OPAL Fuels Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

For the quarterly period ended March 31, 2026

or

For the transition period from _______________ to ____________

Commission File Number:001-40272

(Exact name of registrant as specified in its charter)

(914)705-4000

(Registrant's telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” "smaller reporting company," and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes☐ No☒

As of May 7, 2026, a total of 30,357,544 shares of Class A common stock, par value $0.0001 per share,121,500,000 shares of Class B common stock, par value of $0.0001 per share and 22,899,037 shares of Class D common stock, par value $0.0001 per share were outstanding.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, that involve risks and uncertainties. All statements other than statements of historical facts contained in this Quarterly Report on Form 10-Q, including statements regarding our future results of operations or financial condition, business strategy and plans and objectives of management for future operations, are forward-looking statements. Words such as “anticipates,” “believes,” "could," “estimates,” “expects,” “forecasts,” “future,” “goal,” “intends,” “may,” “objective,” “outlook,” “plans,” "potential," “projected,” “propose,” “seeks,” "should," “target,” “will,” “would” and variations of these words or similar expressions (or the negative versions of such words or expressions) are intended to identify forward-looking statements. These forward-looking statements are not guarantees of future performance, conditions or results, and involve a number of known and unknown risks, uncertainties, assumptions and other important factors, many of which are outside our control, which could cause actual results or outcomes to differ materially from those discussed in the forward-looking statements. Important factors, among others, which may affect actual results or outcomes include:

▪our ability to grow and manage growth profitably, and maintain relationships with customers and suppliers;

▪our success in retaining or recruiting, our principal officers, key employees or directors;

▪intense competition and competitive pressures from other companies in the industry in which we operate;

▪increased costs of, or delays in obtaining, key components or labor for the construction and completion of LFG (as defined below) and livestock waste projects that generate electricity and RNG (as defined below), CNG (as defined below) and hydrogen dispensing stations;

▪factors relating to our business, operations and financial performance, including market conditions and global and economic factors beyond our control;

▪the reduction or elimination of government economic incentives to the renewable energy market;

▪factors associated with companies that are engaged in the production and integration of RNG, including (i) anticipated trends, growth rates and challenges in those businesses and in the markets in which they operate, (ii) contractual arrangements with, and the cooperation of, owners and operators of the landfill and livestock biogas conversion project facilities, on which we operate our LFG and livestock waste projects that generate electricity and (iii) RNG prices for Environmental Attributes (as defined below), LCFS (as defined below) credits and other incentives;

▪the ability to identify, acquire, develop and operate renewable projects and Fueling Stations (as defined below);

▪our ability to issue equity or equity-linked securities or obtain or amend debt financing;

▪the demand for renewable energy not being sustained;

▪impacts of climate change, changing weather patterns and conditions and natural disasters; and

▪the effect of legal, tax and regulatory changes.

The forward-looking statements contained in this Quarterly Report on Form 10-Q are based on current expectations and beliefs concerning future developments and their potential effects on us. There can be no assurance that future developments affecting us will be those that we have anticipated. These forward-looking statements involve a number of risks, uncertainties (some of which are beyond our control) or other assumptions that may cause actual results or performance to be materially different from those expressed or implied by these forward-looking statements. These risks and uncertainties include, but are not limited to, those factors described under the heading “Risk Factors” in this Quarterly Report on Form 10-Q and in our Annual Report on Form 10-K, which was filed with the SEC on March 16, 2026 (our "Annual Report"). Should one or more of these risks or uncertainties materialize, or should any of our assumptions prove incorrect, actual results may vary in material respects from those projected in these forward-looking statements. We undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.

TABLE OF CONTENTS

Glossary of Key Terms

This Quarterly Report on Form 10-Q uses several terms of art that are specific to our industry and business. For the convenience of the reader, a glossary of such terms is provided here. Capitalized terms that are used in this Quarterly Report on Form 10-Q are either defined when they are first used or in the Glossary. Unless we otherwise indicate, or unless the context requires otherwise, any references in this Quarterly Report on Form 10-Q to:

“ArcLight” refers to ArcLight Clean Transition Corp. II, a blank check company incorporated as a Cayman Islands exempt company, and our previous name prior to the closing of the Business Combination.

“Business Combination” refers to the transactions contemplated by the Business Combination Agreement dated as of December 2, 2021 (as the same has been or may be amended, modified, supplemented or waived from time to time), by and among ArcLight, OPAL Fuels and OPAL Holdco.

"Central Valley" refers to the consolidated variable interest entity of Central Valley RNG Holdings LLC and its subsidiaries.

“Class A common stock” refers to the shares of Class A common stock, par value $0.0001 per share, of OPAL.

“Class B common stock” refers to the shares of Class B common stock, par value $0.0001 per share, of OPAL.

“Class C common stock” refers to the shares of Class C common stock, par value $0.0001 per share, of OPAL.

“Class D common stock” refers to the shares of Class D common stock, par value $0.0001 per share, of OPAL.

"CMS" refers to CMS RNG LLC, a consolidated variable interest entity formed on May 9, 2025 as a joint venture to develop, construct, own, and operate a renewable natural gas facility. The Company holds a 70% membership interest in CMS, with the remaining 30% owned by a third‑party partner.

“Company”, “we”, “our”, “us” or similar terms refers to OPAL Fuels Inc. individually or on a consolidated basis, as the context may require.

“Exchange Act” refers to the Securities Exchange Act of 1934, as amended.

“FASB” refers to the Financial Accounting Standards Board.

“Fortistar” refers to Fortistar LLC, a Delaware limited liability company.

“Fueling Stations” refers to facilities where (i) natural gas is dispensed into fuel tanks of vehicles for use as transportation fuel, and (ii) transactional data from the dispensing of the fuel is recorded so that Environmental Attributes can be subsequently reported, matched with the dispensed fuel to the extent sourced from RNG, and generated under the federal or state RFS or LCFS programs and other current and potential future programs aimed at providing support for RNG into the transportation market. At the Fueling Stations, the natural gas is pressurized using compressor systems and, in this state, is referred to as CNG. Because Environmental Attributes associated with RNG are nominated/assigned to the physical quantity of CNG dispensed at the Fueling Station, when the CNG is dispensed into fuel tanks for use as transportation fuel and subsequently reported to the EPA and/or state environmental agency and matched with the production of RNG, the respective RINs and LCFS credits are generated. Some of these stations are designed, developed, constructed, operated and maintained by us while others are third party stations where we may only provide maintenance services.

“Hillman” refers to Hillman RNG Investments, LLC, a Delaware limited liability company and an affiliate of Fortistar.

“OPAL Intermediate Holdco” refers to OPAL Fuels Intermediate Holding Company LLC an indirect wholly owned subsidiary of the Company.

"OPAL Term Loan" refers to the term loan agreement entered into on October 22, 2021, by OPAL Intermediate Holdco with a syndicate of lenders.

"Paragon Loan" refers to the senior secured delayed‑draw term loan and related revolving loan facilities governed by the Amended and Restated Credit Agreement, under which Paragon RNG LLC, the Company’s joint venture, is the borrower and certain of its subsidiaries are guarantors.

"PTC" and "45z" refers to Production Tax Credits.

“Sarbanes-Oxley Act” refers to the Sarbanes-Oxley Act of 2002.

“Securities Act” refers to the Securities Act of 1933, as amended.

“Sunoma” refers to Sunoma Holdings LLC and its wholly‑owned subsidiary, Sunoma Renewable Biofuel LLC, which together are owned 90% by OPAL Fuels Inc. and 10% by Paloma Dairy LLC.

"Sunoma Loan" refers to the debt agreement entered into on August 27, 2020 by Sunoma Renewable Biofuel LLC, an indirect wholly‑owned subsidiary of the Company, with Live Oak Banking Company.

In addition, the following is a glossary of key industry terms used herein:

"AAA" refers to the American Arbitration Association.

"ATM" refers to At Market Issuance Sales Agreement.

“Btu” refers to British thermal units.

“CI” refers to carbon intensity.

“CNG” refers to compressed natural gas.

“D3” refers to cellulosic biofuel with a 60% GHG reduction requirement.

“Environmental Attributes” refer to federal, state and local government incentives in the United States, provided in the form of RINs, RECs, LCFS credits, rebates, tax credits and other incentives to end users, distributors, system integrators and manufacturers of renewable energy projects, that promote the use of renewable energy.

“EPA” refers to the U.S. Environmental Protection Agency.

“GHG” refers to greenhouse gases.

“ISOs” refers to independent system operators.

"ITC" refers to Investment Tax Credit.

“LCFS” refers to Low Carbon Fuel Standard or similar types of federal and state programs.

“LFG” refers to landfill gas.

“RECs” refers to renewable energy credits.

“Renewable Power” refers to electricity generated from renewable sources.

“RFS” refers to the EPA’s Renewable Fuel Standard.

“RINs” refers to Renewable Identification Numbers.

“RNG” refers to renewable natural gas.

"ROU" refers to a Right-of-Use asset representing a lessee's rights to use a leased item.

“RVOs” refers to renewable volume obligations

“VIEs” refers to variable interest entities.