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Temporal Technologies’ $550 million funding round topped the list of the largest U.S. startup rounds between September 12 and 18, 2026, followed by Impulse Space’s $308 million funding. The list included companies in AI infrastructure, space, networking, energy, and biotechnology.
Crusoe raised $3.9 billion in Series F funding, lifting its valuation to $30.9 billion, to finance large data centers and portable modular computing centers. This comes as the company expands its infrastructure and GPU rental and inference services.