UK-founded Quantinuum, majority-owned by Honeywell, has closed a $600 million funding round, valuing the company at $10 billion. New backers include Nvidia’s NVentures and Quanta Computer, joining existing partners JPMorgan, Amgen, and Mitsui.

The raise will fast-track the launch of Helios, a quantum system debuting this year, and fuel development toward fault-tolerant computing. Quantinuum is also collaborating with Nvidia on AI-quantum projects.

The company has established ventures in Qatar, Singapore, and New Mexico, with Qatar’s project tied to a $1 billion national quantum push. Founded in 2014 as Cambridge Quantum, Quantinuum now employs 630 staff worldwide, reflecting rising investor enthusiasm for the field.