Quantum Motion announced the second close of its Series C funding round, adding Imec.ventures, Lansdowne Partners, Sony Innovation Fund, S3 Ventures, and Inkef to its list of investors.

The company said it had secured “additional investment,” but did not disclose an updated funding figure. In May, following an initial Series C close, Quantum Motion said it had raised $160 million, with the round led by DCVC and Kembara.

In a statement, Quantum Motion said the funding would help support the co-development of custom silicon and allow the company to “leverage global semiconductor manufacturing pipelines and build upon key milestones, including international expansion,” such as opening a US lab in Maryland and participating in stage B of the US Defense Advanced Research Projects Agency’s (DARPA) Quantum Benchmarking Initiative (QBI).

“Silicon technology transformed classical computing, and it remains the only platform capable of delivering the density and scale required for practical quantum utility,” said James Palles-Dimmock, CEO of Quantum Motion. “This commitment from major strategic and financial investors validates our engineering-first strategy and will accelerate our progress towards a utility-scale quantum computer. By tapping into existing global semiconductor supply chains, we are bypassing the cost bottlenecks of bespoke manufacturing and bringing commercially viable quantum systems to market faster.”

Quantum Motion was founded in 2017 by Professor John Morton and Professor Simon Benjamin with the aim of developing quantum computers using traditional CMOS chips. Spun out from University College London and Oxford University, where the two professors worked, the company previously raised $50.8m in 2023.

In September 2026, the company delivered a full-stack quantum computer to the National Quantum Computing Centre (NQCC) in Harwell, UK.