Most Held Stocks by Hedge Funds: How to Read the Lists

Who counts as a hedge fund

An institutional manager with discretion over $100 million or more in Section 13(f) securities has to file a 13F (SEC Form 13F FAQ). That test is about size and doesn't ask what kind of firm you run, so someone has to separate the hedge funds from every other institution in the pile.

When Federal Reserve researchers did that sort for a 2014 working paper, they did it by hand and landed on 1,594 hedge fund firms among 13F filers from 2000 to 2012. A list maker may use a much shorter roster of well-known funds, and starting from identical filings with a different roster can produce different names at the top.

The SEC's Form PF data gives a sense of scale, though it's a separate data set from 13F. Its 2025 Q3 report counts 2,145 qualifying hedge funds, each with at least $500 million in net assets. They report about $12.2 trillion in gross assets on $4.75 trillion in net assets. The report's concentration table covers a wider group, all hedge funds rather than just the qualifying ones, and the top 10 hold 19.6% of that group's gross assets.

Three ways to count "most held"

Most rankings rely on one of three measures, and the choice of measure can reorder the entire list.

Here's an illustrative example with made-up numbers: Stock A is worth $1 trillion and one large fund owns $2 billion of it, while Stock B is worth $2 billion, and 40 small funds own $10 million each, or $400 million in total.

Rank by dollars and A comes first, while a ranking by number of funds or by share of the company puts B on top, since funds own 20% of B and 0.2% of A.

That 20% is high by one old yardstick. The same Fed paper found hedge funds owned 7% of outstanding shares at the typical listed firm, and the 90th percentile was 17%. The sample ends in 2012, so those figures work only as rough markers for current ownership.

Position size also changes the picture. A 2021 Fed working paper on long-short equity funds found an average of 50 long positions and a median of 36. A count-based list treats a fund's largest bet and its smallest one as one vote each.

What a 13F leaves out

A ranking built from these filings shows only part of a hedge fund's book, because the form's instructions exclude some positions altogether.

The SEC's FAQ is direct about the first two items on the right: "You should not include short positions on Form 13F," and "You should not report put or call options that you write."

The missing side is large, since Form PF data for September 2025 puts these funds' short exposure to listed stocks at about half the size of their long exposure.

A fund that owns one chipmaker and shorts a rival shows up on its 13F as a plain owner of the first. And since puts the manager holds can be reported, a list that lumps option lines in with shares may count a bearish bet as a holding.

The lag, with real dates

Say a fund buys a stock on October 1. The next quarter-end snapshot is December 31 and the filing can arrive as late as mid-February, so you could first see that position about four and a half months after the purchase.

The 2021 Fed paper found long positions stayed open for an average of 126 trading days, and short positions for 77. On that average, a long bought on October 1 would close around the end of March, roughly six weeks after that filing. Those are averages from one sample of long-short equity funds, so individual positions will run longer or shorter. A position opened and closed between two quarter ends never appears on the form.

When a popular stock gets crowded

Forty funds owning 20% of Stock B can look like a vote of confidence. It also means 20% of the company sits with holders who may need to sell in the same week.

"Stocks held by hedge funds experienced extreme declines in price efficiency during liquidity crises."

In plain words, when funding dried up, prices in those stocks did a worse job of reflecting available information about the companies. That sample covers 2000 to 2012, so it says nothing about how today's popular stocks would behave in the next crisis.

Daily trading volume shows why that matters. Extending the illustrative example, say Stock B trades $20 million of shares on a typical day, while Stock A trades $5 billion. If funds sold at a pace of a quarter of each day's volume, the $400 million in Stock B would take about 80 trading days to sell, compared with less than two for the $2 billion in Stock A.

Five questions for any list you find

1. Which quarter does it cover, and when was it published?
2. Which filers did it treat as hedge funds, and how many are there?
3. Does it rank by number of funds, dollars, or share of the company?
4. Did it count option lines as holdings, or shares only?
5. Does it show position size, or only that a fund owns the stock at all?

A list that won't answer the first three questions is difficult to evaluate. To go to the source, you can run the calculation yourself on the SEC data sets with your own roster of funds.

On MarketPlays, a symbol page such as AAPL shows stock data, news, sentiment, and community research (AAPL is only an example of the format, and nothing here ranks it). Explore shows trending stocks and big movers, and browse tags groups symbols by sector and theme.

Key takeaways

• The SEC data sets we read hold filing-level 13F data, so a ranking built on them reflects the choices of whoever built it.
• Number of funds, dollars held, and share of the company can put different stocks on top.
• 13F filings leave out shorts, while Form PF data put hedge funds' short exposure to listed stocks at $1.36 trillion in September 2025.
• Filings are due 45 days after the quarter ends, so a position can be about four and a half months old when you first see it.
• Fed research from a 2000 to 2012 sample found 7% ownership at the typical firm and 17% at the 90th percentile, a rough marker for crowding.

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