Pershing Square takes Microsoft stake as Ackman cites compelling valuation

Bill Ackman’s Pershing Square will disclose a new position in Microsoft Corp. later on May 15, 2026, with the hedge fund manager saying the software company trades at a “highly compelling valuation.” Ackman said Pershing Square USA, his new closed-end fund that debuted on the NYSE in April 2026, has also recently made Microsoft a core holding. The position extends Pershing’s increased exposure to large-cap technology companies, following investments in Meta Platforms, Amazon and Alphabet. Microsoft shares have fallen more than 15% in 2026 as investors question whether the company’s early lead in artificial intelligence is narrowing amid advances by Google and Amazon in their own AI businesses.