Constellation Energy (CEG) Stock on December 6, 2025: Calpine Deal Cleared, AI Power Demand Surges and Wall Street Sees More Upside
Constellation Energy closed at $359.82 on December 5, 2025, with a market cap near $112 billion after delivering a 311% total return over three years. The company cleared its final regulatory hurdle for the $16.4 billion Calpine acquisition following a Department of Justice agreement. Trading volume topped 2 million shares. The stock’s 52-week range spans $160.94 to $412.70.