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UK Startups and Innovation
31JUL

OQC raises £260m in Europe's biggest quantum round

3 min read
12:32UTC

Oxford Quantum Circuits closed a £260m Series C on 2 June led by Bullhound Capital, with the British Business Bank co-investing beside a macro hedge fund, an oil major and Spanish and Japanese sovereign funds.

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TechnologyDeveloping
Key takeaway

British quantum now raises growth capital from commercial investors, with the state co-investing rather than underwriting.

Oxford Quantum Circuits (OQC) raised a £260m ($350m) Series C on Tuesday 2 June, the largest private quantum funding round Europe has recorded. Growth investor Bullhound Capital led. The British Business Bank (BBB), the UK's state development bank, joined the cap table as a co-investor, and chief executive Gerald Mullally called the raise a coming-of-age moment for British quantum. 1

A Series C is a company's third major institutional round, the stage at which a firm scales a proven product rather than proving one. Alongside Oxford backers Magdalen College and Oxford Science Enterprises sit macro hedge fund Rokos Capital Management, Spain's state finance arm COFIDES, Chevron Technology Ventures, and Japan's SBI and UTEC. Rokos and Chevron do not write deep-tech research cheques; their presence reads as commercial capital betting on near-term returns.

Britain put £2bn behind quantum in March 2026 through the ProQure procurement programme, the first country to commit at that scale . The BBB had already cornerstoned Quantum Motion's $160m Series C in May , taking the anchor position other investors follow. OQC is the first British quantum company to raise this size from a predominantly commercial group, with the state present yet not carrying the round.

Fault-tolerant systems, machines that correct their own errors well enough to run long computations, need fabrication capacity, and OQC already operates across the UK, United States, Japan and Spain. DSIT has not said whether the £260m funds British plant and jobs or expansion across those overseas sites, the question that decides what the £2bn quantum commitment actually buys at home.

Deep Analysis

In plain English

Quantum computers work differently from ordinary computers. Instead of processing information as 1s and 0s, they use quantum bits (qubits) that can be in multiple states simultaneously, making certain types of calculation far faster. OQC's approach uses a design called the coaxmon, developed at Oxford, which keeps qubits stable by engineering out interference that would otherwise scramble results. The £260m raised this week funds more qubits, better error correction, and the manufacturing capacity to sell access to those systems commercially. Why do investors care? Because industries from drug discovery to supply-chain optimisation to cryptography need calculations that classical computers would take thousands of years to complete. The race is to build a system reliable enough to run those calculations without errors.

Deep Analysis
Root Causes

Three converging forces made this round possible in June 2026 rather than two years earlier.

First, the UK government's £2bn ProQure procurement commitment in March 2026 converted hypothetical future state demand into a contracted revenue pipeline, giving crossover investors (Rokos Capital, Chevron Technology Ventures) a floor on OQC's addressable market.

Second, the British Business Bank's expanded £6.6bn direct-mandate, active from April 2026, put a state co-investor on the cap table without requiring OQC to structure the round as a grant or loan, removing the dilution friction that had historically pushed UK deep-tech founders toward US-dominated syndicates.

Third, OQC already operated commercially in the UK, US, Japan and Spain before this round, meaning the £260m is expansion capital for a revenue-generating business, not pre-revenue research funding.

What could happen next?
  • Opportunity

    UK quantum software companies now have a domestically-accessible hardware provider at commercial scale, reducing dependence on IBM or IonQ cloud access.

    Medium term · Assessed
  • Risk

    If OQC's fabrication investment goes to its existing Spanish or Japanese sites rather than UK facilities, the domestic manufacturing case for the ProQure strategy weakens.

    Short term · Assessed
  • Precedent

    Rokos Capital and Chevron as quantum investors establishes a crossover-capital playbook that other UK quantum companies (Quantum Motion, PsiQuantum UK) can reference when approaching non-specialist investors.

    Medium term · Reported
Sources:Oxford Quantum Circuits
Mentions:British Business Bank →Oxford Science Enterprises →Quantum Motion →DSIT →McKinsey →Boston →Chevron →Japan →Spain →United States →Oxford Quantum Circuits →Bullhound Capital →Magdalen College Oxford →COFIDES →Chevron Technology Ventures →SBI →UTEC →ProQure →
First Reported In

Update #7 · OQC's £260m sets European quantum record

Oxford Quantum Circuits· 7 Jun 2026
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Causes and effects
Caused by
UK commits £2bn to quantum deployment
UK's £2bn ProQure quantum commitment created the policy context that made OQC's £260m commercial round credible to crossover investors.
Occurred 1 Mar 2026
Read story →
BBB puts £40m into quantum hardware
British Business Bank's cornerstone of Quantum Motion's $160m Series C in May established the BBB's direct co-investment pattern repeated in OQC's round.
Occurred 7 May 2026
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UKRI confirms 58% cut to STFC labs
STFC's national-laboratory cuts squeeze facilities upstream of Oxford Quantum Circuits' record £260m round.
Occurred 9 Jul 2026
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This Event
OQC raises £260m in Europe's biggest quantum round
Britain's first quantum raise at this scale from a mostly commercial syndicate, with the state co-investing rather than underwriting the round.
Led to
DSIT scorecard maps the funding barbell
The DSIT scorecard's capital-pace barbell is illustrated by OQC's £260m Series C closing on 2 June, the same week the scorecard measures the 2025 annual baseline.
Occurred 10 Jun 2026
Read story →
AION quantum result lands in Nature
OQC's £260m commercial quantum round and AION's Nature publication represent complementary tracks — revenue-stage hardware and upstream proof-of-technique — in the UK quantum stack.
Occurred 17 Jun 2026
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Humanoid's buyers wrote the $152m cheque
OQC's £260m raise set the last British hardware valuation precedent Humanoid's round now exceeds.
Occurred 21 Jul 2026
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Different Perspectives
Fubon Financial
Fubon Financial
Fubon Financial joined Humanoid's Series A on 21 July as a minority financial investor alongside Schaeffler and Bosch, who also hold the customer and manufacturer roles. A pure-play investor from Taipei is pricing a London robot maker on terms two German industrial groups effectively set.
NATO Innovation Fund
NATO Innovation Fund
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Prime Movers Lab
Prime Movers Lab
Prime Movers Lab led Humanoid's Series A on 21 July as the round's only pure financial investor, sharing the cap table with two co-investors who are also the anchor customer and the factory. That leaves the fund's usual arm's-length pricing role diluted by partners with a direct commercial stake in the valuation holding up.
Bosch and Schaeffler
Bosch and Schaeffler
Schaeffler signed what Humanoid calls the industry's largest publicly announced commercial agreement, while Bosch took equity and became contract manufacturer, filling capacity a shrinking combustion supply chain freed. Neither company has disclosed a unit count or an invoice, so their public commitment stops well short of Forbes' 100,000-unit projection.
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UK founders raising seed through Series A
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EQT
EQT
EQT was reported on 3 July to be in advanced talks for a further CuspAI stake on behalf of the EU's Scaleup Europe Fund, but does not appear on the round CuspAI closed. Whether Europe's own sovereign vehicle secured a position, was outbid, or withdrew is unresolved.