A renewed sense of optimism began to take hold in the U.S. VC market during Q3’25, fueled by a pickup in IPO exits, rising valuations across stages, and an exceptionally active investment climate for a wide range of AI-driven solutions.
US sees largest seed round ever amid red hot investment environment for AI
The U.S. remained the epicenter of AI investment in Q3’25, capturing the vast majority of the jurisdiction’s largest deals. AI system and LLM developers dominated the quarter, led by landmark raises from Anthropic ($13 billion) and xAI ($10 billion), along with a $1 billion round by Reflection AI, a fast-rising entrant in the space.
Beyond foundational model players, the broader AI ecosystem also secured substantial late-stage financing. Notable raises included Databricks ($1 billion) and Groq ($750 million), both key players in AI infrastructure, as well as Magic ($550 million), an emerging AI application company. Other major rounds included Perplexity AI ($600 million), which is redefining AI-powered search and Ramp ($514 million), leveraging AI to transform expense management in fintech, and Cognition AI ($500 million), advancing AI-driven coding solutions.
Together, these transactions reinforce the depth and breadth of capital flowing into AI, from infrastructure and core models to applied solutions across verticals — cementing the sector’s position as the defining growth driver of U.S. venture capital.