Quantum Motion Adds New Investors in Series C Second Close
Quantum Motion has announced the second close of its Series C funding round, securing additional investment from Imec.ventures, Lansdowne Partners, Sony Innovation Fund, S3 Ventures, and Inkef. The round is led by DCVC and Kembara, with the company stating the funds will support the scaling of its silicon spin-based quantum hardware.
Funding Allocation and Company Vision
Indeed, the London-based company designs qubits using silicon spins, leveraging standard CMOS chip fabrication, which is the same process in use for everyday processors. This approach forms the core of its investor pitch. Quantum Motion claims this method can reduce per-machine costs from over $100 million (for some rival architectures) to single-digit millions at volume, alongside purported 100-fold space and 1,000-fold energy reductions. These figures are provided by Quantum Motion and its investors, and they represent targets for future products.
The new capital will be directed towards custom silicon co-development, forging partnerships in semiconductor manufacturing, and international expansion, including the establishment of a new lab in Maryland. The company also highlights its participation in Stage B of DARPA’s Quantum Benchmarking Initiative.
Quantum Motion aims to develop “fault-tolerant” and “utility-scale” quantum hardware. Currently, no such machine exists from Quantum Motion or any other entity. The press release doesn’t disclose current qubit counts, gate fidelities, or error rates, and such metrics are crucial for assessing the hardware’s proximity to useful computation. Without these details, the funding news primarily indicates investor confidence.
Investor Perspectives
A significant portion of the press release features promotional quotes from investors, employing terms such as “disruptive,” “contrarian vision,” and “the future of quantum.” These comments reflect the perspectives of stakeholders with equity in the company, aiming to see its valuation increase.
Meanwhile, Quantum Motion CEO James Palles-Dimmock emphasizes the strategic alignment with the existing manufacturing base:
“Silicon technology transformed classical computing and it remains the only platform capable of delivering the density and scale required for practical quantum utility.”
Silicon spin is one of several competing qubit technologies, alongside superconducting, trapped-ion, and photonic systems, none of which have yet achieved fault tolerance. Quantum Motion points to a full-stack silicon CMOS system deployed at the UK’s National Quantum Computing Centre as evidence of its execution. While this deployment is a real achievement, the long-term viability of the CMOS cost argument at scale remains unproven, and this funding round doesn’t provide a definitive answer.