Elon Musk just became the first person ever worth $800 billion or more after his rocket maker SpaceX acquired his artificial intelligence and social media company xAI.

Axar.az informs Forbes estimates that the deal, which values the combined company at $1.25 trillion, boosted Musk’s fortune by $84 billion, to a record $852 billion.

Before the deal, Musk owned an estimated 42% stake in SpaceX worth $336 billion, based on a tender offer launched in December that valued the privately-held rocket maker at $800 billion. He also owned an estimated 49% stake in xAI worth $122 billion, based on a private fundraising round that valued that company at $250 billion earlier this month. After the merger, which valued SpaceX at $1 trillion and xAI at $250 billion, Forbes estimates that Musk now owns a 43% stake in the combined company worth $542 billion.

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