Quantinuum is trading 4.82% higher at $51.77 as broader U.S. equity markets moved higher on September 25, 2026. - The S&P 500, Nasdaq Composite, and Dow Jones were all higher, supporting a broader risk-on backdrop. - No clear company-specific announcement or analyst action was identified for September 25. - Quantinuum’s Quantum World Congress participation continued through September 25 and appears scheduled rather than a new catalyst.