Larry Ellison, the billionaire co-founder of Oracle, has seen his net worth drop by $25 billion in a single day, according to the Bloomberg Billionaire Index. The steep decline followed a more than 11% plunge in Oracle’s stock price after the company reported weaker-than-expected earnings results. The earnings miss came despite a 14% year-over-year revenue increase for the quarter. Still, investors reacted negatively, driven by growing concerns over Oracle’s aggressive spending on artificial intelligence infrastructure and the long-term financial sustainability of its cloud expansion. The stock had already been under pressure since October, as analysts questioned the scale and cost of the company’s data center buildout. During the earnings call, Oracle co-CEO Clay Magouyrk addressed speculation that the company might need more than $100 billion in funding for its AI ambitions. He pushed back, stating that Oracle expects to require less—possibly substantially less—than that amount, and reaffirmed that the company’s debt remains investment-grade. The drop marks one of the largest single-day wealth losses for any billionaire in 2025. Ellison’s net worth fell to $258 billion, though he remains among the wealthiest individuals globally. His recent fall from grace follows a brief period in September when he briefly surpassed Elon Musk to become the world’s richest person, fueled by a 43% surge in Oracle shares tied to strong cloud business forecasts. Other tech billionaires also faced significant losses in April. Elon Musk lost $35 billion over just three days, while Mark Zuckerberg shed around $24 billion. These declines were partly driven by rising fears over potential trade tensions and economic slowdowns, particularly in light of proposed tariff policies under a possible second Trump administration. Despite the sharp decline, Ellison’s wealth still exceeds that of Jeff Bezos and Mark Zuckerberg, underscoring his continued dominance in the tech and wealth landscape.