Axiom Solutions International Raises $2 Billion in the U.S.

During the studied week, the most significant funding rounds raised by American startups focus on AI and energy. Axiom Solutions International stands out with $2 billion, while TypeSafe AI, Oratomic, SignSplit, Arena, and Voltus announce nine-figure rounds. The amounts, valuations, and leading investors outline a landscape dominated by infrastructure, models, evaluation, and energy management.

Scope: US companies, October 3 to 9, 2026

The ranking covers the largest rounds announced by companies based in the United States between October 3 and 9, 2026. The Crunchbase database records most of these operations, with a slight risk of delay as some rounds may be reported late in the week.

Energy and Infrastructure: a $2 Billion Ticket and Three Major Rounds

Axiom Solutions International, a cloud and energy infrastructure spin-off from Flex based in Austin, has secured $2 billion. General Catalyst and Koch Equity have acquired shares in Axiom from Flex based on an initial enterprise value of $37.5 billion. Flex plans to spin off Axiom as an independent publicly traded company early next year, and the new entity hopes to leverage the development of AI. In energy distribution, Voltus raised $225 million in Series D for its distributed energy platform aimed at enhancing grid flexibility, a round led by Generation Investment Management, Activate Capital, and Vitol. In the merger space, Type One Energy, based in Knoxville, secured $200 million in Series B, led by Breakthrough Energy Ventures and Clutterbuck Capital.

Models, Evaluation, and Data: Three Rounds Between $200 Million and $870 Million

TypeSafe AI, developer of the recently launched Jev model, raised $870 million. Andreessen Horowitz was the lead investor, with Sequoia Capital participating, resulting in a valuation of $7.5 billion for the San Francisco-based company. Arena, specializing in AI model evaluation, announced a $200 million Series B led by Lightspeed Venture Partners and Khosla Ventures, with a valuation of $3.1 billion; the company claims to have surpassed $100 million in annual revenue. On the protection and circulation of human contributions, SignSplit emerged with $400 million in seed funding backed by W Group, valuing the New York-based company at $1 billion; the company was founded in 2024.

Advanced Computing and Industry: From Quantum to Microfactories

Oratomic, headquartered in Pasadena and specializing in the development of fault-tolerant quantum computers, secured $475 million in funding from Arch Venture Partners, Spark Capital, Khosla Ventures, Index Ventures, General Catalyst, and Bezos Expeditions; the company had already raised $300 million in July. Vinci, based in Palo Alto and offering an AI computing platform for hardware engineers, completed a $250 million Series B round, valuing the company at $1.5 billion, with Advent, Temasek, and Xora as lead investors. Atomic Machines, located in Emeryville, claims to have raised $250 million to date and is working on AI-native digital manufacturing systems to produce micro-machines directly from code.

AI-Powered Insurance and General Trends

Ledgebrook, an AI-powered insurance platform based in Boston, raised $200 million in equity, a round co-led by Allianz X and Rockefeller Capital Management; its total funding amounts to approximately $315 million, according to Crunchbase. More broadly, the major rounds cover multiple niches, from infrastructure to applications, and are dominated this week by AI and energy.