Reading Time: 2 minutesKey Takeaways:<\/p>\n
Microsoft is now a major part of Pershing Square\u2019s portfolio and the new $PSUS fund.
\nAckman started buying shares in February 2026 after the stock price fell.
\nThe stock was purchased at 21x forward earnings, which Ackman called a highly compelling price.
\nThe investment is based on Microsoft\u2019s leading role in the AI revolution and its integration of Copilot.<\/p>\n
Billionaire investor Bill Ackman has confirmed that Microsoft is now a core holding in Pershing Square\u2019s portfolio, taking advantage of price drop to secure a highly compelling valuation driven by the company\u2019s AI leadership.<\/p>\n
As two of the largest forces in equity markets \u2014 growing index ownership and increasing amounts of capital controlled by extremely short-term-oriented, leveraged, volatility-intolerant investors \u2014 converge, we have found occasional opportunities to acquire some of the most\u2026
\n\u2014 Bill Ackman (@BillAckman) May 15, 2026<\/p>\n
Strategic Accumulation During a Market Gap
\nBillionaire investor Bill Ackman officially added Microsoft to the core holdings of Pershing Square Capital Management. According to a 13F filing, Ackman began accumulating shares in February 2026. This move followed a sharp drop in Microsoft\u2019s stock price after the company released Fiscal Q2 results. During the same period, the Nasdaq index rose, then creating a massive performance gap. Ackman viewed this disconnect as a rare opportunity to buy the dip on one of the world\u2019s most dominant technology companies.
\nMicrosoft is now a major part of Pershing Square\u2019s portfolio
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\nAI Leadership and Compelling Valuation
\nThe core of Ackman\u2019s investment thesis is based on Microsoft\u2019s leadership in the artificial intelligence sector and its currently attractive valuation. He noted that the company is trading at approximately 21x forward earnings, which is in line with the broader market average but far below Microsoft\u2019s own average valuation from recent years. Ackman described this as a highly compelling entry point for a business that stands at the forefront of AI integration. This follows a similar move in February when he added Meta Platforms to his portfolio, signaling a strong shift toward large cap tech giants that are poised to benefit most from the AI revolution.
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\nA Central Pillar for Pershing Square USA
\nThis position is a part of the Pershing Square USA fund, a closed end fund that debuted on the New York Stock Exchange in April 2026. By making Microsoft a core holding, Ackman is pivoting his strategy to include more high growth technology names while maintaining his signature long term conviction approach. Despite a challenging performance for Pershing Square at the end of 2024, Ackman is betting that the combination of AI driven growth and a disciplined entry price will lead to a strong recovery for his investors throughout 2026.
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