Mirendil's $1B Series A Heads a $3.5B Week for AI Startups

Mirendil, a San Francisco startup building agentic AI for research and development, closed a $1 billion Series A — the largest of ten U.S. funding rounds of $100 million or more announced Nov. 7-13, 2026, according to Crunchbase. Kleiner Perkins and Clearlake Capital led the round, topping a week in which the vast majority of the biggest financings were AI-related, with biotech, fintech and enterprise software filling out the rest of the list.

Mercor followed at No. 2, raising $750 million in Series D funding. The San Francisco company, founded less than four years ago, connects AI developers with human experts for model training and evaluation. The round, backed by a long list of venture investors, set a $20 billion valuation — the largest valuation on this week's board.

Where did the rest of the money go?

Torus, a Salt Lake City manufacturer of distributed power and compute infrastructure, announced $500 million in growth financing led by Magnetar Capital. Alongside the raise, it introduced Foundry, a product it describes as modular AI infrastructure for inference compute.

Two companies tied at $300 million. Path Robotics, a Columbus, Ohio developer of physical AI for robotics and manufacturing with initial expertise in welding, picked up a $300 million Series E led by Georgian at a $2.45 billion valuation. LangChain, whose platform runs, improves and governs AI agents, closed a $300 million Series C at a $3 billion valuation, with CapitalG leading the round for the 4-year-old San Francisco company.

Nominal, an Austin-based developer of intelligence tools for hardware engineering, raised $240 million at a $3 billion valuation. Lightspeed Venture Partners and Insight Partners led the round.

Which non-AI companies made the cut?

Imprint, a payments, loyalty and customer intelligence platform for brands, landed $130 million at a $1.9 billion valuation. Khosla Ventures led the financing for the 6-year-old, New York-based company — the week's largest fintech deal.

Delix Therapeutics carried the biotech flag. The Bedford, Massachusetts startup, which says it has "reverse-engineered and optimized psychedelics" to develop treatments for psychiatric and psychological disorders, closed $100 million in Series C funding. Johnson & Johnson Innovation and SV Health Investors' Dementia Discovery Fund led the financing.

Databento, a financial market data platform, secured $100 million in Series C funding at a $1.1 billion valuation, with Fifth Down Capital leading for the Salt Lake City company.

What do the newest entrants signal?

Mavria, focused on standardizing how AI infrastructure is developed, built and deployed, launched publicly and said it has raised $130 million in pre-seed and seed funding to date. Its latest round, led by Paradigm, sets a $1 billion valuation. The startup's founders formerly worked at the U.S. Department of Energy.

Rox, a San Francisco developer of an AI revenue agent for enterprise sales, announced a $100 million Series B led by General Catalyst and March Capital.

The methodology: Crunchbase tracked the largest announced rounds raised by U.S.-based companies for Nov. 7-13, 2026. Some rounds reported late in the week may lag the database.

Taken together, the ten rounds total more than $3.5 billion, and eight of the ten companies on the board either build AI directly or supply the infrastructure and tooling around it. That split suggests investor appetite for agentic AI and compute infrastructure — the categories that produced the week's two biggest checks — hasn't cooled heading into the final weeks of 2026.