When Cathie Wood places a bet, she doesn't exactly hedge. Her ARK Venture Fund has now anchored nearly one-fifth of its entire portfolio on a single merged entity: Elon Musk's freshly combined SpaceX-xAI colossus.

The Biggest Deal in Two Decades

The ARK Venture Fund (ARKVX) confirmed that SpaceX and xAI have officially merged in what Musk called a "transformative deal" valued at $1.25 trillion. SpaceX absorbed xAI to unify Musk's parallel missions in aerospace and artificial intelligence, with SpaceX valued at approximately $1 trillion and xAI at roughly $250 billion.

This transaction obliterated a twenty-year record for global mergers and acquisitions, previously held by Vodafone's $203 billion takeover of Mannesmann back in 2000. Musk, never one for understatement, framed the synergy as far more than incremental progress, saying it marks "not just the next chapter, but the next book" in his shared mission. On X, he celebrated simply: "To the stars! SpaceX & xAI are now one company."

What It Means for ARK's Portfolio

Before the merger, ARK Venture Fund held SpaceX at 11.23% and xAI Holdings Corp. at 6.31% as of January 31. Combined, this new "Muskonomy" powerhouse now commands a massive 17.54% of the fund—making it the dominant single position by a wide margin.

To put that in perspective, the next largest holdings are Figure AI at 4.24% and Databricks at 3.55%. Here's how the top five currently stack up:

IPO Speculation and Regulatory Questions

The timing is notable. SpaceX is reportedly preparing for a potential public offering later this year that could see its valuation climb past $1.5 trillion. For ARK investors, that would mean even more visibility into what's already their highest-conviction play.

But the deal also tightens Musk's sprawling empire, which already includes Tesla Inc. (TSLA), Neuralink, and X. That interconnected web is expected to attract regulatory scrutiny, particularly around governance structures and SpaceX's extensive portfolio of federal contracts.

For now, ARK has effectively doubled down on Musk's vision—consolidating high-conviction exposure into a single, dominant leader spanning AI and aerospace.