New York, Jan 12, 2026, 12:58 PM ET — Regular session
- Shares of Eos Energy Enterprises surged in midday trading, adding to a rollercoaster ride for the small-cap battery company.
- EOSE’s heavy short interest has fueled sharp swings, particularly when volume spikes.
- Attention now turns to the company webcast on Jan. 14 for fresh details on manufacturing and funding.
Eos Energy Enterprises shares surged almost 10% Monday, hitting $16.76 by midday and pushing the battery producer back onto momentum watchlists after a strong start. The stock fluctuated between $14.95 and $17.14, with roughly 19.6 million shares changing hands.
This move is significant since Eos has turned into a stock that can gap up during after-hours trading. Once the bid hits, it often triggers short-covering and quick-turn traders, causing a surge in activity.
Heading into mid-January, that same setup is back as investors try to gauge how swiftly Eos can convert factory capacity and financing into shipped systems and paid invoices. The market has shown it’s ready to reward “progress” headlines — but just as ready to punish any hint of delay.
By early afternoon, the stock neared its average daily trading volume, indicating the surge wasn’t driven by just a handful of odd-lot trades. Finviz data shows the average volume sits around 21.7 million shares.
Fluence Energy, a player in energy storage, climbed roughly 3% by midday, providing some support to the sector as a whole, though Eos still led the gains.
Short interest—shares borrowed and sold by investors betting on a price drop—hit roughly 82.8 million shares, about 29.7% of the public float as of Dec. 15, according to MarketBeat data. The short-interest ratio clocked in at 4.8 days, indicating how long it might take shorts to cover based on average trading volume.
Eos has an “Eos in Focus” webcast set for Jan. 14 at 8:30 a.m. ET, coming up soon.
Wall Street sees both upside and danger. JPMorgan kicked off coverage in December, assigning a neutral rating and a $16 price target. The bank highlighted the company’s domestic supply chain but flagged “above-average execution risk,” according to a note summary featured by The Fly and a separate report. 1
Eos sought to buy itself time with fresh capital. In late November, it closed a $600 million convertible notes offering alongside a roughly $458 million registered direct stock sale. The company framed these moves as efforts to boost liquidity and support manufacturing growth. (Convertible notes are debt that can later convert into shares, which may dilute existing shareholders.) “This was an opportunistic move to strengthen Eos for the scale in front of us,” Nathan Kroeker, the chief commercial officer and interim CFO, said then. 2
The bigger picture involves ongoing federal backing for domestic battery production. In December 2024, Eos secured a $303.5 million loan guaranteed by the U.S. Department of Energy’s Loan Programs Office, Utility Dive reported then.
The downside risk is clear: the stock’s volatility runs both ways, and execution remains crucial. Any hiccup in factory ramp-up, delays from customers, or trouble securing funding could quickly sour sentiment — particularly given the heavy short interest already on the books.
