Investor FAQs

ESS Inc. designs, builds and deploys environmentally sustainable, low-cost, iron flow batteries for long-duration commercial and utility-scale energy storage applications requiring flexible energy capacity. The Energy Warehouse™ and Energy Center™ use earth-abundant iron, salt, and water for the electrolyte, resulting in an environmentally benign, long-life energy storage solution for the world’s renewable energy infrastructure. Established in 2011, ESS Inc. enables project developers, utilities, and commercial and industrial facility owners to make the transition to more flexible non-lithium-ion storage that is better suited for the grid and the environment.

26440 SW Parkway Ave., Bldg. 83
Wilsonville, OR. 97070
Phone: (855) 423-9920

ESS Inc.’s independent auditor is Ernst & Young LLP.

In May 2021, ESS Inc. entered into a merger agreement with ACON S2 Acquisition Corp. (NASDAQ: STWO), a publicly traded special purpose acquisition company. The merger between ESS Inc. and ACON S2 Acquisition Corp. was completed on October 8, 2021 and the combined company’s common stock began trading on the New York Stock Exchange under its new ticker symbol, GWH, on October 11, 2021.

ESS Inc.’s fiscal year end is December 31.

Shares of ESS Inc. are traded on the New York Stock Exchange under the ticker symbol GWH.

ESS Inc. currently does not pay dividends on its common stock.

ESS Inc.’s transfer agent is Computershare Investor Services. To contact Computershare please visit: https://www-us.computershare.com/Investor/#Contact.

If you lose a certificate, change your address, or if you have any other stock certificate-related questions, please contact the company's transfer agent Computershare at: https://www-us.computershare.com/Investor/#Contact.

ESS Inc. currently does not have a direct stock purchase plan.

To purchase common stock in ESS Inc. please contact your brokerage firm.

You can contact investor relations at investors@essinc.com.

ESS Inc.’s financial documents can be found on the SEC Filings section of the Investor Relations website, or directly from the Securities and Exchange Commission website at: https://www.sec.gov/edgar/searchedgar/companysearch.html.

ESS Inc.’s CIK number is 0001819438.

ESS Inc.’s annual reports (Form 10-K) can be found on the SEC Filings section of the Investor Relations website, or directly from the Securities and Exchange Commission website at: https://www.sec.gov/edgar/searchedgar/companysearch.html.

Warrants of ESS Tech, Inc. (“ESS” or the “Company”) to purchase shares of Common Stock of the Company (the “Common Stock”) that are publicly traded on the New York Stock Exchange under the ticker symbol “GWH.W,” (“Public Warrants”) will become exercisable at or any time after November 7, 2021. Public Warrants are exercisable for one share of Common Stock at a price of $11.50 per share, subject to adjustments (the “Exercise Price”).

Holders of Public Warrants wishing to exercise must do so prior to 5:00 p.m. New York City time on October 8, 2026 (the “Expiration Date”), unless they are redeemed earlier by the Company (see below for more information about redemption).Note that, if you hold Public Warrants through a broker, you should contact your broker to determine your broker’s procedure for exercising your Public Warrants.

The CUSIP Number is 26916J1144.

The easiest way is to contact your brokerage firm. In order to exercise your Public Warrants, your brokerage firm will contact the Depository Trust Company (“DTC”), who will in turn deliver to the Company’s Warrant Agent, Computershare Inc., the $11.50 per share Exercise Price paid by you and the exercise instruction. (The exercise is not “cashless” – you will have to pay $11.50 per share to effect the exercise.) The brokerage firm will notify DTC of your desire to exercise the warrants and should be able to provide both DTC and Computershare the necessary documents. Warrants will be deemed to be exercised on the business day upon which your broker instructs through DTC and receives the Exercise Price remittance in cleared funds. If you are holding the warrants directly on the register, rather than with a broker, please send a completed and signed notice of exercise to the address below, enclosing a check for the Exercise Price. Warrants will be deemed to be exercised on the business day upon which Computershare receives the notice in good order and the Exercise Price in cleared funds. For these purposes, “business day” means any day (excluding a Saturday or a Sunday) on which banks in New York City are open for business. For information, you may also contact:

Yes. If (i) the closing price of the Common Stock equals or exceeds $18.00 per share (subject to certain adjustments) for any 20 trading days within a 30-trading day period ending on the third trading day prior to proper notice of such redemption and provided that certain other conditions are met, or (ii) the closing price of the Common Stock equals or exceeds $10.00 per public share (subject to adjustments) for any 20 trading days within the 30-trading day period ending on the third trading day prior to proper notice of such redemption and provided that certain other conditions are met (the “Redemption Date”), then the Company has the ability to redeem the outstanding Public Warrants at any time after they become exercisable and prior to their Expiration Date, within 30 days of delivering a written notice of redemption to the holders.

Should the Company elect to redeem the Public Warrants, you may (i) exercise your Public Warrants in cash in accordance with Section 2 of this FAQ, or, (ii) exercise your Public Warrants on a “cashless basis,” rather than paying the Company the Exercise Price in cash. Note, Public Warrants may only be exercised on a “cashless basis” should the Company deliver a written notice of redemption to the holders.

To effect a cashless exercise, you would be deemed to pay the Exercise Price by surrendering the fair market value of the Common Stock calculated by the reference table set forth on page 236 of the Company’s final prospectus (Registration No. 333-257232), which can be found here: https://www.sec.gov/Archives/edgar/data/1819438/000119312521272876/d129808d424b3.htm.

Accordingly, by virtue of the cashless exercise of Public Warrants, exercising warrant holders will receive the net value of a share of Common Stock for each Public Warrant surrendered for exercise, and will not pay any separate cash exercise price to the Company. If any holder of Public Warrants would, after taking into account all of such holder’s Public Warrants exercised at one time, be entitled to receive a fractional interest in a share of Common Stock, the number of shares the holder will be entitled to receive will be rounded down to the nearest whole number of shares.

Cashless exercise reduces the dilution to the Company’s stockholders by settling the net value of Public Warrants in shares of Common Stock (i.e., by reducing the number of shares of Common Stock issued) without raising the cash that would be received by the Company in the case of a cash exercise of Public Warrants.

Redemption of the outstanding warrants could force you to (i) exercise your Public Warrants and pay the Exercise Price therefor at a time when it may be disadvantageous for you to do so, (ii) sell your Public Warrants at the then-current market price when you might otherwise wish to hold your Public Warrants, or (iii) accept the nominal redemption price which, at the time the outstanding warrants are called for redemption, we expect would be substantially less than the market value of your warrants.

Any Public Warrants that remain unexercised by the Redemption Date will be redeemed for a price of $0.01 per Public Warrant (the “Redemption Price”). Those remaining Public Warrants will be delisted, void and no longer exercisable, and the holders will have no rights with respect to those Public Warrants, except to receive the Redemption Price.

Additional information concerning the Company’s warrants can be found in the Company’s final prospectus (Registration No. 333-257232), which can be found here: https://www.sec.gov/Archives/edgar/data/1819438/000119312521272876/d129808d424b3.htm.