Quantum computing stocks are surging across the board this afternoon, with all three pure-play names rallying in midday trading. The move has reignited a debate that’s defined the sector all year. Which quantum name has actually delivered for shareholders in 2026? The answer, at least through the May 5 close, is clear. IonQ (NYSE:IONQ) is ... Which Quantum Computing Stock Has Dominated in 2026: IonQ, Rigetti, or D-Wave?