General Catalyst Leads a Busy October for U.S. Startup Dealmaking

October was an active month for U.S. startup funding, with well-known venture investors showing continued appetite for large deals. General Catalyst ranked as the busiest lead dealmaker by both round count and size, leading at least nine known rounds. Lightspeed Venture Partners followed with eight lead rounds, while Sequoia Capital and Andreessen Horowitz each had seven.

The broader lead-investor view covered the 16 most active lead or co-lead investors with three or more known October deals.

General Catalyst also led the ranking of investors backing the highest aggregate round value, with lead or co-lead rounds collectively valued at $5.1 billion. The largest contributors were a $2.1 billion round for Re:Build and a $2 billion Series A for Axiom Solutions International, a cloud and power infrastructure spinout of Flex.

J.P. Morgan Asset Management, which co-led the Re:Build financing, ranked next by this measure. Koch Equity, co-lead of the Axiom deal, also ranked high, followed by the five co-lead investors in Ramp’s $1.9 billion Series G.

When measured by total participation in qualifying rounds rather than lead roles, Y Combinator ranked as the busiest investor in deals of $5 million or more. Crunchbase News notes that the accelerator commonly appears as a nonlead backer in follow-on rounds for startups that participated in its program.

Andreessen Horowitz followed with participation in at least 22 qualifying rounds, and General Catalyst ranked next with 17. The ranking covered investors that participated in five or more rounds of $5 million or more.

The investor rankings point to an upbeat U.S. startup funding environment in October. While the month did not include rounds comparable to earlier record-setting megafinancings for OpenAI and Anthropic, large checks were still being written across multiple categories.

For founders and market watchers, the practical signal is clear: top-tier venture firms remained active, especially in sizeable U.S. rounds and across categories including artificial intelligence, cloud computing, manufacturing, startups and venture.