The Week’s 10 Biggest Funding Rounds: Large Rounds For AI Infrastructure, Space Tech And Investment Management Lead
Executive Take
AI infrastructure and tooling still pull the biggest checks, even as round sizes cool from last week's billion-dollar deals. Watch Temporal's $12.55B valuation and Profound's AI-search-marketing bet as signals of where enterprise AI spend is heading next.
Executive Summary
Crunchbase's weekly top 10 US funding rounds (Sept 12-18, 2026): Temporal Technologies led with $550M for AI infrastructure at a $12.55B valuation, followed by Impulse Space's $308M space vehicle round. Other large rounds went to Ridgeline, Cornelis Networks, Factory, Profound, Arcee AI, Nex, Mazama Energy and Sling Therapeutics, mostly AI-focused.
Why It Matters
AI and technology leaders should note that AI infrastructure, networking and dev-tool startups keep absorbing the largest capital, shaping which vendors and platforms gain scale fastest. GCC and enterprise leaders evaluating AI partners can use this as a signal of market consolidation.