Who owns Microsoft? Ownership structure explained (2026)

When you search "who owns Microsoft," you are asking about one of the most valuable companies in the world. Microsoft builds the software that runs most of the world's offices, operates the second-largest cloud platform after Amazon, and owns everything from Windows to Xbox. Who owns the company shapes how it prices its products, how much it invests in AI, and how it competes with rivals like Google.

Microsoft's ownership story is unusual for a company its size. It went public in 1986, minting thousands of employee millionaires, and its two co-founders once owned nearly all of it. Today neither founder runs the company, and the largest blocks of stock sit with index fund managers rather than any individual.

This article breaks down Microsoft's full ownership structure: its largest institutional and individual shareholders, the people who run the company, how ownership has shifted since 1975, and why it matters for customers, competitors, and investors.

Microsoft Corporation is the world's largest software company by revenue and one of the two largest cloud providers. Its products span Windows, the Microsoft 365 and Office suite, the Azure cloud platform, LinkedIn, Xbox and gaming, the Bing search engine, Copilot AI assistants, and Surface devices.

Bill Gates and Paul Allen founded Microsoft in 1975 in Albuquerque, New Mexico. The company is now headquartered in Redmond, Washington, and employs more than 200,000 people worldwide.

Key figures give a sense of Microsoft's scale:

Microsoft reports revenue in three segments. Productivity and Business Processes, about $122 billion in fiscal 2025 and up 13%, includes Microsoft 365, LinkedIn, and Dynamics. Intelligent Cloud, about $105 billion, is led by Azure and server products and depends heavily on Nvidia GPUs to train and run AI models. More Personal Computing, about $54 billion, covers Windows, Gaming including Xbox and Activision Blizzard, Search, and devices. In its first quarter of fiscal 2026, ended September 30, 2025, Microsoft grew revenue 18%, with Azure up 40%.

Microsoft is a widely held public company. No single person or institution owns a majority of the stock. Ownership is spread across thousands of institutional investors, index funds, and individual shareholders. Institutional investors hold roughly 76% of outstanding shares.

Based on the most recent 13F filings, with holdings as of September 30, 2025, the largest institutional shareholders are:

These figures are approximate and based on the most recent SEC filings; holdings shift every quarter. Vanguard and BlackRock hold most of their Microsoft stock through index funds, so their positions grow mechanically as Microsoft's weight in the S&P 500 and Nasdaq-100 rises. They rarely take activist positions.

Steve Ballmer, Microsoft's CEO from 2000 to 2014, is the company's largest individual shareholder. His last public disclosure, in 2014, showed about 333 million shares, roughly 4% of the company. He has not been required to report his holdings since leaving the board, but he has said Microsoft still makes up around 80% of his portfolio. Ballmer joined Microsoft in 1980 as its first business manager.

Bill Gates, the co-founder, owned roughly 49% of Microsoft at its 1986 IPO. He has sold or given away most of that stake over the decades. His last disclosure before leaving the board in 2020 showed about 103 million shares, near 1.4% at the time. Much of his remaining wealth and Microsoft stock has moved to the Bill & Melinda Gates Foundation and his investment firm, Cascade Investment. His current direct holding is not disclosed and is estimated at around 1% or less.

Satya Nadella, the chairman and CEO, held about 900,000 shares as of September 2025, roughly 0.01% of the company. That makes him the largest individual insider holder among current executives, though the stake is small relative to Microsoft's size. His holdings come mostly from stock-based pay.

Unlike Alphabet, Meta, or Snap, Microsoft uses a single class of common stock. Every MSFT share carries one vote. There are no supervoting shares and no dual-class structure that gives a founder outsized control. Voting power tracks economic ownership: Vanguard's roughly 9% stake carries roughly 9% of the vote, and no insider can override shareholders. This makes Microsoft's board more accountable to institutional investors than founder-controlled peers like Meta.

The largest ongoing shifts in Microsoft's ownership are mechanical. As index funds attract inflows and Microsoft's market value rises, Vanguard, BlackRock, and State Street steadily accumulate more shares.

On the insider side, executives including Nadella sell shares periodically under pre-arranged 10b5-1 plans, and Bill Gates has continued to transfer stock to the Gates Foundation. None of these moves changes the broad picture: passive institutions on top, no controlling individual.

Owning stock and running the company are two different things at Microsoft. The biggest shareholders are passive fund managers. The people who actually set strategy are a small group of executives and directors.

Satya Nadella became Microsoft's CEO in February 2014, the third person to hold the job after Bill Gates and Steve Ballmer. He joined Microsoft in 1992 and previously ran its cloud and enterprise group, where he helped build Azure.

Nadella's tenure has been defined by the shift to cloud and AI. Under him, Microsoft's market value grew more than tenfold, Azure became the company's growth engine, and Microsoft closed its $69 billion acquisition of Activision Blizzard in 2023 and deepened its partnership with OpenAI. In October 2025, after OpenAI's recapitalization, Microsoft held a stake of roughly 27% in OpenAI Group PBC, valued at about $135 billion. Nadella also serves as chairman of the board, a role he took on in 2021.

Unlike many large companies, Microsoft combines the chair and CEO roles. Satya Nadella has served as chairman since 2021, when he succeeded John Thompson. The board includes a lead independent director for oversight. Combining the two roles gives Nadella broad authority over both strategy and governance, though he holds very little stock.

There are none. No individual or institution holds a controlling stake or special voting rights. Vanguard's roughly 9% is the largest single position, and Steve Ballmer's estimated 4% is the largest individual holding. Because every share votes equally, control rests with the broad base of shareholders, exercised mainly through annual board elections and shareholder proposals.

Neither co-founder runs Microsoft today. Bill Gates stepped down as CEO in 2000, left his day-to-day role in 2008, gave up the chairmanship in 2014, and resigned from the board in March 2020. He remains an occasional technology adviser but holds no executive role. Paul Allen left Microsoft in 1983 and died in 2018; his stake passed to his estate and philanthropy. Steve Ballmer left the board in 2014 and now owns the Los Angeles Clippers.

Microsoft's ownership has moved from two founders who owned nearly all of it to one of the most widely held stocks in the world. Here are the key moments.

Bill Gates and Paul Allen founded Microsoft in 1975 to sell a BASIC interpreter for early personal computers. Gates held the larger share of the partnership. The 1980 agreement to provide the operating system for IBM's PC set up decades of growth and made the company's equity extraordinarily valuable.

Steve Ballmer joined in 1980 as the first business manager and took a small ownership stake. Microsoft stayed privately held by its founders and employees until the mid-1980s, raising almost no outside venture capital compared with later tech companies.

Microsoft went public on March 13, 1986, pricing its IPO at $21 per share on the Nasdaq. The offering valued the company at roughly $780 million. Bill Gates, then 30, became a billionaire on paper the following year, and employee stock options created thousands of millionaires over the next decade.

At the IPO, Gates owned about 49% of Microsoft. He remained the largest shareholder for years, with Ballmer building the second-largest individual position.

As Gates and Ballmer sold and donated shares over the following decades, ownership shifted toward institutions. Today index fund managers like Vanguard and BlackRock hold the largest blocks, and Microsoft is one of the most widely held stocks in the world. Ballmer is the largest individual holder, but even his stake is a small single-digit percentage.

Two recent deals reshaped what Microsoft owns. In October 2023 it closed its $69 billion acquisition of Activision Blizzard, its largest ever. In October 2025, after OpenAI restructured, Microsoft held a stake of about 27% in OpenAI Group PBC, valued at roughly $135 billion.

Microsoft's ownership structure is not itself controversial: it has no dual-class shares and no controlling investor. But its scale has drawn decades of antitrust scrutiny that shapes how it can grow.

Microsoft's defining antitrust fight came in the United States in the late 1990s, when a federal court found it had illegally maintained its Windows monopoly by bundling Internet Explorer. The case, settled in 2001, constrained the company's conduct for years and is still cited as a template for modern tech antitrust actions.

More recently, the European Commission scrutinized Microsoft's bundling of its Teams communication app with Office. Microsoft unbundled Teams and reached a settlement with EU regulators in 2025 to avoid a fine.

Microsoft's $69 billion purchase of Activision Blizzard, announced in 2022, faced heavy regulatory review. The US Federal Trade Commission sued to block it, and the UK Competition and Markets Authority initially rejected it over cloud gaming concerns. Microsoft closed the deal in October 2023 after agreeing to license Activision's games, including Call of Duty, to rival platforms.

Microsoft's OpenAI partnership has itself drawn antitrust interest in the US, UK, and EU, as regulators weigh how much control the deal gives Microsoft over a leading AI developer. Regulators have so far allowed the arrangement, noting Microsoft does not hold a controlling board seat at OpenAI.

These reviews do not change who owns Microsoft's shares, but they shape how the company can spend its capital and which acquisitions it can complete.

For a company as large as Microsoft, ownership is not an abstract question. It affects the software businesses rely on, the price of that software, and how aggressively Microsoft invests in AI.

Because no single person controls Microsoft, its board and management answer to a broad base of institutional investors focused on margins, cash flow, and returns. That pressure shows up in decisions like large AI capital spending, price increases on Microsoft 365, and buybacks and dividends.

The single-class share structure matters too. It means shareholders, not a founder, ultimately decide the board. Activist campaigns and shareholder proposals, on issues from AI ethics to executive pay, can gain real traction, unlike at founder-controlled peers.

For customers, this shapes pricing and product roadmaps. For competitors, it determines how much Microsoft can spend to enter a market. For investors, knowing that passive funds dominate the register, with no controlling insider, is essential context for where the company goes next.

Satya Nadella has been Microsoft's CEO since February 2014 and its chairman since 2021. He joined the company in 1992 and previously led its cloud business. He is the third CEO in Microsoft's history, after Bill Gates and Steve Ballmer.

Yes. Microsoft trades on the Nasdaq under the ticker MSFT and has been public since its IPO on March 13, 1986. As of mid-2026, its market capitalization is about $2.86 trillion.

Bill Gates and Paul Allen founded Microsoft in 1975. Gates led the company as CEO until 2000 and as chairman until 2014. Allen left in 1983 and died in 2018.

The largest overall holder is Vanguard Group, with about 9.4% of shares, followed by BlackRock (about 8%) and State Street (about 4%). The largest individual shareholder is Steve Ballmer, the former CEO, with an estimated 4% stake.

Only a small fraction. Gates owned roughly 49% at the 1986 IPO but has sold or donated most of his shares over the decades, much of it to the Bill & Melinda Gates Foundation. His last public filing before leaving the board in 2020 showed about 103 million shares, near 1.4% at the time. His current direct stake is not disclosed and is believed to be around 1% or less.

After OpenAI's October 2025 recapitalization, Microsoft held a stake of roughly 27% in OpenAI Group PBC, valued at about $135 billion. OpenAI is controlled by its nonprofit parent, the OpenAI Foundation, not by Microsoft.