xAI raises $20B Series E to scale Grok and build world’s largest AI infrastructure

• xAI raised $20 billion in an oversubscribed Series E, exceeding its $15B target and securing backing from Valor, Fidelity, Qatar Investment Authority, NVIDIA, and Cisco.
• The funding will accelerate buildout of Colossus I & II supercomputers, already powering over one million H100 GPU equivalents.

xAI, the artificial intelligence company founded by Elon Musk, announced today it has raised $20 billion in a Series E funding round, exceeding its $15 billion target.

The oversubscribed round drew participation from Valor Equity Partners, Stepstone Group, Fidelity, Qatar Investment Authority, MGX, and Baron Capital Group. Strategic investors NVIDIA and Cisco Investments also joined to support infrastructure expansion.

The funding will accelerate development of Colossus I and II, xAIs high-performance supercomputers now running over one million H100 GPU equivalents, making them among the most powerful AI clusters in the world.

xAI said it will use the capital to advance the Grok platform, including the upcoming Grok 5 model, and expand AI products across consumer and enterprise markets.

The companys AI ecosystem includes Grok Voice, a multilingual voice agent deployed across Tesla vehicles; Grok Imagine, a multimodal image and video generation suite; and Grok on X, a platform-integrated assistant trained on real-time global events.

xAI reports over 600 million monthly active users across the X and Grok platforms.

The company framed the raise as essential to scaling its core mission: “Understanding the Universe.” With Grok 5 in training and new applications in development, xAI plans to expand its reach to billions of users.