New York, Jan 10, 2026, 20:58 EST — The market closed.
- Eos Energy shares surged in the final U.S. session, ensuring the battery maker stays in focus for traders heading into next week.
- Options positioning remains tilted bullish, even as implied volatility stays high.
- Investors will look to the company’s next quarterly report, expected in early March according to market calendars.
Eos Energy Enterprises, Inc. shares surged roughly 9% on Friday, closing at $15.28. The stock fluctuated between $14.01 and $15.49, with heavy trading volume around 23.2 million shares.
Why it matters now: options traders remain locked in on sharp moves. According to data from TheFly, calls overwhelmed puts on Thursday, dragging the put/call ratio down to 0.25, while implied volatility hovered close to 96.1. 1
This setup usually hits hardest in thin-margin plays, where sentiment flips quickly. Eos remains in build-out mode, and its stock often swings more sharply than the wider market on minimal news.
The company, based in the U.S., produces zinc-based battery energy storage systems, promoting longer-duration storage as a supplement to traditional lithium-ion. It competes in a crowded space alongside lithium-ion providers and integrators like Tesla and Fluence Energy, while smaller players target specific long-duration segments.
The latest corporate update came from the boardroom. Eos announced that Russ Stidolph would step down as chair at year-end. Starting Jan. 1, Joseph Nigro will assume the role of non-executive chair. CEO Joe Mastrangelo remarked, “Without Russ’ leadership, there would be no Eos.” 2
Eos is also backed by federal funding. The U.S. Department of Energy’s Loan Programs Office confirmed it finalized a loan guarantee of up to about $305 million for Eos. The funds will support manufacturing lines for zinc-bromine battery storage systems in Pennsylvania. 3
Investors, however, face the flip side: funding and dilution risk. In a November prospectus supplement, the company detailed a sizable stock sale alongside a convertible note offering, cautioning that conversions and associated hedging could weigh on the shares.
U.S. markets are closed for the weekend, so the real question hits Monday: will Friday’s move stick when liquidity returns, or will it vanish just as quickly? Any new update on contracts, production, or funding could quickly shift the mood.
The next big event on the calendar is earnings. Multiple market sources list Eos’ upcoming quarterly report around March 3, but the exact date could change until the company makes it official. 4
