Axiom Solutions International, a cloud and power infrastructure spinout from Flex, secured $2 billion in funding. General Catalyst and Koch Equity led the investment, valuing the Austin-based company at $37.5 billion. Flex intends to spin off Axiom into an independent public entity by early next year.
TypeSafe AI, the developer of the Jev model, raised $870 million in a round led by Andreessen Horowitz with participation from Sequoia Capital. The San Francisco-based startup reached a valuation of $7.5 billion. Meanwhile, quantum computing firm Oratomic raised $475 million, following a previous $300 million round in July.
Data protection startup SignSplit emerged from stealth with $400 million in seed funding, achieving a $1 billion valuation. Additionally, Vinci, an AI platform for hardware engineering, secured $250 million in Series B funding at a $1.5 billion valuation. Atomic Machines also announced it has raised $250 million to date.
Voltus, an energy distribution platform, closed a $225 million Series D round. Fusion technology developer Type One Energy and AI-powered insurance platform Ledgebrook each secured $200 million. Ledgebrook's total funding has now reached approximately $315 million.
Arena, an AI model evaluation platform, raised $200 million in Series B funding, reaching a valuation of $3.1 billion. The company reported an annual revenue run rate exceeding $100 million. These deals represent the largest funding rounds for U.S.-based companies tracked between October 3 and October 9, 2026.
