Elon Musk's net worth has surpassed $850 billion after SpaceX acquired his AI company, xAI, in a deal valued at $1.25 trillion. According to NS3.AI, SpaceX now stands as Musk's largest asset, with a valuation of $1 trillion, while xAI contributes $250 billion to his portfolio. The merger presents regulatory challenges and positions SpaceX for a potential initial public offering (IPO) in 2026, significantly reshaping Musk's investment portfolio and market influence.