Constellation Energy (CEG) Stock Today — Dec. 19, 2025: Latest News, Analyst Forecasts, and What Wall Street Is Watching Next
Constellation Energy shares fell about 1% to $357.68 by mid-afternoon Dec. 19 after surging nearly 6% the previous day. The stock swung widely as investors reacted to nuclear license extensions in Illinois and final approval for the $16.4 billion Calpine acquisition. Trading volume and volatility remained high amid continued focus on AI-driven power demand.