IonQ, D-Wave Quantum, Quantum Computing, Quantinuum, and Horizon Quantum Computing Pte. Quantum computing stocks are shares of companies involved in developing, producing, or supporting quantum computing technologies, including quantum processors, software, hardware, and related services. These companies had the highest dollar trading volume of any Quantum Computing stocks within the last several days. Get alerts:IonQ (IONQ)IonQ, Inc. engages in the development of general-purpose quantum computing systems in the United States. D-Wave Quantum (QBTS)D-Wave Quantum Inc. develops and delivers quantum computing systems, software, and services worldwide.