OPAL / OPAL Fuels Inc. - SEC फाइलिंग, वार्षिक रिपोर्ट, प्रॉक्सी स्टेटमेंट

ओपल फ्यूल्स इंक.
US ˙ NasdaqCM ˙ US68347P1030

मूलभूत आँकड़े
CIK 1842279
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to OPAL Fuels Inc.
SEC Filings (Chronological Order)
यह पृष्ठ SEC फाइलिंग की एक पूरी, कालानुक्रमिक सूची प्रदान करता है, ओनरशिप फाइलिंग को छोड़कर, जो हम अन्यत्र प्रदान करते हैं।
August 7, 2025 EX-99.1

OPAL Fuels Reports Second Quarter 2025 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports Second Quarter 2025 Results WHITE PLAINS, N.

August 7, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-40272 OPAL FUELS

August 7, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2025 OPAL Fuels Inc. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2025 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

June 18, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 18, 2025 OPAL Fuels Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 18, 2025 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1578

May 13, 2025 EX-10.6

imited Liability Company Agreeme

Exhibit 10.6 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW LIMITED LIABILITY COMPANY AGREEMENT OF [***] This Limited Liability Company Agreement (this “Agreement”) of [***], a Delaware limited liability com

May 13, 2025 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 Commission File Number: 001-40272 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 Commission File Number: 001-40272 NOTIFICATION OF LATE FILING ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-CEN ☐ Form N-CSR For Period Ended: March 31, 2025 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on Form 10-Q For

May 13, 2025 EX-10.5

Option Agreement, dated March 17, 2025, between Wasatch RNG LLC and OPAL Fuels LLC

Exhibit 10.5 OPTION AGREEMENT This Option Agreement (this “Agreement”), dated March 17, 2025, is made and entered into by and between Wasatch RNG LLC, a Delaware limited liability company (“Wasatch RNG”), and OPAL Fuels LLC, a Delaware limited liability company (or one of its direct or indirect subsidiaries) (“Opal”). Each of the parties to this Agreement is sometimes individually referred to in t

May 13, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-40272 OPAL FUEL

May 13, 2025 EX-10.4

First Amendment to Administrative Services Agreement, dated March 17, 2025 between Fortistar Services 2 LLC and OPAL Fuels LLC

Exhibit 10.4 FIRST AMENDMENT TO ADMINISTRATIVE SERVICES AGREEMENT THIS FIRST AMENDMENT (this “Amendment”), dated as of March 17, 2025 supplements and amends the Administrative Services Agreement, dated as of December 31, 2020 (hereinafter referred to, as amended, supplemented and modified from time to time in accordance with the terms thereof, together with all Exhibits attached or to be attached

May 8, 2025 EX-99.1

OPAL Fuels Reports First Quarter 2025 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports First Quarter 2025 Results WHITE PLAINS, N.

May 8, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2025 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157835

April 25, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

April 25, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 21, 2025 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

April 25, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

April 24, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 24, 2025 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

April 24, 2025 EX-99.1

OPAL Fuels Announces First Quarter 2025 Earnings Release Date and Conference Call

FOR IMMEDIATE RELEASE OPAL Fuels Announces First Quarter 2025 Earnings Release Date and Conference Call WHITE PLAINS, N.

April 23, 2025 EX-99.1

OPAL Fuels Announces Exchange of High-Voting Stock for Low-Voting Stock by Controlling Stockholder

FOR IMMEDIATE RELEASE OPAL Fuels Announces Exchange of High-Voting Stock for Low-Voting Stock by Controlling Stockholder WHITE PLAINS, N.

April 23, 2025 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 22, 2025 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

March 28, 2025 8-K

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 28, 2025 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

March 28, 2025 EX-10.1

Tax Credit Purchase Agreement, dated March 28, 2025

Exhibit 10.1 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW TAX CREDIT PURCHASE AGREEMENT by and between APOLLO MANAGEMENT HOLDINGS, L.P. and OPAL PARAGON LLC Dated as of March 28, 2025 776104830 -1- TABLE O

March 28, 2025 EX-10.2

Guaranty, dated March 28, 2025

Exhibit 10.2 GUARANTY by OPAL FUELS INC., a Delaware corporation, in favor of APOLLO MANAGEMENT HOLDINGS, L.P., a Delaware limited partnership dated as of March 28, 2025 TABLE OF CONTENTS Page ARTICLE I. DEFINITIONS 1 1.1 Defined Terms 1 1.2 General Definitions 2 1.3 Rules of Interpretation 2 ARTICLE II. GUARANTY 2 2.1 Guaranty 2 2.2 Obligations Absolute and Unconditional 3 ARTICLE III. REPRESENTA

March 17, 2025 EX-21.1

to Exhibit 21.1 to the Annual Report on Form 10-K filed by the Company on March 1

Subsidiaries of OPAL Fuels Inc. Entity Name Jurisdiction of Incorporation or Origination AC Landfill Energy LLC New Jersey Albany Energy LLC Delaware Arbor Hills Energy LLC Delaware Arbor Hills RNG LLC Delaware Atlantic RNG LLC Delaware BC Landfill Energy LLC New Jersey Beacon HoldCo LLC Delaware Beacon Landfill Gas Holdings LLC Delaware Beacon RNG Acquisition LLC Delaware Beacon RNG Investments L

March 17, 2025 EX-19.1

Insider Trading Policy

INSIDER TRADING POLICY THIS POLICY WAS APPROVED BY THE BOARD ON JULY 22, 2022, revised August 17, 2022 1.

March 17, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-40272 OPAL FUELS INC.

March 14, 2025 EX-99.1

OPAL Fuels Reports Fourth Quarter and Full Year 2024 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports Fourth Quarter and Full Year 2024 Results WHITE PLAINS, N.

March 14, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 13, 2025 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

March 5, 2025 EX-10.1

, 2025 by and among OPAL Fuels Intermediate HoldCo LLC, as Borrower, the Guarantors, the Lenders, the LC Issuers, and Bank of America, N.A., as Administrative Agent

Exhibit 10.1 AMENDMENT NO. 1 TO CREDIT AND GUARANTEE AGREEMENT This Amendment No. 1 to Credit and Guarantee Agreement (this “Agreement”) is entered into as of March 3, 2025, to be effective as of March 3, 2025, 2025 (the “Effective Date”) by and among OPAL FUELS INTERMEDIATE HOLDCO LLC, a Delaware limited liability company (the “Borrower”), each entity party hereto as a “Guarantor” (each individua

March 5, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 3, 2025 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1578

February 28, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2025 OPAL Fuels Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2025 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

February 28, 2025 EX-99.1

OPAL Fuels Announces Fourth Quarter and Full Year 2024 Earnings Release Date and Conference Call

OPAL Fuels Announces Fourth Quarter and Full Year 2024 Earnings Release Date and Conference Call WHITE PLAINS, N.

February 7, 2025 EX-99

JOINT FILING AGREEMENT

Invesco Joint Filing Agreement JOINT FILING AGREEMENT In accordance with Rule 13d-1(k) (l) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing of the attached Schedule 13G, and any and all amendments thereto, and expressly authorize Invesco Ltd.

February 3, 2025 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 3, 2025 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1

February 3, 2025 EX-99.1

OPAL Fuels Appoints Kazi Hasan as Chief Financial Officer Proven energy industry executive brings over 25 years of extensive financial, operational, and strategic leadership experience in energy sector to drive disciplined growth and value creation

FOR IMMEDIATE RELEASE OPAL Fuels Appoints Kazi Hasan as Chief Financial Officer Proven energy industry executive brings over 25 years of extensive financial, operational, and strategic leadership experience in energy sector to drive disciplined growth and value creation WHITE PLAINS, N.

November 14, 2024 SC 13G/A

OPAL / OPAL Fuels Inc. / Encompass Capital Advisors LLC Passive Investment

SC 13G/A 1 encompass-opal093024a3.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 3)* Opal Fuels Inc. (Name of Issuer) Class A Common Stock, par value $0.0001 per share (Title of Class of Securities) 68347P103 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Ch

November 12, 2024 SC 13G/A

OPAL / OPAL Fuels Inc. / Zimmer Partners, LP Passive Investment

SC 13G/A 1 formsc13gaopalfuels.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G (Rule 13d-102) (Amendment No. 2) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 OPAL Fuels Inc. (Name of Issuer) Class A Common Stock, par value $0.

November 12, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-40272 OPAL

November 7, 2024 EX-99.1

OPAL Fuels Reports Third Quarter 2024 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports Third Quarter 2024 Results WHITE PLAINS, N.

November 7, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 7, 2024 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1

September 19, 2024 EX-99.1

OPAL Fuels Announces Agreement for $11.1 Million Sale of IRA Investment Tax Credits

Exhibit 99.1 FOR IMMEDIATE RELEASE OPAL Fuels Announces Agreement for $11.1 Million Sale of IRA Investment Tax Credits WHITE PLAINS, N.Y. – (September 18, 2024) – OPAL Fuels Inc. (Nasdaq: OPAL), a vertically integrated leader in the capture and conversion of biogas into low carbon intensity renewable natural gas (“RNG”) and renewable power, today announced the sale of approximately $11.1 million o

September 19, 2024 EX-10.2

Guaranty, dated September 13, 2024 (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed by the Company on September 19, 2024).

Exhibit 10.2 GUARANTY by OPAL FUELS INC., a Delaware corporation, in favor of APOLLO MANAGEMENT HOLDINGS, L.P., a Delaware corporation dated as of September 13, 2024 Exhibit 10.2 TABLE OF CONTENTS Page ARTICLE I. DEFINITIONS 1 1.1Defined Terms 1 1.2General Definitions 2 1.3Rules of Interpretation 2 ARTICLE II. GUARANTY 2 2.1 Guaranty 2 2.2 Obligations Absolute and Unconditional 3 ARTICLE III. REPR

September 19, 2024 8-K

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 13, 2024 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98

September 19, 2024 EX-10.1

Tax Credit Purchase Agreement, dated September 13, 2024 (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on September 19, 2024).

Exhibit 10.1 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW TAX CREDIT PURCHASE AGREEMENT by and between APOLLO MANAGEMENT HOLDINGS, L.P. and OPAL PARAGON LLC Dated as of September 13, 2024 Exhibit 10.1 TABL

August 9, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-40272 OPAL FUELS

August 9, 2024 10-Q/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment 1) (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-

August 8, 2024 EX-99.1

OPAL Fuels Reports Second Quarter 2024 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports Second Quarter 2024 Results WHITE PLAINS, N.

August 8, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2024 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

July 25, 2024 EX-99.1

OPAL Fuels Announces Second Quarter 2024 Earnings Release Date and Conference Call

OPAL Fuels Announces Second Quarter 2024 Earnings Release Date and Conference Call WHITE PLAINS, N.

July 25, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 25, 2024 OPAL Fuels Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 25, 2024 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1578

July 1, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 25, 2024 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1578

June 18, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 18, 2024 OPAL Fuels Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 18, 2024 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1578

May 10, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-40272 OPAL FUEL

May 9, 2024 EX-99.1

OPAL Fuels Reports First Quarter 2024 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports First Quarter 2024 Results WHITE PLAINS, N.

May 9, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 9, 2024 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157835

May 1, 2024 EX-99.1

OPAL Fuels Announces First Quarter 2024 Earnings Release Date and Conference Call

Draft 4-25-24 OPAL Fuels Announces First Quarter 2024 Earnings Release Date and Conference Call WHITE PLAINS, N.

May 1, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 25, 2024 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

April 22, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

April 22, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

March 28, 2024 EX-10.2

Lease and Access Agreement, dated March 27, 2024 (effective as of March 20, 2024)

March 28, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 27, 2024 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

March 28, 2024 EX-10.1

, 2024) (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on March 2

March 15, 2024 SC 13D/A

OPAL / OPAL Fuels Inc. / Comora Mark S - AMENDMENT NO. 1 TO SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* OPAL Fuels Inc. (Name of Issuer) Class A common stock, par value $0.0001 per share (Title of Class of Securities) 68347P 103 (CUSIP Number) Mark Comora c/o OPAL Fuels Inc. One North Lexington Avenue, Suite 1450 White Plains, New York 10601 (914) 705-4000

March 15, 2024 EX-21.1

List of subsidiaries of the registrant.

Subsidiaries of OPAL Fuels Inc. Entity Name Jurisdiction of Incorporation or Origination AC Landfill Energy LLC New Jersey Albany Energy LLC Delaware Arbor Hills Energy LLC Delaware Arbor Hills RNG LLC Delaware Atlantic RNG LLC Delaware BC Landfill Energy LLC New Jersey Beacon HoldCo LLC Delaware Beacon Landfill Gas Holdings LLC Delaware Beacon RNG Acquisition LLC Delaware Beacon RNG Investments L

March 15, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-40272 OPAL FUELS INC.

March 15, 2024 EX-97.1

Clawback Policy

Revision Date – November 2023 OPAL FUELS INC. CLAWBACK POLICY I.Purpose and Scope The Board of Directors (the “Board”) of OPAL Fuels Inc. (the “Company”) believes that it is in the best interests of the Company and its shareholders to create and maintain a culture that emphasizes integrity and accountability and that reinforces the Company’s pay-for-performance compensation philosophy. The Board h

March 13, 2024 EX-99.1

OPAL Fuels Reports Fourth Quarter and Full Year 2023 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports Fourth Quarter and Full Year 2023 Results WHITE PLAINS, N.

March 13, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 13, 2024 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

March 11, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 5, 2024 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1578

March 11, 2024 EX-10.2

First Amendment to Depositary Agreement, dated March 5, 2024, by Paragon RNG LLC, as Borrower, Bank of Montreal, as administrative agent, and Wilmington Trust, National Association, as collateral agent and depositary agent (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed by the Company on March 11, 2024).

Execution Version FIRST AMENDMENT TO DEPOSITARY AGREEMENT This FIRST AMENDMENT TO DEPOSITARY AGREEMENT, dated as of March 5, 2024 (this “Amendment”), is entered into by and among Paragon RNG LLC, a Delaware limited liability company (“Borrower”), Bank of Montreal, Chicago Branch, in its capacity as administrative agent (“Administrative Agent”), Wilmington Trust, National Association, in its capacity as collateral agent for the Secured Parties (“Collateral Agent”) and Wilmington Trust, National Association, in its capacity as depositary agent (“Depositary Agent”, and together with Borrower, Administrative Agent and Collateral Agent, each a “Party”, and collectively, the “Parties”) in connection with that certain Depositary Agreement.

March 11, 2024 EX-10.1

First Amendment to Amended and Restated Credit and Guaranty Agreement, dated March 5, 2024, by and among Paragon RNG LLC, as Borrower, the guarantors, the lenders party thereto, and Bank of Montreal, as administrative agent (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on March 11, 2024).

Execution Version FIRST AMENDMENT TO AMENDED AND RESTATED CREDIT AND GUARANTY AGREEMENT THIS FIRST AMENDMENT TO AMENDED AND RESTATED CREDIT AND GUARANTY AGREEMENT (this “Amendment”), effective as of March 5, 2024 (the “First Amendment Effective Date”), is entered into by and among PARAGON RNG LLC, a Delaware limited liability company (the “Borrower”), the GUARANTORS named on the signature pages he

February 14, 2024 SC 13G/A

KY:OPAL / OPAL FUELS INC / Encompass Capital Advisors LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

February 14, 2024 EX-99.1

AGREEMENT

EX-99.1 2 d660748dex991.htm EX-99.1 EXHIBIT 1 AGREEMENT The persons below hereby agree that the Schedule 13G to which this agreement is attached as an exhibit, as well as all future amendments to such Schedule 13G, shall be filed on behalf of each of them. This agreement is intended to satisfy the requirements of Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934. Date: February 14, 2

February 14, 2024 SC 13G/A

KY:OPAL / OPAL FUELS INC / Electron Capital Partners, LLC - SC 13G/A Passive Investment

SC 13G/A 1 d660748dsc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1) OPAL Fuels Inc. (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 68347P103 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) C

February 13, 2024 SC 13G/A

KY:OPAL / OPAL FUELS INC / Zimmer Partners, LP Passive Investment

SC 13G/A 1 formsc13ga-opal.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G (Rule 13d-102) (Amendment No. 1) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 OPAL Fuels Inc. (Name of Issuer) Class A Common Stock, par value $0.0001

February 13, 2024 SC 13G

KY:OPAL / OPAL FUELS INC / VANGUARD GROUP INC - SCHEDULE 13G Passive Investment

SC 13G 1 tv01616-opalfuelsincclassa.htm SCHEDULE 13G SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: OPAL Fuels Inc. Class A Title of Class of Securities: Common Stock CUSIP Number: 68347P103 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursua

January 5, 2024 SC 13D/A

KY:OPAL / OPAL FUELS INC / NEXTERA ENERGY INC Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* OPAL Fuels Inc. (Name of Issuer) Class A Common Stock, par value $0.0001 per share (Title of Class of Securities) 68347P103 (CUSIP Number) Charles E. Sieving, Esq. Executive Vice President & General Counsel NextEra Energy, Inc. 700 Universe Boulevard Jun

December 19, 2023 SC 13D/A

KY:OPAL / OPAL FUELS INC / ArcLight CTC Holdings II, L.P. - AMENDMENT NO. 4 TO SCHEDULE 13D Activist Investment

SC 13D/A 1 ea190338-13da4arclight2opal.htm AMENDMENT NO. 4 TO SCHEDULE 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 4)* OPAL FUELS INC. (Name of Issuer) Class A common stock, par value $0.0001 per share (Title of Class of Securities) 68347P 103 (CUSIP Number) Christine M. Miller c/o ArcLight CTC Ho

November 22, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 22, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

November 17, 2023 EX-10.1

At Market Issuance Sales Agreement, dated November 17, 2023, among OPAL Fuels Inc., B. Riley Securities, Inc., Cantor Fitzgerald & Co. and Stifel, Nicolaus & Company, Incorporated (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on November 17, 2023).

Execution Version OPAL FUELS INC. Class A Common Stock (par value $0.0001 per share) At Market Issuance Sales Agreement November 17, 2023 B. Riley Securities, Inc. 299 Park Avenue, 21st Floor New York, NY 10171 Cantor Fitzgerald & Co. 110 East 59th Street New York, NY 10022 Stifel, Nicolaus & Company, Incorporated 787 7th Avenue 11th Floor New York, NY 10019 Ladies and Gentlemen: Opal Fuels Inc.,

November 17, 2023 424B3

Up to $75,000,000 OPAL FUELS INC. Class A Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273584 PROSPECTUS SUPPLEMENT (To Prospectus dated September 6, 2023) Up to $75,000,000 OPAL FUELS INC. Class A Common Stock We have entered into an At Market Issuance Sales Agreement, dated November 17, 2023, (the “Sales Agreement”), with B. Riley Securities, Inc. (“B. Riley Securities”), Cantor Fitzgerald & Co. (“Cantor”) and Stifel, Nicolaus

November 17, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 17, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

November 15, 2023 8-K/A

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 13, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commiss

November 15, 2023 EX-99.1

OPAL Fuels Reports Third Quarter 2023 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports Third Quarter 2023 Results WHITE PLAINS, N.

November 14, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-40272 OPAL

November 14, 2023 EX-10.12

Base Contract for Sale and Purchase of Natural Gas (San Diego), dated September 15, 2023 (incorporated by reference to Exhibit 10.12 to the Quarterly Report on Form 10-Q filed by the Company on November 14, 2023).

Exhibit 10.12 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW Base Contract for Sale and Purchase of Natural Gas This Base Contract is entered into as of the following date: September 15, 2023. The parties to

November 14, 2023 EX-10.13

Base Contract for Sale and Purchase of Natural Gas (Richmond), dated September 15, 2023 (incorporated by reference to Exhibit 10.13 to the Quarterly Report on Form 10-Q filed by the Company on November 14, 2023).

Exhibit 10.13 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW Base Contract for Sale and Purchase of Natural Gas This Base Contract is entered into as of the following date: September 15, 2023. The parties to

November 13, 2023 EX-99.1

OPAL Fuels Reports Third Quarter 2023 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports Third Quarter 2023 Results WHITE PLAINS, N.

November 13, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 13, 2023 OPAL Fuels Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 13, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

October 31, 2023 EX-99.1

OPAL Fuels Announces Third Quarter 2023 Earnings Release Date and Conference Call

OPAL Fuels Announces Third Quarter 2023 Earnings Release Date and Conference Call WHITE PLAINS, N.

October 31, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 30, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1

October 26, 2023 EX-10.1

Asset Purchase and Sale Agreement, dated October 20, 2023, with Washington Gas Light Company (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on October 26, 2023).

Exhibit 10.1 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW Execution Version ASSET PURCHASE AND SALE AGREEMENT by and between PRINCE WILLIAM RNG LLC and WASHINGTON GAS LIGHT COMPANY Dated as of October , 20

October 26, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 20, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1

October 20, 2023 EX-10.1

Separation Agreement and General Release dated October 19, 2023 between the Company and Ann Anthony (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K/A filed by the Company on October 20, 2023).

Exhibit 10.1 CONFIDENTIAL SEPARATION AGREEMENT AND GENERAL RELEASE This Confidential Separation Agreement and General Release (“Agreement”) is made by and between Ann Anthony (“Employee”) and OPAL Fuels Inc., a Delaware corporation (the “Company”). Employee and Company are herein after referred to as the “Parties,” and each a “Party.” WHEREAS, Employee has been employed by Company; WHEREAS, on Oct

October 20, 2023 8-K/A

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 5, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware 001-40272 98-1578357 (State or other jurisdiction of incorporation)

October 13, 2023 CORRESP

2

Sheppard, Mullin, Richter & Hampton LLP 30 Rockefeller Plaza New York, New York 10112-0015 212.

October 12, 2023 EX-10.1

by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on October 12, 2023).

Execution Version OPAL FUELS LLC Interim Services Agreement This Interim Services Agreement (“Agreement”) is made as of October 12, 2023 (the “Effective Date”) by and between OPAL Fuels LLC, a Delaware limited liability company (the “Company”) and Fortistar Services 2 LLC, a Delaware limited liability company (the “Service Provider”).

October 12, 2023 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 5, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-15

October 12, 2023 EX-99.1

OPAL Fuels Appoints Scott Contino Interim Chief Financial Officer

FOR IMMEDIATE RELEASE OPAL Fuels Appoints Scott Contino Interim Chief Financial Officer WHITE PLAINS, N.

October 4, 2023 CORRESP

Sheppard, Mullin, Richter & Hampton LLP

Sheppard, Mullin, Richter & Hampton LLP 30 Rockefeller Plaza New York, New York 10112-0015 212.

September 20, 2023 EX-10.1

Agreement, dated September 14, 2023, by and among OPAL L2G and SJI (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on September 20, 2023).

Execution Version LIMITED LIABILITY COMPANY AGREEMENT OF LAND2GAS LLC THIS LIMITED LIABILITY COMPANY AGREEMENT (this “Agreement”) of Land2Gas LLC, a Delaware limited liability company (the “Company”), dated as of the 14th day of September, 2023 (the “Effective Date”), is by and between OPAL Land2Gas LLC, a Delaware limited liability company (“OPAL”), and SJI Landfill RNG LLC, a Delaware limited liability company (“SJI”), each as a Member of the Company.

September 20, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 14, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98

September 5, 2023 EX-10.1

Credit Agreement, dated September 1, 2023, by and among Intermediate HoldCo as Borrower, the guarantors, the lenders party thereto, Bank of America, N.A. as the administration agent, and Apterra Infrastructure Capital LLC, Barclays Bank PLC, BofA Securities, Inc., Celtic Bank Corporation, JP Morgan Chase Bank, N.A. and Investec Inc., as joint lead arrangers (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on September 5, 2023).

Exhibit 10.1 Deal CUSIP: 68347UAA0 Term Loan CUSIP: 68347UAB8 Revolving Loan CUSIP: 68347UAC6 CREDIT AND GUARANTEE AGREEMENT Dated as of September 1, 2023 among OPAL FUELS INTERMEDIATE HOLDCO LLC, as Borrower THE GUARANTORS PARTY HERETO FROM TIME TO TIME BANK OF AMERICA, N.A., as Administrative Agent APTERRA INFRASTRUCTURE CAPITAL LLC, BARCLAYS BANK PLC, BofA SECURITIES, INC., CELTIC BANK CORPORAT

September 5, 2023 EX-10.2

Pledge Agreement, dated September 1, 2023, by OPAL Fuels Parent HoldCo 3 LLC in favor of Bank of America, N.A. (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed by the Company on September 5, 2023).

Exhibit 10.2 Execution Version PLEDGE AGREEMENT dated as of September 1, 2023 of OPAL FUELS PARENT HOLDCO 3 LLC in favor of BANK OF AMERICA, N.A., as Collateral Agent ||||||||||| TABLE OF CONTENTS Page ARTICLE I Definitions and References 1 Section 1.1. Definitions in Credit Agreement 1 Section 1.2. Definitions in the UCC, etc 1 Section 1.3. Definitions in this Agreement 2 Section 1.4. Rules of Co

September 5, 2023 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 1, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

September 5, 2023 EX-10.4

Note (Term), dated September 1, 2023, between OPAL Fuels Intermediate HoldCo LLC and BankUnited, N.A. (incorporated by reference to Exhibit 10.4 to the Current Report on Form 8-K filed by the Company on September 5, 2023).

Exhibit 10.4 NOTE $32,500,000 New York, New York No. 1 FOR VALUE RECEIVED, the undersigned, OPAL FUELS INTERMEDIATE HOLDCO LLC, a Delaware limited liability company (“Borrower”), hereby promises to pay to BANKUNITED, N.A. (“Lender”), the principal sum of THIRTY-TWO MILLION FIVE HUNDRED THOUSAND DOLLARS ($32,500,000), or, if less, the aggregate unpaid principal amount of the Term Loans made by Lend

September 5, 2023 EX-10.3

Security Agreement, dated September 1, 2023, by OPAL Fuels Intermediate HoldCo LLC and the other grantors listed on the signature pages thereto in favor of Bank of America, N.A. (incorporated by reference to Exhibit 10.3 to the Current Report on Form 8-K filed by the Company on September 5, 2023).

Exhibit 10.3 Execution Version SECURITY AGREEMENT dated as of September 1, 2023 of OPAL FUELS INTERMEDIATE HOLDCO LLC and each other Grantor listed on the signature pages hereof in favor of BANK OF AMERICA, N.A. as Collateral Agent ||||||||||| TABLE OF CONTENTS Page ARTICLE I Definitions and References 1 Section 1.1. Definitions in Credit Agreement 1 Section 1.2. Definitions in the UCC, etc 1 Sect

September 5, 2023 EX-10.5

Note (Revolving), dated September 1, 2023, between OPAL Fuels Intermediate HoldCo LLC and BankUnited, N.A. (incorporated by reference to Exhibit 10.5 to the Current Report on Form 8-K filed by the Company on September 5, 2023).

Exhibit 10.5 NOTE $2,500,000 New York, New York No. 2 FOR VALUE RECEIVED, the undersigned, OPAL FUELS INTERMEDIATE HOLDCO LLC, a Delaware limited liability company (“Borrower”), hereby promises to pay to BANKUNITED, N.A. (“Lender”), the principal sum of TWO MILLION FIVE HUNDRED THOUSAND DOLLARS ($2,500,000), or, if less, the aggregate unpaid principal amount of the Revolving Loans made by Lender t

September 5, 2023 EX-99.1

OPAL Fuels Announces New $500 Million Credit Facility

OPAL Fuels Announces New $500 Million Credit Facility WHITE PLAINS, N.Y. – (September 5, 2023) – OPAL Fuels Inc. (Nasdaq: OPAL), a vertically integrated producer and distributor of renewable natural gas (RNG) and renewable electricity, announced today the closing of a new $500 million senior secured credit facility (the “Credit Facility”). The Credit Facility consolidates certain existing indebted

September 1, 2023 CORRESP

OPAL Fuels Inc. One North Lexington Avenue, Suite 1450 White Plains, New York 10601 (914) 705-4000

OPAL Fuels Inc. One North Lexington Avenue, Suite 1450 White Plains, New York 10601 (914) 705-4000 September 1, 2023 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Energy & Transportation 100 F Street, N.E. Washington, D.C. 20549 Attention: Claudia Rodriguez Re: OPAL Fuels Inc. Registration Statement on Form S-3 File No. 333-273584 Ladies and G

August 31, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 28, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-15

August 31, 2023 EX-10.3

Landfill Gas Purchase and Sale Agreement, dated August 28, 2023 with Guadalupe Rubbish Disposal Co., Inc. (incorporated by reference to Exhibit 10.3 to the Current Report on Form 8-K filed by the Company on August 31, 2023).

Exhibit 10.3 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW LANDFILL GAS PURCHASE AND SALE AGREEMENT Between GUADALUPE RUBBISH DISPOSAL CO., INC. And GUADALUPE RENEWABLE ENERGY LLC Dated as of August 28 , 20

August 31, 2023 EX-10.4

Lease Agreement, dated August 28, 2023 with Guadalupe Rubbish Disposal Co., Inc. (incorporated by reference to Exhibit 10.4 to the Current Report on Form 8-K filed by the Company on August 31, 2023).

Exhibit 10.4 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW LEASE AGREEMENT THIS LEASE AGREEMENT (this “Agreement”) made as of this 28th day of August , 2023 (the “Effective Date”) by and between Guadalupe R

August 31, 2023 EX-10.2

Lease Agreement, dated August 28, 2023 with Waste Management of California, Inc. (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed by the Company on August 31, 2023).

Exhibit 10.2 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW LEASE AGREEMENT THIS LEASE AGREEMENT (this “Agreement”) made as of this 28th day of August , 2023 (the “Effective Date”) by and between Waste Manag

August 31, 2023 EX-10.1

Landfill Gas Purchase and Sale Agreement, dated August 28, 2023 with Waste Management of California, Inc. (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on August 31, 2023).

Exhibit 10.1 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW LANDFILL GAS PURCHASE AND SALE AGREEMENT Between WASTE MANAGEMENT OF CALIFORNIA, INC. And KIRBY CANYON RNG, LLC Dated as of August 28 , 2023 LANDFI

August 14, 2023 EX-10.5

Third Amended and Restated Gas Sale and Purchase Agreement, dated August 11, 2023 (incorporated by reference to Exhibit 10.5 to the Quarterly Report on Form 10-Q filed by the Company on August 14, 2023).

Exhibit 10.5 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW Execution Version THIRD AMENDED AND RESTATED GAS SALE AND PURCHASE AGREEMENT [***] and Fall River Renewable Power LLC 1 THIRD AMENDED AND RESTATED

August 14, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-40272 OPAL FUELS

August 11, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-3/A (Form Type) OPAL FUELS INC.

August 11, 2023 S-3/A

As filed with the Securities and Exchange Commission on August 11, 2023

As filed with the Securities and Exchange Commission on August 11, 2023 Registration No.

August 11, 2023 424B3

OPAL FUELS INC. UP TO 163,676,735 SHARES OF CLASS A COMMON STOCK

Filed pursuant to Rule 424(b)(3) Registration No. 333-266757 PROSPECTUS OPAL FUELS INC. UP TO 163,676,735 SHARES OF CLASS A COMMON STOCK This prospectus relates to the offer and sale from time to time by the selling securityholders named in this prospectus (the “Selling Holders”) of: (i) 8,202,865 shares of Class A common stock issued under the Business Combination Agreement, dated as of December

August 9, 2023 EX-99.1

OPAL Fuels Reports Second Quarter 2023 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports Second Quarter 2023 Results WHITE PLAINS, N.

August 9, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 9, 2023 OPAL Fuels Inc. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 9, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

August 2, 2023 POS AM

As filed with the Securities and Exchange Commission on August 1, 2023

As filed with the Securities and Exchange Commission on August 1, 2023 Registration No.

August 1, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-3 (Form Type) OPAL FUELS INC. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Share(1) Maximum Aggregate Offering Price(2) Fee Rate Amount of Registration Fee(3) Fees to Be Paid Equity Other

August 1, 2023 S-3

As filed with the Securities and Exchange Commission on August 1, 2023

As filed with the Securities and Exchange Commission on August 1, 2023 Registration No.

July 20, 2023 EX-99.1

OPAL Fuels Announces Second Quarter 2023 Earnings Release Date and Conference Call

Exhibit 99.1 OPAL Fuels Announces Second Quarter 2023 Earnings Release Date and Conference Call WHITE PLAINS, N.Y. – (July 19, 2023) – OPAL Fuels Inc. (Nasdaq: OPAL), a vertically integrated producer and distributor of renewable natural gas (RNG) and renewable electricity, announced that it will release its earnings results for the second quarter ended June 30, 2023, after market close on Wednesda

July 20, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 19, 2023 OPAL Fuels Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 19, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1578

June 29, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 26, 2023 OPAL Fuels Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 26, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1578

June 23, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 23, 2023 OPAL Fuels Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 23, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1578

June 2, 2023 EX-10.1

Amended and Restated Credit and Guaranty Agreement, dated May 30, 2023, among Paragon RNG LLC as Borrower, the Guarantors, the lenders thereto, Bank of Montreal as the administrative agent, Wilmington Trust as collateral agent and BMO Capital Markets Corp., Investec Inc. and Comerica Bank as joint lead arrangers (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on June 2, 2023).

Exhibit 10.1 AMENDED AND RESTATED CREDIT AND GUARANTY AGREEMENT dated as of May 30, 2023 among PARAGON RNG LLC, as Borrower, The Guarantors Party Hereto, as Guarantors, BANK OF MONTREAL, CHICAGO BRANCH, INVESTEC BANK PLC and COMERICA BANK, as Lenders, The LC Issuers and Other Lenders From Time to Time Party Hereto, BANK OF MONTREAL, CHICAGO BRANCH, as Administrative Agent, WILMINGTON TRUST, NATION

June 2, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 30, 2023 OPAL Fuels Inc. (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 30, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-15783

May 15, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-40272 OPAL FUEL

May 15, 2023 424B3

OPAL FUELS INC.

Prospectus Supplement No. 1 Filed pursuant to Rule 424(b)(3) (To Prospectus dated May 15, 2023) Registration Statement No. 333-266757 OPAL FUELS INC. This prospectus supplement updates, amends and supplements the prospectus dated May 15, 2023 (the “Prospectus”), which forms a part of our Registration Statement on Form S-1 (Registration No. 333-266757). Capitalized terms used in this prospectus sup

May 15, 2023 EX-10.2

Landfill Gas Purchase and Sale Agreement dated April 13, 2023 (effective as of March 13, 2023)

Exhibit 10.2 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW LANDFILL GAS PURCHASE AND SALE AGREEMENT Between WASTE MANAGEMENT OF ILLINOIS, INC. And COTTONWOOD RNG LLC Dated as of March 13, 2023 -1- LANDFILL

May 15, 2023 424B3

PROSPECTUS OPAL FUELS INC. UP TO 166,318,246 SHARES OF CLASS A COMMON STOCK

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-266757 PROSPECTUS OPAL FUELS INC. UP TO 166,318,246 SHARES OF CLASS A COMMON STOCK This prospectus relates to the offer and sale from time to time by the selling securityholders named in this prospectus (the “Selling Holders”) of: (i) 10,838,609 shares of Class A common stock issued under the Business Combination Agreement, dated as o

May 15, 2023 EX-10.3

Piggyback Agreement for Landfill Gas Purchase Agreement dated May 2, 2023 (incorporated by reference to Exhibit 10.3 to the Quarterly Report on Form 10-Q filed by the Company on May 15, 2023).

Exhibit 10.3 PORTIONS OF INFORMATION CONTAINED IN THIS AGREEMENT HAVE BEEN EXCLUDED FROM THIS AGREEMENT BECAUSE THEY ARE BOTH NOT MATERIAL AND THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL. EXCLUDED INFORMATION IS MARKED AS [***] BELOW PIGGYBACK AGREEMENT FOR LANDFILL GAS PURCHASES THIS PIGGYBACK AGREEMENT (the “Agreement”), dated May 2, 2023 (the “Execution Date”), is entered int

May 11, 2023 EX-99.1

OPAL Fuels Reports First Quarter 2023 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports First Quarter 2023 Results WHITE PLAINS, N.

May 11, 2023 EX-99.1

OPAL Fuels Reports First Quarter 2023 Results

FOR IMMEDIATE RELEASE OPAL Fuels Reports First Quarter 2023 Results WHITE PLAINS, N.

May 11, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 10, 2023 OPAL Fuels Inc. (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 10, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-15783

May 11, 2023 8-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 10, 2023

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 10, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission F

May 9, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

May 8, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2023 OPAL Fuels Inc. (Exac

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157835

May 4, 2023 POS AM

As filed with the Securities and Exchange Commission on May 4, 2023

As filed with the Securities and Exchange Commission on May 4, 2023 Registration No.

May 3, 2023 POS AM

As filed with the Securities and Exchange Commission on May 3, 2023

As filed with the Securities and Exchange Commission on May 3, 2023 Registration No.

May 1, 2023 SC 13D/A

KY:OPAL / OPAL FUELS INC / ArcLight CTC Holdings II, L.P. - AMENDMENT NO. 3 TO SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 3)* OPAL FUELS INC. (Name of Issuer) Class A common stock, par value $0.0001 per share (Title of Class of Securities) 68347P 103 (CUSIP Number) Christine M. Miller c/o ArcLight CTC Holdings II, L.P. 200 Clarendon St, 55th Floor Boston, MA 02116 (617) 531-630

May 1, 2023 EX-99.1

OPAL Fuels Announces First Quarter Earnings Release Date and Conference Call

OPAL Fuels Announces First Quarter Earnings Release Date and Conference Call WHITE PLAINS, N.

May 1, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 28, 2023 OPAL Fuels Inc. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 28, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

April 19, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 13, 2023 OPAL Fuels Inc. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 13, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

April 11, 2023 SC 13G/A

KY:OPAL / OPAL FUELS INC / Meteora Capital, LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

April 5, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 30, 2023 OPAL Fuels Inc. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 30, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

April 5, 2023 EX-10.1

Securities Purchase Agreement, dated March 30, 2023, by and between OPAL Fuels Inc. and purchasers named therein (incorporated by reference to Exhibit 10.1 to the registrant's Current Report on Form 8-K filed with the SEC on April 5, 2023).

SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of March 30, 2023, by and among OPAL Fuels Inc.

March 29, 2023 EX-4.6

Form of Performance Restricted Stock Unit Award Grant Notice and Award Agreement (incorporated by reference to the Annual Report on Form 10-K filed on March 28, 2023).

OPAL FUELS INC. PERFORMANCE RESTRICTED STOCK UNIT AWARD GRANT NOTICE (2022 Omnibus Equity Incentive Plan) As a key leader in our business, you are in a position to have significant influence on the performance and success of OPAL Fuels Inc. (the “Company”). I am pleased to inform you that, in recognition of the role you play in our collective success, you have been granted a Performance Restricted

March 29, 2023 EX-4.5

Form of Stock Option Grant Notice and Option Agreement (incorporated by reference to the Annual Report on Form 10-K filed on March 28, 2023).

OPAL FUELS INC. STOCK OPTION GRANT NOTICE AND OPTION AGREEMENT (2022 Omnibus Equity Incentive Plan) As a key leader in our business, you are in a position to have significant influence on the performance and success of OPAL Fuels Inc. (the “Company”). I am pleased to inform you that, in recognition of the role you play in our collective success, you have been granted an option to purchase shares o

March 29, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-40272 OPAL FUELS INC.

March 29, 2023 EX-4.4

OPAL Fuels Inc. Short-Term Incentive Plan (incorporated by reference to Exhibit 4.4 to the Annual Report on Form 10-K filed on March 29, 2023).

OPAL FUELS INC. SHORT-TERM INCENTIVE PLAN ARTICLE 1PLAN OBJECTIVES Section 1.1Purpose. The purpose of the Plan is to achieve the following objectives: (i) recognize outstanding performers who have contributed significantly to the Company’s success and to the success of such performers’ respective business units, (ii) align corporate goals and strategy to executive compensation strategy, and (iii)

March 27, 2023 EX-99.1

OPAL Fuels Reports Revenue of $235.5 million and 2.2 million MMBtu of RNG Produced in 2022, Representing 42% and 38% Annual Increases

FOR IMMEDIATE RELEASE OPAL Fuels Reports Revenue of $235.5 million and 2.2 million MMBtu of RNG Produced in 2022, Representing 42% and 38% Annual Increases WHITE PLAINS, N.Y. – (March 27, 2023) – OPAL Fuels Inc. (“OPAL Fuels” or the “Company”) (Nasdaq: OPAL), a leading vertically integrated producer and distributor of renewable natural gas (RNG), today announced financial and operating results for

March 27, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 27, 2023 OPAL Fuels Inc. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 27, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-157

March 7, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 7, 2023 OPAL Fuels Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 7, 2023 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1578

March 7, 2023 EX-99.1

OPAL Fuels Announces Fourth Quarter and Full Year 2022 Earnings Release Date and Conference Call

OPAL Fuels Announces Fourth Quarter and Full Year 2022 Earnings Release Date and Conference Call WHITE PLAINS, N.

February 21, 2023 SC 13G

KY:OPAL / OPAL FUELS INC / Electron Capital Partners, LLC - SC 13G Passive Investment

SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* OPAL Fuels Inc. (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 68347P103 (CUSIP Number) July 22, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate

February 21, 2023 EX-99.1

AGREEMENT

EX-99.1 EXHIBIT 1 AGREEMENT The persons below hereby agree that the Schedule 13G to which this agreement is attached as an exhibit, as well as all future amendments to such Schedule 13G, shall be filed on behalf of each of them. This agreement is intended to satisfy the requirements of Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934. Date: February 21, 2023 ELECTRON CAPITAL PARTNER

February 16, 2023 EX-99.1

Joint Filing Agreement

EX-99.1 2 opalex9901.htm JOINT FILING AGREEMENT Exhibit 99.1 JOINT FILING AGREEMENT Pursuant to and in accordance with the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder (the “Exchange Act”) the undersigned hereby agree to the joint filing on behalf of each of them of any filing required by such party under Section 13 of the Exchange Act or any rule or regula

February 16, 2023 SC 13G

US68347P1030 / OPAL Fuels, Inc. / Meteora Capital, LLC - SC 13G Passive Investment

SC 13G 1 opal13g.htm SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* OPAL Fuels Inc. (Name of Issuer) Class A Common stock, par value $0.0001 (Title of Class of Securities) 68347P103 (CUSIP Number) December 31, 2022 (Date of Event which Requires Filing of this Statement) Check the appropriate bo

February 14, 2023 SC 13G/A

US68347P1030 / OPAL Fuels, Inc. / Encompass Capital Advisors LLC Passive Investment

SC 13G/A 1 encompass-opal123122a1.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Opal Fuels Inc. (Name of Issuer) Class A Common Stock, par value $0.0001 per share (Title of Class of Securities) 68347P103 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Che

February 14, 2023 SC 13G/A

US68347P1030 / OPAL Fuels, Inc. / CITADEL ADVISORS LLC - SC 13G/A Passive Investment

SC 13G/A 1 tm233474-17sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 1)* OPAL FUELS INC. (Name of Issuer) Class A Common Stock, par value $0.0001 per share (the “Shares”)

February 14, 2023 SC 13G/A

US68347P1030 / OPAL Fuels, Inc. / Beryl Capital Management LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* OPAL Fuels Inc. (Name of Issuer) Class A Common Stock, par value $0.0001 (Title of Class of Securities) 68347P103 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pur

February 9, 2023 SC 13G

US68347P1030 / OPAL Fuels, Inc. / Zimmer Partners, LP Passive Investment

SC 13G 1 formsc13g-opal.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G (Rule 13d-102) (Amendment No. ) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 OPAL Fuels Inc. (Name of Issuer) Class A Common Stock, par value $0.0001 per

February 9, 2023 SC 13G/A

US68347P1030 / OPAL Fuels, Inc. / ADAGE CAPITAL PARTNERS GP, L.L.C. - OPAL FUELS, INC. Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* OPAL Fuels Inc. (f/k/a ArcLight Clean Transition Corp. II) (Name of Issuer) Class A Common Stock, par value $0.0001 per share (Title of Class of Securities) 68347P103 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of This Statement) Check the

February 1, 2023 SC 13D/A

US68347P1030 / OPAL Fuels, Inc. / ArcLight CTC Holdings II, L.P. - AMENDMENT NO. 2 TO SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 2)* OPAL FUELS INC. (Name of Issuer) Class A common stock, par value $0.0001 per share (Title of Class of Securities) 68347P 103 (CUSIP Number) Christine M. Miller c/o ArcLight CTC Holdings II, L.P. 200 Clarendon St, 55th Floor Boston, MA 02116 (617) 531-630

December 23, 2022 SC 13D/A

US68347P1030 / OPAL Fuels, Inc. / ArcLight CTC Holdings II, L.P. - AMENDMENT NO. 1 TO SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* OPAL FUELS INC. (Name of Issuer) Class A common stock, par value $0.0001 per share (Title of Class of Securities) 68347P 103 (CUSIP Number) Christine M. Miller c/o ArcLight CTC Holdings II, L.P. 200 Clarendon St, 55th Floor Boston, MA 02116 (617) 531-630

December 22, 2022 EX-99.1

OPAL Fuels Inc. Announces Successful Completion of Exchange Offer and Consent Solicitation Relating to Warrants

FOR IMMEDIATE RELEASE OPAL Fuels Inc. Announces Successful Completion of Exchange Offer and Consent Solicitation Relating to Warrants WHITE PLAINS, N.Y. ? (December 22, 2022) ? OPAL Fuels Inc. (?OPAL Fuels? or the ?Company?) (Nasdaq: OPAL), a leading vertically integrated producer and distributor of renewable natural gas, today announced the completion of its previously disclosed exchange offer (t

December 22, 2022 424B3

OPAL FUELS INC.

Prospectus Supplement No. 6 Filed pursuant to Rule 424(b)(3) (To Prospectus dated November 8, 2022) Registration Statement No. 333-266757 OPAL FUELS INC. This prospectus supplement updates, amends and supplements the prospectus dated November 8, 2022 (the ?Prospectus?), which forms a part of our Registration Statement on Form S-1 (Registration No. 333-266757). Capitalized terms used in this prospe

December 22, 2022 424B3

OPAL FUELS INC.

Prospectus Supplement No. 5 Filed pursuant to Rule 424(b)(3) (To Prospectus dated November 8, 2022) Registration Statement No. 333-266757 OPAL FUELS INC. This prospectus supplement updates, amends and supplements the prospectus dated November 8, 2022 (the ?Prospectus?), which forms a part of our Registration Statement on Form S-1 (Registration No. 333-266757). Capitalized terms used in this prospe

December 22, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 22, 2022 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

December 21, 2022 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 15, 2022 OPAL Fuels Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 15, 2022 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

December 21, 2022 EX-10.1

Service Contract Agreement , dated December 15, 2022, by and between OPAL Fuels Inc. and United Parcel Service Oasis Supply Corporation

[*] Certain information in this document has been omitted from this exhibit because it is both (i) not material and (ii) would be competitively harmful if publicly disclosed.

December 21, 2022 EX-10.2

FM3 Credit Agreement, dated December 19, 2022, by and between Fortistar Methane LLC, OPAL Fuels LLC and a syndicate of lenders led by MUFG Union Bank N.A. as administrative agent (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed by the Company on December 21, 2022).

Execution Version OMNIBUS AMENDMENT AND CONSENT AGREEMENT This OMNIBUS AMENDMENT AND CONSENT AGREEMENT, dated as of December 19, 2022 (this “Amendment”), is entered into by and among FORTISTAR METHANE 3 LLC, a Delaware limited liability company (the “Borrower”), each of the Lenders party hereto (the “Lenders”), MUFG BANK, LTD.

December 20, 2022 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 16, 2022 OPAL Fuels Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 16, 2022 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

December 20, 2022 EX-10.1

Amendment No. 1 to Warrant Agreement, dated December 19, 2022, by and between OPAL Fuels Inc. and Continental Stock Transfer & Trust Company

Execution Version AMENDMENT NO. 1 TO WARRANT AGREEMENT This amendment (this ?Amendment?) is made as of December 19, 2022, by and between OPAL Fuels Inc., a Delaware corporation (the ?Company?), and Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (the ?Warrant Agent?), and constitutes an amendment to that certain Warrant Agreement, dated as of March 25, 2021 (th

December 20, 2022 SC TO-I/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 1) OPAL FUELS INC. (Name of Subject Company and Filing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 1) OPAL FUELS INC. (Name of Subject Company and Filing Person (Issuer)) Warrants to Acquire Shares of Class A Common Stock 68347P 111 (Title of Class of Securities) (CUSIP Number of Class of Securities) A

December 20, 2022 EX-99.1

OPAL Fuels Inc. Announces Successful Warrant Exchange Offer

FOR IMMEDIATE RELEASE OPAL Fuels Inc. Announces Successful Warrant Exchange Offer WHITE PLAINS, N.Y. ? (December 19, 2022) ? OPAL Fuels Inc. (?OPAL Fuels? or the ?Company?) (Nasdaq: OPAL), a leading vertically integrated producer and distributor of renewable natural gas, today announced the expiration and results of its previously disclosed exchange offer (the ?Offer?) and consent solicitation (th

December 19, 2022 8-K

Entry into a Material Definitive Agreement, Material Modification to Rights of Security Holders, Financial Statements and Exhibits, Other Events, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 16, 2022 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

December 19, 2022 EX-99.1

OPAL Fuels Inc. Announces Successful Warrant Exchange Offer

FOR IMMEDIATE RELEASE OPAL Fuels Inc. Announces Successful Warrant Exchange Offer WHITE PLAINS, N.Y. ? (December 19, 2022) ? OPAL Fuels Inc. (?OPAL Fuels? or the ?Company?) (Nasdaq: OPAL), a leading vertically integrated producer and distributor of renewable natural gas, today announced the expiration and results of its previously disclosed exchange offer (the ?Offer?) and consent solicitation (th

December 19, 2022 EX-10.1

Amendment No. 1 to Warrant Agreement, dated December 19, 2022, by and between OPAL Fuels Inc. and Continental Stock Transfer & Trust Company

Execution Version AMENDMENT NO. 1 TO WARRANT AGREEMENT This amendment (this ?Amendment?) is made as of December 19, 2022, by and between OPAL Fuels Inc., a Delaware corporation (the ?Company?), and Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (the ?Warrant Agent?), and constitutes an amendment to that certain Warrant Agreement, dated as of March 25, 2021 (th

December 19, 2022 424B3

OPAL FUELS INC.

Prospectus Supplement No. 4 Filed pursuant to Rule 424(b)(3) (To Prospectus dated November 8, 2022) Registration Statement No. 333-266757 OPAL FUELS INC. This prospectus supplement updates, amends and supplements the prospectus dated November 8, 2022 (the ?Prospectus?), which forms a part of our Registration Statement on Form S-1 (Registration No. 333-266757). Capitalized terms used in this prospe

December 15, 2022 424B3

PROSPECTUS/OFFER TO EXCHANGE OPAL FUELS INC. Offer to Exchange Warrants to Acquire Shares of Class A Common Stock of OPAL Fuels Inc. for Shares of Class A Common Stock of OPAL Fuels Inc. and Consent Solicitation

424B3 1 ea170183-424b3opalfuel.htm PROSPECTUS SUPPLEMENT Filed pursuant to Rule 424(b)(3) Registration No. 333-268455 PROSPECTUS/OFFER TO EXCHANGE OPAL FUELS INC. Offer to Exchange Warrants to Acquire Shares of Class A Common Stock of OPAL Fuels Inc. for Shares of Class A Common Stock of OPAL Fuels Inc. and Consent Solicitation THE OFFER PERIOD (AS DEFINED BELOW) AND WITHDRAWAL RIGHTS WILL EXPIRE

November 22, 2022 EX-99.1

Report of Independent Registered Public Accounting Firm

Report of Independent Registered Public Accounting Firm Shareholders and Board of Directors OPAL Fuels Inc.

November 22, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 22, 2022 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

November 22, 2022 424B3

OPAL FUELS INC.

Prospectus Supplement No. 3 Filed pursuant to Rule 424(b)(3) (To Prospectus dated November 8, 2022) Registration Statement No. 333-266757 OPAL FUELS INC. This prospectus supplement updates, amends and supplements the prospectus dated November 8, 2022 (the ?Prospectus?), which forms a part of our Registration Statement on Form S-1 (Registration No. 333-266757). Capitalized terms used in this prospe

November 18, 2022 EX-99.3

Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies, and Other Nominees (incorporated by reference to Exhibit 99.3 to the Company’s Registration Statement on Form S-4, filed with the SEC on November 18, 2022).

Exhibit 99.3 LETTER TO BROKERS, DEALERS, COMMERCIAL BANKS, TRUST COMPANIES, AND OTHER NOMINEES Offer to Exchange Warrants to Acquire Shares of Class A Common Stock of OPAL Fuels Inc. for Shares of Class A Common Stock of OPAL Fuels Inc. and Consent Solicitation THE OFFER AND CONSENT SOLICITATION (EACH AS DEFINED BELOW) AND WITHDRAWAL RIGHTS WILL EXPIRE AT 11:59 P.M., EASTERN TIME, ON DECEMBER 16,

November 18, 2022 SC TO-I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 OPAL FUELS INC. (Name of Subject Company and Filing Person (Issuer))

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 OPAL FUELS INC. (Name of Subject Company and Filing Person (Issuer)) Warrants to Acquire Shares of Class A Common Stock 68347P 111 (Title of Class of Securities) (CUSIP Number of Class of Securities) Ann Anthony Chief F

November 18, 2022 EX-99.1

Form of Letter of Transmittal and Consent (incorporated by reference to Exhibit 99.1 to the Company’s Registration Statement on Form S-4, filed with the SEC on November 18, 2022).

Exhibit 99.1 LETTER OF TRANSMITTAL AND CONSENT Offer to Exchange Warrants to Acquire Shares of Class A Common Stock of OPAL Fuels Inc. for Shares of Class A Common Stock of OPAL Fuels Inc. and Consent Solicitation THE OFFER AND CONSENT SOLICITATION (AS DEFINED BELOW) AND WITHDRAWAL RIGHTS WILL EXPIRE AT 11:59 P.M., EASTERN TIME, ON DECEMBER 16, 2022, OR SUCH LATER TIME AND DATE TO WHICH WE MAY EXT

November 18, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 18, 2022 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

November 18, 2022 EX-10.22

Tender and Support Agreement, dated as of November 18, 2022, by and among OPAL Fuels Inc. and the public warrant holders and private warrant holders party thereto (incorporated by reference to Exhibit 10.22 to the Company’s Registration Statement on Form S-4, filed with the SEC on November 18, 2022).

Exhibit 10.22 TENDER AND SUPPORT AGREEMENT This TENDER AND SUPPORT AGREEMENT (this ?Agreement?), dated as of November 18, 2022, is entered into by and among OPAL Fuels Inc., a Delaware corporation (the ?Company?), each of the persons listed on Schedule A hereto (each, a ?Public Warrant Holder?) and each of the persons listed on Schedule B hereto (each, a ?Private Warrant Holder? and, together with

November 18, 2022 EX-99.2

Form of Notice of Guaranteed Delivery (incorporated by reference to Exhibit 99.2 to the Company’s Registration Statement on Form S-4, filed with the SEC on November 18, 2022).

Exhibit 99.2 NOTICE OF GUARANTEED DELIVERY OF WARRANTS OF OPAL FUELS INC. Pursuant to the Prospectus/Offer to Exchange, dated November 18, 2022 Instructions for Use Unless defined herein, terms used in this notice of guaranteed delivery (this ?Notice of Guaranteed Delivery?) shall have the definitions set forth in the prospectus/offer to exchange, dated November 18, 2022 (as amended or supplemente

November 18, 2022 EX-99.4

Form of Letter to Clients of Brokers, Dealers, Commercial Banks, Trust Companies, and Other Nominees (incorporated by reference to Exhibit 99.4 to the Company’s Registration Statement on Form S-4, filed with the SEC on November 18, 2022).

Exhibit 99.4 LETTER TO CLIENTS OF BROKERS, DEALERS, COMMERCIAL BANKS, TRUST COMPANIES, AND OTHER NOMINEES Offer to Exchange Warrants to Acquire Shares of Class A Common Stock of OPAL Fuels Inc. for Shares of Class A Common Stock of OPAL Fuels Inc. and Consent Solicitation THE OFFER AND CONSENT SOLICITATION (EACH AS DEFINED BELOW) AND WITHDRAWAL RIGHTS WILL EXPIRE AT 11:59 P.M., EASTERN TIME, ON DE

November 18, 2022 EX-10.21

Dealer Manager Agreement, dated as of November 18, 2022, by and between OPAL Fuels Inc. and BofA Securities, Inc., as dealer manager (incorporated by reference to Exhibit 10.21 to the Company’s Registration Statement on Form S-4, filed with the SEC on November 18, 2022).

Exhibit 10.21 Execution Version OPAL Fuels Inc. Dealer Manager and Solicitation Agent Agreement New York, New York November 18, 2022 BofA Securities, Inc., as Dealer Manager c/o BofA Securities, Inc. One Bryant Park New York, New York 10036 Ladies and Gentlemen: OPAL Fuels Inc., a Delaware corporation (the ?Company? or ?we?), plans to make an offer (such offer as described in the Prospectus (as de

November 18, 2022 EX-99.1

OPAL Fuels Inc. Announces Commencement of Exchange Offer and Consent Solicitation Relating to Warrants

FOR IMMEDIATE RELEASE OPAL Fuels Inc. Announces Commencement of Exchange Offer and Consent Solicitation Relating to Warrants WHITE PLAINS, N.Y. ? (November 18, 2022) ? OPAL Fuels Inc. (?OPAL Fuels? or the ?Company?) (Nasdaq: OPAL), a leading vertically integrated producer and distributor of renewable natural gas, today announced that it has commenced an exchange offer (the ?Offer?) and consent sol

November 18, 2022 S-4

As filed with the U.S. Securities and Exchange Commission on November 18, 2022.

As filed with the U.S. Securities and Exchange Commission on November 18, 2022. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 FORM S-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 OPAL FUELS INC. (Exact name of registrant as specified in its charter) Delaware 4932 98-1578357 (State or other jurisdiction of incorporation or organization) (Pr

November 18, 2022 424B3

OPAL FUELS INC.

Prospectus Supplement No. 2 Filed pursuant to Rule 424(b)(3) (To Prospectus dated November 8, 2022) Registration Statement No. 333-266757 OPAL FUELS INC. This prospectus supplement updates, amends and supplements the prospectus dated November 8, 2022 (the ?Prospectus?), which forms a part of our Registration Statement on Form S-1 (Registration No. 333-266757). Capitalized terms used in this prospe

November 18, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table Form S-4 (Form Type) OPAL FUELS INC. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration F

November 18, 2022 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 18, 2022 OPAL Fuels Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 18, 2022 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

November 18, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table SC TO-I (Form Type) OPAL FUELS INC. (Exact Name of Registrant as Specified in its Charter) Table 1: Transaction Valuation Transaction Valuation(1) Fee Rate Amount of Filing Fee(2) Fees to be paid $ 19,540,588 $ 0.00011020 $ 2,154 Fees previously paid ? ? Total Transaction Valuation $ 19,540,588 Total Fees Due for Filing $ 2,154 Total Fee Offsets ? Net Fe

November 18, 2022 EX-99.1

OPAL Fuels Inc. Announces Commencement of Exchange Offer and Consent Solicitation Relating to Warrants

FOR IMMEDIATE RELEASE OPAL Fuels Inc. Announces Commencement of Exchange Offer and Consent Solicitation Relating to Warrants WHITE PLAINS, N.Y. ? (November 18, 2022) ? OPAL Fuels Inc. (?OPAL Fuels? or the ?Company?) (Nasdaq: OPAL), a leading vertically integrated producer and distributor of renewable natural gas, today announced that it has commenced an exchange offer (the ?Offer?) and consent sol

November 16, 2022 8-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2022 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commiss

November 16, 2022 EX-99.1

OPAL Fuels Reports Third Quarter 2022 Results and Full Year 2022 Guidance

FOR IMMEDIATE RELEASE OPAL Fuels Reports Third Quarter 2022 Results and Full Year 2022 Guidance WHITE PLAINS, N.

November 15, 2022 424B3

OPAL FUELS INC.

Prospectus Supplement No. 1 Filed pursuant to Rule 424(b)(3) (To Prospectus dated November 8, 2022) Registration Statement No. 333-266757 OPAL FUELS INC. This prospectus supplement updates, amends and supplements the prospectus dated November 8, 2022 (the ?Prospectus?), which forms a part of our Registration Statement on Form S-1 (Registration No. 333-266757). Capitalized terms used in this prospe

November 14, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-40272 OPAL F

November 14, 2022 EX-99.1

OPAL Fuels Reports Third Quarter 2022 Results and Full Year 2022 Guidance

FOR IMMEDIATE RELEASE OPAL Fuels Reports Third Quarter 2022 Results and Full Year 2022 Guidance WHITE PLAINS, N.

November 14, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2022 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-

November 8, 2022 424B3

Filed Pursuant to Rule 424(b)(3)

Filed Pursuant to Rule 424(b)(3) Registration No. 333-266757 OPAL FUELS INC. UP TO 181,764,740 SHARES OF CLASS A COMMON STOCK This prospectus relates to the issuance by us of up to (i) 9,223,261 shares of Class A common stock, par value $0.0001 per share (the ?Class A common stock?) underlying Private Placement Warrants (as defined in this prospectus) issued by the Company under the Business Combi

November 7, 2022 CORRESP

OPAL Fuels Inc. One North Lexington Avenue, Suite 1450 White Plains, New York 10601 (914) 705-4000

OPAL Fuels Inc. One North Lexington Avenue, Suite 1450 White Plains, New York 10601 (914) 705-4000 November 7, 2022 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Energy & Transportation 100 F Street, N.E. Washington, D.C. 20549 Attention: Kevin Dougherty Laura Nicholson Re: OPAL Fuels Inc. Registration Statement on Form S-1 File No. 333-266757

November 4, 2022 S-1/A

As filed with the Securities and Exchange Commission on November 3, 2022

As filed with the Securities and Exchange Commission on November 3, 2022 Registration No.

November 4, 2022 EX-FILING FEES

Filing Fee Table

EX-FILING FEES 2 ea168046ex-feeopalfuels.htm FILING FEE TABLE Exhibit 107 Calculation of Filing Fee Table Form S-1 (Form Type) OPAL FUELS INC. (Exact Name of Registrant as Specified in its Charter) Newly Registered Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered (1) Proposed Maximum Offering Price Per Security Maximum Aggregate Offering Price F

November 3, 2022 CORRESP

*****

Sheppard, Mullin, Richter & Hampton LLP 30 Rockefeller Plaza New York, New York 10112-0015 212.

November 2, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-1 (Form Type) OPAL FUELS INC. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Car

November 2, 2022 S-1/A

As filed with the Securities and Exchange Commission on November 1, 2022

As filed with the Securities and Exchange Commission on November 1, 2022 Registration No.

November 1, 2022 CORRESP

*****

Sheppard, Mullin, Richter & Hampton LLP 30 Rockefeller Plaza New York, New York 10112-0015 212.

November 1, 2022 EX-99.1

OPAL Fuels Schedules Conference Call to Discuss Third Quarter 2022 Financial Results

OPAL Fuels Schedules Conference Call to Discuss Third Quarter 2022 Financial Results WHITE PLAINS, N.

November 1, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 1, 2022 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98-1

October 14, 2022 CORRESP

-1-

Sheppard, Mullin, Richter & Hampton LLP 30 Rockefeller Plaza New York, New York 10112-0015 212.

October 14, 2022 S-1/A

As filed with the Securities and Exchange Commission on October 14, 2022

As filed with the Securities and Exchange Commission on October 14, 2022 Registration No.

October 3, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) OPAL FUELS INC. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity Class A Common Stock, par value

October 3, 2022 S-8

As filed with the Securities and Exchange Commission on October 3, 2022

As filed with the Securities and Exchange Commission on October 3, 2022 Registration No.

October 3, 2022 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 29, 2022 OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-40272 (Commission File Number) 98

October 3, 2022 EX-10.1

Amendment No. 3 to Delayed Draw Term Loan and Guaranty Agreement, dated September 29, 2022 (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on October 3, 2022).

EXECUTION VERSION 1 1641079513 AMENDMENT NO. 3 TO DELAYED DRAW TERM LOAN AND GUARANTY AGREEMENT This AMENDMENT NO. 3 TO DELAYED DRAW TERM LOAN AND GUARANTY AGREEMENT (this ?Amendment?), dated as of September 29, 2022, is entered into by and among OPAL FUELS INTERMEDIATE HOLDCO LLC, a Delaware limited liability company (the ?Borrower?), certain subsidiaries of the Borrower party hereto as guarantor

September 20, 2022 CORRESP

2

Sheppard, Mullin, Richter & Hampton LLP 30 Rockefeller Plaza New York, New York 10112-0015 212.

September 20, 2022 S-1/A

As filed with the Securities and Exchange Commission on September 20, 2022

As filed with the Securities and Exchange Commission on September 20, 2022 Registration No.

September 20, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-1 (Form Type) OPAL FUELS INC. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered(1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carr

September 19, 2022 EX-10.1

Form of Stock Award Agreement dated September 15, 2022 (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on September 19, 2022).

OPAL FUELS INC. RESTRICTED STOCK UNIT AWARD GRANT NOTICE (2022 Omnibus Equity Incentive Plan) Grantee: [] Date of Grant: Number of Restricted Stock Units: [] Vesting Commencement Date: Vesting: [] Delivery Dates: [] OPAL Fuels Inc., a Delaware corporation By: [] Its: [] Acknowledged and Agreed as of day of , . Name: RESTRICTED STOCK UNIT AWARD AGREEMENT THIS RESTRICTED STOCK UNIT AWARD AGREEMENT (

September 19, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 September 15, 2022 Date of Report (date of earliest event reported) OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-40272 (Commission

August 11, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-1 (Form Type) OPAL FUELS INC. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Car

August 11, 2022 EX-3.1

Restated Certificate of Incorporation of OPAL Fuels Inc.

Exhibit 3.1 CERTIFICATE OF INCORPORATION OF OPAL FUELS INC. 1. Name. The name of the Corporation is OPAL Fuels Inc. (the ?Corporation?). 2. Address; Registered Office and Agent. The address of the Corporation?s registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware 19801 and the name of its registered agent at such address is The Corporatio

August 11, 2022 S-1

As filed with the Securities and Exchange Commission on August 10, 2022

As filed with the Securities and Exchange Commission on August 10, 2022 Registration No.

August 10, 2022 EX-10.6

Promissory Note, dated as of May 16, 2022, by and between Arclight and Sponsor (incorporated by reference to Exhibit 10.6 to the Quarterly Report on Form 10-Q filed by the Company on August 10, 2022).

Exhibit 10.6 THIS PROMISSORY NOTE (?NOTE?) AND THE SECURITIES INTO WHICH THE NOTE MAY BE CONVERTED HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE ?SECURITIES ACT?), OR UNDER THE SECURITIES LAWS OF ANY STATE. THIS NOTE HAS BEEN ACQUIRED FOR INVESTMENT ONLY AND MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF REGISTRATION OF THE RESALE THEREOF UNDER THE SECURITI

August 10, 2022 EX-3.1

Restated Certificate of Incorporation of OPAL Fuels Inc. (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K/A filed by the Company on August 10, 2022).

Exhibit 3.1 CERTIFICATE OF INCORPORATION OF OPAL FUELS INC. 1. Name. The name of the Corporation is OPAL Fuels Inc. (the ?Corporation?). 2. Address; Registered Office and Agent. The address of the Corporation?s registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware 19801 and the name of its registered agent at such address is The Corporatio

August 10, 2022 EX-99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Exhibit 99.2 MANAGEMENT?S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS The following discussion and analysis of the financial condition and results of operations of Opal Fuels LLC, a Delaware limited liability company (?OPAL,? the ?Company,? ?we,? ?us,? and ?our?), should be read together with our unaudited condensed consolidated financial statements as of June 30, 2022

August 10, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ☐ TRANSITION REPORT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period fro m to OPAL FUELS INC. (Exact na

August 10, 2022 EX-99.1

OPAL Fuels Reports Year-to-Date 2022 Results

Exhibit 99.1 FOR IMMEDIATE RELEASE OPAL Fuels Reports Year-to-Date 2022 Results WHITE PLAINS, N.Y. ? (August 10, 2022) ? OPAL Fuels Inc. ("OPAL Fuels," "OPAL" or the "Company") (Nasdaq: OPAL), a vertically integrated producer and distributor of renewable natural gas (RNG), today announced financial and operating results for the six months ended June 30, 2022. Six Months Ended June 30, 2022 ?Total

August 10, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 August 10, 2022 Date of Report (date of earliest event reported) OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-40272 (Commission Fil

August 10, 2022 8-K/A

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 10, 2022 (July 21, 2022) OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware 001-40272 98-1578357 (State or other jurisd

August 10, 2022 EX-99.3

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

Exhibit 99.3 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION Capitalized terms included below but not defined in this Exhibit 99.3 have the same meaning as terms defined and included elsewhere in the Current Report on Form 8-K (the ?Original Report?) filed with the Securities and Exchange Commission (the ?Commission?) on July 27, 2022 (as amended by this Current Report on Form 8-K/A)

August 10, 2022 EX-99.1

OPAL FUELS LLC CONDENSED CONSOLIDATED BALANCE SHEETS (In thousands of U.S. dollars, except per unit data)

Exhibit 99.1 OPAL FUELS LLC CONDENSED CONSOLIDATED BALANCE SHEETS (In thousands of U.S. dollars, except per unit data) June 30, 2022 December 31, 2021 (Unaudited) Assets Current assets: Cash and cash equivalents (includes $23,864 and $1,991 at June 30, 2022 and December 31, 2021, respectively, related to consolidated VIEs) $ 97,091 $ 39,314 Accounts receivable, net (includes $100 and $40 at June 3

August 8, 2022 EX-10.1

Credit Agreement, dated August 4, 2022, made by and among OPAL Intermediate Holdco 2 as Borrower, the guarantors, the lenders thereto, Bank of Montreal as the administration agent, Wilmington Trust as collateral agent and Bank of Montreal, Investec Inc. and Comerica Bank as joint lead arrangers (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Company on August 8, 2022).

Exhibit 10.1 CREDIT AND GUARANTY AGREEMENT dated as of August 4, 2022 among OPAL FUELS INTERMEDIATE HOLDCO 2 LLC, as Borrower, The Guarantors Party Hereto, as Guarantors, BANK OF MONTREAL, CHICAGO BRANCH, INVESTEC BANK PLC and COMERICA BANK, as Lenders, The LC Issuers and Other Lenders From Time to Time Party Hereto, BANK OF MONTREAL, CHICAGO BRANCH, as Administrative Agent, WILMINGTON TRUST, NATI

August 8, 2022 EX-99.1

OPAL Fuels Announces Closing of $105 Million Senior Secured Term Loan

Exhibit 99.1 FOR IMMEDIATE RELEASE OPAL Fuels Announces Closing of $105 Million Senior Secured Term Loan WHITE PLAINS, N.Y. ? (August 8, 2022) ? OPAL Fuels Inc. (Nasdaq: OPAL), a vertically integrated producer and distributor of renewable natural gas (RNG), today announced the closing of a five-year, $105 million senior secured debt facility. The facility provides construction financing for design

August 8, 2022 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 August 8, 2022 (August 4, 2022) Date of Report (date of earliest event reported) OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-40272

August 4, 2022 8-K

Unregistered Sales of Equity Securities

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 August 4, 2022 (July 29, 2022) Date of Report (date of earliest event reported) OPAL Fuels Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 001-40272

August 1, 2022 SC 13D

OPAL / OPAL Fuels Inc - Class A / ArcLight CTC Holdings II, L.P. - SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 OPAL FUELS INC. (Name of Issuer) Class A common stock, par value $0.0001 per share (Title of Class of Securities) 68347P 103 (CUSIP Number) Christine M. Miller c/o ArcLight CTC Holdings II, L.P. 200 Clarendon St, 55th Floor Boston, MA 02116 (617) 531-6300 With a copy to: J

August 1, 2022 SC 13D

OPAL / OPAL Fuels Inc - Class A / NEXTERA ENERGY INC Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* OPAL Fuels Inc. (Name of Issuer) Class A Common Stock, par value $0.0001 per share (Title of Class of Securities) 68347P103 (CUSIP Number) Charles E. Sieving, Esq. Executive Vice President & General Counsel NextEra Energy, Inc. 700 Universe Boulevard Juno

August 1, 2022 SC 13G

OPAL / OPAL Fuels Inc - Class A / ARES MANAGEMENT LLC - SC 13G Passive Investment

Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. )* OPAL Fuels Inc. (Name of Issuer) Class A Common Stock, par value $0.001 per share (Title of Class of Securities) 6

August 1, 2022 EX-4

Joint Filing Agreement, dated as of August 1, 2022.

Exhibit 4 JOINT FILING AGREEMENT Pursuant to Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing of this Statement on Schedule 13D including any amendments thereto.

August 1, 2022 EX-99

Joint Filing Agreement

CUSIP No. 68347P103 Schedule 13G Page 17 of 18 Exhibit 99 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that they are jointly filing this statement on Schedule 13G. Each of them is responsible for the timely filing of such statement and any amendments thereto, and for the completeness and a

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