Bill Ackman says he built Microsoft position in first quarter

Bill Ackman, founder and CEO of Pershing Square Inc., attends his company’s IPO at the New York Stock Exchange (NYSE), in New York City, U.S., April 29, 2026. Brendan McDermid | Reuters Bill Ackman's Pershing Square has built a position in Microsoft , the billionaire hedge fund manager said Friday in a post on X . "As two of the largest forces in equity markets -- growing index ownership and increasing amounts of capital controlled by extremely short-term-oriented, leveraged, volatility-intolerant investors -- converge, we have found occasional opportunities to acquire some of the most dominant long-term compounding franchises at attractive valuations," the post said. "In our 13F which we will file later today, we will disclose a new position in Microsoft, a company we have followed for many years now offered at a highly compelling valuation." While Ackman didn't note the size of his stake in the tech giant, he called it a "core holding." Subscribe to CNBC PRO for exclusive insights and analysis, and live business day programming from around the world.