Key Takeaways
- • Pershing Square initiated a new $2.09 billion Microsoft position (15.3% of portfolio) in February 2026, betting on the software giant's artificial intelligence leadership as shares declined following its fiscal second-quarter results.
- • The fund completely exited its Hilton Worldwide holding and reduced its Alphabet stake by 95%, signaling a strategic shift away from these positions during Q1 2026.
- • Pershing Square increased its Amazon holding by 19%, maintaining exposure to cloud and AI infrastructure alongside its new Microsoft commitment.
- • Microsoft's stock had fallen approximately 15% year-to-date when Ackman began accumulating shares, with the position valued at $2.4 billion by end of the first quarter filing date.
Summary
Pershing Square Capital Management, the hedge fund managed by billionaire Bill Ackman, made significant portfolio adjustments during the first quarter of 2026, with the most notable move being the establishment of a substantial new position in Microsoft. The fund initiated a $2.09 billion stake in the software giant—representing 15.3% of Pershing Square's portfolio—explicitly positioning the investment as a bet on Microsoft's dominance in the artificial intelligence race. Ackman began accumulating the position in February after Microsoft's stock price declined following the company's fiscal second-quarter earnings announcement.
The Microsoft purchase reflects a calculated contrarian move, with the fund acquiring shares during a period of weakness when the stock had dropped approximately 15% year-to-date. By the end of the reporting period, the position had appreciated to $2.4 billion in value, underscoring Ackman's conviction in the technology company's long-term prospects in AI development and deployment. The timing and rationale suggest Pershing Square views current valuations as compelling despite near-term market skepticism.
Concurrent with the Microsoft buildup, Pershing Square made significant portfolio reductions that reveal a reshuffled conviction thesis. The fund completely exited its entire Hilton Worldwide position and substantially pared back its Alphabet holdings, cutting the Google parent company stake by 95%. These moves indicate a pivot away from hospitality exposure and a reduced conviction in Alphabet's AI positioning relative to Microsoft. The fund did increase its Amazon holding by 19%, maintaining meaningful exposure to cloud infrastructure and AI-adjacent businesses that complement the Microsoft thesis.
These portfolio moves underscore Ackman's active repositioning within the technology and AI sector, concentrating capital in what he views as superior AI beneficiaries while trimming or eliminating positions lacking comparable strategic positioning in the competitive AI landscape.
The Microsoft purchase reflects a calculated contrarian move, with the fund acquiring shares during a period of weakness when the stock had dropped approximately 15% year-to-date. By the end of the reporting period, the position had appreciated to $2.4 billion in value, underscoring Ackman's conviction in the technology company's long-term prospects in AI development and deployment. The timing and rationale suggest Pershing Square views current valuations as compelling despite near-term market skepticism.
Concurrent with the Microsoft buildup, Pershing Square made significant portfolio reductions that reveal a reshuffled conviction thesis. The fund completely exited its entire Hilton Worldwide position and substantially pared back its Alphabet holdings, cutting the Google parent company stake by 95%. These moves indicate a pivot away from hospitality exposure and a reduced conviction in Alphabet's AI positioning relative to Microsoft. The fund did increase its Amazon holding by 19%, maintaining meaningful exposure to cloud infrastructure and AI-adjacent businesses that complement the Microsoft thesis.
These portfolio moves underscore Ackman's active repositioning within the technology and AI sector, concentrating capital in what he views as superior AI beneficiaries while trimming or eliminating positions lacking comparable strategic positioning in the competitive AI landscape.
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