IonQ (IONQ) Stock After Hours: Why Shares Fell on Dec. 15, 2025—and What to Watch Before the Market Opens Dec. 16
IonQ, Inc. (NYSE: IONQ) ended Monday’s session sharply lower and stayed soft in extended trading, as investors digested a cluster of insider Form 4 filings alongside fresh news highlighting intensifying global competition in quantum computing. Below is a clear, publication-ready