\nESS Tech, Inc. (\u201cESS,\u201d \u201cESS, Inc.\u201d or the \u201cCompany\u201d) (NYSE:GWH), a leading manufacturer of iron flow long-duration energy storage (\u201cLDES\u201d) systems for commercial and utility-scale applications, today announced financial results for its fourth quarter and full year ended December 31, 2025.<\/p>\n
\n\u201cThe fourth quarter of 2025 and 2026 to date has seen the Company make continued progress in advancing our proprietary LDES and strengthening ESS for the next phase of execution,\u201d said Drew Buckley, Chief Executive Officer of ESS. \u201cWe have taken decisive steps to reinforce leadership, governance, and financial discipline in support of long-term value creation, including a leadership and organizational reset that more closely aligns management and board oversight around execution and capital allocation. We also expanded our commercial capabilities through the acquisition of VoltStorage GmbH\u2019s intellectual property and asset base, an iron-salt battery company, adding experienced personnel and strengthening our ability to execute our go-to-market priorities. We are also seeing a supportive macro backdrop for LDES, as rising electricity demand and increasing grid reliability requirements are driving greater urgency for resilient, long-duration solutions. Commercial momentum was highlighted by a $9.9 million award supporting deployment of up to 27 MWh of American-made LDES at U.S. military installations, and by Google\u2019s recently announced participation in Project New Horizon as we advance the project toward manufacturing in 2026. With three tier 1 foundational projects expected to begin delivery in 2027, we are focused on executing across our pipeline as projects move to delivery and commissioning.\u201d<\/p>\n
2026 Outlook<\/b><\/p>\n Fiscal Year 2025 and Subsequent Highlights<\/b><\/p>\n Fiscal Year 2025 Financial Highlights<\/b><\/p>\n \nKate Suhadolnik, ESS’ Chief Financial Officer, commented, \u201cWe have prioritized balance sheet improvements, with financing initiatives that strengthen liquidity, enable meaningful debt repayment, and provide flexibility to support operations. These steps contributed to improved operating performance and a meaningful year-over-year improvement in adjusted EBITDA. We ended 2025 with $14.5 million in cash and cash equivalents and $7.5 million in short term investments, and we completed a $15 million registered direct offering after year end.\u201d<\/p>\n Conference Call Details<\/b><\/p>\n \nESS’ Chief Executive Officer Drew Buckley and Chief Financial Officer Kate Suhadolnik will host the conference call, followed by a question-and-answer period. The call will be accompanied by a presentation, which will be available following the call via the investor relations segment of the Company\u2019s website at http:\/\/investors.essinc.com\/<\/a>.<\/p>\n \nTo access the call, please use the following information:<\/p>\n Date<\/b>:<\/p>\n<\/td>\n \nThursday, March 5, 2026<\/p>\n<\/td>\n<\/tr>\n Time:<\/b><\/p>\n<\/td>\n \n5:00 p.m. Eastern Time (2:00 p.m. Pacific Time)<\/p>\n<\/td>\n<\/tr>\n Dial-in:<\/b><\/p>\n<\/td>\n \n1-833-470-1428<\/p>\n<\/td>\n<\/tr>\n International Dial-in<\/b>:<\/p>\n<\/td>\n \n1-646-844-6383<\/p>\n<\/td>\n<\/tr>\n Conference Code:<\/b><\/p>\n<\/td>\n \n547200<\/p>\n<\/td>\n<\/tr>\n Webcast<\/b>:<\/p>\n<\/td>\n https:\/\/events.q4inc.com\/attendee\/987783929<\/a><\/b><\/p>\n<\/td>\n<\/tr>\n<\/table>\n \nA telephone replay will be available through March 12, 2026, by dialing 1-866-813-9403 from the U.S., or 1-929-458-6194 from international locations, and entering replay pin number: 217487. The replay can also be viewed through the webcast link above and the presentation utilized during the call will be available via the investor relations section of the Company\u2019s website at http:\/\/investors.essinc.com\/<\/a>.<\/p>\n About ESS, Inc.<\/b><\/p>\n ESS Tech, Inc.<\/b><\/p>\n Statements of Operations and Comprehensive Loss<\/b><\/p>\n (Unaudited, in thousands, except share and per share data)<\/b><\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n Three Months Ended \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n 2025<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n 2024<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Revenue:<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nRevenue<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(1,612<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n2,801<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nRevenue – related parties<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n24<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n49<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nTotal revenue<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(1,588<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n2,850<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Cost of revenue<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n8,111<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n16,038<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Gross loss<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(9,699<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(13,188<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n Operating expenses<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nResearch and development<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n3,368<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n2,706<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nSales and marketing<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n220<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,887<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nGeneral and administrative<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n4,606<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n5,716<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nTotal operating expenses<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n8,194<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n10,309<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nLoss from operations<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(17,893<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(23,497<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n Other (expense) income, net<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nInterest (expense) income, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(5,245<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n477<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \n(Loss) gain on revaluation of common stock warrant liabilities<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(115<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(344<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nOther expense, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(730<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(115<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nTotal other (expense) income, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(6,090<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n18<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Net loss and comprehensive loss to common stockholders<\/b><\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(23,983<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(23,479<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Net loss per share – basic and diluted<\/b><\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(1.20<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(1.97<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Weighted average shares used in per share calculation – basic and diluted<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n19,930,834<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n11,926,137<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n ESS Tech, Inc.<\/b><\/p>\n Statements of Operations and Comprehensive Loss<\/b><\/p>\n (Unaudited, in thousands, except share and per share data)<\/b><\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n Years Ended December 31,<\/b><\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n 2025<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n 2024<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Revenue:<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nRevenue<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(796<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n5,712<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nRevenue – related parties<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n2,379<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n583<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nTotal revenue<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,583<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n6,295<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Cost of revenue<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n29,255<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n51,653<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Gross loss<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(27,672<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(45,358<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n Operating expenses<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nResearch and development<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n8,297<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n11,772<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nSales and marketing<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n3,834<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n9,161<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nGeneral and administrative<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n17,604<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n23,507<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nTotal operating expenses<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n29,735<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n44,440<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nLoss from operations<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(57,407<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(89,798<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n Other (expense) income, net<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nInterest (expense) income, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(5,455<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n3,574<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nGain on revaluation of common stock warrant liabilities<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n229<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n115<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nOther expense, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(807<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(113<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nTotal other (expense) income, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(6,033<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n3,576<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Net loss and comprehensive loss to common stockholders<\/b><\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(63,440<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(86,222<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Net loss per share – basic and diluted<\/b><\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(4.34<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(7.32<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Weighted average shares used in per share calculation – basic and diluted<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n14,601,626<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n11,773,596<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n ESS Tech, Inc.<\/b><\/p>\n Balance Sheets<\/b><\/p>\n (Unaudited, in thousands, except share data)<\/b><\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n December 31, \n\u00a0<\/p>\n<\/td>\n December 31, Assets<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Current assets:<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nCash and cash equivalents<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n14,477<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n13,341<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nRestricted cash, current<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n806<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n906<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nAccounts receivable, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n13<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n215<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nShort-term investments<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n7,557<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n18,263<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nInventory<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n140<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n5,641<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nPrepaid expenses and other current assets<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n3,254<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n4,998<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Total current assets<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n26,247<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n43,364<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nProperty and equipment, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n17,224<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n20,582<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nIntangible assets, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n2,682<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n4,656<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nOperating lease right-of-use assets<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n3,767<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,503<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nRestricted cash, non-current<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n618<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n948<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nOther non-current assets<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n634<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n760<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Total assets<\/b><\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n51,172<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n71,813<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Liabilities and stockholders\u2019 equity<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Current liabilities:<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nAccounts payable<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n3,023<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n8,070<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nAccrued and other current liabilities<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n11,097<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n9,315<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nAccrued product warranties<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n985<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n3,288<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nOperating lease liabilities, current<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,784<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,692<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nDeferred revenue, current<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n359<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n5,237<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nFinancing obligations, current<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n8,044<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Total current liabilities<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n25,292<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n27,602<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nOperating lease liabilities, non-current<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n2,060<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nDeferred revenue, non-current – related parties<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n5,297<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n14,400<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nCommon stock warrant liabilities<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n573<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n802<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nFinancing obligations, non-current<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n9,291<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nOther non-current liabilities<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n41<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n125<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Total liabilities<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n42,554<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n42,929<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Stockholders\u2019 equity:<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nPreferred stock ($0.0001 par value; 200,000,000 shares authorized, none issued and outstanding as of December 31, 2025 and 2024)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nCommon stock ($0.0001 par value; 1,000,000,000 shares authorized, 22,377,003 and 11,986,516 shares issued and outstanding as of December 31, 2025 and 2024, respectively)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n2<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nAdditional paid-in capital<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n854,435<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n811,262<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nAccumulated deficit<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(845,819<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(782,379<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n Total stockholders\u2019 equity<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n8,618<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n28,884<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Total liabilities and stockholders\u2019 equity<\/b><\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n51,172<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n71,813<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n ESS Tech, Inc.<\/b><\/p>\n Consolidated Statements of Cash Flows<\/b><\/p>\n (Unaudited, in thousands)<\/b><\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n Years Ended December 31,<\/b><\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n 2025<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n 2024<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Cash flows from operating activities:<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Net loss<\/b><\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(63,440<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(86,222<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nAdjustments to reconcile net loss to net cash used in operating activities:<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nDepreciation and amortization<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n5,740<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n4,724<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nAsset abandonment<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,707<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nNon-cash interest (income) expense<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n4,981<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(2,422<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nNon-cash lease expense<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,526<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,350<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nStock-based compensation expense<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n5,434<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n11,575<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nChange in fair value of common stock warrant liabilities<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(229<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(115<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nOther non-cash (income) expenses, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n388<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n459<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nChanges in operating assets and liabilities:<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nAccounts receivable, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n202<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,549<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nInventory<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n4,833<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(3,326<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nPrepaid expenses and other assets<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,870<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(1,620<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nAccounts payable<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(3,842<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n4,243<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nAccrued and other liabilities<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(2,841<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(1,123<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nAccrued product warranties<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(2,303<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,159<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nDeferred revenue<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(2,672<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(918<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nOperating lease liabilities<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(1,638<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(1,532<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n Net cash used in operating activities<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(50,284<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(72,219<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Cash flows from investing activities:<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nPurchases of property and equipment<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(3,387<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(7,294<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nMaturities and purchases of short-term investments, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n10,915<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n72,051<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Net cash provided by investing activities<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n7,528<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n64,757<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Cash flows from financing activities:<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nProceeds from issuance of common stock and common stock warrants, net of issuance costs<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n37,651<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nProceeds from financing arrangements<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n27,028<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nDebt issuance costs<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(308<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nPayments on financing obligations<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(21,049<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nProceeds from stock options exercised<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n83<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n86<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nRepurchase of shares from employees for income tax withholding purposes<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(50<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(297<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nProceeds from contributions to Employee Stock Purchase Plan<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n107<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n385<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Net cash provided by financing activities<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n43,462<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n174<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Net change in cash, cash equivalents and restricted cash<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n706<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(7,288<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n Cash, cash equivalents and restricted cash, beginning of period<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n15,195<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n22,483<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n Cash, cash equivalents and restricted cash, end of period<\/b><\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n15,901<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n15,195<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n ESS Tech, Inc.<\/b><\/p>\n Consolidated Statements of Cash Flows (continued)<\/b><\/p>\n (Unaudited, in thousands)<\/b><\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n Years Ended December 31,<\/b><\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n 2025<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n 2024<\/b><\/p>\n<\/td>\n<\/tr>\n Supplemental disclosures of cash flow information:<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nCash paid during the year for:<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nOperating leases included in cash used in operating activities<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n1,776<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n1,738<\/p>\n<\/td>\n<\/tr>\n \nInterest<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n520<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n<\/tr>\n \nNon-cash investing and financing transactions:<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nPurchase of property and equipment included in accounts payable and accrued and other current liabilities<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n28<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,586<\/p>\n<\/td>\n<\/tr>\n \nAdjustment to right-of-use assets from lease modification<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n3,790<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n686<\/p>\n<\/td>\n<\/tr>\n \nTransfers between inventory and property and equipment, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n668<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,051<\/p>\n<\/td>\n<\/tr>\n \nApplication of deferred revenue to financing obligations<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n6,518<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nCash and cash equivalents<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n14,477<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n13,341<\/p>\n<\/td>\n<\/tr>\n \nRestricted cash, current<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n806<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n906<\/p>\n<\/td>\n<\/tr>\n \nRestricted cash, non-current<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n618<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n948<\/p>\n<\/td>\n<\/tr>\n \nTotal cash, cash equivalents and restricted cash<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n15,901<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n15,195<\/p>\n<\/td>\n<\/tr>\n ESS Tech, Inc.<\/b><\/p>\n Reconciliation of GAAP Net Loss to Adjusted EBITDA<\/b><\/p>\n (Unaudited, in thousands)<\/b><\/p>\n<\/td>\n<\/tr>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n Twelve Months Ended \n\u00a0<\/p>\n<\/td>\n Twelve Months Ended \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n 2025<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n 2024<\/b><\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nNet loss<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(63,440<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(86,222<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nInterest expense (income), net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n5,455<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(3,574<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nStock-based compensation<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n5,434<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n11,575<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nDepreciation and amortization<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n5,740<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n4,724<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nGain on revaluation of common stock warrant liabilities<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(229<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n(115<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n \nEnvironmental, Health & Safety compliance estimate<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u2014<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n899<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nFinancing costs<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,948<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n1,267<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nOther expense, net<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n807<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n113<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n<\/tr>\n \nAdjusted EBITDA<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(44,285<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n \n\u00a0<\/p>\n<\/td>\n \n$<\/p>\n<\/td>\n \n(71,333<\/p>\n<\/td>\n \n)<\/p>\n<\/td>\n<\/tr>\n<\/table>\n \n\u00a0<\/p>\n View source version on businesswire.com: <\/span>https:\/\/www.businesswire.com\/news\/home\/20260305499859\/en\/<\/a><\/span><\/p>\n Company Investor Relations KEYWORDS:<\/b> Oregon United States North America<\/p>\n INDUSTRY KEYWORDS:<\/b> Technology Manufacturing Batteries Other Energy Utilities Green Technology Alternative Energy Environment Energy Engineering Sustainability<\/p>\n\n
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\n \n \u00a0<\/td>\n<\/tr>\n \n \n \n \n \u00a0<\/td>\n<\/tr>\n \n \n \n
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December 31,<\/b><\/p>\n<\/td>\n<\/tr>\n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \u00a0<\/td>\n<\/tr>\n<\/table>\n \n
\n \n \n \n \u00a0<\/td>\n<\/tr>\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \u00a0<\/td>\n<\/tr>\n<\/table>\n \n
\n \n \n \n \n \n \u00a0<\/td>\n<\/tr>\n \n \n \n
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2025<\/b><\/p>\n<\/td>\n\n \n
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2024<\/b><\/p>\n<\/td>\n<\/tr>\n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \u00a0<\/td>\n<\/tr>\n<\/table>\n \n
\n \n \n \n \u00a0<\/td>\n<\/tr>\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \u00a0<\/td>\n<\/tr>\n<\/table>\n \n
\n \n \n \n \u00a0<\/td>\n<\/tr>\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \u00a0<\/td>\n<\/tr>\n<\/table>\n \n
\n \n \n \n \n \n \n \u00a0<\/td>\n<\/tr>\n \n \n \n \n
\n
December 31,<\/b><\/p>\n<\/td>\n\n \n
\n
December 31,<\/b><\/p>\n<\/td>\n<\/tr>\n\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n <\/p>\n
\n<\/b>
investors@essinc.com<\/a><\/p>\n
\n<\/b>
Chris Tyson
\n
Executive Vice President
\n
MZ Group – MZ North America
\n
Phone: (949) 491-8235
\n
GWH@mzgroup.us
\n<\/a>
www.mzgroup.us<\/a><\/p>\n
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