Constellation Energy (CEG) Stock After Hours Today (Dec. 17, 2025): Why Shares Fell and What to Watch Before Thursday’s Open
Constellation Energy Corporation (NASDAQ: CEG) ended Wednesday, December 17, 2025 with a sharp selloff during regular trading—then bounced in after-hours action as late-breaking grid-market headlines hit the tape. CEG closed the session at $340.97, down 6.74%, after trading between $372.00