Monthly roundup · AI · June 2026

AI startup funding, June 2026: Prometheus's $12B Series B leads 124 rounds

By Millionrounds ResearchPublished 1 July 2026Updated 5 November 2026

We read 124 equity rounds in AI announced in June 2026, raising $24B between them: 51% of all the rounds we read that month and 68% of the money. The largest was Prometheus's $12B Series B. The median seed round was $6.5M, against $7.0M over the last twelve months in AI; at Series A it was $27M. Andreessen Horowitz led the most rounds, with 5.

Equity rounds124in AI, 118 with an amount
Raised$24Bacross those rounds
Lead named83%of rounds say who led
Share of the month51%of rounds; 68% of the money

The biggest rounds

  1. 1PrometheusSeries B · United States$12B
  2. 2BasetenGrowth · United States · led by Spark Capital, Wellington Management$1.5B
  3. 3Neura RoboticsSeries C · Germany$1.4B
  4. 4CCyeraGrowth · United States · led by Temasek Holdings, Evolution Equity Partners$600M
  5. 5SupabaseSeries F · United States · led by GIC$500M
  6. 6FFlourishGrowth · United States · led by Google Ventures, Lux Capital$500M
  7. 7GGeneralist AISeries B · United States · led by Radical Ventures$400M
  8. 8SunoSeries D · United States · led by Bond$400M
  9. 9Nearfield InstrumentsSeries D · Netherlands · led by Fidelity$380M
  10. 10Modal LabsGrowth · United States · led by General Catalyst, Redpoint$355M

Day by day

Equity rounds in AI announced each day of June. The busiest day was 4 June, with 11.

1 June30 June

By stage, against the year

Each stage's median this month beside its twelve-month median: the sector's own where we hold enough rounds for a benchmark, otherwise the one across all sectors.

Pre-seed10$3.0Mthis month$2.1M12 months here
Seed37$6.5Mthis month$7.0M12 months here
Series A34$27Mthis month$21M12 months here
Series B15$63Mthis month$55M12 months here
Series C12$115Mthis month$110M12 months here
Series D3$380Mthis month$147M12 months here
Growth11$200Mthis month$150M12 months here

The most active leads

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

Where

United States had the most AI rounds this month.

Against the month

  • Rounds, AI124
  • Rounds, all sectors245
  • Raised, AI$24B
  • Raised, all sectors$35B

The whole of June 2026

Other sectors in June

39 roundsFintech→37 roundsHealthcare→24 roundsBig Data & Analytics→23 roundsBiotech→20 roundsRobotics→20 roundsEnterprise Software→16 roundsEnergy→16 roundsConstruction→15 roundsSoftware→12 roundsFinancial Services→11 roundsHardware & Electronics→11 roundsDefence Tech→11 roundsAerospace & Space→11 roundsMedical Devices→11 roundsLogistics→10 roundsManufacturing→