Oxford Quantum Circuits is private and has not announced an IPO. OQC raised a £260M ($350M) Series C in June 2026; Rigetti (RGTI) is the closest listed superconducting comparable.
Pre-IPO quantum computing company profile · Founded 2017 · Reading, United Kingdom
Company Facts
IPO Status
No IPO announced
Oxford Quantum Circuits (OQC) shares are not available on public exchanges. See below for listed alternatives with similar technology.
Oxford Quantum Circuits is the UK's leading quantum computing company, built on its patented "Coaxmon" architecture — a 3D superconducting qubit design that moves control wiring off the chip plane for cleaner scaling. OQC pioneered quantum-computing-as-a-service inside commercial data centers, co-locating its QPUs with classical compute at Equinix and Cyxtera facilities in London and Tokyo.
In June 2026 OQC announced a £260M ($350M) Series C — the largest private quantum computing round ever raised in Europe — to scale its international footprint and accelerate its roadmap toward commercially useful fault-tolerant quantum computing.
| Round | Amount | Date | Key Investors | Valuation |
|---|---|---|---|---|
| Series C | £260M ($350M) | Jun 2026 | Consortium incl. institutional growth investors | — |
| Series B | $100M | Nov 2023 | SBI Investment (lead), OTIF, Lansdowne Partners, UTEC | — |
| Series A | £38M | Jul 2022 | Lansdowne Partners, UTEC | — |
Rigetti (RGTI) is the listed superconducting gate-model comparable. Arqit (ARQQ) is the UK's listed quantum pure-play (encryption rather than computing).
Related company roadmaps: Official Rigetti quantum roadmap · Official IonQ quantum roadmap
Can you buy OQC stock?
No. Oxford Quantum Circuits is private and has not announced an IPO. Its June 2026 $350M Series C gives it a long private runway. Rigetti (RGTI) is the closest listed comparable.
What was OQC's Series C?
A £260M ($350M) round announced June 3, 2026 — the largest private quantum computing raise in European history — funding international data-center deployments and its fault-tolerance roadmap.
What makes OQC different?
Its Coaxmon 3D qubit architecture and its data-center-native model: OQC installs QPUs inside commercial colocation facilities (Equinix) next to customers' classical infrastructure, rather than only offering remote cloud access.
More pre-IPO quantum companies
Static profile, updated manually · Last updated 2026-07-31 · Sources: OQC £260M Series C announcement ↗