of a deferred tax asset may not be realized. As of June 30, 2022, the Company determined it is not more likely than not the Company’s net deferred tax assets will be realized due to significant negative evidence such as cumulative losses and continues to maintain a full valuation allowance. There are no unrecognized tax benefits recorded as of June 30, 2022 and December 31, 2021. Archaea is analyzing the relevant sections of the recently passed Inflation Reduction Act to determine what, if any, impact it may have on the 2022 financial statements. The Company does not anticipate a material impact on year-to-date activity as of June 30, 2022.

Net Earnings (Loss) Per Share

Net Earnings (Loss) Per Share	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
Net Earnings (Loss) Per Share	NOTE 18 – Net Earnings (Loss) Per Share The Archaea Merger was accounted for as a reverse recapitalization and is treated as the equivalent of Legacy Archaea receiving proceeds for the issuance of the outstanding shares of Class A Common Stock and Class B Common Stock, as well as the warrants, of Rice Acquisition Corp. accompanied by a recapitalization. Therefore, Class A Common Stock is deemed to be outstanding beginning at the Closing due to the reverse recapitalization. The Company’s basic earnings per share (“EPS”) of Class A Common Stock is computed based on the average number of shares of Class A Common Stock outstanding for the period. Diluted EPS includes the effects of the Company’s outstanding RSUs, PSUs and Private Placement Warrants, unless the effects are anti-dilutive to EPS. The following provides a reconciliation between basic and diluted EPS attributable to Class A Common Stock for the three and six months ended June 30, 2022 and 2021. Three Months Ended June 30, Six Months Ended June 30, (in thousands, except per share amounts) 2022 2021 2022 2021 Net income (loss) attributable to Class A Common shares - basic $ 21,950 $ — $ 3,523 $ — Less gain in fair value of Private Placement Warrants (37,016) — (13,004) — Net income (loss) attributable to Class A Common shares - diluted $ (15,066) $ — $ (9,481) $ — Weighted average number of Class A Common shares outstanding - basic 80,523 — 73,489 — Effect of dilutive Private Placement Warrants 2,922 — 2,715 — Effect of dilutive equity awards — — — — Weighted average number of Class A Common shares outstanding - diluted 83,445 — 76,204 — Net income (loss) per share of Class A Common Stock Basic $ 0.27 $ — $ 0.05 $ — Diluted $ (0.18) $ — $ (0.12) $ —

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Segment Information	NOTE 19 – Segment Information The Company’s two reporting segments for the three and six months ended June 30, 2022 and 2021 are RNG and Power. The Company’s chief operating decision maker evaluates the performance of its segments based on operational measures including revenues, net income and EBITDA. T he following summarizes selected financial information for the Company’s reporting segments: (in thousands) RNG Power Corporate and Other Total Three months ended June 30, 2022 Revenue and other income $ 58,781 $ 15,092 $ 3,346 $ 77,219 Intersegment revenue — 1,366 (1,366) — Total revenue and other income 58,781 16,458 1,980 77,219 Equity investment income, net 2,506 187 — 2,693 Net income (loss) 11,050 1,629 19,945 32,624 Interest expense 1,468 — 2,244 3,712 Depreciation, amortization and accretion 10,966 2,573 191 13,730 Income tax expense — — 129 129 EBITDA $ 23,484 $ 4,202 $ 22,509 $ 50,195 Six months ended June 30, 2022 Revenue and other income $ 97,620 $ 31,941 $ 4,555 $ 134,116 Intersegment revenue — 2,777 (2,777) — Total revenue and other income 97,620 34,718 1,778 134,116 Equity investment income, net 3,544 578 — 4,122 Net income (loss) 24,426 3,274 (28,248) (548) Interest expense 1,995 — 4,371 6,366 Depreciation, amortization and accretion 20,073 5,731 415 26,219 Income tax expense — — 129 129 EBITDA $ 46,494 $ 9,005 $ (23,333) $ 32,166 June 30, 2022 Goodwill $ 29,835 $ — $ — $ 29,835 Three months ended June 30, 2021 Revenue and other income $ 822 $ 2,237 $ 2,068 $ 5,127 Intersegment revenue — — — — Total revenue and other income 822 2,237 2,068 5,127 Net income (loss) (476) (1,830) (5,624) (7,930) Interest expense 13 — — 13 Depreciation, amortization and accretion 202 630 54 886 EBITDA $ (261) $ (1,200) $ (5,570) $ (7,031) Six months ended June 30, 2021 Revenue and other income $ 822 $ 2,237 $ 3,722 $ 6,781 Intersegment revenue — — — — Total revenue and other income 822 2,237 3,722 6,781 Net income (loss) (1,566) (1,830) (7,033) (10,429) Interest expense 19 — — 19 Depreciation, amortization and accretion 215 630 90 935 EBITDA $ (1,332) $ (1,200) $ (6,943) $ (9,475) December 31, 2021 Goodwill $ 29,211 $ — $ — $ 29,211

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2022
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 20 – Related Party Transactions Assai Energy, LLC (“Assai”) (a wholly owned subsidiary of the Company) entered into a construction service and project guarantee agreement with Noble Environmental Specialty Services, LLC (“NESS”) (a wholly owned subsidiary of Noble). NESS was responsible for constructing an RNG plant located at the Keystone Landfill, near Scranton, PA. The total contract price for the engineering, procurement and construction (“EPC”) contract is $19.9 million, which has been fully paid. The Company also reimbursed NESS $4.6 million for costs outside the EPC contract related to additional capital costs for the Assai project. This agreement is considered to be a related party transaction due to the owners of NESS also being certain officers of the Company. NESS billed an additional $6.1 million in capital project change orders and associated labor costs, and this amount has been capitalized to property, plant and equipment and is included in accounts payable - trade as of June 30, 2022. The Company provides O&M and construction services for facilities owned by certain of its joint ventures and recognized associated revenues of $0.7 million and $1.0 million for the three and six months ended June 30, 2022, respectively. As of June 30, 2022, the Company had related party balances with certain of its joint ventures including a receivable of $0.5 million. In 2020, the Company entered into Master Services Agreement and Development and Marketing Agreement with Lutum Technologies LLC (“Lutum”), a joint venture with 20% ownership by the Company. The Company has paid a total of $0.7 million to Lutum for the three and six months ended June 30, 2022.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	NOTE 21 – Subsequent Events On July 15, 2022, the Company paid $230.5 million to acquire 100% of the ownership interest of INGENCO pursuant to the Purchase and Sale Agreement dated April 26, 2022 and to retire INGENCO’s outstanding debt. At the acquisition date, INGENCO owned 14 LFG to renewable electricity facilities. INGENCO was purchased to increase the Company’s backlog of RNG development opportunities. The Company is currently compiling information to determine the initial accounting impacts and related purchase price allocation. Legal and other costs related to the acquisition of $1.6 million and $2.3 million were included in general and administrative expenses for the three and six months ended June 30, 2022, respectively.

Description of Business - Prede

Description of Business - Predecessor	6 Months Ended
	Jun. 30, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Description of Business - Predecessor	NOTE 1 - Organization and Description of Business Archaea Energy Inc. (“Archaea” or the "Company"), a Delaware corporation (formerly named Rice Acquisition Corp.), is one of the largest RNG producers in the U.S., with an industry-leading RNG platform primarily focused on capturing and converting waste emissions from landfills and livestock farms into low-carbon RNG and electricity. As of June 30, 2022, Archaea owns, through wholly-owned entities or joint ventures, a diversified portfolio of 32 LFG recovery and processing facilities across 18 states, including 13 operated facilities that produce pipeline-quality RNG and 19 LFG to renewable electricity production facilities, including one non-operated facility and one facility that is not operational. Archaea develops, designs, constructs, and operates RNG facilities. Archaea, through wholly-owned entities or joint ventures, has entered into long-term agreements with biogas site hosts which grant the rights to utilize gas produced at their sites and to construct and operate facilities on their sites to produce RNG and renewable electricity. On September 15, 2021, Archaea consummated the business combinations pursuant to (i) the Business Combination Agreement, dated April 7, 2021 (as amended, the “Aria Merger Agreement”), by and among Rice Acquisition Corp., a Delaware corporation (“RAC”), Rice Acquisition Holdings LLC, a Delaware limited liability company and direct subsidiary of RAC (“RAC Opco”), LFG Intermediate Co, LLC, a Delaware limited liability company and direct subsidiary of RAC Opco (“RAC Intermediate”), LFG Buyer Co, LLC, a Delaware limited liability company and direct subsidiary of RAC Intermediate (“RAC Buyer”), Inigo Merger Sub, LLC, a Delaware limited liability company and direct subsidiary of RAC Buyer (“Aria Merger Sub”), Aria Energy LLC, a Delaware limited liability company (“Aria”), and Aria Renewable Energy Systems LLC, a Delaware limited liability company, pursuant to which, among other things, Aria Merger Sub was merged with and into Aria, with Aria surviving the merger and becoming a direct subsidiary of RAC Buyer, on the terms and subject to the conditions set forth therein (the transactions contemplated by the Aria Merger Agreement, the “Aria Merger”), and (ii) the Business Combination Agreement, dated April 7, 2021 (as amended, the “Archaea Merger Agreement”), by and among RAC, RAC Opco, RAC Intermediate, RAC Buyer, Fezzik Merger Sub, LLC, a Delaware limited liability company and direct subsidiary of RAC Buyer (“Archaea Merger Sub”), Archaea Energy LLC, a Delaware limited liability company, and Archaea Energy II LLC, a Delaware limited liability company (“Legacy Archaea”), pursuant to which, among other things, Archaea Merger Sub was merged with and into Legacy Archaea, with Legacy Archaea surviving the merger and becoming a direct subsidiary of RAC Buyer, on the terms and subject to the conditions set forth therein (the transactions contemplated by the Archaea Merger Agreement, the “Archaea Merger” and, together with the Aria Merger, the “Business Combinations”). Legacy Archaea was determined to be the accounting acquirer of the Business Combinations, and Aria was determined to be the predecessor to the Company. Unless the context otherwise requires, the “Company,” “we,” “us,” and “our” refer, for periods prior to the completion of the Business Combinations, to Legacy Archaea and its subsidiaries and, for periods upon or after the completion of the Business Combinations, to Archaea Energy Inc. and its subsidiaries, including Legacy Archaea and Aria Energy LLC. Archaea has retained its “up-C” structure, whereby (i) all of the equity interests in Aria and Legacy Archaea are held indirectly by Opco through RAC Buyer and RAC Intermediate, (ii) Archaea’s only assets are its equity interests in Opco, and (iii) Sponsor, Atlas, the RAC independent directors, the Legacy Archaea Holders and the Aria Holders own or owned economic interests directly in Opco. In connection with the consummation of the Business Combinations, Rice Acquisition Holdings LLC was renamed LFG Acquisition Holdings LLC. In accordance with Accounting Standards Codification (“ASC”) 810 - Consolidation , Opco is considered a VIE with Archaea as its sole managing member and primary beneficiary. As such, Archaea consolidates Opco, and the remaining unitholders that hold economic interests directly in Opco are presented as redeemable noncontrolling interests on the Company’s financial statements. Subsequent to the Business Combinations, transactions impacting the ownership of Class A Opco Units resulted from warrant exercises, repurchases from Aria Renewable Energy Systems LLC, redemption of certain other Class A Opco Units in exchange for Class A Common Stock, and issuances related to vested restricted stock units (“RSUs”). The ownership structure of Opco upon closing of the Business Combinations and as of June 30, 2022, which gives rise to the redeemable noncontrolling interest at Archaea, is as follows: June 30, 2022 September 15, 2021 Equity Holder Class A Opco Units % Interest Class A Opco Units % Interest Archaea 80,717,757 67.4 % 52,847,195 45.9 % Total controlling interests 80,717,757 67.4 % 52,847,195 45.9 % Aria Holders — — % 23,000,000 20.0 % Legacy Archaea Holders 33,350,385 27.8 % 33,350,385 29.0 % Sponsor, Atlas and RAC independent directors 5,710,033 4.8 % 5,931,350 5.2 % Total redeemable noncontrolling interests 39,060,418 32.6 % 62,281,735 54.1 % Total 119,778,175 100.0 % 115,128,930 100.0 %
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Description of Business - Predecessor	Description of Business - Predecessor Aria Energy LLC and its subsidiaries (“Aria”) design, install, own, and operate long-lived energy projects. Aria was originally formed on September 6, 2007, as EIF Renewable Energy Holdings LLC, a Delaware LLC, headquartered in Novi, Michigan. Aria generates its revenue from customers located throughout the United States from the production and sale of electrical energy from LFG fuel engines and related Environmental Attributes, production and sale of RNG and related Environmental Attributes, operating and maintaining LFG projects owned by third parties, and constructing energy projects. Environmental Attributes include RECs in the power market and RINs and LCFS credits in the RNG market. Aria benefits from federal and state renewable fuel standards and federal compliance requirements for landfill owners and operators. Funds managed by Ares EIF Management LLC held 94.35% of the ownership interests in Aria before the Closing of the Business Combinations. The accompanying consolidated financial statements present the consolidated financial position and results of operations of Aria Energy LLC and its wholly owned subsidiaries.

Summary of Significant Accounti

Summary of Significant Accounting Policies - Predecessor	6 Months Ended
	Jun. 30, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Summary of Significant Accounting Policies - Predecessor	NOTE 2 - Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation These unaudited, interim, consolidated financial statements and notes are prepared in accordance with GAAP for interim reporting and in accordance with the rules and regulations of the SEC. These unaudited interim financial statements reflect all adjustments that are, in the opinion of management, necessary to present fairly the results for the interim periods presented. The Company’s accounting policies conform to GAAP and have been consistently applied in the presentation of financial statements. The Company’s consolidated financial statements include all wholly-owned subsidiaries and all VIEs with respect to which the Company determined it is the primary beneficiary. Certain information and disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted. Accordingly, these unaudited consolidated financial statements should be read in conjunction with the Company’s audited financial statements included in the 2021 Annual Report. The Archaea Merger with RAC was accounted for as a reverse recapitalization with Legacy Archaea deemed the accounting acquirer, and therefore, there was no step-up to fair value of any RAC assets or liabilities and no goodwill or other intangible assets were recorded. The Aria Merger was accounted for using the acquisition method of accounting with Aria deemed to be the acquiree for accounting purposes. The Company also determined that Aria is the Company’s predecessor and therefore has included the historical financial statements of Aria as predecessor beginning on page 32 . Principles of Consolidation As the Company completed its Business Combinations on September 15, 2021, these unaudited consolidated financial statements for the three and six months ended June 30, 2022 and as of December 31, 2021 include the assets, liabilities and results of operations of the combined results of the businesses of Legacy Archaea and Aria as operated by the Company after the Business Combinations; whereas, the unaudited results of operations for the three and six months ended June 30, 2021 are those of Legacy Archaea, the accounting acquirer. The Company has determined that Opco is a VIE and the Company is the primary beneficiary. Therefore, the Company consolidates Opco, and ownership interests of Opco not owned by the Company are reflected as redeemable noncontrolling interests due to certain features of the redemption right. See “Note 15 - Nonredeemable and Redeemable Noncontrolling Interest and Stockholders’ Equity.” Entities that are majority-owned by Opco are consolidated. Certain investments in entities are accounted for as equity method investments and included separately in the Company’s consolidated balance sheets. All intercompany balances and transactions have been eliminated. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, as well as contingent assets and liabilities. The estimates and assumptions used in the accompanying financial statements are based upon management’s evaluation of the relevant facts and circumstances as of the date of the financial statements. Actual results may differ from the estimates and assumptions used in preparing the accompanying consolidated financial statements. Revenue Recognition The Company generates revenues from the production and sales of RNG, Power, and associated Environmental Attributes, as well as from the performance of other landfill energy operations and maintenance (“O&M”) services. The Company also manufactures and sells customized pollution control equipment and performs associated maintenance agreement services. Prior to the January 1, 2022 adoption of ASC 842 - Leases as discussed in “Note 3 - Recently Issued and Adopted Accounting Standards,” a portion of the Company’s revenue was accounted for under ASC 840 - Leases and a portion under ASC 606 - Revenue from Contracts with Customers based on requirements of GAAP . Under ASC 840, lease revenue is recognized generally upon delivery of RNG and electricity. Under ASC 606 , revenue is recognized when (or as) the Company satisfies its performance obligation(s) under the contract by transferring the promised product or service either when (or as) its customer obtains control of the product or service, including RNG, electricity and their related Environmental Attributes. A performance obligation is a promise in a contract to transfer a distinct product or service to a customer. A contract’s transaction price is allocated to each distinct performance obligation. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring its products or services. Based on the terms of the related sales agreements, the amounts recorded under ASC 840 as lease revenue are generally consistent with revenue recognized under ASC 606. After the January 1, 2022 adoption of ASC 842, revenue is accounted for solely under ASC 606 as our facilities no longer meet the definition of leased assets under ASC 842. Business Combinations For business combinations that meet the accounting definition of a business, the Company determines and allocates the purchase price of an acquired company to the tangible and intangible assets acquired, the liabilities assumed, and noncontrolling interest, if applicable, as of the date of acquisition at fair value. Fair value may be estimated using comparable market data, a discounted cash flow method, or a combination of the two. In the discounted cash flow method, estimated future cash flows are based on management’s expectations for the future and can include estimates of future biogas production, commodity prices, operating and development costs, and a risk-adjusted discount rate. Revenues and costs of the acquired companies are included in the Company’s operating results from the date of acquisition. The Company uses its best estimates and assumptions as part of the purchase price allocation process to accurately value assets acquired and liabilities assumed at the acquisition date, and these estimates and assumptions are inherently uncertain and subject to refinement during the measurement period not to exceed one year from the acquisition date. As a result, any adjustment identified subsequent to the measurement period is included in operating results in the period in which the amount is determined. The Company’s acquisitions are discussed in “Note 4 - Business Combinations and Reverse Recapitalization.”
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Summary of Significant Accounting Policies - Predecessor	Summary of Significant Accounting Policies - Predecessor Basis of Presentation The consolidated financial statements of Aria have been prepared on the basis of United States generally accepted accounting principles (“GAAP”). Certain amounts have been reclassified to conform to the current presentation. Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect amounts reported in the consolidated financial statements. Actual results could differ from those estimates. Revenue Recognition Aria generates revenue from the production and sale of electricity, gas, and their related Environmental Attributes, and performance of other landfill energy services. Based on requirements of GAAP, a portion of revenue is accounted for under ASC 840, Leases , and a portion under ASC 606, Revenue from Contracts with Customers. Under ASC 840, revenue is recognized generally upon delivery of electricity, gas, and their related Environmental Attributes. Under ASC 606 , revenue is recognized upon the transfer of control of promised goods or services to the customer in an amount that reflects the consideration to which is expected to be entitled in exchange for those goods or serv ices. Based on the terms of the Power Purchase Agreements, the amounts recorded under ASC 840 are generally consistent with revenue recognized under ASC 606. For the six months ended June 30, 2021, approximately 36% of revenue was accounted for under ASC 606 and 64% under ASC 840. The following tables display Aria’s revenue by major source and by operating segment for the three and six months ended June 30, 2021 : (in thousands) Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 RNG, including RINs and LCFS credits $ 29,241 $ 55,722 RNG O&M service 367 706 Power, including RECs 10,809 24,626 Power O&M service 1,600 3,430 Other — 24 Total $ 42,017 $ 84,508 Operating segments RNG $ 29,608 $ 56,452 Power 12,409 28,056 Total $ 42,017 $ 84,508 Held for Sale During 2020, Aria enacted a plan to sell LES Project Holdings LLC (“LESPH”), and accordingly, the business was classified as held for sale. An agreement to sell the membership interests of the business subsequently was executed on March 1, 2021. The sale of LESPH was completed on June 10, 2021. Proceeds from the sale were $58.5 million and were sent to the lenders of the LESPH debt, and Aria was released from its obligations under the LESPH debt. A gain on the extinguishment of debt in the amount of $61.4 million was recorded in conjunction with the sale, which accounts for the proceeds received, the debt and interest payable relieved and settlement of LESPH intercompany balances, and Aria recorded an ordinary gain on sale of assets in the amount of $1.3 million during the three and six months ended June 30, 2021.

Equity Method Investments - Pre

Equity Method Investments - Predecessor	6 Months Ended
	Jun. 30, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Equity Method Investments - Predecessor	NOTE 7 – Equity Method Investments As a result of the Aria Merger, the Company holds 50% interest in two joint ventures, Mavrix, LLC (“Mavrix”) and Sunshine Gas Producers, LLC (“SGP”), which are accounted for using the equity method due to the joint control by both the Company and unrelated parties with ownership interest in each entity. Under the terms of the original Mavrix, LLC Contribution Agreement dated September 30, 2017, the Company is required to make an earn-out payment to its joint venture partner holding the other 50% membership in Mavrix in an amount up to $9.55 million. The earn-out payment represents additional consideration for the Company’s equity interest in Mavrix and will be based on the performance of certain projects owned by Mavrix through the earn-out period which ends September 30, 2022. No earn-out payment is due until the completion of the earn-out period. In February 2022, the Mavrix, LLC Contribution Agreement was amended to exclude certain upgrade and optimization capital expenditures incurred for one specific project from the earn-out calculation and to add a maintenance expenditure cap. Based on the amended terms, the Company has estimated the earn-out payment to be $8.3 million at June 30, 2022, and this amount is reflected in the accompanying balance sheet in accrued and other current liabilities. The summarized financial information for the Mavrix and SGP equity method investments is as follows: (in thousands) June 30, 2022 December 31, 2021 Assets $ 225,978 $ 203,864 Liabilities 51,873 15,477 Net assets $ 174,105 $ 188,387 Company’s share of equity in net assets $ 87,052 $ 94,194 (in thousands) Three Months Ended June 30, 2022 Six Months Ended June 30, 2022 Total revenues $ 26,797 $ 52,025 Net income $ 10,419 $ 18,436 Company’s share of net income $ 5,209 $ 9,218 The Company’s carrying values of the Mavrix and SGP investments also include basis differences totaling $154.5 million as of June 30, 2022 as a result of the fair value measurements recorded as part of the Aria Merger. Amortization of the basis differences reduced equity investment income by $2.6 million and $5.1 million for the three and six months ended June 30, 2022, respectively. On December 30, 2021, the Company entered into a new joint venture. The Company contributed $7.5 million in cash in 2021 into this newly created entity, Saturn Renewables LLC ("Saturn"), in exchange for a 50% interest, and the joint venture acquired gas rights at two landfill sites to develop RNG facilities. The Company is the operator of Saturn’s day-to-day operations and accounts for its investment in Saturn using the equity method. The Company has contributed an additional $8.0 million to the Saturn joint venture during the six months ended June 30, 2022, and the carrying value of Saturn was $15.5 million as of June 30, 2022.
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Equity Method Investments - Predecessor	Equity Method Investments - Predecessor Aria holds 50% interests in two joint ventures accounted for using the equity method – Mavrix and Sunshine Gas Producers, LLC. Prior to the sale of LESPH in June 2021, Aria also held 50% interests in the following four joint ventures: Riverview Energy Systems, LLC, Adrian Energy Systems, LLC, Salem Energy Systems, LLC, and Salt Lake Energy Systems LLC. Under the terms of the Mavrix, LLC Contribution Agreement dated September 30, 2017, Aria is required to make an earn-out payment to its joint venture partner holding the other 50% membership (in Mavrix) in an amount up to $9.55 million. As defined in the Contribution Agreement, the payment represents additional consideration for Aria’s equity interest in Mavrix, and the earn-out payment will be based on the performance of certain projects owned by Mavrix through the earn-out period which ends September 30, 2022. No earn-out payment is made until after the end of the earn-out period. Aria has estimated the earn-out payment to be $1.7 million at June 30, 2021 and has recorded these amounts in other long-term liabilities in the period. Summary information on the equity method investments is as follows: (in thousands) June 30, 2021 Assets $ 186,521 Liabilities 14,862 Net assets $ 171,659 Aria’s share of equity in net assets $ 85,299 (in thousands) Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 Revenue $ 29,303 $ 52,902 Net income $ 13,907 $ 25,275 Aria’s share of net income $ 7,469 $ 13,325

Derivative Instruments - Predec

Derivative Instruments - Predecessor	6 Months Ended
	Jun. 30, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Derivative Instruments - Predecessor	NOTE 13 – Derivative Instruments Warrant Liabilities In June 2022, 234,399 Private Placement Warrants were exercised on cashless basis at an exercise price of $11.50 per share in exchange for a total of 100,009 shares of Class A Common Stock. As of June 30, 2022, 6,536,601 Private Placement Warrants remain outstanding, and each is exercisable to purchase one share of Class A Common Stock or, in certain circumstances, one Class A Opco Unit and corresponding share of Class B Common Stock. The Private Placement Warrants expire on September 15, 2026, or earlier upon redemption or liquidation. Private Placement Warrants are nonredeemable so long as they are held by the initial purchasers or their permitted transferees. The outstanding Private Placement Warrants continue to be held by the initial purchasers or their permitted transferees as of June 30, 2022. The Private Placement Warrants contain exercise and settlement features that preclude them from being classified within stockholders’ equity, and therefore are recognized as derivative liabilities. The Company recognizes the warrant instruments as liabilities at fair value with changes in fair value included within gain (loss) on warrants and derivative contracts in the Company’s consolidated statements of operations. Derivative warrant liabilities are classified as non-current liabilities as their liquidation is not reasonably expected to require the use of current assets or require the creation of current liabilities. The fair value of the Private Placement Warrants is estimated using the Black-Scholes option pricing model (a Level 3 measurement). The Company used the following assumptions to estimate the fair value of the Private Placement Warrants: June 30, 2022 December 31, 2021 Stock price $ 15.53 $ 18.28 Exercise price $ 11.50 $ 11.50 Volatility 49.5 % 46.0 % Expected term (years) 4.2 4.7 Risk-free interest rate 3.0 % 1.2 % The change in the fair value of the warrant liabilities is recognized in gain (loss) on warrants and derivative contracts in the consolidated statement of operations. The changes in the warrant liabilities for the six months ended June 30, 2022 are as follows: (in thousands) Warrant liabilities as of December 31, 2021 $ 67,290 Change in fair value (13,004) Less fair value of warrants exercised (1,556) Warrant liabilities as of June 30, 2022 $ 52,730 Natural Gas Swap In conjunction with the Business Combinations, the Company assumed a natural gas variable to fixed priced swap agreement entered into by Aria. The Company is the fixed price payer under the swap agreement that provides for monthly net settlements through the termination date of June 30, 2023. The agreement was intended to manage the risk associated with changing commodity prices. The agreement has a remaining notional of 219,000 MMBtu as of June 30, 2022. Changes in the fair values and realized gains (losses) for the natural gas swap are recognized in gain (loss) on warrants and derivative contracts in the consolidated statement of operations. Valuation of the natural gas swap was calculated by discounting future net cash flows that were based on a forward price curve for natural gas over the remaining life of the contract (a Level 2 measurement), with an adjustment for each counterparty’s credit rate risk. Interest Rate Swap In December 2021, the Company entered into an interest rate swap that locks in payments of a fixed interest rate of 1.094% in exchange for a floating interest rate that resets monthly based on LIBOR. The interest rate swap was not designated as a hedging instrument, and net gains and losses are recognized currently in gain (loss) on warrants and derivative contracts. The interest rate swap notional was $107.9 million as of June 30, 2022 and declines over the term of the swap to $94.9 million at the December 2024 contract termination date. The following summarizes the balance sheet classification and fair value of the Company’s derivative instruments as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Prepaid expenses and other current assets Natural gas swap asset $ 245 $ — Interest rate swap asset 1,906 — Other non-current assets Interest rate swap asset 2,814 439 Total derivative assets $ 4,965 $ 439 Accrued and other current liabilities Natural gas swap liability $ 55 $ 44 Interest rate swap liability — 727 Derivative liabilities Natural gas swap liability — 134 Warrant liabilities 52,730 67,290 Total derivative liabilities $ 52,785 $ 68,195 The following table summarizes the income statement effect of gains and losses related to warrants and derivative instruments for the three and six months ended June 30, 2022 and 2021: Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2022 2021 2022 2021 Gain (loss) on natural gas swap contract $ 116 $ — $ 570 $ — Gain (loss) on interest rate swap contract 963 — 4,606 — Gain (loss) on warrant liabilities 37,016 — 13,004 — Total $ 38,095 $ — $ 18,180 $ —
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Derivative Instruments - Predecessor	Derivative Instruments - Predecessor Aria was exposed to certain risks in the normal course of its business operations. The main risks are those relating to the variability of future earnings and cash flows – e.g., market risks, which are managed through the use of derivative instruments. All derivative financial instruments are reported in the consolidated balance sheets at fair value, unless they meet the normal purchase normal sale criteria and are designated and documented as such. Aria has a natural gas variable to fixed-priced swap agreement which provides for a fixed to variable rate swap calculated monthly, until the termination date of the contract, June 30, 2023. The agreement was intended to manage the risk associated with changing commodity prices. Changes in the fair values of natural gas swap are recognized in gain (loss) on derivative contracts and realized losses are recognized as a component of cost of energy expense as summarized in the table below. Valuation of the natural gas swap was calculated by discounting future net cash flows that were based on a forward price curve for natural gas over the life of the contract (a Level 2 measurement), with an adjustment for each counterparty's credit rate risk. On April 6, 2020, Aria entered into an interest rate cap with a total notional amount of $110 million and an effective date of April 30, 2020. The cap agreement provides a fixed cap rate of 1.00% per annum related to the one-month LIBOR and has a termination date of May 31, 2022. The market value at June 30, 2021 was valued at zero and all associated fees with this transaction were recorded. (in thousands) Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 Natural gas swap - unrealized gain (loss) $ 446 $ 556

Benefit Plans - Predecessor

Benefit Plans - Predecessor	6 Months Ended
	Jun. 30, 2022
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Benefit Plans - Predecessor	Benefit Plans - Predecessor 401(k) Plan Aria maintains a qualified tax deferred 401(k) retirement plan (the “Aria Plan”). Under the provisions of the Aria Plan, substantially all employees meeting minimum age and service requirements are entitled to contribute on a before and after-tax basis a certain percentage of their compensation. Aria matches up to 100% of employees’ first 3% contribution and 50% of the employees’ next 2% contribution. Employees vest immediately in their contributions and Aria’s contribution. Postretirement Obligations Aria sponsors an unfunded defined benefit health care plan that provides postretirement medical benefits to certain full-time employees who meet minimum age and service requirements. Net periodic benefit cost recognized in the consolidated statements of comprehensive income was as follows: (in thousands) Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 Service cost $ 9 $ 19 Interest cost 25 45 Amortization of prior service cost 3 6 Recognition of net actuarial loss 16 40 Net periodic benefit cost $ 53 $ 110

Related Party Transactions - Pr

Related Party Transactions - Predecessor	6 Months Ended
	Jun. 30, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Related Party Transactions - Predecessor	NOTE 20 – Related Party Transactions Assai Energy, LLC (“Assai”) (a wholly owned subsidiary of the Company) entered into a construction service and project guarantee agreement with Noble Environmental Specialty Services, LLC (“NESS”) (a wholly owned subsidiary of Noble). NESS was responsible for constructing an RNG plant located at the Keystone Landfill, near Scranton, PA. The total contract price for the engineering, procurement and construction (“EPC”) contract is $19.9 million, which has been fully paid. The Company also reimbursed NESS $4.6 million for costs outside the EPC contract related to additional capital costs for the Assai project. This agreement is considered to be a related party transaction due to the owners of NESS also being certain officers of the Company. NESS billed an additional $6.1 million in capital project change orders and associated labor costs, and this amount has been capitalized to property, plant and equipment and is included in accounts payable - trade as of June 30, 2022. The Company provides O&M and construction services for facilities owned by certain of its joint ventures and recognized associated revenues of $0.7 million and $1.0 million for the three and six months ended June 30, 2022, respectively. As of June 30, 2022, the Company had related party balances with certain of its joint ventures including a receivable of $0.5 million. In 2020, the Company entered into Master Services Agreement and Development and Marketing Agreement with Lutum Technologies LLC (“Lutum”), a joint venture with 20% ownership by the Company. The Company has paid a total of $0.7 million to Lutum for the three and six months ended June 30, 2022.
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Related Party Transactions - Predecessor	Related Party Transactions - Predecessor Sales are made to and services are purchased from entities and individuals affiliated through common ownership. Aria provides O&M services and administration and accounting services to their 50% owned joint ventures. The following is a summary of transactions with these related parties: (in thousands) Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 Sales of construction services $ — $ 24 Sales of operations and maintenance services $ 351 $ 746 Sales of administrative and other services $ 97 $ 195

Segment Reporting - Predecessor

Segment Reporting - Predecessor	6 Months Ended
	Jun. 30, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Segment Reporting - Predecessor	NOTE 19 – Segment Information The Company’s two reporting segments for the three and six months ended June 30, 2022 and 2021 are RNG and Power. The Company’s chief operating decision maker evaluates the performance of its segments based on operational measures including revenues, net income and EBITDA. T he following summarizes selected financial information for the Company’s reporting segments: (in thousands) RNG Power Corporate and Other Total Three months ended June 30, 2022 Revenue and other income $ 58,781 $ 15,092 $ 3,346 $ 77,219 Intersegment revenue — 1,366 (1,366) — Total revenue and other income 58,781 16,458 1,980 77,219 Equity investment income, net 2,506 187 — 2,693 Net income (loss) 11,050 1,629 19,945 32,624 Interest expense 1,468 — 2,244 3,712 Depreciation, amortization and accretion 10,966 2,573 191 13,730 Income tax expense — — 129 129 EBITDA $ 23,484 $ 4,202 $ 22,509 $ 50,195 Six months ended June 30, 2022 Revenue and other income $ 97,620 $ 31,941 $ 4,555 $ 134,116 Intersegment revenue — 2,777 (2,777) — Total revenue and other income 97,620 34,718 1,778 134,116 Equity investment income, net 3,544 578 — 4,122 Net income (loss) 24,426 3,274 (28,248) (548) Interest expense 1,995 — 4,371 6,366 Depreciation, amortization and accretion 20,073 5,731 415 26,219 Income tax expense — — 129 129 EBITDA $ 46,494 $ 9,005 $ (23,333) $ 32,166 June 30, 2022 Goodwill $ 29,835 $ — $ — $ 29,835 Three months ended June 30, 2021 Revenue and other income $ 822 $ 2,237 $ 2,068 $ 5,127 Intersegment revenue — — — — Total revenue and other income 822 2,237 2,068 5,127 Net income (loss) (476) (1,830) (5,624) (7,930) Interest expense 13 — — 13 Depreciation, amortization and accretion 202 630 54 886 EBITDA $ (261) $ (1,200) $ (5,570) $ (7,031) Six months ended June 30, 2021 Revenue and other income $ 822 $ 2,237 $ 3,722 $ 6,781 Intersegment revenue — — — — Total revenue and other income 822 2,237 3,722 6,781 Net income (loss) (1,566) (1,830) (7,033) (10,429) Interest expense 19 — — 19 Depreciation, amortization and accretion 215 630 90 935 EBITDA $ (1,332) $ (1,200) $ (6,943) $ (9,475) December 31, 2021 Goodwill $ 29,211 $ — $ — $ 29,211
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Segment Reporting - Predecessor	Segment Reporting - Predecessor (in thousands) RNG Power Corporate and Other Total Three months ended June 30, 2021 Total revenue $ 28,716 $ 12,347 $ — $ 41,063 Net income (loss) 21,823 63,422 (9,195) 76,050 Depreciation, amortization and accretion 2,284 3,325 12 5,621 Interest expense — — 4,355 4,355 EBITDA $ 24,107 $ 66,747 $ (4,828) $ 86,026 Six Months Ended June 30, 2021 Total Revenue $ 54,669 $ 27,931 $ — $ 82,600 Net income (loss) 38,773 64,925 (18,938) 84,760 Depreciation, amortization and accretion 4,559 6,728 27 11,314 Interest expense — — 8,676 8,676 EBITDA $ 43,332 $ 71,653 $ (10,235) $ 104,750

Basis of Presentation_and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation These unaudited, interim, consolidated financial statements and notes are prepared in accordance with GAAP for interim reporting and in accordance with the rules and regulations of the SEC. These unaudited interim financial statements reflect all adjustments that are, in the opinion of management, necessary to present fairly the results for the interim periods presented. The Company’s accounting policies conform to GAAP and have been consistently applied in the presentation of financial statements. The Company’s consolidated financial statements include all wholly-owned subsidiaries and all VIEs with respect to which the Company determined it is the primary beneficiary. Certain information and disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted. Accordingly, these unaudited consolidated financial statements should be read in conjunction with the Company’s audited financial statements included in the 2021 Annual Report. The Archaea Merger with RAC was accounted for as a reverse recapitalization with Legacy Archaea deemed the accounting acquirer, and therefore, there was no step-up to fair value of any RAC assets or liabilities and no goodwill or other intangible assets were recorded. The Aria Merger was accounted for using the acquisition method of accounting with Aria deemed to be the acquiree for accounting purposes. The Company also determined that Aria is the Company’s predecessor and therefore has included the historical financial statements of Aria as predecessor beginning on page 32 .
Principles of Consolidation	Principles of Consolidation As the Company completed its Business Combinations on September 15, 2021, these unaudited consolidated financial statements for the three and six months ended June 30, 2022 and as of December 31, 2021 include the assets, liabilities and results of operations of the combined results of the businesses of Legacy Archaea and Aria as operated by the Company after the Business Combinations; whereas, the unaudited results of operations for the three and six months ended June 30, 2021 are those of Legacy Archaea, the accounting acquirer. The Company has determined that Opco is a VIE and the Company is the primary beneficiary. Therefore, the Company consolidates Opco, and ownership interests of Opco not owned by the Company are reflected as redeemable noncontrolling interests due to certain features of the redemption right. See “Note 15 - Nonredeemable and Redeemable Noncontrolling Interest and Stockholders’ Equity.” Entities that are majority-owned by Opco are consolidated. Certain investments in entities are accounted for as equity method investments and included separately in the Company’s consolidated balance sheets. All intercompany balances and transactions have been eliminated.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, as well as contingent assets and liabilities. The estimates and assumptions used in the accompanying financial statements are based upon management’s evaluation of the relevant facts and circumstances as of the date of the financial statements. Actual results may differ from the estimates and assumptions used in preparing the accompanying consolidated financial statements.
Revenue Recognition	Revenue Recognition The Company generates revenues from the production and sales of RNG, Power, and associated Environmental Attributes, as well as from the performance of other landfill energy operations and maintenance (“O&M”) services. The Company also manufactures and sells customized pollution control equipment and performs associated maintenance agreement services. Prior to the January 1, 2022 adoption of ASC 842 - Leases as discussed in “Note 3 - Recently Issued and Adopted Accounting Standards,” a portion of the Company’s revenue was accounted for under ASC 840 - Leases and a portion under ASC 606 - Revenue from Contracts with Customers based on requirements of GAAP . Under ASC 840, lease revenue is recognized generally upon delivery of RNG and electricity. Under ASC 606 ,
Business Combinations	Business Combinations For business combinations that meet the accounting definition of a business, the Company determines and allocates the purchase price of an acquired company to the tangible and intangible assets acquired, the liabilities assumed, and noncontrolling interest, if applicable, as of the date of acquisition at fair value. Fair value may be estimated using comparable market data, a discounted cash flow method, or a combination of the two. In the discounted cash flow method, estimated future cash flows are based on management’s expectations for the future and can include estimates of future biogas production, commodity prices, operating and development costs, and a risk-adjusted discount rate. Revenues and costs of the acquired companies are included in the Company’s operating results from the date of acquisition. The Company uses its best estimates and assumptions as part of the purchase price allocation process to accurately value assets acquired and liabilities assumed at the acquisition date, and these estimates and assumptions are inherently uncertain and subject to refinement during the measurement period not to exceed one year from the acquisition date. As a result, any adjustment identified subsequent to the measurement period is included in operating results in the period in which the amount is determined. The Company’s acquisitions are discussed in “Note 4 - Business Combinations and Reverse Recapitalization.”
Recently Issued and Adopted Accounting Standards	NOTE 3 – Recently Issued and Adopted Accounting Standards In February 2016, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, Leases (Topic 842), to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The main difference between previous generally accepted accounting principles and the new requirements under Topic 842 is the recognition of lease assets and lease liabilities by lessees for those leases with a term greater than 12 months classified as operating leases under previous GAAP. Upon adoption of Topic 842 as of January 1, 2022, the Company recognized $5.1 million of right-of-use (“ROU”) assets and lease liabilities on its consolidated balance sheet related to operating leases existing on the adoption date. Prior period financial statements were not adjusted. The adoption of Topic 842 did not have a material impact on the Company’s consolidated statement of operations or consolidated statement of cash flows. See “Note 11 - Leases” for additional information. In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (ASC 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting . ASU 2020-04 provides optional guidance for a limited period of time to ease the transition from the London Inter-Bank Offered Rate (“LIBOR”) to an alternative reference rate. The guidance intends to address certain concerns relating to accounting for contract modifications and hedge accounting. These optional expedients and exceptions to applying GAAP, assuming certain criteria are met, are allowed through December 31, 2022. The Company is currently evaluating the provisions of this update and has not yet determined whether it will elect the optional expedients. The Company does not expect the transition to an alternative rate to have a material impact on its business, operations or liquidity. In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers . ASU 2021-08 requires all entities to recognize and measure contract assets and liabilities in a business combination in accordance with Topic 606, Revenue from Contracts with Customers. The guidance aims to improve comparability for revenue contracts with customers by providing consistent recognition and measurement guidance for all revenue contracts with customers. ASU 2021-08 is effective for the Company for fiscal years beginning after December 15, 2022, with early adoption permitted. The Company will adopt this ASU as of January 1, 2023 and does not expect the adoption to have a material impact on its financial condition, results of operations, or cash flows.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies - Predecessor (Policies)	6 Months Ended
	Jun. 30, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Basis of Presentation	Basis of Presentation These unaudited, interim, consolidated financial statements and notes are prepared in accordance with GAAP for interim reporting and in accordance with the rules and regulations of the SEC. These unaudited interim financial statements reflect all adjustments that are, in the opinion of management, necessary to present fairly the results for the interim periods presented. The Company’s accounting policies conform to GAAP and have been consistently applied in the presentation of financial statements. The Company’s consolidated financial statements include all wholly-owned subsidiaries and all VIEs with respect to which the Company determined it is the primary beneficiary. Certain information and disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted. Accordingly, these unaudited consolidated financial statements should be read in conjunction with the Company’s audited financial statements included in the 2021 Annual Report. The Archaea Merger with RAC was accounted for as a reverse recapitalization with Legacy Archaea deemed the accounting acquirer, and therefore, there was no step-up to fair value of any RAC assets or liabilities and no goodwill or other intangible assets were recorded. The Aria Merger was accounted for using the acquisition method of accounting with Aria deemed to be the acquiree for accounting purposes. The Company also determined that Aria is the Company’s predecessor and therefore has included the historical financial statements of Aria as predecessor beginning on page 32 .
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, as well as contingent assets and liabilities. The estimates and assumptions used in the accompanying financial statements are based upon management’s evaluation of the relevant facts and circumstances as of the date of the financial statements. Actual results may differ from the estimates and assumptions used in preparing the accompanying consolidated financial statements.
Revenue Recognition	Revenue Recognition The Company generates revenues from the production and sales of RNG, Power, and associated Environmental Attributes, as well as from the performance of other landfill energy operations and maintenance (“O&M”) services. The Company also manufactures and sells customized pollution control equipment and performs associated maintenance agreement services. Prior to the January 1, 2022 adoption of ASC 842 - Leases as discussed in “Note 3 - Recently Issued and Adopted Accounting Standards,” a portion of the Company’s revenue was accounted for under ASC 840 - Leases and a portion under ASC 606 - Revenue from Contracts with Customers based on requirements of GAAP . Under ASC 840, lease revenue is recognized generally upon delivery of RNG and electricity. Under ASC 606 ,
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Basis of Presentation	Basis of Presentation The consolidated financial statements of Aria have been prepared on the basis of United States generally accepted accounting principles (“GAAP”). Certain amounts have been reclassified to conform to the current presentation.
Use of Estimates	Use of EstimatesThe preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect amounts reported in the consolidated financial statements. Actual results could differ from those estimates.
Revenue Recognition	Revenue Recognition Aria generates revenue from the production and sale of electricity, gas, and their related Environmental Attributes, and performance of other landfill energy services. Based on requirements of GAAP, a portion of revenue is accounted for under ASC 840, Leases , and a portion under ASC 606, Revenue from Contracts with Customers. Under ASC 840, revenue is recognized generally upon delivery of electricity, gas, and their related Environmental Attributes. Under ASC 606 , revenue is recognized upon the transfer of control of promised goods or services to the customer in an amount that reflects the consideration to which is expected to be entitled in exchange for those goods or serv ices. Based on the terms of the Power Purchase Agreements, the amounts recorded under ASC 840 are generally consistent with revenue recognized under ASC 606. For the six months ended June 30, 2021, approximately 36% of revenue was accounted for under ASC 606 and 64% under ASC 840. The following tables display Aria’s revenue by major source and by operating segment for the three and six months ended June 30, 2021 : (in thousands) Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 RNG, including RINs and LCFS credits $ 29,241 $ 55,722 RNG O&M service 367 706 Power, including RECs 10,809 24,626 Power O&M service 1,600 3,430 Other — 24 Total $ 42,017 $ 84,508 Operating segments RNG $ 29,608 $ 56,452 Power 12,409 28,056 Total $ 42,017 $ 84,508
Held for Sale	Held for Sale During 2020, Aria enacted a plan to sell LES Project Holdings LLC (“LESPH”), and accordingly, the business was classified as held for sale. An agreement to sell the membership interests of the business subsequently was executed on March 1, 2021. The sale of LESPH was completed on June 10, 2021. Proceeds from the sale were $58.5 million and were sent to the lenders of the LESPH debt, and Aria was released from its obligations under the LESPH debt. A gain on the extinguishment of debt in the amount of $61.4 million was recorded in conjunction with the sale, which accounts for the proceeds received, the debt and interest payable relieved and settlement of LESPH intercompany balances, and Aria recorded an ordinary gain on sale of assets in the amount of $1.3 million during the three and six months ended June 30, 2021.

Organization and Description _2

Organization and Description of Business (Tables)	6 Months Ended
	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Investment Holdings, Schedule of Investments	The ownership structure of Opco upon closing of the Business Combinations and as of June 30, 2022, which gives rise to the redeemable noncontrolling interest at Archaea, is as follows: June 30, 2022 September 15, 2021 Equity Holder Class A Opco Units % Interest Class A Opco Units % Interest Archaea 80,717,757 67.4 % 52,847,195 45.9 % Total controlling interests 80,717,757 67.4 % 52,847,195 45.9 % Aria Holders — — % 23,000,000 20.0 % Legacy Archaea Holders 33,350,385 27.8 % 33,350,385 29.0 % Sponsor, Atlas and RAC independent directors 5,710,033 4.8 % 5,931,350 5.2 % Total redeemable noncontrolling interests 39,060,418 32.6 % 62,281,735 54.1 % Total 119,778,175 100.0 % 115,128,930 100.0 %

Revenues (Tables)

Revenues (Tables)	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregates Revenue by Significant Product Type	The following table disaggregates revenue by significant product type and operating segment for the three and six months ended June 30, 2022 and 2021: Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2022 2021 2022 2021 Revenue by Product Type RNG, including RINs and LCFS credits $ 55,086 $ 821 $ 89,883 $ 821 RNG O&M service (1) 242 — 532 — Power, including RECs 14,893 2,238 31,759 2,238 Power O&M service (1) 953 — 1,851 — Equipment and associated services 2,808 2,068 4,022 3,722 Other (1) 468 — 533 — Total $ 74,450 $ 5,127 $ 128,580 $ 6,781 Revenue by Operating Segment RNG $ 55,328 $ 821 $ 90,415 $ 821 Power 15,846 2,238 33,610 2,238 Corporate and Other 3,276 2,068 4,555 3,722 Total $ 74,450 $ 5,127 $ 128,580 $ 6,781 _____________________________________________ (1) Includes revenues earned from the Company’s joint ventures, see “Note 20 - Related Party Transactions.”
Schedule of Contract Assets and Liabilities	Contract assets and liabilities consisted of the following as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Contract assets (included in Prepaid expenses and other current assets) $ 168 $ 87 Contract liabilities (included in Accrued and other current liabilities) $ (270) $ (505)
Schedule of Revenue Expected to be Recognized on Remaining Performance Obligations Under Sales Contracts	The following table summarizes the revenue the Company expects to recognize over next 21 years on these firm sales contracts as of June 30, 2022: (in thousands) Remainder of 2022 $ 42,026 2023-2024 262,001 2025-2026 429,996 2027-2028 441,067 2029-2030 434,641 2031-2032 418,453 Thereafter 1,871,603 Total $ 3,899,787

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	6 Months Ended
	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	Property, plant and equipment consist of the following as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Machinery and equipment $ 307,808 $ 285,718 Buildings and improvements 17,517 16,039 Furniture and fixtures 2,326 1,176 Construction in progress (1) 151,496 55,039 Land 266 246 Total cost 479,413 358,218 Less accumulated depreciation (19,073) (7,635) Property, plant and equipment, net $ 460,340 $ 350,583 _____________________________________________ (1) Includes both acquired long-lead equipment and projects in progress.

Equity Method Investments (Tabl

Equity Method Investments (Tables)	6 Months Ended
	Jun. 30, 2022
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Equity Method Investments	The summarized financial information for the Mavrix and SGP equity method investments is as follows: (in thousands) June 30, 2022 December 31, 2021 Assets $ 225,978 $ 203,864 Liabilities 51,873 15,477 Net assets $ 174,105 $ 188,387 Company’s share of equity in net assets $ 87,052 $ 94,194 (in thousands) Three Months Ended June 30, 2022 Six Months Ended June 30, 2022 Total revenues $ 26,797 $ 52,025 Net income $ 10,419 $ 18,436 Company’s share of net income $ 5,209 $ 9,218

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	Intangible assets consist of the following as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 Gross Carrying Amount Accumulated Amortization Net Biogas rights agreements $ 612,461 $ 22,814 $ 589,647 Electricity off-take agreements 26,511 2,344 24,167 O&M contracts 8,620 460 8,160 RNG purchase contract 10,290 5,291 4,999 Trade names and customer relationships 500 250 250 Total $ 658,382 $ 31,159 $ 627,223 (in thousands) December 31, 2021 Gross Carrying Amount Accumulated Amortization Net Biogas rights agreements $ 603,868 $ 8,237 $ 595,631 Electricity off-take agreements 26,511 749 25,762 O&M contracts 8,620 173 8,447 RNG purchase contract 10,290 1,959 8,331 Trade names and customer relationships 500 200 300 Total $ 649,789 $ 11,318 $ 638,471
Schedule of Below-Market Contract Liability	The contracts were recorded at fair value and are classified as other long-term liabilities on the Company’s consolidated balance sheets as of June 30, 2022 and December 31, 2021: June 30, 2022 Gross Liability Accumulated Amortization Net Gas off-take agreements $ 146,990 $ 11,780 $ 135,210 December 31, 2021 Gross Liability Accumulated Amortization Net Gas off-take agreements $ 146,990 $ 4,360 $ 142,630

Accrued and Other Current Lia_2

Accrued and Other Current Liabilities (Tables)	6 Months Ended
	Jun. 30, 2022
Payables and Accruals [Abstract]
Schedule of Accrued Liabilities	Accrued and other current liabilities consist of the following as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Accrued expenses $ 30,377 $ 16,638 Accrued capital expenditures 22,760 16,609 Derivative liabilities 55 771 Payroll and related costs 6,875 7,683 Accrued interest 70 738 Contract liabilities 270 505 Other current liabilities 3,200 3,335 Total $ 63,607 $ 46,279
Other Current Liabilities	Accrued and other current liabilities consist of the following as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Accrued expenses $ 30,377 $ 16,638 Accrued capital expenditures 22,760 16,609 Derivative liabilities 55 771 Payroll and related costs 6,875 7,683 Accrued interest 70 738 Contract liabilities 270 505 Other current liabilities 3,200 3,335 Total $ 63,607 $ 46,279

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Schedule of Outstanding Debt	The Company’s outstanding debt consists of the following as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Credit Agreement, as amended - Term Loan $ 400,000 $ 218,625 Credit Agreement, as amended - Revolver 50,000 — Wilmington Trust – 4.47% Term Note 60,828 60,828 Wilmington Trust – 3.75% Term Note 69,667 72,542 580,495 351,995 Less unamortized debt issuance costs (10,027) (9,221) Long-term debt less debt issuance costs 570,468 342,774 Less current maturities, net (21,568) (11,378) Total long-term debt, net $ 548,900 $ 331,396
Schedule of Maturities of Long-term Debt	Scheduled future maturities of long-term debt principal amounts are as follows: (in thousands) Remainder of 2022 $ 10,502 2023 26,108 2024 26,371 2025 26,598 2026 and thereafter 490,916 Total $ 580,495

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2022
Leases [Abstract]
Lease, Cost	Supplemental information related to the Company’s ROU assets and related operating lease liabilities were as follows: (in thousands) Six Months Ended June 30, 2022 Operating cash outflows for operating leases $ 1,346 Weighted average remaining lease term (in years) 8.9 Weighted average discount rate 5.0 %
Schedule of Future Lease Payments of Operating Leases	As of June 30, 2022, future lease payments under the Company’s operating leases that have commenced are as follows: (in thousands) Remainder of 2022 $ 602 2023 625 2024 609 2025 589 2026 533 2027 546 Thereafter 2,576 Total future lease payments 6,080 Less portion representing imputed interest (1,205) Total operating lease liabilities $ 4,875

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Assumptions to Estimate the Fair Value	The Company used the following assumptions to estimate the fair value of the Private Placement Warrants: June 30, 2022 December 31, 2021 Stock price $ 15.53 $ 18.28 Exercise price $ 11.50 $ 11.50 Volatility 49.5 % 46.0 % Expected term (years) 4.2 4.7 Risk-free interest rate 3.0 % 1.2 %
Schedule of Fair Value of Warrant Liabilities	The change in the fair value of the warrant liabilities is recognized in gain (loss) on warrants and derivative contracts in the consolidated statement of operations. The changes in the warrant liabilities for the six months ended June 30, 2022 are as follows: (in thousands) Warrant liabilities as of December 31, 2021 $ 67,290 Change in fair value (13,004) Less fair value of warrants exercised (1,556) Warrant liabilities as of June 30, 2022 $ 52,730
Schedule of Balance Sheet Effect of Fair Value	The following summarizes the balance sheet classification and fair value of the Company’s derivative instruments as of June 30, 2022 and December 31, 2021: (in thousands) June 30, 2022 December 31, 2021 Prepaid expenses and other current assets Natural gas swap asset $ 245 $ — Interest rate swap asset 1,906 — Other non-current assets Interest rate swap asset 2,814 439 Total derivative assets $ 4,965 $ 439 Accrued and other current liabilities Natural gas swap liability $ 55 $ 44 Interest rate swap liability — 727 Derivative liabilities Natural gas swap liability — 134 Warrant liabilities 52,730 67,290 Total derivative liabilities $ 52,785 $ 68,195
Schedule of Income Statement Effect of Gains (Losses) Related to Derivative Instruments	The following table summarizes the income statement effect of gains and losses related to warrants and derivative instruments for the three and six months ended June 30, 2022 and 2021: Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2022 2021 2022 2021 Gain (loss) on natural gas swap contract $ 116 $ — $ 570 $ — Gain (loss) on interest rate swap contract 963 — 4,606 — Gain (loss) on warrant liabilities 37,016 — 13,004 — Total $ 38,095 $ — $ 18,180 $ —

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Schedule of Fair Value Derivative Liabilities Measured on Recurring Basis	The following table summarizes the outstanding derivative instruments and the fair value hierarchy for the Company’s derivative assets and liabilities that are required to be measured at fair value on a recurring basis: (in thousands) Level 1 Level 2 Level 3 Total Fair Value June 30, 2022 Assets Natural gas swap $ — $ 245 $ — $ 245 Interest rate swap — 4,720 — 4,720 Liabilities Natural gas swap $ — $ 55 $ — $ 55 Warrant liabilities — — 52,730 52,730 (in thousands) Level 1 Level 2 Level 3 Total Fair Value December 31, 2021 Assets Interest rate swap $ — $ 439 $ — $ 439 Liabilities Natural gas swap $ — $ 178 $ — $ 178 Interest rate swap — 727 — 727 Warrant liabilities — — 67,290 67,290

Nonredeemable and Redeemable _2

Nonredeemable and Redeemable Noncontrolling Interest and Stockholders’ Equity (Tables)	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Schedule of Common Stock Issuance and Repurchases	The following is a summary of Class A Common Stock and Class B Common Stock activity for the six months ended June 30, 2022: (in shares) Class A Common Stock Class B Common Stock Balance at December 31, 2021 65,122,200 54,338,114 Issued for warrant exercises 100,009 — Exchange of Class B Common Stock for Class A Common Stock 15,277,696 (15,277,696) Issued for vested RSUs 217,852 — Outstanding at June 30, 2022 80,717,757 39,060,418

Share-Based Compensation (Table

Share-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2022
Share-based Payment Arrangement [Abstract]
Schedule of Restricted Stock Units Activity	The table below summarizes RSU activity for the six months ended June 30, 2022: RSUs Weighted- Average Grant Date Fair Value (per unit) Outstanding at December 31, 2021 851,020 $ 17.23 Granted 707,705 $ 22.22 Vested (1) (316,903) $ 17.23 Forfeited (164,004) $ 18.29 Outstanding at June 30, 2022 1,077,818 $ 20.35 __________________________________________ (1) Vested RSUs include 85,922 units that were not converted into Class A Common Stock due to net share settlements to cover employee withholding taxes. The table below summarizes PSU activity for the six months ended June 30, 2022: PSUs Weighted- Average Grant Date Fair Value (per unit) Outstanding at December 31, 2021 — $ — Granted 364,117 $ 26.75 Forfeited (12,580) $ 26.84 Outstanding at June 30, 2022 351,537 $ 26.75
Schedule of Assumptions to Estimate the Fair Value	The fair value of the ATSR market-based performance objective was determined using Monte Carlo simulations with the following weighted-average assumptions: Stock price $ 22.67 Volatility 49.0 % Risk-free interest rate 2.6 % Grant date fair value per target ATSR PSU $ 28.53

Net Earnings (Loss) Per Share (

Net Earnings (Loss) Per Share (Tables)	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
Schedule of Reconciliation Between Earnings Per Share, Basic and Diluted	The following provides a reconciliation between basic and diluted EPS attributable to Class A Common Stock for the three and six months ended June 30, 2022 and 2021. Three Months Ended June 30, Six Months Ended June 30, (in thousands, except per share amounts) 2022 2021 2022 2021 Net income (loss) attributable to Class A Common shares - basic $ 21,950 $ — $ 3,523 $ — Less gain in fair value of Private Placement Warrants (37,016) — (13,004) — Net income (loss) attributable to Class A Common shares - diluted $ (15,066) $ — $ (9,481) $ — Weighted average number of Class A Common shares outstanding - basic 80,523 — 73,489 — Effect of dilutive Private Placement Warrants 2,922 — 2,715 — Effect of dilutive equity awards — — — — Weighted average number of Class A Common shares outstanding - diluted 83,445 — 76,204 — Net income (loss) per share of Class A Common Stock Basic $ 0.27 $ — $ 0.05 $ — Diluted $ (0.18) $ — $ (0.12) $ —

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	T he following summarizes selected financial information for the Company’s reporting segments: (in thousands) RNG Power Corporate and Other Total Three months ended June 30, 2022 Revenue and other income $ 58,781 $ 15,092 $ 3,346 $ 77,219 Intersegment revenue — 1,366 (1,366) — Total revenue and other income 58,781 16,458 1,980 77,219 Equity investment income, net 2,506 187 — 2,693 Net income (loss) 11,050 1,629 19,945 32,624 Interest expense 1,468 — 2,244 3,712 Depreciation, amortization and accretion 10,966 2,573 191 13,730 Income tax expense — — 129 129 EBITDA $ 23,484 $ 4,202 $ 22,509 $ 50,195 Six months ended June 30, 2022 Revenue and other income $ 97,620 $ 31,941 $ 4,555 $ 134,116 Intersegment revenue — 2,777 (2,777) — Total revenue and other income 97,620 34,718 1,778 134,116 Equity investment income, net 3,544 578 — 4,122 Net income (loss) 24,426 3,274 (28,248) (548) Interest expense 1,995 — 4,371 6,366 Depreciation, amortization and accretion 20,073 5,731 415 26,219 Income tax expense — — 129 129 EBITDA $ 46,494 $ 9,005 $ (23,333) $ 32,166 June 30, 2022 Goodwill $ 29,835 $ — $ — $ 29,835 Three months ended June 30, 2021 Revenue and other income $ 822 $ 2,237 $ 2,068 $ 5,127 Intersegment revenue — — — — Total revenue and other income 822 2,237 2,068 5,127 Net income (loss) (476) (1,830) (5,624) (7,930) Interest expense 13 — — 13 Depreciation, amortization and accretion 202 630 54 886 EBITDA $ (261) $ (1,200) $ (5,570) $ (7,031) Six months ended June 30, 2021 Revenue and other income $ 822 $ 2,237 $ 3,722 $ 6,781 Intersegment revenue — — — — Total revenue and other income 822 2,237 3,722 6,781 Net income (loss) (1,566) (1,830) (7,033) (10,429) Interest expense 19 — — 19 Depreciation, amortization and accretion 215 630 90 935 EBITDA $ (1,332) $ (1,200) $ (6,943) $ (9,475) December 31, 2021 Goodwill $ 29,211 $ — $ — $ 29,211

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Predecessor (Tables)	6 Months Ended
	Jun. 30, 2022
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Schedule of Revenue by Major Source	The following tables display Aria’s revenue by major source and by operating segment for the three and six months ended June 30, 2021 : (in thousands) Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 RNG, including RINs and LCFS credits $ 29,241 $ 55,722 RNG O&M service 367 706 Power, including RECs 10,809 24,626 Power O&M service 1,600 3,430 Other — 24 Total $ 42,017 $ 84,508 Operating segments RNG $ 29,608 $ 56,452 Power 12,409 28,056 Total $ 42,017 $ 84,508

Equity Method Investments - P_2

Equity Method Investments - Predecessor (Tables)	6 Months Ended
	Jun. 30, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Schedule of Equity Method Investments	The summarized financial information for the Mavrix and SGP equity method investments is as follows: (in thousands) June 30, 2022 December 31, 2021 Assets $ 225,978 $ 203,864 Liabilities 51,873 15,477 Net assets $ 174,105 $ 188,387 Company’s share of equity in net assets $ 87,052 $ 94,194 (in thousands) Three Months Ended June 30, 2022 Six Months Ended June 30, 2022 Total revenues $ 26,797 $ 52,025 Net income $ 10,419 $ 18,436 Company’s share of net income $ 5,209 $ 9,218
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Schedule of Equity Method Investments	Summary information on the equity method investments is as follows: (in thousands) June 30, 2021 Assets $ 186,521 Liabilities 14,862 Net assets $ 171,659 Aria’s share of equity in net assets $ 85,299 (in thousands) Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 Revenue $ 29,303 $ 52,902 Net income $ 13,907 $ 25,275 Aria’s share of net income $ 7,469 $ 13,325

Derivative Instruments - Pred_2

Derivative Instruments - Predecessor (Tables)	6 Months Ended
	Jun. 30, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Schedule of Income Statement Effect of Gains (Losses) Related to Derivative Instruments	The following table summarizes the income statement effect of gains and losses related to warrants and derivative instruments for the three and six months ended June 30, 2022 and 2021: Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2022 2021 2022 2021 Gain (loss) on natural gas swap contract $ 116 $ — $ 570 $ — Gain (loss) on interest rate swap contract 963 — 4,606 — Gain (loss) on warrant liabilities 37,016 — 13,004 — Total $ 38,095 $ — $ 18,180 $ —
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Schedule of Income Statement Effect of Gains (Losses) Related to Derivative Instruments	(in thousands) Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 Natural gas swap - unrealized gain (loss) $ 446 $ 556

Benefit Plans - Predecessor (Ta

Benefit Plans - Predecessor (Tables)	6 Months Ended
	Jun. 30, 2022
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Schedule of Net Periodic Benefit Costs Recognized	Net periodic benefit cost recognized in the consolidated statements of comprehensive income was as follows: (in thousands) Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 Service cost $ 9 $ 19 Interest cost 25 45 Amortization of prior service cost 3 6 Recognition of net actuarial loss 16 40 Net periodic benefit cost $ 53 $ 110

Related Party Transactions - _2

Related Party Transactions - Predecessor (Tables)	6 Months Ended
	Jun. 30, 2022
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Schedule of Related Party Transactions	The following is a summary of transactions with these related parties: (in thousands) Three Months Ended June 30, 2021 Six Months Ended June 30, 2021 Sales of construction services $ — $ 24 Sales of operations and maintenance services $ 351 $ 746 Sales of administrative and other services $ 97 $ 195

Segment Reporting - Predecess_2

Segment Reporting - Predecessor (Tables)	6 Months Ended
	Jun. 30, 2022
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Schedule of Segment Reporting Information, by Segment	T he following summarizes selected financial information for the Company’s reporting segments: (in thousands) RNG Power Corporate and Other Total Three months ended June 30, 2022 Revenue and other income $ 58,781 $ 15,092 $ 3,346 $ 77,219 Intersegment revenue — 1,366 (1,366) — Total revenue and other income 58,781 16,458 1,980 77,219 Equity investment income, net 2,506 187 — 2,693 Net income (loss) 11,050 1,629 19,945 32,624 Interest expense 1,468 — 2,244 3,712 Depreciation, amortization and accretion 10,966 2,573 191 13,730 Income tax expense — — 129 129 EBITDA $ 23,484 $ 4,202 $ 22,509 $ 50,195 Six months ended June 30, 2022 Revenue and other income $ 97,620 $ 31,941 $ 4,555 $ 134,116 Intersegment revenue — 2,777 (2,777) — Total revenue and other income 97,620 34,718 1,778 134,116 Equity investment income, net 3,544 578 — 4,122 Net income (loss) 24,426 3,274 (28,248) (548) Interest expense 1,995 — 4,371 6,366 Depreciation, amortization and accretion 20,073 5,731 415 26,219 Income tax expense — — 129 129 EBITDA $ 46,494 $ 9,005 $ (23,333) $ 32,166 June 30, 2022 Goodwill $ 29,835 $ — $ — $ 29,835 Three months ended June 30, 2021 Revenue and other income $ 822 $ 2,237 $ 2,068 $ 5,127 Intersegment revenue — — — — Total revenue and other income 822 2,237 2,068 5,127 Net income (loss) (476) (1,830) (5,624) (7,930) Interest expense 13 — — 13 Depreciation, amortization and accretion 202 630 54 886 EBITDA $ (261) $ (1,200) $ (5,570) $ (7,031) Six months ended June 30, 2021 Revenue and other income $ 822 $ 2,237 $ 3,722 $ 6,781 Intersegment revenue — — — — Total revenue and other income 822 2,237 3,722 6,781 Net income (loss) (1,566) (1,830) (7,033) (10,429) Interest expense 19 — — 19 Depreciation, amortization and accretion 215 630 90 935 EBITDA $ (1,332) $ (1,200) $ (6,943) $ (9,475) December 31, 2021 Goodwill $ 29,211 $ — $ — $ 29,211
Aria Energy LLC
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Schedule of Segment Reporting Information, by Segment	(in thousands) RNG Power Corporate and Other Total Three months ended June 30, 2021 Total revenue $ 28,716 $ 12,347 $ — $ 41,063 Net income (loss) 21,823 63,422 (9,195) 76,050 Depreciation, amortization and accretion 2,284 3,325 12 5,621 Interest expense — — 4,355 4,355 EBITDA $ 24,107 $ 66,747 $ (4,828) $ 86,026 Six Months Ended June 30, 2021 Total Revenue $ 54,669 $ 27,931 $ — $ 82,600 Net income (loss) 38,773 64,925 (18,938) 84,760 Depreciation, amortization and accretion 4,559 6,728 27 11,314 Interest expense — — 8,676 8,676 EBITDA $ 43,332 $ 71,653 $ (10,235) $ 104,750

Organization and Description _3

Organization and Description of Business - Narrative (Details)	6 Months Ended
	Jun. 30, 2022 facility state landfill
Product Information [Line Items]
Number of landfills | landfill	32
Number of states | state	18
Number of non-operational facilities	1
Projects that produce pipeline-quality RNG
Product Information [Line Items]
Number of facilities	13
LFG to electric project
Product Information [Line Items]
Number of facilities	19

Organization and Description _4

Organization and Description of Business - Schedule of Ownership Structure (Details) - Opco - shares	Jun. 30, 2022	Dec. 31, 2021	Sep. 15, 2021
Class A Opco Units
Investment owned balance (in shares)	119,778,175		115,128,930
% Interest
Controlling and noncontrolling interest, ownership percentage	100%		100%
Total controlling interests
Class A Opco Units
Investment owned balance (in shares)	80,717,757		52,847,195
% Interest
Noncontrolling interest, ownership percentage by parent	67.40%	54.50%	45.90%
Total controlling interests | Archaea
Class A Opco Units
Investment owned balance (in shares)	80,717,757		52,847,195
% Interest
Noncontrolling interest, ownership percentage by parent	67.40%		45.90%
Total redeemable noncontrolling interests
Class A Opco Units
Investment owned balance (in shares)	39,060,418		62,281,735
% Interest
Noncontrolling interest, ownership percentage	32.60%	45.50%	54.10%
Total redeemable noncontrolling interests | Aria Holders
Class A Opco Units
Investment owned balance (in shares)	0		23,000,000
% Interest
Noncontrolling interest, ownership percentage	0%		20%
Total redeemable noncontrolling interests | Legacy Archaea Holders
Class A Opco Units
Investment owned balance (in shares)	33,350,385		33,350,385
% Interest
Noncontrolling interest, ownership percentage	27.80%		29%
Total redeemable noncontrolling interests | Sponsor, Atlas and RAC independent directors
Class A Opco Units
Investment owned balance (in shares)	5,710,033		5,931,350
% Interest
Noncontrolling interest, ownership percentage	4.80%		5.20%

Recently Issued and Adopted A_2

Recently Issued and Adopted Accounting Standards (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jan. 01, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 4,654		$ 0
Lease liabilities	$ 4,875
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 5,100
Lease liabilities		$ 5,100

Business Combinations and Rev_2

Business Combinations and Reverse Recapitalization (Details) $ in Millions			6 Months Ended
	Jul. 05, 2022 USD ($)	May 05, 2022 project	Jun. 30, 2022 USD ($)
Business Acquisition [Line Items]
Number of developing projects | project		39
Aria Energy LLC
Business Acquisition [Line Items]
Consideration adjustment			$ (1.9)
Other purchase price adjustment			$ 2.5
Subsequent Event
Business Acquisition [Line Items]
Capital funding amount	$ 222.5
Subsequent Event | Lightning Joint Venture
Business Acquisition [Line Items]
Payments to acquire assets	$ 37.9
Lightning Joint Venture
Business Acquisition [Line Items]
Number of developing projects | project		40
Lightning Joint Venture | Subsequent Event
Business Acquisition [Line Items]
Noncontrolling interest, ownership percentage by parent	60%

Revenues - Disaggregation of Re

Revenues - Disaggregation of Revenue by Product Type (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue from External Customer [Line Items]
Revenue	$ 74,450	$ 5,127	$ 128,580	$ 6,781
RNG
Revenue from External Customer [Line Items]
Revenue	55,328	821	90,415	821
Power
Revenue from External Customer [Line Items]
Revenue	15,846	2,238	33,610	2,238
Corporate and Other
Revenue from External Customer [Line Items]
Revenue	3,276	2,068	4,555	3,722
RNG, including RINs and LCFS credits
Revenue from External Customer [Line Items]
Revenue	55,086	821	89,883	821
RNG O&M service
Revenue from External Customer [Line Items]
Revenue	242	0	532	0
Power, including RECs
Revenue from External Customer [Line Items]
Revenue	14,893	2,238	31,759	2,238
Power O&M service
Revenue from External Customer [Line Items]
Revenue	953	0	1,851	0
Equipment and associated services
Revenue from External Customer [Line Items]
Revenue	2,808	2,068	4,022	3,722
Other
Revenue from External Customer [Line Items]
Revenue	$ 468	$ 0	$ 533	$ 0

Revenues - Contract Assets and

Revenues - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Contract assets (included in Prepaid expenses and other current assets)	$ 168	$ 87
Contract liabilities (included in Accrued and other current liabilities)	$ (270)	$ (505)

Revenues - Narrative (Details)

Revenues - Narrative (Details) $ in Millions	Jun. 30, 2022 USD ($)
Revenue from Contract with Customer [Abstract]
Capitalized contract cost	$ 2.5

Revenues -Revenue Expected to b

Revenues -Revenue Expected to be Recognized on Remaining Performance Obligations (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Revenue from External Customer [Line Items]
Remaining performance obligation	$ 3,899,787
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue from External Customer [Line Items]
Remaining performance obligation	$ 42,026
Remaining performance obligation term	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue from External Customer [Line Items]
Remaining performance obligation	$ 262,001
Remaining performance obligation term	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue from External Customer [Line Items]
Remaining performance obligation	$ 429,996
Remaining performance obligation term	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue from External Customer [Line Items]
Remaining performance obligation	$ 441,067
Remaining performance obligation term	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Revenue from External Customer [Line Items]
Remaining performance obligation	$ 434,641
Remaining performance obligation term	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2031-01-01
Revenue from External Customer [Line Items]
Remaining performance obligation	$ 418,453
Remaining performance obligation term	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2033-01-01
Revenue from External Customer [Line Items]
Remaining performance obligation	$ 1,871,603
Remaining performance obligation term

Property, Plant, and Equipmen_2

Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 479,413	$ 358,218
Less accumulated depreciation	(19,073)	(7,635)
Property, plant and equipment, net	460,340	350,583
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	307,808	285,718
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	17,517	16,039
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,326	1,176
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	151,496	55,039
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 266	$ 246

Equity Method Investments - Nar

Equity Method Investments - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended	6 Months Ended
	Jun. 30, 2022	Dec. 30, 2021	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 263,336		$ 263,336	$ 263,336	$ 262,738
Mavrix
Schedule of Equity Method Investments [Line Items]
Membership percentage						50%
Earn-out payment	8,300
Carrying value basis difference	$ 154,500		154,500	154,500
Amortization of basis difference			$ 2,600	$ 5,100
Mavrix | Maximum
Schedule of Equity Method Investments [Line Items]
Earn-out payment obligation						$ 9,550
Mavrix | Two Joint Ventures
Schedule of Equity Method Investments [Line Items]
Interest in joint ventures	50%		50%	50%
Saturn
Schedule of Equity Method Investments [Line Items]
Contributions to equity method investments		$ 7,500		$ 8,000
Carrying value of joint venture	$ 15,500		$ 15,500	15,500
Saturn | Saturn
Schedule of Equity Method Investments [Line Items]
Interest in joint ventures		50%
Smaller Investments
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 7,100		$ 7,100	$ 7,100	$ 7,100

Equity Method Investments - Bal

Equity Method Investments - Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Assets	$ 1,712,523	$ 1,451,189
Liabilities	872,582	620,196
Mavrix and Sunshine Gas Producers
Schedule of Equity Method Investments [Line Items]
Assets	225,978	203,864
Liabilities	51,873	15,477
Net assets	174,105	188,387
Company’s share of equity in net assets	$ 87,052	$ 94,194

Equity Method Investments - Inc

Equity Method Investments - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule of Equity Method Investments [Line Items]
Total revenues	$ 77,219	$ 5,127	$ 134,116	$ 6,781
Mavrix and Sunshine Gas Producers
Schedule of Equity Method Investments [Line Items]
Total revenues	26,797		52,025
Net income	10,419		18,436
Company’s share of net income	$ 5,209		$ 9,218

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 29,835		$ 29,835		$ 29,211
Goodwill impairment			0
Amortization expense	8,300	$ 25	16,500	$ 50
Amortization of intangibles and below-market contracts	3,700		7,400
RNG purchase contract
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1,700		$ 3,300

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 658,382	$ 649,789
Accumulated Amortization	31,159	11,318
Net	627,223	638,471
Biogas rights agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	612,461	603,868
Accumulated Amortization	22,814	8,237
Net	589,647	595,631
Electricity off-take agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	26,511	26,511
Accumulated Amortization	2,344	749
Net	24,167	25,762
O&M contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,620	8,620
Accumulated Amortization	460	173
Net	8,160	8,447
RNG purchase contract
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,290	10,290
Accumulated Amortization	5,291	1,959
Net	4,999	8,331
Trade names and customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	500	500
Accumulated Amortization	250	200
Net	$ 250	$ 300

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Below-Market Contracts (Details) - Below-Market Contract - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Liability	$ 146,990	$ 146,990
Accumulated Amortization	11,780	4,360
Net	$ 135,210	$ 142,630

Accrued and Other Current Lia_3

Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Payables and Accruals [Abstract]
Accrued expenses	$ 30,377	$ 16,638
Accrued capital expenditures	22,760	16,609
Derivative liabilities	55	771
Payroll and related costs	6,875	7,683
Accrued interest	70	738
Contract liabilities	270	505
Other current liabilities	3,200	3,335
Total	$ 63,607	$ 46,279

Debt - Narrative (Details)

Debt - Narrative (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt outstanding	$ 580,495,000	$ 351,995,000
Estimated fair value of outstanding debt	523,000,000	353,100,000
Amended Facilities
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	1,100,000,000
Increase in credit facility	630,000,000
Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Long-term debt outstanding	50,000,000	0
Line of credit | Credit Agreement | Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	250,000,000
Long-term debt outstanding	$ 50,000,000
Debt instrument, interest rate	4.39%
Issued letters of credit	$ 23,800,000
Borrowing capacity	$ 626,200,000
Line of credit | Credit Agreement | Revolving credit facility | SOFR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	2.75%
Line of credit | Amended Facilities | Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 700,000,000
Secured debt
Debt Instrument [Line Items]
Long-term debt outstanding	400,000,000	$ 218,625,000
Secured debt | Credit Agreement
Debt Instrument [Line Items]
Debt instrument, principal amount	220,000,000
Long-term debt outstanding	$ 400,000,000
Debt instrument, interest rate	4.89%
Secured debt | Credit Agreement | SOFR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	3.25%
Secured debt | Amended Facilities
Debt Instrument [Line Items]
Debt instrument, principal amount	$ 400,000,000

Debt - Schedule of Long-Term De

Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt, gross	$ 580,495	$ 351,995
Less unamortized debt issuance costs	(10,027)	(9,221)
Long-term debt less debt issuance costs	570,468	342,774
Less current maturities, net	(21,568)	(11,378)
Total long-term debt, net	548,900	331,396
Secured debt
Debt Instrument [Line Items]
Long-term debt, gross	400,000	218,625
Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Long-term debt, gross	$ 50,000	0
Senior secured notes | Wilmington Trust – 4.47% Term Note
Debt Instrument [Line Items]
Debt instrument, interest rate	4.47%
Long-term debt, gross	$ 60,828	60,828
Senior secured notes | Wilmington Trust – 3.75% Term Note
Debt Instrument [Line Items]
Debt instrument, interest rate	3.75%
Long-term debt, gross	$ 69,667	$ 72,542

Debt - Schedule of Future Matur

Debt - Schedule of Future Maturities of Long-Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Remainder of 2022	$ 10,502
2023	26,108
2024	26,371
2025	26,598
2026 and thereafter	490,916
Total	$ 580,495	$ 351,995

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lessee, Lease, Description [Line Items]
Total lease costs	$ 800		$ 1,600
Operating lease expense	300		700
Short-term operating lease expense	400		900
Rent expense		$ 300		$ 400
Lease commitment, not yet commenced	8,300		8,300
Gulf Coast Environmental Systems, LLC ("GCES") | Affiliated Entity
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 0		$ 70
Rent expense		$ 53		$ 105
Minimum
Lessee, Lease, Description [Line Items]
Lease term	1 year		1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term	11 years		11 years

Leases - ROU Assets and Operati

Leases - ROU Assets and Operating Lease Liabilities (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Leases [Abstract]
Operating cash outflows for operating leases	$ 1,346
Weighted average remaining lease term (in years)	8 years 10 months 24 days
Weighted average discount rate	5%

Leases - Future Lease Payments

Leases - Future Lease Payments (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Leases [Abstract]
Remainder of 2022	$ 602
2023	625
2024	609
2025	589
2026	533
2027	546
Thereafter	2,576
Total future lease payments	6,080
Less portion representing imputed interest	(1,205)
Total operating lease liabilities	$ 4,875

Derivative Instruments - Narrat

Derivative Instruments - Narrative (Details) $ / shares in Units, $ in Millions	1 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2022 USD ($) MMBTU $ / shares shares	Dec. 31, 2024 USD ($)	Dec. 31, 2021
Natural Gas Swap
Class of Warrant or Right [Line Items]
Notional quantity, natural gas variable to fixed price swap agreement (energy) | MMBTU		219,000
Interest rate swap
Class of Warrant or Right [Line Items]
Derivative, fixed interest rate (in percentage)				1.094%
Interest rate swap notional | $	$ 107.9	$ 107.9
Interest rate swap | Forecast
Class of Warrant or Right [Line Items]
Interest rate swap notional | $			$ 94.9
Class A Units
Class of Warrant or Right [Line Items]
Conversion of warrants to common stock (in shares)	100,009	100,009
Private Placement
Class of Warrant or Right [Line Items]
Warrants exercised on cashless basis (in shares)	234,399	234,399
Warrant exercise price (in usd per share) | $ / shares	$ 11.50	$ 11.50
Warrants outstanding (in shares)	6,536,601	6,536,601
Private Placement | Class A Units
Class of Warrant or Right [Line Items]
Conversion of warrants to common stock (in shares)		1

Derivative Instruments - Estima

Derivative Instruments - Estimated Fair Value (Details) - Private Placement	Jun. 30, 2022 yr $ / shares	Dec. 31, 2021 yr $ / shares
Stock price
Class of Warrant or Right [Line Items]
Private Placement Warrants Measurement Inputs	15.53	18.28
Exercise price
Class of Warrant or Right [Line Items]
Private Placement Warrants Measurement Inputs	11.50	11.50
Volatility
Class of Warrant or Right [Line Items]
Private Placement Warrants Measurement Inputs	0.495	0.460
Expected term (years)
Class of Warrant or Right [Line Items]
Private Placement Warrants Measurement Inputs | yr	4.2	4.7
Risk-free interest rate
Class of Warrant or Right [Line Items]
Private Placement Warrants Measurement Inputs	0.030	0.012

Derivative Instruments - Fair V

Derivative Instruments - Fair Value of Warrant Liabilities (Details) - Public And Private Placement Warrants $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Warrant liabilities	$ 67,290
Change in fair value	(13,004)
Less fair value of warrants exercised	(1,556)
Warrant liabilities	$ 52,730

Derivative Instruments - Balanc

Derivative Instruments - Balance Sheet Classification of Fair Value of Derivative Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total derivative assets	$ 4,965	$ 439
Accrued and other current liabilities	55	771
Derivative liabilities	52,730	67,424
Total derivative liabilities	52,785	68,195
Natural Gas Swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Prepaid expenses and other current assets	245	0
Accrued and other current liabilities	55	44
Derivative liabilities	0	134
Interest rate swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Prepaid expenses and other current assets	1,906	0
Other non-current assets	2,814	439
Accrued and other current liabilities	0	727
Warrant
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities	$ 52,730	$ 67,290

Derivative Instruments - Income

Derivative Instruments - Income Statement Effect of Gains and Losses Related to Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on warrants and derivative contracts	$ 38,095	$ 0	$ 18,180	$ 0
Natural Gas Swap | Gain (loss) on natural gas swap contract | Swap Contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on warrants and derivative contracts	116	0	570	0
Interest rate swap | Gain (loss) on interest rate swap contract | Swap Contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on warrants and derivative contracts	963	0	4,606	0
Warrant Liability | Gain (loss) on warrant liabilities | Warrant
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on warrants and derivative contracts	$ 37,016	$ 0	$ 13,004	$ 0

Fair Value Measurements - Deriv

Fair Value Measurements - Derivative Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets	$ 4,965	$ 439
Total derivative liabilities	52,785	68,195
Fair Value, Recurring | Natural gas swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets	245
Total derivative liabilities	55	178
Fair Value, Recurring | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative assets	4,720	439
Total derivative liabilities		727
Fair Value, Recurring | Warrant liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative liabilities	52,730	67,290
Level 1 | Fair Value, Recurring | Natural gas swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Before Netting	0
Total Fair Value, Liability	0	0
Level 1 | Fair Value, Recurring | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Before Netting	0	0
Total Fair Value, Liability		0
Level 1 | Fair Value, Recurring | Warrant liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Fair Value, Liability	0	0
Level 2 | Fair Value, Recurring | Natural gas swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Before Netting	245
Total Fair Value, Liability	55	178
Level 2 | Fair Value, Recurring | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Before Netting	4,720	439
Total Fair Value, Liability		727
Level 2 | Fair Value, Recurring | Warrant liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Fair Value, Liability	0	0
Level 3 | Fair Value, Recurring | Natural gas swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Before Netting	0
Total Fair Value, Liability	0	0
Level 3 | Fair Value, Recurring | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Before Netting	0	0
Total Fair Value, Liability		0
Level 3 | Fair Value, Recurring | Warrant liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Fair Value, Liability	$ 52,730	$ 67,290

Nonredeemable and Redeemable _3

Nonredeemable and Redeemable Noncontrolling Interest and Stockholders’ Equity - Narrative (Details) - shares	1 Months Ended	6 Months Ended
	Mar. 31, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 15, 2021
Class A Units
Class of Stock [Line Items]
Number of shares sold (in shares)	14,942,643
Exchange of Class B Common Stock for Class A Common Stock (in shares)		15,277,696
Class A Units | Conversion of Class B to Class A
Class of Stock [Line Items]
Exchange of Class B Common Stock for Class A Common Stock (in shares)		14,942,643
Class B Units
Class of Stock [Line Items]
Exchange of Class B Common Stock for Class A Common Stock (in shares)		(15,277,696)
Class B Units | Conversion of Class B to Class A
Class of Stock [Line Items]
Exchange of Class B Common Stock for Class A Common Stock (in shares)		(14,942,643)
Opco | Total controlling interests
Class of Stock [Line Items]
Noncontrolling interest, ownership percentage by parent		67.40%	54.50%	45.90%
Opco | Nonredeemable Noncontrolling Interests
Class of Stock [Line Items]
Ownership percentage by noncontrolling owners		32.60%	45.50%	54.10%

Nonredeemable and Redeemable _4

Nonredeemable and Redeemable Noncontrolling Interest and Stockholders’ Equity - Common Stock Issued and Repurchased (Details)	6 Months Ended
	Jun. 30, 2022 shares
Class A Units
Common Stock Issued And Repurchased [Roll Forward]
Beginning balance (in shares)	65,122,200
Exchange of Class B Common Stock for Class A Common Stock (in shares)	15,277,696
Issued for vested RSUs (in shares)	217,852
Ending balance (in shares)	80,717,757
Class B Units
Common Stock Issued And Repurchased [Roll Forward]
Beginning balance (in shares)	54,338,114
Issued for warrant exercises (in shares)	0
Exchange of Class B Common Stock for Class A Common Stock (in shares)	(15,277,696)
Issued for vested RSUs (in shares)	0
Ending balance (in shares)	39,060,418

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Details) - USD ($) $ in Millions		1 Months Ended		2 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Feb. 28, 2022	Jan. 31, 2022	May 31, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Omnibus Incentive Plan (the "Plan")
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	11,300,000				11,300,000		11,300,000
Shares available for future issuance (in shares)	9,600,000				9,600,000		9,600,000
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted (in shares)			41,028		666,677		707,705
Vesting period					3 years
Number of unvested awards (in shares)		158,583
Incremental share-based compensation expense		$ 2.9
Share-based compensation expense					$ 2.4	$ 0	$ 8.2	$ 0
Unrecognized compensation expense	$ 19.1				19.1	0	$ 19.1	0
Weighted average expected period of recognition							1 year 7 months 6 days
RSUs | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted (in shares)				364,117			364,117
Vesting period				3 years
Share-based compensation expense					0.8		$ 0.8
Unrecognized compensation expense	$ 8.6				$ 8.6		$ 8.6
Weighted average expected period of recognition	2 years 8 months 12 days
Performance period				3 years
PSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting, percentage				0%
PSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting, percentage				200%
PSUs | Average Cash Return On Investment
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance payout rate	100%				100%		100%
Series A unit awards | Series A Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense						$ 0.1		$ 0.2

Share-Based Compensation - Sche

Share-Based Compensation - Schedule of RSU Activity (Details) - $ / shares	1 Months Ended	2 Months Ended	3 Months Ended	6 Months Ended
	Jan. 31, 2022	May 31, 2022	Jun. 30, 2022	Jun. 30, 2022
RSUs
Restricted Stock Units [Roll Forward]
Nonvested beginning balance (in shares)	851,020			851,020
Granted (in shares)	41,028		666,677	707,705
Vested (in shares)				(316,903)
Forfeited (in shares)				(164,004)
Nonvested ending balance (in shares)			1,077,818	1,077,818
Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested beginning balance (in USD per share)	$ 17.23			$ 17.23
Granted (in USD per share)				22.22
Vested (in USD per share)				17.23
Forfeited (in USD per share)				18.29
Nonvested ending balance (in USD per share)			$ 20.35	$ 20.35
RSUs | Class A Units
Weighted Average Grant Date Fair Value [Roll Forward]
Shares vested but not converted into Class A Common Stock (in shares)				85,922
PSUs
Restricted Stock Units [Roll Forward]
Nonvested beginning balance (in shares)	0			0
Granted (in shares)		364,117		364,117
Forfeited (in shares)				(12,580)
Nonvested ending balance (in shares)			351,537	351,537
Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested beginning balance (in USD per share)	$ 0			$ 0
Granted (in USD per share)				26.75
Forfeited (in USD per share)				26.84
Nonvested ending balance (in USD per share)			$ 26.75	$ 26.75

Share-Based Compensation - Sc_2

Share-Based Compensation - Schedule of Valuation Assumptions (Details) - PSUs - $ / shares	2 Months Ended
	May 31, 2022	Apr. 04, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price (in usd per share)		$ 22.67
Volatility	49%
Risk-free interest rate	2.60%
Grant date fair value per target ATSR PSU	$ 28.53

Provision for Income Tax - Narr

Provision for Income Tax - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Sep. 15, 2021
Income Tax Examination [Line Items]
Income tax expense	$ 129	$ 0	$ 129	$ 0
Effective income tax rate	0%	0%	(23.60%)	0%
Opco | Total controlling interests
Income Tax Examination [Line Items]
Noncontrolling interest, ownership percentage by parent	67.40%		67.40%		54.50%	45.90%
Opco | Total controlling interests | Archaea
Income Tax Examination [Line Items]
Noncontrolling interest, ownership percentage by parent	67.40%		67.40%			45.90%

Net Earnings (Loss) Per Share -

Net Earnings (Loss) Per Share - Reconciliation between Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2022		Jun. 30, 2021		Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to Class A Common shares - basic		$ 21,950				$ 3,523
Class A Common Stock, Average number of shares outstanding - basic (in shares)	[1]			0		73,488,555	0
Effect of dilutive equity awards (in shares)		0		0		0	0
Class A Common Stock, Average number of shares outstanding - diluted (in shares)	[1]	83,445,455		0		76,203,753	0
Net income (loss) per share of Class A Common Stock
Basic (in usd per share)	[1]	$ 0.27		$ 0		$ 0.05	$ 0
Diluted (in usd per share)		$ (0.18)		$ 0	[1]	$ (0.12)	$ 0	[1]
Private Placement Warrants
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Less gain in fair value of Private Placement Warrants		$ (37,016)		$ 0		$ (13,004)	$ 0
Effect of dilutive Private Placement Warrants (in shares)		2,922,000		0		2,715,000	0
Class A Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to Class A Common shares - basic		$ 21,950		$ 0		$ 3,523	$ 0
Net income (loss) attributable to Class A Common shares - diluted		$ (15,066)		$ 0		$ (9,481)	$ 0
Class A Common Stock, Average number of shares outstanding - basic (in shares)		80,522,737	[1]	0		73,489,000	0
Class A Common Stock, Average number of shares outstanding - diluted (in shares)		83,445,000		0		76,204,000	0
[1]Class A Common Stock is outstanding beginning September 15, 2021 due to the reverse recapitalization transaction as described in “Note 4 - Business Combinations and Reverse Recapitalization.”

Net Earnings (Loss) Per Share_2

Net Earnings (Loss) Per Share - Narrative (Details) - shares	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022
Restricted Stock Units (RSUs) And Performance Stock Units (PSUs)
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Common stock, excluded due to anti-dilutive effect (in shares)	1,403,593	1,113,242

Segment Information - Narrative

Segment Information - Narrative (Details) - segment	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting [Abstract]
Reporting segment	2	2	2	2

Segment Information - Financial

Segment Information - Financial Information For Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total revenues	$ 77,219	$ 5,127	$ 134,116	$ 6,781
Equity Investment Income, Net	2,693	0	4,122	0
Net income (loss)	32,624	(7,930)	(548)	(10,429)
Interest expense	3,712	13	6,366	19
Depreciation, amortization and accretion expense	13,730	886	26,219	935
Income tax expense	129	0	129	0
EBITDA	50,195	(7,031)	32,166	(9,475)
Goodwill	29,835		29,835		$ 29,211
Operating Segments
Segment Reporting Information [Line Items]
Total revenues	77,219	5,127	134,116	6,781
Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
RNG
Segment Reporting Information [Line Items]
Total revenues	58,781	822	97,620	822
Equity Investment Income, Net	2,506		3,544
Net income (loss)	11,050	(476)	24,426	(1,566)
Interest expense	1,468	13	1,995	19
Depreciation, amortization and accretion expense	10,966	202	20,073	215
Income tax expense	0		0
EBITDA	23,484	(261)	46,494	(1,332)
Goodwill	29,835		29,835		29,211
RNG | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	58,781	822	97,620	822
RNG | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Power
Segment Reporting Information [Line Items]
Total revenues	16,458	2,237	34,718	2,237
Equity Investment Income, Net	187		578
Net income (loss)	1,629	(1,830)	3,274	(1,830)
Interest expense	0	0	0	0
Depreciation, amortization and accretion expense	2,573	630	5,731	630
Income tax expense	0		0
EBITDA	4,202	(1,200)	9,005	(1,200)
Goodwill	0		0		0
Power | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	15,092	2,237	31,941	2,237
Power | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	1,366	0	2,777	0
Corporate and Other
Segment Reporting Information [Line Items]
Total revenues	1,980	2,068	1,778	3,722
Equity Investment Income, Net	0		0
Net income (loss)	19,945	(5,624)	(28,248)	(7,033)
Interest expense	2,244	0	4,371	0
Depreciation, amortization and accretion expense	191	54	415	90
Income tax expense	129		129
EBITDA	22,509	(5,570)	(23,333)	(6,943)
Goodwill	0		0		$ 0
Corporate and Other | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	3,346	2,068	4,555	3,722
Corporate and Other | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	$ (1,366)	$ 0	$ (2,777)	$ 0

Related Party Transactions - Na

Related Party Transactions - Narrative (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)
Related Party Transaction [Line Items]
Payables to related party	$ 6.1	$ 6.1
Revenue and other income	0.7	1
Certain Joint Ventures
Related Party Transaction [Line Items]
Receivable from related party	$ 0.5	0.5
Affiliated Entity | RNG Plant Construction Contract
Related Party Transaction [Line Items]
Contract price		19.9
Related-party reimbursement		$ 4.6
Lutum Technologies LLC
Related Party Transaction [Line Items]
Ownership interest	20%	20%
Amount paid	$ 0.7	$ 0.7

Subsequent Events (Details)

Subsequent Events (Details) - NextGen Power Holdings LLC $ in Millions		3 Months Ended	6 Months Ended
	Jul. 15, 2022 USD ($) landfillGas	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)
Subsequent Event [Line Items]
Acquisition related costs		$ 1.6	$ 2.3
Subsequent Event
Subsequent Event [Line Items]
Consideration transferred	$ 230.5
Percentage of voting interests acquired	100%
Number of facilities owned | landfillGas	14

Description of Business - Pre_2

Description of Business - Predecessor (Details)	Sep. 14, 2021
Ares EIF Management LLC | Total controlling interests | Aria Energy LLC
Product Information [Line Items]
Noncontrolling interest, ownership percentage by parent	94.35%

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Predecessor - Narrative (Details) - Aria Energy LLC - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Jun. 10, 2021	Jun. 30, 2021	Jun. 30, 2021
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Percent of revenue, ASC 606			36%
Percent of revenue, ASC 840			64%
Proceeds from sale of assets held for sale	$ 58,500
Gain on extinguishment of debt	$ 61,400	$ 61,411	$ 61,411
Gain on sale of assets		1,300	1,300
LESPH
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net gain (loss) from sale of LESPH		$ 69,000	$ 67,100

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Predecessor - Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue from External Customer [Line Items]
Revenue	$ 74,450	$ 5,127	$ 128,580	$ 6,781
Aria Energy LLC
Revenue from External Customer [Line Items]
Revenue		42,017		84,508
Aria Energy LLC | RNG
Revenue from External Customer [Line Items]
Revenue		29,608		56,452
Aria Energy LLC | Power
Revenue from External Customer [Line Items]
Revenue		12,409		28,056
RNG, including RINs and LCFS credits
Revenue from External Customer [Line Items]
Revenue	55,086	821	89,883	821
RNG, including RINs and LCFS credits | Aria Energy LLC
Revenue from External Customer [Line Items]
Revenue		29,241		55,722
RNG O&M service
Revenue from External Customer [Line Items]
Revenue	242	0	532	0
RNG O&M service | Aria Energy LLC
Revenue from External Customer [Line Items]
Revenue		367		706
Power, including RECs
Revenue from External Customer [Line Items]
Revenue	14,893	2,238	31,759	2,238
Power, including RECs | Aria Energy LLC
Revenue from External Customer [Line Items]
Revenue		10,809		24,626
Power O&M service
Revenue from External Customer [Line Items]
Revenue	953	0	1,851	0
Power O&M service | Aria Energy LLC
Revenue from External Customer [Line Items]
Revenue		1,600		3,430
Other
Revenue from External Customer [Line Items]
Revenue	$ 468	0	$ 533	0
Other | Aria Energy LLC
Revenue from External Customer [Line Items]
Revenue		$ 0		$ 24

Equity Method Investments - P_3

Equity Method Investments - Predecessor - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021	Sep. 30, 2017
Mavrix
Schedule of Equity Method Investments [Line Items]
Membership percentage			50%
Aria Energy LLC | Mavrix
Schedule of Equity Method Investments [Line Items]
Membership percentage			50%
Earn-out payment obligation		$ 1,700	$ 9,550
Two Joint Ventures | Aria Energy LLC | Mavrix and Sunshine Gas Producers
Schedule of Equity Method Investments [Line Items]
Interest in joint ventures		50%
Four Joint Ventures | Aria Energy LLC | Riverview Energy Systems, Adrian Energy Systems, Salem Energy Systems and Salt Lake Energy Systems
Schedule of Equity Method Investments [Line Items]
Interest in joint ventures	50%

Equity Method Investments - P_4

Equity Method Investments - Predecessor - Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Schedule of Equity Method Investments [Line Items]
Assets	$ 1,712,523	$ 1,451,189
Liabilities	872,582	620,196
Mavrix and Sunshine Gas Producers
Schedule of Equity Method Investments [Line Items]
Assets	225,978	203,864
Liabilities	51,873	15,477
Net assets	174,105	188,387
Company’s share of equity in net assets	$ 87,052	$ 94,194
Mavrix and Sunshine Gas Producers | Aria Energy LLC
Schedule of Equity Method Investments [Line Items]
Assets			$ 186,521
Liabilities			14,862
Net assets			171,659
Company’s share of equity in net assets			$ 85,299

Equity Method Investments - P_5

Equity Method Investments - Predecessor - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule of Equity Method Investments [Line Items]
Total revenues	$ 77,219	$ 5,127	$ 134,116	$ 6,781
Aria Energy LLC
Schedule of Equity Method Investments [Line Items]
Total revenues		41,063		82,600
Aria’s share of net income		76,050		84,760
Mavrix and Sunshine Gas Producers
Schedule of Equity Method Investments [Line Items]
Total revenues	26,797		52,025
Net income	10,419		18,436
Aria’s share of net income	$ 5,209		$ 9,218
Mavrix and Sunshine Gas Producers | Aria Energy LLC
Schedule of Equity Method Investments [Line Items]
Total revenues		29,303		52,902
Net income		13,907		25,275
Aria’s share of net income		$ 7,469		$ 13,325

Derivative Instruments - Pred_3

Derivative Instruments - Predecessor - Narrative (Details) - Aria Energy LLC - Interest Rate Cap - USD ($)	Jun. 30, 2021	Apr. 30, 2020	Apr. 06, 2020
Class of Warrant or Right [Line Items]
Derivative, notional amount			$ 110,000,000
Derivative, fixed interest rate (in percentage)		1%
Debt instrument market value	$ 0

Derivative Instruments - Pred_4

Derivative Instruments - Predecessor - Schedule of Unrealized Gain (Loss) of Natural Gas Swaps (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Aria Energy LLC | Natural Gas Swap
Derivative [Line Items]
Unrealized gain (loss)	$ 446	$ 556

Benefit Plans - Predecessor - 4

Benefit Plans - Predecessor - 401 (k) Plans (Details) - Aria Energy LLC	6 Months Ended
	Jun. 30, 2021
Pension Plan, First Contribution
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution	100%
Employer matching contribution, percent of employees eligible compensation	3%
Pension Plan, Next Contribution
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution	50%
Employer matching contribution, percent of employees eligible compensation	2%

Benefit Plans - Predecessor - D

Benefit Plans - Predecessor - Defined Benefit Healthcare (Details) - Aria Energy LLC - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 9	$ 19
Interest cost	25	45
Amortization of prior service cost	3	6
Recognition of net actuarial loss	16	40
Net periodic benefit cost	$ 53	$ 110

Related Party Transactions - _3

Related Party Transactions - Predecessor - Narrative (Details)	Jun. 30, 2021
Two Joint Ventures | Mavrix and Sunshine Gas Producers | Aria Energy LLC
Related Party Transaction [Line Items]
Noncontrolling interest, ownership percentage by parent	50%

Related Party Transactions - _4

Related Party Transactions - Predecessor - Aria Related Party Transactions (Details) - Aria Energy LLC - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Related Party Transaction [Line Items]
Sales of construction services	$ 0	$ 24
Sales of operations and maintenance services	351	746
Sales of administrative and other services	$ 97	$ 195

Segment Reporting - Predecess_3

Segment Reporting - Predecessor - Aria Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Total revenues	$ 77,219	$ 5,127	$ 134,116	$ 6,781
Depreciation, amortization and accretion	13,730	886	26,219	935
EBITDA	50,195	(7,031)	32,166	(9,475)
Aria Energy LLC
Segment Reporting Information [Line Items]
Total revenues		41,063		82,600
Aria’s share of net income		76,050		84,760
Depreciation, amortization and accretion		5,621		11,314
Interest expense		4,355		8,676
EBITDA		86,026		104,750
RNG
Segment Reporting Information [Line Items]
Total revenues	58,781	822	97,620	822
EBITDA	23,484	(261)	46,494	(1,332)
RNG | Aria Energy LLC
Segment Reporting Information [Line Items]
Total revenues		28,716		54,669
Aria’s share of net income		21,823		38,773
Depreciation, amortization and accretion		2,284		4,559
Interest expense		0		0
EBITDA		24,107		43,332
Power
Segment Reporting Information [Line Items]
Total revenues	16,458	2,237	34,718	2,237
EBITDA	4,202	(1,200)	9,005	(1,200)
Power | Aria Energy LLC
Segment Reporting Information [Line Items]
Total revenues		12,347		27,931
Aria’s share of net income		63,422		64,925
Depreciation, amortization and accretion		3,325		6,728
Interest expense		0		0
EBITDA		66,747		71,653
Corporate and Other
Segment Reporting Information [Line Items]
Total revenues	1,980	2,068	1,778	3,722
EBITDA	$ 22,509	(5,570)	$ (23,333)	(6,943)
Corporate and Other | Aria Energy LLC
Segment Reporting Information [Line Items]
Total revenues		0		0
Aria’s share of net income		(9,195)		(18,938)
Depreciation, amortization and accretion		12		27
Interest expense		4,355		8,676
EBITDA		$ (4,828)		$ (10,235)