Monthly roundup · United Kingdom · June 2026

Startup funding in the United Kingdom, June 2026: Oxford Quantum Circuits's $350M Series C leads 31 rounds

By Millionrounds ResearchPublished 1 July 2026Updated 1 November 2026

We read 31 equity rounds raised in the United Kingdom and announced in June 2026, raising $1.2B between them: 13% of the rounds we read worldwide that month and 3% of the money. The largest was Oxford Quantum Circuits's $350M Series C, led by Bullhound Capital. The median seed round was $2.4M, against $3.2M over the last twelve months in the United Kingdom; at Series A it was $13M. Index Ventures led the most rounds, with 2.

Equity rounds31raised in the United Kingdom, 31 with an amount
Raised$1.2Bacross those rounds
Lead named58%of rounds say who led
Share of the world13%of rounds; 3% of the money

The biggest rounds

  1. 1Oxford Quantum CircuitsSeries C · led by Bullhound Capital$350M
  2. 2PhysicsXSeries C · led by Temasek Holdings$300M
  3. 3RRQ BioSeries A · led by Frazier Life Sciences$115M
  4. 4WWordsmithSeries B · led by Index Ventures, Highland Europe$70M
  5. 5BBibliUGrowth$55M
  6. 6IMU BiosciencesSeries A · led by IQ Capital, Molten Ventures$53M
  7. 7InherentSeed · led by Index Ventures, Radical Ventures$50M
  8. 8SSembleSeries C · led by Partech Ventures, Revaia$40M
  9. 9GigatonSeries A · led by Plural$26M
  10. 10AAirspeedSeries A · led by DN Capital$20M

Day by day

Equity rounds raised in the United Kingdom and announced each day of June. The busiest day was 3 June, with 4.

1 June30 June

By stage, against the year

Each stage's median this month beside its twelve-month median: the United Kingdom's own where we hold enough rounds for a benchmark, otherwise the worldwide one.

Pre-seed2$3.5Mthis month$1.8M12 months here
Seed10$2.4Mthis month$3.2M12 months here
Series A12$13Mthis month$13M12 months here
Series B2$43Mthis month$42M12 months here
Series C4$170Mthis month$100M12 months, worldwide
Growth1$55Mthis month$24M12 months here

The most active leads

Firms that led two or more of the month's rounds in the United Kingdom.

In what

AI was the busiest sector in the United Kingdom.

Against the world

  • Rounds, the United Kingdom31
  • Rounds, worldwide245
  • Raised, the United Kingdom$1.2B
  • Raised, worldwide$35B

The whole of June 2026

Other countries in June

106 roundsUnited States→ 9 roundsAustralia→ 8 roundsIndia→ 8 roundsGermany→ 7 roundsNetherlands→ 6 roundsFrance→ 6 roundsSpain→