Microsoft Corporation

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Bullish +75

Bill Ackman Just Bought Microsoft Stock — Here’s Why It Could Be His Biggest Bet Yet

📉 Microsoft (MSFT) shares have declined over 15% year-to-date, trading at $409.43 as investors weigh competitive pressures from Amazon and Google.

💰 The company recently reported quarterly revenue of $82.89 billion with 18% year-over-year growth, while Azure expanded by 40%.

🤖 Bill Ackman of Pershing Square initiated a significant position in Microsoft in February during the recent stock decline.

🎯 Ackman views the purchase as an opportunity to gain exposure to enterprise AI adoption via Azure and M365 Copilot monetization at $30 per user monthly.

⚠️ Competitive concerns regarding Azure's market share and OpenAI distribution rights have been downplayed by Ackman in his investment thesis.

🏦 Pershing Square maintains a highly concentrated portfolio strategy, holding approximately 12 positions for its $15.5 billion assets under management.

💼 Ackman previously established similar large stakes in Brookfield ($2.8B), Uber ($2.5B), and Meta ($1.8B) without diversifying into smaller amounts.

📊 Microsoft posted earnings of $4.27 per share against a consensus of $4.07, with the AI business reaching a $37 billion annualized run rate.

🧠 Ackman noted that the current valuation of 21x forward earnings is broadly in line with the market and well below historical averages.

🔮 The full size of Ackman's new Microsoft stake is expected to be revealed when Pershing Square files its Q1 2026 13F form today.

🚀 This investment could potentially challenge Brookfield as Ackman's largest holding if the position grows similar to his past major bets.

📈 The strong revenue growth, particularly in Azure and AI services, aligns with Ackman's historical pattern of investing in undervalued tech leaders.

🛡️ Ackman's confidence stems from his track record at Pershing Square, which generated a 692% net return over its first decade versus 132% for the S&P 500.

Bullish Signals
  • Microsoft generated $82.89 billion in quarterly revenue, representing an 18% year-over-year growth.
  • Azure cloud platform expanded by 40%, positioning the company at the heart of enterprise AI adoption.
  • The AI business reached a $37 billion annualized run rate, up 123% year over year.
  • Microsoft trades at 21x forward earnings, providing a valuation entry point broadly in line with market multiples and well below its trading average over the last few years.
  • Bill Ackman's Pershing Square initiated a significant position in February following the company's fiscal second-quarter earnings report.
  • The M365 Copilot monetization is priced at $30 per user monthly, capturing strong demand for enterprise AI tools.
  • Microsoft Q3 fiscal 2026 report delivered earnings of $4.27 per share against a $4.07 consensus estimate.
  • Ackman argues that competitive pressures and the OpenAI arrangement restructuring have been exaggerated, suggesting significant upside potential.
Risk Factors
  • Microsoft shares have shed more than 15% year-to-date, trading at $409.43 as of yesterday, reflecting significant investor concern and a beaten-up stock price.
  • Competitive pressures from rivals Amazon and Google pose a threat to Microsoft's market position in the critical Azure cloud platform segment.
  • The company faces scrutiny over its massive $190 billion capital spending plan for the year, which could strain resources and impact near-term profitability.
  • Ackman noted that the restructured OpenAI arrangement has resulted in Microsoft losing its sole right to distribute OpenAI's technology, introducing a potential risk to future AI revenue streams.
  • The competitive landscape for Azure remains intense, challenging the assumption of uncontested dominance in the enterprise AI adoption space.
  • Microsoft's fiscal second-quarter earnings report triggered an initial stock decline that Ackman exploited, indicating lingering market skepticism about the company's growth sustainability or valuation.
Full Analysis
Pershing Square, the hedge fund founded by Bill and Karen Ackman, has initiated a significant position in Microsoft (MSFT) following the company's recent stock weakness. Ackman disclosed this move via social media X, revealing that his firm began accumulating shares in February after MSFT's fiscal second-quarter earnings report caused the stock to decline. This investment represents a high-conviction bet on Microsoft's core growth drivers: the Azure cloud platform, which saw 40% expansion during the quarter, and the monetization of M365 Copilot at $30 per user monthly. Ackman views Microsoft's current valuation of 21 times forward earnings as attractive and notes that competitive threats from Amazon and Google are exaggerated, particularly after the restructured OpenAI agreement removed Microsoft's exclusive distribution rights. The market context for this entry point is defined by a sharp correction; Microsoft shares have fallen over 15% year-to-date to close at $409.43, largely due to investor apprehension regarding Amazon and Google competition and the company's massive $190 billion capital spending plan. Despite these concerns, MSFT generated $82.89 billion in quarterly revenue with an 18% year-over-year increase, and its AI business achieved a $37 billion annualized run rate that jumped 123% year over year in the latest fiscal third-quarter report. Ackman argues that this growth trajectory combined with the current multiple suggests the stock has not yet fully priced in Microsoft's long-term AI dominance. This purchase aligns with Pershing Square's historically concentrated investment strategy, which currently holds approximately $15.5 billion across only 12 stocks, averaging nearly $1.3 billion per position. Previous large allocations to companies like Brookfield and Meta demonstrate Ackman's pattern of deploying significant capital into undervalued technology leaders rather than diversifying broadly. While the exact size of this new MSFT stake remains undisclosed until the Q1 2026 13F filing is released today, the investment thesis relies on Azure dominance, enterprise AI adoption, and the belief that the stock price dip presents a buying opportunity comparable to his past successful large-position setups. If the position scales similarly to his recent Meta or Brookfield buys, it could challenge Brookfield as his largest holding, potentially reaching over $2.5 billion in total value within the portfolio.