Equity capital raise · Hardware
Quantinuum raises approximately $600 million in equity
The September 2025 financing backed the development of its next quantum computing systems.
Honeywell announced an approximately $600 million equity financing for Quantinuum on September 4, 2025, at a $10 billion valuation before the investment. New investors included Quanta Computer, NVentures, QED Investors, MESH and Korea Investment Partners.
Existing shareholders JPMorgan Chase, Mitsui & Co, Amgen, Cambridge Quantum Holdings, Serendipity Capital and Honeywell also reinvested. Quantinuum planned to use the capital to advance quantum computing at scale, including the then-upcoming Helios system and work toward universal fault-tolerant computing.
Funding history
Equity capital raise · This round~$600M