Item 1.01 Entry Into A Material Definitive Agreement.

Merger Agreement

On May 6, 2021, ACON S2 Acquisition Corp., a Cayman Islands exempted company ("STWO"), entered into an Agreement and Plan of Merger (as it may be amended, supplemented or otherwise modified from time to time, the "Merger Agreement"), by and among SCharge Merger Sub, Inc., a Delaware corporation and a wholly-owned direct subsidiary of STWO ("Merger Sub"), and ESS Tech, Inc., a Delaware corporation ("ESS").

The Merger Agreement and the transactions contemplated thereby were approved by the boards of directors of each of STWO and ESS.

The Business Combination

The Merger Agreement provides for, among other things, the following transactions at the closing: (i) STWO will become a Delaware corporation (the "Domestication"), (ii) following the Domestication, Merger Sub will merge with and into ESS, with ESS as the surviving company in the merger and, after giving effect to such merger, continuing as a wholly-owned subsidiary of STWO (the "Merger") and, in connection with the Merger, (iii) STWO's name will be changed to ESS Tech, Inc. The Domestication, the Merger and the other transactions contemplated by the Merger Agreement are hereinafter referred to as the "Business Combination".

The Business Combination is expected to close in the third quarter of 2021, following the receipt of the required approval by STWO's stockholders and the fulfillment of other customary closing conditions.

Business Combination Consideration

In accordance with the terms and subject to the conditions of the Merger Agreement, each share of common stock of ESS, par value $0.0001 per share ("ESS Common Stock"), other than any Cancelled Shares (as defined in the Merger Agreement) and Dissenting Shares (as defined in the Merger Agreement) shall be converted into the right to receive a fraction of a share of duly authorized, validly issued, fully paid and nonassessable common stock, par value $0.0001 per share, of STWO ("STWO Common Stock") based on adjusted equity value of ESS as described in the Merger Agreement. Additionally, in the event that the closing sale price of STWO Common Stock exceeds certain price thresholds for sustained periods of time or there is a change of control where the per share consideration paid in the transaction exceeds certain thresholds, additional STWO Common Stock may be issued to the parties that were holders of ESS Common Stock immediately prior to the closing of the Business Combination.

Governance

STWO has agreed to take all action within its power as may be necessary or appropriate such that, effective immediately after the closing of the Business Combination, the STWO board of directors shall consist of nine directors, which shall be divided into three classes, which directors shall include seven directors designated by ESS and two directors designated by certain current shareholders of ESS. Additionally, the current ESS management team will move to STWO in their current roles and titles.

Representations and Warranties; Covenants

The Merger Agreement contains representations, warranties and covenants of each of the parties thereto that are customary for transactions of this type, including with respect to the operations of STWO and ESS and that each of the parties have undertaken to procure approval under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the "HSR Act"). In addition, STWO has agreed to adopt an equity incentive plan and employee stock purchase plan, as described in the Merger Agreement.

Conditions to Each Party's Obligations

The obligation of STWO and ESS to consummate the Business Combination is subject to certain closing conditions, including, but not limited to, (i) the expiration or termination of the applicable waiting period under the HSR Act, (ii) the approval of STWO's shareholders, (iii) the approval of ESS's shareholders and (iv) the Registration Statement (as defined below) becoming effective.

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In addition, the obligation of STWO to consummate the Business Combination is subject to the fulfillment of other closing conditions, including, but not limited to, (i) the representations and warranties of ESS being true and correct to the standards applicable to such representations and warranties and each of the covenants of ESS having been performed or complied with in all material respect and (ii) no Material Adverse Effect (as defined in the Merger Agreement) shall have occurred.

The obligation of ESS to consummate the Business Combination is also subject to the fulfillment of other closing conditions, including, but not limited to, (i) the representations and warranties of STWO and Merger Sub being true and correct to the standards applicable to such representations and warranties and each of the covenants of STWO having been performed or complied with in all material respects, (ii) the aggregate cash proceeds from STWO's trust account, together with the proceeds from the PIPE Financing (as defined below), equaling no less than $200,000,000 (after deducting any amounts paid to STWO shareholders that exercise their redemption rights in connection with the Business Combination and net of STWO's unpaid transaction expenses and liabilities), (iii) the approval by NYSE (or Nasdaq, under certain circumstances) of STWO's listing application in connection with the Business Combination, (iv) the appointment of specified individuals as the executive officers of STWO, and (v) the Domestication shall have been completed.

Termination

The Merger Agreement may be terminated under certain customary and limited circumstances prior to the closing of the Business Combination, including, but not limited to, (i) by mutual written consent of STWO and ESS, (ii) by STWO if the representations and warranties of ESS are not true and correct or if ESS fails to perform any covenant or agreement set forth in the Merger Agreement such that certain conditions to closing cannot be satisfied and the breach or breaches of such representations or warranties or the failure to perform such covenant or agreement, as applicable, are not cured or cannot be cured within certain specified time periods, (iii) termination by ESS if the representations and warranties of STWO are not true and correct or if STWO fails to perform any covenant or agreement set forth in the Merger Agreement such that certain conditions to closing cannot be satisfied and the breach or breaches of such representations or warranties or the failure to perform such covenant or agreement, as applicable, are not cured or cannot be cured within certain specified time periods, (iv) subject to certain limited exceptions, by either STWO or ESS if the Business Combination is not consummated by November 6, 2021 (subject to a one month extension in certain circumstances) and (v) by either STWO or ESS if certain required approvals are not obtained by STWO shareholders after the conclusion of a meeting of STWO's stockholders held for such purpose at which such shareholders voted on such approval.

If the Merger Agreement is validly terminated, none of the parties to the Merger Agreement will have any liability or any further obligation under the Merger . . .

Item 3.02. Unregistered Sales of Equity Securities.

The disclosure set forth above in Item 1.01 of this Current Report on Form 8-K is incorporated by reference herein. The shares of STWO Common Stock to be offered and sold in connection with the PIPE Financing have not been registered under the Securities Act in reliance upon the exemption provided in Section 4(a)(2) thereof.

Item 7.01. Regulation FD Disclosure.

On May 7, 2021, STWO and ESS issued a press release announcing their entry into the Merger Agreement. The press release is attached hereto as Exhibit 99.1 and incorporated by reference herein.

Furnished as Exhibit 99.2 hereto and incorporated into this Item 7.01 by reference is the investor presentation that STWO and ESS have prepared for use in connection with the announcement of the Business Combination.

The foregoing (including Exhibits 99.1 and 99.2) is being furnished pursuant to Item 7.01 and will not be deemed to be filed for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise be subject to the liabilities of that section, nor will it be deemed to be incorporated by reference in any filing under the Securities Act or the Exchange Act.

Additional Information

STWO intends to file with the Securities and Exchange Commission (the "SEC") a Registration Statement on Form S-4 (as amended, the "Registration Statement"), which will include a preliminary proxy statement/prospectus of STWO, in connection with the Business Combination. After the Registration Statement is declared effective, STWO will mail a definitive proxy statement/prospectus and other relevant documents to its stockholders. STWO's stockholders and other interested persons are advised to read, when available, the preliminary proxy statement/prospectus, and amendments thereto, and definitive proxy statement/prospectus in connection with STWO's solicitation of proxies for its stockholders' meeting to be held to approve the Business Combination because the proxy statement/prospectus will contain important information about STWO, ESS and the Business Combination. The definitive proxy statement/prospectus will be mailed to stockholders of STWO as of a record date to be established for voting on the Business Combination. Stockholders will also be able to obtain copies of the Registration Statement on Form S-4 and the proxy statement/prospectus, without charge, once available, at the SEC's website at www.sec.gov. In addition, the documents filed by STWO may be obtained free of charge from STWO at https://www.STWOclean.com. Alternatively, these documents, when available, can be obtained free of charge by directing a request to: STWO Clean Transition Corp., 200 Clarendon Street, 55th Floor, Boston, MA 02116.

Participants in the Solicitation

STWO, ESS and their respective directors, executive officers, other members of management and employees, under SEC rules, may be deemed to be participants in the solicitation of proxies of STWO's shareholders in connection with the Business Combination. Investors and security holders may obtain more detailed information regarding the names and interests in the Business Combination of STWO's directors and officers in STWO's filings with the SEC, including the Registration Statement to be filed with the SEC by STWO, and such information and names of ESS's directors and executive officers will also be in the Registration Statement to be filed with the SEC by STWO, which will include the proxy statement of STWO for the Business Combination.

Forward Looking Statements

Certain statements in this Current Report on Form 8-K may be considered forward-looking statements. Forward-looking statements generally relate to future events or STWO's or ESS's future financial or operating performance. For example, statements about the expected timing of the completion of the Business Combination, the benefits of the Business Combination, the competitive environment, and the expected future performance (including future revenue, pro forma enterprise value, and cash balance) and market opportunities of ESS are forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as "may", "should", "expect", "intend", "will", "estimate", "anticipate", "believe", "predict", "potential" or "continue", or the negatives of these terms or variations of them or similar terminology. Such forward-looking statements are subject to risks, uncertainties and other factors which could cause actual results to differ materially from those expressed or implied by such forward looking statements.







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These forward-looking statements are based upon estimates and assumptions that, while considered reasonable by STWO and its management, and ESS and its management, as the case may be, are inherently uncertain. Factors that may cause actual results to differ materially from current expectations include, but are not limited to: (1) the occurrence of any event, change or other circumstances that could give rise to the termination of the Merger Agreement; (2) the outcome of any legal proceedings that may be instituted against STWO, ESS, the combined company or others following the announcement of the Business Combination; (3) the inability to complete the Business Combination due to the failure to obtain approval of the shareholders of STWO or to satisfy other conditions to closing; (4) changes to the proposed structure of the Business Combination that may be required or appropriate as a result of applicable laws or regulations or as a condition to obtaining regulatory approval of the Business Combination; (5) the ability to meet stock exchange listing standards at or following the consummation of the Business Combination; (6) the risk that the Business Combination disrupts current plans and operations of ESS as a result of the announcement and consummation of the Business Combination; (7) the ability to recognize the anticipated benefits of the Business Combination, which may be affected by, among other things, competition, the ability of the combined company to grow and manage growth profitably, maintain relationships with customers and suppliers and retain its management and key employees; (8) costs related to the Business Combination; (9) changes in applicable laws or regulations; (10) the possibility that ESS or the combined company may be adversely affected by other economic, business and/or competitive factors; and (11) other risks and uncertainties set forth in the section entitled "Risk Factors" and "Cautionary Note Regarding Forward-Looking Statements" in STWO's Registration Statement on Form S-1 (File No. 333-248515), and which will be set forth in a Registration Statement to be filed by STWO with the SEC in connection with the Business Combination.

Nothing in this Current Report on Form 8-K should be regarded as a representation by any person that the forward-looking statements set forth herein will be achieved or that any of the contemplated results of such forward-looking statements will be achieved. You should not place undue reliance on forward-looking statements, which speak only as of the date they are made. Neither STWO nor ESS undertakes any duty to update these forward-looking statements.

Disclaimer

This communication is for informational purposes only and is neither an offer to purchase, nor a solicitation of an offer to sell, subscribe for or buy, any securities or the solicitation of any vote in any jurisdiction pursuant to the Business Combination or otherwise, nor shall there be any sale, issuance or transfer or securities in any jurisdiction in contravention of applicable law. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act.

Item 9.01 Financial Statements and Exhibits.




(d) Exhibits



Exhibit
Number                                   Description

 2.1†         Agreement and Plan of Merger, dated as of May 6, 2021, by and among
            ACON S2 Acquisition Corp., SCharge Merger Sub, Inc., and ESS Tech,
            Inc.

10.1          Form of Subscription Agreement  .

10.2          Transaction Support Agreement, dated as of May 6, 2021, by and among
            ACON S2 Acquisition Corp. and ESS Tech, Inc. and certain other parties
            thereto.

10.3          Sponsor Letter Agreement, dated as of May 6, 2021, by and among ACON
            S2 Sponsor, L.L.C., ACON S2 Acquisition Corp. and ESS Tech, Inc and
            certain other parties thereto.

10.4          Form of Registration Rights Agreement.

99.1          Press Release, dated March 7, 2021.

99.2          Investor Presentation, dated March 7, 2021.



† Certain of the exhibits and schedules to this exhibit have been omitted in


    accordance with Regulation S-K Item 601(b)(2). The Registrant agrees to
    furnish supplementally a copy of all omitted exhibits and schedules to the
    SEC upon its request.




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