--- title: "Pershing Backs Microsoft As Core Holding While AI And UK Probe Evolve" type: "News" locale: "en" url: "https://longbridge.com/en/news/286647607.md" description: "Bill Ackman's Pershing Square has made Microsoft a core holding after exiting Alphabet. The UK has launched an antitrust investigation into Microsoft, which is also adjusting its AI strategy by limiting revenue sharing with OpenAI and seeking AI startup acquisitions. Microsoft stock is currently down 10.8% year-to-date but has seen significant long-term gains. Investors should monitor the antitrust probe and AI developments as they may impact Microsoft's future bargaining power and margins." datetime: "2026-05-16T14:11:52.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/286647607.md) - [en](https://longbridge.com/en/news/286647607.md) - [zh-HK](https://longbridge.com/zh-HK/news/286647607.md) --- # Pershing Backs Microsoft As Core Holding While AI And UK Probe Evolve - Bill Ackman’s Pershing Square has made Microsoft (NasdaqGS:MSFT) a core holding after exiting its Alphabet position. - The UK Competition and Markets Authority has opened a formal antitrust investigation into Microsoft’s software and cloud business practices. - Microsoft is reshaping its AI approach by capping revenue sharing with OpenAI and pursuing acquisitions of AI startups. Microsoft, trading at $421.92, sits at the center of several meaningful shifts that matter for anyone watching large cap tech. The stock is up 35.4% over 3 years and 78.9% over 5 years, but down 10.8% year to date and 6.6% over the past year. This performance frames the backdrop for Pershing Square’s decision to make it a core holding. For investors, that mix of longer term gains and more recent pressure is a key part of how this new interest from Bill Ackman may be interpreted. At the same time, the UK antitrust probe and Microsoft’s reset of its OpenAI partnership, together with its push to acquire AI startups, highlight how regulatory and AI decisions are becoming more interconnected for the company. Readers weighing NasdaqGS:MSFT now need to consider how these moves could influence future bargaining power in AI, potential legal constraints on software bundling, and the way large institutional investors respond to those cross currents. Stay updated on the most important news stories for Microsoft by adding it to your watchlist or portfolio. Alternatively, explore our Community to discover new perspectives on Microsoft. NasdaqGS:MSFT 1-Year Stock Price Chart See which insiders are buying and buying and selling Microsoft following this latest news. ## Investor Checklist ### Quick Assessment - **✅ Price vs Analyst Target**: At $421.92, Microsoft trades about 25% below the $561.56 analyst target. - **✅ Simply Wall St Valuation**: The stock is flagged as undervalued, trading 26% below the estimated fair value. - **✅ Recent Momentum**: A 0.4% gain over the last 30 days suggests relatively steady short term price action. There is only one way to know the right time to buy, sell or hold Microsoft. Head to Simply Wall St's company report for the latest analysis of Microsoft's Fair Value. ### Key Considerations - 📊 Pershing Square making Microsoft a core holding highlights how some large investors view the stock at its current valuation and AI positioning. - 📊 Watch developments in the UK antitrust probe, the terms of the OpenAI revenue cap, and any AI startup deals for clues on future bargaining power and margins. - ⚠️ The most immediate flagged issue is significant insider selling over the past 3 months, which some investors treat as a caution signal. ### Dig Deeper For the full picture including more risks and rewards, check out the complete Microsoft analysis. Alternatively, you can visit the community page for Microsoft to see how other investors believe this latest news will impact the company's narrative. _This article by Simply Wall St is general in nature. **We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice.** It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned._ ### **New:** Manage All Your Stock Portfolios in One Place We've created the **ultimate portfolio companion** for stock investors, **and it's free.** • Connect an unlimited number of Portfolios and see your total in one currency • Be alerted to new Warning Signs or Risks via email or mobile • Track the Fair Value of your stocks Try a Demo Portfolio for Free ### Related Stocks - [MSFO.US](https://longbridge.com/en/quote/MSFO.US.md) - [MSFL.US](https://longbridge.com/en/quote/MSFL.US.md) - [MSFX.US](https://longbridge.com/en/quote/MSFX.US.md) - [MSFD.US](https://longbridge.com/en/quote/MSFD.US.md) - [MSFU.US](https://longbridge.com/en/quote/MSFU.US.md) - [MSFT.US](https://longbridge.com/en/quote/MSFT.US.md) - [GOOGL.US](https://longbridge.com/en/quote/GOOGL.US.md) - [GOOG.US](https://longbridge.com/en/quote/GOOG.US.md) ## Related News & Research - [Dubai Holding collaborates with Microsoft to integrate AI into core of its operations](https://longbridge.com/en/news/286761090.md) - [3G Capital Exits Microsoft Stock in Major Portfolio Shift. 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