Monthly roundup · United States · October 2026

Startup funding in the United States, October 2026: Lambda's $4.0B Growth leads 281 rounds

By Millionrounds ResearchPublished 1 November 2026Updated 3 November 2026

We read 281 equity rounds raised in the United States and announced in October 2026, raising $27B between them: 38% of the rounds we read worldwide that month and 45% of the money. The largest was Lambda's $4.0B Growth, led by Coatue and Clarus Ventures. The median seed round was $6.5M, against $8.5M over the last twelve months in the United States; at Series A it was $20M. General Catalyst led the most rounds, with 7.

Equity rounds281raised in the United States, 267 with an amount
Raised$27Bacross those rounds
Lead named87%of rounds say who led
Share of the world38%of rounds; 45% of the money

The biggest rounds

  1. 1LambdaGrowth · led by Coatue, Clarus Ventures$4.0B
  2. 2Re:BuildGrowth · led by General Catalyst, JP Morgan Chase$2.1B
  3. 3RampGrowth · led by Thrive Capital, Dragoneer Investment$1.9B
  4. 4TenstorrentSeries E · led by InnovationX, Trace Capital$1.5B
  5. 5KalshiSeries G · led by Sequoia Capital, Wellington Management$1.0B
  6. 6Flapping AirplanesSeries A · led by Index Ventures, Lux Capital$1.0B
  7. 7TypeSafe AISeries A · led by Andreessen Horowitz$870M
  8. 8MModal Labs Inc.Series D · led by Accel$750M
  9. 9Bedrock RoboticsSeries C · led by Emergence Capital, CapitalG$600M
  10. 10OratomicSeries B · led by General Catalyst, Khosla Ventures$475M

Day by day

Equity rounds raised in the United States and announced each day of October. The busiest day was 20 October, with 28.

1 October31 October

By stage, against the year

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

Pre-seed22$3.0Mthis month$3.0M12 months here
Seed92$6.5Mthis month$8.5M12 months here
Series A74$20Mthis month$25M12 months here
Series B28$54Mthis month$60M12 months here
Series C14$100Mthis month$100M12 months here
Series D15$169Mthis month$170M12 months here
Growth29$40Mthis month$200M12 months here

The most active leads

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

In what

AI was the busiest sector in the United States.

Against the world

  • Rounds, the United States281
  • Rounds, worldwide733
  • Raised, the United States$27B
  • Raised, worldwide$59B

The whole of October 2026

Other countries in October

74 roundsIndia→ 56 roundsUnited Kingdom→ 31 roundsChina→ 25 roundsJapan→ 24 roundsSouth Korea→ 18 roundsCanada→ 17 roundsFrance→