Honeywell-backed trapped-ion leader (Honeywell QS + Cambridge Quantum); Helios system. Went public on Nasdaq (QNT) in June 2026, raising $1.68B at a ~$15.7B market value — the quantum industry's first mega-IPO.
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Quantinuum launched Helios: 98 trapped-ion (barium-137) physical qubits with 99.92% two-qubit-gate fidelity and all-to-all (QCCD) connectivity, running up to 48 error-corrected logical qubits — its most accurate commercial system.
Peer-reviewed in Nature: error correction (carbon & tesseract codes) cut logical error rates up to 800x below the underlying physical qubits on Quantinuum trapped-ion hardware - the largest physical-to-logical gap yet independently validated, with repeated mid-circuit correction across up to 12 logical qubits.
Quantinuum priced an upsized IPO at $60/share, raising $1.68B on Nasdaq (QNT) at a ~$15.7B market value — the quantum industry's first mega-IPO. Honeywell retains ~48% voting power.
