Key Takeaways
- • Bill Ackman's Pershing Square is taking a new position in Microsoft, citing "highly compelling valuation" after the stock declined more than 15% in 2026 following disappointing December quarter results and concerns over slowing cloud growth.
- • Pershing Square began accumulating Microsoft shares in February 2026, betting that competition concerns regarding Azure and changes to the OpenAI partnership are overblown and that Microsoft's dominant enterprise businesses (Azure cloud and M365 Office productivity suite) position it for long-term growth.
- • Ackman has allocated approximately 38% of Pershing Square's $15 billion stock portfolio to three major AI stocks, reflecting a conviction thesis that companies embracing AI will outperform those that do not, contrary to current market skepticism about tech's massive AI capital expenditures.
- • Pershing Square is simultaneously maintaining significant positions in Meta Platforms (roughly $2 billion, or 10% of portfolio capital) and Amazon (64% increase to 9.6 million shares), demonstrating a broad bet on large-cap tech's ability to monetize AI investments despite ongoing "AI spending scare" sentiment among investors.
- • Ackman publicly urged investors to "applaud, not boo" Big Tech's multibillion-dollar AI spending, arguing that such capital deployment is necessary for competitive survival and that the market's fear of valuation risk is misplaced given the long-term strategic returns.
Summary
Bill Ackman's Pershing Square hedge fund is making a bold contrarian bet on Microsoft at a moment when market sentiment around Big Tech's artificial intelligence spending has turned cautious. On May 15, 2026, Ackman announced the fund's new position in Microsoft, characterizing the company's valuation as "highly compelling" despite a sharp 15% decline in the stock price year-to-date. The selloff was triggered by slower-than-expected cloud computing growth in Microsoft's December quarter results and mounting investor concerns about the sustainability of the company's massive capital spending ramp on AI infrastructure.
Pershing Square began building its Microsoft position in February 2026, positioning itself to benefit from what Ackman views as a significant disconnect between the market's current pessimism and Microsoft's underlying competitive strengths. Ackman emphasizes that Microsoft operates two of the most valuable enterprise technology franchises: Azure, its cloud-computing division, and M365, its Office productivity suite that now includes a $30-per-month Copilot AI assistant. The billionaire investor dismisses recent headwinds, including increased competition from Google and Amazon in cloud infrastructure and Microsoft's loss of exclusive resale rights for OpenAI technology on Azure, as temporary setbacks that fail to undermine the company's durable market position.
Pershing Square's Microsoft position is part of a broader AI-centric investment strategy. The fund currently allocates approximately 38% of its $15 billion stock portfolio to three major artificial intelligence plays, including substantial positions in Meta Platforms (roughly $2 billion, representing approximately 10% of portfolio capital) and Amazon (recently increased by 64% to 9.6 million shares). This concentration reflects Ackman's conviction that large-cap technology companies will successfully monetize their AI investments and that those enterprises failing to embrace AI technology risk competitive obsolescence.
Ackman has become an increasingly vocal advocate for Big Tech's aggressive AI spending, publicly pushing back against criticism that such capital deployment constitutes an expensive arms race divorced from near-term profitability. In media appearances, including interviews with CNBC and statements on social media, Ackman has argued that "every company is an AI company today" and that those not embracing the technology "are going to fall behind." He urges investors to "stop booing" and instead "applaud" the technology giants' multibillion-dollar outlays, positioning himself as contrarian to the widespread skepticism that currently dominates market sentiment around AI valuation risk. Ackman's bet implicitly argues that Microsoft and other large-cap tech firms possess sufficient competitive moats and cash generation capacity to absorb near-term AI spending pressures and emerge as dominant players in the next decade.
Pershing Square began building its Microsoft position in February 2026, positioning itself to benefit from what Ackman views as a significant disconnect between the market's current pessimism and Microsoft's underlying competitive strengths. Ackman emphasizes that Microsoft operates two of the most valuable enterprise technology franchises: Azure, its cloud-computing division, and M365, its Office productivity suite that now includes a $30-per-month Copilot AI assistant. The billionaire investor dismisses recent headwinds, including increased competition from Google and Amazon in cloud infrastructure and Microsoft's loss of exclusive resale rights for OpenAI technology on Azure, as temporary setbacks that fail to undermine the company's durable market position.
Pershing Square's Microsoft position is part of a broader AI-centric investment strategy. The fund currently allocates approximately 38% of its $15 billion stock portfolio to three major artificial intelligence plays, including substantial positions in Meta Platforms (roughly $2 billion, representing approximately 10% of portfolio capital) and Amazon (recently increased by 64% to 9.6 million shares). This concentration reflects Ackman's conviction that large-cap technology companies will successfully monetize their AI investments and that those enterprises failing to embrace AI technology risk competitive obsolescence.
Ackman has become an increasingly vocal advocate for Big Tech's aggressive AI spending, publicly pushing back against criticism that such capital deployment constitutes an expensive arms race divorced from near-term profitability. In media appearances, including interviews with CNBC and statements on social media, Ackman has argued that "every company is an AI company today" and that those not embracing the technology "are going to fall behind." He urges investors to "stop booing" and instead "applaud" the technology giants' multibillion-dollar outlays, positioning himself as contrarian to the widespread skepticism that currently dominates market sentiment around AI valuation risk. Ackman's bet implicitly argues that Microsoft and other large-cap tech firms possess sufficient competitive moats and cash generation capacity to absorb near-term AI spending pressures and emerge as dominant players in the next decade.
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