Re:Build Lands $2.1 Billion; Kalshi valued at $40 Billion

Manufacturing startup Re:Build closed $2.1 billion in new funding this week, the largest of ten U.S. venture rounds topping $100 million between Oct. 24 and 30, 2026. General Catalyst and JPMorganChase led the financing for the six-year-old company, based in Framingham, Massachusetts. Re:Build partners with industrial companies and innovators from product design through large-scale production.

Predictions marketplace Kalshi took second place with a $1 billion Series G. Wellington Management and Sequoia Capital led the round, which set a $40 billion post-money valuation for the New York company. Kalshi says its annualized trading volume now exceeds $1 trillion — a figure that explains why investors are pricing it like a financial exchange rather than a betting app.

Which sectors drew the biggest checks?

The week's money spread across manufacturing, construction automation, biotech, batteries, defense and enterprise AI. Construction robotics stood out.

Bedrock Robotics, a San Francisco developer of autonomous systems for heavy construction equipment, raised $600 million in Series C funding led by CapitalG and Emergence Capital. The round values Bedrock at $4.1 billion post-money and lifts its total funding to nearly $1 billion.

Biotech followed. Dren Bio, based in San Carlos, California, closed $350 million in a round led by Juvia Group and Lightspeed Venture Partners. The company develops antibody therapeutics for cancer and autoimmune diseases. The new capital will support advanced trials of its blood cancer therapies.

How did the smaller rounds break down?

Five more deals filled out the top ten, three of them tied at $100 million.

• Group 14 Technologies, $169 million, battery tech. The Woodinville, Washington maker of advanced silicon battery materials raised a Series D extension and announced plans to expand into Europe with a production facility in Sagunto, Spain.
• Firehawk Aerospace, $150 million, defense tech. The seven-year-old Dallas propulsion developer said it secured over $150 million in Series D funding at a valuation above $1.4 billion. Advent and Rochefort led the deal.
• Serval, $150 million, enterprise AI. The two-year-old San Francisco startup builds coding agents for enterprise automation. Sequoia Capital led its Series C at a $3 billion valuation.
• General Compute, $100 million, AI infrastructure. Blackbird and Abstract led the Series A for the AI cloud provider, which is building out capacity using inference chips from Nvidia rivals Cerebras Systems, SambaNova and Positron AI.
• Foundry Robotics, $100 million, autonomous factories. Marlinspike led the Series A for the Emeryville, California company, which builds and operates autonomous factories.
• Hex Technologies, $100 million, data analytics. Peak XV and 137 Ventures led the round, which valued the San Francisco maker of an AI-native data analytics platform at $1.2 billion.

What does the lineup signal?

Read together, the ten deals show investors paying premium prices for companies that move atoms, not just software. Re:Build, Bedrock Robotics, Foundry Robotics, Group 14 and Firehawk Aerospace all make physical products — five of the ten rounds, and more than $3 billion of the roughly $4.7 billion raised.

The General Compute round points in a different direction. Its bet on Cerebras, SambaNova and Positron AI inference chips, rather than Nvidia hardware, reflects a broader push by cloud upstarts to cut dependence on the dominant supplier.

Sequoia Capital appears twice on the list, as lead or co-lead on both the Kalshi and Serval rounds, extending its exposure to prediction markets and enterprise AI agents. With Kalshi commanding a $40 billion valuation on trillion-dollar trading volume, and robotics startups raising $700 million between them, the pattern for late 2026 is clear: capital is chasing companies that automate the physical economy as aggressively as it once chased pure software plays.