Altimeter Capital Boosts Microsoft Stake to $601.91 Million

Hedge fund increases holdings in software giant by 9.8% in Q3

Mar. 15, 2026 at 8:54am

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Altimeter Capital Management LP increased its stake in Microsoft Corporation (NASDAQ:MSFT) by 9.8% in the third quarter, according to a recent SEC filing. The hedge fund now holds 1,162,092 shares of the software company worth $601,906,000, making Microsoft its third-largest position and accounting for nearly 8% of Altimeter's portfolio.

Why it matters

This investment highlights Altimeter's confidence in Microsoft's continued growth and dominance in the technology sector. As one of the largest institutional investors, Altimeter's increased stake signals that the hedge fund sees significant upside potential in Microsoft's stock.

The details

Altimeter Capital Management added 103,971 shares of Microsoft in the third quarter, bringing its total holdings to 1,162,092 shares. This represents approximately 7.9% of Altimeter's $7.6 billion portfolio, making Microsoft the fund's third-largest position behind only Amazon and Alphabet. The increased stake comes as Microsoft has seen its stock price fluctuate in recent months, trading between $344 and $555 over the past year.

  • Altimeter Capital Management filed its Q3 2026 13F report on March 15, 2026, disclosing the increased Microsoft stake.
  • Microsoft's stock price ranged from a 52-week low of $344.79 to a high of $555.45 over the past year.

The players

Altimeter Capital Management LP

A technology-focused hedge fund based in the San Francisco Bay Area with over $7.6 billion in assets under management.

Microsoft Corporation

A global technology company headquartered in Redmond, Washington that develops software, services, and devices including the Windows operating system and Microsoft 365 productivity suite.

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The takeaway

Altimeter Capital's increased stake in Microsoft underscores the hedge fund's bullish outlook on the software giant's long-term prospects. As one of the largest institutional investors, Altimeter's portfolio moves are closely watched by the market and provide insight into which tech companies top investors see as having the most growth potential.