10 Best Performing Utility Stocks in 2025

5. Constellation Energy Corporation (NASDAQ:CEG)

Share Price Gains in 2025: 57.91%

Number of Hedge Fund Holders: 91

Constellation Energy Corporation (NASDAQ:CEG) is the largest private-sector power producer, the largest producer of clean energy, and the leading operator of nuclear power plants in the United States.

Constellation Energy Corporation (NASDAQ:CEG) announced on January 7 that it had completed the acquisition of Calpine Corporation, marking a significant milestone for the company. One of the biggest deals in American power industry history, the $16.4 billion acquisition is expected to add $2 billion to Constellation’s free cash flow on an annual basis. Together, the companies boast 55 gigawatts of capacity from zero- and low-emission sources, including nuclear, natural gas, and geothermal.

Joe Dominguez, President and CEO of Constellation Energy Corporation (NASDAQ:CEG), stated:

“This isn’t just about two great companies coming together – it’s about strengthening America’s future. Constellation is stepping up to power America’s growth when our nation’s demand for energy is surging, and our global competitors are racing to capture AI leadership. By uniting Constellation and Calpine, we’re providing the reliable, clean energy that keeps our communities strong, our businesses competitive and our nation secure.”

Following the merger, S&P Global affirmed Constellation Energy Corporation’s (NASDAQ:CEG) ‘BBB+’ issuer credit rating and maintained its stable outlook. The rating agency also raised its issuer credit rating on Calpine from ‘BB-‘ to ‘BBB+’, as it considers Calpine a core subsidiary of Constellation.

Constellation Energy Corporation (NASDAQ:CEG) has emerged as a key player to power the ongoing AI boom and its data centers. The company signed multiple long-term power purchase agreements with hyperscalers last year and garnered significant attention from investors. As a result, the share price of CEG surged by almost 58% in 2025.