ESS Tech, Inc. filings document the public-company records of an energy storage manufacturer focused on long-duration iron flow systems. Recent disclosures include Form 8-K reports for operating results and financial condition, material agreements, capital-structure matters, and securities identified as common stock and warrants.
The company's proxy materials cover annual meeting matters, board composition, executive compensation and corporate-governance practices. Other filings record leadership changes, shareholder voting matters, liquidity and financing disclosures, and formal updates tied to commercialization of ESS energy storage products.
ESS Tech, Inc. reported the results of its 2026 annual stockholder meeting held online on May 29, 2026. Of 27,922,991 common shares outstanding as of April 6, 2026, 15,682,283 were present or represented by proxy, providing the voting base for all proposals.
Stockholders elected Class II directors Sandeep Nijhawan and Harry Quarls to serve until the 2029 annual meeting. They ratified KPMG LLP as independent registered public accounting firm for the year ending December 31, 2026, and approved, on an advisory basis, the compensation of named executive officers.
Investors also supported, on an advisory basis, holding future say-on-pay votes every one year. ESS Tech plans to include a say-on-pay proposal in its proxy materials each year until the next required advisory vote on voting frequency.
ESS Tech, Inc. Chief Financial Officer Kate Eileen Suhadolnik reported small open-market sales of company stock primarily to cover tax obligations. On two days, she sold a total of 3,657 shares of ESS Tech common stock at weighted average prices around $0.92–$0.93 per share.
The footnotes state these shares were sold to cover tax withholding obligations tied to the vesting of restricted stock units. After these transactions, she still directly holds 160,757 shares of ESS Tech common stock, indicating she maintains a substantial equity position in the company.
ESS Tech, Inc. officer Kelly F. Goodman reported two open-market sales of Common Stock that were made to cover tax withholding obligations tied to vesting restricted stock units. On May 21 and 22, 2026, Goodman sold a total of 5,233 shares at weighted average prices around $0.92–$0.93 per share. After these transactions, Goodman directly holds 210,620 shares of ESS Tech common stock.
ESS Tech, Inc. Schedule 13G/A amendment shows Alyeska Investment Group, L.P. (with related Alyeska entities) beneficially owns 1,400,000 shares of Common Stock, representing 5.15% of the class as of March 31, 2026. The filing cites 27,173,757 shares outstanding per the Form 10-K dated March 5, 2026. The disclosure is a joint filing; Anand Parekh is named but disclaims beneficial ownership. The statement notes Alyeska Investment Group, L.P. exercises voting and investment control over shares held by Alyeska Master Fund, L.P.
ESS Tech, Inc. reports that Ayrton Capital LLC, Alto Opportunity Master Fund (Segregated Master Portfolio B) and Waqas Khatri each hold 3,018,635 shares of Common Stock beneficially owned through warrants, representing 9.99% of the class as of March 31, 2026.
The filing states the issuable shares are from exercisable Warrants and are subject to a 9.99% beneficial ownership blocker. The 9.99% figures are calculated using 27,173,757 shares outstanding as of February 27, 2026, per the issuer's 10-K.
ESS Tech, Inc. reported Q1 2026 results showing a small business but significant losses and funding pressure. Revenue was only $0.1 million, down sharply from $0.6 million a year earlier, as the company winds down older contracts while focusing on its Energy Base product.
Cost of revenue was $7.2 million, including higher depreciation and inventory reserves, leading to a gross loss of $7.0 million. Operating expenses fell 33% to $6.7 million, mainly from lower sales and marketing and general and administrative costs. Net loss narrowed to $15.9 million, but interest expense of $2.5 million from the Yorkville promissory note and a sale-leaseback weighed on results.
ESS ended the quarter with $15.5 million in cash and cash equivalents and $6.0 million in short‑term investments, for $21.5 million in liquid assets. Management states that continued losses and limited liquidity create substantial doubt about the company’s ability to continue as a going concern over the next 12 months without new debt or equity financing, despite recent financings including an at‑the‑market program, a registered direct offering, and the Yorkville promissory note.
ESS Tech, Inc. reported first quarter 2026 results showing cost controls but still early-stage revenue. Revenue was $128 thousand for the quarter ended March 31, 2026, down from $0.6 million a year earlier as fewer systems were delivered.
Total operating expenses fell 33% to $6.7 million, mainly from lower sales, marketing, and general and administrative spending as the company redirected resources toward product development. Net loss improved to $(15.9) million, or $(0.54) per share, compared with $(18.0) million, or $(1.50) per share, in the prior-year period.
Adjusted EBITDA loss improved 31% year-over-year to $(10.3) million. Net cash used in operating activities decreased to $13.5 million. ESS ended the quarter with $15.5 million in unrestricted cash and cash equivalents and $6.0 million in short-term investments, for total liquidity of $21.5 million, supported by a $15 million registered direct equity offering.
ESS Tech, Inc. filed its Annual Report on Form 10-K for the fiscal year ended December 31, 2025. The company describes its business as a developer and manufacturer of long-duration iron flow batteries (including a patented Proton Pump) designed for ~20,000 cycles and multi-hour storage durations. The report discloses $22.0 million in cash and short-term investments and states there is substantial doubt about the company’s ability to continue as a going concern. The filing lists 27,173,757 shares outstanding as of February 27, 2026, a reported net loss of $63.4 million for 2025, an accumulated deficit of $845.8 million, approximately 315 patents granted/applied-for, and 62 full-time employees as of December 31, 2025.
ESS Tech, Inc. is calling a virtual 2026 annual meeting on May 29, 2026 at 8:00 a.m. Pacific time for holders of 27,922,991 shares of common stock as of April 6, 2026. Stockholders will elect two Class II directors, ratify KPMG LLP as auditor, and cast advisory votes on executive pay and how often future say-on-pay votes occur.
The board recommends voting for both director nominees, for KPMG’s ratification, for approving named executive officer compensation, and for holding say-on-pay votes every one year. The proxy also outlines board independence, committee structures, a prior 1-for-15 reverse stock split, and detailed 2025 compensation for senior executives.
ESS Tech, Inc. reported that director and Founding Chairman Michael Niggli has notified the company he will resign from its Board of Directors, Audit Committee, and Nominating and Corporate Governance Committee, effective as of the 2026 annual meeting of stockholders on May 29, 2026.
The company stated that Mr. Niggli’s resignation is not due to any disagreement regarding operations, policies, or practices. ESS Tech expressed gratitude for his leadership as Founding Chairman and his years of service and contributions to the company.