Cash and short-term investments $124.5 million, improvement of $25 million sequentially Catalyzing a Clean Future. Every Day. 25 Thank You LCNRV – Impact on Cost per Unit Over Time LCNRV = 0 2025 & ESS™ Disclaimers Any financial and operating forecasts and projections contained herein represent certain estimates of ESS as of the date thereof. ESS's independent public accountants have not examined, reviewed or compiled the forecasts or projections and, accordingly, neither expresses an opinion or other form ...

Disclaimers This Presentation contains statistical data, estimates and forecasts that are based on independent industry publications or other publicly available information. This information involves many assumptions and limitations and you are cautioned not to give undue weight to these estimates. We have not independently verified the accuracy or completeness of the data that has been contained in these industry publications and other publicly available information. Accordingly, neither ESS nor its respec ...

ESS Tech, Inc. (NYSE:GWH) Q2 2023 Earnings Conference Call August 8, 2023 5:00 PM ET Company Participants Erik Bylin - Head-Investor Relations Eric Dresselhuys - Chief Executive Officer Tony Rabb - Chief Financial Officer Conference Call Participants Thomas Boyes - TD Cowen Colin Rusch - Oppenheimer Corinne Blanchard - Deutsche Bank Davis Sunderland - Baird Operator Ladies and gentlemen, thank you for standing by. At this time, all participants are in a listen-only mode. Later, we’ll conduct a question-and- ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _______ to ________ Commission file number 001-39525 ESS Tech, Inc. (Exact name of registrant as specified in its charter) (State or other ju ...

ESS Tech, Inc. (NYSE:GWH) Q1 2023 Results Conference Call May 9, 2023 4:30 PM ET Company Participants Eric Dresselhuys - Chief Executive Officer Vince Canino - COO Benjamin Heng - SVP of Engineering Mark Bindon - Vice President of Customer Success Steve Figgatt - CEO, Sycamore International Paul Lau - Manager, Tech Solutions Architect Tony Rabb - Chief Financial Officer Conference Call Participants Colin Rusch - Oppenheimer Chip Moore - EF Hutton Elijah Obasanya - Loop Capital Operator Welcome to ESS Tech, ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _______ to ________ Commission file number 001-39525 ESS Tech, Inc. (Exact name of registrant as specified in its charter) Delaware 98-15501 ...

ESS Tech, Inc. (NYSE:GWH) Q4 2022 Results Conference Call March 1, 2023 5:00 PM ET Company Participants Erik Bylin - Investor Relations Eric Dresselhuys - Chief Executive Officer Tony Rabb - Chief Financial Officer Conference Call Participants Thomas Boyes - Cowen & Co. Colin Rusch - Oppenheimer Davis Sunderland - Baird Joseph Osha - Guggenheim Partners Chip Moore - EF Hutton Chris Kapsch - Loop Capital Operator Ladies and gentlemen, thank you for standing by. At this time, all participants are in a listen- ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _______ to ________ Commission file number 001-39525 (855) 423-9920 Registrant's telephone number, including area code Securities registered purs ...

ESS Tech, Inc. (NYSE:GWH) Q3 2022 Earnings Conference Call November 3, 2022 5:00 PM ET Company Participants Erik Bylin - Investor Relations Eric Dresselhuys - Chief Executive Officer Amir Moftakhar - Chief Financial Officer Conference Call Participants Colin Rusch - Oppenheimer Thomas Boyes - Cowen & Co. Joseph Osha - Guggenheim Partners Chip Moore - EF Hutton Operator Ladies and gentlemen, thank you for standing by. At this time, all participants are in a listen-only mode. Later, we will conduct a question ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR Table of Contents ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _______ to ________ Commission file number 001-39525 ESS Tech, Inc. (Exact name of registrant as specified in its charter) (State or oth ...