Overview

• The UK–US quantum firm closed a $600 million round that pegs its valuation at $10 billion, up from $5 billion in early 2024.
• Nvidia’s venture arm made its first investment in Quantinuum, joining new backers such as Quanta Computer alongside returning investors including JPMorgan, Amgen, Mitsui and Honeywell.
• Honeywell remains the majority shareholder with roughly a 54% stake, and it also participated in the latest financing.
• Executives said the funding will accelerate product development and ecosystem partnerships, including work toward the next‑generation Helios system and collaboration through Nvidia’s Accelerated Quantum Research Center in Boston.
• Quantinuum combines trapped‑ion hardware with software used by government and enterprise clients, a push investors view as progress even as commercial timelines and security risks from future quantum capabilities remain under debate.