Exhibit 99.4

CLEANTECH ACQUISITION CORP.

INDEX TO FINANCIAL STATEMENT

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of

CleanTech Acquisition Corp.

Opinion on the Financial Statement

We have audited the accompanying balance sheet of CleanTech Acquisition Corp. (the “Company”) as of July 19, 2021, and the related notes (collectively referred to as the “financial statement”). In our opinion, the financial statement presents fairly, in all material respects, the financial position of the Company as of July 19, 2021, in conformity with accounting principles generally accepted in the United States of America.

Restatement of Financial Statement

As discussed in Note 2 to the financial statement, the July 19, 2021 financial statement has been restated to correct certain misstatements.

Going Concern

The accompanying financial statements have been prepared assuming that the Company will continue as a going concern. As discussed in Note 1 to the financial statements, if the Company is unable to raise additional funds to alleviate liquidity needs and complete a business combination by July 19, 2022 then the Company will cease all operations except for the purpose of liquidating. The date for mandatory liquidation and subsequent dissolution raise substantial doubt about the Company’s ability to continue as a going concern. Management’s plans in regard to these matters are also described in Note 1. The financial statements do not include any adjustments that might result from the outcome of this uncertainty.

Basis for Opinion

This financial statement is the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statement based on our audit. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. 

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statement is free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audit we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audit included performing procedures to assess the risks of material misstatement of the financial statement, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statement. Our audit also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statement. We believe that our audit provides a reasonable basis for our opinion.

/s/ WithumSmith+Brown, PC

We have served as the Company’s auditor since 2021.

New York, New York

July 23, 2021, except for the effects of the restatement disclosed in Notes 1, 2, 3, 10, and 11, as to which the date is March 29, 2022

CLEANTECH ACQUISITION CORP.

BALANCE SHEET
JULY 19, 2021 (AS RESTATED)⁽¹⁾

⁽¹⁾ As restated due to the review of accounting for complex financial instruments and change in fair value of warrant liabilities (see Note 2).

⁽²⁾ Includes up to 562,500 shares of common stock subject to forfeiture if the over-allotment option is not exercised in full or in part by the underwriter (see Note 6).

The accompanying notes are an integral part of the financial statement.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

NOTE 1. DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS

CleanTech Acquisition Corp. (formerly known as “Chardan Healthcare Acquisition 5 Corp.”) (the “Company”) is a blank check company incorporated in Delaware on June 18, 2020. The Company was formed for the purpose of entering into a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses (a “Business Combination”).

The Company is not limited to a particular industry or geographic region for purposes of consummating a Business Combination. The Company is an early stage and emerging growth company and, as such, the Company is subject to all of the risks associated with early stage and emerging growth companies.

As of July 19, 2021, the Company had not yet commenced any operations. All activity for the period from June 18, 2020 (inception) through July 19, 2021 relates to the Company’s formation and the initial public offering (“Initial Public Offering”) described below, and, subsequent to the Initial Public Offering, identifying a target company for a Business Combination. The Company will not generate any operating revenues until after 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 registration statement for the Company’s Initial Public Offering was declared effective on July 14, 2021. On July 19, 2021, the Company consummated the Initial Public Offering of 15,000,000 units (the “Units” and, with respect to the shares of common stock included in the Units sold, the “Public Shares”), at $10.00 per Unit, generating gross proceeds of $150,000,000, which is described in Note 4.

Simultaneously with the closing of the Initial Public Offering, the Company consummated the sale of 4,333,333 warrants at a price of $1.00 per Private Placement Warrant in a private placement to CleanTech Sponsor (the “Sponsor”), and 2,166,667 warrants (together, the “Private Placement Warrants”) at a price of $1.00 per Private Placement Warrant in a private placement to CleanTech Investments, an affiliate of the Sponsor (the “Co-sponsor”), generating gross proceeds of $6,500,000, which is described in Note 5.

Warrant issuance costs amounted to $3,693,582 consisting of $3,000,000 of underwriting fees, $227,300 for the fair value of the underwriters’ over-allotment option to purchase 2,250,000 additional Units at the Initial Public Offering price and $466,282 of other offering costs.

Following the closing of the Initial Public Offering on July 19, 2021, an amount of $152,000,000 from the net proceeds of the sale of the Units in the Initial Public Offering and the sale of the Private Placement Warrants was placed in a trust account (the “Trust Account”) and will be invested only in U.S. government treasury obligations with maturities of 183 days or less or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act which invest only in direct U.S. government treasury obligations, until the earlier of: (i) the completion of a Business Combination and (ii) the distribution of the funds held in the Trust Account, as described below.

A total of $10.10 per unit (whether or not the underwriters’ over-allotment option is exercised in full) of the net proceeds from the Initial Public Offering and the sale of the private warrants described in the Company’s prospectus will be placed in a trust account in the United States at J.P. Morgan, maintained by Continental Stock Transfer & Trust Company acting as trustee and will be invested only in U.S. government treasury bills, notes and bonds with a maturity of 183 days or less or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act and which invest solely in U.S. Treasuries. Except for all interest income that may be released to us to pay our tax obligations, as discussed below, none of the funds held in the trust account will be released from the trust account until the earlier of: (i) the consummation of our initial business combination within 12 months (or up to 18 months, as applicable) from the closing of the Initial Public Offering and (ii) a redemption to public stockholders prior to any voluntary winding-up in the event we do not consummate our initial business combination within the applicable period.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Initial Public Offering and the sale of the Private Placement Warrants, although substantially all of the net proceeds are intended to be applied generally toward consummating a Business Combination. There is no assurance that the Company will be able to complete a Business Combination successfully. The Company must complete a Business Combination with one or more target businesses that together have an aggregate fair market value of at least 80% of the value of the Trust Account (as defined below) (excluding the deferred underwriting commissions and taxes payable on income earned on the Trust Account) at the time of the agreement to enter into an initial Business Combination. 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, after signing a definitive agreement for an Initial Business Combination, will either (i) seek stockholder approval of the Initial Business Combination at a meeting called for such purpose in connection with which stockholders may seek to redeem their shares, regardless of whether they vote for or against the Initial Business Combination, for cash equal to their pro rata share of the aggregate amount then on deposit in the Trust Account as of two business days prior to the consummation of the Initial Business Combination, including interest but less taxes payable, or (ii) provide stockholders with the opportunity to sell their Public Shares to the Company by means of a tender offer (and thereby avoid the need for a stockholder vote) for an amount in cash equal to their pro rata share of the aggregate amount then on deposit in the Trust Account as of two business days prior to the consummation of the Initial Business Combination, including interest but less taxes payable. The decision as to whether the Company will seek stockholder approval of the Initial Business Combination or will allow stockholders to sell their Public Shares in a tender offer will be made by the Company, solely in its discretion, and will be based on a variety of factors such as the timing of the transaction and whether the terms of the transaction would otherwise require the Company to seek stockholder approval, unless a vote is required by law or under NASDAQ rules. If the Company seeks stockholder approval, it will complete its Initial Business Combination only if a majority of the outstanding shares of common stock voted are voted in favor of the Initial Business Combination. However, in no event will the Company redeem its Public Shares in an amount that would cause its net tangible assets to be less than $5,000,001 either immediately prior to or upon consummation of the Initial Business Combination. In such case, the Company would not proceed with the redemption of its Public Shares and the related Initial Business Combination, and instead may search for an alternate Initial Business Combination.

If the Company seeks stockholder approval of the initial Business Combination and the Company does not conduct redemptions in connection with the Business Combination pursuant to the tender offer rules, the certificate of incorporation provides that a public stockholder, individually or together with any affiliate of such stockholder or any other person with whom such stockholder is acting in concert or as a “group” (as defined under Section 13 of the Exchange Act), will be restricted from seeking redemption rights with respect to more than an aggregate of 20% of the shares sold in the initial public offering. Furthermore, in order for a public stockholder to have his, her or its shares redeemed for cash in connection with any proposed Business Combination, the Company may require that the public stockholders vote either in favor of or against a proposed Business Combination. If required to vote pursuant to the procedures specified in the proxy statement to stockholders relating to the Business Combination, and a public stockholder fails to vote in favor of or against the proposed Business Combination, whether that stockholder abstains from the vote or simply does not vote, that stockholder would not be able to have his, her or its shares of common stock redeemed to cash in connection with such Business Combination.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

The initial stockholders have agreed to waive their redemption rights with respect to any shares they own in connection with the consummation of the initial Business Combination, including their founder shares and public shares that they have purchased during or after the offering, if any. In addition, the initial stockholders have agreed to waive their rights to liquidating distributions with respect to its founder shares if the Company fails to consummate the initial Business Combination within 12 months (or up to 18 months, as applicable) from the closing of the offering. However, if the initial stockholders acquire public shares in or after the Initial Public Offering, they will be entitled to receive liquidating distributions with respect to such public shares if the Company fails to consummate the initial Business Combination within the required time period.

If the Company does not complete a business combination within 12 months (or up to 18 months, as applicable) from the closing this offering (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 100% of the outstanding public shares and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the remaining stockholders and the board of directors, dissolve and liquidate, subject (in the case of (ii) and (iii) above) to the obligations under Delaware law to provide for claims of creditors and the requirements of other applicable law. There will be no redemption rights or liquidating distributions with respect to the warrants, which will expire worthless if the Company fails to complete the Business Combination within the time period.

In order to protect the amounts in the Trust Account, the Sponsor has 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 discussed entering into a transaction agreement, reduce the amount of funds in the Trust Account to below (i) $10.10 per Public Share or (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 $10.10 per Public 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”). 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 all 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.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

Going Concern Consideration

As of July 19, 2021, the Company had $1,525,000 in cash held outside of the Trust Account and working capital of $1,016,552. In connection with the Company’s assessment of going concern considerations in accordance with Financial Accounting Standard Board’s (“FASB”) Accounting Standards Update (“ASU”) 2014-15, “Disclosures of Uncertainties about an Entity’s Ability to Continue as a Going Concern,” management has determined that the date for mandatory liquidation and dissolution raise substantial doubt about the Company’s ability to continue as a going concern through July 19, 2022, the scheduled liquidation date of the Company if it does not complete a Business Combination prior to such date. Management plans to address this uncertainty through the Business Combination as discussed above. There is no assurance that the Company's plans to consummate the Business Combination will be successful or successful within the Combination Period. These financial statements do not include any adjustments relating to the recovery of the recorded assets or the classification of the liabilities that might be necessary should the Company be unable to continue as a going concern. 

Risks and Uncertainties

Management continues to evaluate the impact of the COVID-19 pandemic on the industry and has concluded that while it is reasonably possible that the virus could have a negative effect on the Company’s financial position, results of its operations, and/or search for a target company, the specific impact is not readily determinable as of the date of this financial statement. The financial statement does not include any adjustments that might result from the outcome of this uncertainty.

NOTE 2. RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENT

In accordance with SEC and its staff’s guidance on redeemable equity instruments, which has been codified in Accounting Standards Codification (“ASC”) 480-10-S99, redemption provisions not solely within the control of the Company require common stock subject to redemption to be classified outside of permanent equity. The Company had previously classified a portion of the common stock in permanent equity. Although the Company did not specify a maximum redemption threshold, its charter provides that currently, the Company will not redeem its public shares in an amount that would cause its net tangible assets to be less than $5,000,001. The Company restated its financial statement to classify all common stock as temporary equity and any related impact, as the threshold in its charter would not change the nature of the underlying shares as redeemable and thus would be required to be disclosed outside of permanent equity.

The Company also concluded that a portion of the proceeds from the Initial Public Offering and the sale of the Over-Allotment Units was not correctly allocated to the rights that are included as part of the Units sold, which led to a misstatement as related to the fair value of the warrant liabilities and a change to the transaction costs related to the warrants issued in to the Initial Public Offering.

In addition, the Company granted the underwriters a 45-day option to purchase up to 2,250,000 additional Units to cover over-allotments at the initial public offering price, less the underwriting discounts and commissions (see Note 7). The Company concluded that the underwriters’ over-allotment option to purchase up to 2,250,000 additional Units should have been classified as a liability pursuant to ASC 480.

The reclassification of amounts from permanent equity to temporary equity result in non-cash financial statement corrections and will have no impact on the Company’s current or previously reported cash position, operating expenses or total operating, investing or financing cash flows.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

The following tables summarize the effect of the restatement on each financial statement line item as of the dates, and for the periods, indicated:

The Company also restated Note 10 Fair Value Measurements by adding the disclosure on the significant inputs to the Black Scholes Option Pricing Model for the fair value of the over-allotment option, and including the fair value of the over-allotment option in the fair value hierarchy and summary of the changes in the fair value of the Company’s Level 3 financial instruments.

NOTE 3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying financial statement is presented in conformity with accounting principles generally accepted in the United States of America (“GAAP”) and pursuant to the rules and regulations of the SEC.

Emerging Growth Company

The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act of 1933, as amended (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, reduced disclosure obligations regarding executive compensation in its periodic 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 a 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 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 which is neither an emerging growth company nor an emerging growth company which has opted out of using the extended transition period difficult or impossible because of the potential differences in accounting standards used.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

Use of Estimates

The preparation of the financial statement in conformity with 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 and the reported amounts of expenses during the reporting periods.

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. One of the more significant accounting estimates included in this financial statement is the determination of the fair value of the warrant liabilities. Accordingly, the actual results could differ 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. The Company did not have any cash equivalents as of July 19, 2021.

Cash Held in Trust Account

As of July 19, 2021, the Company had $152,000,000 in cash held in the Trust Account.

Common Stock Subject to Possible Redemption (As Restated, see Note 2)

The Company accounts for its common stock subject to possible redemption in accordance with the guidance in ASC Topic 480, Distinguishing Liabilities from Equity. Common stock subject to mandatory redemption (if any) are classified as liability instruments and are measured at fair value. Conditionally redeemable common stock (including common stock that feature redemption rights that are either within the control of the holder or subject to redemption upon occurrence of uncertain events not solely within the Company’s control) are classified as temporary equity. At all other times, common stock is classified as stockholders’ deficit. The Company’s common stock feature certain redemption rights that are considered to be outside of the Company’s control and subject to the occurrence of uncertain future events. As of July 19, 2021, 15,000,000 shares of common stock subject to possible redemption are presented as temporary equity, outside of the stockholders’ deficit section of the Company’s balance sheet. Effective with the closing of the Initial Public Offering, the Company recognized the accretion from the initial book value to redemption amount, which resulted in charges against additional paid-in capital (to the extent available) and accumulated deficit.

The Company recognizes changes in redemption value immediately as they occur and adjusts the carrying value of redeemable common stock to equal the redemption value at the end of each reporting period. This method would view the end of the reporting period as if it were also the redemption date for the security. Increases or decreases in the carrying amount of redeemable common stock are affected by charges against additional paid in capital and accumulated deficit.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

As of July 19, 2021, the common stock subject to possible redemption reflected in the accompanying balance sheet is reconciled in the following table:

Offering Costs associated with the Initial Public Offering (As Restated, see Note 2)

The Company complies with the requirements of ASC 340-10-S99-1 and SEC Staff Accounting Bulletin Topic 5A - Expenses of Offering. Offering costs consist principally of professional and registration fees incurred through the balance sheet date that are related to the Initial Public Offering. Offering costs directly attributable to the issuance of an equity contract to be classified in equity are recorded as a reduction in equity. Offering costs for equity contracts that are classified as assets and liabilities are expensed immediately. The Company incurred offering costs amounting to $3,693,582 as a result of the Initial Public Offering (consisting of a $3,000,000 underwriting discount, $227,300 for the fair value of the underwriters’ over-allotment option to purchase 2,250,000 additional Units at the Initial Public Offering price, and $466,282 of other offering costs). The Company recorded $3,461,806 of offering costs as a reduction of temporary equity in connection with the redeemable common stock included in the Units. The Company recorded $83,812 of offering costs as a reduction of permanent equity in connection with the Rights, as defined in Note 4, classified as equity instruments. The Company immediately expensed $147,964 of offering costs in connection with the Public Warrants and Private Placement Warrants that were classified as liabilities.

Derivative Warrant Liabilities

The Company accounts for warrants as either equity-classified or liability-classified instruments based on an assessment of the warrant’s specific terms and applicable authoritative guidance in ASC 480, Distinguishing Liabilities from Equity (“ASC 480”), and ASC 815, Derivatives and Hedging (“ASC 815”). The assessment considers whether the warrants are freestanding financial instruments pursuant to ASC 480, meet the definition of a liability pursuant to ASC 480, and whether the warrants meet all of the requirements for equity classification under ASC 815, including whether the warrants are indexed to the Company’s own common stock, among other conditions for equity classification. This assessment, which requires the use of professional judgment, is conducted at the time of warrant issuance and as of each subsequent quarterly period end date while the warrants are outstanding.

For issued or modified warrants that meet all of the criteria for equity classification, the warrants are required to be recorded as a component of additional paid-in capital at the time of issuance. For issued or modified warrants that do not meet all the criteria for equity classification, the warrants are required to be recorded at their initial fair value on the date of issuance, and each balance sheet date thereafter. Changes in the estimated fair value of the warrants are recognized as a non-cash gain or loss on the statements of operations. The fair value of the Private Placement Warrants was estimated using a Black-Scholes Option Pricing Model (see Note 10).

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

The Company evaluates its financial instruments to determine if such instruments are derivatives or contain features that qualify as embedded derivatives in accordance with ASC Topic 815, Derivatives and Hedging. For derivative financial instruments that are accounted for as liabilities, the derivative instrument is initially recorded at its fair value on the grant date and is then re-valued at each reporting date, with changes in the fair value reported in the statements of operations. The classification of derivative instruments, including whether such instruments should be recorded as liabilities or as equity, is evaluated at the end of each reporting period. Derivative liabilities are classified in the balance sheet as current or non-current based on whether or not net-cash settlement or conversion of the instrument could be required within 12 months of the balance sheet date.

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 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 July 19, 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. The Company is subject to income tax examinations by major taxing authorities since inception. The Company has no expectation of a change in the above for a period of time within one year after the date that the financial statement is issued.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist of a cash account in a financial institution, which, at times, may exceed the Federal Depository Insurance Corporation limit of $250,000. The Company has not experienced losses on this account and management believes the Company is not exposed to significant risks on such account.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

Fair Value of Financial Instruments

The Company applies ASC Topic 820, Fair Value Measurement (“ASC 820”), which establishes a framework for measuring fair value and clarifies the definition of fair value within that framework. ASC 820 defines fair value as an exit price, which is the price that would be received for an asset or paid to transfer a liability in the Company’s principal or most advantageous market in an orderly transaction between market participants on the measurement date. The fair value hierarchy established in ASC 820 generally requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Observable inputs reflect the assumptions that market participants would use in pricing the asset or liability and are developed based on market data obtained from sources independent of the reporting entity. Unobservable inputs reflect the entity’s own assumptions based on market data and the entity’s judgments about the assumptions that market participants would use in pricing the asset or liability and are to be developed based on the best information available in the circumstances.

The carrying amounts reflected in the balance sheet for cash, prepaid expenses and accrued offering costs approximate fair value due to their short-term nature.

Level 1 — Assets and liabilities with unadjusted, quoted prices listed on active market exchanges. Inputs to the fair value measurement are observable inputs, such as quoted prices in active markets for identical assets or liabilities.

Level 2 — Inputs to the fair value measurement are determined using prices for recently traded assets and liabilities with similar underlying terms, as well as direct or indirect observable inputs, such as interest rates and yield curves that are observable at commonly quoted intervals.

Level 3 — Inputs to the fair value measurement are unobservable inputs, such as estimates, assumptions, and valuation techniques when little or no market data exists for the assets or liabilities.

Recent Accounting Standards

In August 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-06, Debt — Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging —Contracts in Entity’s Own Equity (Subtopic 815-40) (“ASU 2020-06”) to simplify accounting for certain financial instruments. ASU 2020-06 eliminates the current models that require separation of beneficial conversion and cash conversion features from convertible instruments and simplifies the derivative scope exception guidance pertaining to equity classification of contracts in an entity’s own equity. The new standard also introduces additional disclosures for convertible debt and freestanding instruments that are indexed to and settled in an entity’s own equity. ASU 2020-06 amends the diluted earnings per share guidance, including the requirement to use the if converted method for all convertible instruments. ASU 2020-06 is effective for the Company on January 1, 2024 and should be applied on a full or modified retrospective basis, with early adoption permitted beginning on January 1, 2021. The Company adopted ASU 2020-06 effective January 1, 2021 using the modified retrospective method of transition. The adoption of ASU 2020-06 did not have a material impact on the financial statement for the period ended July 19, 2021.

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

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

NOTE 4. INITIAL PUBLIC OFFERING

Pursuant to the Initial Public Offering which was consummated on July 19, 2021, the Company sold 15,000,000 Units at a purchase price of $10.00 per Unit. Each Unit consists of one share of the Company’s common stock, $0.0001 par value, one right entitling the holder thereof to receive one-twentieth (1/20) of one share common stock upon the consummation of an initial business combination (the “Rights”), and one-half of one redeemable warrant (“Redeemable Warrant”). Each whole Redeemable Warrant is exercisable to purchase one share of common stock and only whole warrants are exercisable. No fractional warrants will be issued upon separation of the Units and only whole warrants will trade. The Redeemable Warrants will become exercisable on the later of 30 days after the completion of the Initial Business Combination or 12 months from the closing of the Initial Public Offering. Each whole Redeemable Warrant entitles the holder to purchase one share of common stock at an exercise price of $11.50 (see Note 8).

NOTE 5. PRIVATE PLACEMENT

Simultaneously with the closing of the Initial Public Offering, the Sponsor and Co-Sponsor purchased an aggregate of 6,500,000 Private Warrants at a price of $1.00 per Private Placement Warrant ($6,500,000 in the aggregate). Each Private Placement Warrant is exercisable to purchase one share of common stock at a price of $11.50 per share. The proceeds from the sale of the Private Warrants were added to the net 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 proceeds from the sale of the Private Warrants will be used to fund the redemption of the Public Shares (subject to the requirements of applicable law) and the Private Placement Warrants will expire worthless.

NOTE 6. RELATED PARTY TRANSACTIONS

Founder Shares

In July 2020, the Sponsor was issued 5,000,000 shares of common stock (the “Founder Shares”) for an aggregate price of $25,000. In February 2021, the Company effected a 1.4375-for-1 stock split of its issued and outstanding shares of common stock, resulting in an aggregate of 4,312,500 shares of common stock issued and outstanding. The Founder Shares include an aggregate of up to 562,500 shares of common stock subject to forfeiture by the Sponsor to the extent that the underwriters’ over-allotment option is not exercised in full or in part, so that the Sponsor will own, on an as-converted basis, 20% of the Company’s issued and outstanding shares after the Initial Public Offering.

On February 16, 2021, CleanTech Sponsor paid $16,667 to the Company, which amount was paid to CleanTech Investments LLC to cancel 4,791,667 of its Founder Shares that it previously held and immediately thereafter the Company issued 4,791,667 Founders Shares to CleanTech Sponsor. As a result, CleanTech Sponsor owns 4,791,667 Founders Shares and CleanTech Investments LLC owns 2,395,833 Founder Shares. CleanTech Sponsor and CleanTech Investments LLC will both participate in the purchase of the Private Warrants based their pro rata ownership of Founder Shares.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

In June 2021, CleanTech Sponsor and CleanTech Investments forfeited for no consideration 1,916,667 founder shares and 958,333 founder shares, respectively, which the Company cancelled, resulting in a decrease in the total number of founder shares outstanding from 7,187,500 shares to 4,312,500 shares. As a result, CleanTech Sponsor owns 2,875,000 founder shares and CleanTech Investments owns 1,437,500 founder shares. The founder shares include an aggregate of up to 562,500 shares that are subject to forfeiture to the extent that the underwriters’ over-allotment option is not exercised in full or in part. All share and per-share amounts have been retroactively restated to reflect the share forfeiture.

Promissory Notes—Related Party

On March 1, 2021, the Company issued an unsecured promissory note to the Sponsor (the “Promissory Note”), pursuant to which the Company could borrow up to an aggregate of up to $250,000 to cover expenses related to the Initial Public Offering. The Promissory Note was non-interest bearing and is payable on the earlier of Promptly after the date on which the Maker consummates an initial public offering of its securities or (ii) the completion of the Initial Public Offering. The outstanding balance under the Promissory Note was $188,302 on July 19, 2021.

Administrative Support Agreement

The Company entered into an agreement, commencing on July 14, 2021, to pay an affiliate of the Sponsor a total of $10,000 per month for administrative, financial and support services. Upon the completion of an initial Business Combination, the Company will cease paying these monthly fees.

Related Party Loans

In addition, in order to finance transaction costs in connection with an intended initial business combination, the Company’s Sponsor, Co-Sponsor, or an affiliate of the Sponsor or the officers and directors may, but are not obligated to, loan the Company funds as may be required. If the Company consummates the initial business combination, it would repay such loaned amounts. The notes would either be paid upon consummation of the Company’s initial business combination, without interest, or, at the lender’s discretion, up to $500,000 of the notes may be converted upon consummation of the business combination into additional private warrants to purchase shares of common stock at a conversion price of $1.00 per private warrant (which, for example, would result in the holders being issued private warrants to purchase 500,000 shares of common stock if $500,000 of notes were so converted). Such private warrants will be identical to the private warrants to be issued at the closing of the initial public offering. Loans made by Chardan Capital Markets, LLC or any of its related persons will not be convertible into private warrants, and Chardan Capital Markets, LLC and its related persons will have no recourse with respect to their ability to convert their loans into private warrants. As of July 19, 2021, there were no borrowings under these loans.

Related Party Extension Loans

The Company may extend the period of time to consummate a Business Combination up to two times, each by an additional three months (for a total of 18 months to complete a Business Combination). In order to extend the time available for the Company to consummate a Business Combination, without the need for a separate stockholder vote, is for the Company’s initial stockholders or their affiliates or designees, upon five days’ advance notice prior to the application deadline, to deposit into the trust account $1,500,000 or $1,725,000 if the underwriters’ over-allotment option is exercised in full ($0.10 per public share, or an aggregate of $3,000,000 (or $3,450,000 if the over-allotment option is exercised in full) if extended for each of the full three months), on or prior to the date of the application deadline. In the event that the stockholders, or affiliates or designees, elect to extend the time to complete the Company’s initial business combination and deposit the applicable amount of money into trust, the initial stockholders will receive a non-interest bearing, unsecured promissory note equal to the amount of any such deposit that will not be repaid in the event that the Company is unable to close a business combination unless there are funds available outside the trust account to do so. Such note would be paid upon consummation of the Company’s initial business combination.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

NOTE 7. COMMITMENTS

Registration and Stockholder Rights Agreement

Pursuit to a registration rights agreement entered into on July 14, 2021, the holders of insider shares issued and outstanding, as well as the holders of the private warrants (and all underlying securities), will be entitled to registration and stockholder rights pursuant to an agreement to be signed prior to or on the effective date of the initial public offering. The holders of a majority of these securities are entitled to make up to two demands that the Company registers such securities. The holders of the majority of the insider shares can elect to exercise these registration rights at any time commencing three months prior to the date on which these shares of common stock are to be released from escrow. In addition, the holders have certain “piggy-back” registration rights with respect to registration statements filed subsequent to the consummation of a business combination. The Company will bear the expenses incurred in connection with the filing of any such registration statements.

Underwriting Agreement

The Company granted the underwriters a 45-day option from the date of the Initial Public Offering to purchase up to 2,250,000 additional Units to cover over-allotments, if any, at the Initial Public Offering price less the underwriting discounts and commissions.

The underwriters were entitled to a cash underwriting discount of $0.20 per Unit, or $3,000,000 in the aggregate (or $3,450,000 in the aggregate if the underwriters’ over-allotment option is exercised in full), payable upon the closing of the over-allotments.

Business Combination Marketing Agreement

The Company intends to engage Chardan Capital Markets, LLC as an advisor in connection with the initial business combination to assist the Company in holding meetings with the stockholders to discuss the potential business combination and the target business’s attributes, introduce the Company to potential investors that are interested in purchasing the securities in connection with the potential business combination, assist the Company in obtaining stockholder approval for the business combination and assist the Company with press releases and public filings in connection with the business combination. The Company will pay Chardan Capital Markets, LLC a marketing fee for such services upon the consummation of the initial business combination in an amount equal to, in the aggregate, 3.5% of the gross proceeds of the initial public offering, including any proceeds from the full or partial exercise of the underwriters’ over-allotment option. As a result, Chardan Capital Markets, LLC will not be entitled to such fee unless the Company consummates the initial business combination. A copy of the form of business combination marketing agreement has been filed as an exhibit to the registration statement of which the Company’s prospectus forms a part.

NOTE 8. WARRANTS

As of July 19, 2021, there were 14,000,000 (including 7,500,000 Public Warrants and 6,500,000 Private Placement Warrants) outstanding.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

Each whole public warrant entitles the registered holder to purchase one share of common stock at a price of $11.50 per whole share, subject to adjustment as described below, at any time commencing on the later of one year after the closing of the initial public offering or the consummation of an initial Business Combination. However, no public warrants will be exercisable for cash unless the Company has an effective and current registration statement covering the shares of common stock issuable upon exercise of the warrants and a current prospectus relating to such shares of common stock. Notwithstanding the foregoing, if a registration statement covering the shares of common stock issuable upon exercise of the public warrants is not effective within 120 days from 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 shall have failed to maintain an effective registration statement, exercise warrants on a cashless basis pursuant to an available exemption from registration under the Securities Act. The warrants will expire five years from the closing of the initial Business Combination at 5:00 p.m., New York City time.

The private warrants will be identical to the public warrants underlying the units being offered by the Company’s prospectus except that (i) each private warrant is exercisable for one share of common stock at an exercise price of $11.50 per share, and (ii) such private warrants will be exercisable for cash (even if a registration statement covering the shares of common stock issuable upon exercise of such warrants is not effective) or on a cashless basis, at the holder’s option, and will not be redeemable by us, in each case so long as they are still held by the initial purchasers or their affiliates. The private warrants purchased by CleanTech Investments will not be exercisable more than five years from the effective date of the registration statement, of which the Company’s prospectus forms a part, in accordance with FINRA Rule 5110(g)(8), as long as Chardan Capital Markets, LLC or any of its related persons beneficially own these private warrants.

The Company may call the outstanding warrants for redemption (excluding the private warrants but including any warrants already issued upon exercise of the unit purchase option), in whole and not in part, at a price of $0.01 per warrant:

The right to exercise will be forfeited unless the warrants are exercised prior to the date specified in the notice of redemption. On and after the redemption date, a record holder of a warrant will have no further rights except to receive the redemption price for such holder’s warrant upon surrender of such warrant.

If the Company calls the warrants for redemption as described above, the Company’s management will have the option to require all holders that wish to exercise warrants to do so on a “cashless basis.” In such event, each holder would pay the exercise price by surrendering the warrants for that number of shares of common stock equal to the quotient obtained by dividing (x) the product of the number of shares of common stock underlying the warrants, multiplied by the difference between the exercise price of the warrants and the “fair market value” by (y) the fair market value. The “fair market value” shall mean the average reported last sale price of the Company’s common stock for the 10 trading days ending on the third trading day prior to the date on which the notice of redemption is sent to the holders of warrants. Whether the Company will exercise the option to require all holders to exercise their warrants on a “cashless basis” will depend on a variety of factors including the price of the common shares at the time the warrants are called for redemption, the Company’s cash needs at such time and concerns regarding dilutive share issuances.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

The exercise price and number of shares of common stock issuable on exercise of the warrants may be adjusted in certain circumstances including in the event of a share dividend, extraordinary dividend or the Company’s recapitalization, reorganization, merger or consolidation. In addition, if the Company issues additional shares of common stock or equity-linked securities for capital raising purposes in connection with the closing of the initial Business Combination at a newly issued price of less than $9.20 per share of common stock (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 Company’s initial stockholders or their affiliates, without taking into account any founder shares or private warrants held by them, as applicable, prior to such issuance), the exercise price of the warrants will be adjusted (to the nearest cent) to be equal to 115% of the newly issued price and the $16.50 per share redemption trigger price described below under will be adjusted (to the nearest cent) to be equal to 165% of the market value (the volume weighted average trading price of the common stock during the 20 trading day period starting on the trading day prior to the consummation of an initial Business Combination).

The warrants may be exercised upon surrender of the warrant certificate on or prior to the expiration date at the offices of the warrant agent, with the exercise form on the reverse side of the warrant certificate completed and executed as indicated, accompanied by full payment of the exercise price, by certified or official bank check payable to us, for the number of warrants being exercised. The warrant holders do not have the rights or privileges of holders of shares of common stock and any voting rights until they exercise their warrants and receive shares of common stock. After the issuance of shares of common stock upon exercise of the warrants, each holder will be entitled to one vote for each share held of record on all matters to be voted on by stockholders.

Except as described above, no public warrants will be exercisable for cash, and the Company will not be obligated to issue shares of common stock unless at the time a holder seeks to exercise such warrant, a prospectus relating to the shares of common stock issuable upon exercise of the warrants is current and the shares of common stock have been registered or qualified or deemed to be exempt under the securities laws of the state of residence of the holder of the warrants. Under the terms of the warrant agreement, the Company has agreed to use best efforts to meet these conditions and to maintain a current prospectus relating to the shares of common stock issuable upon exercise of the warrants until the expiration of the warrants. However, the Company cannot assure you that it will be able to do so and, if the Company does not maintain a current prospectus relating to the shares of common stock issuable upon exercise of the warrants, holders will be unable to exercise their warrants, and the Company will not be required to settle any such warrant exercise. If the prospectus relating to the shares of common stock issuable upon the exercise of the warrants is not current or if the common stock is not qualified or exempt from qualification in the jurisdictions in which the holders of the warrants reside, the Company will not be required to net cash settle or cash settle the warrant exercise, the warrants may have no value, the market for the warrants may be limited, and the warrants may expire worthless.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

No fractional shares will be issued upon exercise of the warrants. If, upon exercise of the warrants, a holder would be entitled to receive a fractional interest in a share, the Company will, upon exercise, round down to the nearest whole number the number of shares of common stock to be issued to the warrant holder.

The Company accounts for the 14,000,000 warrants issued in connection with the Initial Public Offering in accordance with the guidance contained in ASC 815-40. Such guidance provides that because the warrants do not meet the criteria for equity treatment thereunder, each warrant must be recorded as a liability.

The accounting treatment of derivative financial instruments required that the Company record the warrants as derivative liabilities at fair value upon the closing of the Initial Public Offering. The Public Warrants were allocated a portion of the proceeds from the issuance of the Units equal to its fair value. This warrant liabilities are subject to re-measurement at each balance sheet date. With each such re-measurement, the warrant liability will be adjusted to its current fair value, with the change in fair value recognized in the Company’s statement of operations. The Company will reassess the classification at each balance sheet date. If the classification changes as a result of events during the period, the warrants will be reclassified as of the date of the event that causes the reclassification.

NOTE 9. STOCKHOLDERS’ DEFICIT

Preferred Stock — At July 19, 2021, the Company had no issued or outstanding shares of preferred stock. The Company’s Amended and Restated Certificate of Incorporation authorizes 1,000,000 shares of preferred stock with a par value of $0.0001 per share with such designations, voting and other rights and preferences as may be determined from time to time by the Company’s board of directors.

Common Stock— On July 16, 2021, the Company amended its Amended and Restated Certificate of Incorporation such that the Company is authorized to issue 200,000,000 shares of common stock with a par value of $0.0001 per share. As of July 19, 2021, there were 19,312,500 shares of common stock outstanding, of which 15,000,000 shares are subject to possible redemption. Of the 19,312,500 shares of common stock outstanding, up to 562,500 shares are subject to forfeiture to the Company by the Sponsor for no consideration to the extent that the underwriters’ over-allotment option is not exercised in full or in part, so that the initial stockholders will collectively own 20% of the Company’s issued and outstanding common stock after the initial public offering.

Holders of record of common stock are entitled to one vote for each share held on all matters to be voted on by stockholders. In connection with any vote held to approve the initial Business Combination, insiders, officers and directors, have agreed to vote their respective shares of common stock owned by them immediately prior to the initial public offering, including both the insider shares and any shares acquired in the initial public offering or following the initial public offering in the open market, in favor of the proposed Business Combination.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

Rights — Except in cases where the Company is not the surviving company in a Business Combination, each holder of a right will automatically receive one-twentieth (1/20) of a share of common stock upon consummation of the Business Combination, even if the holder of a right converted all shares held by him, her or it in connection with the Business Combination or an amendment to the Company’s Certificate of Incorporation with respect to its pre-business combination activities. In the event that the Company will not be the surviving company upon completion of the Business Combination, each holder of a right will be required to affirmatively convert his, her or its rights in order to receive the one-twentieth (1/20) of a share of common stock underlying each right upon consummation of the Business Combination. No additional consideration will be required to be paid by a holder of rights in order to receive his, her or its additional share of common stock upon consummation of the Business Combination. The shares issuable upon exchange of the rights will be freely tradable (except to the extent held by affiliates of the Company). If the Company enters into a definitive agreement for a Business Combination in which the Company will not be the surviving entity, the definitive agreement will provide for the holders of rights to receive the same per share consideration the holders of shares of common stock will receive in the transaction on an as-converted into common stock basis.

The Company will not issue fractional shares in connection with an exchange of rights. As a result, the holders of the rights must hold rights in multiples of 20 in order to receive shares for all of the holders’ rights upon closing of a Business Combination. If the Company is unable to complete an initial Business Combination within the required time period and the Company liquidates the funds held in the Trust Account, holders of rights will not receive any of such funds with respect to their rights, nor will they receive any distribution from the Company’s assets held outside of the Trust Account with respect to such rights, and the rights will expire worthless. Additionally, in no event will the Company be required to net cash settle the rights. Accordingly, the rights may expire worthless.

NOTE 10. FAIR VALUE MEASUREMENTS (As Restated, see Note 2)

The following table presents information about the Company’s financial assets and liabilities that are measured at fair value on a recurring basis as of July 19, 2021, and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine such fair value:

The Company utilizes a Monte Carlo simulation model to value the Public Warrants and a Modified Black-Scholes method to value the Private Placement Warrants and over-allotment option at each reporting period, with changes in fair value recognized in the statement of operations. The estimated fair value of the warrant liabilities are determined using Level 3 inputs. Inherent in a Black-Scholes Option Pricing Model are assumptions related to expected share-price volatility, expected life, risk-free interest rate and dividend yield. The Company estimates the volatility of its common stock based on historical volatility that matches the expected remaining life of the warrants. Significant increases (decreases) in the expected volatility in isolation would result in a significantly higher (lower) fair value measurement. 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 to remain at zero.

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

Transfers to/from Levels 1, 2, and 3 are recognized at the end of the reporting periods. There were no transfers between levels of the hierarchy for the period from June 18, 2020 (inception) through July 19, 2021.

The following table provides the significant inputs to the Monte Carlo simulation for the fair value of the Public Warrants:

The following table provides the significant inputs to the Modified Black-Scholes method for the fair value of the Private Placement Warrants:

The following table provides the significant inputs to the Modified Black-Scholes method for the fair value of the over-allotment option:

CLEANTECH ACQUISITION CORP.

NOTES TO FINANCIAL STATEMENT

The following table provides a summary of the changes in the fair value of the Company’s Level 3 financial instruments that are measured at fair value on a recurring basis:

NOTE 11. SUBSEQUENT EVENTS

The Company evaluated subsequent events and transactions that occurred after the balance sheet date up to the date that the financial statement was issued. Based upon this review, besides the items identified below, the Company did not identify any subsequent events that would have required adjustment or disclosure in the financial statement.

On July 26, 2021, the underwriters fully exercised the over-allotment option and purchased an additional 2,250,000 Units (the “Over-Allotment Units”) at $10.00 per unit, generating gross proceeds of $22,500,000 on July 28, 2021.

Simultaneously with the sale of Over-Allotment Units, the Company consummated a private sale of an additional 675,000 Private Warrants at a purchase price of $1.00 per Private Warrant, generating gross proceeds of $675,000.

F-21