Key Highlights

  • The largest mover of the five is trading 3.46% higher at $2.55 on Wednesday, October 28, 2026, while the other four are trading lower.
  • The four decliners are down 2.27%, 1.72%, 0.82% and 0.45%.
  • Short interest runs from about 29.7% to 37.68% across the four names that report it, on two different bases.
  • The gap between the best and worst move is 5.73 percentage points (calculated).
  • One fuel cell maker reports committed backlog of $1.296 billion and cash of $737.3 million at July 31, 2026.

Which Energy-Transition Stocks Are Moving Most Today, October 28, 2026?

Five energy-transition names are trading with mixed moves on Wednesday, October 28, 2026. T1 Energy (NYSE:TE) is trading 3.46% higher at $2.55 as a solar module maker funding a cell factory. NANO Nuclear Energy (NASDAQ:NNE) is trading 2.27% lower at $12.06 as a small reactor developer. FuelCell Energy (NASDAQ:FCEL) is trading 1.72% lower at $11.97, Eos Energy Enterprises (NASDAQ:EOSE) 0.82% lower at $1.80 and Centrus Energy (NYSEAMERICAN:LEU) 0.45% lower at $108.93.

The names are ranked by the absolute size of each move in percent, from largest to smallest. No company release dated October 28 is cited for any of the five moves. Short interest appears for four of them, but on two bases: Eos and FuelCell are stated as a share of float, while NANO Nuclear and Centrus are calculated against shares outstanding, so those percentages are not directly comparable.

1. T1 Energy: Why Is the Penny Stock Up 3.46% Without a Dated Release?

T1 Energy shares are trading 3.46% higher at $2.55, from an implied prior close near $2.46 (calculated). The most recent news is an October 22 Commerce Department waiver allowing imports of up to 1.725 GW of solar cells to supply the Dallas module plant while the Texas cell factory is built. At about 294.5 million shares, the implied market value is near $751 million (calculated).

Second-quarter net sales were $250.128 million, up about 88% from a year earlier (calculated), but the loss from continuing operations was $36.9 million and adjusted EBITDA of $10.7 million included a $24.4 million tariff-refund benefit. The cell factory budget rose to about $510 million from $425 million, and a $50.0 million add-on of 4.75% convertible notes closed on September 30. The final $18 million installment on a solar intellectual property purchase falls due on October 30, payable in cash or discounted shares.

2. NANO Nuclear Energy: What Does Nearly a Third of Shares Sold Short Mean Here?

NANO Nuclear Energy shares are trading 2.27% lower at $12.06, after a 2.47% decline to $11.86 on Monday, October 26. No dated company release explains the move. The company is developing small modular reactors, including the KRONOS MMR, and the market value is roughly $647.6 million on 53.70 million shares (calculated).

Short interest for the September 30, 2026 settlement was 16,750,169 shares, about 31.2% of shares outstanding (calculated, as float is not reported), with 7.95 days to cover. Cash and short-term investments were about $580 million at June 30. The Nuclear Regulatory Commission docketed the KRONOS construction permit application in May 2026, and an engineering agreement signed October 21 runs three years. Commercial work includes a memorandum of understanding with Supermicro (NASDAQ:SMCI).

3. FuelCell Energy: Why Is a Heavily Shorted Stock Slipping 1.72%?

FuelCell Energy shares are trading 1.72% lower at $11.97, from an implied prior close of about $12.18 (calculated). No release dated today explains the dip. About 79.95 million shares put the market value near $957 million (calculated).

Short interest was 24,465,442 shares, or 32.37% of float, for the September 30, 2026 settlement, with about 4.6 days to cover. Fiscal third-quarter revenue fell to $33.0 million from $46.7 million, and the company signed a purchase agreement with Fit Energy for up to 380 megawatts of fuel cell capacity for data centers, with a 30 megawatt first phase. Cash, equivalents and restricted cash were $737.3 million at July 31, against committed backlog of $1.296 billion.

4. Eos Energy Enterprises: Can a Record Quarter Offset 37.68% of Float Sold Short?

Eos Energy shares are trading 0.82% lower at $1.80 in a session without a new company release. The Pittsburgh-based company makes zinc-based battery energy storage systems. Preliminary third-quarter revenue was $82 million to $83 million, up about 169% to 172% from a year earlier, while GAAP gross margin remained negative 55% to negative 53%.

Short interest was 134,847,658 shares, or 37.68% of float, for the September 30 settlement, with 4.7 days to cover, up about 12.4% in shares from September 15. Backlog was about $765 million, or roughly 3.2 GWh, and total cash including restricted cash was about $344 million. Projects include a West Virginia installation with MN8 Energy and Google (NASDAQ:GOOGL). The full report is due before the market opens on November 5.

5. Centrus Energy: Why Is the Stock Little Changed After an 11.15% Rise?

Centrus Energy shares are trading 0.45% lower at $108.93, a pause after an 11.15% gain on Tuesday, October 27 to $109.42. No company release dated October 27 or October 28 explains either move. Centrus supplies enriched uranium fuel and is expanding enrichment capacity, including high-assay low-enriched uranium. The market value is near $2.17 billion on about 19.95 million shares (calculated).

Short interest for the October 15, 2026 settlement was 5,933,422 shares, about 29.7% of shares outstanding (calculated, not a float measure), with 6.79 days to cover. On October 19 the company announced the roughly $116 million purchase of Westerman Holdings, a centrifuge component supplier. Second-quarter revenue was $176.1 million, 2026 guidance of $450 million to $500 million was maintained, and offtake agreements include Oklo (NYSE:OKLO). The proposed federal fiscal 2027 budget includes no further HALEU operation contract funding.

Energy-Transition Stocks Compared: Move Gaps, Price Gaps and Short-Interest Bases

Every figure in this paragraph is calculated from the moves and prices above. The gap between the largest gain (T1 Energy, up 3.46%) and the steepest decline (NANO Nuclear, down 2.27%) is 5.73 percentage points. T1 Energy's gain is 3.91 percentage points above Centrus's 0.45% decline. At $108.93, a Centrus share costs $106.38 more than a T1 Energy share at $2.55, which says nothing about size: the stated market values run from about $595 million for Eos, as of October 26, to near $2.17 billion for Centrus, about 3.6 times as much.

On short interest, compare like with like. Among float-based figures, Eos at 37.68% is 5.31 percentage points above FuelCell at 32.37% (calculated), both for the September 30 settlement. Among shares-outstanding figures, NANO Nuclear at about 31.2% is 1.5 percentage points above Centrus at about 29.7% (calculated), though the Centrus reading is for October 15. On days to cover, NANO Nuclear's 7.95 is 3.35 days above FuelCell's 4.6 (calculated). The T1 Energy single gives no short-interest figure.

What to Watch Next: The October 30 Payment, November 5 Reports and Short-Interest Updates

T1 Energy's final $18 million installment falls due on Friday, October 30, 2026. FuelCell's fiscal fourth quarter ends October 31, with Phase 0 deliveries and the October production target in focus. Eos reports full third-quarter results before the market opens on November 5, and Centrus holds its shareholder call on Thursday, November 5. The next Centrus short-interest settlement is October 30, with publication expected on November 10, and NANO Nuclear has not stated a date for fiscal year-end results.