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Billionaire Bill Ackman Just Loaded Up on Microsoft Stock. Should You Follow?

Reported by Theglobeandmail
May 28, 2026· 2 min read
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Key Takeaways
  • • Bill Ackman's Pershing Square Capital Management purchased over $2 billion worth of Microsoft stock in Q1 2026, establishing the position as more than 15% of the fund's total assets under management.
  • • Microsoft's valuation appears historically discounted on a price-to-cash-flow basis, despite strong operational fundamentals including 18% year-over-year revenue growth in Q1, driven primarily by Azure cloud computing division expansion.
  • • Ackman's value-oriented investment thesis centers on Microsoft's depressed valuation relative to peers, attributing the discount to accounting distortions from unrealized OpenAI investment gains and elevated capital expenditures rather than fundamental business deterioration.
  • • Microsoft's earnings metrics are obscured by non-cash items (OpenAI paper gains) and depreciation impacts from heavy capex spending, making operating cash flow a more appropriate valuation benchmark than traditional price-to-earnings ratios.
Summary
Bill Ackman's Pershing Square Capital Management initiated a substantial position in Microsoft during the first quarter of 2026, acquiring over $2 billion in stock that now represents more than 15% of the fund's portfolio. This aggressive positioning from one of Wall Street's most prominent value investors signals a conviction thesis in the technology giant, warranting scrutiny from institutional investors tracking high-conviction billionaire deployments.

Ackman's investment rationale centers on perceived valuation dislocation rather than operational concern. Microsoft has delivered strong financial performance, with Q1 revenue climbing 18% year-over-year, with Azure—the company's cloud computing division—serving as the primary growth engine. The firm continues to compete effectively among AI hyperscaler peers, yet the stock has declined to historically discounted levels on a price-to-cash-flow basis, suggesting the market is pricing in risks not evident in the underlying business trajectory.

The primary valuation headwind appears structural rather than cyclical. Microsoft's reported earnings metrics are distorted by two offsetting factors: substantial unrealized gains on its OpenAI investment (which must be reported as income despite no corresponding asset sales) and elevated capital expenditures that increase depreciation charges. These accounting effects compress net income and traditional price-to-earnings multiples, rendering them unreliable valuation benchmarks. When measured against operating cash flow—a metric that isolates actual cash generation from accounting artifacts—Microsoft trades at levels not seen in nearly a decade, aligning with Ackman's characteristically contrarian, value-oriented approach.

Ackman's positioning reflects confidence that Microsoft's current valuation does not reflect fundamental deterioration. With strong revenue growth, competitive positioning in artificial intelligence infrastructure, and substantial cash-generating capability obscured by accounting presentation, the stock appears to offer the asymmetric risk-reward profile typical of Ackman's investment targets: a high-quality asset trading at a meaningful discount to intrinsic value. The question for other institutional investors centers not on whether to mimic the position, but rather whether their own analytical frameworks identify similar valuation opportunities in technology equities.

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Theglobeandmail Billionaire Bill Ackman Just Loaded Up on Microsoft Stock. Should You Follow?