Who Owns Microsoft (MSFT)? Institutional Ownership Map

Who owns the most Microsoft?

The largest disclosed Microsoft holders are the index giants. This is the single most important fact about MSFT ownership and the one most "who owns Microsoft" answers get wrong by leading with a hedge fund: the biggest holders are the funds that have to own Microsoft because it is a top weight in the S&P 500 and Nasdaq 100.

Values are each filer's reported long position as of its most recent 13F; live figures and the full holder list are on the Microsoft ownership page. The "as of" column matters: 13F filings arrive asynchronously, so one quarter's largest filer may be a quarter ahead of another's.

The passive core vs the active money

Read MSFT's holder list as two layers.

The passive core is the top of the table: Vanguard, BlackRock, State Street, Geode, and the index sleeves inside Fidelity. These managers hold Microsoft in proportion to its index weight. Their quarter-over-quarter moves track fund flows and index rebalancing far more than any view on the stock. When Vanguard "adds" 2.3%, that is mostly new money flowing into total-market and S&P 500 funds, not a Vanguard analyst turning bullish.

The active money is everyone making a position-sizing decision. That is where the signal lives, and it is mostly further down the list. The headline active move last quarter came from Daiwa Securities Group, which increased its disclosed MSFT position by roughly 90%, alongside the Public Sector Pension Investment Board (up about 20%) and Grantham, Mayo, Van Otterloo & Co. (up about 17%). Generation Investment Management, the sustainability-focused firm co-founded by Al Gore, added about 8%. On the other side, Winslow Capital Management cut its disclosed long by about 29%, Bank of Nova Scotia by about 19%, and Storebrand Asset Management by about 9%. None of those is a verdict on the stock by itself, but a screen of who is adding versus trimming, weighted by manager quality, is the actual use of this data. The smart-money leaderboard is the practical starting view.

One nuance specific to mega-caps like Microsoft: hedge funds frequently express MSFT views through options, and 13F reports put and call positions as flagged rows valued against the underlying. A naive aggregator that sums every MSFT row into a "long book" turns a protective put into a bullish bet. Our data separates option legs from the long-equity book, so a manager's reported MSFT long is the share position, not a blended notional. (More on that trap: 13F options, puts and calls explained.)

A data-quality footnote: the Vanguard reorg

If you pull MSFT ownership from raw EDGAR right now, you will see three Vanguard entities reporting Microsoft: Vanguard Group plus two newer entities (Vanguard Portfolio Management LLC and Vanguard Fiduciary Trust) that began filing separately after an internal reorganization. Sum all three and you double-count tens of billions of dollars of the same shares. This is the kind of identifier and entity-resolution problem that makes institutional ownership data hard to keep clean, and it is exactly what a sourced, deduplicated layer is for. We model the reorg so the combined view does not inflate Vanguard's true position. (Background: 13F amendments and restatements.)

What 13F does and does not tell you about MSFT

Four limits to keep in mind before treating any "who owns Microsoft" number as complete:

• It lags up to 45 days. A 13F reports positions as of quarter-end and is due 45 days later, so the picture can be a full quarter stale by the time you read it. MSFT can move sharply in that window.
• It is long-only. 13F covers long positions in 13(f) securities. Short positions, cash, and most derivatives net exposure do not appear. A fund that looks "long MSFT" on a 13F may be hedged.
• It misses smaller and foreign holders. Only managers with $100M+ in 13(f) securities must file a Form 13F, so retail, smaller funds, and many non-US holders are invisible here.
• Insiders file separately. Microsoft's own officers and directors report their trades on Form 4 within two business days, a different and faster feed than 13F. See insider activity for MSFT and the filing-type comparison.

The honest summary: 13F tells you which large institutions disclosed a Microsoft long position at the last quarter-end and how it changed, not who owns Microsoft in real time.

How to track Microsoft ownership as it updates

The durable workflow is to resolve the entity once, pull the holder list, and diff across quarters rather than reading a single filing. With the REST API:

curl -H "Authorization: Bearer YOUR_KEY" \
  "https://arkolith.com/api/v1/stocks/MSFT"

For an AI agent, the same data is exposed through MCP tools so the assistant can answer "which funds added Microsoft last quarter" directly, with each figure carrying its source filing and quarter. Start with the MCP quickstart, the 13F data layer, or the live Microsoft ownership page. Every figure on those surfaces is sourced to its SEC EDGAR accession, which is the point: an ownership claim without a filing date and quarter-end is incomplete.

Frequently asked questions

Who is Microsoft's largest shareholder?

Among institutional 13F filers, Vanguard Group reports the largest Microsoft position, around $347 billion at its latest filing, followed by BlackRock at around $220 billion. Both are index-fund managers holding Microsoft in line with its weight in major indexes, not active stock-pickers.

How many institutions own Microsoft?

826 institutional managers disclose a Microsoft long position in their most recent 13F filings in our dataset. That count covers managers with at least $100M in 13(f) securities; it excludes retail holders, smaller funds, and many foreign holders that do not file 13F.

Which hedge funds own Microsoft?

Many do, but most hold far smaller stakes than the index giants and frequently use options. Recent active moves include Daiwa Securities Group boosting its long position by about 90% and Generation Investment Management adding around 8%, while Winslow Capital Management and Bank of Nova Scotia trimmed theirs. Screen the full list, weighted by manager quality, on the investors leaderboard rather than reading one fund in isolation.

Is Microsoft mostly owned by index funds?

At the top of the cap table, yes. The five largest disclosed holders are all index or quasi-index managers (Vanguard, BlackRock, State Street, Fidelity, Geode), whose stakes track index weight and fund flows. The active, conviction-driven positions sit lower in the list and are where quarter-over-quarter changes carry the most signal.

Is 13F ownership data live?

No. A 13F is a quarterly snapshot filed up to 45 days after quarter-end, so Microsoft's disclosed ownership can be months old by the time it publishes. Use it for institutional positioning and quarter-over-quarter changes, never as a live book.

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Arkolith turns SEC ownership filings into clean, sourced, queryable data. See the live Microsoft ownership page, connect an agent through the MCP quickstart, or get a key. Not investment advice.