Quantum computing start-up Quantum Motion has raised $160 million in Series C funding to enable it to commercialise its silicon transistor-based approach to scalable and energy-efficient quantum systems.
The London-based company said the Series-C funding round was co-led by deep tech venture funds DCVC and Kembara, with participation from British Business Bank and Firgun alongside existing investors.
Quantum Motion said it is developing quantum computers based on silicon transistor technology that is widely used in smartphones and laptops. The company claims this approach can deliver systems with a 100-fold reduction in cost and physical space requirements and a 1,000-fold reduction in energy consumption compared with alternative quantum computing architectures.
The company said its systems are designed to operate inside existing data centre racks, avoiding the need for bespoke facilities and the heavy power demands associated with some competing quantum technologies.
The funding round follows a period of expansion for Quantum Motion. Since its previous raise in 2023, the firm has opened offices and laboratories in Spain and Australia.
In 2025, Quantum Motion delivered what it describes as the world’s first commercial deployment of a full-stack silicon CMOS quantum computer at the UK’s National Quantum Computing Centre. The company has also advanced to Stage B of the DARPA Quantum Benchmarking Initiative.
“Quantum computing will only achieve its full potential if it can be built on a platform that scales, and we believe silicon is the strongest route to achieving that,” said Dr James Palles-Dimmock, chief executive at Quantum Motion. “We are pleased to be joined by investors who share our vision and understand what it takes to build a foundational company in this field.”
