In this article, we are going to discuss the energy stocks that are gaining this week.

The recent plunge in crude oil and natural gas prices has pushed the S&P 500 Energy index to fall by over 2.9% between December 12 and December 19, underperforming the overall S&P 500. That said, it has been a positive few days for the American nuclear energy and uranium sector, especially with the recent rebound in nuclear fuel prices.

The American nuclear energy renaissance continues, and it was reported on December 17 that the federal government granted 20-year license extensions for another two nuclear facilities in Illinois, following through on President Trump’s order in May to cut down on regulations and fast-track new licenses.

Efforts to revive the sector also extend across the border, and on December 19, it was announced that New York has signed an MoU with the Canadian province of Ontario to collaborate on advancing nuclear energy technologies, including small modular reactors (SMRs) and large-scale nuclear facilities. It is worth noting that Ontario is already leading the way in nuclear technology and is currently building the first small modular reactors in the G7.

Our Methodology

To collect data for this article, we used several stock screeners to identify energy stocks that surged the most between December 12 and December 19, 2025. The following are the Energy Stocks that Gained the Most This Week. The stocks are ranked according to their share price surge during this period.

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10. Energy Fuels Inc. (NYSEAMERICAN:UUUU)

Share Price Gains Between Dec. 12 and Dec. 19: 3.43%

Energy Fuels Inc. (NYSEAMERICAN:UUUU) is a leading US-based critical minerals company, focused on uranium, rare earth elements, heavy mineral sands, vanadium, and medical isotopes.

Energy Fuels Inc. (NYSEAMERICAN:UUUU) shot up on December 19 when the company announced that its high-purity dysprosium oxide had passed all initial quality benchmarks of a South Korean automotive manufacturer for use in rare earth permanent magnet (REPM) production. Dy oxide is a key additive in REPMs, which help power electric vehicles, advanced robotics, and several crucial defense systems.

Mark S. Chalmers, CEO of Energy Fuels Inc. (NYSEAMERICAN:UUUU), stated:

“Production of dysprosium oxide that meets stringent magnet specifications is yet another key milestone in the Company’s critical materials strategy, demonstrating Energy Fuels’ unique and rapidly expanding capabilities in the rare earth sector, and in particular our ability to produce high-purity separated ‘heavy’ rare earth oxides from monazite at our White Mesa Mill in Utah. This achievement is even more notable by the fact our dysprosium oxide was validated by a well-known third-party end-user. I commend our creative and hardworking team at the Mill for this impressive accomplishment.”

Also on December 19, Texas Capital initiated coverage of Energy Fuels Inc. (NYSEAMERICAN:UUUU) with a ‘Buy’ rating and a price target of $20, indicating an upside potential of almost 33% from the current share price. The analyst firm acknowledged Energy Fuels’  White Mesa Mill’s status as the only conventional uranium mill operating in the US. Based in Utah, the facility has a licensed production capacity of 8 million pounds annually.

9. Core Natural Resources, Inc. (NYSE:CNR) 

Share Price Gains Between Dec. 12 and Dec. 19: 3.98%

Core Natural Resources, Inc. (NYSE:CNR) is a world-class producer and exporter of high-quality, low-cost coals, including metallurgical and high calorific value thermal coals.

Core Natural Resources, Inc. (NYSE:CNR) received a boost on December 18 when the company revealed that it had resumed longwall operations at its Leer South metallurgical mine in West Virginia. The longwall operations at the site had been idle since the beginning of the year due to a combustion-related event. The company sealed the affected area of the mine and successfully retrieved its equipment, which was generally in good condition despite the prolonged shutdown.

Core Natural Resources, Inc. (NYSE:CNR) now expects a significant improvement in financial performance due to the restart at Leer South. Moreover, the company reported that its West Elk longwall mine in Colorado is also now operating at consistent productivity levels following its transition to the B-Seam.

Jimmy Brock, Chairman and CEO of Core Natural Resources, Inc. (NYSE:CNR), commented:

“On behalf of the entire board and management team, I commend the operations team for making safety their highest priority in the successful recovery, repositioning, and restart of the longwall system. In addition, we want to again extend our appreciation to federal, state and local regulatory officials for their collaboration and support. Leer South is a highly strategic asset, and we fully expect this world-class operation to execute at a high level in 2026 and beyond. While the issues at Leer South and West Elk adversely affected Core’s performance in 2025, we are looking forward to strong cost improvement and profitability at both these operations going forward.”