Quantinuum
The world's largest integrated quantum computing company
Quantum
📍 Broomfield, CO
Founded 2021
Current Valuation
$11B
as of 2025-Q4
DECACORN
Quantinuum is the world's largest integrated quantum computing company, formed in 2021 from the merger of Honeywell Quantum Solutions and Cambridge Quantum. The company develops trapped-ion quantum hardware (H-Series) and full-stack quantum software, and last raised at a $10.8B valuation in November 2025 led by Honeywell.
Company Profile
Growth
Trapped-ion qubit fidelity records; commercial enterprise traction
Last Round
Series B — $839M (Nov 2025) · Lead: Honeywell
Founders & Key People
Honeywell Quantum SolutionsCambridge Quantum
Investors
Honeywell · JPMorgan Chase · Mitsui · Amgen · IBM
Products
- H-Series trapped-ion quantum computers
- InQuanto chemistry software
- Quantum Origin cryptography
Competitors
IonQ · PsiQuantum · Rigetti · IBM Quantum · Google Quantum AI
QuantumComputingDecacornHoneywell
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2025-Q4. Refreshed quarterly.