Getty Images Warren Buffett, Chairman and CEO of Berkshire Hathaway.Count Warren Buffett as one of the Apple Inc. investors cheering Wednesday as the tech giant’s shares jumped almost 6% a day after posting a positive earnings report and outlook. That’s because the billionaire chairman of Berkshire Hathaway Inc.BRK.B, -0.01% likely made more than $2.6 billion in a single day as Apple shares spiked. As of the end of March, Berkshire Hathaway held 239.6 million Apple sharesAAPL, +5.89% , according to FactSet data. Assuming it hasn’t sold any — Berkshire has been loading up on Apple, buying 75 million shares in the first quarter alone — that’s a profit of about $8 billion in four months, and a $48 billion overall stake in Apple.via