Top AI startups secure major funding rounds in october 2026

In October 2026, the U.S. startup ecosystem saw significant investment in AI-related ventures, with ten major funding rounds totaling over $6 billion. Tenstorrent, a developer of AI processors, raised $1.5 billion in Series E funding, led by Trace Capital and Innovation X, setting a $6.2 billion valuation. Flapping Airplanes, an AI lab focused on cost-effective models, secured $1 billion in Series A, less than 10 months after its $180 million seed round. ASI, a critical infrastructure AI firm, raised $325 million, while Xona, a space tech startup, closed a $250 million round. Pathos AI, applying AI to drug development, raised $237 million, and Warp Sciences, combining AI and robotics in life sciences, secured $215 million. Notable also were Whop, Star Therapeutics, and Warhound, each raising $200 million. Arda Industries, an AI manufacturing software developer, raised $160 million. These rounds highlight the diverse applications of AI across industries, from military dogs to critical infrastructure security. The funding rounds were tracked from Oct. 17-23, 2026, with some delays in reporting. Warhound, co-founded by Palmer Luckey, plans to equip military dogs with Anduril technology. Star Therapeutics’ $200 million round followed Incyte’s acquisition of its subsidiary, Vega Therapeutics, for up to $2 billion. The Crunchbase Megadeals Board provides a curated list of these deals, reflecting the current state of venture capital activity in the U.S. market.