Quantum Computing is trading 4.4% higher at $9.48 in pre-market amid a broader rally in quantum-computing stocks. - IonQ’s reported real-time quantum-error-correction breakthrough led sector gains, while several peers also advanced. - Quantum Computing is presenting an integrated quantum-security platform at ECOC 2026 on September 23, combining quantum-key distribution and hardware-based identity authentication. - Available coverage does not establish the presentation as the direct catalyst.