Quantinuum

Quantinuum is a quantum computing company formed in 2021 by merging Honeywell Quantum Solutions with Cambridge Quantum. It is headquartered in Broomfield, Colorado, with a major presence in Cambridge, in the United Kingdom, and is led by chief executive officer Rajeeb "Raj" Hazra. The company is majority-owned by Honeywell, which retains roughly 82 percent following its public offering, with Cambridge Quantum stakeholders holding the remainder.

Quantinuum builds trapped-ion quantum computers using a quantum charge-coupled device (QCCD) architecture, in which individual ions are physically shuttled around the chip. This approach delivers all-to-all connectivity together with very high operational fidelity. Its hardware lineup runs from the earlier H1 and H2 systems, which set repeated public records on the Quantum Volume benchmark, to its flagship Helios system, launched commercially in November 2025. Helios offers 98 physical qubits, 48 error-corrected logical qubits, and a 99.921 percent two-qubit gate fidelity, the highest reported for any commercial quantum system.

The company went public on the Nasdaq on June 4, 2026 under the ticker QNT, raising approximately $1.68 billion at a valuation of roughly $15.7 billion — the largest quantum computing IPO to date. Its strategic direction is Generative Quantum AI, or GenQAI, which combines quantum-generated data with conventional AI models. This rests on a deep partnership with NVIDIA, integrating NVIDIA GB200 GPUs and the NVQLink interconnect, and is complemented by the open-source lambeq toolkit for Quantum Natural Language Processing.

Quantinuum systems are accessible through the Quantinuum Nexus cloud platform and Microsoft Azure Quantum. Its enterprise customers include Amgen, BMW, JPMorganChase, and SoftBank.