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ESS Tech Inc
26440 Sw Parkway Ave., Bldg. 83
Phone: (302) 674-4089p:302 674-4089 WILSONVILLE, OR  97070  United States Ticker: GWHGWH
Business Summary
ESS Tech, Inc. is a provider of non-lithium energy storage solutions. Through sodium-ion and iron flow battery technologies, it uses predominantly earth-abundant materials to deliver energy storage. It manufactures and assembles battery modules, housings, energy management systems, and other key battery components. Its integrated energy storage solutions consist of Bridge, Horizon, and Command. Bridge is a modular integrated AC sodium-ion battery energy storage system designed for utilities, AI data centers, commercial and industrial facilities, and critical infrastructure. Horizon is an iron flow battery energy storage system. Command is an energy management platform designed to maximize the performance, availability and profitability of battery energy storage systems. The Company serves utilities, independent power producers, commercial, and industrial customers. Its non-lithium systems operate a range of temperatures without complicated HAVAC systems or complex liquid cooling.
(Source: 6-K)

Scores and Ratings
FRISK®
Score		 Z''
Score		 PAYCE®
Score		 DBT
Index		 Moody's
Rating		 Fitch
Rating		 DBRS
Rating
YesYes-Yes---

Financials, News and Filings
Latest
Statement		 Last
Audit
News		 SEC
Filings		 Bankruptcy
Filings		 Suit &
Judgment
Filings		 Tax
Lien
Filings
6/30/202612/31/2025YesYes---

Industries
SIC Code Description
3691 Storage batteries
6770 Blank checks

Officers and Directors

Title
Name
Age		 Title
Date		 Start
Date
Lead Independent Chairman of the Board Harry F.Quarls 73 8/28/2023 8/28/2023
Chief Executive Officer, Director DrewBuckley 42 1/23/2026 1/1/2026
Chief Financial Officer KateSuhadolnik 37 1/1/2026 8/1/2025
4 additional Officers and Directors records available in full report.

Business Names
Business Name
ESS Tech Subsidiary, Inc.
GWH
STWO
STWOU

General Information
Number of Employees: 62 (As of 12/31/2025)
Outstanding Shares: 40,274,150 (As of 9/2/2026)
Shareholders: 16
Stock Exchange: NYSE
Federal Tax Id: 981550150
Fax Number: (302) 674-5266


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Wednesday, September 23, 2026