Bill Ackman announced on social media that his hedge fund Pershing Square will disclose a new position in Microsoft in a 13F filing with regulators today. Microsoft has been an outlier in the tech trade that has carried markets higher this year. "We began building our position in MSFT in February following a meaningful share price decline after the company reported its fiscal Q2 2026 results," Ackman wrote in a post on X. "We were able to establish our position at a valuation of 21 times forward earnings, broadly in line with the market multiple and well below Microsoft's trading average over the last few years."