Tesla CEO Elon Musk’s net worth has reportedly crossed $800 billion after his spacecraft firm SpaceX acquired artificial intelligence (AI) firm and social media company xAI, cementing his position as the richest individual in history.
According to Forbes, the SpaceX–xAI transaction values the combined company at $1.25 trillion and added about $84 billion to Musk’s wealth, lifting his net worth to $852 billion.
Ahead of the merger, Elon Musk held a 42% stake in SpaceX, valued at $336 billion and owned 49% of xAI, worth nearly $122 billion following a recent private fundraising round.
Following the merger, SpaceX was valued at $1 trillion and xAI at $250 billion, with Elon Musk owning about 43% of the combined company, valued at roughly $542 billion.
SpaceX now stands as Elon Musk’s most valuable holding, surpassing all other assets and reshaping his overall wealth mix after the xAI merger, based on Forbes estimates.
On the other hand, Musk also owns around 12% of Tesla, valued at $178 billion, along with stock options worth another $124 billion, excluding a massive performance-linked pay package approved recently.
In a span of just months between October and December 2025, Elon Musk crossed $500 billion, $600 billion and $700 billion net worth milestones, driven by Tesla share gains, restored Tesla stock options and SpaceX’s valuation surge.
Musk now stands $578 billion ahead of second-ranked Larry Page and is moving closer to becoming the world’s first trillionaire if current growth and his performance targets for Tesla are achieved.
