The Week’s 10 Biggest Funding Rounds: Agentic AI And Infrastructure Are Still On A Roll

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This is a weekly feature that runs down the week’s Top 10 announced funding rounds in the U.S. Check out last week’s biggest funding deal roundup here. It was another big week for AI-related startup financings. Mirendil, a developer of agentic AI for R&D, led the pack with a $1 billion series A, followed by Mercor, which secured $750 million to connect AI developers with human experts. Overall, the vast majority of this week’s largest rounds were AI-related, though we did see some biotech, fintech and enterprise software in the mix. 1. Mirendil, $1B, AI for R&D: Mirendil, a developer of agentic AI technology for research and development, secured $1 billion in a Series A funding. Kleiner Perkins and Clearlake Capital led the round for the San Francisco-based startup. 2. Mercor, $750M, human-led AI training: Mercor, a platform that connects AI developers with human experts for model training and evaluation, raised $750 million in Series D funding. The round, backed by a long list of venture investors, set a $20 billion valuation for the San Francisco-based company, which was founded less than four years ago. 3. Torus, $500M, AI infrastructure: Salt Lake City-based Torus, a manufacturer of distributed power and compute infrastructure, announced a $500 million growth financing led by Magnetar Capital. It also introduced a product called Foundry, described as modular AI infrastructure for inference compute. 4.