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Sunday, November 15, 2026

ESS Tech files Chapter 7 and ceases operations

Infrastructure Friday, November 13, 2026 - Updated Nov 13, 2026 18:23

ESS Tech, the Oregon maker of iron flow batteries for long-duration grid storage, ceased operations on Friday and filed a voluntary Chapter 7 petition in the US Bankruptcy Court for the District of Delaware.

Why it matters: Chapter 7 is a liquidation, not a reorganisation, so one of the few US makers of long-duration iron flow storage ends as a going concern, with a court trustee to sell its assets and pay claims in the Bankruptcy Code's order of priority.

Data as of ESS Tech, Inc. Form 8-K, Items 1.03, 2.04, 5.02 and 8.01, filed November 13, 2026 (accession 0001819438-26-000091), read in full from SEC EDGAR. Developing item.

ESS Tech said in its Form 8-K that, after considering all strategic alternatives, it ceased operations on November 13, 2026 and filed a voluntary petition for relief under Chapter 7 of the Bankruptcy Code in the District of Delaware. A Chapter 7 trustee will be appointed and will assume control over the company’s assets and liabilities, effectively eliminating the authority of its board and officers, and the assets will be liquidated with claims paid in the priorities the Bankruptcy Code specifies. The company said it is unlikely that holders of its common stock will receive any payment or other distribution on account of their shares, and it cautioned that trading in the stock is highly speculative.

Concurrently with the petition, the company terminated all employees and officers without cause, including chief executive Drew Buckley, chief financial officer Kate Suhadolnik and general counsel and chief strategy officer Kelly Goodman. The filing said the petition may trigger events of default under certain of the company’s contracts and debt instruments, subject to the automatic stay, and that the company will no longer have the capability to prepare or file its annual report or any other periodic reports with the SEC.

Sources

  1. ESS Tech, Inc. Form 8-K, Items 1.03, 2.04, 5.02 and 8.01, bankruptcy filing (accession 0001819438-26-000091) - ESS Tech, Inc., via SEC EDGAR - 2026-11-13