Bill Ackman’s Pershing Square disclosed a new position in Microsoft (MSFT) on Friday, with Ackman calling the tech giant a “highly compelling valuation” after the stock dropped more than 15% this year.
Ackman announced the stake on X, saying Pershing Square’s 13F filing — due later Friday — would reveal the new position. He said the firm began accumulating the stock in February, following a post-earnings selloff.
“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,” Ackman wrote.
Microsoft stock was up around 1% on Friday after the news broke. The stock had already been under pressure in 2026, down more than 15% year-to-date heading into Friday’s session.
Bill Ackman just revealed a new Microsoft position
The billionaire investor says Pershing Square bought Microsoft $MSFT after its post-earnings selloff, calling the stock “highly compelling” at current valuations.
(Source: Barron’s) pic.twitter.com/cHqbbnCbO7
— Trader Edge (@Pro_Trader_Edge) May 15, 2026
The decline has been driven largely by investor concerns that Microsoft’s early lead in the AI race is being eroded. Both Google and Amazon have made strong progress in their own AI efforts, raising questions about whether Microsoft’s head start still means much.
Ackman’s new closed-end fund, Pershing Square USA, which began trading on the NYSE in late April 2026, has also added Microsoft as a core holding. That’s a separate vehicle from his main hedge fund.
The fund’s NYSE debut came just weeks before the Microsoft disclosure, putting two Pershing Square vehicles in the stock at the same time.
The Microsoft bet fits a pattern. Ackman has been steadily building out a Big Tech book over the past few years.
In February 2026, he disclosed a position in Meta, backing the company’s AI push. Before that, he invested in Amazon, and Pershing Square made a bet on Alphabet back in late 2022.
Microsoft is the latest addition to that list. Ackman hasn’t disclosed the size of the Microsoft position.
The entry point in February came after Microsoft reported earnings and the stock pulled back. Ackman said the valuation at that level was too good to pass up.
Microsoft has since remained under pressure. The stock’s 15%-plus drop in 2026 reflects broader concerns about AI competition, not just a short-term dip.
Ackman did not provide a price target or comment on how long Pershing Square plans to hold the position.
The 13F filing, which covers Q1 2026 holdings, was expected to be submitted to the SEC on Friday and will reveal the full size of the stake.
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