Warren Buffett stepped down as Berkshire Hathaway’s chief executive at the beginning of 2026. His handpicked successor, Greg Abel, assumed the role in January. Markets took notice. Then came the latest 13F filing. One name vanished from the portfolio. Mastercard was no longer there. Berkshire had built its position in the payments processor over more than a decade. The relationship started modestly in the first quarter of 2011 with an acquisition of 216,000 shares. Activity picked up. Additional purchases followed in subsequent quarters. By 2014 the stake had grown aggressively. Sales began in 2015. They continued intermittently. The final chapter arrived in the first quarter of 2026. Berkshire unloaded its remaining 3.99 million shares at an average price of $525.64. Prices during that period ranged from $484.24 to $580.34. The entire position disappeared. Berkshire also sold its Visa stake in the same quarter. Yahoo Finance reported the details . But Mastercard itself shows few signs of distress.…