# Startup funding in the United States, August 2026: Thrive Holdings's $2.0B Growth leads 93 rounds > We read 93 equity rounds raised in the United States and announced in August 2026, raising $17B between them: 42% of the rounds we read worldwide that month... Source: https://millionrounds.com/news/monthly/2026-08/united-states (Millionrounds; every figure on the page links to its filing or article) Equity rounds **93** raised in the United States, 92 with an amount Raised **$17B** across those rounds Lead named **84%** of rounds say who led Share of the world **42%** of rounds; 67% of the money ## The biggest rounds - [1 **Thrive Holdings** Growth · led by SoftBank BB Corp, Altimeter **$2.0B**](https://millionrounds.com/company/thrive-holdings) - [2 **Hadrian** Growth · led by Valor Equity Partners, JP Morgan Chase **$1.4B**](https://millionrounds.com/company/hadrian) - [3 **River AI** Series A · led by General Catalyst, AMP PBC **$1.1B**](https://millionrounds.com/company/river-ai) - [4 **Valar Atomics** Series B · led by Sequoia Capital **$1.0B**](https://millionrounds.com/company/valar-atomics) - [5 B **Base Power** Series D · led by Valor Equity Partners, Ribbit Capital **$1.0B**](https://millionrounds.com/company/base-power) - [6 **Castelion** Series C · led by Andreessen Horowitz, JP Morgan Chase **$800M**](https://millionrounds.com/company/castelion) - [7 **Form Energy** Series G · led by T. Rowe Price **$750M**](https://millionrounds.com/company/form-energy) - [8 **Lumilens** Series C · led by Bain Capital Ventures, Spark Capital **$700M**](https://millionrounds.com/company/lumilens) - [9 **Whatnot** Growth · led by Greycroft **$545M**](https://millionrounds.com/company/whatnot) - [10 **Antares** Series C · led by Paradigm, Caffeinated Capital **$470M**](https://millionrounds.com/company/antares) ## Day by day Equity rounds raised in the United States and announced each day of August. The busiest day was 4 August, with 13. 1 August 31 August ## 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-seed](https://millionrounds.com/benchmarks/pre-seed/united-states) *7* **$5.7M** this month **$3.0M** 12 months here [Seed](https://millionrounds.com/benchmarks/seed/united-states) *12* **$17M** this month **$8.5M** 12 months here [Series A](https://millionrounds.com/benchmarks/series-a/united-states) *23* **$35M** this month **$25M** 12 months here [Series B](https://millionrounds.com/benchmarks/series-b/united-states) *19* **$55M** this month **$60M** 12 months here [Series C](https://millionrounds.com/benchmarks/series-c/united-states) *12* **$132M** this month **$100M** 12 months here [Series D](https://millionrounds.com/benchmarks/series-d/united-states) *8* **$160M** this month **$170M** 12 months here [Growth](https://millionrounds.com/benchmarks/growth/united-states) *8* **$223M** this month **$200M** 12 months here ## The most active leads Firms that led two or more of the month's rounds in the United States. - [**General Catalyst** Cityblock Health, River AI, Transfyr *3 led*](https://millionrounds.com/fund/general-catalyst) - [**Bessemer Venture Partners** Flagler Health, Malachyte, Twin1 AI *3 led*](https://millionrounds.com/fund/bessemer-venture-partners) - [**JPMorgan Chase's Strategic Investment Group** Base Power, Castelion, Hadrian *3 led*](https://millionrounds.com/fund/jpmorgan-chase-s-strategic-investment-group) - [**Sequoia Capital** Neros Technologies, Valar Atomics *2 led*](https://millionrounds.com/fund/sequoia-capital) - [**New Enterprise Associates** Horizon3, TwelveLabs *2 led*](https://millionrounds.com/fund/new-enterprise-associates) - [**Valor Equity Partners** Base Power, Hadrian *2 led*](https://millionrounds.com/fund/valor-equity-partners) - [**Harbert Growth Partners** AusperBio Therapeutics, Yardstik *2 led*](https://millionrounds.com/fund/harbert-growth-partners) - [**Seligman Ventures** Lumilens, Velaura AI *2 led*](https://millionrounds.com/fund/seligman-ventures) ## In what - [AI](https://millionrounds.com/news/monthly/2026-08/sector/ai) **52** - [Energy](https://millionrounds.com/news/monthly/2026-08/sector/energy) **13** - [Robotics](https://millionrounds.com/news/monthly/2026-08/sector/robotics) **11** - [Healthcare](https://millionrounds.com/news/monthly/2026-08/sector/healthcare) **11** - [Fintech](https://millionrounds.com/news/monthly/2026-08/sector/fintech) **9** - [Construction](https://millionrounds.com/news/monthly/2026-08/sector/construction) **8** - [Software](https://millionrounds.com/news/monthly/2026-08/sector/software) **8** - [Cloud](https://millionrounds.com/news/monthly/2026-08/sector/cloud) **7** AI was the busiest sector in the United States. ## Against the world - Rounds, the United States **93** - Rounds, worldwide **220** - Raised, the United States **$17B** - Raised, worldwide **$25B** [The whole of August 2026](https://millionrounds.com/news/monthly/2026-08) ## Other countries in August [24 rounds **United Kingdom** *→*](https://millionrounds.com/news/monthly/2026-08/united-kingdom)[12 rounds **Australia** *→*](https://millionrounds.com/news/monthly/2026-08/australia)[9 rounds **Canada** *→*](https://millionrounds.com/news/monthly/2026-08/canada)[8 rounds **India** *→*](https://millionrounds.com/news/monthly/2026-08/india)[8 rounds **Brazil** *→*](https://millionrounds.com/news/monthly/2026-08/brazil)[5 rounds **China** *→*](https://millionrounds.com/news/monthly/2026-08/china) **How this roundup is made** It is written from the rounds we read that month in named articles and filings, counted by the country the company raised in. Only equity rounds with a stage count; debt, grants and public companies' raises do not. Each month the eight countries with the most equity rounds get their own roundup. We read more sources every month, so compare medians, not totals. [How we read rounds](https://millionrounds.com/methodology) · [Report a mistake](https://millionrounds.com/corrections)