Form of Registration Rights Agreement

Exhibit 10.4

FORM OF REGISTRATION RIGHTS AGREEMENT

This Registration Rights Agreement (this “Agreement”), dated as of [•], 2021, is made and entered into by and among ESS Tech, Inc., a Delaware corporation (the “Company”), ACON S2 Sponsor, L.L.C., a Delaware limited liability company (the “Sponsor”), and the undersigned parties listed under Holder on the signature page hereto (each such party, together with the Sponsor and any person or entity who hereafter becomes a party to this Agreement pursuant to Section 5.2 of this Agreement, a “Holder” and collectively the “Holders”).

RECITALS

WHEREAS, the Company has entered into that certain Agreement and Plan of Merger, dated as of May 6, 2021 (as it may be amended or supplemented from time to time, the “Merger Agreement”), by and among the Company, ACON S2 Acquisition Corp. and SCharge Merger Sub, Inc.;

WHEREAS, in connection with the transactions contemplated by the Merger Agreement, including a private placement of Acquiror Common Stock (as defined in the Merger Agreement) made in connection with the transactions contemplated by the Merger Agreement (the “PIPE”), the Holders will receive shares of Acquiror Common Stock (as defined in the Merger Agreement);

WHEREAS, the Company and the Holders desire to enter into this Agreement, pursuant to which the Company shall grant the Holders certain registration rights with respect to certain securities of the Company, as set forth in this Agreement.

NOW, THEREFORE, in consideration of the mutual representations, covenants and agreements contained herein, and certain other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound, hereby agree as follows:

ARTICLE I

DEFINITIONS

1.1 Definitions. The terms defined in this Article I shall, for all purposes of this Agreement, have the respective meanings set forth below:

“Additional Holder” has the meaning given in Section 5.10.

“Additional Holder Common Stock” has the meaning given in Section 5.10.

“Adverse Disclosure” means any public disclosure of material non-public information, which disclosure, in the good faith judgment of the Chief Executive Officer or the Chief Financial Officer of the Company, after consultation with counsel to the Company, (i) would be required to be made in any Registration Statement or Prospectus in order for the applicable Registration Statement or Prospectus not to contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements contained therein (in the case of any prospectus and any preliminary prospectus, in the light of the circumstances under which they were made) not misleading, (ii) would not be required to be made at such time if the Registration Statement were not being filed, declared effective or used, as the case may be, and (iii) the Company has a bona fide business purpose for not making such information public.

“Agreement” has the meaning given in the Preamble hereto.

“Block Trade” has the meaning given in Section2.4.1.

“Bylaws” means the bylaws of the Company to be in at the Effective Time.

“Closing” has the meaning given in the Merger Agreement.

“Closing Date” has the meaning given in the Merger Agreement.

“Commission” means the Securities and Exchange Commission.

“Common Stock” has the meaning given in the Recitals hereto.

“Company” has the meaning given in the Preamble hereto and includes the Company’s successors by recapitalization, merger, consolidation, spin-off, reorganization or similar transaction.

“Competing Registration Rights” has the meaning given in Section 5.7.

“Demanding Holder” has the meaning given in Section 2.1.4.

“Effective Time” has the meaning given in the Merger Agreement.

“Exchange Act” means the Securities Exchange Act of 1934, as it may be amended from time to time.

“Form S-1 Shelf” has the meaning given in Section 2.1.1.

“Form S-3 Shelf” has the meaning given in Section 2.1.1.

“Holder Information” has the meaning given in Section 4.1.2.

“Holders” has the meaning given in the Preamble hereto, for so long as such person or entity holds any Registrable Securities.

“Joinder” has the meaning given in Section 5.10.

“Lock-up Period” means, with respect to each Holder, the period of time such Holder’s Registrable Securities (excluding any Registrable Securities acquired in the PIPE) are subject to the restrictions on transfers set forth in Section 6.8 of the Bylaws.

“Maximum Number of Securities” has the meaning given in Section 2.1.5.

“Merger Agreement” has the meaning given in the Recitals hereto.

“Minimum Takedown Threshold” has the meaning given in Section 2.1.4.

“Misstatement” means an untrue statement of a material fact or an omission to state a material fact required to be stated in a Registration Statement or Prospectus or necessary to make the statements in a Registration Statement or Prospectus (in the case of a Prospectus, in the light of the circumstances under which they were made) not misleading.

“Permitted Transferees” means any person or entity to whom the Holder may transfer Registrable Securities under the terms of the Bylaws.

“Person” means an individual, a corporation, a partnership, limited liability entity, an association, a trust or any other entity or organization, including a government, a political subdivision or an agency or instrumentality thereof.

“Piggyback Registration” has the meaning given in Section 2.2.1.

“PIPE” has the meaning given in the Recitals.

“Prospectus” means the prospectus included in any Registration Statement, as supplemented by any and all prospectus supplements and as amended by any and all post-effective amendments and including all material incorporated by reference in such prospectus.

“Registrable Security” means (a) any outstanding shares of Common Stock or any other equity security (including warrants to purchase shares of Common Stock and shares of Common Stock issued or issuable upon the exercise of any other equity security) of the Company held by a Holder immediately following the Closing (including any securities distributable pursuant to the Merger Agreement), (b) any outstanding shares of Common Stock or any other equity security (including warrants to purchase shares of Common Stock and shares of Common Stock issued or issuable upon the exercise of any other equity security) of the Company acquired by a Holder following the date hereof to the extent that such securities are “restricted securities” (as defined in Rule 144) or are otherwise held by an “affiliate” (as defined in Rule 144) of the Company, (c) any Additional Holder Common Stock, and (d) any other equity security of the Company or any of its subsidiaries issued or issuable with respect to any securities referenced in clause (a), (b) or (c) above by way of a stock dividend or stock split or in connection with a recapitalization, merger, consolidation, spin-off, reorganization or similar transaction; provided, however, that, as to any particular Registrable Security, such securities shall cease to be Registrable Securities upon the earliest to occur of: (A) a Registration Statement with respect to the sale of such securities shall have become effective under the Securities Act and such securities shall have been sold, transferred, disposed of or exchanged in accordance with such Registration Statement by the applicable Holder; (B) such securities shall have ceased to be outstanding; (C) such securities may be sold without registration pursuant to Rule 144 or any successor rule promulgated under the Securities Act (but with no volume or other restrictions or limitations as to manner or timing of sale); and (D) such securities have been sold to, or through, a broker, dealer or underwriter in a public distribution or other public securities transaction.

“Registration” means a registration, including any related Shelf Takedown, effected by preparing and filing a registration statement, prospectus or similar document in compliance with the requirements of the Securities Act, and the applicable rules and regulations promulgated thereunder, and such registration statement becoming effective.

“Registration Expenses” means the expenses of a Registration, including, without limitation, the following:

(A) all registration and filing fees (including fees with respect to filings required to be made with the Financial Industry Regulatory Authority, Inc.) and any national securities exchange on which the Common Stock is then listed;

(B) fees and expenses of compliance with securities or blue sky laws (including reasonable fees and disbursements of outside counsel for the Underwriters in connection with blue sky qualifications of Registrable Securities);

(C) printing, messenger, telephone and delivery expenses;

(D) reasonable fees and disbursements of counsel for the Company;

(E) reasonable fees and disbursements of all independent registered public accountants of the Company incurred specifically in connection with such Registration (including the expenses or costs associated with any annual, quarterly or special audit required and the delivery of any opinions or comfort letters expenses of any annual audit or quarterly review);

(F) reasonable fees and expenses of one (1) legal counsel selected by the Demanding Holder in an Underwritten Offering;

(G) all expenses related to any “road show” including the reasonable out-of-pocket expenses of the selling stockholders; and

(H) the expense of any Securities Act liability insurance or similar insurance.

“Registration Statement” means any registration statement that covers Registrable Securities pursuant to the provisions of this Agreement, including the Prospectus included in such registration statement, amendments (including post-effective amendments) and supplements to such registration statement, and all exhibits to and all material incorporated by reference in such registration statement.

“Requesting Holders” has the meaning given in Section 2.1.5.

“Securities Act” means the Securities Act of 1933, as amended from time to time.

“Shelf” means the Form S-1 Shelf, the Form S-3 Shelf or any Subsequent Shelf Registration, as the case may be.

“Shelf Registration” means a registration of securities pursuant to a registration statement filed with the Commission in accordance with and pursuant to Rule 415 promulgated under the Securities Act (or any successor rule then in effect).

“Shelf Takedown” shall mean an Underwritten Shelf Takedown or any proposed transfer or sale using a Registration Statement, including a Piggyback Registration.

“Shelf Takedown Request” has the meaning given in Section 2.1.4.

“Sponsor” has the meaning given in the Preamble hereto.

“Subsequent Shelf Registration” has the meaning given in Section 2.1.2.

“Transfer” means the (a) sale of, offer to sell, contract or agreement to sell, hypothecate, pledge, grant of any option to purchase or otherwise dispose of or agreement to dispose of, directly or indirectly, or establishment or increase of a put equivalent position or liquidation with respect to or decrease of a call equivalent position within the meaning of Section 16 of the Exchange Act with respect to, any security, (b) entry into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any security, whether any such transaction is to be settled by delivery of such securities, in cash or otherwise, or (c) public announcement of any intention to effect any transaction specified in clause (a) or (b).

“Underwriter” means a securities dealer who purchases any Registrable Securities as principal in an Underwritten Offering and not as part of such dealer’s market-making activities.

“Underwritten Offering” means a Registration in which securities of the Company are sold to an Underwriter in a firm commitment underwriting for distribution to the public including, including by way of a Block Trade.

“Underwritten Shelf Takedown” shall have the meaning given in Section 2.1.4.

“Well-Known Seasoned Issuer” has the meaning set forth in Rule 405 promulgated by the SEC pursuant to the Securities Act.

“Withdrawal Notice” has the meaning given in Section 2.1.6.

ARTICLE II

REGISTRATIONS AND OFFERINGS

2.1 Shelf Registration.

2.1.1 Filing. The Company shall, as promptly as reasonably practicable, but in no event later than 30 days of the Closing Date, use its commercially reasonable best efforts to file a Registration Statement for a Shelf Registration on Form S-3 (the “Form S-3 Shelf”) or, if the Company is ineligible to use a Form S-3 Shelf, a Registration Statement for a Shelf Registration on Form S-1 (the “Form S-1 Shelf”), in each case, covering the resale of all the Registrable Securities (determined as of two business days prior to such filing) on a delayed or continuous basis, and shall use its commercially reasonable best efforts to cause such Registration Statement to become effective under the Securities Act as soon as practicable after the initial filing thereof. Such Shelf Registration shall provide for the resale of the Registrable Securities included therein pursuant to any method or combination of methods legally available to, and requested by, any Holder named therein. The Company shall maintain a Shelf in accordance with the terms hereof, and shall prepare and file with the SEC such amendments, including post-effective amendments, and supplements as may be necessary to keep a Shelf continuously effective, available for use and in compliance with the provisions of the Securities Act until such time as there are no longer any Registrable Securities. In the event the Company files a Form S-1 Shelf, the Company shall use its commercially reasonable efforts to convert the Form S-1 Shelf (and any Subsequent Shelf Registration) to a Form S-3 Shelf as soon as practicable after the Company is eligible to use Form S-3.

2.1.2 Subsequent Shelf Registration. If any Shelf ceases to be effective under the Securities Act for any reason at any time while Registrable Securities are still outstanding, the Company shall, subject to Section 3.4, use its commercially reasonable efforts to as promptly as is reasonably practicable cause such Shelf to again become effective under the Securities Act (including obtaining the prompt withdrawal of any order suspending the effectiveness of such Shelf), and shall use its commercially reasonable efforts to as promptly as is reasonably practicable amend such Shelf in a manner reasonably expected to result in the withdrawal of any order suspending the effectiveness of such Shelf or file an additional registration statement as a Shelf Registration (a “Subsequent Shelf Registration”) registering the resale of all Registrable Securities (determined as of two business days prior to such filing), and pursuant to any method or combination of methods legally available to, and requested by, any Holder named therein. If a Subsequent Shelf Registration is filed, the Company shall use its commercially reasonable efforts to (i) cause such Subsequent Shelf Registration to become effective under the Securities Act as promptly as is reasonably practicable after the filing thereof (it being agreed that the Subsequent Shelf Registration shall be an automatic shelf registration statement (as defined in Rule 405 promulgated under the Securities Act) if the Company is a Well-Known Seasoned Issuer at the most recent applicable eligibility determination date) and (ii) keep such Subsequent Shelf Registration continuously effective, available for use and in compliance with the provisions of the Securities Act until such time as there are no longer any Registrable Securities. Any such Subsequent Shelf Registration shall be on Form S-3 to the extent that the Company is eligible to use such form. Otherwise, such Subsequent Shelf Registration shall be on another appropriate form.

2.1.3 Additional Registrable Securities. In the event that any Person holds Registrable Securities that are not registered for resale on a delayed or continuous basis, the Company, upon request by such Person, shall use its commercially reasonable efforts to promptly cause the resale of such Registrable Securities to be covered by the Shelf Registration by a prospectus supplement or post-effective amendment to such Shelf Registration to add such Person as a selling stockholder in such Shelf Registration to the extent permitted under the rules and regulations promulgated by the SEC.

2.1.4 Requests for Underwritten Shelf Takedowns. At any time and from time to time when an effective Shelf is on file with the Commission, a Holder (such Holder being in such case, a “Demanding Holder”) may request (a “Shelf Takedown Request”) to sell all or any portion of its Registrable Securities in an Underwritten Offering that is registered pursuant to the Shelf (each, an “Underwritten Shelf Takedown”); provided that the Company shall only be obligated to effect an Underwritten Shelf Takedown if such offering shall include (a) Registrable Securities proposed to be sold by the Demanding Holder with a total offering price reasonably expected to exceed, in the aggregate (and taking into account all Registrable Securities of other Persons that will be included in such Underwritten Shelf Takedown), $30 million (the “Minimum Takedown Threshold”) or (b) the Registrable Securities to be offered constitute all the Registrable Securities held by such Demanding Holder. All requests for Underwritten Shelf Takedowns shall be made by giving written notice to the Company at least five (5) business days prior to the public announcement of such Underwritten Shelf Takedown, which shall specify the approximate number of Registrable Securities proposed to be sold in the Underwritten Shelf Takedown. The Company shall, within two (2) business days of receiving a Shelf Takedown Request, notify, in writing, all other Holders of such Shelf Takedown Request, and each Holder who thereafter wishes to include all or a portion of such Holder’s Registrable Securities in such Underwritten Shelf Takedown shall so notify the Company, in writing, within two (2) business days of receiving such notice. The Demanding Holder or participating Holder with the greatest number Registrable Securities in an Underwritten Shelf Takedown shall have the right to select any managing underwriter(s) (which shall consist of one or more reputable nationally recognized investment banks) in connection with such Underwritten Shelf Takedown, provided that such selection shall be subject to the consent of the Company, which consent shall not be unreasonably withheld, conditioned or delayed. Notwithstanding anything to the contrary herein, in no event shall the Holder request an Underwritten Shelf Takedown during their respective Lock-Up Period. No more than four (4) Shelf Takedown Requests may be made by any Demanding Holder within any twelve (12) month period. For the avoidance of doubt, the notice periods set forth in this Section 2.1.4 shall not apply to a Piggyback Registration conducted in accordance with Section 2.2.1 or Block Trades conducted in accordance with Section 2.4.

2.1.5 Reduction of Underwritten Offering. If the managing Underwriter or Underwriters in an Underwritten Shelf Takedown, in good faith, advises the Company, the Demanding Holder and the Holders requesting piggy back rights pursuant to this Agreement with respect to such Underwritten Shelf Takedown (the “Requesting Holders”) (if any) in writing that the dollar amount or number of Registrable Securities that the Demanding Holder and the Requesting Holders (if any) desire to sell, taken together with all other shares of Common Stock or other equity securities that the Company desires to sell and all other shares of Common Stock or other equity securities, if any, which have been requested to be sold in such Underwritten Offering pursuant to separate written contractual piggy-back registration rights held by any other stockholders, exceeds the maximum dollar amount or maximum number of equity securities that can be sold in the Underwritten Offering without adversely affecting the proposed offering price, the timing, the distribution method, or the probability of success of such offering (such maximum dollar amount or maximum number of such securities, as applicable, the “Maximum Number of Securities”), then the Company shall (i) first, include in such Underwritten Offering, before including any shares of Common Stock or other equity securities proposed to be sold by Company or by other holders of Common Stock or other equity securities of the Company that the Company is obligated to register pursuant to separate written contractual arrangements with such persons or entities, the Registrable Securities of the Demanding Holder and the Requesting Holders (if any) (pro rata based on the respective number of Registrable Securities that each Demanding Holder and Requesting Holder (if any) has requested be included in such Underwritten Shelf Takedown and the aggregate number of Registrable Securities that the Demanding Holder and Requesting Holders have requested be included in such Underwritten Shelf Takedown) that can be sold without exceeding the Maximum Number of Securities, (ii) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (i), the number of Common Stock or other equity securities that the Company desires to sell, which can be sold without exceeding the Maximum Number of Securities, and (iii) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (i) and (ii), the shares of Common Stock or other equity securities of other persons or entities that the Company is obligated to register in a Registration pursuant to separate written contractual arrangements with such persons and that can be sold without exceeding the Maximum Number of Securities. 2.1.6 Underwritten Offering Withdrawal. Prior to the effectiveness of the Registration Statement filed with the Commission with respect to such Underwritten Offering or, in the case of an Underwritten Offering pursuant to a Shelf Registration, or the filing of the applicable “red herring” prospectus or prospectus supplement used for marketing such Underwritten Shelf Takedown, the Demanding Holder that initiated such Underwritten Shelf Takedown shall have the right to withdraw from such Underwritten Shelf Takedown for any or no reason whatsoever upon written notification (a “Withdrawal Notice”) to the Company and the Underwriter or Underwriters (if any) of their intention to withdraw from such Shelf Takedown; provided that the other Holders may elect to have the Company continue an Underwritten Shelf Takedown if the Minimum Takedown Threshold would still be satisfied by the Registrable Securities proposed to be sold in the Underwritten Shelf Takedown by such Holders. Following the receipt of any Withdrawal Notice, the Company shall promptly forward such Withdrawal Notice to any other Holders that had elected to participate in such Shelf Takedown. Notwithstanding anything to the contrary in this Agreement, the Company shall be responsible for the Registration Expenses incurred in connection with a Shelf Takedown prior to its withdrawal under this Section 2.1.6.

2.2 Piggyback Registration.

2.2.1 Piggyback Rights. Subject to Section 2.4.3, if the Company or any Holder proposes to conduct a registered offering of, or if the Company proposes to file a Registration Statement under the Securities Act with respect to the Registration of, equity securities, or securities or other obligations exercisable or exchangeable for, or convertible into equity securities, for its own account or for the account of stockholders of the Company (or by the Company and by the stockholders of the Company including, without limitation, an Underwritten Shelf Takedown pursuant to Section 2.1 hereof), other than a Registration Statement (or any registered offering with respect thereto) (i) filed in connection with any employee stock option or other benefit plan, (ii) pursuant to a Registration Statement on Form S-4 (or similar form that relates to a transaction subject to Rule 145 under the Securities Act or any successor rule thereto), (iii) for an offering of debt that is convertible into equity securities of the Company or (iv) for a dividend reinvestment plan, then the Company shall give written notice of such proposed offering to all of the Holders of Registrable Securities as soon as practicable but not less than ten (10) business days before the anticipated filing date of such Registration Statement or, in the case of an Underwritten Offering pursuant to a Shelf Registration, the applicable “red herring” prospectus or prospectus supplement used for marketing such offering, which notice shall (A) describe the amount and type of securities to be included in such offering, the intended method(s) of distribution, and the name of the proposed managing Underwriter or Underwriters, if any, in such offering, and (B) offer to all of the Holders of Registrable Securities the opportunity to include in such registered offering such

number of Registrable Securities as such Holders may request in writing within five (5) business days after receipt of such written notice (such registered offering, a “Piggyback Registration”). Subject to Section 2.2.2, the Company shall cause such Registrable Securities to be included in such Piggyback Registration and, if applicable, shall use its commercially reasonable efforts to cause the managing Underwriter or Underwriters of such Piggyback Registration to permit the Registrable Securities requested by the Holders pursuant to this Section 2.2.1 to be included therein on the same terms and conditions as any similar securities of the Company included in such registered offering and to permit the sale or other disposition of such Registrable Securities in accordance with the intended method(s) of distribution thereof. The inclusion of any Holder’s Registrable Securities in a Piggyback Registration shall be subject to such Holder agreement to enter into an underwriting agreement in customary form with the Underwriter(s) selected for such Underwritten Offering. For the avoidance of doubt, the notice periods set forth in this Section 2.2.1 shall not apply to an Underwritten Shelf Takedown conducted in accordance with Section 2.1.4 or Block Trades conducted in accordance with Section 2.4. Holders may deliver written notice (an “Opt-Out Notice”) to the Company requesting that such Holder not receive notice from the Company of any proposed Underwritten Offering; provided, however, that such Holder may later revoke any such Opt-Out Notice in writing prior to five business days before the time of pricing of such underwritten offering. Following receipt of an Opt-Out Notice from a Holder (unless subsequently revoked), the Company shall not be required to deliver any notice to such Holder pursuant to this Section 2.2.1 and such Holder (unless such Holder’s Opt-Out Notice is subsequently revoked) shall no longer be entitled to participate in Underwritten Offerings by the Company pursuant to this Section 2.2.1.

2.2.2 Reduction of Piggyback Registration. If the managing Underwriter or Underwriters in an Underwritten Offering that is to be a Piggyback Registration in good faith advises the Company and the Holders of Registrable Securities participating in the Piggyback Registration in writing that the dollar amount or number of shares of Common Stock or other equity securities that the Company desires to sell, taken together with (i) the shares of Common Stock or other equity securities, if any, as to which Registration or a registered offering has been demanded pursuant to separate written contractual arrangements with Persons other than the Holders of Registrable Securities hereunder, (ii) the Registrable Securities as to which registration has been requested pursuant to Section 2.2 hereof, and (iii) the shares of Common Stock or other equity securities, if any, as to which Registration or a registered offering has been requested pursuant to separate written contractual piggy-back registration rights of other stockholders of the Company, exceeds the Maximum Number of Securities, then:

(a) If the Registration or registered offering is undertaken for the Company’s account, the Company shall include in any such Registration or registered offering (A) first, the shares of Common Stock or other equity securities that the Company desires to sell, which can be sold without exceeding the Maximum Number of Securities; (B) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (A), the Registrable Securities of Holders exercising their rights to register their Registrable Securities pursuant to Section 2.2.1, pro rata, based on the respective number of Registrable Securities that each Holder has requested be included in such Underwritten Offering and the aggregate number of Registrable Securities that the Holders have requested to be included in such Underwritten Offering, which can be sold without exceeding the Maximum Number of Securities; and (C) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A) and (B), the shares of Common Stock or other equity securities, if any, as to which Registration or a registered offering has been requested pursuant to written contractual piggy-back registration rights of other stockholders of the Company, which can be sold without exceeding the Maximum Number of Securities;

(b) If the Registration or registered offering is pursuant to a request by Persons other than the Holders of Registrable Securities, then the Company shall include in any such Registration or registered offering (A) first, the shares of Common Stock or other equity securities, if any, of such requesting Persons, other than the Holders of Registrable Securities, which can be sold without exceeding the Maximum Number of Securities; (B) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (A), the Registrable Securities of Holders exercising their rights to register their Registrable Securities pursuant to Section 2.2.1, pro rata, based on the respective number of Registrable Securities that each Holder has requested be included in such Underwritten Offering and the aggregate number of Registrable Securities that the Holders have requested to be included in such Underwritten Offering, which can be sold without exceeding the Maximum Number of Securities; (C) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A) and (B), the shares of Common Stock or other equity securities that the Company desires to sell, which can be sold without exceeding the Maximum Number of Securities; and (D) fourth, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (A), (B) and (C), the shares of Common Stock or other equity securities for the account of other Persons that the Company is obligated to register pursuant to separate written contractual arrangements with such Persons, which can be sold without exceeding the Maximum Number of Securities; and

(c) If the Registration or registered offering is pursuant to a request by Holder(s) of Registrable Securities pursuant to Section 2.1 hereof, then the Company shall include in any such Registration or registered offering securities pursuant to Section 2.1.5.

2.2.3 Piggyback Registration Withdrawal. Any Holder of Registrable Securities (other than a Demanding Holder, whose right to withdrawal from an Underwritten Shelf Takedown, and related obligations, shall be governed by Section 2.1.6) shall have the right to withdraw from a Piggyback Registration for any or no reason whatsoever upon written notification to the Company and the Underwriter or Underwriters (if any) of his, her or its intention to withdraw from such Piggyback Registration prior to the effectiveness of the Registration Statement filed with the Commission with respect to such Piggyback Registration or, in the case of a Piggyback Registration pursuant to a Shelf Registration, the filing of the applicable “red herring” prospectus or prospectus supplement with respect to such Piggyback Registration used for marketing such transaction. The Company (whether on its own good faith determination or as the result of a request for withdrawal by Persons pursuant to separate written contractual obligations) may withdraw a Registration Statement filed with the Commission in connection with a Piggyback Registration (which, in no circumstance, shall include the Shelf) at any time prior to the effectiveness of such Registration Statement. Notwithstanding anything to the contrary in this Agreement (other than Section 2.1.6), the Company shall be responsible for the Registration Expenses incurred in connection with the Piggyback Registration prior to its withdrawal under this Section 2.2.3.

2.2.4 Unlimited Piggyback Registration Rights. For purposes of clarity, any Piggyback Registration effected pursuant to Section 2.2 hereof shall not be counted as a demand for an Underwritten Shelf Takedown under Section 2.1.4 hereof.

2.3 Market Stand-off. In connection with any Underwritten Offering of equity securities of the Company (other than a Block Trade), each Holder participating in such Underwritten Offering agrees that it shall not Transfer any shares of Common Stock or other equity securities of the Company (other than those included in such offering pursuant to this Agreement), without the prior written consent of the Company, during the 90-day period beginning on the date of pricing of such offering, except in the event the Underwriters managing the offering otherwise agree by written consent; provided that such each Holder shall only be subject to the restriction set forth in this Section 2.3 if the directors and officers of the Company are subject to a lock-up obligation to the Underwriters managing the offering and the length of such lock-up for such Holder shall be no longer than the shortest lock-up of any such directors and officers; provided, further, that if the Company or the underwriters of such Underwritten Offering waive or shorten the lock-up period for any of the Company’s officers, directors or stockholders, then (i) all Holders subject to such lock-up shall receive notice of such waiver or modification no later than two (2) business days following such waiver or modification, and (ii) such lock-up will be similarly waived or shortened for each such Holder. Each Holder agrees to execute a customary lock-up agreement in favor of the Underwriters to such effect (in each case on substantially the same terms and conditions as all such Holders).

2.4 Block Trades.

2.4.1 Notwithstanding the foregoing, at any time and from time to time when an effective Shelf is on file with the Commission, if a Holder wishes to engage in an Underwritten Offering not involving a “road show,” an offer commonly known as a “block trade” (a “Block Trade”), with a total offering price reasonably expected to exceed, in the aggregate, either (x) $5 million or (y) all remaining Registrable Securities held by such Holder, then notwithstanding the time periods provided for in Section 2.2.1, such Holder only needs to notify the Company of the Block Trade at least three (3) business days prior to the day such offering is to commence and the Company shall as promptly as is reasonably practicable, use its commercially reasonable efforts to facilitate such Block Trade; provided that the Holder wishing to engage in the Block Trade shall use its commercially reasonable efforts to work with the Company and any Underwriters prior to making such request in order to facilitate preparation of the registration statement, prospectus and other offering documentation related to such Block Trade.

2.4.2 Prior to the filing of the applicable “red herring” prospectus or prospectus supplement used in connection with a Block Trade, the Demanding Holder that initiated such Block Trade shall have the right to submit a Withdrawal Notice to the Company and the Underwriter or Underwriters (if any) of their intention to withdraw from such Block Trade. Notwithstanding anything to the contrary in this Agreement, the Company shall be responsible for the Registration Expenses incurred in connection with a block trade prior to its withdrawal under this Section 2.4.2.

2.4.3 Notwithstanding anything to the contrary in this Agreement, Section 2.2 hereof shall not apply to a Block Trade initiated by a Demanding Holder pursuant to this Agreement.

2.4.4 The Holder wishing to engage in a Block Trade shall have the right to select the Underwriters (which shall consist of one or more reputable nationally recognized investment banks) in connection with such Block Trade, provided that such selection shall be subject to the consent of the Company, which consent shall not be unreasonably withheld, conditioned or delayed.

ARTICLE III

COMPANY PROCEDURES

3.1 General Procedures. In connection with any Shelf and/or Shelf Takedown, the Company shall use its commercially reasonable efforts to effect such Registration to permit the sale of such Registrable Securities in accordance with the intended plan of distribution thereof, and pursuant thereto the Company shall:

3.1.1 prepare and file with the Commission as soon as is reasonably practicable a Registration Statement with respect to such Registrable Securities and use its commercially reasonable efforts to cause such Registration Statement to become effective and remain effective until all Registrable Securities have ceased to be Registrable Securities;

3.1.2 prepare and file with the Commission such amendments and post-effective amendments to the Registration Statement, and such supplements to the Prospectus, as may be reasonably requested by any Holder that holds at least five percent (5%) of the Registrable Securities registered on such Registration Statement or any Underwriter of Registrable Securities or as may be required by the rules, regulations or instructions applicable to the registration form used by the Company or by the Securities Act or rules and regulations thereunder to keep the Registration Statement effective until all Registrable Securities covered by such Registration Statement are sold in accordance with the intended plan of distribution set forth in such Registration Statement or supplement to the Prospectus;

3.1.3 prior to filing a Registration Statement or Prospectus, or any amendment or supplement thereto, furnish without charge to the Underwriters, if any, and the Holders of Registrable Securities included in such Registration, and such Holders’ legal counsel, copies of such Registration Statement as proposed to be filed, each amendment and supplement to such Registration Statement (in each case including all exhibits thereto and documents incorporated by reference therein), the Prospectus included in such Registration Statement (including each preliminary Prospectus), and such other documents as the Underwriters and the Holders of Registrable Securities included in such Registration or the legal counsel for any such Holders may request in order to facilitate the disposition of the Registrable Securities owned by such Holders;

3.1.4 prior to any public offering of Registrable Securities (i) register or qualify the Registrable Securities covered by the Registration Statement under such securities or “blue sky” laws of such jurisdictions in the United States as the Holders of Registrable Securities included in such Registration Statement (in light of their intended plan of distribution) may request (or provide evidence satisfactory to such Holders that the Registrable Securities are exempt from such registration or qualification) and (ii) take such action necessary to cause such Registrable Securities covered by the Registration Statement to be registered with or approved by such other governmental authorities as may be necessary by virtue of the business and operations of the Company and do any and all other acts and things that may be necessary or advisable to enable the Holders of Registrable Securities included in such Registration Statement to consummate the disposition of such Registrable Securities in such jurisdictions; provided, however, that the Company shall not be required to qualify generally to do business in any jurisdiction where it would not otherwise be required to qualify or take any action to which it would be subject to general service of process or taxation in any such jurisdiction where it is not then otherwise so subject;

3.1.5 cause all such Registrable Securities to be listed on each national securities exchange on which similar securities issued by the Company are then listed;

3.1.6 provide a transfer agent or warrant agent, as applicable, and registrar for all such Registrable Securities no later than the effective date of such Registration Statement;

3.1.7 advise each seller of such Registrable Securities, promptly after it shall receive notice or obtain knowledge thereof, of the issuance of any stop order by the Commission suspending the effectiveness of such Registration Statement or the initiation or threatening of any proceeding for such purpose and promptly use its commercially reasonable efforts to prevent the issuance of any stop order or to obtain its withdrawal if such stop order should be issued;

3.1.8 prior to the filing of any Registration Statement or Prospectus or any amendment or supplement to such Registration Statement or Prospectus (or such shorter period of time as may be necessary in order to comply with the Securities Act, the Exchange Act, and the rules and regulations promulgated under the Securities Act or Exchange Act, as applicable), furnish a copy thereof to each seller of such Registrable Securities or its counsel (excluding any exhibits thereto and any filing made under the Exchange Act that is to be incorporated by reference therein);

3.1.9 notify the Holders at any time when a Prospectus relating to such Registration Statement is required to be delivered under the Securities Act, of the happening of any event as a result of which the Prospectus included in such Registration Statement, as then in effect, includes a Misstatement, and then to correct such Misstatement as set forth in Section 3.4 hereof;

3.1.10 permit a representative of the Holders, the Underwriters, if any, and any attorney or accountant retained by such Holders or Underwriter to participate, at each such person’s own expense, in the preparation of the Registration Statement, and cause the Company’s officers, directors and employees to supply all information reasonably requested by any such representative, Underwriter, attorney or accountant in connection with the Registration; provided, however, that such representatives or Underwriters agree to confidentiality arrangements reasonably satisfactory to the Company, prior to the release or disclosure of any such information;

3.1.11 obtain a “cold comfort” letter from the Company’s independent registered public accountants in the event of an Underwritten Offering, in customary form and covering such matters of the type customarily covered by “cold comfort” letters as the managing Underwriter may reasonably request, and reasonably satisfactory to a majority-in-interest of the participating Holders;

3.1.12 in connection with an Underwritten Offering, on the date the Registrable Securities are delivered for sale pursuant to such Registration, obtain an opinion, dated such date, of counsel representing the Company for the purposes of such Registration, addressed to the Holders, the placement agent or sales agent, if any, and the Underwriters, if any, covering such legal matters with respect to the Registration in respect of which such opinion is being given as the Holders, placement agent, sales agent, or Underwriter may reasonably request and as are customarily included in such opinions and negative assurance letters, and reasonably satisfactory to a majority-in-interest of the participating Holders;

3.1.13 in the event of any Underwritten Offering, enter into and perform its obligations under an underwriting agreement, in usual and customary form, with the managing Underwriter of such offering;

3.1.14 make available to its security holders, as soon as is reasonably practicable, an earning statement covering the period of at least twelve (12) months beginning with the first day of the Company’s first full calendar quarter after the effective date of the Registration Statement which satisfies the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder (or any successor rule then in effect);

3.1.15 with respect to an Underwritten Offering pursuant to Section 2.1.4 involving gross proceeds in excess of the Minimum Takedown Threshold, use its commercially reasonable efforts to make available senior executives of the Company to participate in customary “road show” presentations that may be reasonably requested by the Underwriter in such Underwritten Offering;

3.1.16 enter into customary agreements (including, applicable, an underwriting agreement or other sales or distribution agreement in customary form) and take such other actions as are reasonably required in order to expedite or facilitate the disposition of the Registrable Securities, and the representations, warranties and covenants of the Company in any such agreement which are made to or for the benefit of any Underwriters or other placement agent or sales agent, to the extent applicable, shall also be made to and for the benefit of the Holders of Registrable Securities included in such registration statement;

3.1.17 the principal executive officer, principal financial officer and principal accounting officer of the Company and all other officers and members of the management of the Company shall cooperate fully in the offering of Registrable Securities hereunder, which cooperation shall include, without limitation, the preparation of the Registration Statement with respect to such offering and all other offering materials and related documents, and participation in meetings with Underwriters, attorneys, accountants and potential investors; and

3.1.18 otherwise, in good faith, cooperate reasonably with, and take such customary actions as may reasonably be requested by the Holders, in connection with such Registration.

Notwithstanding the foregoing, the Company shall not be required to provide any documents or information to an Underwriter if such Underwriter has not then been named with respect to the applicable Underwritten Offering.

3.2 Registration Expenses. The Registration Expenses of all Registrations shall be borne by the Company. It is acknowledged by the Holders that the Holders shall bear all incremental selling expenses relating to the sale of Registrable Securities, such as Underwriters’ commissions and discounts, brokerage fees, Underwriter marketing costs and, other than as set forth in the definition of “Registration Expenses”, all reasonable fees and expenses of any legal counsel representing the Holders, in each case pro rata based on the number of Registrable Securities that such Holders have sold in such Registration.

3.3 Requirements for Participation in Registration Statement Underwritten Offerings. Notwithstanding anything in this Agreement to the contrary, if any Holder does not provide the Company with its requested Holder Information within two (2) days prior to filing the filing of the applicable “red herring” prospectus or prospectus supplement, the Company may exclude such Holder’s Registrable Securities from the applicable Registration Statement or Prospectus if the Company determines, based on the advice of counsel, that such information is necessary to effect the registration and such Holder continues thereafter to withhold such information. No person may participate in any Underwritten Offering for equity securities of the Company pursuant to a Registration initiated by the Company hereunder unless such person (i) agrees to sell such person’s securities on the basis provided in any underwriting arrangements approved by the Company and (ii) completes and executes all customary questionnaires, powers of attorney, indemnities, lock-up agreements, underwriting agreements and other customary documents as may be reasonably required under the terms of such underwriting arrangements. The exclusion of a Holder’s Registrable Securities as a result of this Section 3.3 shall not affect the registration of the other Registrable Securities to be included in such Registration.

3.4 Suspension of Sales; Adverse Disclosure; Restrictions on Registration Rights.

3.4.1 Upon receipt of written notice from the Company that a Registration Statement or Prospectus contains a Misstatement, each of the Holders shall forthwith discontinue disposition of Registrable Securities until it has received copies of a supplemented or amended Prospectus correcting the Misstatement (it being understood that the Company hereby covenants to prepare and file such supplement or amendment as soon as practicable after the time of such notice), or until it is advised in writing by the Company that the use of the Prospectus may be resumed.

3.4.2 Subject to Section 3.4.4, if the filing, initial effectiveness or continued use of a Registration Statement in respect of any Registration at any time would (a) require the Company to make an Adverse Disclosure, (b) require the inclusion in such Registration Statement of financial statements that are unavailable to the Company for reasons beyond the Company’s control, or (c) in the good faith judgment of the majority of the Board such Registration, be seriously detrimental to the Company and the majority of the Board concludes as a result that it is essential to defer such filing, initial effectiveness or continued use at such time, the Company may, upon giving prompt written notice of such action to the Holders, delay the filing or initial effectiveness of, or suspend use of, such Registration Statement for the shortest period of time determined in good faith by the Company to be necessary for such purpose. In the event the Company exercises its rights under this Section 3.4.2, the Holders agree to suspend, immediately upon their receipt of the notice referred to above, their use of the Prospectus relating to any Registration in connection with any sale or offer to sell Registrable Securities.

3.4.3 Subject to Section 3.4.4, (a) during the period starting with the date sixty (60) days prior to the Company’s good faith estimate of the date of the filing of, and ending on a date one hundred and twenty (120) days after the effective date of, a Company-initiated Registration and provided that the Company continues to actively employ, in good faith, all reasonable efforts to maintain the effectiveness of the applicable Registration Statement, or (b) if, pursuant to Section 2.1.4, Holders have requested an Underwritten Shelf Takedown and the Company and Holders are unable to obtain the commitment of underwriters to firmly underwrite such offering, the Company may, upon giving prompt written notice of such action to the Holders, delay any other registered offering pursuant to Section 2.1.4 or 2.4.

3.4.4 The right to delay or suspend any filing, initial effectiveness or continued use of a Registration Statement pursuant to Section 3.4.2 or a registered offering pursuant to Section 3.4.3 shall be exercised by the Company, in the aggregate, not more than three (3) times in any twelve-month period, and any such delay or suspension shall last for no more than sixty (60) days.

3.4.5. The Company shall not hereafter enter into any agreement with respect to its securities which is inconsistent with or violates the rights granted to the Holders of Registrable Securities in this Agreement and in the event of any conflict between any such agreement or agreements and this Agreement, the terms of this Agreement shall prevail.

3.5 Reporting Obligations. As long as any Holder shall own Registrable Securities, the Company, at all times while it shall be a reporting company under the Exchange Act, covenants to file timely (or obtain extensions in respect thereof and file within the applicable grace period) all reports required to be filed by the Company after the date hereof pursuant to Sections 13(a) or 15(d) of the Exchange Act and to promptly furnish the Holders with true and complete copies of all such filings; provided that any documents publicly filed or furnished with the Commission pursuant to the Electronic Data Gathering, Analysis and Retrieval System shall be deemed to have been furnished or delivered to the Holders pursuant to this Section 3.5. The Company further covenants that it shall take such further action as any Holder may reasonably request, all to the extent required from time to time to enable such Holder to sell shares of Common Stock held by such Holder without registration under the Securities Act within the limitation of the exemptions provided by Rule 144 promulgated under the Securities Act (or any successor rule then in effect), including making available at all times information necessary to enable such Holder to comply with Rule 144. Upon the request of any Holder, the Company shall deliver to such Holder a written certification of a duly authorized officer as to whether it has complied with such requirements.

ARTICLE IV

INDEMNIFICATION AND CONTRIBUTION

4.1 Indemnification.

4.1.1 The Company agrees to indemnify, to the extent permitted by law, each Holder of Registrable Securities, its officers, directors and agents and each person who controls such Holder (within the meaning of the Securities Act) against all losses, claims, damages, liabilities and out-of-pocket expenses (including reasonable outside attorneys’ fees) resulting from any untrue or alleged untrue statement of material fact contained in any Registration Statement, Prospectus or preliminary Prospectus or any amendment thereof or supplement thereto or any omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, except insofar as the same are caused by or contained in any information or affidavit so furnished in writing to the Company by such Holder expressly for use therein. The Company shall indemnify the Underwriters, their officers and directors and each person who controls such Underwriters (within the meaning of the Securities Act) to the same extent as provided in the foregoing with respect to the indemnification of the Holder.

4.1.2 In connection with any Registration Statement in which a Holder of Registrable Securities is participating, such Holder shall furnish to the Company in writing such information with respect to such Holder as the Company reasonably requests for use in connection with any such Registration Statement or Prospectus covering Registrable Securities of such Holder (the “Holder Information”) and, to the extent permitted by law, shall indemnify the Company, its directors, officers and agents and each person who controls the Company (within the meaning of the Securities Act) against all losses, claims, damages, liabilities and expenses (including reasonable outside attorneys’ fees) resulting from any untrue or alleged untrue statement of a material fact contained in any Registration Statement, Prospectus or preliminary Prospectus or any amendment thereof or supplement thereto or any omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, but only to the extent that such untrue statement or omission is contained in any information so furnished in writing by such Holder expressly for use therein; provided, however, that the obligation to indemnify shall be several, not joint and several, among such Holders of Registrable Securities, and the liability of each such Holder of Registrable Securities shall be in proportion to and limited to the net proceeds received by such Holder from the sale of Registrable Securities pursuant to such Registration Statement. The Company and the Holders hereby acknowledge and agree that, unless otherwise expressly agreed to in writing by such Holder, the only information furnished or to be furnished to the Company for use in any Registration Statement or Prospectus relating to the Registrable Securities

or in any amendment, supplement or preliminary materials associated therewith are statements specifically relating to (a) transactions or the relationship between such Holder and its affiliates, on the one hand, and the Company, on the other hand, (b) the beneficial ownership of Registrable Securities by such Holder and its affiliates, (c) the name and address of such Holder and (d) any additional information about such Holder or the plan of distribution (other than for an underwritten offering) required by law or regulation to be disclosed in any such document. The Holders of Registrable Securities shall indemnify the Underwriters, their officers, directors and each person who controls such Underwriters (within the meaning of the Securities Act) to the same extent as provided in the foregoing with respect to indemnification of the Company.

4.1.3 Any person entitled to indemnification herein shall (i) give prompt written notice to the indemnifying party of any claim with respect to which it seeks indemnification (provided that the failure to give prompt notice shall not impair any person’s right to indemnification hereunder to the extent such failure has not materially prejudiced the indemnifying party) and (ii) unless in such indemnified party’s reasonable judgment a conflict of interest between such indemnified and indemnifying parties may exist with respect to such claim, permit such indemnifying party to assume the defense of such claim with counsel reasonably satisfactory to the indemnified party. If such defense is assumed, the indemnifying party shall not be subject to any liability for any settlement made by the indemnified party without its consent (but such consent shall not be unreasonably withheld). An indemnifying party who is not entitled to, or elects not to, assume the defense of a claim shall not be obligated to pay the fees and expenses of more than one counsel for all parties indemnified by such indemnifying party with respect to such claim, unless in the reasonable judgment of any indemnified party a conflict of interest may exist between such indemnified party and any other of such indemnified parties with respect to such claim. No indemnifying party shall, without the consent of the indemnified party, consent to the entry of any judgment or enter into any settlement which cannot be settled in all respects by the payment of money (and such money is so paid by the indemnifying party pursuant to the terms of such settlement) or which settlement does not include as an unconditional term thereof the giving by the claimant or plaintiff to such indemnified party of a release from all liability in respect to such claim or litigation.

4.1.4 The indemnification provided for under this Agreement shall remain in full force and effect regardless of any investigation made by or on behalf of the indemnified party or any officer, director or controlling person of such indemnified party and shall survive the transfer of securities. The Company and each Holder of Registrable Securities participating in an offering also agrees to make such provisions as are reasonably requested by any indemnified party for contribution to such party in the event the Company’s or such Holder’s indemnification is unavailable for any reason.

4.1.5 If the indemnification provided under Section 4.1 hereof from the indemnifying party is unavailable or insufficient to hold harmless an indemnified party as contemplated by Section 4.1.1 and Section 4.1.2, then the indemnifying party, in lieu of indemnifying the indemnified party, shall contribute to the amount paid or payable by the indemnified party as a result of such losses, claims, damages, liabilities and expenses in such proportion as is appropriate to reflect the relative fault of the indemnifying party and the indemnified party, as well as any other relevant equitable considerations. The relative fault of the indemnifying party and indemnified party shall be determined by reference to, among other things, whether the untrue statement of a material fact or omission of a material fact relates to information supplied by, such indemnifying party or indemnified party, and the indemnifying party’s and indemnified party’s relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission; provided, however, that the liability of any Holder under this Section 4.1.5 shall be limited to the amount of the net proceeds received by such Holder in such offering giving rise to such liability. The amount paid or payable by a party as a result of the losses or other liabilities referred to above shall be deemed to include, subject to the limitations set forth in Sections 4.1.1, 4.1.2 and 4.1.3 above, any legal or other fees or charges reasonably incurred by such party in connection with any investigation or proceeding. The parties hereto agree that it would not be just and equitable if contribution pursuant to this Section 4.1.5 were determined by pro rata allocation or by any other method of allocation, which does not take account of the equitable considerations referred to in this Section 4.1.5. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution pursuant to this Section 4.1.5 from any person who was not guilty of such fraudulent misrepresentation.

ARTICLE V

MISCELLANEOUS

5.1 Notices. Any notice or communication under this Agreement must be in writing and given by (i) deposit in the United States mail, addressed to the party to be notified, postage prepaid and registered or certified with return receipt requested, (ii) delivery in person or by courier service providing evidence of delivery, or (iii) transmission by hand delivery, electronic mail or facsimile. Each notice or communication that is mailed, delivered, or transmitted in the manner described above shall be deemed sufficiently given, served, sent, and received, in the case of mailed notices, on the third business day following the date on which it is mailed and, in the case of notices delivered by courier service, hand delivery, electronic mail or facsimile, at such time as it is delivered to the addressee (with the delivery receipt or the affidavit of messenger) or at such time as delivery is refused by the addressee upon presentation. Any notice or communication under this Agreement must be addressed, if to the Company, to: ESS Tech, Inc. 26440 SW Parkway Ave., Bldg. 83, Wilsonville, OR. 97070, with copy to Wilson Sonsini Goodrich & Rosati, 650 Page Mill Road, Palo Alto, CA ###-###-####, Attn: Mark Baudler and Andrew Hoffman, and, if to any Holder, at such Holder’s address or facsimile number as set forth in the Company’s books and records. Any party may change its address for notice at any time and from time to time by written notice to the other parties hereto, and such change of address shall become effective thirty (30) days after delivery of such notice as provided in this Section 5.1.

5.2 Assignment; No Third Party Beneficiaries.

5.2.1 This Agreement and the rights, duties and obligations of the Company hereunder may not be assigned or delegated by the Company in whole or in part.

5.2.2 Prior to the expiration of the Lock-up Period to the extent applicable to such Holder, no Holder may assign or delegate such Holder’s rights, duties or obligations under this Agreement, in whole or in part, except as set forth in Section 5.10.

5.2.3 This Agreement and the provisions hereof shall be binding upon and shall inure to the benefit of each of the parties and its successors and the permitted assigns of the Holders, which shall include Permitted Transferees.

5.2.4 This Agreement shall not confer any rights or benefits on any Persons that are not parties hereto, other than as expressly set forth in this Agreement and Section 5.2 hereof.

5.2.5 No assignment by any party hereto of such party’s rights, duties and obligations hereunder shall be binding upon or obligate the Company unless and until the Company shall have received (i) written notice of such assignment as provided in Section 5.1 hereof and (ii) the written agreement of the assignee, in a form reasonably satisfactory to the Company, to be bound by the terms and provisions of this Agreement (which may be accomplished by an addendum or certificate of joinder to this Agreement). Any transfer or assignment made other than as provided in this Section 5.2 shall be null and void.

5.3 Counterparts. This Agreement may be executed in multiple counterparts (including facsimile or PDF counterparts), each of which shall be deemed an original, and all of which together shall constitute the same instrument, but only one of which need be produced.

5.4 Governing Law; Venue. NOTWITHSTANDING THE PLACE WHERE THIS AGREEMENT MAY BE EXECUTED BY ANY OF THE PARTIES HERETO, THE PARTIES EXPRESSLY AGREE THAT (1) THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED UNDER THE LAWS OF THE STATE OF DELAWARE AS APPLIED TO AGREEMENTS AMONG DELAWARE RESIDENTS ENTERED INTO AND TO BE PERFORMED ENTIRELY WITHIN DELAWARE AND (2) THE VENUE FOR ANY ACTION TAKEN WITH RESPECT TO THIS AGREEMENT SHALL BE ANY STATE OR FEDERAL COURT IN THE STATE OF DELAWARE.

5.5 TRIAL BY JURY. EACH PARTY HERETO ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND, THEREFORE, EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT TO ANY ACTION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT.

5.6 Amendments and Modifications. Upon the written consent of (a) the Company and (b) the Holders of a majority of the total Registrable Securities, compliance with any of the provisions, covenants and conditions set forth in this Agreement may be waived, or any of such provisions, covenants or conditions may be amended or modified; and provided, that any amendment hereto or waiver hereof that adversely affects one Holder, solely in its capacity as a holder of the shares of capital stock of the Company, in a manner that is materially different from the other Holders (in such capacity) shall require the consent of the Holder so affected. No course of dealing between any Holder or the Company and any other party hereto or any failure or delay on the part of a Holder or the Company in exercising any rights or remedies under this Agreement shall operate as a waiver of any rights or remedies of any Holder or the Company. No single or partial exercise of any rights or remedies under this Agreement by a party shall operate as a waiver or preclude the exercise of any other rights or remedies hereunder or thereunder by such party.

5.7 Other Registration Rights. The Company represents and warrants that, other than Persons who acquired Common Stock as part of the PIPE made in connection with the transactions contemplated by the Merger Agreement, no person has any right to require the Company to register any securities of the Company for sale or to include such securities of the Company in any Registration Statement filed by the Company for the sale of securities for its own account or for the account of any other person. Further, the Company represents and warrants that this Agreement supersedes any other registration rights agreement or agreement with similar terms and conditions and in the event of a conflict between any such agreement or agreements and this Agreement, the terms of this Agreement shall prevail.

5.8 Term. This Agreement shall terminate with respect to any Holder on the date that such Holder no longer holds any Registrable Securities. The provisions of Article V shall survive any termination.

5.9 Holder Information. Each Holder agrees, if requested in writing, to represent to the Company the total number of Registrable Securities held by such Holder in order for the Company to make determinations hereunder.

5.10 Additional Holders; Joinder. In addition to Persons who may become Holders pursuant to Section 5.2, the Company may make any Person who acquires Common Stock or rights to acquire Common Stock after the date hereof a party to this Agreement (each such Person, an “Additional Holder”) by obtaining an executed joinder to this Agreement from such Additional Holder in the form of Exhibit A attached hereto (a “Joinder”). Such Joinder shall specify the rights and obligations of the applicable Additional Holder under this Agreement. Upon the execution and delivery and subject to the terms of a Joinder by such Additional Holder, the Common Stock of the Company then owned, or underlying any rights then owned, by such Additional Holder (the “Additional Holder Common Stock”) shall be Registrable Securities to the extent provided herein and therein and such Additional Holder shall be a Holder under this Agreement with respect to such Additional Holder Common Stock.

5.11 Interpretive Provisions. For all purposes of this Agreement, except as otherwise provided in this Agreement or unless the context otherwise requires:

5.11.1 the meanings of defined terms are applicable to the singular as well as the plural forms of such terms;

5.11.2 the words “hereof” and “herein” and words of similar import, when used in this Agreement, refer to this Agreement as a whole and not to any particular provision of this Agreement;

5.11.3 references in this Agreement to any law shall be deemed also to refer to such law, and all rules and regulations promulgated thereunder;

5.11.4 whenever the words “include”, “includes” or “including” are used in this Agreement, they shall mean “without limitation”;

5.11.5 the captions and headings of this Agreement are for convenience of reference only and shall not affect the interpretation of this Agreement; and

5.11.6 pronouns of any gender or neuter or, as appropriate, the other pronoun forms.

5.12 Entire Agreement. This Agreement, together with Exhibit A to this Agreement, the Merger Agreement, the Ancillary Agreements (as such term is defined in the Merger Agreement), constitute the entire agreement among the Parties with respect to the subject matter hereof and thereof and supersede all prior and contemporaneous agreements, understandings and discussions, whether oral or written, relating to such subject matter in any way and there are no warranties, representations or other agreements among the Parties in connection with such subject matter except as set forth in this Agreement and therein.

5.13 Counterparts; Electronic Delivery. This Agreement and any other agreements, certificates, instruments and documents delivered pursuant to this Agreement may be executed and delivered in one or more counterparts and by fax, email or other electronic transmission, each of which shall be deemed an original and all of which shall be considered one and the same agreement. No Party shall raise the use of a fax machine or email to deliver a signature or the fact that any signature or agreement or instrument was transmitted or communicated through the use of a fax machine or email as a defense to the formation or enforceability of a contract and each Party forever waives any such defense.

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

5.15 Subsequent Acquisition of Equity Securities. Any equity securities of the Company acquired subsequent to the date hereof by a Holder shall be subject to the terms and conditions of this Agreement and such equity securities shall be considered to be “Registrable Securities” as such term is used in this Agreement.

[SIGNATURE PAGES FOLLOW]

IN WITNESS WHEREOF, the undersigned have caused this Agreement to be executed as of the date first written above.

[Signature Page to Amended and Restated Registration Rights Agreement]

Exhibit A

REGISTRATION RIGHTS AGREEMENT JOINDER

The undersigned is executing and delivering this joinder (this “Joinder”) pursuant to the Registration Rights Agreement, dated as of [    ], 2021 (as the same may hereafter be amended, the “Registration Rights Agreement”), among ESS Tech, Inc., a Delaware corporation (the “Company”), and the other Persons named as parties therein. Capitalized terms used but not otherwise defined herein shall have the meanings provided in the Registration Rights Agreement.

By executing and delivering this Joinder to the Company, and upon acceptance hereof by the Company upon the execution of a counterpart hereof, the undersigned hereby agrees to become a party to, to be bound by, and to comply with the Registration Rights Agreement as a Holder of Registrable Securities in the same manner as if the undersigned were an original signatory to the Registration Rights Agreement, and the undersigned’s shares of Common Stock shall be included as Registrable Securities under the Registration Rights Agreement to the extent provided therein.

Accordingly, the undersigned has executed and delivered this Joinder as of the [    ] day of [    ], 20[    ].

[Exhibit A]