What is ESS Inc.?

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.

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Where is ESS Inc.’s corporate headquarters?

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

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Who is ESS Inc.’s Independent auditor?

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

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When did ESS Inc. go public?

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.

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When does ESS Inc.’s fiscal year end?

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

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How are ESS Inc. shares traded?

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

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Does ESS Inc. pay dividends?

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

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Who is ESS Inc.’s transfer agent?

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

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How do I transfer stock, change the address on my shareholder account, or replace a lost stock certificate?

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.

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Does ESS Inc. have a direct stock purchase plan?

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

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How can I purchase ESS Inc. shares?

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

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Whom should I contact regarding investor inquiries?

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

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Where can I find all of the SEC filings for ESS Inc.?

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.

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What is ESS Inc.’s CIK number?

ESS Inc.’s CIK number is 0001819438.

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How can I get a copy of the annual report?

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.

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