NEW YORK, Jan 2, 2026, 12:36 ET — Regular session
- Eos Energy Enterprises shares rose about 13% in midday trading, outpacing a broad-but-choppy U.S. open.
- Other U.S.-listed energy-storage stocks also climbed, pointing to a sector-led move.
- High short interest in Eos has amplified past swings, making the stock prone to sharp intraday runs.
Shares of Eos Energy Enterprises, Inc. jumped about 13% to $12.95 by midday on Friday, with about 8.8 million shares traded. The stock ranged from $11.56 to $12.98.
The move matters because energy-storage stocks have been among the market’s most momentum-driven names, where small shifts in risk appetite can trigger big price swings.
It also comes as investors reopen books for the first full session of 2026, a window that often brings fresh positioning and short-covering — when traders who bet against a stock buy it back to limit losses.
The rise was not isolated. Fluence Energy was up about 14%, Stem rose about 11%, and ESS Tech gained nearly 9% in midday trade.
Eos has carried elevated short interest, a measure of how many shares have been sold short relative to the tradable float. As of mid-December, about 82.8 million Eos shares were sold short, around 29.7% of the public float, MarketBeat data showed. 1
The company also entered 2026 with a board change that became effective Jan. 1, when Joseph Nigro succeeded Russell Stidolph as non-executive chair, a filing showed. 2
The last major company update was its quarterly report in November, when Eos reported $30.5 million in revenue for the third quarter and reaffirmed full-year revenue guidance of $150 million to $160 million. It also disclosed a commercial pipeline of $22.6 billion and backlog of $644.4 million as of Sept. 30, and highlighted deals tied to grid reliability and data-center demand. 3
Eos, which makes zinc-based battery energy storage systems — large-scale batteries used to store power for later use — has also pointed to government-backed financing as a key part of its capital plan. A prior filing referenced a loan guarantee agreement with the U.S. Department of Energy and amendments to its credit arrangements. 4
Broader market tone remained cautious, but investors were watching whether early-January flows favor high-volatility growth names. “When you turn the page for a new year… you’re waiting to see… what’s going to be the vibe,” Thomas Martin, senior portfolio manager at Globalt in Atlanta, said. 5
Macro catalysts are close. The U.S. employment report for December is scheduled for Jan. 9 at 8:30 a.m. ET, a release that can reset expectations for Federal Reserve policy and risk assets. 6
Rate expectations matter for capital-intensive energy-transition plays, including battery storage, where project financing costs and customer demand can shift with interest rates. The Fed’s next policy meeting is scheduled for Jan. 27–28, according to its calendar. 7
