UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

For the quarterly period ended March 31, 2021

OR

For the transition period from                      to                     

ARCLIGHT CLEAN TRANSITION CORP. II

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (617) 531-6300

Not Applicable

(Former name or former address, if changed since last report)

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

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

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

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

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

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

As of May 20, 2021, 27,627,174 Class A ordinary shares, par value $0.0001, and 6,810,326 Class B ordinary shares, par value $0.0001, were issued and outstanding.

ARCLIGHT CLEAN TRANSITION CORP. II

Quarterly Report on Form 10-Q

Table of Contents

PART I—FINANCIAL INFORMATION

Item 1. Financial Statements.

ARCLIGHT CLEAN TRANSITION CORP. II

UNAUDITED CONDENSED BALANCE SHEET

MARCH 31, 2021

The accompanying notes are an integral part of these unaudited condensed financial statements.

1

ARCLIGHT CLEAN TRANSITION CORP. II

UNAUDITED CONDENSED STATEMENT OF OPERATIONS

FOR THE PERIOD FROM JANUARY 13, 2021 (INCEPTION) THROUGH MARCH 31, 2021

The accompanying notes are an integral part of these unaudited condensed financial statements.

2

ARCLIGHT CLEAN TRANSITION CORP. II

UNAUDITED CONDENSED STATEMENT OF CHANGES IN SHAREHOLDERS’ EQUITY

FOR THE PERIOD FROM JANUARY 13, 2021 (INCEPTION) THROUGH MARCH 31, 2021

The accompanying notes are an integral part of these unaudited condensed financial statements.

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ARCLIGHT CLEAN TRANSITION CORP. II

UNAUDITED CONDENSED STATEMENT OF CASH FLOWS

FOR THE PERIOD FROM JANUARY 13, 2021 (INCEPTION) THROUGH MARCH 31, 2021

The accompanying notes are an integral part of these unaudited condensed financial statements.

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

Note 1—Description of Organization, Business Operations and Basis of Presentation

ArcLight Clean Transition Corp. II (the “Company”) is a blank check company incorporated as a Cayman Islands exempted company on January 13, 2021. The Company was incorporated for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses that the Company has not yet identified (“Business Combination”).

As of March 31, 2021, the Company had not yet commenced operations. All activity for the period from January 13, 2021 (inception) through March 31, 2021 relates to the Company’s formation and the initial public offering (the “Initial Public Offering”), which is described below, and, since the closing of the Initial Public Offering, a search for a business combination candidate. The Company will not generate any operating revenues until after the completion of its initial Business Combination, at the earliest. The Company will generate non-operating income in the form of interest income from the proceeds derived from the Initial Public Offering. The Company has selected December 31 as its fiscal year end.

The Company’s sponsor is ArcLight CTC Holdings II, L.P., a Delaware limited partnership (“Sponsor”). The registration statement for the Company’s Initial Public Offering was declared effective on March 22, 2021. On March 25, 2021, the Company consummated its Initial Public Offering of 31,116,305 units (the “Units” and, with respect to the Class A ordinary shares included in the Units being offered, the “Public Shares”), including the partial exercise of the underwriters’ option to purchase 3,616,305 additional Units (the “Over-Allotment Units”), at $10.00 per Unit, generating gross proceeds of approximately $311.2 million (see Note 3), and incurring offering costs of approximately $17.6 million, of which approximately $10.9 million was for deferred underwriting commissions (see Note 6).

Simultaneously with the closing of the Initial Public Offering, the Company consummated the private placement (“Private Placement”) of 9,223,261 warrants (each, a “Private Placement Warrant” and collectively, the “Private Placement Warrants”), at a price of $1.00 per Private Placement Warrant with the Sponsor, generating gross proceeds of approximately $9.2 million (see Note 4).

Upon the closing of the Initial Public Offering and the Private Placement, approximately $311.2 million of the net proceeds of the Initial Public Offering and certain of the proceeds of the Private Placement were placed in a trust account (“Trust Account”) with Continental Stock Transfer & Trust Company acting as trustee and invested in United States “government securities” within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended, or the Investment Company Act, having a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 promulgated under the Investment Company Act which invest only in direct U.S. government treasury obligations, as determined by the Company, until the earlier of: (i) the completion of a Business Combination and (ii) the distribution of the Trust Account as described below.

The Company’s management has broad discretion with respect to the specific application of the net proceeds of its Initial Public Offering and the sale of Private Placement Warrants, although substantially all of the net proceeds are intended to be applied generally toward consummating a Business Combination. The Company’s initial Business Combination must be with one or more operating businesses or assets with a fair market value equal to at least 80% of the net assets held in the Trust Account (excluding the deferred underwriting commissions and taxes payable on the interest earned on the Trust Account) at the time the Company signs a definitive agreement in connection with the initial Business Combination. However, the Company will only complete a Business Combination if the post-transaction company owns or acquires 50% or more of the outstanding voting securities of the target or otherwise acquires a controlling interest in the target sufficient for it not to be required to register as an investment company under the Investment Company Act.

The Company will provide its holders of the Public Shares (the “Public Shareholders”) with the opportunity to redeem all or a portion of their Public Shares upon the completion of a Business Combination either (i) in connection with a shareholder meeting called to approve the Business Combination or (ii) by means of a tender offer. The decision as to whether the Company will seek shareholder approval of a Business Combination or conduct a tender offer will be made by the Company, solely in its discretion. The Public Shareholders will be entitled to redeem their Public Shares for a pro rata portion of the amount then in the Trust Account ($10.00 per share, plus any pro rata interest earned on the funds held in the Trust Account and not previously released to the Company to pay its tax obligations). The per-share amount to be distributed to Public Shareholders who redeem their Public Shares will not be reduced by

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

the deferred underwriting commissions the Company will pay to the underwriters (as discussed in Note 6). These Public Shares were recorded at a redemption value and classified as temporary equity, in accordance with Accounting Standards Codification (“ASC”) Topic 480 “Distinguishing Liabilities from Equity.” In such case, the Company will proceed with a Business Combination if the Company has net tangible assets of at least $5,000,001 upon such consummation of a Business Combination and a majority of the shares voted are voted in favor of the Business Combination. If a shareholder vote is not required by law and the Company does not decide to hold a shareholder vote for business or other legal reasons, the Company will, pursuant to the amended and restated memorandum and articles of association which will be adopted by the Company upon the consummation of the Initial Public Offering (the “Amended and Restated Memorandum and Articles of Association”), conduct the redemptions pursuant to the tender offer rules of the U.S. Securities and Exchange Commission (the “SEC”), and file tender offer documents with the SEC prior to completing a Business Combination. If, however, a shareholder approval of the transactions is required by law, or the Company decides to obtain shareholder approval for business or legal reasons, the Company will offer to redeem shares in conjunction with a proxy solicitation pursuant to the proxy rules and not pursuant to the tender offer rules. Additionally, each Public Shareholder may elect to redeem their Public Shares irrespective of whether they vote for or against the proposed transaction. If the Company seeks shareholder approval in connection with a Business Combination, the holders of the Founder Shares prior to this Initial Public Offering (the “Initial Shareholders”) agreed to vote their Founder Shares (as defined in Note 5) and any Public Shares purchased during or after the Initial Public Offering in favor of a Business Combination. In addition, the Initial Shareholders agreed to waive their redemption rights with respect to their Founder Shares and Public Shares in connection with the completion of a Business Combination. In addition, the Company agreed not to enter into a definitive agreement regarding an initial Business Combination without the prior consent of the Sponsor.

Notwithstanding the foregoing, the Company’s Amended and Restated Memorandum and Articles of Association provide that a Public Shareholder, together with any affiliate of such shareholder or any other person with whom such shareholder is acting in concert or as a “group” (as defined under Section 13 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), will be restricted from redeeming its shares with respect to more than an aggregate of 15% or more of the Class A ordinary shares sold in the Initial Public Offering, without the prior consent of the Company.

The Company’s Sponsor, executive officers and directors agreed not to propose an amendment to the Company’s Amended and Restated Memorandum and Articles of Association that would affect the substance or timing of the Company’s obligation to provide for the redemption of its Public Shares in connection with a Business Combination or to redeem 100% of its Public Shares if the Company does not complete a Business Combination, unless the Company provides the Public Shareholders with the opportunity to redeem their Class A ordinary shares in conjunction with any such amendment.

If the Company is unable to complete a Business Combination within 24 months from the closing of the Initial Public Offering, or March 25, 2023 (the “Combination Period”), the Company will (i) cease all operations except for the purpose of winding up; (ii) as promptly as reasonably possible but not more than ten business days thereafter, redeem the Public Shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account and not previously released to the Company to pay its income taxes, if any (less up to $100,000 of interest to pay dissolution expenses) divided by the number of the then-outstanding Public Shares, which redemption will completely extinguish Public Shareholders’ rights as shareholders (including the right to receive further liquidation distributions, if any); and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the remaining shareholders and the board of directors, liquidate and dissolve, subject in the case of clauses (ii) and (iii), to the Company’s obligations under Cayman Islands law to provide for claims of creditors and the requirements of other applicable law.

In connection with the redemption of 100% of the Company’s outstanding Public Shares for a portion of the funds held in the Trust Account, each holder will receive a full pro rata portion of the amount then in the Trust Account, plus any pro rata interest earned on the funds held in the Trust Account and not previously released to the Company to pay the Company’s taxes payable (less up to $100,000 of interest to pay dissolution expenses).

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

The Initial Shareholders agreed to waive their liquidation rights with respect to the Founder Shares if the Company fails to complete a Business Combination within the Combination Period. However, if the Initial Shareholders should acquire Public Shares in or after the Initial Public Offering, they will be entitled to liquidating distributions from the Trust Account with respect to such Public Shares if the Company fails to complete a Business Combination within the Combination Period. The underwriters agreed to waive their rights to their deferred underwriting commission (see Note 6) held in the Trust Account in the event the Company does not complete a Business Combination within in the Combination Period and, in such event, such amounts will be included with the funds held in the Trust Account that will be available to fund the redemption of the Company’s Public Shares. In the event of such distribution, it is possible that the per share value of the residual assets remaining available for distribution (including Trust Account assets) will be only $10.00 per share initially held in the Trust Account. In order to protect the amounts held in the Trust Account, the Sponsor agreed that it will be liable to the Company if and to the extent any claims by a third party for services rendered or products sold to the Company, or a prospective target business with which the Company has entered into a written letter of intent, confidentiality or other similar agreement or business combination agreement, reduce the amount of funds in the Trust Account to below the lesser of (i) $10.00 per Public Share and (ii) the actual amount per Public Share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per share due to reductions in the value of the Trust assets, less taxes payable, provided that such liability will not apply to any claims by a third party or prospective target business who executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is enforceable) nor will it apply to any claims under the Company’s indemnity of the underwriters of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). In the event that an executed waiver is deemed to be unenforceable against a third party, the Sponsor will not be responsible to the extent of any liability for such third-party claims. The Company will seek to reduce the possibility that the Sponsor will have to indemnify the Trust Account due to claims of creditors by endeavoring to have vendors, service providers (except the Company’s independent registered public accounting firm), prospective target businesses or other entities with which the Company does business, execute agreements with the Company waiving any right, title, interest or claim of any kind in or to monies held in the Trust Account.

Liquidity and Capital Resources

As of March 31, 2021, the Company had approximately $2.8 million in its operating bank account and a working capital of approximately $2.4 million.

The Company’s liquidity needs up to March 31, 2021 had been satisfied through a payment of $25,000 from the Sponsor to cover certain expenses on behalf of the Company in exchange for the issuance of the Founder Shares (as defined below), the loan under the Note from the Sponsor of approximately $172,000 (see Note 5) to the Company, and the net proceeds from the consummation of the Private Placement not held in the Trust Account. The Note from the Sponsor was repaid in full on March 26, 2021. In addition, in order to finance transaction costs in connection with a Business Combination, the Company’s officers, directors and Initial Shareholders may, but are not obligated to, provide the Company Working Capital Loans (see Note 5). To date, there were no amounts outstanding under any Working Capital Loans.

Based on the foregoing, management believes that the Company will have sufficient working capital and borrowing capacity from the Sponsor or an affiliate of the Sponsor, or certain of the Company’s officers and directors to meet its needs through the earlier of the consummation of a Business Combination or one year from this filing. Over this time period, the Company will be using these funds for paying existing accounts payable, identifying and evaluating prospective initial Business Combination candidates, performing due diligence on prospective target businesses, paying for travel expenditures, selecting the target business to merge with or acquire, and structuring, negotiating and consummating the Business Combination.

Management continues to evaluate the impact of the COVID-19 pandemic and has concluded that the specific impact is not readily determinable as of the date of the balance sheet. The financial statement does not include any adjustments that might result from the outcome of this uncertainty.

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

Note 2—Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited condensed financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and Article 8 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP. In the opinion of management, all adjustments (consisting of normal accruals) considered for a fair presentation have been included. Operating results for the period from January 13, 2021 (Inception) through March 31, 2021 are not necessarily indicative of the results that may be expected for the period from January 13, 2021 (inception) through December 31, 2021.

Emerging Growth Company

The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act, as modified by the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”), and it may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act of 2002, reduced disclosure obligations regarding executive compensation in its shareholder reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved.

Further, Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that an emerging growth company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging growth companies but any such an election to opt out is irrevocable. The Company has elected not to opt out of such extended transition period, which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard.

This may make comparison of the Company’s financial statement with another public company that is neither an emerging growth company nor an emerging growth company that has opted out of using the extended transition period difficult or impossible because of the potential differences in accounting standards used.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires the Company’s management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statement. Making estimates requires management to exercise significant judgment. It is at least reasonably possible that the estimate of the effect of a condition, situation or set of circumstances that existed at the date of the financial statement, which management considered in formulating its estimate, could change in the near term due to one or more future confirming events. Accordingly, the actual results could differ significantly from those estimates.

Cash and Cash Equivalents

The Company considers all short-term investments with an original maturity of three months or less when purchased to be cash equivalents.

Investments Held in Trust Account

The Company’s portfolio of investments is comprised solely of U.S. government securities, within the meaning set forth in Section 2(a)(16) of the Investment Company Act, with a maturity of 185 days or less, or investments in money market funds that invest in U.S. government securities, or a combination thereof. The Company’s investments held in the Trust Account are classified as trading securities. Trading securities are presented on the balance sheet at fair value at the end of each reporting period. Gains and losses resulting from the change in fair value of these securities is included in net gain on investments, dividends and interest held in Trust Account in the accompanying unaudited condensed statement of operations. The estimated fair values of investments held in the Trust Account are determined using available market information.

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash accounts in a financial institution, which, at times, may exceed the Federal Depository Insurance Coverage of $250,000, and investments held in Trust Account. At March 31, 2021, the Company has not experienced losses on these accounts and management believes the Company is not exposed to significant risks on such accounts.

Fair Value of Financial Instruments

Fair value is defined as the price that would be received for sale of an asset or paid for transfer of a liability, in an orderly transaction between market participants at the measurement date. U.S. GAAP establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value.

The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). These tiers include:

In some circumstances, the inputs used to measure fair value might be categorized within different levels of the fair value hierarchy. In those instances, the fair value measurement is categorized in its entirety in the fair value hierarchy based on the lowest level input that is significant to the fair value measurement.

As of March 31, 2021, the carrying values of cash, accounts payable and accrued expenses approximate their fair values due to the short-term nature of the instruments. The Company’s portfolio of investments held in the Trust Account is comprised of investments in U.S. Treasury securities with an original maturity of 185 days or less or investments in money market funds that invest in U.S. government securities, or a combination thereof. The fair value for trading securities is determined using quoted market prices in active markets.

Derivative warrant liabilities

The Company does not use derivative instruments to hedge exposures to cash flow, market, or foreign currency risks. The Company evaluates all of its financial instruments, including issued share purchase warrants, to determine if such instruments are derivatives or contain features that qualify as embedded derivatives, pursuant to ASC 480 and ASC 815-15. The classification of derivative instruments, including whether such instruments should be recorded as liabilities or as equity, is re-assessed at the end of each reporting period.

The Company issued an aggregate of 6,223,261 ordinary shares warrants associated with Units issued to investors in our Initial Public Offering and the underwriters’ exercise of their overallotment option and we issued 9,223,261 Private Placement Warrants. All of our outstanding warrants are recognized as derivative liabilities in accordance with ASC 815-40. Accordingly, the Company recognizes the warrant instruments as liabilities at fair value and adjust the instruments to fair value at each reporting period. The liabilities are subject to remeasurement at each balance sheet date until exercised, and any change in fair value is recognized in the Company’s statement of operations. The fair value of warrants issued in connection with the Initial Public Offering and Private Placement were initially measured at fair value using a Monte Carlo simulation model and subsequently, the fair value of the Private Placement warrants have been estimated using a Monte Carlo simulation model each measurement date. The fair value of Warrants issued in connection with our Initial Public Offering have subsequently been measured based on the listed market price of such warrants.

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

Offering Costs Associated with the Initial Public Offering

Offering costs consisted of legal, accounting, underwriting and other costs incurred that were directly related to the Initial Public Offering. Offering costs are allocated to the separable financial instruments issued in the Initial Public Offering based on a relative fair value basis, compared to total proceeds received. Offering costs associated with warrant liabilities are expensed as incurred, presented as non-operating expenses in the statement of operations. Offering costs associated with the Class A ordinary shares were charged to shareholders’ equity upon the completion of the Initial Public Offering.

Class A Ordinary Shares Subject to Possible Redemption

The Company accounts for its Class A ordinary shares subject to possible redemption in accordance with the guidance in ASC Topic 480 “Distinguishing Liabilities from Equity.” Class A ordinary shares subject to mandatory redemption (if any) are classified as liability instruments and are measured at fair value. Conditionally redeemable Class A ordinary shares (including Class A ordinary shares that feature redemption rights that are either within the control of the holder or subject to redemption upon the occurrence of uncertain events not solely within the Company’s control) are classified as temporary equity. At all other times, Class A ordinary shares are classified as shareholders’ equity. The Company’s Class A ordinary shares feature certain redemption rights that are considered to be outside of the Company’s control and subject to the occurrence of uncertain future events. Accordingly, at March 31, 2021, 28,295,737 Class A ordinary shares subject to possible redemption are presented as temporary equity, outside of the shareholders’ equity section of the Company’s balance sheet.

Income Taxes

The Company complies with the accounting and reporting requirements of ASC Topic 740, “Income Taxes,” which requires an asset and liability approach to financial accounting and reporting for income taxes. Deferred income tax assets and liabilities are computed for differences between the financial statement and tax bases of assets and liabilities that will result in future taxable or deductible amounts, based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount expected to be realized.

ASC Topic 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more-likely-than-not to be sustained upon examination by taxing authorities. The Company’s management determined that the Cayman Islands is the Company’s only major tax jurisdiction. The Company recognizes accrued interest and penalties related to unrecognized tax benefits as income tax expense. There were no unrecognized tax benefits and no amounts accrued for interest and penalties as of March 31, 2021. The Company is currently not aware of any issues under review that could result in significant payments, accruals or material deviation from its position.

There is currently no taxation imposed on income by the Government of the Cayman Islands. In accordance with Cayman federal income tax regulations, income taxes are not levied on the Company. Consequently, income taxes are not reflected in the Company’s financial statement. The Company’s management does not expect that the total amount of unrecognized tax benefits will materially change over the next twelve months.

Net Loss Per Ordinary Share

The Company complies with accounting and disclosure requirements of FASB ASC Topic 260, “Earnings Per Share.” Net loss per share is computed by dividing net loss by the weighted average number of shares of ordinary shares outstanding during the period excluding ordinary shares subject to forfeiture. An aggregate of 28,295,737 shares of Class A ordinary shares subject to possible redemption at March 31, 2021 has been excluded from the calculation of basic loss per share ordinary share, since such shares, if redeemed, only participate in their pro rata share of the trust earnings. The Company has not considered the effect of the warrants sold in the Initial Public Offering (including the consummation of the Over-Allotment Units) and Private Placement to purchase an aggregate of 15,446,522 shares of the Company’s ordinary shares in the calculation of diluted loss per share, since the exercise of the warrants are contingent upon the occurrence of future events and the inclusion of such warrants would be anti-dilutive.

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

The Company’s statement of operations includes a presentation of income (loss) per share for Redeemable Class A ordinary shares in a manner similar to the two-class method of income (loss) per share. Net income per ordinary share, basic and diluted, for Redeemable Class A Ordinary Shares is calculated by dividing the proportionate share of income or loss on marketable securities held by the Trust Account, net of applicable franchise and income taxes, by the weighted average number of Ordinary shares subject to possible redemption outstanding since original issuance.

Net loss per share, basic and diluted, for Non-Redeemable Class A and Class B Ordinary Shares is calculated by dividing the net loss, adjusted for income or loss on marketable securities attributable to Redeemable Class A Ordinary Shares, by the weighted average number of non-redeemable ordinary share outstanding for the period.

Non-Redeemable Class A and Class B Ordinary Shares includes Founder Shares and non-redeemable shares of ordinary shares as these shares do not have any redemption features. Non-Redeemable Class A and Class B Ordinary Shares participates in the income or loss on marketable securities based on non-redeemable ordinary shares’ proportionate interest.

The basic and diluted loss per common share is calculated as follows:

Recent Accounting Pronouncements

Management does not believe that any recently issued, but not yet effective, accounting pronouncement if currently adopted would have a material effect on the Company’s financial statements.

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

Note 3—Initial Public Offering

On March 25, 2021, the Company consummated its Initial Public Offering of 31,116,305 Units, including the partial exercise of the underwriters’ option to purchase 3,616,305 Over-Allotment Units, at $10.00 per Unit, generating gross proceeds of approximately $311.2 million, and incurring offering costs of approximately $17.6 million, of which approximately $10.9 million was for deferred underwriting commissions.

Each Unit consists of one Class A ordinary share and one-fifth of one redeemable warrant (“Public Warrant”). Each whole Public Warrant entitles the holder to purchase one Class A ordinary share at an exercise price of $11.50 per share, subject to adjustment (see Note 7).

Note 4—Private Placement

Simultaneously with the closing of the Initial Public Offering, the Company consummated the Private Placement of 9,223,261 Private Placement Warrants, at a price of $1.00 per Private Placement Warrant with the Sponsor, generating gross proceeds of approximately $9.2 million.

Each whole Private Placement Warrant is exercisable for one whole share of Class A ordinary shares at a price of $11.50 per share. A portion of the proceeds from the sale of the Private Placement Warrants to the Sponsor was added to the proceeds from the Initial Public Offering held in the Trust Account. If the Company does not complete a Business Combination within the Combination Period, the Private Placement Warrants will expire worthless. The Private Placement Warrants will be non-redeemable for cash and exercisable on a cashless basis so long as they are held by the Sponsor or its permitted transferees.

The Sponsor and the Company’s officers and directors agreed, subject to limited exceptions, not to transfer, assign or sell any of their Private Placement Warrants until 30 days after the completion of the initial Business Combination.

Note 5—Related Party Transactions

Founder Shares

On January 20, 2021, the Sponsor paid an aggregate of $25,000 for certain expenses on behalf of the Company in exchange for issuance of 7,187,500 Class B ordinary shares (the “Founder Shares”). On February 2, 2021, the Sponsor transferred 35,000 founder shares to each of Arno Harris, Ja-Chin Audrey Lee, Brian Goncher and Steven Berkenfeld, the Company’s independent directors. On March 22, 2021, the Company effected a share capitalization resulting in an aggregate of 7,906,250 Founder Shares issued and outstanding. The Sponsor agreed to forfeit up to an aggregate of 1,031,250 Founder Shares to the extent that the option to purchase additional units is not exercised in full by the underwriters, so that the Founder Shares will represent 20% of the Company’s issued and outstanding shares after the Initial Public Offering. On March 25, 2021, the underwriters partially exercised the over-allotment option to purchase an additional 3,616,305 Units, with the remaining portion of the over-allotment option expiring at the conclusion of the 45-day option period. As a result, an aggregate of 127,174 Founder Shares were forfeited by the Sponsor upon the expiration of the over-allotment option.

The Initial Shareholders agreed not to transfer, assign or sell any of their Founder Shares until the earlier to occur of (A) one year after the completion of the initial Business Combination and (B) subsequent to the initial Business Combination, (x) if the closing price of Class A ordinary shares equals or exceeds $12.00 per share (as adjusted for share subdivisions, share capitalizations, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the initial Business Combination, or (y) the date on which the Company completes a liquidation, merger, share exchange or other similar transaction that results in all of the Public Shareholders having the right to exchange their ordinary shares for cash, securities or other property.

Related Party Loans

On January 20, 2021, the Sponsor agreed to loan the Company up to $300,000 pursuant to a promissory note (the “Note”). The Note was non-interest bearing, unsecured and due upon the closing of the Initial Public Offering. For the period from January 13, 2021 (inception) through March 31, 2021, the Company borrowed approximately $172,000 under the Note and fully repaid the Note on March 26, 2021 (see Note 8).

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

In addition, in order to finance transaction costs in connection with a Business Combination, the Sponsor, members of the Company’s founding team or any of their affiliates may, but are not obligated to, loan the Company funds as may be required (“Working Capital Loans”). If the Company completes a Business Combination, the Company would repay the Working Capital Loans out of the proceeds of the Trust Account released to the Company. Otherwise, the Working Capital Loans would be repaid only out of funds held outside the Trust Account. In the event that a Business Combination does not close, the Company may use a portion of proceeds held outside the Trust Account to repay the Working Capital Loans but no proceeds held in the Trust Account would be used to repay the Working Capital Loans. The Working Capital Loans would either be repaid upon consummation of a Business Combination, without interest, or, at the lender’s discretion, up to $1.5 million of such Working Capital Loans may be convertible into up to 1,500,000 private placement warrants of the post Business Combination entity at a price of $1.00 per warrant. The warrants would be identical to the Private Placement Warrants. Except for the foregoing, the terms of such Working Capital Loans, if any, have not been determined and no written agreements exist with respect to such loans. As of March 31, 2021, the Company had no borrowings under the Working Capital Loans.

Administrative Services Agreement

On March 25, 2021, the Company entered into an agreement that provided that, commencing on the date that the Company’s securities were first listed on Nasdaq through the earlier of consummation of the initial Business Combination and the liquidation, the Company agreed to pay the Sponsor $10,000 per month for office space, secretarial and administrative services provided to the Company. The Company incurred approximately $10,000 in expenses in connection with such services during the period from January 13, 2021 (inception) ended March 31, 2021 as reflected in the accompanying statement of operations and included in accrued expenses—related party in connection with such services.

In addition, the Sponsor, officers and directors, or their respective affiliates will be reimbursed for any out-of-pocket expenses incurred in connection with activities on the Company’s behalf such as identifying potential target businesses and performing due diligence on suitable Business Combinations. The Company’s audit committee will review on a quarterly basis all payments that were made by the Company to the Sponsor, executive officers or directors, or their affiliates. Any such payments prior to an initial Business Combination will be made using funds held outside the Trust Account.

Note 6—Commitments and Contingencies

Registration and Shareholder Rights

The holders of the Founder Shares, Private Placement Warrants, and warrants that may be issued upon conversion of Working Capital Loans (and any Class A ordinary shares issuable upon the exercise of the Private Placement Warrants and warrants that may be issued upon conversion of Working Capital Loans) were entitled to registration rights pursuant to a registration and shareholder rights agreement signed upon the effective date of the Initial Public Offering. The holders of these securities were entitled to make up to three demands, excluding short form demands, that the Company registers such securities. In addition, the holders have certain “piggy-back” registration rights with respect to registration statements filed subsequent to the completion of the initial Business Combination. The Company will bear the expenses incurred in connection with the filing of any such registration statements.

Underwriting Agreement

The Company grant the underwriters a 45-day option from the date of this prospectus to purchase up to 4,125,000 additional Units at the Initial Public Offering price less the underwriting discounts and commissions. On March 25, 2021, the underwriters partially exercised the over-allotment option to purchase an additional 3,616,305 Units. The remaining unexercised over-allotment option will expire at the conclusion of the 45-day option period.

The underwriters were entitled to an underwriting discount of $0.20 per unit, or approximately $6.2 million in the aggregate, paid upon the closing of the Initial Public Offering. In addition, $0.35 per unit, or approximately $10.9 million in the aggregate will be payable to the underwriters for deferred underwriting commissions. The deferred fee will become payable to the underwriters from the amounts held in the Trust Account solely in the event that the Company completes a Business Combination, subject to the terms of the underwriting agreement.

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

Note 7—Shareholders’ Equity

Class A Ordinary Shares — The Company is authorized to issue 500,000,000 Class A ordinary shares with a par value of $0.0001 per share. Holders of the Company’s Class A ordinary shares are entitled to one vote for each share. At March 31, 2021, there were 31,116,305 Class A ordinary shares issued or outstanding, including 28,295,737 Class A ordinary shares subject to possible redemption.

Class B Ordinary Shares — The Company is authorized to issue 50,000,000 Class B ordinary shares with a par value of $0.0001 per share. On January 20, 2021, the Company issued 7,187,500 Class B ordinary shares. On March 22, 2021, the Company effected a share capitalization resulting in an aggregate of 7,906,250 Class B ordinary shares issued and outstanding. Of the 7,906,250 Class B ordinary shares outstanding, up to 1,031,250 Class B ordinary shares are subject to forfeiture, to the Company by the Initial Shareholders for no consideration to the extent that the underwriters’ over-allotment option is not exercised in full or in part, so that the Initial Shareholders will collectively own 20% of the Company’s issued and outstanding ordinary shares after the Initial Public Offering. On March 25, 2021, the underwriters partially exercised the over-allotment option to purchase an additional 3,616,305 Units with the remaining portion of the over-allotment option expiring at the conclusion of the 45-day option period. As a result, an aggregate of 127,174 Founder Shares were forfeited by the Sponsor upon the expiration of the over-allotment option.

Ordinary shareholders of record are entitled to one vote for each share held on all matters to be voted on by shareholders. Except as described below, holders of Class A ordinary shares and holders of Class B ordinary shares will vote together as a single class on all matters submitted to a vote of the shareholders except as required by law.

The Class B ordinary shares will automatically convert into Class A ordinary shares, which such Class A ordinary shares delivered upon conversion will not have any redemption rights or be entitled to liquidating distributions if the Company does not consummate an initial Business Combination, at the time of the initial Business Combination or earlier at the option of the holders thereof at a ratio such that the number of Class A ordinary shares issuable upon conversion of all Founder Shares will equal, in the aggregate, on an as-converted basis, 20% of the sum of (i) the total number of ordinary shares issued and outstanding upon completion of the Initial Public Offering, plus (ii) the total number of Class A ordinary shares issued or deemed issued or issuable upon conversion or exercise of any equity-linked securities or rights issued or deemed issued, by the Company in connection with or in relation to the consummation of the initial Business Combination, excluding any Class A ordinary shares or equity-linked securities exercisable for or convertible into Class A ordinary shares issued, deemed issued, or to be issued, to any seller in the initial Business Combination and any Private Placement Warrants issued to the Sponsor, its affiliates or any member of the management team upon conversion of Working Capital Loans. In no event will the Class B ordinary shares convert into Class A ordinary shares at a rate of less than one-to-one.

Preference Shares — The Company is authorized to issue 5,000,000 preference shares with a par value of $0.0001 per share. At March 31, 2021, there were no preference shares issued or outstanding.

Note 8—Derivative Warrant Liabilities

As of March 31, 2021, the Company has 6,223,261 and 9,223,261 Public Warrants and Private Placement Warrants, respectively, outstanding.

Public Warrants may only be exercised for a whole number of shares. No fractional Public Warrants will be issued upon separation of the Units and only whole Public Warrants will trade. The Public Warrants will become exercisable 30 days after the completion of a Business Combination; provided that the Company has an effective registration statement under the Securities Act covering the Class A ordinary shares issuable upon exercise of the Public Warrants and a current prospectus relating to them is available and such shares are registered, qualified or exempt from registration under the securities, or blue sky, laws of the state of residence of the holder (or the Company permit holders to exercise their warrants on a cashless basis under certain circumstances). The Company agreed that as soon as practicable, but in no event later than 20 business days after the closing of the initial Business Combination, the

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

Company will use commercially reasonable efforts to file with the SEC and have an effective registration statement covering the Class A ordinary shares issuable upon exercise of the warrants and to maintain a current prospectus relating to those Class A ordinary shares until the warrants expire or are redeemed, as specified in the warrant agreement. If a registration statement covering the Class A ordinary shares issuable upon exercise of the warrants is not effective by the 60th day after the closing of the initial Business Combination, warrant holders may, until such time as there is an effective registration statement and during any period when the Company will have failed to maintain an effective registration statement, exercise warrants on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act or another exemption. Notwithstanding the above, if the Class A ordinary shares are at the time of any exercise of a warrant not listed on a national securities exchange such that they satisfy the definition of a “covered security” under Section 18(b)(1) of the Securities Act, the Company may, at its option, require holders of Public Warrants who exercise their warrants to do so on a “cashless basis” and, in the event the Company so elects, the Company will not be required to file or maintain in effect a registration statement, and in the event the Company does not so elect, it will use commercially reasonable efforts to register or qualify the shares under applicable blue sky laws to the extent an exemption is not available.

The warrants have an exercise price of $11.50 per share, subject to adjustments, and will expire five years after the completion of a Business Combination or earlier upon redemption or liquidation. In addition, if (x) the Company issues additional Class A ordinary shares or equity-linked securities for capital raising purposes in connection with the closing of the initial Business Combination at an issue price or effective issue price of less than $9.20 per ordinary share (with such issue price or effective issue price to be determined in good faith by the board of directors and, in the case of any such issuance to the Sponsor or its affiliates, without taking into account any Founder Shares held by the Sponsor or such affiliates, as applicable, prior to such issuance) (the “Newly Issued Price”), (y) the aggregate gross. proceeds from such issuances represent more than 60% of the total equity proceeds, and interest thereon, available for the funding of the initial Business Combination on the date of the consummation of the initial Business Combination (net of redemptions), and (z) the volume weighted average trading price of the Class A ordinary shares during the 20 trading day period starting on the trading day prior to the day on which the Company consummates its initial Business Combination (such price, the “Market Value”) is below $9.20 per share, the exercise price of the warrants will be adjusted (to the nearest cent) to be equal to 115% of the higher of the Market Value and the Newly Issued Price, and the $18.00 per share redemption trigger price described under “Redemption of warrants when the price per Class A ordinary share equals or exceeds $18.00” will be adjusted (to the nearest cent) to be equal to 180% of the higher of the Market Value and the Newly Issued Price, and the $10.00 per share redemption trigger price described under the caption “Redemption of warrants when the price per Class A ordinary share equals or exceeds $10.00” will be adjusted (to the nearest cent) to be equal to the higher of the Market Value and the Newly Issued Price.

The Private Placement Warrants are identical to the Public Warrants underlying the Units sold in the Initial Public Offering, except that the Private Placement Warrants and the Class A ordinary shares issuable upon exercise of the Private Placement Warrants will not be transferable, assignable or salable until 30 days after the completion of a Business Combination, subject to certain limited exceptions. Additionally, the Private Placement Warrants will be non-redeemable so long as they are held by the initial purchasers or such purchasers’ permitted transferees. If the Private Placement Warrants are held by someone other than the Initial Shareholders or their permitted transferees, the Private Placement Warrants will be redeemable by the Company and exercisable by such holders on the same basis as the Public Warrants.

Redemption of warrants when the price per Class A ordinary share equals or exceeds $18.00: Once the warrants become exercisable, the Company may redeem the outstanding warrants (except as described herein with respect to the Private Placement Warrants):

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

The Company will not redeem the warrants as described above unless a registration statement under the Securities Act covering the Class A ordinary shares issuable upon exercise of the warrants is then effective and a current prospectus relating to those Class A ordinary shares is available throughout the 30-day redemption period.

Redemption of warrants when the price per Class A ordinary share equals or exceeds $10.00: Once the warrants become exercisable, the Company may redeem the outstanding warrants:

The “fair market value” of Class A ordinary shares for the above purpose shall mean the volume weighted average price of our Class A ordinary shares during the 10 trading days immediately following the date on which the notice of redemption is sent to the holders of warrants. In no event will the warrants be exercisable in connection with this redemption feature for more than 0.361 Class A ordinary shares per warrant (subject to adjustment).

In no event will the Company be required to net cash settle any warrant. If the Company is unable to complete a Business Combination within the Combination Period and the Company liquidates the funds held in the Trust Account, holders of warrants will not receive any of such funds with respect to their warrants, nor will they receive any distribution from the Company’s assets held outside of the Trust Account with the respect to such warrants. Accordingly, the warrants may expire worthless.

Note 9—Fair Value Measurements

The following table presents information about the Company’s assets that are measured at fair value on a recurring basis as of March 31, 2021 and indicates the fair value hierarchy of the valuation techniques that the Company utilized to determine such fair value.

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

March 31, 2021:

Transfers to/from Levels 1, 2, and 3 are recognized at the end of the reporting period. There were no transfers between levels for the period from January 13, 2021 (inception) through March 31, 2021.

Level 1 instruments include investments in money market funds and U.S. Treasury securities. The Company uses inputs such as actual trade data, benchmark yields, quoted market prices from dealers or brokers, and other similar sources to determine the fair value of its investments.

The fair value of the Public Warrants issued in connection with the Public Offering and Private Placement Warrants were initially measured at fair value using a Monte Carlo simulation model and subsequently, the fair value of the Private Placement Warrants have been estimated using a Monte Carlo simulation model each measurement date. The fair value of Public Warrants issued in connection with the Initial Public Offering have been measured based on the listed market price of such warrants, a Level 1 measurement, since March 2021. For the period from January 13, 2021 (inception) through March 31, 2021, the Company recognized a charge to the statement of operations resulting from a decrease in the fair value of liabilities of approximately $271,000 presented as change in fair value of derivative warrant liabilities on the accompanying statement of operations.

The estimated fair value of the Private Placement Warrants, and the Public Warrants prior to being separately listed and traded, is determined using Level 3 inputs. Inherent in a Monte Carlo simulation are assumptions related to expected share-price volatility, expected life, risk-free interest rate and dividend yield. The Company estimates the volatility of its ordinary share warrants based on implied volatility from the Company’s traded warrants and from historical volatility of select peer company’s ordinary shares that matches the expected remaining life of the warrants. The risk-free interest rate is based on the U.S. Treasury zero-coupon yield curve on the grant date for a maturity similar to the expected remaining life of the warrants. The expected life of the warrants is assumed to be equivalent to their remaining contractual term. The dividend rate is based on the historical rate, which the Company anticipates remaining at zero.

The following table provides quantitative information regarding Level 3 fair value measurements inputs at their measurement dates:

The change in the fair value of the derivative warrant liabilities for the period from January 13, 2021 (inception) through March 31, 2021 is summarized as follows:

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ARCLIGHT CLEAN TRANSITION CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

Note 10—Revision to Prior Period Financial Statements

During the course of preparing the quarterly report on Form 10-Q for the period from January 13, 2021 (inception) through March 31, 2021, the Company identified a misstatement in its misapplication of accounting guidance related to the Company’s warrants in the Company’s previously issued audited balance sheet dated March 25, 2021, filed on Form 8-K on March 31, 2021 (the “Post-IPO Balance Sheet”).

On April 12, 2021, the staff of the Securities and Exchange Commission (the “SEC Staff”) issued a public statement entitled “Staff Statement on Accounting and Reporting Considerations for Warrants issued by Special Purpose Acquisition Companies (“SPACs”) (the “SEC Staff Statement”). In the SEC Staff Statement, the SEC Staff expressed its view that certain terms and conditions common to SPAC warrants may require the warrants to be classified as liabilities on the SPAC’s balance sheet as opposed to equity. Since their issuance on March 21, 2021, the Company’s warrants have been accounted for as equity within the Company’s previously reported balance sheets. After discussion and evaluation, including with the Company’s independent registered public accounting firm and the Company’s audit committee, management concluded that the warrants should be presented as liabilities with subsequent fair value remeasurement.

The Warrants were reflected as a component of equity in the Post-IPO Balance Sheet as opposed to liabilities on the balance sheet, based on the Company’s application of FASB ASC Topic 815-40, Derivatives and Hedging, Contracts in Entity’s Own Equity (“ASC 815-40”). The views expressed in the SEC Staff Statement were not consistent with the Company’s historical interpretation of the specific provisions within its warrant agreement and the Company’s application of ASC 815-40 to the warrant agreement. The Company reassessed its accounting for Warrants issued on March 21, 2021, in light of the SEC Staff’s published views. Based on this reassessment, management determined that the Warrants should be classified as liabilities measured at fair value upon issuance, with subsequent changes in fair value reported in the Company Statement of Operations each reporting period.

The Company concluded that the misstatement was not material to the Post-IPO Balance Sheet and the misstatement had no material impact to any prior interim period. The effect of the revisions to the Post-IPO Balance Sheet is as follows:

Note 11—Subsequent Events

Management has evaluated subsequent events to determine if events or transactions occurring through the date the financial statement were issued. There are no such events requiring potential adjustment to or disclosure in the financial statements and the Company has concluded that all such events that would require recognition or disclosure have been recognized or disclosed.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

References to the “Company,” “our,” “us” or “we” refer to ArcLight Clean Transition Corp. II The following discussion and analysis of the Company’s financial condition and results of operations should be read in conjunction with the unaudited condensed financial statements and the notes thereto contained elsewhere in this report. Certain information contained in the discussion and analysis set forth below includes forward-looking statements that involve risks and uncertainties.

Cautionary Note Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). We have based these forward-looking statements on our current expectations and projections about future events. These forward-looking statements are subject to known and unknown risks, uncertainties and assumptions about us that may cause our actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed or implied by such forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may,” “should,” “could,” “would,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “continue,” or the negative of such terms or other similar expressions. Such statements include, but are not limited to, possible business combinations and the financing thereof, and related matters, as well as all other statements other than statements of historical fact included in this Form 10-Q. Factors that might cause or contribute to such a discrepancy include, but are not limited to, those described in our other Securities and Exchange Commission (“SEC”) filings.

Overview

We are a blank check company incorporated on January 13, 2021 as a Cayman Islands exempted company for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses or entities (the “Business Combination”), that we have not yet identified. Our sponsor is ArcLight CTC Holdings II, L.P., a Delaware limited partnership (our “Sponsor”).

Our registration statement for our initial public offering (the “Initial Public Offering”) was declared effective on March 22, 2021. On March 25, 2021, we consummated its Initial Public Offering of 31,116,305 units (the “Units” and, with respect to the Class A ordinary shares included in the Units being offered, the “Public Shares”), including the partial exercise of the underwriters’ option to purchase 3,616,305 additional Units (the “Over-Allotment Units”), at $10.00 per Unit, generating gross proceeds of approximately $311.2 million, and incurring offering costs of approximately $17.6 million, of which approximately $10.9 million was for deferred underwriting commissions.

Simultaneously with the closing of the Initial Public Offering, we consummated the private placement (“Private Placement”) of 9,223,261 warrants (each, a “Private Placement Warrant” and collectively, the “Private Placement Warrants”), at a price of $1.00 per Private Placement Warrant with the Sponsor, generating gross proceeds of approximately $9.2 million.

Upon the closing of the Initial Public Offering and the Private Placement, approximately $311.2 million of the net proceeds of the Initial Public Offering and certain of the proceeds of the Private Placement were placed in a trust account (“Trust Account”) with Continental Stock Transfer & Trust Company acting as trustee and invested in United States “government securities” within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended, or the Investment Company Act, having a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 promulgated under the Investment Company Act which invest only in direct U.S. government treasury obligations, as determined by the Company, until the earlier of: (i) the completion of a Business Combination and (ii) the distribution of the Trust Account as described below.

If we are unable to complete a Business Combination within 24 months from the closing of the Initial Public Offering, or March 25, 2023 (the “Combination Period”), we will (i) cease all operations except for the purpose of winding up; (ii) as promptly as reasonably possible but not more than ten business days thereafter, redeem the Public Shares, at a

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per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account and not previously released to us to pay its income taxes, if any (less up to $100,000 of interest to pay dissolution expenses) divided by the number of the then-outstanding Public Shares, which redemption will completely extinguish Public Shareholders’ rights as shareholders (including the right to receive further liquidation distributions, if any); and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the remaining shareholders and the board of directors, liquidate and dissolve, subject in the case of clauses (ii) and (iii), to the Company’s obligations under Cayman Islands law to provide for claims of creditors and the requirements of other applicable law.

Results of Operations

Our entire activity since inception through March 31, 2021 related to our formation, the preparation for the Initial Public Offering, and since the closing of the Initial Public Offering, the search for a prospective initial Business Combination. We have neither engaged in any operations nor generated any revenues to date. We will not generate any operating revenues until after completion of our initial Business Combination. We will generate non-operating income in the form of interest income on cash and cash equivalents. We expect to incur increased expenses as a result of being a public company (for legal, financial reporting, accounting and auditing compliance), as well as for due diligence expenses. Additionally, we recognize non-cash gains and losses within other income (expense) related to changes in recurring fair value measurement of our warrant liabilities at each reporting period.

For the period from January 13, 2021 (inception) through March 31, 2021, we had net loss of approximately $320,000 from financing costs of approximately $463,000 and approximately $128,000 in general and administrative costs, partially offset by changes in the value of derivative warrant liabilities of approximately $271,000.

Liquidity and Capital Resources

As of March 31, 2021, we had approximately $2.8 million in its operating bank account and working capital of approximately $2.4 million.

Our liquidity needs up to March 31, 2021 had been satisfied through a payment of $25,000 from the Sponsor to cover certain expenses on behalf of the Company in exchange for the issuance of the Founder Shares (as defined below), the loan under the Note from the Sponsor of approximately $172,000 to us, and the net proceeds from the consummation of the Private Placement not held in the Trust Account. The Note from the Sponsor was repaid in full on March 26, 2021. In addition, in order to finance transaction costs in connection with a Business Combination, our officers, directors and Initial Shareholders may, but are not obligated to, provide the Company Working Capital Loans. To date, there were no amounts outstanding under any Working Capital Loans.

Based on the foregoing, management believes that we will have sufficient working capital and borrowing capacity from the Sponsor or an affiliate of the Sponsor, or certain of our officers and directors to meet its needs through the earlier of the consummation of a Business Combination or one year from this filing. Over this time period, we will be using these funds for paying existing accounts payable, identifying and evaluating prospective initial Business Combination candidates, performing due diligence on prospective target businesses, paying for travel expenditures, selecting the target business to merge with or acquire, and structuring, negotiating and consummating the Business Combination.

We continue to evaluate the impact of the COVID-19 pandemic and has concluded that the specific impact is not readily determinable as of the date of the balance sheet. The financial statement does not include any adjustments that might result from the outcome of this uncertainty.

Contractual Obligations

We do not have any long-term debt obligations, capital lease obligations, operating lease obligations, purchase obligations or long-term liabilities, other than an administrative services agreement to pay our Sponsor $10,000 per month for office space, secretarial and administrative services provided to us.

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Critical Accounting Policies

This management’s discussion and analysis of our financial condition and results of operations is based on our financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America. The preparation of our financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities in our financial statements. On an ongoing basis, we evaluate our estimates and judgments, including those related to fair value of financial instruments and accrued expenses. We base our estimates on historical experience, known trends and events and various other factors that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. We have identified the following as its critical accounting policies:

Class A Ordinary shares subject to possible redemption

We account for our Class A Ordinary shares subject to possible redemption in accordance with the guidance in ASC Topic 480 “Distinguishing Liabilities from Equity.” Class A Ordinary shares subject to mandatory redemption (if any) is classified as liability instruments and are measured at fair value. Conditionally redeemable Class A Ordinary shares (including Class A Ordinary shares that features redemption rights that are either within the control of the holder or subject to redemption upon the occurrence of uncertain events not solely within the Company’s control) are classified as temporary equity. At all other times, Class A Ordinary shares are classified as shareholders’ equity. Our Class A Ordinary sharesfeature certain redemption rights that are considered to be outside of our control and subject to the occurrence of uncertain future events. Accordingly, at March 31, 2021, 28,295,737 shares of Class A Ordinary shares subject to possible redemption is presented at redemption value as temporary equity, outside of the shareholders’ equity section of the Company’s balance sheet.

Derivative Warrant Liabilities

We do not use derivative instruments to hedge exposures to cash flow, market, or foreign currency risks. We evaluate all of our financial instruments, including issued share purchase warrants, to determine if such instruments are derivatives or contain features that qualify as embedded derivatives, pursuant to ASC 480 and ASC 815-15. The classification of derivative instruments, including whether such instruments should be recorded as liabilities or as equity, is re-assessed at the end of each reporting period.

We issued an aggregate of 6,223,261 ordinary share warrants associated with Units issued to investors in our Initial Public Offering and the underwriters’ exercise of their overallotment option and we issued 9,223,261 Private Placement Warrants. All of our outstanding warrants are recognized as derivative liabilities in accordance with ASC 815-40. Accordingly, we recognize the warrant instruments as liabilities at fair value and adjust the instruments to fair value at each reporting period. The liabilities are subject to remeasurement at each balance sheet date until exercised, and any change in fair value is recognized in the Company’s statement of operations. The fair value of warrants issued in connection with the Initial Public Offering and Private Placement were initially measured at fair value using a Monte Carlo simulation model and subsequently, the fair value of the Private Placement warrants have been estimated using a Monte Carlo simulation model each measurement date. The fair value of Warrants issued in connection with our Initial Public Offering have subsequently been measured based on the listed market price of such warrants.

Net Loss Per Ordinary Share

Net income (loss) per share is computed by dividing net income by the weighted-average number of shares of ordinary shares outstanding during the period. We have not considered the effect of the warrants sold in the Public Offering and Private Placement to purchase an aggregate of 15,446,522 shares in the calculation of diluted loss per share, since the exercise of the warrants are contingent upon the occurrence of future events and the inclusion of such warrants would be anti-dilutive.

Our statement of operations includes a presentation of income (loss) per share for Redeemable Class A Ordinary shares in a manner similar to the two-class method of income (loss) per share. Net income per ordinary share, basic and diluted, for Redeemable Class A Ordinary shares is calculated by dividing the proportionate share of income or loss on marketable securities held by the Trust Account, net of applicable franchise and income taxes, by the weighted average number of ordinary shars subject to possible redemption outstanding since original issuance.

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Net loss per share, basic and diluted, for Non-Redeemable Class A and Class B Ordinary shares is calculated by dividing the net loss, adjusted for income or loss on marketable securities attributable to Redeemable Class A Ordinary shares, by the weighted average number of non-redeemable ordinary shares outstanding for the period.

Non-Redeemable Class A and Class B Ordinary shares includes Founder Shares and non-redeemable shares of ordinary shares as these shares do not have any redemption features. Non-Redeemable Class A and Class B Ordinary shares participates in the income or loss on marketable securities based on non-redeemable ordinary shares’ proportionate interest.

Recent Accounting Pronouncements

Our management does not believe that any recently issued, but not yet effective, accounting standards if currently adopted would have a material effect on the accompanying financial statements.

Off-Balance Sheet Arrangements

As of March 31, 2021, we did not have any off-balance sheet arrangements as defined in Item 303(a)(4)(ii) of Regulation S-K.

JOBS Act

The Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”) contains provisions that, among other things, relax certain reporting requirements for qualifying public companies. We qualify as an “emerging growth company” and under the JOBS Act are allowed to comply with new or revised accounting pronouncements based on the effective date for private (not publicly traded) companies. We are electing to delay the adoption of new or revised accounting standards, and as a result, we may not comply with new or revised accounting standards on the relevant dates on which adoption of such standards is required for non-emerging growth companies. As a result, the financial statements may not be comparable to companies that comply with new or revised accounting pronouncements as of public company effective dates.

Additionally, we are in the process of evaluating the benefits of relying on the other reduced reporting requirements provided by the JOBS Act. Subject to certain conditions set forth in the JOBS Act, if, as an “emerging growth company,” we choose to rely on such exemptions we may not be required to, among other things, (i) provide an auditor’s attestation report on our system of internal controls over financial reporting pursuant to Section 404, (ii) provide all of the compensation disclosure that may be required of non-emerging growth public companies under the Dodd-Frank Wall Street Reform and Consumer Protection Act, (iii) comply with any requirement that may be adopted by the PCAOB regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information about the audit and the financial statements (auditor discussion and analysis) and (iv) disclose certain executive compensation related items such as the correlation between executive compensation and performance and comparisons of the CEO’s compensation to median employee compensation. These exemptions will apply for a period of five years following the completion of our Initial Public Offering or until we are no longer an “emerging growth company,” whichever is earlier.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We are a smaller reporting company as defined by Rule 12b-2 of the Exchange Act and are not required to provide the information otherwise required under this item.

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Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of our management, including our principal executive officer and principal financial and accounting officer, we conducted an evaluation of the effectiveness of our disclosure controls and procedures as of the end of the fiscal quarter ended March 31, 2021, as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act. Based on this evaluation, our chief executive officer and chief financial officer have concluded that during the period covered by this report, our disclosure controls and procedures were not effective as of March 31, 2021.

Our internal control over financial reporting did not result in the proper accounting classification of certain of the Warrants we issued in March 2021 which, due to its impact on our financial statements, we determined to be a material weakness. This mistake in classification was brought to our attention only when the SEC issued a Staff Statement on Accounting and Reporting Considerations for Warrants Issued by Special Purpose Acquisition Companies (“SPACs”) dated April 12, 2021 (the “SEC Statement”). The SEC Statement addresses certain accounting and reporting considerations related to warrants of a kind similar to those we issued at the time of our initial public offering in March 2021.

Changes in Internal Control over Financial Reporting

There was no change in our internal control over financial reporting that occurred during the period from January 13, 2021 (inception) through March 31, 2021, covered by this Quarterly Report on Form 10-Q that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting, other than the remediation steps taken to address the material weakness. Management has implemented remediation steps to address the material weakness and to improve our internal control over financial reporting. Specifically, we expanded and improved our review process for complex securities and related accounting standards. We plan to further improve this process by enhancing access to accounting literature, identification of third-party professionals with whom to consult regarding complex accounting applications and consideration of additional staff with the requisite experience and training to supplement existing accounting professionals.

PART II – OTHER INFORMATION

Item 1. Legal Proceedings

None.

Item 1A. Risk Factors.

There have been no material changes from the risk factors previously disclosed in the Company’s most recent prospectus for the Initial Public Offering as filed with the SEC on March 22, 2021.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds from Registered Securities

Unregistered Sales

On January 3, 2021, our Sponsor paid an aggregate of $25,000 for certain expenses on our behalf in exchange for issuance of 7,187,500 Class B ordinary shares (the “Founder Shares”). On February 2, 2021, our Sponsor transferred 35,000 Founder Shares to each of Arno Harris, Ja-Chin Audrey Lee, Brian Goncher and Steven Berkenfeld, our independent director nominees. On March 22, 2021, we effected a share capitalization resulting in an aggregate of 7,906,250 Founder Shares issued and outstanding. Up to 1,031,250 Founder Shares were subject to forfeiture by the Sponsor, to the extent that the option to purchase additional units was not exercised in full by the underwriters, so that the Founder Shares would represent 20% of the Company’s issued and outstanding shares after the Initial Public Offering. The underwriters partially exercised their over-allotment option on March 22, 2021, with the remaining portion of the over-allotment option expiring at the conclusion of the 45-day option period. As a result, an aggregate of 127,174 Founder Shares were forfeited by the Sponsor upon the expiration of the over-allotment option.

No underwriting discounts or commissions were paid with respect to such sales.

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Use of Proceeds

In connection with the Initial Public Offering and the underwriters of their over-allotment option, we incurred offering costs of approximately $15.9 million (including deferred underwriting commissions of approximately $9.8 million). Other incurred offering costs consisted principally of preparation fees related to the Initial Public Offering. After deducting the underwriting discounts and commissions (excluding the deferred portion, which amount will be payable upon consummation of the Initial Business Combination, if consummated) and the Initial Public Offering expenses, $277.5 million of the net proceeds from our Initial Public Offering and certain of the proceeds from the private placement of the Private Placement Warrants (or $10.00 per Unit sold in the Initial Public Offering) was placed in the Trust Account. The net proceeds of the Initial Public Offering and certain proceeds from the sale of the Private Placement Warrants are held in the Trust Account and invested as described elsewhere in this Quarterly Report on Form 10-Q.

There has been no material change in the planned use of the proceeds from the Initial Public Offering and Private Placement as is described in the Company’s final prospectus related to the Initial Public Offering.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item  5. Other Information

None.

Item 6. Exhibits.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized on this 21st day of May, 2021.

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EXHIBIT 31.1

CERTIFICATION

PURSUANT TO RULES 13a-14(a) AND 15d-14(a)

UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, John F. Erhard, certify that:

EXHIBIT 31.2

CERTIFICATION

PURSUANT TO RULES 13a-14(a) AND 15d-14(a)

UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Marco F. Gatti, certify that:

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of ArcLight Clean Transition Corp. II (the “Company”) on Form 10-Q for the three months ended March 31, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, John F. Erhard, President, Chief Executive Officer and Director of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

Date: May 21, 2021

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of ArcLight Clean Transition Corp. II(the “Company”) on Form 10-Q for the three months ended March 31, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Marco F. Gatti, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

Date: May 21, 2021