Despite its status as the largest pure-play quantum computing firm by market capitalization, IonQ Inc. (NYSE: IONQ) has proven not to be the most stable bet in recent weeks. Shares have fallen about 35% in the last month, and despite a strong Q1 2026 in many respects, the firm's losses per share are widening. Add to that a sky-high price-to-sales (P/S) ratio of 113.3, and it's clear that, in spite of its wins, IonQ could be ripe for disruption.
While investors may be tempted by other flashy names like D-Wave Quantum Inc. (NYSE: QBTS) and Rigetti Computing (NASDAQ: RGTI)—both of which have strengths but also challenges—there is another group of often-overlooked challengers that may warrant closer examination. At the top of this list are Quantinuum (NASDAQ: QNT) and Quantum Computing Inc. (NASDAQ: QUBT).
