17 US-Based AI Companies That Raised $100M+ in Early 2026

17 U.S.-based AI startups raised mega-rounds of $100M+ within first ~6 weeks of 2026. U.S. AI startups raised more than $76B through mega-rounds in 2025.

February 2026:

• ElevenLabs $500M Series D at $11B (Sequoia) — voice AI
• Anthropic $30B Series G at $380B (Founders Fund, Coatue, Nvidia)
• Runway $315M Series E at $5.3B (General Atlantic) — AI video
• Fundamental $255M Series A at $1.4B (Oak HC/FT, Salesforce Ventures) — big data
• Goodfire $150M Series B at $1.25B (B Capital) — AI research lab
• Simile $100M Series A (Index Ventures) — AI mimicking human decisions

January 2026:

• SkildAI $1.4B Series C at $14B (SoftBank, Nvidia) — robotics models
• xAI $20B Series E (Valor, Fidelity, Qatar) — acquired by SpaceX Feb 2
• humans& $480M seed at $4.48B (Nvidia, Jeff Bezos, GV)
• Baseten $300M Series E at $5B (IVP, CapitalG) — AI infra
• Decagon $250M Series D at $4.5B (Coatue, Index) — conversational AI
• OpenEvidence $250M Series D at $12B (Thrive, DST) — medical AI
• Inferact $150M seed at $800M (a16z, Lightspeed) — vLLM commercialization
• PaleBlueDot AI $150M Series B at $1B — AI compute platform
• Arena $150M Series A at $1.7B (Felicis, UC) — LLM evaluation
• Flapping Airplanes $180M seed at $1.5B (GV, Sequoia, Index) — AI lab
• Deepgram $130M Series C at $1.3B (AVP) — voice AI, acquired YC startup

Notable trends: massive seed rounds, Nvidia/Sequoia/Index consistent leads, rapid M&A (xAI acquired by SpaceX weeks after raise).