Key Points
- IonQ agreed to acquire Oxford Ionics for $1.075 billion in June 2025, completing in September 2025.
- The University of Oxford's Department of Physics described it as the highest-value acquisition of any Oxford quantum computing spinout to date.
- Rigetti Computing announced in March 2026 its intention to invest up to $100 million in the UK — its first major investment outside the United States.
Two deals in the past twelve months illustrate why Oxfordshire is treated as a genuine centre of gravity in global quantum computing: the largest acquisition of a University of Oxford quantum spinout to date, and a fresh nine-figure US investment into the county.
Oxford Ionics: a $1.075 billion exit to IonQ
Oxford Ionics, founded in 2019 by University of Oxford physicists Dr Chris Ballance and Dr Tom Harty, engineered trapped-ion qubits that can be manufactured on standard semiconductor chips, and held world records for qubit fidelity.
In June 2025, Nasdaq-listed IonQ announced a definitive agreement to acquire Oxford Ionics for $1.075 billion — approximately $1.065 billion in IonQ stock and $10 million in cash. The deal completed in September 2025; the University of Oxford's own Department of Physics described it as the highest-value acquisition of any Oxford quantum computing spinout to date, and both founders remained with the combined company.
Rigetti Computing: a $100 million first move outside the US
In March 2026, Nasdaq-listed Rigetti Computing announced its intention to invest up to $100 million in the UK — its first major investment outside the United States.
The move builds on Rigetti's existing Abingdon presence and its 36-qubit system already deployed at the National Quantum Computing Centre at Harwell, and is aimed at deploying a UK-based system of over 1,000 qubits within three to four years, which the company tied explicitly to the UK Government's national quantum computing programme.
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UK Inward Investment Guides: Oxfordshire
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