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

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☒ Rule 13d-1(b)

 ☐ Rule 13d-1(c)

☐ Rule 13d-1(d)

*SEE INSTRUCTIONS BEFORE FILLING OUT

**SEE ITEM 4.

*SEE INSTRUCTIONS BEFORE FILLING OUT

**SEE ITEM 4.

*SEE INSTRUCTIONS BEFORE FILLING OUT

**SEE ITEM 4.

This Amendment No. 1 to Schedule 13G (this “Amendment”) is being filed on behalf of Zimmer Partners, LP, a Delaware limited partnership (the “Investment Manager”), Zimmer Financial Services Group LLC, a Delaware limited liability company (“ZFSG”), Zimmer Partners GP, LLC, a Delaware limited liability company (the “GP”), and Stuart J. Zimmer (collectively, the “Reporting Persons”).  ZFSG is the sole member of the GP. Stuart J. Zimmer, and a trust for his benefit are the sole members of ZFSG.  The GP is the general partner of the Investment Manager.  The Investment Manager is the investment manager of ZP Master Utility Fund, Ltd. (the “Master Fund”) and ZP Master MidCap Fund, Ltd. (together with the Master Fund, the “Zimmer Accounts”).  This Amendment relates to Class A Common Stock of OPAL Fuels Inc., a Delaware Corporation, held by the Zimmer Accounts.

Item 1(a)         Name of Issuer.

OPAL Fuels Inc. (the “Issuer”)

Item 1(b)         Address of Issuer’s Principal Executive Offices.

One North Lexington Avenue, Suite 1450

White Plains, New York 10601

Item 2(a)         Name of Person Filing.

(1) Zimmer Partners, LP

(2) Zimmer Financial Services Group LLC

(3) Zimmer Partners GP, LLC

(4) Stuart J. Zimmer

Item 2(b)         Address of Principal Business Office, or, if none, Residence.

For all Filers:

9 West 57^th Street, 33rd Floor

New York, NY 10019

Item 2(c)         Citizenship or Place of Organization.

(1)            Zimmer Partners, LP is a Delaware limited partnership.

(2)            Zimmer Financial Services Group LLC is a Delaware limited liability company.

(3)            Zimmer Partners GP, LLC is a Delaware limited liability company.

(4)            Stuart J. Zimmer is a U.S. citizen.

Item 2(d)         Title of Class of Securities.

Class A Common Stock, par value $0.0001 per share (“Class A Common Stock”)

Item 2(e)         CUSIP Number.

68347P103

Item 3             Reporting Person.

If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b), check whether the person filing is a:

(c)     ☐

Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d)     ☐

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e)     ☒

An investment advisor in accordance with §240.13d-1(b)(1)(ii)(E).

(f)      ☐

An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F).

(g)     ☒

A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G).

(h)     ☐

A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813).

(i)      ☐

A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3).

(j)      ☐

Group, in accordance with §240.13d-1(b)(1)(ii)(J).

Item 4              Ownership.

Item 5             Ownership of Five Percent or Less of a Class

Not applicable.

Item 6             Ownership of More Than Five Percent on Behalf of Another Person.

The Zimmer Accounts have an indirect interest in dividends and/or sale proceeds of the shares of Class A Common Stock held by the Zimmer Accounts.

Not applicable.

Not applicable.

Not applicable

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.