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RESS INC Catalyzing a Cleaner Future . Every Day . Second Quarter 2026 Financial Results Conference Call Sodium - ion and iron flow energy storage for utility , data center , defense and infrastructure customers . NYSE : GWH Earnings Conference Call August 11 , 2026
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1 No part of this presentation may be reproduced, photocopied, redistributed or passed on, directly or indirectly, to any other person, or published, in whole or in part, for any purpose without the consent of ESS Tech, Inc. (“ESS” or the “Company”). Forward-Looking Statements This presentation contains forward-looking statements (including within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended, and Section 27A of the Securities Act of 1933, as amended) concerning the Company and other matters that involve substantial risks and uncertainties. These statements may discuss the management team's goals, beliefs, hopes, intentions and expectations as to future plans, trends, events, results of operations and financial condition and the related potential effects on ESS, or otherwise, based on current beliefs of the management of the Company, as well as assumptions made by, and information currently available to the Company's management. These forward-looking statements can be identified by the use of forward-looking terminology, including the words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intends,” “may,” “might,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “will,” “would,” or, in each case, their negative or other variations or comparable terminology may identify forward-looking statements, but the absence of these words does not mean that a statement is not forward-looking. These forward-looking statements, which are subject to risks, uncertainties and assumptions about us, may include projections of our future financial performance, our anticipated growth strategies and anticipated trends in our business. Examples of forward-looking statements include, among others, statements pertaining to statements made by the Company’s Chief Executive Officer and Chief Financial Officer, the Company’s sodium-ion strategy and the early-stage opportunities approaching $1 billion identified for its sodium-ion solutions, the timeline for development and market rollout of the Bridge system and the expected specifications relating to the same and timing for commercial operation, the letter of intent with Juniper Energy and the potential deployment of 500 MWh or more of energy storage systems and timing related to the same, the letter of intent with Alsym Energy, the Company’s plans to streamline its Wilsonville operations and reduce expenses and cash burn, statements pertaining to the Company’s 2026 outlook and beyond, cash position, the potential and capabilities of the Company’s technology and platform, advancement of operational and commercialization priorities, the Company’s ability to execute on Project New Horizon, including the timing for manufacturing and delivery for Project New Horizon, expectations regarding data center and AI infrastructure demand and the Company’s expanded focus on those markets, third-party market projections regarding hyperscaler capital expenditures, U.S. electricity generation shortfalls and the deployment of battery storage in data centers; statements relating to the Alsym Energy letter of intent; the Company’s ability to convert customer interest and opportunities into near-term revenue; as well as statements regarding the Company’s partnerships, employees, commercial expectations regarding sales order, the proposed business combination (“Proposed Transaction”) and the non-binding letter of intent relating thereto, including the expected combined enterprise value, the potential premium to the Company’s market capitalization, the expected timing for entering into definitive agreements and completing the Proposed Transaction, the expected ownership of the combined company by the Company’s stockholders, and the anticipated benefits of the Proposed Transaction, ESS product development and manufacturing, and relationships with customers. Many factors could cause actual future events to differ materially from the forward-looking statements in this communication. There can be no assurance that the future developments affecting ESS will be those that we have anticipated. These forward-looking statements involve a number of risks, uncertainties (some of which are beyond ESS’s control) or other assumptions that may cause actual results or performance to be materially different from those expressed or implied by these forward-looking statements, which include, but are not limited to: our ability to raise capital in the near future; barriers we face in our attempts to produce our energy storage products; the demand for our sodium-ion solutions and the Bridge system not developing as anticipated; our ability to realize and capitalize on sodium-ion opportunities; our ability to generate near-term revenue; delays in the development of our sodium-ion products; our ability to execute definitive agreements with, and deliver to, customers including Juniper Energy; our strategy to allocate resources toward sodium-ion solutions not achieving the anticipated benefits or adversely affecting development of our iron flow technology; our cash burn and cash runway; our ability to secure or maintain a domestic supply chain; risks related to the Company’s ability to execute and meet timelines related to Project New Horizon; our products being in the early stage of commercialization and aspects of our technology not having been fully field tested; our inability to develop our business and effectively commercialize our energy storage products; our dependence on third-party suppliers; our ability to secure or maintain long-term supply relationships with critical suppliers; delays, disruptions or quality control problems in our manufacturing operations; our ability to adequately control our costs, effectively scale our operations and achieve our cost reduction strategy; our reliance on complex machinery; our ability to increase our production capacity; product recalls, defects or performance problems with our products; required maintenance being performed incorrectly or maintenance requirements exceeding our current expectations; our history of losses; our ability to continue as a “going concern”; our ability to secure binding orders; failure to deliver the benefits offered by our technology; inability to achieve market acceptance of our products; our ability to sell effectively to large customers; failure to accurately estimate future supply and demand for our products and services; failure to manage our growth effectively; failure to meet the obligations under our sales contracts and service agreements; our ability to complete projects on schedule and within budget; loss of a member of our senior management or other key personnel; changes to our leadership team; expansions into new markets, product lines or services; our warranty obligations; failure to identify or complete commercial or financial transactions; the non-binding letter of intent for the Proposed Transaction may be terminated at any time and may not result in definitive agreements or a completed transaction on the anticipated terms, timeline or valuation, or at all; the parties’ ability to complete due diligence and to negotiate and execute definitive transaction agreements on the anticipated timeline or at all related to the Proposed Transaction; the parties’ ability to satisfy the conditions to, and to consummate, the Proposed Transaction, including obtaining required regulatory approvals and the approval of ESS’s stockholders; our ability to realize the anticipated benefits of the Proposed Transaction; the potential dilution to, and the allocation of combined company ownership ultimately received by, our stockholders; the receipt of required corporate, stockholder and regulatory approvals for the Proposed Transaction; our ability to maintain compliance with the continued listing standards of the New York Stock Exchange; risks relating to the integration of the two businesses and higher than anticipated transaction and integration costs; difficulties and delays in integrating the combined business resulting from the Proposed Transaction; the combined company’s ability to access additional capital on acceptable terms; the ability of the combined business to retain key customers, employees and relationships; the parties’ ability to raise additional capital to fund the combined company’s business plan; cash flow and access to capital; changes in the global trade environment; our relationships with related parties; regulatory challenges; our ability to protect our intellectual property; general economic and market conditions as well as geopolitical developments and other risks and uncertainties described more fully in the section titled “Risk Factors” in the Company's Annual Report on Form 10-K filed on March 5, 2026, in the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2026 and the Company's other filings with the U.S. Securities and Exchange Commission. Except as required by law, ESS is not undertaking any obligation to update or revise any forward-looking statements whether as a result of new information, future events or otherwise. Market and Industry Data This presentation contains statistics, estimates and other information concerning our industry and the markets in which we operate, including market size, growth rates and projected demand that are based on or derived from independent third-party sources, industry publications and the Company’s own internal estimates and assumptions. The Company has not independently verified this information, and it involves a number of assumptions and limitations. Projections, forecasts and estimates are inherently uncertain, and past performance and modeling are not indicative of future results. You should not place undue reliance on this information. Trademarks ESS may own or have rights to various trademarks, service marks and trade names used in connection with the operation of its business. This presentation may also contain marks of third parties, which are the property of their respective owners. Use or display of third-party marks is not intended to imply a relationship with, or endorsement or sponsorship by or of, ESS. Use of Non-GAAP Financial Measures In this presentation and the accompanying earnings call, ESS includes Adjusted EBITDA, which is a non-GAAP performance measure that ESS uses to supplement its results presented in accordance with U.S. GAAP. As required by the rules of the Securities and Exchange Commission (“SEC”), ESS has provided herein a reconciliation of the non-GAAP financial measures contained in this presentation and the accompanying earnings call to the most directly comparable measures under GAAP. ESS’ management believes Adjusted EBITDA is useful in evaluating its operating performance and is a similar measure reported by publicly-listed U.S. companies, and regularly used by securities analysts, institutional investors, and other interested parties in analyzing operating performance and prospects. By providing this non- GAAP measure, ESS’ management intends to provide investors with a meaningful, consistent comparison of ESS’ profitability for the periods presented. Adjusted EBITDA is not intended to be a substitute for net income/loss or any U.S. GAAP financial measure and, as calculated, may not be comparable to other similarly titled measures of performance of other companies in other industries or within the same industry. ESS defines and calculates Adjusted EBITDA as net loss before interest expense (income), net, stock-based compensation, depreciation, amortization and asset abandonment, gain on revaluation of common stock warrant liabilities, legal contingency, financing costs and other income, net as they are not indicative of business operations. Additional Information and Where to Find It In connection with the Proposed Transaction and depending on the final structure of the Proposed Transaction, the Company expects to file with the Securities and Exchange Commission (the “SEC”) a registration statement on Form S-4 (as may be amended, the “Registration Statement”), which would include a preliminary proxy statement of ESS and a prospectus (the “Proxy Statement/Prospectus”). Alternatively, ESS may file a standalone proxy statement. In either case, the definitive proxy statement (or definitive Proxy Statement/Prospectus) and other relevant documents will be mailed to ESS’s stockholders as of a record date to be established for voting on the Proposed Transaction and any other matters as described in the Proxy Statement/Prospectus. ESS may also file other documents regarding the Proposed Transaction with the SEC. This presentation does not contain all of the information that should be considered concerning the Proposed Transaction and is not intended to form the basis of any investment, voting or any other decision in respect of the Proposed Transaction. BEFORE MAKING ANY VOTING OR INVESTMENT DECISION, INVESTORS AND STOCKHOLDERS OF ESS AND OTHER INTERESTED PARTIES ARE URGED TO READ, WHEN AVAILABLE, THE PRELIMINARY PROXY STATEMENT/PROSPECTUS AND ANY AMENDMENTS THERETO, AND THE DEFINITIVE PROXY STATEMENT/PROSPECTUS AND ALL OTHER RELEVANT DOCUMENTS FILED OR THAT WILL BE FILED WITH THE SEC IN CONNECTION WITH ESS’s SOLICITATION OF PROXIES FOR THE SPECIAL MEETING OF ITS STOCKHOLDERS TO BE HELD TO APPROVE THE PROPOSED TRANSACTION AND OTHER MATTERS AS DESCRIBED IN THE PROXY STATEMENT/PROSPECTUS BECAUSE THESE DOCUMENTS WILL CONTAIN IMPORTANT INFORMATION ABOUT ESS, THE COUNTERPARTY TO THE PROPOSED TRANSACTION (THE “COUNTERPARTY”), THE COMBINED COMPANY AND THE PROPOSED TRANSACTION. Investors and security holders will be able to obtain free copies of the Registration Statement and the Proxy Statement/Prospectus (when available) and all other documents filed or that will be filed with the SEC by ESS, the Counterparty or the combined company without charge, once available, on the SEC’s website at www.sec.gov. NEITHER THE SEC NOR ANY STATE SECURITIES REGULATORY AGENCY HAS APPROVED OR DISAPPROVED THE PROPOSED TRANSACTION DESCRIBED HEREIN, PASSED UPON THE MERITS OR FAIRNESS OF THE PROPOSED TRANSACTION OR ANY RELATED TRANSACTIONS OR PASSED UPON THE ADEQUACY OR ACCURACY OF THE DISCLOSURE IN THIS PRESENTATION. ANY REPRESENTATION TO THE CONTRARY CONSTITUTES A CRIMINAL OFFENSE. Participants in the Solicitation ESS, the Counterparty and their respective directors and executive officers may be deemed under SEC rules to be participants in the solicitation of proxies from ESS’s stockholders in connection with the Proposed Transaction. A list of the names of ESS’s directors and executive officers and information regarding their interests in the Proposed Transaction and their ownership of ESS securities are, or will be, contained in ESS’s filings with the SEC, including the Proxy Statement/Prospectus relating to the Proposed Transaction. Additional information regarding the persons who may, under SEC rules, be deemed participants in the solicitation of ESS’s stockholders in connection with the Proposed Transaction, including the names and interests of ESS’s and the Counterparty’s directors and executive officers, will be set forth in the Proxy Statement/Prospectus relating to the Proposed Transaction when it is filed with the SEC. Investors and security holders may obtain free copies of these documents as described above. No Offer or Solicitation This presentation is for informational purposes only and is not a proxy statement or solicitation of a proxy, consent or authorization with respect to any securities or in respect of the Proposed Transaction, and shall not constitute an offer to sell or exchange, or the solicitation of an offer to buy or exchange, any securities of ESS, the Counterparty or the combined company, or any commodity or instrument or related derivative, nor shall there be any sale of any such securities in any state or jurisdiction in which such offer, solicitation, sale or exchange would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of the Securities Act of 1933, as amended (the “Securities Act”), or an exemption therefrom. Investors should consult with their counsel as to the applicable requirements for a purchaser to avail itself of any exemption under the Securities Act. Disclaimers
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2 Agenda Second Quarter 2026 Earnings Call O N T H E C A L L T O D A Y 1 Corporate Overview 2 Operational Highlights 3 New Product — Bridge 4 Business Combination 5 Financial Updates Drew Buckley Chief Executive Officer Kate Suhadolnik Chief Financial Officer Platform, products and positioning Q2 business updates and commercial progress The modular sodium-ion battery energy storage system Proposed transaction: LOI terms, process and timing Second quarter results, Adjusted EBITDA and liquidity A replay and this presentation will be available in the investor relations section of the Company’s website following the call. 6 Closing Summary Priorities and de-risking milestones
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3 Corporate Overview ESS is an energy storage company specializing in sodium- ion and iron flow battery technology. • Bridge sodium-ion BESS: a 1.2 MWh AC modular block for short- and medium- duration storage. • Energy Base iron flow: 10- to 20-hour+ long-duration systems for 24/7 renewable power. • Earth-abundant chemistry: iron, salt and water for iron flow; non-flammable sodium-ion cells, no thermal runaway. • Domestic platform: U.S. design, assembly and controls, with 8.5 GWh of U.S.- made sodium-ion cells under LOI with Alsym. • Scaled capacity and IP: established U.S. manufacturing footprint and a broad patent portfolio. • Tier 1 opportunities: Salt River Project and Google, Juniper Energy and a major California utility, an existing Florida utility customer, and the U.S. Air Force Research Laboratory. THE AI BUILD-OUT Capex Acceleration HYPERSCALERS SCALING DATA CENTER INVESTMENT Power Constraints GENERATION LAGGING AI-DRIVEN LOAD GROWTH Storage Imperative BATTERIES MOVING INSIDE THE DATA CENTER Reflects the Company’s view of AI infrastructure market conditions. See disclaimers.
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4 Q2 2026 and Subsequent Highlights ● Streamlined Wilsonville operations to reduce expenses and cash burn, reallocating capital toward sodium-ion and related solutions to complement iron flow. ● As of the date of this release, repaid $37 million of the $40 million principal amount outstanding under the Yorkville promissory note. ● On August 6, 2026, announced a non-binding letter of intent for a proposed business combination with a private company in the energy sector. ○ Expected combined enterprise value of approximately $515 million, with the allocation to ESS at a premium to its market capitalization at the time of signing of definitive agreement ○ Complementary partner with an established operating platform and a track record of proven commercial execution; definitive agreements targeted for September 2026. ○ The letter of intent is non-binding and remains subject to diligence, definitive documentation and required approvals. An inflection quarter: AI-driven demand accelerating sodium-ion to complement iron flow. ● Announced the acceleration of U.S.-made sodium-ion BESS development following strong early customer interest. ○ Early-stage opportunities approaching $1 billion across data center, critical infrastructure and utility markets. ● Signed a letter of intent with Alsym Energy to add 8.5 GWh of U.S.- made sodium-ion cells and modules to the Company’s portfolio. ● Aligned resources to support an expanded focus on AI infrastructure and data center markets. ● Subsequent to quarter end, began the market rollout of the Bridge modular sodium-ion battery energy storage system. ● Subsequent to quarter end, signed a letter of intent with Juniper Energy LLC for 500 MWh or more of sodium-ion storage. ○ Partnership is anchored by a planned 10 MW / 80 MWh energy storage project for a major California utility; commercial operation targeted in 2027. WHY NOW: 2x U.S. data center power demand by 2030 & 20–25 GW of batteries expected inside data centers by 2030 SODIUM-ION ACCELERATION COMPANY UPDATES Sources: S&P Global and IEA (data center power demand); industry estimates (data center battery storage).
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5 Bridge — A Modular Sodium-Ion BESS Purpose-built for AI data center duty cycles. First module built and in testing at Wilsonville. SYSTEM SPECIFICATIONS 1.2 MWh AC Modular Block Stackable 10-ft container; 4.8 MWh on a standard 20-ft pad • Cell technology: Sodium-ion • Grid connection: 480 Vac standard • Cycle rate: 2C to C/16 • Operating temperature: -40° to 50° C • Cooling: Simple air cooling • Container: 10-ft, stackable • Controls: BMS + EMS WHY IT WINS Built for AI Data Center Duty Cycles High-rate micro-cycling where lithium-ion degrades • Non-flammable chemistry: no thermal runaway, no toxic off-gassing • No complex HVAC or liquid cooling; simpler to install and maintain • Plug-and-play AC block: forklift installable at standard 480 Vac • Wide temperature range capability suits data center micro-cycling duty • 8.5 GWh of U.S.-made cells and modules under LOI with Alsym Energy BUILT FOR AI LOADS: GPU clusters swing tens of megawatts in seconds. Bridge delivers high-rate cycling where lithium degrades. 1.2 MWh PER BLOCK 4.8 MWh PER 20-FT PAD 2–16 HOUR DURATION 20 YEAR DESIGN LIFE BRIDGE AC BLOCK Technology Update: First Na-Ion module charging and discharging in Wilsonville HQ, first Bridge targeted for 2026
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6 Commercial Momentum Signed sodium-ion commitments alongside broadening interest from existing and prospective customers. SODIUM-ION · NEW Juniper Energy 500+ MWh Letter of Intent signed subsequent to quarter end • Framework for a long-term partnership covering 500 MWh or more of sodium-ion BESS by 2032. • Anchored by a planned 10 MW / 80 MWh project with a major utility in California. • Expected to use the Bridge modular sodium-ion AC solution and an ESS EMS. • Commercial operation targeted in 2027. CUSTOMER ENGAGEMENT Existing & New Customers Growing Opportunities Interest broadening across target markets • Strong interest from existing relationships as well as new prospective customers. • Active discussions underway on additional energy storage opportunities. • Tier 1 counterparties across data center, critical infrastructure and utility markets. SUPPLY Alsym Energy 8.5 GWh U.S.-made sodium-ion cells and modules • Letter of intent to add 8.5 GWh of U.S.-made cells and modules to the portfolio • Extends the non-lithium platform into short- and medium-duration applications • Historically served by lithium-ion battery systems Approaching $1B EARLY-STAGE SODIUM-ION OPPORTUNITIES 500+ MWh JUNIPER LETTER OF INTENT ESTIMATED BY 2032 8.5 GWh ALSYM CELLS & MODULES UNDER LOI $37M OF $40M YORKVILLE NOTE REPAID
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7 Proposed Business Combination Non-binding letter of intent signed August 6, 2026 • Established, revenue-generating operating platform with a track record of proven commercial execution • Combined enterprise value of approximately $515 million • Premium to ESS market capitalization at signing of the definitive agreement • ESS stockholders would own approximately 5–10% of the combined company at close • Subject to significant additional work, including the completion of diligence, negotiation and execution of definitive agreements and board, stockholder and regulatory approvals, as well as final valuations which can change before the definitive agreements are signed • Definitive agreements targeted for September 2026 At a Glance ~$515 Million Combined Enterprise Value ~5%-10% ESS Shareholder Allocation of the combined company Priced at a Premium Definitive Agreement Target Reflects the Company’s view of AI infrastructure market conditions. See disclaimers.
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8 Financial Results ($ in millions, except per share data) Q2 2026 Q2 2025 Change (%) Revenue $0.1 $2.4 (97%) Cost of Revenue $7.5 $7.5 n/m Gross Profit (Loss) $ (7.4) $ (5.1) (45%) Operating Expenses $7.7 $6.5 (19%) Profit (Loss) from Operations $ (15.1) $ (11.6) (31%) Net Income (Loss) $ (15.6) $ (11.1) (41%) Net Loss per Share – Basic and Diluted $ (0.46) $ (0.90) 49% Adjusted EBITDA (Loss) $ (7.9) $ (7.8) (2%) Q2 2026 Financial Highlights • Loss per share improved 49% year-over-year to $(0.46) from $(0.90). • First-half operating expenses declined 12% year-over-year to $14.5 million. • Research and development investment up $0.8 million, or 55%, driven by personnel- related expenses. • Sales and marketing expense down 57% on lower personnel, outside services and marketing costs. Spending reallocated toward the sodium-ion platform as legacy contracts wind down. $14.5M 1H’26 OPERATING EXPENSES DOWN 12% $(1.00) 1H’26 LOSS PER SHARE IMPROVED 58% $22.4M 1H’26 OPERATING CASH USE DOWN 27% Figures may not foot due to rounding. Percentage changes are presented as improvement (positive) or deterioration (negative) versus the prior-year period. See the Form 10-Q for complete financial statements.
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9 Reconciliation of GAAP Net Loss to Adjusted EBITDA ($ in millions) Q2 2026 Q2 2025 Change (%) Net loss $ (15.6) $ (11.1) (41%) Interest expense (income), net $0.6 $ (0.0) (2,087%) Stock-based compensation $0.7 $1.7 (59%) Depreciation, amortization and asset abandonment $5.0 $1.5 225% Gain on revaluation of common stock warrant liabilities $ (0.2) $ (0.5) (64%) Financing costs $— $0.6 n/m Legal contingency $1.5 $— n/m Other income, net $ (0.0) $ (0.0) (8%) Adjusted EBITDA (Loss) $ (7.9) $ (7.8) (2%) Q2 2026 Highlights • First-half loss from operations improved 3% year-over-year to $28.9 million. • Stock-based compensation declined 59% year- over-year to $0.6 million. • Adjusted EBITDA loss of $(7.9) million versus $(7.8) million, excluding $5.0 million of non- cash depreciation, amortization and asset abandonment. ADJUSTED EBITDA EXCLUDES: depreciation, amortization & asset abandonment · stock-based compensation · interest · financing costs · legal contingency · warrant revaluation Figures may not foot due to rounding. Percentage changes are presented as improvement (positive) or deterioration (negative) versus the prior-year period. Refer to the Form 10-Q for the underlying amounts in thousands.
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10 Cash & Financing ($ in millions) 6/30/26 12/31/25 Change Cash¹ $10.8 $14.5 $ (3.6) Short-term Investments $— $7.6 $ (7.6) Cash¹ & Short-term Investments $10.8 $22.0 $ (11.2) Other Liquid Assets A/R $0.0 $0.0 $— Inventory $0.1 $0.1 $ (0.0) Total $11.0 $22.2 $ (11.2) ¹Reflects unrestricted cash and cash equivalents. Excludes restricted cash of $1.7 million at June 30, 2026. Figures may not foot due to rounding. See the Form 10-Q for the Company’s liquidity and going concern discussion. Cash & Financing Update • First-half operating cash use declined 27% year-over-year to $22.4 million. • Financing activities provided $12.9 million, net, including $13.6 million from the January offering. • $37 million of the $40 million Yorkville note principal has been repaid to date. • As of July 31, 2026, the Company had approximately $5.6 million in cash, cash equivalents and short-term investments. Continued reduction in operating cash burn alongside disciplined capital allocation. $10.8M UNRESTRICTED CASH AT JUNE 30, 2026 $37M OF $40M YORKVILLE NOTE REPAID (27%) YOY REDUCTION IN CASH BURN
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11 Closing Summary Commercial Momentum • Letter of intent for a proposed business combination with a private company in the energy sector with expected combined enterprise value of approximately $515 million • Juniper Energy LOI for 500+ MWh; 10 MW / 80 MWh California anchor project • Alsym Energy LOI for 8.5 GWh of U.S.-made cells and modules • Active discussions with existing and prospective Tier 1 customers on additional storage opportunities Expanded Product Platform • Bridge market rollout underway; spans the 2- to 16-hour spectrum • Energy Base iron flow remains the flagship 10–20+ hour solution • Approaching $1B of early-stage sodium-ion opportunities identified Balance Sheet & Discipline • First-half operating expenses down 12% YoY to $14.5 million • First-half operating cash burn down 27% YoY to $22.4 million • $37M of the $40M Yorkville note repaid; $5.6 million cash at 7/31/2026 Potential De-Risking Milestones Ahead • First module built and testing in process at Wilsonville headquarters this week • First operational Bridge product expected toward the end of 2026 • Definitive documents on business combination expected September 2026
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N Y S E: G W H Questions & Answers Catalyzing a Cleaner Future. Every Day. C O M P A N Y ESS Tech, Inc. 26440 SW Parkway Ave, Bldg. 83 Wilsonville, OR 97070 investors@essinc.com I N V E S T O R R E L A T I O N S Chris Tyson Executive Vice President, MZ Group — MZ North America (949) 491-8235 GWH@mzgroup.us essinc.com