Document:

EX-10.2

 Exhibit 10.2 

Execution Version 

SPONSOR LETTER AGREEMENT 

This SPONSOR LETTER AGREEMENT (this “Agreement”) is entered into as of December 2, 2021, by and among Opal
Fuels LLC, a Delaware limited liability company (the “Company”), ArcLight Clean Transition Corp. II, an exempted company incorporated in the Cayman Islands with limited liability (“ACT”), ArcLight CTC Holdings
II, L.P., a Delaware limited partnership (the “ACT Sponsor”), each of Arno Harris, Audrey Lee, Brian Goncher and Steven Berkenfeld (collectively, the “Insiders”) and, solely for purposes of amending the
Sponsor Letter (as defined below), each of John F. Erhard, Daniel R. Revers, Marco F. Gatti, Christine M. Miller, Kerrick S. Knauth (collectively, the “Officers”). Each of the Company, ACT, the ACT Sponsor and each of the Insiders
are sometimes referred to herein individually as a “Party” and collectively as the “Parties.” Each of the ACT Sponsor and each of the Insiders are sometimes referred to herein individually as
a “Shareholder.” Except as otherwise specified herein, capitalized terms used but not otherwise defined herein shall have the meanings ascribed to them in the Business Combination Agreement (as defined below). 

WHEREAS, concurrently with the execution of this Agreement, ACT, the Company and Opal HoldCo LLC, a Delaware limited liability company
and the record and beneficial owner of a majority of the voting and economic rights of the Company (“Opal HoldCo”), entered into that certain Business Combination Agreement (as amended, supplemented or otherwise modified from time
to time in accordance with its terms, the “Business Combination Agreement”); 
 WHEREAS, the Business
Combination Agreement contemplates that, on the terms and subject to the conditions therein, on the Closing Date, ACT will acquire the equity interests and equity-linked securities of the Company, with ACT becoming the sole managing member of the
Company (collectively, and together with the other transactions contemplated by the Business Combination Agreement and the Ancillary Documents, the “Transactions”); 

WHEREAS, reference is hereby made to the following Contracts (collectively, the “Affected Agreements”): 

(A) that certain Letter Agreement dated March 25, 2021 and delivered by the ACT Sponsor, the Insiders and the Officers to ACT
(the “Sponsor Letter”); 
 (B) that certain Warrant Agreement dated March 25, 2021 between ACT and Continental
Stock Transfer & Trust Company, a New York corporation, as warrant agent (the “Warrant Agent” and, such agreement, the “Warrant Agreement”); and 

(C) that certain Registration and Shareholder Rights Agreement dated March 25, 2021 by and among ACT, the ACT Sponsor and certain other
equityholders named therein; 
 WHEREAS, as of the date hereof, each Shareholder, in its respective capacity as such, is the holder
of record and the “beneficial owner” (within the meaning of Rule 13d-3 under the Exchange Act) of the number of (i) Pre-Closing ACT Class A Shares,
(ii) private placement warrants (the “Warrants”) to purchase an aggregate number of Pre-Closing ACT Class A Shares and/or
(iii) Pre-Closing ACT Class B Shares, in each case, set forth on Exhibit A attached hereto opposite such person’s name on such Exhibit (collectively, with respect to
each Shareholder, the “Subject Securities”); 

 WHEREAS, as part of the Transactions, each of the
Pre-Closing ACT Class B Shares will be converted into one Pre-Closing ACT Class A Share and, subsequently, into one Post-Closing ACT Class A Share; 

WHEREAS, in connection with the Transactions, at the Closing, each of ACT, Opal HoldCo, Ares, Hillman, NextEra, the Company and each of
the Shareholders will enter into the Investor Rights Agreement; 
 WHEREAS, in consideration for the benefits to be received by the
ACT Sponsor and each of the Insiders under the terms of the Business Combination Agreement and as a material inducement to the Company and ACT agreeing to enter into and consummate the transactions contemplated by the Business Combination Agreement,
the ACT Sponsor and each of the Insiders agrees to enter into this Agreement and to be bound by the applicable agreements, covenants and obligations contained in this Agreement; and 

WHEREAS, the Parties acknowledge and agree that the Company and ACT would not have entered into and agreed to consummate the
transactions contemplated by the Business Combination Agreement without each of the Shareholders entering into this Agreement and agreeing to be bound by the applicable agreements, covenants and obligations contained in this Agreement. 

AGREEMENT 
 NOW,
THEREFORE, in consideration of the premises and the mutual promises set forth herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties and, solely for purposes of amending
the Sponsor Letter, the Officers, each intending to be legally bound, hereby agree as follows: 
 1. Sponsor Letter. The Company, ACT,
the ACT Sponsor, each Insider and each Officer hereby agree as follows: 
 (a) The Sponsor Letter acknowledges in Section 3 thereof that
ACT shall not enter into a definitive agreement regarding a Business Combination (as defined therein) without the prior consent of the ACT Sponsor. The Transactions constitute a Business Combination for purposes of the Sponsor Letter and the ACT
Sponsor hereby consents to entry into the Business Combination Agreement. 
 (b) The Sponsor Letter provides in Section 3 thereof for
certain requirements of the ACT Sponsor, the Insiders and the Officers in respect of a Business Combination (in each case, as defined therein), including in respect of voting all Founder Shares and Public Shares (in each case, as defined therein)
beneficially owned by the ACT Sponsor and by the Insiders (the “Shares”), as applicable, in favor of such Business Combinations and forgoing redemption rights in respect thereof. The Transactions constitute a Business Combination
for purposes of the Sponsor Letter and the ACT Sponsor, each Insider and each Officer will comply with its, his or her respective obligations under Section 3 of the Sponsor Letter. In furtherance of such obligations, and without limiting the
prior sentence, each Shareholder agrees, that prior to the Expiration Date (as defined below), at any meeting of ACT’s shareholders or any adjournment or postponement thereof, or in connection with any written consent of ACT’s
shareholders, with respect to the Transactions, such Shareholder shall: 

  
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	 	i.	 appear at such meeting or otherwise cause all Shares to be counted as present thereat for purposes of
calculating a quorum; and 

  

	 	ii.	 from and after the date hereof until the Expiration Date, vote (or cause to be voted) or deliver a written
consent (or cause a written consent to be delivered) covering all of the Shares that such Shareholder shall be entitled to so vote: (A) in favor of adoption and approval of the Business Combination Agreement, the Transactions and any other
proposals recommended by ACT’s board of directors in connection with the Transaction as to which shareholders of ACT are called upon to vote or consent to; (B) against any action or agreement that would reasonably be expected to result in
a breach in any material respect of any covenant, representation or warranty or any other obligation or agreement of ACT or its Affiliates under the Business Combination Agreement or that would reasonably be expected to result in any of the
conditions to ACT’s or any of its Affiliates’ obligations under the Business Combination Agreement not being fulfilled; and (iii) against any ACT Acquisition Proposal, or any agreement, transaction or other matter that is intended to,
or would reasonably be expected to, impede, interfere with, delay, postpone, discourage or materially and adversely affect the consummation of the Transactions. The Shareholders shall not take or commit or agree to take any action inconsistent with
the foregoing. 

 (c) Subject to, and conditioned upon the occurrence and effective as of, the Closing, Section 5 of
the Sponsor Letter shall be amended and restated to provide in its entirety as follows: “[Reserved].” 
 (d) Section 4 of the
Sponsor Letter is hereby amended and restated to provide in its entirety as follows: “[Reserved].” For the avoidance of doubt, if the Business Combination Agreement is terminated in accordance with its terms, then this clause (d) (and the
amendment and restatement contemplated by this clause (d)) shall be of no further force and effect and Section 4 of the Sponsor Letter shall be reinstated and effective from and after such time. 

(e) As used herein, “Expiration Date” means the earliest to occur of (i) the Closing, (ii) such date and time as the
Business Combination Agreement shall be terminated in accordance with its terms, and (iii) upon the mutual written agreement of the Parties. 

2. Earn-Out Shares. 

(a) Subject to, and conditioned upon the occurrence of and effective immediately after the Closing, (i) 5% of the Post-Closing ACT Class A
Shares beneficially owned by the ACT Sponsor immediately following the Closing resulting from the conversion of the Pre-Closing ACT Class B Shares in connection with the Transactions (rounded up to the
nearest whole share) shall be subject to the provisions set forth below in this Section 2 (such shares, the “First  

  
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50% Earn-Out Shares”), (ii) an additional 5% of the Post-Closing ACT Class A Shares beneficially owned by the ACT Sponsor
immediately following the Closing resulting from the conversion of the Pre-Closing ACT Class B Shares in connection with the Transactions (rounded up to the nearest whole share) shall be subject to the
provisions set forth below in this Section 2 (such shares, the “Second 50% Earn-Out Shares” and, together with the First 50% Earn-Out Shares, the “Earn-Out Shares”) and (iii) the remaining 90% of the Post-Closing ACT Class A Shares beneficially owned by the ACT
Sponsor immediately following the Closing resulting from the conversion of the Pre-Closing ACT Class B Shares in connection with the Transactions (rounded down to the nearest whole share) shall not be
subject to the provisions set forth below in this Section 2 (such shares, the “Retained Shares”). 

(b) Subject to, and conditioned upon the occurrence of and effective immediately after the Closing, the
Earn-Out Shares shall be unvested and subject to the restrictions and forfeiture provisions set forth in this Section 2. The Earn-Out Shares
shall vest and be released from the provisions set forth in this Section 2 as follows if, during the 60 months following the Closing (the final day of such period, the
“Earn-Out End Date”): 
  

	 	i.	 (A) the VWAP of the Post-Closing ACT Class A Shares over any 20 Trading Days within any 30
consecutive Trading Day period is greater than or equal to $12.50 per share; or (B) a Sale (as defined below) is consummated in which the Post-Closing ACT Class A Shares are valued at greater than or equal to $12.50 per share, in which the
case of either (A) or (B), the First 50% Earn-Out Shares shall vest upon the close of market on the 20th such Trading Day or as of immediately prior to the closing of such Sale, respectively; and

  

	 	ii.	 (A) the VWAP of the Post-Closing ACT Class A Shares over any 20 Trading Days within any 30
consecutive Trading Day period is greater than or equal to $15.00 per share; or (B) a Sale is consummated in which the Post-Closing ACT Class A Shares are valued at greater than or equal to $15.00 per share, in which the case of either
(A) or (B), such Second 50% Earn-Out Shares shall vest upon the close of market on the 20th such Trading Day or as of immediately prior to the closing of such Sale, respectively; 

(each of the occurrences described in the foregoing clauses (i) and (ii), an “Earn-Out Event”).
Any Earn-Out Shares that have not vested in accordance with this Section 2(b) on or before the Earn-Out End Date will be immediately forfeited
at 11:59 p.m., New York, New York time on the Earn-Out End Date. For purposes of this Agreement, “Sale” means (A) a direct or indirect sale, lease, exchange or other transfer (regardless of the
form of the transaction) in one transaction or a series of related transactions of a majority of ACT’s assets, as determined on a consolidated basis, to a third party or third parties acting as a “group” (as defined in
Section 13(d)(3) of the Exchange Act) or (B) any transaction or series of transactions that results, directly or indirectly, in the shareholders of ACT as of immediately prior to such transactions holding, in the aggregate, less than 50%
of the voting Equity Securities of ACT (or any successor of ACT) immediately after the consummation thereof (excluding, for the avoidance of doubt, any Earn-out Shares), in the case of each of clause
(A) or (B), whether by amalgamation, merger, consolidation, arrangement, tender offer, recapitalization, purchase, issuance, sale or transfer of Equity Securities or assets or otherwise. 

  
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 (c) The ACT Sponsor agrees that it shall not engage in any Transfer (as defined in the
Sponsor Letter) with respect to any Earn-Out Shares until such time as the Earn-Out Shares have vested pursuant to Section 2(b).
Notwithstanding the foregoing or anything to the contrary herein, (i) the ACT Sponsor (and, for the avoidance of doubt, any permitted transferees pursuant to this clause (i)) may transfer all or any of the
Earn-Out Shares to a Permitted Transferee (as defined in the Investor Rights Agreement), provided that the transferee shall, in addition to any requirements in the Investor Rights Agreement, agree in
writing that he, she or it is receiving and holding such Earn-Out Shares subject to the provisions of this Section 2 and (ii) from and after a transfer pursuant to clause
(i) of this sentence, all references to the ACT Sponsor in this Section 2 shall include such transferee and shall collectively mean the ACT Sponsor (to the extent that it then holds
Earn-Out Shares) and each permitted transferee of Earn-Out Shares pursuant to clause (i) of this sentence (in each case, to the extent he, she or it then holds Earn-Out Shares). Each transferee of Earn-Out Shares pursuant to clause (i) of the preceding sentence shall be a third party beneficiary of this
Section 2. 
 (d) As used herein, “Trading Day” means any day on which trading is generally conducted on
Nasdaq or any other exchange on which the Post-Closing ACT Class A Shares are traded on or after the Closing and on or prior to the Earn-Out End Date. The Earn-Out
Shares, the applicable Earn-Out Event (and all references to Post-Closing ACT Class A Shares and each of the foregoing in this Agreement) and the $12.50 and $15.00 per share price referenced in
Section 2(b) shall each be adjusted appropriately to reflect the effect of any stock split, reverse stock split, stock dividend (including any dividend or other distribution of securities convertible into Post-Closing ACT
Class A Shares), reorganization, recapitalization, reclassification, combination, exchange of shares or other like change in respect of the Post-Closing ACT Class A Shares (or any other Equity Securities into which they are adjusted
pursuant to this Section 2(d)) at any time prior to the vesting of the Earn-Out Shares pursuant to this Section 2 so as to provide the holders of the Earn-Out Shares with the same economic effect as contemplated by this Section 2 prior to such event and as so adjusted shall, from and after the date of such event, be the Earn-Out Shares and the Earn-Out Events, as applicable. 
 (e) The
Company shall use reasonable best efforts to remain listed as a public company on, and for the Earn-Out Shares to be tradable over, Nasdaq or any other nationally recognized U.S. stock exchange;
provided, however, the foregoing shall not limit the Company or any of its Affiliates from consummating a Sale or entering into a definitive agreement that contemplates a Sale. Subject to this Section 2, upon
the consummation of a Sale, the Company shall have no further obligations under this Section 2(e). 
 (f) At the
time that the Earn-Out Shares become vested pursuant to this Section 2, the Company shall remove any legends, stock transfer restrictions, stop transfer orders or similar restrictions
with respect to the Earn-Out Shares related to such vesting or this Section 2 (other than, for the avoidance of doubt, those that relate to any applicable and then-existing Lock-Up Period (as defined in the Investor Rights Agreement) with respect to such Earn-Out Shares). 

  
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 (g) For the avoidance of doubt, (i) the ACT Sponsor shall retain all of its rights as a
stockholder of the Company with respect to the Earn-Out Shares owned by it during any period of time that such shares are subject to restriction on transfer or sale hereunder, including the right to vote any
such shares and the right to receive dividends and other distributions with respect to such Earn-Out Shares prior to vesting (provided that dividends and other distributions with respect to Earn-Out Shares that are subject to vesting and are unvested at the time of such dividend or distribution shall be set aside by the Company and shall only be paid to such holders upon the vesting of such Earn-Out Shares (and, if any dividends or other distributions with respect to Earn-Out Shares are set aside and such Earn-Out Shares
are subsequently forfeited pursuant to this Section 2, such set aside dividends or distributions shall become the property of the Company)), (ii) any Earn-Out Shares that vest in
accordance with the terms of this Section 2 shall remain subject to any applicable Lock-Up Period set forth in the Investor Rights Agreement and (iii) notwithstanding the
expiration of any Lock-Up Period with respect to any Earn-Out Shares, such shares shall remain subject to any applicable restrictions set forth this
Section 2. 
 (h) The ACT Sponsor intends to make a protective election under Section 83(b) of the Code with
respect to the Earn-Out Shares. 
 3. Anti-Dilution Adjustment Waiver. Subject to, and
conditioned upon the occurrence of and effective as of immediately prior to the Closing, the ACT Sponsor, which is the holder of at least a majority of the outstanding Pre-Closing ACT Class B Shares as of
the date hereof, hereby waives on behalf of the holders of all Pre-Closing ACT Class B Shares, pursuant to and in compliance with ACT’s Governing Documents, any adjustment to the conversion ratio set
forth therein, and any rights to other anti-dilution protections with respect to the Pre-Closing ACT Class B Shares, that may result from the PIPE Financing and/or the consummation of the Transactions.

 4. ACT Expenses. No later than three Business Days prior to the Closing, ACT shall deliver to the Company a reasonably detailed
calculation of the ACT Expenses, along with reasonably detailed supporting documentation. To the extent such ACT Expenses, in the aggregate, would exceed $26,000,000 as of the Closing Date (including, without limitation, any ACT Expenses to be
incurred, to arise or to accrue as a result of the Closing) (such excess ACT Expenses, the “Excess Act Expenses”), the ACT Sponsor shall pay or cause to be paid to the Company such Excess ACT Expenses either (a) in cash by wire
transfer of immediately available funds, pursuant to written wire instructions provided by the Company no later than two Business Days prior to the Closing, (b) by forfeiting Shares (other than Earn-Out
Shares) beneficially owned by the ACT Sponsor to ACT for cancellation (with each Share valued at $10.00 per share for such purposes) or (c) by a combination of cash or forfeited Shares as provided in clauses (a) and (b). 

5. Other Covenants and Agreements. 

(a) Each Shareholder hereby agrees to be bound by and subject to (i) Sections 5.3(a) (Confidentiality and Access to Information) and 5.4
(Public Announcements) of the Business Combination Agreement to the same extent as such provisions apply to the parties thereto, as if such Shareholder is directly a party thereto, and (ii) Section 5.7 (ACT Exclusive Dealing) of the
Business Combination Agreement to the same extent as such provisions apply to ACT, as if such Shareholder is directly party thereto. 

  
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 (b) If applicable, prior to the Closing, each Shareholder hereby agrees to as promptly as
practicable execute and deliver all additional agreements, documents or instruments, take, or cause to be taken, all actions and provide, or cause to be provided, all additional information or other materials as may be necessary or reasonably
advisable, in each case, as mutually reasonably determined and agreed to by ACT and the Company (such determination and agreement not to be unreasonably withheld, conditioned or delayed by either ACT or the Company), in connection with, or otherwise
in furtherance of, the transactions and the other covenants and agreements contemplated by the Business Combination Agreement or this Agreement (provided, however, that in no event shall any Shareholder be obligated to take, approve or
consent to any action that would result in any adverse economic or other material change to the Business Combination Agreement, this Agreement or any other Ancillary Document to which he, she or it is or will be a party). If applicable, from and
after the Closing, the ACT Sponsor and the Company each hereby agrees to as promptly as practicable execute and deliver execute and deliver all additional agreements, documents or instruments, take, or cause to be taken, all actions and provide, or
cause to be provided, all additional information or other materials as may be reasonably necessary to effectuate the purpose of the covenants and agreements of this Agreement that survive the Closing. Notwithstanding the foregoing, no Shareholder or
the Company shall be required to provide any information that is, based on the advice of outside counsel, subject to legal privilege. 
 (c)
Each Shareholder acknowledges and agrees that ACT and the Company are entering into the Business Combination Agreement in reliance upon such Shareholder entering into this Agreement and agreeing to be bound by, and perform, or otherwise comply with,
as applicable, the applicable agreements, covenants and obligations contained in this Agreement and, but for each Shareholder entering into this Agreement and agreeing to be bound by, and perform, or otherwise comply with, as applicable, the
applicable agreements, covenants and obligations contained in this Agreement, ACT and the Company would not have entered into or agreed to consummate the transactions contemplated by the Business Combination Agreement. 

6. Shareholder Representations and Warranties. Each Shareholder represents and warrants, as of the date hereof, solely with respect to
himself, herself or itself, and not on behalf of any other Shareholder, to the Company and ACT as follows: 
 (a) The Shareholder (if not an
individual) is a corporation, limited liability company or other applicable business entity duly organized or formed, as applicable, validly existing and in good standing (or the equivalent thereof, if applicable, in each case, with respect to the
jurisdictions that recognize the concept of good standing or any equivalent thereof) under the Laws of its jurisdiction of formation or organization (as applicable). 

(b) The Shareholder (if not an individual) has the requisite corporate, limited liability company or other similar power and authority and, if
the Shareholder is an individual, legal capacity to execute and deliver this Agreement, to perform his, her or its covenants, agreements and obligations hereunder (including, for the avoidance of doubt, those covenants, agreements and obligations
hereunder that relate to the provisions of the Business Combination Agreement), and to consummate the transactions contemplated hereby. The execution and delivery of this Agreement has been duly authorized by all necessary corporate or other action
on the part of the Shareholder. This Agreement has been duly and validly executed and delivered by the 

  
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Shareholder and constitutes a valid, legal and binding agreement of the Shareholder (assuming that this Agreement is duly authorized, executed and delivered by the other parties hereto),
enforceable against the Shareholder in accordance with its terms (subject to applicable bankruptcy, insolvency, reorganization, moratorium or other Laws affecting generally the enforcement of creditors’ rights and subject to general principles
of equity). 
 (c) No consent, approval or authorization of, or designation, declaration or filing with, any Governmental Entity is required
on the part of the Shareholder with respect to the Shareholder’s execution, delivery or performance of his, her or its covenants, agreements or obligations under this Agreement (including, for the avoidance of doubt, those covenants, agreements
and obligations under this Agreement that relate to the provisions of the Business Combination Agreement) or the consummation of the transactions contemplated hereby, except for (i) any filings with the SEC related to his, her or its ownership
of Equity Securities of ACT or the transactions contemplated by the Business Combination Agreement, this Agreement or any other Ancillary Documents to which he, she or it is a party, or (ii) any other consents, approvals, authorizations,
designations, declarations, waivers or filings, the absence of which would not reasonably be expected to adversely affect the ability of the Shareholder to perform, or otherwise comply with, any of his, her or its covenants, agreements or
obligations hereunder in any material respect. 
 (d) None of the execution or delivery of this Agreement by the Shareholder, the performance
by the Shareholder of any of his, her or its covenants, agreements or obligations under this Agreement or the consummation of the transactions contemplated hereby will, directly or indirectly (with or without due notice or lapse of time or
both) (i) if the Shareholder is not an individual, result in any breach of any provision of the Shareholder’s Governing Documents, (ii) result in a violation or breach of, or constitute a default or give rise to any right of
termination, Consent, cancellation, amendment, modification, suspension, revocation or acceleration under, any of the terms, conditions or provisions of any Contract to which the Shareholder is a party, (iii) violate, or constitute a breach
under, any Order or applicable Law to which the Shareholder or any of his, her or its properties or assets are bound or (iv) other than the restrictions contemplated by this Agreement, the Business Combination Agreement or any other Ancillary
Document to which such Shareholder is or will be a party, result in the creation of any Lien upon the Subject Securities (other than as expressly provided under this Agreement), except, in the case of any of clauses (ii)
and (iii) above, as would not reasonably be expected to adversely affect the ability of the Shareholder to perform, or otherwise comply with, any of his, her or its covenants, agreements or obligations hereunder in any material respect.

 (e) The Shareholder is, as of the date hereof, the record and beneficial owner of the Subject Securities as set forth on Exhibit A
hereto. The Shareholder has the sole right to vote (and provide consent in respect of, as applicable) the Subject Securities set forth on Exhibit A hereto as of the date hereof. Except for this Agreement, the Business Combination Agreement,
the other Ancillary Documents to which he, she or it is or will be a party, the Affected Agreements and the Governing Documents of ACT, the Shareholder is not party to or bound by (i) any option, warrant, purchase right or other Contract that
would reasonably be expected (either alone or in connection with one or more events, developments or events (including the satisfaction or waiver of any conditions precedent)) to require the Shareholder to Transfer any of the Subject Securities or
(ii) any voting trust, proxy or other Contract with respect to the voting or Transfer of any of the Subject Securities, in the case of either clause (i) or (ii), that would reasonably be expected to adversely affect the ability of the
Shareholder to perform, or otherwise comply with, any of his, her or its covenants, agreements or obligations hereunder in any material respect. 

  
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 (f) There is no Proceeding pending or, to the Shareholder’s knowledge, threatened
against or involving the Shareholder or any of his, her or its Affiliates that, if adversely decided or resolved, would reasonably be expected to adversely affect the ability of the Shareholder to perform, or otherwise comply with, any of its
covenants, agreements or obligations under this Agreement in any material respect. 
 (g) The Shareholder, on his, her or its own behalf and
on behalf of his, her or its Representatives, acknowledges, represents, warrants and agrees that he, she or it has conducted his, her or its own independent review and analysis of, and, based thereon, has formed an independent judgment concerning,
the business, assets, condition, operations and prospects of, the Company and the Transactions as he, she or it and his, her or its Representatives have deemed necessary to enable him, her or it to make an informed decision with respect to the
execution, delivery and performance of this Agreement and the Transactions. 
 (h) In entering into this Agreement, the Shareholder has
relied solely on his, her or its own investigation and analysis and the representations and warranties expressly set forth herein and no other representations or warranties of ACT, the Company or any other Person, either express or implied, and the
Shareholder, on his, her or its own behalf and on behalf of his, her or its Representatives, acknowledges, represents, warrants and agrees that, except for the representations and warranties expressly set forth in this Agreement, none of ACT, the
Company or any other Person makes or has made any representation or warranty, either express or implied, to the Shareholder in connection with or related to this Agreement, the Business Combination Agreement or the other Ancillary Documents or the
transactions contemplated hereby or thereby. 
 7. Company and ACT Acknowledgement. In entering into this Agreement, the Business
Combination Agreement and the other Ancillary Documents to which it is or will be a party, neither of the Company nor ACT have relied on any representations or warranties of any Shareholder, either express or implied, except for the representations
and warranties of the Shareholders expressly set forth in this Agreement or in such other Ancillary Documents to which such Shareholders is or will be a party and to which ACT or the Company, as applicable, is or will be a party. 

8. Transfer of Subject Securities. From and after the date hereof and until the earlier of (a) the termination of this Agreement in
accordance with its terms and (b) the Closing, each Shareholder agrees not to (i) Transfer (as defined in the Sponsor Letter) any of the Subject Securities, (ii) enter into (A) any option, warrant, purchase right, or other
Contract that would reasonably be expected (either alone or in connection with one or more events, developments or events (including the satisfaction or waiver of any conditions precedent)) to require the Shareholder to Transfer the Subject
Securities or (B) any voting trust, proxy or other Contract with respect to the voting or Transfer of the Subject Securities, or (iii) take any actions in furtherance of any of the matters described in the foregoing clauses (i) or
(ii); provided, that , notwithstanding any other provision of this Agreement to the contrary, each Shareholder shall be permitted to make transfers to its Affiliates and limited partners, or its or their Affiliates, members or limited
partners, 

  
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so long as (x) prior to any such transfer, such Shareholder shall deliver a written notice of such Transfer to the Company and, (y) as a condition to any such transfer, such permitted
transferee shall execute a joinder and acknowledgement reasonably satisfactory to the Company agreeing to be bound by and made a party to this Agreement; provided, further, that, any such transfer shall not relieve, discharge or
otherwise modify the obligations of such Shareholder under this Agreement. 
 9. Termination. This Agreement shall automatically
terminate, without any notice or other action by any Party or Officer, and be void ab initio, upon the termination of the Business Combination Agreement in accordance with its terms. Upon termination of this Agreement as provided in the
immediately preceding sentence, none of the Parties or Officers shall have any further obligations or Liabilities under, or with respect to, this Agreement. Notwithstanding the foregoing or anything to the contrary in this Agreement, (a) the
termination of this Agreement shall not affect any Liability on the part of any Party or Officer for a Willful Breach of any covenant or agreement set forth in this Agreement prior to such termination or Fraud,
(b) Section 6, this Section 8 and the representations and warranties set forth in Sections 5(g) and (h) shall each survive any termination of this Agreement, and
(c) Sections 9 through 17 shall survive any termination of this Agreement. For purposes of this Agreement, (x) “Willful Breach” means a material breach of this Agreement that is a consequence of an act or a
failure to act by the breaching Party or Officer with the knowledge that the taking of such act or such failure to act would, or would reasonably be expected to, constitute or result in a breach of this Agreement and (y) “Fraud”
means an act or omission by a Party, and requires: (i) a false or incorrect representation or warranty expressly made by such Party in this Agreement, (ii) with actual knowledge (as opposed to constructive, imputed or implied knowledge) by
the Party making such representation or warranty that such representation or warranty expressly set forth in this Agreement is false or incorrect, (iii) an intention to deceive another Party, to induce him, her or it to enter into this
Agreement, (iv) another Party, in justifiable or reasonable reliance upon such false or incorrect representation or warranty expressly set forth in this Agreement, entering into this Agreement, and (v) another Party suffering damage by
reason of such reliance. For the avoidance of doubt, “Fraud” does not include any claim for equitable fraud, promissory fraud, unfair dealings fraud or any torts (including a claim for fraud or alleged fraud) based on negligence or
recklessness. 
 10. No Other Capacity. Notwithstanding anything in this Agreement to the contrary, (a) no Shareholder makes any
agreement or understanding herein in any capacity other than in such Shareholder’s capacity as a record holder and beneficial owner of the Subject Securities (i.e., if such Shareholder is an individual, not in such Shareholder’s capacity
as a director, officer or employee of ACT); and (b) nothing herein will be construed to limit or affect any action or inaction by (i) an Insider or (ii) in the case of the ACT Sponsor, any representative of the ACT Sponsor serving as
a member of the board of directors of ACT or as an officer, employee or fiduciary of ACT, in each case, acting in such person’s capacity as a director, officer, employee or fiduciary of ACT (which such actions shall be governed by the Business
Combination Agreement or such other Ancillary Agreements applicable to action or inaction taken in such capacity). 
 11. Notices. All
notices, requests, claims, demands and other communications hereunder shall be in writing and shall be given (and shall be deemed to have been duly given) by delivery in person, by e-mail (having obtained
electronic delivery confirmation thereof (i.e., an electronic record of the sender that the email was sent to the intended recipient thereof without an “error” or similar message that such email was not received by such intended
recipient)), or by registered or certified mail (postage prepaid, return receipt requested) (upon receipt thereof) to the other Parties as follows: 

  
 10 

 If to ACT or the ACT Sponsor, to: 

c/o ArcLight Clean Transition Corp. II 

200 Clarendon Street, 55th Floor 

Boston, MA 02116 
 Attention:
        General Counsel 
 Email:
              christine.miller@arclightclean.com 
 with a copy (which
shall not constitute notice) to: 
 Kirkland & Ellis LLP 

609 Main Street 
 Houston, TX
77002 
 Attn:                 Doug Bacon, P.C. 

                Julian Seiguer, P.C. 

                Jennifer R. Gasser 

E-mail:
            douglas.bacon@kirkland.com 

                julian.seiguer@kirkland.com

                jennifer.gasser@kirkland.com

 If to the Company, to: 

Opal Fuels LLC 
 One North
Lexington Avenue Suite 1450 
 White Plains, NY 10601 

Attn.:                John H. Coghlin, General Counsel 

Email:               jcoghlin@opalfuels.com 

with a copy (which shall not constitute notice) to: 

Sheppard, Mullin, Richter & Hampton LLP 

30 Rockefeller Plaza 
 New York,
New York 10112 
 Attn.:                Andrew M. Felner 

                John H. Booher 

Email:               afelner@sheppardmullin.com 

                jbooher@sheppardmullin.com

 if to an Insider or an Officer, to the address on the Insider’s or Officer’s respective signature page hereto; 

or to such other address as the party to whom notice is given may have previously furnished to the others in writing in the manner set forth above. 

  
 11 

 1. Entire Agreement. This Agreement, the Business Combination Agreement and documents
referred to herein and therein (including the Ancillary Documents) constitute the entire agreement of the Parties and Officers with respect to the subject matter of this Agreement, and supersede all prior agreements and undertakings, both written
and oral, among the Parties and Officers with respect to the subject matter of this Agreement, except as otherwise expressly provided in this Agreement. In the event and to the extent that there shall be a conflict between the provisions of this
Agreement and the provisions of any Affected Agreement, this Agreement shall control with respect to the subject matter thereof. 
 2.
Amendments and Waivers; Assignment. Any provision of this Agreement may be amended or waived if, and only if, such amendment or waiver is in writing and signed by the Shareholders, the Company and ACT. Notwithstanding the foregoing, no
failure or delay by any Party or Officer, as applicable, in exercising any right hereunder shall operate as a waiver thereof nor shall any single or partial exercise thereof preclude any other or further exercise of any other right hereunder.
Subject to Section 2(d), neither this Agreement nor any of the rights, interests or obligations hereunder shall be assignable by a Shareholder or the Company without ACT’s prior written consent (to be withheld or given
in its sole discretion) or by ACT or a Shareholder without the Company’s prior written consent (to be withheld or given in its sole discretion). Any attempted assignment of this Agreement not in accordance with the terms of this
Section 13 shall be null and void ab initio. 
 3. Fees and Expenses. Except, in the case of ACT and
the Company, as otherwise expressly set forth in the Business Combination Agreement, and without limitation to Section 4, all fees and expenses incurred in connection with this Agreement and the transactions contemplated
hereby, including the fees and disbursements of counsel, financial advisors and accountants, shall be paid by the Party incurring such fees or expenses; provided, that, any such reasonable and documented fees and expenses incurred by the
Shareholders in connection with this Agreement and the transactions contemplated hereby on or prior to the Closing shall be deemed to be fees and expenses of ACT or the ACT Sponsor, as applicable. 

4. No Third Party Beneficiaries. Except as set forth in Section 2(d), this Agreement shall be for the sole
benefit of the Parties and their respective successors and permitted assigns and is not intended, nor shall be construed, to give any Person, other than the Parties and their respective successors and permitted assigns, any legal or equitable right,
benefit or remedy of any nature whatsoever by reason this Agreement. Nothing in this Agreement, expressed or implied, is intended to, or shall be deemed to, create a joint venture. 

5. Miscellaneous. Sections 8.5 (Governing Law), 8.7 (Construction; Interpretation), 8.10 (Severability),
8.11 (Counterparts; Electronic Signatures), 8.15 (Waiver of Jury Trial), 8.16 (Submission to Jurisdiction) and 8.17 (Remedies) of the Business Combination Agreement are incorporated herein by reference and shall apply to
this Agreement, mutatis mutandis. 
 6. No Ownership Interest. Nothing contained in this Agreement will be deemed to vest in
the Company, any Company Affiliated Party, or any ACT Affiliated Party any direct or indirect ownership or incidents of ownership of or with respect to the Subject Securities. All rights, ownership and economic benefits of and relating to the
Subject Securities shall remain vested in and belong to each Shareholder, and the Company and ACT (and each other Company Affiliated Party and ACT Affiliated Party) shall have no authority to manage, direct, superintend, restrict, regulate, govern
or administer any of the policies or operations of Company or exercise any power or authority to direct any Shareholder in the voting of any of the Subject Securities, except as otherwise expressly provided herein with respect to the Subject
Securities. Except as otherwise set forth in Section 1, no Shareholder shall be restricted from voting in favor of, against or abstaining with respect to any other matters presented to the stockholders of ACT. 

  
 12 

 7. No Recourse. Except for claims pursuant to the Business Combination Agreement or
any Ancillary Document by any party(ies) thereto against any other party(ies) on the terms and subject to the conditions therein, each Party agrees that (a) this Agreement may only be enforced against, and any action for breach of this
Agreement may only be made against, the Parties, and no claims of any nature whatsoever arising under or relating to this Agreement, the negotiation hereof or its subject matter, or the transactions contemplated hereby shall be asserted against any
Person that is not a Party, and (b) without limiting the generality of the foregoing, no Person that is not a Party shall have any Liability arising out of or relating to this Agreement, the negotiation hereof or its subject matter, or the
transactions contemplated hereby, including with respect to any claim (whether in tort, contract or otherwise) for breach of this Agreement or in respect of any written or oral representations made or alleged to be made in connection herewith,
except as expressly provided herein. Notwithstanding anything to the contrary in this Agreement, (i) in no event shall any Shareholder have any obligations or Liabilities related to or arising out of the covenants, agreements, obligations,
representations or warranties of any other Shareholder under this Agreement (including related to or arising out of the breach of any such covenant, agreement, obligation, representation or warranty by any other Shareholder), and (ii) in no
event shall ACT have any obligations or Liabilities related to or arising out of the covenants, agreements, obligations, representations or warrants of any Shareholder under this Agreement (including related to or arising out of any breach of any
such covenant, agreement, obligation, representation or warranty by any such Shareholder). 
 8.
Non-Survival. The representations, warranties, agreements and covenants in this Agreement shall terminate at the Closing, except for those covenants and agreements in this Agreement that, by their
terms, expressly contemplate performance or survival after the Closing (including, without limitation, Sections 1(c), 2, 3, 4, 5(a), and 9 through and including 19) which covenants and agreements shall so survive the Closing in
accordance with their terms; provided that the foregoing shall not limit any Party’s rights in the event of another Party’s Willful Breach of any agreement and covenant set forth in Section 8 prior to the Closing. 

[Signature pages follow.] 

  
 13 

 IN WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	OPAL FUELS LLC
		
	By:	 	 /s/ Adam Comora

	Name: Adam Comora
	Title: Co-CEO

 [Signature Page to Sponsor Letter Agreement] 

 N WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	ARCLIGHT CLEAN TRANSITION CORP. II
		
	By:	 	 /s/ John F. Erhard

	Name: John F. Erhard
	Title: President and Chief Executive Officer

 [Signature Page to Sponsor Letter Agreement] 

 IN WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	ARCLIGHT CTC HOLDINGS II, L.P.
	
	By: ACTC HOLDINGS GP II, LLC, its general partner
	
	By: ARCLIGHT CAPITAL HOLDINGS, LLC, its Manager
	By: ACHP II, L.P., its Managing Member
	By: ACH GP, LLC, its General Partner
		
	By:	 	 /s/ Daniel R. Revers

	Name: Daniel R. Revers
	Title: Manager

 [Signature Page to Sponsor Letter Agreement] 

 IN WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	OFFICERS
	
	 /s/ John F. Erhard

	Name: John F. Erhard
	Address:	 	  

		 	  

 [Signature Page to Sponsor Letter Agreement] 

 IN WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	OFFICERS
	
	 /s/ Daniel R. Revers

	Name: Daniel R. Revers
	Address:	 	  

		 	  

 [Signature Page to Sponsor Letter Agreement] 

 IN WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	 OFFICERS

	
	 /s/ Marco F. Gatti

	 Name: Marco F. Gatti

	 Address:
	 	  

		 	  

 [Signature Page to Sponsor Letter Agreement] 

 IN WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	OFFICERS
	
	 /s/ Christine M. Miller

	Name: Christine M. Miller
	Address:	 	  

		 	  

 [Signature Page to Sponsor Letter Agreement] 

 IN WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	OFFICERS
	
	 /s/ Kerrick S. Knauth

	Name: Kerrick S. Knauth
	Address:	 	  

		 	  

 [Signature Page to Sponsor Letter Agreement] 

 IN WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	INSIDERS
	
	 /s/ Arno Harris

	Name: Arno Harris
	Address:	 	  

		 	  

 [Signature Page to Sponsor Letter Agreement] 

 IN WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	INSIDERS
	
	 /s/ Audrey Lee

	Name: Audrey Lee
	Address:	 	  

		 	  

 [Signature Page to Sponsor Letter Agreement] 

 IN WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	INSIDERS
	
	 /s/ Brian Goncher

	Name: Brian Goncher
	Address:	 	  

		 	  

 [Signature Page to Sponsor Letter Agreement] 

 IN WITNESS WHEREOF, the Parties have executed and delivered this Agreement as of the date
first above written. 
  

			
	INSIDERS
	
	 /s/ Steven Berkenfeld

	Name: Steven Berkenfeld
	Address:	 	  

		 	  

 [Signature Page to Sponsor Letter Agreement] 

 EXHIBIT A 

Subject Securities 

 EXHIBIT A 

Subject Securities 
  

									
	 Shareholders
	  	Pre-Closing ACT Class B
Shares	 	  	Pre-Closing ACT Warrants	 
	 ArcLight CTC Holdings II, L.P.
	  	 	6,920,326	 	  	 	9,223,261	 
	 Arno Harris
	  	 	35,000	 	  	 	—  	 
	 Audrey Lee
	  	 	35,000	 	  	 	—  	 
	 Brian Goncher
	  	 	35,000	 	  	 	—  	 
	 Steven Berkenfeld
	  	 	35,000	 	  	 	—  	 
		  	  
	  
	 	  	  
	  
	 
	 Total
	  	 	7,779,076	 	  	 	9,223,261	 
		  	  
	  
	 	  	  
	  
	 

 [Exhibit A to Sponsor Letter Agreement]EX-10.3

 Exhibit 10.3 

INVESTOR RIGHTS AGREEMENT 

THIS INVESTOR RIGHTS AGREEMENT (as it may be amended, supplemented or restated from time to time in accordance with the terms of this Investor
Rights Agreement, the “Investor Rights Agreement”), dated as of [•], 2022 (the “Effective Date”), is made by and among (i) Opal Fuels Inc., a Delaware corporation (formerly known as ArcLight Clean
Transition Corp. II, an exempted company incorporated in the Cayman Islands with limited liability) (“PubCo”); (ii) each of the parties listed as a “Seller” on the signature pages attached hereto (each, a
“Seller” and, collectively, the “Sellers”); (iii) ArcLight CTC Holdings II, L.P., a Delaware limited partnership (the “Sponsor”); and (iv) solely for purposes of Article I,
Section 2.11, Section 2.15, Section 2.16(a), Section 3.3 and Article IV (A) Arno Harris,
(B) Dr. Ja-Chin Audrey Lee, (C) Brian Goncher and (D) Steven Berkenfeld (each, a “Sponsor Principal” and, collectively, the “Sponsor Principals” and,
together with the Sponsor, the “Founder Holders” and, each, a “Founder Holder”). Each of PubCo, the Sellers and each Founder Holder may be referred to herein as a “Party” and collectively as the
“Parties”. Capitalized terms used but not otherwise defined herein shall have the respective meanings set forth in the BCA (as defined below). 

RECITALS 
 WHEREAS,
PubCo has entered into that certain Business Combination Agreement, dated as of December 2, 2021, by and among PubCo, Opal Fuels LLC, a Delaware limited liability company (the “Operating Company”), and Opal HoldCo LLC, a
Delaware limited liability company (“Opal HoldCo”) (as may be amended, restated, amended and restated, modified or supplemented from time to time in accordance with the terms of such agreement, the “BCA”), in
connection with the business combination (the “Business Combination”) set forth in the BCA; 
 WHEREAS, pursuant to the
BCA, at the Closing, (i) PubCo has contributed the Closing Date Contribution Amount and the Closing Date Equity Contribution to the Operating Company (collectively, the “Contribution”) and, in exchange therefor, the Operating
Company has issued to PubCo a number of Class A Units (as defined below) determined pursuant to the BCA and (ii) in connection with the Contribution and issuance described above, the Post-Closing Company Members have entered into that
certain Second Amended and Restated Limited Liability Company Agreement of the Operating Company (the “Opco LLC Agreement”), to, among other things, recapitalize the Pre-Closing Company Units
such that, from and after the Closing, the Equity Securities (as defined below) of the Operating Company consist of the Opal Units (as defined below), with the applicable rights, preferences and obligations set forth in the Opco LLC Agreement; 

WHEREAS, each of the Sellers has the right to exchange its respective Class B Units (as defined below), and cancel an equal number of its
respective (i) shares of Class B Common Stock (as defined below) for shares of Class A Common Stock (as defined below) or (ii) shares of Class D Common Stock (as defined below) for shares of Class C Common Stock (as
defined below), in each case, in the manner set forth in, and pursuant to the terms and conditions of, the Opco LLC Agreement; 
 WHEREAS,
each of the Earnout Participants has the right to exchange its respective Class B Units that will be earned by such Earnout Participant pursuant to the BCA upon satisfaction of the conditions set forth in the BCA, and cancel an equal number of
shares of Class B Common Stock and Class D Common Stock, as applicable, for shares of Class A Common Stock (collectively, the “Exchanged Earnout Shares”) in the manner set forth in, and pursuant to the terms and
conditions of, the Opco LLC Agreement; 

  
 -1- 

 WHEREAS, PubCo, the Sponsor and the Sponsor Principals entered into that
certain Registration and Shareholder Rights Agreement, dated as of March 25, 2021 (the “Original RRA”); 
 WHEREAS, in
connection with the execution of this Investor Rights Agreement, PubCo, the Sponsor and the Sponsor Principals desire to terminate the Original RRA and replace it with this Investor Rights Agreement; and 

WHEREAS, on the Effective Date, the Parties desire to set forth their agreement with respect to registration rights and certain other matters,
in each case, in accordance with the terms and conditions of this Investor Rights Agreement. 
 NOW, THEREFORE, in consideration of the
mutual covenants and agreements contained in this Investor Rights Agreement, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound, the Parties hereby agree as
follows: 
 ARTICLE I 

DEFINITIONS 

Section 1.1 Definitions. As used in this Investor Rights Agreement, the following terms shall have the following meanings: 

“Adverse Disclosure” means any public disclosure of material non-public information,
which disclosure, in the good faith determination of the Board, after consultation with counsel to PubCo, (a) would be required to be made in any Registration Statement or Prospectus in order for the applicable Registration Statement or
Prospectus not to contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements contained therein (in the case of any Prospectus and any preliminary Prospectus, in the light of the circumstances
under which they were made) not misleading, (b) would not be required to be made at such time if the Registration Statement were not being filed, and (c) PubCo has a bona fide business purpose for not making such information public.

 “Affiliate” of any particular Person means any other Person controlling, controlled by or under common control with such
Person, where “control” means the possession, directly or indirectly, of the power to direct the management and policies of a Person whether through the ownership of voting securities, its capacity as a sole or managing member or
otherwise; provided that no Party shall be deemed an Affiliate of PubCo or any of its Subsidiaries for purposes of this Investor Rights Agreement. 

“Automatic Shelf Registration Statement” has the meaning set forth in Rule 405 promulgated by the SEC pursuant to the
Securities Act. 

  
 -2- 

 “BCA” has the meaning set forth in the Recitals. 

“Beneficially Own” has the meaning set forth in Rule 13d-3 promulgated under the
Exchange Act. 
 “Board” means the board of directors of PubCo. 

“Business Day” means a day, other than a Saturday or Sunday, on which commercial banks in New York, New York are open for the
general transaction of business. 
 “Business Combination” has the meaning set forth in the Recitals. 

“Bylaws” means the “Post-Closing ACT Bylaws” as defined in the BCA, as the same may be amended or amended and
restated from time to time. 
 “Certificate of Incorporation” means the “Post-Closing ACT Certificate of
Incorporation” as defined in the BCA, as the same may be amended or amended and restated from time to time. 

“Class A Common Stock” means the shares of Class A common stock, par value $0.0001 per share, of
PubCo, including (a) any shares of such Class A common stock issuable upon the exercise of any warrant or other right to acquire shares of such Class A common stock and (b) any Equity Securities of PubCo that are issued or
distributed or may be issuable with respect to such Class A common stock by way of conversion, dividend, stock split or other distribution, consolidation, merger, exchange, reclassification, recapitalization or other similar transaction. 

“Class A Units” means the “Class A Units” as defined in the Opco LLC Agreement. 

“Class B Common Stock” means the shares of Class B common stock, par value $0.0001 per share, of
PubCo, including (a) any shares of such Class B common stock issuable upon the exercise of any warrant or other right to acquire shares of such Class B common stock and (b) any Equity Securities of PubCo that are issued or
distributed or may be issuable with respect to such Class B common stock by way of conversion, dividend, stock split or other distribution, consolidation, merger, exchange, reclassification, recapitalization or other similar transaction. 

“Class B Units” means the “Class B Units” as defined in the Opco LLC Agreement. 

“Class C Common Stock” means the shares of Class C common stock, par value $0.0001 per share, of
PubCo, including (a) any shares of such Class C common stock issuable upon the exercise of any warrant or other right to acquire shares of such Class C common stock and (b) any Equity Securities of PubCo that are issued or
distributed or may be issuable with respect to such Class C common stock by way of conversion, dividend, stock split or other distribution, consolidation, merger, exchange, reclassification, recapitalization or other similar transaction. 

“Class D Common Stock” means the shares of Class D common stock, par value $0.0001 per share, of
PubCo, including (a) any shares of such Class D common stock issuable upon the exercise of any warrant or other right to acquire shares of such Class D common stock and (b) any Equity Securities of PubCo that are issued or
distributed or may be issuable with respect to such Class D common stock by way of conversion, dividend, stock split or other distribution, consolidation, merger, exchange, reclassification, recapitalization or other similar transaction. 

  
 -3- 

 “Common Stock” means shares of the Class A Common Stock, the
Class B Common Stock, the Class C Common Stock and the Class D Common Stock, including any shares of the Class A Common Stock, the Class B Common Stock, the Class C Common Stock and the Class D Common Stock
issuable upon the exercise of any warrant or other right to acquire shares of the Class A Common Stock, the Class B Common Stock, the Class C Common Stock and the Class D Common Stock. 

“Confidential Information” means confidential, non-public information about PubCo and
its Subsidiaries. 
 “Contribution” has the meaning set forth in the Recitals. 

“Controlled Entity” means, as to any Person, (a) any corporation more than fifty percent (50%) of the outstanding voting
stock of which is owned by such Person or such Person’s Family Members or Affiliates, (b) any trust, whether or not revocable, of which such Person or such Person’s Family Members or Affiliates are the sole beneficiaries, (c) any
partnership of which such Person or an Affiliate of such Person is the managing partner or in which such Person or such Person’s Family Members or Affiliates hold partnership interests representing at least fifty percent (50%) of such
partnership’s capital and profits and (d) any limited liability company of which such Person or an Affiliate of such Person is the manager or managing member or in which such Person or such Person’s Family Members or Affiliates hold
membership interests representing at least fifty percent (50%) of such limited liability company’s capital and profits. 

“Demanding Holders” has the meaning set forth in Section 2.1(c). 

“Effective Date” has the meaning set forth in the Preamble. 

“Equity Securities” means any share, share capital, capital stock, partnership, membership, joint venture or similar interest
in any Person (including any stock appreciation, phantom stock, restricted stock, restricted stock unit, performance share, profit participation or similar rights), and any option, warrant, right or security (including debt securities) convertible,
exchangeable or exercisable therefor. 
 “Exchange Act” means the Securities Exchange Act of 1934, as amended, and any
successor thereto, as the same shall be in effect from time to time. 
 “Exchanged Earnout Shares” has the meaning set
forth in the Recitals. 
 “Family Member” means, with respect to any Person, such Person’s spouse, ancestors,
descendants (whether by blood, marriage or adoption) or spouse of a descendant of such Person, brothers and sisters (whether by blood, marriage or adoption) and inter vivos or testamentary trusts of which only such Person and his or her spouse,
ancestors, descendants (whether by blood, marriage or adoption), brothers and sisters (whether by blood, marriage or adoption) are beneficiaries. 

  
 -4- 

 “FINRA” means the Financial Industry Regulatory Authority, Inc. 

“Form S-1 Shelf” has the meaning set forth in
Section 2.1(a). 
 “Form S-3 Shelf” has the meaning set
forth in Section 2.1(a). 
 “Founder Holder” has the meaning set forth in the Preamble. 

“Holder” means any holder of Registrable Securities who is a Party to, or who succeeds to rights under, this Investor Rights
Agreement pursuant to Section 4.1. 
 “Holder Information” has the meaning set forth in
Section 2.10(b). 
 “Investor Rights Agreement” has the meaning set forth in the Preamble. 

“Lock-Up Period” has the meaning set forth in
Section 3.1(a). 
 “Lock-Up Shares” has the meaning set
forth in Section 3.1(a). 
 “Maximum Number of Securities” has the meaning set forth in
Section 2.1(d). 
 “Minimum Takedown Threshold” has the meaning set forth in
Section 2.1(c). 
 “Misstatement” means an untrue statement of a material fact or an omission to
state a material fact required to be stated in a Registration Statement or Prospectus, or necessary to make the statements in a Registration Statement or Prospectus, in the light of the circumstances under which they were made, not misleading. 

“Necessary Action” means, with respect to any Party and a specified result, all actions (to the extent such actions are not
prohibited by applicable Law and within such Party’s control, and in the case of any action that requires a vote or other action on the part of the Board to the extent such action is consistent with fiduciary duties that PubCo’s directors
may have in such capacity) necessary to cause such result, including (a) calling special meetings of stockholders, (b) voting or providing a written consent or proxy, if applicable in each case, with respect to shares of Common Stock,
(c) causing the adoption of stockholders’ resolutions and amendments to the Organizational Documents, (d) executing agreements and instruments, (e) making, or causing to be made, with Governmental Entities, all filings,
registrations or similar actions that are required to achieve such result, and (f) nominating certain Persons for election to the Board in connection with the annual or special meeting of stockholders of PubCo. 

“NextEra Subscription Agreement” that certain Subscription Agreement, dated as of November 29, 2021, by and between
Operating Company and Mendocino Capital, LLC, a Delaware limited liability company. 
 “Opal HoldCo” has the meaning set
forth in the Recitals. 
 “Opal Units” means, collectively, the Class A Units and the Class B Units. 

“Opco LLC Agreement” has the meaning set forth in the Recitals. 

  
 -5- 

 “Operating Company” has the meaning set forth in the Recitals. 

“Organizational Documents” means the Certificate of Incorporation and the Bylaws. 

“Original RRA” has the meaning set forth in the Recitals. 

“Party” has the meaning set forth in the Preamble. 

“Permitted Transferee” means with respect to any Person, (a) any Family Member of such Person, (b) any Affiliate of
such Person, (c) any Affiliate of any Family Member of such Person (excluding any Affiliate under this clause (c) who operates or engages in a business which competes with the business of PubCo or the Operating Company or any of
their respective Subsidiaries), (d) with respect to any Founder Holder, any officer, director, employee, partner, shareholder, member or other equity holder of such Founder Holder or its Affiliates and (e) any Controlled Entity of such Person.

 “Piggyback Registration” has the meaning set forth in Section 2.2(a). 

“Prospectus” means the prospectus included in any Registration Statement, all amendments (including post-effective
amendments) and supplements to such prospectus, and all material incorporated by reference in such prospectus. 
 “PubCo”
has the meaning set forth in the Preamble. 
 “Registrable Securities” means at any time (a) any shares of
Class A Common Stock (including, without limitation, Class A Common Stock (i) issuable pursuant to the Certificate of Incorporation and the Opco LLC Agreement upon an exchange of Class B Units and the corresponding cancellation
of an equal number of shares of Class B Common Stock in exchange for shares of Class A Common Stock, (ii) that comprise Exchanged Earnout Shares (whether or not earned as of such date), (iii) issuable upon conversion or exchange
of shares of Class C Common Stock, (iv) any shares of Class A Common Stock issued pursuant to the BCA or (v) held by the Founder Holders or Sellers), and (b) any Equity Securities of PubCo or any Subsidiary of PubCo that may
be issued or distributed or be issuable with respect to the securities referred to in clauses (a) by way of conversion, dividend, stock split or other distribution, merger, consolidation, exchange, recapitalization or
reclassification or similar transaction, in each case held by a Holder, other than any security received pursuant to an incentive plan adopted by PubCo on or after the Closing Date; provided, however, that any such Registrable
Securities shall cease to be Registrable Securities to the extent (A) a Registration Statement with respect to the sale of such Registrable Securities has become effective under the Securities Act and such Registrable Securities have been sold,
transferred, disposed of or exchanged in accordance with the plan of distribution set forth in such Registration Statement, (B) such Registrable Securities shall have ceased to be outstanding, (C) such Registrable Securities have been sold
to, or through, a broker, dealer or underwriter in a public distribution or other public securities transaction, (D) such Registrable Security is disposed of under SEC Rule 144 under the Securities Act or any other public sale pursuant to an
exemption from the registration requirements of the Securities Act as a result of which the legend on any certificate or book-entry notation representing such Registrable Security restricting transfer of such Registrable Security has been removed or
(E) for purposes of Article II, the Holder thereof, together with its, his or her Permitted Transferees, Beneficially Owns less than one percent (1%) 

  
 -6- 

 
of the shares of Class A Common Stock that are outstanding at such time. For purposes of this Agreement, a Person shall be deemed to be a holder of shares of Class A Common Stock and
such shares of Class A Common Stock shall be deemed to be in existence whenever such Person has the right to acquire such shares of Class A Common Stock (upon conversion, exchange or exercise in connection with a transfer of securities or
otherwise, but disregarding any restrictions or limitations upon the exercise of such right other than vesting), whether or not such acquisition has actually been effected, and such Person shall be entitled to exercise the rights of a holder of
shares of Class A Common Stock. 
 “Registration” means a registration, including any related Shelf Takedown, effected
by preparing and filing a registration statement, prospectus or similar document in compliance with the requirements of the Securities Act, and such registration statement becoming effective. 

“Registration Expenses” means the expenses of a Registration or other Transfer pursuant to the terms of this Investor Rights
Agreement, including the following: 
 (a) all SEC or securities exchange registration and filing fees (including fees with respect to
filings required to be made with FINRA); 
 (b) all fees and expenses of compliance with securities or blue sky Laws (including fees and
disbursements of counsel for the Underwriters in connection with blue sky qualifications of Registrable Securities); 
 (c) all printing,
messenger, telephone and delivery expenses; 
 (d) all fees and disbursements of counsel for PubCo; 

(e) all fees and disbursements of all independent registered public accountants of PubCo incurred in connection with such Registration or
Transfer, including the expenses of any special audits and/or comfort letters required or incident to such performance and compliance; 
 (f)
reasonable out-of-pocket fees and expenses of one (1) legal counsel selected by the
majority-in-interest of the Holders participating in such Registration or Transfer; and 

(g) the costs and expenses of PubCo relating to analyst and investor presentations or any “road show” undertaken in connection with
the Registration and/or marketing of the Registrable Securities (including the expenses of the Holders). 
 “Registration
Statement” means any registration statement that covers the Registrable Securities pursuant to the provisions of this Investor Rights Agreement, including the Prospectus included in such registration statement, amendments (including
post-effective amendments) and supplements to such registration statement, and all exhibits to and all material incorporated by reference in such registration statement. 

“Representatives” means, with respect to any Person, any of such Person’s officers, directors, managers, members,
equityholders, employees, agents, attorneys, accountants, actuaries, consultants, financial advisors or other Person acting on behalf of such Person. 

  
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 “Requesting Holder” means any Holder requesting piggyback rights pursuant
to Section 2.2 with respect to an Underwritten Shelf Takedown. 
 “SEC” means the United States
Securities and Exchange Commission. 
 “SEC Rule 144” means Rule 144 promulgated by the SEC under the Securities Act. 

“SEC Rule 145” means Rule 145 promulgated by the SEC under the Securities Act. 

“Securities Act” means the Securities Act of 1933, as amended, and any successor thereto, as the same shall be in effect from
time to time. 
 “Sellers” has the meaning set forth in the Preamble. 

“Shelf” has the meaning set forth in Section 2.1(a). 

“Shelf Registration” means a registration of securities pursuant to a Registration Statement filed with the SEC in accordance
with and pursuant to Rule 415 promulgated under the Securities Act. 
 “Shelf Takedown” means an Underwritten Shelf
Takedown or any proposed transfer or sale using a Registration Statement, including a Piggyback Registration. 
 “Sponsor”
has the meaning set forth in the Preamble. 
 “Sponsor Letter” means that certain Letter Agreement, dated as of
March 25, 2021, by and among PubCo, the Founder Holders and the other parties thereto. 
 “Sponsor Members” has the
meaning set forth in Section 2.16(a). 
 “Sponsor Principal” has the meaning set forth in the
Preamble. 
 “Subsequent Shelf Registration” has the meaning set forth in Section 2.1(b). 

“Transfer” means, when used as a noun, any voluntary or involuntary transfer, sale, pledge or hypothecation or other
disposition by the Transferor (whether by operation of law or otherwise) and, when used as a verb, the Transferor voluntarily or involuntarily transfers, sells, pledges or hypothecates or otherwise disposes of (whether by operation of law or
otherwise), including, in each case, (a) the establishment or increase of a put equivalent position or liquidation with respect to, or decrease of a call equivalent position within the meaning of Section 16 of the Exchange Act with respect
to, any security or (b) entry into any swap or other arrangement that transfers to another Person, in whole or in part, any of the economic consequences of ownership of any security, whether any such transaction is to be settled by delivery of
such securities, in cash or otherwise. The terms “Transferee,” “Transferor,” “Transferred,” and other forms of the word “Transfer” shall have the correlative meanings. 

“Underwriter” means any investment banker(s) and manager(s) appointed to administer the offering of any Registrable
Securities as principal in an Underwritten Offering. 

  
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 “Underwritten Offering” means a Registration in which Equity Securities of
PubCo are sold to an Underwriter for distribution to the public. 
 “Underwritten Shelf Takedown” has the meaning set forth
in Section 2.1(c). 
 “Well-Known Seasoned Issuer” has the meaning set forth in Rule 405
promulgated by the SEC pursuant to the Securities Act. 
 “Warrants” means the outstanding warrants, each exercisable into
one (1) share of Class A Common Stock, to purchase an aggregate of 9,223,261 shares of Class A Common Stock, which were issued to the Sponsor pursuant to that certain Private Placement Warrant Purchase Agreement, dated March 25,
2021, by and among the Sponsor and PubCo. 
 “Withdrawal Notice” has the meaning set forth in
Section 2.1(e). 
 Section 1.2 Interpretive Provisions. For all purposes of this Investor Rights
Agreement, except as otherwise provided in this Investor Rights Agreement or unless the context otherwise requires: 
 (a) the singular shall
include the plural, and the plural shall include the singular, unless the context clearly prohibits that construction; 
 (b) the words
“hereof,” “herein,” “hereunder” and words of similar import, when used in this Investor Rights Agreement, refer to this Investor Rights Agreement as a whole and not to any particular provision of this Investor Rights
Agreement; 
 (c) references in this Investor Rights Agreement to any Law shall be deemed also to refer to such Law, and all rules and
regulations promulgated thereunder; 
 (d) whenever the words “include,” “includes” or “including” are used in
this Investor Rights Agreement, they shall mean “without limitation;” 
 (e) the captions and headings of this Investor Rights
Agreement are for convenience of reference only and shall not affect the interpretation of this Investor Rights Agreement; 
 (f) pronouns of
any gender or neuter shall include, as appropriate, the other pronoun forms; 
 (g) the word “or” shall be construed to mean
“and/or” and the words “neither,” “nor,” “any,” “either” and “or” shall not be exclusive, unless the context clearly prohibits that construction; and 

(h) the phrase “to the extent” shall be construed to mean “the degree by which.” 

  
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 ARTICLE II 

REGISTRATION RIGHTS 

Section 2.1 Shelf Registration. 

(a) Filing. PubCo shall file, within 20 days of the Closing Date or such other earlier date as it is required in accordance with any
PIPE Subscription Agreement, a Registration Statement for a Shelf Registration on Form S-3 (the “Form S-3 Shelf”), or if PubCo is ineligible to use a
Form S-3 Shelf, a Registration Statement for a Shelf Registration on Form S-1 (the “Form S-1 Shelf” and,
together with the Form S-3 Shelf (and any Subsequent Shelf Registration), the “Shelf”), in each case, covering the resale of all Registrable Securities (determined as of two (2) Business
Days prior to such filing) on a delayed or continuous basis. PubCo shall use its commercially reasonable efforts to cause the Shelf to become effective as soon as practicable after such filing, but in no event later than sixty (60) days after
the initial filing thereof (or ninety (90) days after the initial filing thereof if the SEC notifies PubCo that it will “review” the Shelf) or such other earlier date as it is required in accordance with any PIPE Subscription
Agreement. The Shelf shall provide for the resale of the Registrable Securities included therein pursuant to any method or combination of methods legally available to, and requested by, any Holder. PubCo shall maintain the Shelf in accordance with
the terms of this Investor Rights Agreement, and shall prepare and file with the SEC such amendments, including post-effective amendments, and supplements as may be necessary to keep such Shelf continuously effective, available for use and in
compliance with the provisions of the Securities Act until such time as there are no longer any Registrable Securities. In the event PubCo files a Form S-1 Shelf, PubCo shall use its commercially reasonable
efforts to convert the Form S-1 Shelf (and any Subsequent Shelf Registration) to a Form S-3 Shelf as soon as practicable after PubCo is eligible to use Form S-3. 
 (b) Subsequent Shelf Registration. If any Shelf ceases to be effective under the Securities
Act for any reason at any time while there are any Registrable Securities outstanding, PubCo shall use its commercially reasonable efforts to as promptly as is reasonably practicable cause such Shelf to again become effective under the Securities
Act (including obtaining the prompt withdrawal of any order suspending the effectiveness of such Shelf), and shall use its commercially reasonable efforts to as promptly as is reasonably practicable amend such Shelf in a manner reasonably expected
to result in the withdrawal of any order suspending the effectiveness of such Shelf or file an additional Registration Statement as a Shelf Registration (a “Subsequent Shelf Registration”) registering the resale of all outstanding
Registrable Securities from time to time, and pursuant to any method or combination of methods legally available to, and requested by, any Holder. If a Subsequent Shelf Registration is filed, PubCo shall use its commercially reasonable efforts to
(i) cause such Subsequent Shelf Registration to become effective under the Securities Act as promptly as is reasonably practicable after the filing thereof (it being agreed that the Subsequent Shelf Registration shall be an Automatic Shelf
Registration Statement if PubCo is a Well-Known Seasoned Issuer) and (ii) keep such Subsequent Shelf Registration continuously effective, available for use and in compliance with the provisions of the Securities Act until such time as there are
no longer any Registrable Securities outstanding. Any such Subsequent Shelf Registration shall be on Form S-3 to the extent that PubCo is eligible to use such form. Otherwise, such Subsequent Shelf
Registration shall be on another appropriate form. In the event that any Holder holds Registrable Securities that are not registered for resale on a delayed or continuous basis, PubCo, upon request of a Holder, shall promptly use its

  
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commercially reasonable efforts to cause the resale of such Registrable Securities to be covered by either, at PubCo’s option, the Shelf (including by means of a post-effective amendment) or
a Subsequent Shelf Registration and cause the same to become effective as soon as practicable after such filing and such Shelf or Subsequent Shelf Registration shall be subject to the terms of this Investor Rights Agreement. 

(c) Requests for Underwritten Shelf Takedowns. At any time and from time to time after the Shelf has been declared effective by the SEC,
the Holders, may request to sell all or any portion of their Registrable Securities in an Underwritten Offering that is registered pursuant to the Shelf (each, an “Underwritten Shelf Takedown”); provided that PubCo shall only
be obligated to effect an Underwritten Shelf Takedown if such offering (i) shall include securities with a total offering price (including piggyback securities and before deduction of underwriting discounts) reasonably expected to exceed, in
the aggregate, $25,000,000 (the “Minimum Takedown Threshold”) or (ii) shall be made with respect to all of the Registrable Securities of the Demanding Holder. All requests for Underwritten Shelf Takedowns shall be made by
giving written notice to PubCo, which shall specify the approximate number of Registrable Securities proposed to be sold in the Underwritten Shelf Takedown and the expected price range (net of underwriting discounts and commissions) of such
Underwritten Shelf Takedown; provided that each Holder agrees that the fact that such a notice has been delivered shall constitute Confidential Information subject to Section 4.14. The Holders that requested such
Underwritten Shelf Takedown (the “Demanding Holders”) holding a majority in interest of the Registrable Securities to be registered pursuant to such Underwritten Shelf Takedown shall have the right to select the Underwriters for
such offering (which shall consist of one (1) or more reputable nationally or regionally recognized investment banks), and to agree to the pricing and other terms of such offering; provided that such selection shall be subject to the
consent of PubCo, which consent shall not be unreasonably withheld, conditioned or delayed. Notwithstanding anything to the contrary contained in this Investor Rights Agreement, in no event shall any Holder or any Transferee thereof request an
Underwritten Shelf Takedown during the Lock-Up Period applicable to such Person. No Holder may request any Underwritten Shelf Takedown more than two (2) times in any twelve (12) month period, subject
to the proviso in the first sentence of this Section 2.1(c). 
 (d) Reduction of Underwritten Shelf
Takedowns. If the managing Underwriter or Underwriters in an Underwritten Shelf Takedown, in good faith, advise PubCo, the Demanding Holders and the Requesting Holders (if any) in writing that the dollar amount or number of Registrable
Securities that the Demanding Holders and the Requesting Holders (if any) desire to sell, taken together with all other shares of Common Stock or other Equity Securities that PubCo desires to sell and all other shares of Common Stock or other Equity
Securities, if any, that have been requested to be sold in such Underwritten Offering pursuant to separate written contractual piggyback registration rights held by any other stockholders of PubCo, exceeds the maximum dollar amount or maximum number
of Equity Securities that can be sold in such Underwritten Offering without adversely affecting the proposed offering price, the timing, the distribution method or the probability of success of such Underwritten Offering (such maximum dollar amount
or maximum number of such Equity Securities, as applicable, the “Maximum Number of Securities”), then PubCo shall include in such Underwritten Offering, as follows: at all times (i) first, the Registrable Securities of the
Demanding Holders and the Requesting Holders (if any) (pro rata based on the respective number of Registrable Securities that each Demanding Holder 

  
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and Requesting Holder (if any) has requested be included in such Underwritten Shelf Takedown) that can be sold without exceeding the Maximum Number of Securities; (ii) second, to the extent
that the Maximum Number of Securities has not been reached under the foregoing clause (i), the shares of Common Stock or other Equity Securities that PubCo desires to sell, which can be sold without exceeding the Maximum Number of Securities;
(iii) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (i) and (ii), the shares of Common Stock or other Equity Securities of other Persons that PubCo is obligated to
include in such Underwritten Offering pursuant to separate written contractual arrangements with such Persons and that can be sold without exceeding the Maximum Number of Securities. 

(e) Withdrawal. Any of the Demanding Holders initiating an Underwritten Shelf Takedown shall have the right to withdraw from such
Underwritten Shelf Takedown for any or no reason whatsoever upon written notification (a “Withdrawal Notice”) to PubCo and the Underwriter or Underwriters (if any) of such Demanding Holder’s intention to withdraw from such
Underwritten Shelf Takedown, prior to the public announcement of the Underwritten Shelf Takedown by PubCo; provided that a Holder not so withdrawing may elect to have PubCo continue such Underwritten Shelf Takedown if the Minimum Takedown
Threshold would still be satisfied or if such Underwritten Shelf Takedown would be made with respect to all of the Registrable Securities of such Holder. Following the receipt of any Withdrawal Notice, PubCo shall promptly forward such Withdrawal
Notice to any other Holders that had elected to participate in such Underwritten Shelf Takedown. Notwithstanding anything to the contrary contained in this Investor Rights Agreement, PubCo shall be responsible for the Registration Expenses
incurred in connection with an Underwritten Shelf Takedown prior to delivery of a Withdrawal Notice under this Section 2.1(e). 

(f) Long-Form Demands. Upon the expiration of the Lock-Up Period applicable to such Person, and
during such times as no Shelf is effective, each Holder may demand that PubCo file a Registration Statement on Form S-1 for the purpose of conducting an Underwritten Offering of any or all of such
Holder’s Registrable Securities. PubCo shall file such Registration Statement within 30 days of receipt of such demand and use its commercially reasonable efforts to cause the same to be declared effective within 60 days of filing. The
provisions of Section 2.1(c), Section 2.1(d) and Section 2.1(e) shall apply to this Section 2.1(f) as if a demand under this
Section 2.1(f) were an Underwritten Shelf Takedown; provided that in order to withdraw a demand under this Section 2.1(f), such withdrawal must be received by PubCo prior to PubCo having
publicly filed a Registration Statement pursuant to this Section 2.1(f). 
 Section 2.2 Piggyback
Registration. 
 (a) Piggyback Rights. If PubCo or any Holder proposes to conduct a registered offering of, or if PubCo proposes
to file a Registration Statement under the Securities Act with respect to an offering of, Equity Securities of PubCo or securities or other obligations exercisable or exchangeable for or convertible into Equity Securities of PubCo, for its own
account or for the account of stockholders of PubCo (or by PubCo and by the stockholders of PubCo, including an Underwritten Shelf Takedown pursuant to Section 2.1), other than a Registration Statement (or any registered
offering with respect thereto) (i) filed in connection with any employee stock option or other benefit plan or SEC Rule 145 transaction, (ii) for an exchange offer or offering of 

  
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securities solely to PubCo’s existing stockholders, (iii) for an offering of debt that is convertible into Equity Securities of PubCo or (iv) for a dividend reinvestment plan, then
PubCo shall give written notice of such proposed offering to all Holders as soon as practicable but not less than four (4) calendar days before the anticipated filing date of such Registration Statement or, in the case of an underwritten
offering pursuant to a Shelf Registration, the launch date of such offering, which notice shall (A) describe the amount and type of securities to be included in such offering, the intended method(s) of distribution, and the name of the proposed
managing Underwriter or Underwriters, if any and if known, in such offering, and (B) offer to all of the Holders the opportunity to include in such registered offering such number of Registrable Securities as such Holders may request in writing
within three (3) calendar day after receipt of such written notice (such registered offering, a “Piggyback Registration”); provided that each Holder agrees that the fact that such a notice has been delivered shall
constitute Confidential Information subject to Section 4.14. PubCo shall cause such Registrable Securities to be included in such Piggyback Registration and shall use its commercially reasonable efforts to cause the
managing Underwriter or Underwriters of a proposed Underwritten Offering to permit the Registrable Securities requested by the Holders pursuant to this Section 2.2(a) to be included in a Piggyback Registration on the same
terms and conditions as any similar securities of PubCo included in such registered offering and to permit the sale or other disposition of such Registrable Securities in accordance with the intended method(s) of distribution thereof. The inclusion
of any Holder’s Registrable Securities in a Piggyback Registration shall be subject to such Holder’s agreement to abide by the terms of Section 2.6. 

(b) Reduction of Piggyback Registration. If the managing Underwriter or Underwriters in an Underwritten Offering that is to be a
Piggyback Registration (other than an Underwritten Shelf Takedown), in good faith, advises PubCo and the Holders participating in the Piggyback Registration in writing that the dollar amount or number of shares of Common Stock or other Equity
Securities that PubCo desires to sell, taken together with (i) the shares of Common Stock or other Equity Securities, if any, as to which Registration or a registered offering has been demanded pursuant to separate written contractual
arrangements with Persons other than the Holders hereunder and (ii) the shares of Common Stock or other Equity Securities, if any, as to which registration has been requested pursuant to Section 2.2, exceeds the
Maximum Number of Securities, then: 
 (i) if the Registration is initiated and undertaken for PubCo’s account, PubCo shall include in
any such Registration (A) first, the shares of Common Stock or other Equity Securities that PubCo desires to sell, which can be sold without exceeding the Maximum Number of Securities, (B) second, to the extent that the Maximum Number of
Securities has not been reached under the foregoing clause (A), the Registrable Securities of Holders exercising their rights to register their Registrable Securities pursuant to Section 2.2(a) (pro rata based on the
respective number of Registrable Securities that each Holder has requested be included in such Registration), which can be sold without exceeding the Maximum Number of Securities and (C) third, to the extent that the Maximum Number of
Securities has not been reached under the foregoing clauses (A) and (B), the shares of Common Stock or other Equity Securities, if any, as to which Registration has been requested pursuant to written contractual piggyback
registration rights of other stockholders of PubCo, which can be sold without exceeding the Maximum Number of Securities; or 

  
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 (ii) if the Registration is pursuant to a request by Persons other than the Holders, then
PubCo shall include in any such Registration (A) first, the shares of Common Stock or other Equity Securities, if any, of such requesting Persons, other than the Holders, which can be sold without exceeding the Maximum Number of Securities,
(B) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (A), the Registrable Securities of Holders exercising their rights to register their Registrable Securities pursuant to
Section 2.2(a) (pro rata based on the respective number of Registrable Securities that each Holder has requested be included in such Registration), which can be sold without exceeding the Maximum Number of Securities,
(C) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A) and (B), the shares of Common Stock or other Equity Securities that PubCo desires to sell, which can be sold
without exceeding the Maximum Number of Securities and (D) fourth, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A), (B) and (C), the shares of Common Stock or other
Equity Securities, if any, for the account of other Persons that PubCo is obligated to register pursuant to separate written contractual piggyback registration rights of such Persons, which can be sold without exceeding the Maximum Number of
Securities. 
 Notwithstanding anything to the contrary in this Section 2.2(b), in the event a Demanding Holder
has submitted notice for a bona fide Underwritten Shelf Takedown and all sales pursuant to such Underwritten Shelf Takedown pursuant to Section 2.1 have not been effected in accordance with the applicable plan of
distribution or submitted a Withdrawal Notice prior to such time that PubCo has given written notice of a Piggyback Registration to all Holders pursuant to Section 2.2, then any reduction in the number of Registrable
Securities to be offered in such offering shall be determined in accordance with Section 2.1(d), instead of this Section 2.2(b). 

(c) Piggyback Registration Withdrawal. Any Holder shall have the right to withdraw from a Piggyback Registration for any or no reason
whatsoever upon written notification to PubCo and the Underwriter or Underwriters (if any) of such Holder’s intention to withdraw from such Piggyback Registration prior to the effectiveness of the Registration Statement filed with the SEC with
respect to such Piggyback Registration or, in the case of a Piggyback Registration pursuant to a Shelf Registration, the filing of the applicable “red herring” prospectus or prospectus supplement with respect to such Piggyback Registration
used for marketing such transaction. PubCo (whether on its own good faith determination or as the result of a request for withdrawal by Persons pursuant to separate written contractual obligations) may withdraw a Registration Statement filed with
the SEC in connection with a Piggyback Registration (which, in no circumstance, shall include the Shelf) at any time prior to the effectiveness of such Registration Statement. Notwithstanding anything to the contrary set forth in this Investor
Rights Agreement, PubCo shall be responsible for the Registration Expenses incurred in connection with a Piggyback Registration prior to its withdrawal under this Section 2.2(c). 

(d) Notwithstanding anything herein to the contrary, this Section 2.2 shall not apply (i) for any Holder or
Party, prior to the expiration of the Lock-Up Period in respect of such Holder or Party or (ii) to any Shelf Take-Down irrespective of whether such Shelf Take-Down is an Underwritten Shelf Take-Down or
not an Underwritten Shelf Take-Down. 

  
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 Section 2.3 Restriction on Transfer. In connection with any Underwritten
Offering of Equity Securities of PubCo, each Holder that participates in such Underwritten Offering agrees that it shall not Transfer any shares of Common Stock (other than those included in such offering pursuant to this Investor Rights Agreement),
without the prior written consent of PubCo, during the period commencing seven (7) calendar days prior (to the extent notice of such Underwritten Offering has been provided) to such Underwritten Offering and ending upon the shorter of
(a) the shortest number of days that a director of PubCo, “executive officer” (as defined under Section 16 of the Exchange Act) of PubCo or any stockholder of PubCo (other than a Holder or director or employee of, or consultant
to, PubCo) who owns 10% or more of the outstanding shares of Common Stock contractually agrees with the Underwriters of such Underwritten Offering to not to sell any securities of PubCo following such Underwritten Offering and (b) the 90-day period beginning on the date of pricing of such offering, except in the event the Underwriter managing the offering otherwise agrees by written consent, and further agrees to execute a customary lock-up agreement in favor of the Underwriters to such effect (in each case, on substantially the same terms and conditions as all such Holders). 

Section 2.4 General Procedures. In connection with effecting any Registration and/or Shelf Takedown, subject to applicable Law and
any regulations promulgated by any securities exchange on which PubCo’s Equity Securities are then listed, each as interpreted by PubCo with the advice of its counsel, PubCo shall use its commercially reasonable efforts (except as set forth in
Section 2.4(d)) to effect such Registration and/or Shelf Takedown to permit the sale of the Registrable Securities included in such Registration and/or Shelf Takedown in accordance with the intended plan of distribution
thereof, and pursuant thereto PubCo shall, as expeditiously as possible: 
 (a) prepare and file with the SEC as soon as practicable a
Registration Statement with respect to such Registrable Securities and use its commercially reasonable efforts to cause such Registration Statement to become effective and remain effective until all Registrable Securities covered by such
Registration Statement have been sold; 
 (b) prepare and file with the SEC such amendments and post-effective amendments to the Registration
Statement, and such supplements to the Prospectus, as may be reasonably requested by any Holder or as may be required by the rules, regulations or instructions applicable to the registration form used by PubCo or by the Securities Act or rules and
regulations thereunder to keep the Registration Statement effective until all Registrable Securities covered by such Registration Statement are sold in accordance with the intended plan of distribution set forth in such Registration Statement or
supplement to the Prospectus; 
 (c) prior to filing a Registration Statement or Prospectus, or any amendment or supplement thereto, furnish
without charge to the Underwriters, if any, and the Holders of Registrable Securities included in such Registration, and such Holders’ legal counsel, if any, copies of such Registration Statement as proposed to be filed, each amendment and
supplement to such Registration Statement (in each case, including all exhibits thereto and documents incorporated by reference therein), the Prospectus included in such Registration Statement (including each preliminary Prospectus), and such other
documents as the Underwriters or the Holders of Registrable Securities included in such Registration or the legal counsel for any such Holders, if any, may reasonably request in order to facilitate the disposition of the Registrable Securities owned
by such Holders; 

  
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 (d) prior to any public offering of Registrable Securities, use its commercially reasonable
efforts to (i) register or qualify the Registrable Securities covered by the Registration Statement under such securities or “blue sky” Laws of such jurisdictions in the United States as the Holders of Registrable Securities included
in such Registration Statement (in light of their intended plan of distribution) may request (or provide evidence satisfactory to such Holders that the Registrable Securities are exempt from such registration or qualification) and (ii) take
such action necessary to cause such Registrable Securities covered by the Registration Statement to be registered with or approved by such other Governmental Entities as may be necessary by virtue of the business and operations of PubCo and do any
and all other acts and things that may be necessary or advisable to enable the Holders of Registrable Securities included in such Registration Statement to consummate the disposition of such Registrable Securities in such jurisdictions;
provided, however, that PubCo shall not be required to qualify generally to do business in any jurisdiction where it would not otherwise be required to qualify or take any action to which it would be subject to general service of
process or taxation in any such jurisdiction where it is not then otherwise so subject; 
 (e) cause all such Registrable Securities to be
listed on each securities exchange or automated quotation system on which similar securities issued by PubCo are then listed; 
 (f) provide
a transfer agent or warrant agent, as applicable, and registrar for all such Registrable Securities no later than the effective date of such Registration Statement; 

(g) advise each Holder of Registrable Securities covered by a Registration Statement, promptly after it shall receive notice or obtain
knowledge thereof, of the issuance of any stop order by the SEC suspending the effectiveness of such Registration Statement or the initiation or threatening of any proceeding for such purpose and promptly use its commercially reasonable efforts to
prevent the issuance of any stop order or to obtain its withdrawal if such stop order should be issued; 
 (h) at least three
(3) calendar days prior to the filing of any Registration Statement or Prospectus or any amendment or supplement to such Registration Statement or Prospectus or any document that is to be incorporated by reference into such Registration
Statement or Prospectus furnish a draft thereof to each Holder of Registrable Securities included in such Registration Statement, or its counsel, if any (excluding any exhibits thereto and any filing made under the Exchange Act that is to be
incorporated by reference therein); 
 (i) notify the Holders at any time when a Prospectus relating to such Registration Statement is
required to be delivered under the Securities Act, of the happening of any event as a result of which the Prospectus included in such Registration Statement, as then in effect, includes a Misstatement, and then to correct such Misstatement as set
forth in Section 2.7; 

  
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 (j) permit Representatives of the Holders, the Underwriters, if any, and any attorney,
consultant or accountant retained by such Holders or Underwriter to participate, at each such Person’s own expense, except to the extent such expenses constitute Registration Expenses, in the preparation of the Registration Statement, and cause
PubCo’s officers, directors and employees to supply all information reasonably requested by any such Representative, Underwriter, attorney, consultant or accountant in connection with such Registration; provided, however, that
such Persons agree to confidentiality arrangements reasonably satisfactory to PubCo, prior to the release or disclosure of any such information; 

(k) obtain a “cold comfort” letter, and a bring-down thereof, from PubCo’s independent registered public accountants in the
event of an Underwritten Offering which the participating Holders may rely on, in customary form and covering such matters of the type customarily covered by “cold comfort” letters as the managing Underwriter may reasonably request, and
reasonably satisfactory to a majority-in-interest of the participating Holders; 

(l) on the date the Registrable Securities are delivered for sale pursuant to such Registration, obtain an opinion and negative assurances
letter, dated as of such date, of counsel representing PubCo for the purposes of such Registration, addressed to the Holders, the placement agent or sales agent, if any, and the Underwriters, if any, covering such legal matters with respect to such
Registration in respect of which such opinion is being given as the Holders, placement agent, sales agent, or Underwriter may reasonably request and as are customarily included in such opinions and negative assurance letters, and reasonably
satisfactory to the participating Holders; 
 (m) in the event of any Underwritten Offering, enter into and perform its obligations under an
underwriting agreement, in usual and customary form, with the managing Underwriter of such Underwritten Offering; 
 (n) make available to
its security holders, as soon as reasonably practicable, an earnings statement covering the period of at least 12 months beginning within three months after the effective date of such Registration Statement, which satisfies the provisions of
Section 11(a) of the Securities Act and Rule 158 thereunder (or any successor rule promulgated thereafter by the SEC); 
 (o) if an
Underwritten Offering involves Registrable Securities with a total offering price (including piggyback securities and before deduction of underwriting discounts) reasonably expected to exceed, in the aggregate, $35,000,000, use its commercially
reasonable efforts to make available senior executives of PubCo to participate in customary “road show” presentations that may be reasonably requested by the Underwriter in such Underwritten Offering; and 

(p) otherwise, in good faith, cooperate reasonably with, and take such customary actions as may reasonably be requested by, the Holders in
connection with such Registration. 
 Section 2.5 Registration Expenses. The Registration Expenses of all Registrations shall be
borne by PubCo. It is acknowledged by the Holders that the Holders selling any Registrable Securities in an offering shall bear all incremental selling expenses relating to the sale of Registrable Securities (including all reasonable fees and
expenses of any legal counsel representing such Holders (to the extent such counsel is not also representing PubCo, as determined in accordance with clause (f) of the definition of “Registration Expenses”)), such as Underwriters’
commissions and discounts, brokerage fees, Underwriter marketing costs, in each case, pro rata based on the number of Registrable Securities that such Holders have sold in such Registration. 

  
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 Section 2.6 Requirements for Participating in Underwritten Offerings.
Notwithstanding anything to the contrary contained in this Investor Rights Agreement, if any Holder does not provide PubCo with its requested Holder Information, PubCo may exclude such Holder’s Registrable Securities from the applicable
Registration Statement or Prospectus if PubCo determines, based on the advice of counsel, that such information is necessary to effect the Registration and such Holder continues thereafter to withhold such information. No Person may participate in
any Underwritten Offering of Equity Securities of PubCo pursuant to a Registration under this Investor Rights Agreement unless such Person (a) agrees to sell such Person’s Registrable Securities on the basis provided in any underwriting
and other arrangements approved by PubCo in the case of an Underwritten Offering initiated by PubCo, and approved by the Demanding Holders in the case of an Underwritten Offering initiated by the Demanding Holders and (b) completes and executes
all customary questionnaires, powers of attorney, custody agreements, indemnities, lock-up agreements, underwriting agreements and other customary documents as may be reasonably required under the terms of
such underwriting arrangements. Subject to the minimum thresholds set forth in Section 2.1(c) and 2.4(o), the exclusion of a Holder’s Registrable Securities as a result of this
Section 2.6 shall not affect the registration of the other Registrable Securities to be included in such Registration. 

Section 2.7 Suspension of Sales; Adverse Disclosure. Upon receipt of written notice from PubCo that a Registration Statement or
Prospectus contains a Misstatement, each of the Holders shall forthwith discontinue disposition of Registrable Securities until it has received copies of a supplemented or amended Prospectus correcting the Misstatement (and PubCo hereby covenants to
prepare and file such supplement or amendment as soon as practicable after giving such notice), or until it is advised in writing by PubCo that the use of the Prospectus may be resumed. If the filing, initial effectiveness or continued use of a
Registration Statement in respect of any Registration at any time would require PubCo to make an Adverse Disclosure or would require the inclusion in such Registration Statement of financial statements that are unavailable to PubCo for reasons
beyond PubCo’s reasonable control, PubCo may, upon giving prompt written notice of such action to the Holders, delay the filing or initial effectiveness of, or suspend use of, such Registration Statement for the shortest period of time, but in
no event more than 90 days in any 12-month period, determined in good faith by PubCo to be necessary for such purpose. In the event PubCo exercises its rights under the preceding sentence, the Holders agree to
suspend, immediately upon their receipt of the notice referred to above, their use of the Prospectus relating to such Registration in connection with any sale or offer to sell Registrable Securities. PubCo shall immediately notify the Holders of the
expiration of any period during which it exercised its rights under this Section 2.7. 
 Section 2.8
Reporting Obligations. As long as any Holder shall own Registrable Securities, PubCo, at all times while it shall be a reporting company under the Exchange Act, covenants to file timely (or obtain extensions in respect thereof and file within
the applicable grace period) all reports required to be filed by PubCo after the Effective Date pursuant to Sections 13(a) or 15(d) of the Exchange Act and to promptly furnish the Holders with true and complete copies of all such filings;
provided that any documents publicly filed or furnished with the SEC pursuant to the Electronic Data Gathering, Analysis and Retrieval System shall be deemed to have been furnished to the Holders pursuant to this
Section 2.8. 

  
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 Section 2.9 Other Obligations. In connection with a Transfer of Registrable
Securities pursuant to SEC Rule 144 or through any broker-dealer transactions described in the plan of distribution set forth within the Prospectus and pursuant to the Registration Statement of which such Prospectus forms a part, PubCo shall,
subject to applicable Law, as interpreted by PubCo with the advice of counsel, and the receipt of any customary documentation required from the applicable Holders in connection therewith, (a) promptly instruct its transfer agent to remove any
restrictive legends applicable to the Registrable Securities being Transferred and (b) cause its legal counsel to deliver the necessary legal opinions, if any, to the transfer agent in connection with the instruction under clause (a). In
addition, PubCo shall cooperate reasonably with, and take such customary actions as may reasonably be requested by the Holders in connection with, the aforementioned Transfers; provided, however, that PubCo shall have no obligation to
participate in any “road shows” or assist with the preparation of any offering memoranda or related documentation with respect to any Transfer of Registrable Securities in any transaction that does not constitute an Underwritten Offering.

 Section 2.10 Indemnification and Contribution. 

(a) PubCo agrees to indemnify and hold harmless each Holder, its officers, managers, directors, employees, trustees, equityholders,
beneficiaries, affiliates, agents and Representatives and each Person who controls such Holder (within the meaning of the Securities Act) against all losses, claims, damages, liabilities and expenses (including attorneys’ fees) (or actions in
respect thereto) caused by, resulting from, arising out of or based upon (i) any untrue or alleged untrue statement of material fact contained in any Registration Statement, Prospectus or preliminary Prospectus or similar document incident to
any Registration, qualification, compliance or sale effected pursuant to this Article II or any amendment thereof or supplement thereto, or any omission or alleged omission of a material fact required to be stated therein or necessary to make
the statements therein not misleading or (ii) any violation or alleged violation by PubCo of the Securities Act or any other similar federal or state securities Laws, and will reimburse, as incurred, each such Holder, its officers, managers,
directors, trustees, equityholders, beneficiaries, affiliates, agents and Representatives and each Person who controls such Holder (within the meaning of the Securities Act) for any legal and any other expenses reasonably incurred in connection with
investigating or defending any such loss, claim, damage, liability or expense; provided that PubCo will not be liable in any such case to the extent that any such loss, claim, damage, liability or expense are caused by, arises out of or is
based on any untrue statement or omission made in reliance and in conformity with written information furnished to PubCo by or on behalf of such Holder expressly for use therein. PubCo shall indemnify each Underwriter, its respective officers and
directors and each Person who controls such Underwriter (within the meaning of the Securities Act) to the same extent as provided in the foregoing sentence with respect to the indemnification of each Holder. 

  
 -19- 

 (b) In connection with any Registration Statement or Prospectus in which a Holder of
Registrable Securities is participating, such Holder shall furnish to PubCo in writing such information and affidavits as PubCo reasonably requests for use in connection with any such Registration Statement or Prospectus (the “Holder
Information”) and, to the extent permitted by Law, such Holder shall indemnify and hold harmless PubCo, its officers, managers, directors, employees, trustees, equityholders, beneficiaries, affiliates, agents and Representatives and each
Person who controls PubCo (within the meaning of the Securities Act) against any losses, claims, damages, liabilities and expenses (including reasonable attorneys’ fees) (or actions in respect thereof) arising out of, resulting from or based on
any untrue statement of material fact contained in the Registration Statement, Prospectus or preliminary Prospectus or similar document or any amendment thereof or supplement thereto, or any omission of a material fact required to be stated therein
or necessary to make the statements therein not misleading, but only to the extent that such untrue statement or omission is contained in any information or affidavit so furnished in writing by or on behalf of such Holder expressly for use therein;
provided, however, that the obligation to indemnify shall be several, not joint and several, among such Holders of Registrable Securities, and the liability of each such Holder of Registrable Securities shall be in proportion to and
limited to the net proceeds received by such Holder from the sale of Registrable Securities pursuant to such Registration Statement. The Holders of Registrable Securities shall indemnify each Underwriter, its officers, directors and each Person who
controls such Underwriter (within the meaning of the Securities Act) to the same extent as provided in the foregoing sentence with respect to indemnification of PubCo. 

(c) Any Person entitled to indemnification under this Section 2.10 shall (i) give prompt written notice, after
such Person has actual knowledge thereof, to the indemnifying party of any claim or litigation with respect to which such Person seeks indemnification (provided that the failure to give prompt notice shall not impair any Person’s right to
indemnification hereunder to the extent such failure has not materially prejudiced the indemnifying party in the defense of any such claim or litigation) and (ii) permit such indemnifying party to assume the defense of such claim with counsel
reasonably satisfactory to the indemnified party (not be unreasonably withheld, conditioned or delayed) and the indemnified party may participate in such defense at the indemnifying party’s expense if representation of such indemnified party
would be inappropriate due to actual or potential differing interests between such indemnified party and any other party represented by such counsel in such proceeding. An indemnifying party, in the defense of any such claim or litigation, without
the consent of each indemnified party, may only consent to the entry of any judgment or enter into any settlement that (i) includes as a term thereof the giving by the claimant or plaintiff therein to such indemnified party of an unconditional
release from all liability with respect to such claim or litigation and (ii) does not include any recovery (including any statement as to or an admission of fault, culpability or a failure to act by or on behalf of such indemnified party) other
than monetary damages; provided that any sums payable in connection with such settlement are paid in full by the indemnifying party. 

(d) The indemnification provided under this Investor Rights Agreement shall remain in full force and effect regardless of any investigation
made by or on behalf of the indemnified party or any officer, manager, director, Representative or controlling Person of such indemnified party and shall survive the Transfer of securities. 

(e) If the indemnification provided in this Section 2.10 from the indemnifying party is unavailable or insufficient
to hold harmless an indemnified party in respect of any losses, claims, damages, liabilities and expenses referred to herein, then the indemnifying party, in lieu of indemnifying the indemnified party, shall contribute to the amount paid or payable
by the indemnified party as a result of such losses, claims, damages, liabilities and expenses in such 

  
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proportion as is appropriate to reflect the relative fault of the indemnifying party and the indemnified party, as well as any other relevant equitable considerations. The relative fault of the
indemnifying party and indemnified party shall be determined by reference to, among other things, whether any action in question, including any untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material
fact, was made by, or relates to information supplied by, such indemnifying party or indemnified party, and the indemnifying party’s and indemnified party’s relative intent, knowledge, access to information and opportunity to correct or
prevent such action; provided, however, that the liability of any Holder under this Section 2.10(e) shall be limited to the amount of the net proceeds received by such Holder in such offering giving rise to
such liability. The amount paid or payable by a Party as a result of the losses or other liabilities referred to above shall be deemed to include, subject to the limitations set forth in Sections 2.10(a), 2.10(b) and
2.10(c), any legal or other fees, charges or expenses reasonably incurred by such Party in connection with any investigation or proceeding. The Parties agree that it would not be just and equitable if contribution pursuant to this
Section 2.1(e) were determined by pro rata allocation or by any other method of allocation, which does not take account of the equitable considerations referred to in this Section 2.1(e). No Person
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution pursuant to this Section 2.1(e) from any Person who was not guilty of such fraudulent
misrepresentation. 
 Section 2.11 Other Registration Rights. Other than the registration rights set forth in the Original RRA,
in the PIPE Subscription Agreements and in the NextEra Subscription Agreement, PubCo represents and warrants that no Person, other than a Holder of Registrable Securities pursuant to this Investor Rights Agreement, has any right to require PubCo to
register any securities of PubCo for sale or to include such securities of PubCo in any Registration Statement filed by PubCo for the sale of securities for its own account or for the account of any other Person. Further, each of PubCo, the Sponsor
and the Sponsor Principals represents and warrants that this Investor Rights Agreement supersedes any other registration rights agreement or agreement (including the Original RRA), other than the PIPE Subscription Agreements and the NextEra
Subscription Agreement. 
 Section 2.12 SEC Rule 144. With a view to making available to the Holders the benefits of SEC
Rule 144, PubCo covenants that it will (a) make available at all times information necessary to comply with SEC Rule 144, if SEC Rule 144 is available with respect to resales of the Registrable Securities under the Securities Act and
(b) take such further action as the Holders may reasonably request, all to the extent required from time to time to enable them to sell Registrable Securities without registration under the Securities Act within the limitation of the exemptions
provided by SEC Rule 144 promulgated under the Securities Act (if available with respect to resales of the Registrable Securities), as such rule may be amended from time to time. Upon the request of any Holder, PubCo will deliver to such Holder a
written statement as to whether PubCo has complied with such information requirements, and, if not, the specific reasons for non-compliance. 

Section 2.13 Term. This Article II shall terminate with respect to any Holder on the date that such Holder no longer holds
any Registrable Securities. The provisions of Section 2.10 shall survive any such termination with respect to such Holder. 

  
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 Section 2.14 Holder Information. Each Holder agrees, if requested in writing by
PubCo, to represent to PubCo the total number of Registrable Securities held by such Holder in order for PubCo to make determinations under this Investor Rights Agreement, including for purposes of Section 2.12. Other than
the Sellers and the Founder Holders, a Party who does not hold Registrable Securities as of the Closing Date and who acquires Registrable Securities after the Closing Date will not be a “Holder” until such Party gives PubCo a
representation in writing of the number of Registrable Securities it holds. 
 Section 2.15 Termination of Original RRA. Upon
the Closing, PubCo, the Sponsor and the Sponsor Principals hereby agree that the Original RRA and all of the respective rights and obligations of the parties thereunder are hereby terminated in their entirety and shall be of no further force or
effect. 
 Section 2.16 Distributions; Direct Ownership. 

(a) In the event that, pursuant to and in accordance with Section 3.2, the Sponsor distributes all of its Registrable
Securities to its equityholders, limited partners and members of its general partner (the “Sponsor Members”), the Sponsor Members shall be treated as the Sponsor under this Investor Rights Agreement; provided that the Sponsor
Members, taken as a whole, shall not be entitled to rights in excess of those conferred on the Sponsor, as if the Sponsor remained a single entity party to this Investor Rights Agreement. 

(b) In the event that a Seller distributes all of its Registrable Securities to its equityholders, such equityholders shall be treated as a
Seller under this Investor Rights Agreement; provided that such equityholders, taken as a whole, shall not be entitled to rights in excess of those conferred on a Seller, as if such Seller remained a single party to this Investor Rights
Agreement. 
 Section 2.17 Adjustments. If there are any changes in the shares of Common Stock as a result of stock split, stock
dividend, combination or reclassification, or through merger, consolidation, recapitalization or other similar event, equitable adjustment shall be made in the provisions of this Investor Rights Agreement, as may be required, so that the rights,
privileges, duties and obligations under this Investor Rights Agreement shall continue with respect to the shares of Common Stock as so changed.  

ARTICLE III 
 LOCK-UP 
 Section 3.1 Lock-Up. 

(a) Each Holder (other than the Sponsor Principals, except to the extent a Sponsor Principal is a transferee (including Permitted Transferee)
of Lock-Up Shares from another Holder) severally, and not jointly, agrees with PubCo not to effect any Transfer, or make a public announcement of any intention to effect such Transfer, of any Lock-Up Shares Beneficially Owned or otherwise held by such Holder during the Lock-Up Period; provided that such prohibition shall not apply to Transfers
(i) permitted pursuant to Section 3.2 or (ii) permitted pursuant to Article II (other than Section 2.9). The “Lock-Up
Period” with respect to the Lock-Up Shares of each Holder (other than the Sponsor Principals) shall be the period commencing on 

  
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the Closing Date and continuing until the date that is one hundred eighty (180) days after the Closing Date. “Lock-Up Shares” means
the Equity Securities of PubCo and the Operating Company held by the Holders (other than the Sponsor Principals, except to the extent a Sponsor Principal is a transferee (including Permitted Transferee) of
Lock-Up Shares from another Holder), directly or indirectly, as of the Closing Date; provided that in no event shall the Warrants (or any shares of Class A Common Stock issued upon exercise of any
Warrant) be considered “Lock-Up Shares.” 
 (b) During the
Lock-Up Period, any purported Transfer of Lock-Up Shares other than in accordance with this Investor Rights Agreement shall be null and void, and PubCo shall refuse to
recognize any such Transfer for any purpose. 
 (c) The Holders acknowledge and agree that, notwithstanding anything to the contrary
contained in this Investor Rights Agreement, the Equity Securities of PubCo and the Operating Company, in each case, Beneficially Owned by such Holder shall remain subject to any restrictions on Transfer under applicable securities Laws of any
Governmental Entity, including all applicable holding periods under the Securities Act and other rules of the SEC. 
 Section 3.2
Permitted Transfers. Notwithstanding anything to the contrary contained in this Investor Rights Agreement, during the Lock-Up Period applicable to any Lock-Up
Shares of a Holder, such Holder may Transfer, without the consent of PubCo, any of such Lock-Up Shares to (a) any of such Holder’s Permitted Transferees, upon written notice to PubCo or (b)(i) a
charitable organization, upon written notice to PubCo, (ii) in the case of an individual, by virtue of Laws of descent and distribution upon death of the individual, (iii) in the case of an individual, pursuant to a qualified domestic
relations order or (iv) pursuant to any liquidation, merger, stock exchange or other similar transaction which results in all of PubCo’s stockholders having the right to exchange their shares of Common Stock for cash, securities or other
property subsequent to the Business Combination; provided that in connection with any Transfer of such Lock-Up Shares pursuant to clause (b)(ii) or
clause (b)(iii), (A) the restrictions and obligations contained in Section 3.1 and this Section 3.2 will continue to apply to such
Lock-Up Shares after any Transfer of such Lock-Up Shares and (B) the Transferee of such Lock-Up Shares shall have no rights
under this Investor Rights Agreement, unless, for the avoidance of doubt, such Transferee is a Permitted Transferee in accordance with this Investor Rights Agreement. Any Transferee of Lock-Up Shares that is a
Permitted Transferee of the Transferor shall be required, at the time of and as a condition to such Transfer, to become a party to this Investor Rights Agreement, by executing and delivering a joinder, substantially in the form attached to
this Investor Rights Agreement as Exhibit A, whereupon such Transferee will be treated as a Party (with the same rights and obligations as the Transferor) for all purposes of this Investor Rights Agreement. Notwithstanding
anything to the contrary, and for the avoidance of doubt, the Sponsor shall be permitted to forfeit any portion of its Lock-Up Shares pursuant to the Sponsor Letter. 

Section 3.3 Other Lock-Up Restrictions. Each of PubCo, the Sponsor and each Sponsor
Principal hereby acknowledge and agree that this Article III supersedes Section 5 of the Sponsor Letter in all respects, and, upon execution of this Investor Rights Agreement by each of PubCo, the Sponsor and each Sponsor Principal, the
Sponsor Letter shall be deemed amended to remove Section 5 of the Sponsor Letter. 

  
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 ARTICLE IV 

GENERAL PROVISIONS 

Section 4.1 Assignment; Successors and Assigns; No Third Party Beneficiaries. 

(a) Except as otherwise permitted pursuant to this Investor Rights Agreement, and other than assignments in connection with a distribution
pursuant to Section 2.16, no Party may assign such Party’s rights and obligations under this Investor Rights Agreement, in whole or in part, without the prior written consent of Opal HoldCo, in the case of an
assignment by a Founder Holder, or the Sponsor, in the case of an assignment by a Seller. Any such assignee may not again assign those rights, other than in accordance with this Article IV. Any attempted assignment of rights or obligations in
violation of this Article IV shall be null and void. 
 (b) Notwithstanding anything to the contrary contained in this Investor Rights
Agreement (other than the succeeding sentence of this Section 4.1(b)), (i) prior to the expiration of the Lock-Up Period with respect to any
Lock-Up Shares of a Holder, such Holder may not Transfer such Holder’s rights or obligations under this Investor Rights Agreement in connection with a Transfer of such Holder’s Registrable
Securities, in whole or in part, except in connection with a Transfer pursuant to Section 3.2, and (ii) after the expiration of the Lock-Up Period with respect to such Lock-Up Shares, such Holder may Transfer such Holder’s rights or obligations under this Investor Rights Agreement in connection with a Transfer of such Holder’s Registrable Securities, in whole or in part,
to (A) any of such Holder’s Permitted Transferees or (B) any Person with the prior written consent of PubCo. Any Transferee of Registrable Securities (other than pursuant to an effective Registration Statement or an SEC Rule 144
transaction) pursuant to this Section 4.1(b) shall be required, at the time of and as a condition to such Transfer, to become a party to this Investor Rights Agreement by executing and delivering a joinder, substantially in
the form attached to this Investor Rights Agreement as Exhibit A, whereupon such Transferee will be treated as a Party (with the same rights and obligations as the Transferor) for all purposes of this Investor Rights Agreement. No Transfer of
Registrable Securities by a Holder shall be registered on PubCo’s books and records, and such Transfer of Registrable Securities shall be null and void and not otherwise effective, unless any such Transfer is made in accordance with the terms
and conditions of this Investor Rights Agreement, and PubCo is hereby authorized by all of the Holders to enter appropriate stop transfer notations on its transfer records to give effect to this Investor Rights Agreement. 

(c) All of the terms and provisions of this Investor Rights Agreement shall be binding upon the Parties and their respective successors,
assigns, heirs and representatives, but shall inure to the benefit of and be enforceable by the successors, assigns, heirs and representatives of any Party only to the extent that they are permitted successors, assigns, heirs and representatives
pursuant to the terms of this Investor Rights Agreement. 
 (d) Nothing in this Investor Rights Agreement, express or implied, is intended to
confer upon any Party, other than the Parties and their respective permitted successors, assigns, heirs and representatives, any rights or remedies under this Investor Rights Agreement or otherwise create any third party beneficiary hereto. 

  
 -24- 

 Section 4.2 Termination. Article II of this Investor Rights Agreement
shall terminate as set forth in Section 2.13. The remainder of this Investor Rights Agreement shall terminate automatically (without any action by any Party) as to each Holder when such Holder ceases to Beneficially Own any
Registrable Securities; provided that the provisions of Section 2.10 shall survive any such termination with respect to such Holder. 

Section 4.3 Severability. If any provision of this Investor Rights Agreement is determined to be invalid, illegal or unenforceable
by any Governmental Entity, the remaining provisions of this Investor Rights Agreement, to the extent permitted by Law shall remain in full force and effect. 

Section 4.4 Entire Agreement; Amendments; No Waiver. 

(a) This Investor Rights Agreement, together with Exhibits to this Investor Rights Agreement, the BCA, the OpCo LLC Agreement, all other
Ancillary Documents, constitute the entire agreement among the Parties with respect to the subject matter hereof and thereof and supersede all prior and contemporaneous agreements, understandings and discussions, whether oral or written, relating to
such subject matter in any way and there are no warranties, representations or other agreements among the Parties in connection with such subject matter except as set forth in this Investor Rights Agreement and therein. 

(b) No provision of this Investor Rights Agreement may be amended or modified in whole or in part at any time without the express written
consent of (i) PubCo, (ii) for so long as the Sellers and their Permitted Transferees collectively Beneficially Own fifteen percent (15%) or more of the voting power of the stock of PubCo held by the Sellers immediately after
the Closing, Opal HoldCo, (iii) for so long as the Sponsor and its Permitted Transferees collectively Beneficially Own Class A Common Stock representing fifty percent (50%) or more of the Class A Common Stock held by the Sponsor
immediately after the Closing, the Sponsor, and (iv) in any event at least the Holders holding in the aggregate more than fifty percent (50%) of the Registrable Securities Beneficially Owned by the Holders; provided that any such
amendment or modification that would be materially adverse in any respect to any Holder shall require the prior written consent of such Holder; provided, further that a provision that has terminated with respect to a Party shall not require
any consent of such Party (and such Party’s Class A Common Stock shall not be considered in computing any percentages) with respect to amending or modifying such provision. 

(c) No waiver of any provision or default under, nor consent to any exception to, the terms of this Investor Rights Agreement shall be
effective unless in writing and signed by the Party to be bound and then only to the specific purpose, extent and instance so provided; provided that, notwithstanding the foregoing, no waiver of any provision or default under, nor consent to any
exception to, the terms and provisions of Article III shall be effective unless in writing and signed by each of (i) PubCo, (ii) for so long as the Sellers and their Permitted Transferees collectively Beneficially Own fifteen
percent (15%) or more of the voting power of the stock of PubCo held by the Sellers immediately after the Closing, Opal HoldCo, (iii) for so long as the Sponsor and its Permitted Transferees collectively Beneficially Own Class A
Common Stock representing fifty percent (50%) or more of the Class A Common Stock held by the Sponsor immediately after the Closing, the Sponsor and (iv) at least the Holders holding, in the aggregate, more than fifty percent (50%) of the
Registrable Securities Beneficially Owned by the Holders. 

  
 -25- 

 (d) Notwithstanding the foregoing provisions of this Section 4.4,
other than with respect to amendments, modifications, waivers or consents relating to Article III, no amendment, modification, waiver or consent shall be required by (i) the Sponsor or its Permitted Transferees, with respect to any
provision that has, in accordance with Section 4.2, terminated as to the Founder Holders or (ii) any Seller or its Permitted Transferees, with respect to any provision that has, in accordance with
Section 4.2, terminated as to such Seller or all of the Sellers. 
 Section 4.5 Counterparts; Electronic
Delivery. This Investor Rights Agreement and any other agreements, certificates, instruments and documents delivered pursuant to this Investor Rights Agreement may be executed and delivered in one or more counterparts and by email or other
electronic transmission, each of which shall be deemed an original and all of which shall be considered one and the same agreement. No Party shall raise the use of email to deliver a signature or the fact that any signature or agreement or
instrument was transmitted or communicated through the use of email as a defense to the formation or enforceability of a contract and each Party forever waives any such defense. 

Section 4.6 Notices. All notices, requests, claims, demands and other communications hereunder shall be in writing and shall be
given (and shall be deemed to have been duly given) by delivery in person, by email (having obtained electronic delivery confirmation thereof (i.e., an electronic record of the sender that the email was sent to the intended recipient thereof
without an “error” or similar message that such email was not received by such intended recipient)), or by registered or certified mail (postage prepaid, return receipt requested) (upon receipt thereof) to the other Parties as follows:

  

	 	(a)	 if to PubCo, to: 

Opal Fuels Inc. 
 [•] 

[•] 
 Attn: [•] 

E-mail: [•] 

with copies (which shall not constitute notice) to: 

c/o Fortistar 
 One North
Lexington Avenue, 14th Floor 
 White Plains, NY 10601 

	 	Attn.:	 General Counsel 

	 	Email:	 noticeofficer@fortistar.com 

  noticeofficer@opalfuels.com 

and 

  
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 Sheppard, Mullin, Richter & Hampton LLP 

30 Rockefeller Plaza 
 New York,
New York 10112 

	 	Attn:	     Andrew M. Felner 

     John H. Booher 

	 	E-mail:	   afelner@sheppardmullin.com 

    jbooher@sheppardmullin.com 
  

	 	(b)	 if to any Seller, to: 

[•] 
 [•] 

[•] 

Attn:     [•] 

E-mail: [•] 

with copies (which shall not constitute notice) to: 

c/o Fortistar 
 One North
Lexington Avenue, 14th Floor 
 White Plains, NY 10601 

Attn.:   General Counsel 

	 	Email:	 noticeofficer@fortistar.com 

  noticeofficer@opalfuels.com 

and 
 Sheppard, Mullin,
Richter & Hampton LLP 
 30 Rockefeller Plaza 

New York, New York 10112 

	 	Attn:	 Andrew M. Felner 

  John H. Booher 
 E-mail: afelner@sheppardmullin.com 
    jbooher@sheppardmullin.com 

 

	 	(c)	 if to any Founder Holder, to: 

ArcLight CTC Holdings II, L.P. 

200 Clarendon Street, 55th Floor 

Boston, MA 02116 

	 	Attn:	   General Counsel 

	 	E-mail:	  christine.miller@arclightclean.com 

  
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 with a copy (which shall not constitute notice) to: 

Kirkland & Ellis LLP 

609 Main Street 
 Houston, TX
77002 

	 	Attn:	   Doug Bacon, P.C. 

Julian Seiguer, P.C. 
 Jennifer
R. Gasser 
 E-mail: douglas.bacon@kirkland.com 

julian.seiguer@kirkland.com 

jennifer.gasser@kirkland.com 
 or to such other
address as the party to whom notice is given may have furnished following the date of this Investor Rights Agreement and prior to such notice to the others in writing in the manner set forth above. 

Section 4.7 Governing Law. This Investor Rights Agreement and the consummation of the transactions contemplated by this Investor
Rights Agreement, and any action, suit, dispute, controversy or claim arising out of this Investor Rights Agreement and the consummation of the transactions contemplated by this Investor Rights Agreement, or the validity, interpretation, breach or
termination of this Investor Rights Agreement and the consummation of the transactions contemplated by this Investor Rights Agreement shall be governed by and construed in accordance with the laws of the State of Delaware, without giving effect to
any choice of law or conflict of law provision or rule (whether of the State of Delaware or any other jurisdiction) that would cause the application of the law of any jurisdiction other than the State of Delaware. 

Section 4.8 WAIVER OF JURY TRIAL. EACH OF THE PARTIES HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES, TO THE FULLEST EXTENT
PERMITTED BY LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY WITH RESPECT TO ANY PROCEEDING, CLAIM, DEMAND, ACTION, OR CAUSE OF ACTION (A) ARISING UNDER THIS INVESTOR RIGHTS AGREEMENT OR (B) IN ANY WAY CONNECTED WITH OR RELATED OR INCIDENTAL
TO THE DEALINGS OF THE PARTIES IN RESPECT OF THIS INVESTOR RIGHTS AGREEMENT OR ANY OF THE TRANSACTIONS RELATED HERETO OR ANY FINANCING IN CONNECTION WITH THE TRANSACTIONS CONTEMPLATED HEREBY, IN EACH CASE, WHETHER NOW EXISTING OR HEREAFTER ARISING,
AND WHETHER IN CONTRACT, TORT, EQUITY, OR OTHERWISE. THE PARTIES EACH HEREBY AGREES AND CONSENTS THAT ANY SUCH PROCEEDING, CLAIM, DEMAND, ACTION OR CAUSE OF ACTION SHALL BE DECIDED BY COURT TRIAL WITHOUT A JURY AND THAT THE PARTIES MAY FILE AN
ORIGINAL COUNTERPART OF A COPY OF THIS INVESTOR RIGHTS AGREEMENT WITH ANY COURT AS WRITTEN EVIDENCE OF THE CONSENT OF THE PARTIES HERETO TO THE WAIVER OF THEIR RIGHT TO TRIAL BY JURY. EACH PARTY CERTIFIES AND ACKNOWLEDGES THAT (I) NO
REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER, (II) EACH SUCH PARTY UNDERSTANDS AND HAS CONSIDERED
THE IMPLICATIONS OF THIS WAIVER, (III) EACH SUCH PARTY MAKES THIS WAIVER VOLUNTARILY AND (IV) EACH SUCH PARTY HAS BEEN INDUCED TO ENTER INTO THIS INVESTOR RIGHTS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN
THIS Section 4.8. 

  
 -28- 

 Section 4.9 Submission to Jurisdiction. Each of the Parties irrevocably and
unconditionally submits to the exclusive jurisdiction of the Chancery Court of the State of Delaware and any state appellate court therefrom within the State of Delaware (or, if the Chancery Court of the State of Delaware declines to accept
jurisdiction, the Superior Court of the State of Delaware, or the United States District Court for the District of Delaware and, in each case, the appellate court(s) therefrom), for the purposes of any Proceeding, claim, demand, action or cause of
action (a) arising under this Investor Rights Agreement or (b) in any way connected with or related or incidental to the dealings of the Parties in respect of this Agreement or any of the transactions contemplated hereby, and irrevocably
and unconditionally waives any objection to the laying of venue of any such Proceeding in any such court, and further irrevocably and unconditionally waives and agrees not to plead or claim in any such court that any such Proceeding has been brought
in an inconvenient forum. Each Party hereby irrevocably and unconditionally waives, and agrees not to assert, by way of motion or as a defense, counterclaim or otherwise, in any Proceeding claim, demand, action or cause of action against such Party
(i) arising under this Investor Rights Agreement or (ii) in any way connected with or related or incidental to the dealings of the Parties in respect of this Investor Rights Agreement or any of the transactions contemplated hereby,
(A) any claim that such Party is not personally subject to the jurisdiction of the courts as described in this Section 4.9 for any reason, (B) that such Party or such Party’s property is exempt or immune from
the jurisdiction of any such court or from any legal process commenced in such courts (whether through service of notice, attachment prior to judgment, attachment in aid of execution of judgment, execution of judgment or otherwise) and (C) that
(1) the Proceeding, claim, demand, action or cause of action in any such court is brought against such Party in an inconvenient forum, (2) the venue of such Proceeding, claim, demand, action or cause of action against such Party is
improper or (3) this Investor Rights Agreement, or the subject matter hereof, may not be enforced against such Party in or by such courts. Each Party agrees that service of any process, summons, notice or document by registered mail to such
party’s respective address set forth in Section 4.6 shall be effective service of process for any such Proceeding, claim, demand, action or cause of action. 

Section 4.10 Specific Performance. Each Party hereby agrees and acknowledges that it will be impossible to measure in money the
damages that would be suffered if the Parties fail to comply with any of the obligations imposed on them by this Investor Rights Agreement and that, in the event of any such failure, an aggrieved Party will be irreparably damaged and will not have
an adequate remedy at Law. Any such Party shall, therefore, be entitled (in addition to any other remedy to which such Party may be entitled at Law or in equity) to injunctive relief, including specific performance, to enforce such obligations,
without the posting of any bond, and if any Proceeding should be brought in equity to enforce any of the provisions of this Investor Rights Agreement, none of the Parties shall raise the defense that there is an adequate remedy at Law. 

Section 4.11 Subsequent Acquisition of Shares. Any Equity Securities of PubCo or Operating Company acquired subsequent to the
Effective Date by a Holder shall be subject to the terms and conditions of this Investor Rights Agreement and such Equity Securities shall be considered to be “Registrable Securities.” 

  
 -29- 

 Section 4.12 Legends. Each of the Holders acknowledges that (a) no
Transfer, hypothecation or assignment of any Registrable Securities Beneficially Owned by such Holder may be made except in compliance with applicable federal and state securities Laws and (b) PubCo shall (i) place customary restrictive
legends on the certificates or book entries representing the Registrable Securities subject to this Investor Rights Agreement and (ii) remove such restrictive legends at the time the applicable Transfer and other restrictions contemplated
thereby are no longer applicable to the Registrable Securities represented by such certificates or book entries. 
 Section 4.13 No
Third Party Liabilities. This Investor Rights Agreement may only be enforced against the named parties hereto. All claims or causes of action (whether in contract or tort) that may be based upon, arise out of or relate to any of this Investor
Rights Agreement, or the negotiation, execution or performance of this Investor Rights Agreement (including any representation or warranty made in or in connection with this Investor Rights Agreement or as an inducement to enter into this Investor
Rights Agreement), may be made only against the Persons that are expressly identified as parties hereto, as applicable, and no past, present or future direct or indirect director, officer, employee, incorporator, member, partner, stockholder,
Affiliate, portfolio company in which any such Party or any of its investment fund Affiliates have made a debt or equity investment (and vice versa), agent, attorney or representative of any Party (including any Person negotiating or executing this
Investor Rights Agreement on behalf of a Party), unless a Party to this Investor Rights Agreement, shall have any liability or obligation with respect to this Investor Rights Agreement or with respect any claim or cause of action (whether in
contract or tort) that may arise out of or relate to this Investor Rights Agreement, or the negotiation, execution or performance of this Investor Rights Agreement (including a representation or warranty made in or in connection with this Investor
Rights Agreement or as an inducement to enter into this Investor Rights Agreement). 
 Section 4.14 Confidential
Information. Each of the Parties recognizes that it, or its Affiliates and Representatives, has acquired or will acquire Confidential Information the use or disclosure of which could cause PubCo substantial loss and damages that could not be
readily calculated and for which no remedy at Law would be adequate. Accordingly, each of the Parties covenants and agrees with PubCo that it will not (and will cause its respective controlled Affiliates and Representatives not to) at any time,
except with the prior written consent of PubCo, directly or indirectly, disclose any Confidential Information known to it to any third party, unless (a) such information becomes known to the public through no fault of such Party,
(b) disclosure is required by applicable Law or court of competent jurisdiction or requested by a Governmental Entity; provided that such Party promptly notifies PubCo of such requirement or request and takes commercially reasonable
steps, at the sole cost and expense of PubCo, to minimize the extent of any such required disclosure, (c) such information was available or becomes available to such Party before, on or after the Effective Date, without restriction, from a
source (other than PubCo) without any breach of duty to PubCo or (d) such information was independently developed by such Party or its Representatives without the use of Confidential Information. Notwithstanding the foregoing, nothing in this
Investor Rights Agreement shall prohibit any Party from disclosing Confidential Information to any Affiliate, Representative, limited partner, member or shareholder of such Party; provided that such Person shall be bound by an obligation of
confidentiality with respect to such Confidential Information and such Party shall be responsible for any breach of this Section 4.12 by any such Person. No Confidential Information shall be deemed to be provided to any
Person, including any Affiliate of any Party, unless such Confidential Information is actually provided to such Person. 

  
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 Section 4.15 Indemnification. 

(a) In connection with any Registration Statement in which a Holder of Registrable Securities is participating, PubCo agrees to indemnify, to
the extent permitted by law, each such Holder of Registrable Securities, its officers, directors, employees, advisors, agents, Representatives, members and each Person who controls such Holder (within the meaning of the Securities Act) against all
losses, claims, damages, liabilities and expenses (including attorneys’ fees and inclusive of all reasonable attorneys’ fees arising out of the enforcement of each such Persons’ rights under
this Section 4.15) resulting from any untrue or alleged untrue statement of material fact contained in any Registration Statement, Prospectus or preliminary Prospectus or any amendment thereof or supplement thereto or
any omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances in which they were made, not misleading, except insofar as the same are caused by or
contained in any information furnished in writing to PubCo by such Holder expressly for use therein. PubCo shall indemnify the Underwriters, their officers and directors and each Person who controls such Underwriters (within the meaning of the
Securities Act) to the same extent as provided in the foregoing with respect to the indemnification of the Holder. Notwithstanding the foregoing, the indemnity agreement contained in this Section 4.15(a) shall not apply to
amounts paid in settlement of any such claim or proceeding if such settlement is effected without the consent of PubCo, which consent shall not be unreasonably withheld, conditioned or delayed. 

(b) In connection with any Registration Statement in which a Holder of Registrable Securities is participating, such Holder shall furnish to
PubCo in writing such information and affidavits as PubCo reasonably requests for use in connection with any such Registration Statement or Prospectus and, to the extent permitted by law, shall, indemnify PubCo, its directors and officers and agents
and each Person who controls PubCo (within the meaning of the Securities Act) and any other Holders of Registrable Securities participating in the Registration, against any losses, claims, damages, liabilities and expenses (including without
limitation reasonable attorneys’ fees) resulting from any untrue statement of material fact contained in the Registration Statement, Prospectus or preliminary Prospectus or any amendment thereof or supplement thereto or any omission of a
material fact required to be stated therein or necessary to make the statements therein not misleading, but only to the extent that such untrue statement or omission is contained in any information or affidavit so furnished in writing by such Holder
expressly for use therein; provided, however, that the obligation to indemnify shall be several, not joint and several, among such Holders of Registrable Securities, and the liability of each such Holder of Registrable Securities shall
be in proportion to and limited to the net proceeds received by such Holder from the sale of Registrable Securities pursuant to such Registration Statement. The Holders of Registrable Securities shall indemnify the Underwriters, their officers,
directors and each Person who controls such Underwriters (within the meaning of the Securities Act) to the same extent as provided in the foregoing with respect to indemnification of PubCo. 

(c) Any Person entitled to indemnification herein shall (i) give prompt written notice to the indemnifying party of any claim with respect
to which it seeks indemnification (provided that the failure to give prompt notice shall not impair any Person’s right to indemnification hereunder to the extent such failure has not materially prejudiced the indemnifying party’s
ability to defend such action) and (ii) unless in such indemnified party’s reasonable judgment a conflict of interest between such indemnified and indemnifying parties 

  
 -31- 

 
may exist with respect to such claim or there may be reasonable defenses available to the indemnified party that are different from or additional to those available to the indemnifying party,
permit such indemnifying party to assume the defense of such claim with counsel reasonably satisfactory to the indemnified party. If such defense is assumed, the indemnifying party shall not be subject to any liability for any settlement made by the
indemnified party without its consent (but such consent shall not be unreasonably withheld). An indemnifying party who is not entitled to, or elects not to, assume the defense of a claim shall not be obligated to pay the fees and expenses of more
than one counsel for all parties indemnified by such indemnifying party with respect to such claim, unless in the reasonable judgment of any indemnified party a conflict of interest may exist between such indemnified party and any other of such
indemnified parties with respect to such claim. No indemnifying party shall, without the consent of the indemnified party, consent to the entry of any judgment or enter into any settlement which cannot be settled in all respects by the payment of
money (and such money is so paid by the indemnifying party pursuant to the terms of such settlement) or which settlement does not include as an unconditional term thereof the giving by the claimant or plaintiff to such indemnified party of a release
from all liability in respect to such claim or litigation. 
 (d) The indemnification provided for under this Agreement shall remain in full
force and effect regardless of any investigation made by or on behalf of the indemnified party or any officer, director or controlling Person of such indemnified party and shall survive the transfer of securities. PubCo and each Holder of
Registrable Securities participating in an offering also agrees to make such provisions as are reasonably requested by any indemnified party for contribution to such party in the event PubCo’s or such Holder’s indemnification is
unavailable for any reason. 
 (e) If the indemnification provided under this Section 4.15 from the indemnifying
party is held by a court of competent jurisdiction to be unavailable or insufficient to hold harmless an indemnified party in respect of any losses, claims, damages, liabilities and expenses referred to herein, then the indemnifying party, in lieu
of indemnifying the indemnified party, shall to the extent permitted by law contribute to the amount paid or payable by the indemnified party as a result of such losses, claims, damages, liabilities and expenses in such proportion as is appropriate
to reflect the relative fault of the indemnifying party and the indemnified party, as well as any other relevant equitable considerations. The relative fault of the indemnifying party and indemnified party shall be determined by a court of law by
reference to, among other things, whether any action in question, including any untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact, was made by, or relates to information supplied by, such
indemnifying party or indemnified party, and the indemnifying party’s and indemnified party’s relative intent, knowledge, access to information and opportunity to correct or prevent such action; provided, however, that the
liability of any Holder under this Section 4.15(e) shall be limited to the amount of the net proceeds received by such Holder in such offering giving rise to such liability except in the case of fraud or willful misconduct
by such Holder. The amount paid or payable by a party as a result of the losses or other liabilities referred to above shall be deemed to include, subject to the limitations set forth in Section 4.15(a),
Section 4.15(b) and Section 4.15(c), any legal or other fees, charges or expenses reasonably incurred by such party in connection with any investigation or proceeding. The Parties agree that it
would not be just and equitable if contribution pursuant to this Section 4.15(e) were determined by pro rata allocation or by any other method of allocation, which does not take

  
 -32- 

 
account of the equitable considerations referred to in this Section 4.15(e). No Person guilty of fraudulent misrepresentation (within the meaning of Section 11(f)
of the Securities Act) shall be entitled to contribution pursuant to this Section 4.15(e) from any Person who was not guilty of such fraudulent misrepresentation. 

[Signature Pages Follow] 

  
 -33- 

 IN WITNESS WHEREOF, each of the Parties has duly executed this Investor Rights Agreement as
of the Effective Date. 
  

			
	PUBCO:
	
	OPAL FUELS INC.
		
	By:	 	  

		 	Name:
		 	Title:
	
	SPONSOR:
	
	ARCLIGHT CTC HOLDINGS II, L.P.
		
	By:	 	  

		 	Name:
		 	Title:

  
 [Signature Page to
Investor Rights Agreement] 

 
			
	SELLERS:
	
	ARCC BEACON LLC
		
	By:	 	  

		 	Name:
		 	Title:
	
	OPAL HOLDCO LLC
		
	By:	 	  

		 	Name:
		 	Title:
	
	HILLMAN RNG INVESTMENTS, LLC
		
	By:	 	  

		 	Name:
		 	Title:

  
 [Signature Page to
Investor Rights Agreement] 

 
			
	SPONSOR PRINCIPALS:
	
	Solely for purposes of Article I, Section 2.11, Section 2.15, Section 2.16(a), Section 3.3 and Article IV:
	
	  

	Arno Harris
	
	  

	Ja-Chin Audrey Lee
	
	  

	Brian Goncher
	
	  

	Steven Berkenfeld

  
 [Signature Page to
Investor Rights Agreement] 

 Exhibit A 

Form of Joinder 

This Joinder (this “Joinder”) to the Investor Rights Agreement, made as of
                            , is by and between
                             (“Transferor”) and
                             (“Transferee”). 

WHEREAS, as of the date hereof, Transferee is acquiring Registrable Securities (the “Acquired Interests”) from
Transferor; 
 WHEREAS, Transferor is a party to that certain Investor Rights Agreement, dated as of [•], 2022, by and among Opal Fuels
Inc. (“PubCo”) and the other persons party thereto (the “Investor Rights Agreement”); and 
 WHEREAS,
Transferee is required, at the time of and as a condition to the Transfer of the Acquired Interests, to become a party to the Investor Rights Agreement by executing and delivering this Joinder, whereupon Transferee will be treated as a Party (with
the same rights and obligations as Transferor) for all purposes of the Investor Rights Agreement. 
 NOW, THEREFORE, in consideration of the
foregoing and the respective covenants and agreements set forth herein, and intending to be legally bound hereby, the parties hereto agree as follows: 

Section 1.1 Definitions. To the extent capitalized words used in this Joinder are not defined in this Joinder, such words shall
have the respective meanings set forth in the Investor Rights Agreement. 
 Section 1.2 Acquisition. Transferor hereby Transfers
to Transferee all of the Acquired Interests. 
 Section 1.3 Joinder. Transferee hereby acknowledges and agrees that
(a) Transferee has received and read the Investor Rights Agreement, (b) Transferee is acquiring the Acquired Interests in accordance with and subject to the terms and conditions of the Investor Rights Agreement and (c) Transferee will
be treated as a Party (with the same rights and obligations as Transferor) for all purposes of the Investor Rights Agreement. 

Section 1.4 Notice. Any notice, demand or other communication under the Investor Rights Agreement shall be given to Transferee at
the address set forth on the signature page hereto in accordance with Section 4.6 of the Investor Rights Agreement. 

Section 1.5 Governing Law. This Joinder shall be governed by and construed in accordance with the Law of the State of Delaware.

 Section 1.6 Counterparts; Electronic Delivery. This Joinder may be executed and
delivered in one or more counterparts, by fax, email or other electronic transmission, each of which shall be deemed an original and all of which shall be considered one and the same agreement. The words “execution,” “signed,”
“signature,” “delivery,” and words of like import in or relating to this Joinder or any document to be signed in connection with this Joinder shall be deemed to include electronic signatures, deliveries or the keeping of records
in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery thereof or the use of a paper-based recordkeeping system, as the case may be, and the parties hereto
consent to conduct the transactions contemplated hereunder by electronic means. 
 [Signature Pages Follow] 

 IN WITNESS WHEREOF, this Joinder has been duly executed and delivered by the parties as of
the date first above written. 
  

			
	[TRANSFEROR]
		
	By:	 	
                     
    

	Name:	 	
                     
    

	Title:	 	
                     
    

	
	[TRANSFEREE]
		
	By:	 	
                     
    

	Name:	 	
                     
    

	Title:	 	
                     
    

	
	Address for notices:

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