ESS Tech 2025: Tiny Iron-Flow Battery Stock Skyrockets 175% on Game-Changing Deal – What Investors Should Know
ESS Tech shares jumped about 175% in pre-market trading on Oct. 10, 2025, after announcing a 10-year, 5 MW/50 MWh iron-flow battery deal with Arizona’s Salt River Project. The company, which remains unprofitable with 2024 sales of $6.3 million and a net loss of $86 million, recently raised $31 million in new funding. GWH closed at $1.72 on Oct. 9, with a Hold consensus from analysts.
