Bill Ackman's Pershing Square Invests in Undervalued Microsoft Amid AI and Cloud Expansion
May 15, 2026
Market concerns center on Azure’s growth trajectory and AI-related spend, plus Microsoft’s ability to meet rising cloud demand.
Internal AI division restructuring and some product naming confusion add scrutiny to execution, while research notes potential risks from large language models.
Microsoft’s integration of OpenAI models across Copilot, Azure, and developer tools is a major growth driver, with ongoing capex required to maintain the lead.
Azure stands to benefit from long-term demand for cloud workloads and AI inference, reinforcing its position as a leading hyperscaler.
Bill Ackman's Pershing Square reveals a new Microsoft stake on a day when MSFT traded at a discount, driven by a compelling valuation from a recent dip and optimism around enterprise AI bets like Azure and Copilot.
GF Score rates MSFT highly at 95/100 for profitability and growth, with strong financial strength and solid valuation, though momentum is modest.
GuruFocus flags Microsoft as about 25% undervalued, with a current price around $409 against a GF Value near $549 and a price/earnings multiple lower than the five-year median."
The move fits a wider tech trend of investing in AI capabilities to safeguard competitive position and fuel long-term growth.
Risks to watch include Azure growth, Copilot enterprise uptake, and competition from AWS and Google Cloud in cloud services.
The AI capex backdrop underpins the sector, with hyperscalers committing substantial spending to AI infrastructure in 2026, shaping investor valuations.
Google’s ad-driven model faces disruption in an AI-first era, contrasting with Microsoft’s subscription-focused enterprise revenue.
Ackman points to ongoing R&D and Copilot development under CEO Satya Nadella, suggesting these efforts will drive velocity and adoption over time.
Summary based on 19 sources
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Sources

New York Post • May 15, 2026
Bill Ackman's Pershing Square discloses Microsoft stake, touts 'deeply embedded' software
The Next Web • May 15, 2026
Bill Ackman moves into Microsoft, with the size to be disclosed today
Economic Times • May 15, 2026
Bill Ackman's Pershing Square takes stake in Microsoft, citing 'compelling' valuation