Constellation Energy shares surge 6.19% intraday as AI-driven nuclear power partnerships and Calpine acquisition boost growth prospects.

Constellation Energy (CEG) surged 6.19% intraday following the completion of its $12.6 billion acquisition of Calpine Corporation on January 7, 2026, creating the largest electricity producer in the U.S. with 55 GW of generating capacity and a 90% carbon-free portfolio. The transaction, approved after resolving regulatory hurdles with the U.S. Department of Justice, expanded Constellation’s nuclear and renewable assets, including 21 nuclear reactors, and solidified its role in powering AI infrastructure through partnerships with Microsoft and Meta. Recent strategic moves, such as the $1 billion federal loan-backed restart of the Crane Clean Energy Center and NRC approvals for nuclear plant modernization, further reinforced investor confidence in the company’s ability to meet surging demand from AI-driven data centers. These developments, coupled with a bullish outlook for earnings growth (10% CAGR through 2028) and long-term PPAs with tech giants, directly aligned with the stock’s intraday rally.