What is a 13F filing?

Form 13F is a quarterly report that US investment managers with more than $100 million in US-listed stocks file with the SEC. It lists what the manager held on the last day of the quarter. It is the public record the Superinvestors page is built from.

How late are 13F filings?

A manager has up to 45 days after the quarter ends to file, so what you see describes the portfolio as it stood on the quarter's last day and is always a little out of date. A quarter is shown once that deadline has passed, and read once more a month later for late filers.

Does a 13F show everything an investor owns?

No. It lists long positions in US-listed stocks and funds. It does not show short positions, cash, bonds or most foreign shares, and options are shown separately. It also says nothing about why a position was held, or how it has done since the quarter ended.

Which investors are included?

50 well-known investors, such as Warren Buffett, Bill Ackman, Seth Klarman and others, each checked against the SEC's own record of the filer. It is a selection, not every manager who files a 13F.

Do I need an account to use it?

Yes, Superinvestors is for members. Signing up is free and starts a 7-day trial with no card needed; after that it is $20 a month or $200 a year. Without an account the page shows a sign-up prompt.

Stock Meadow · Superinvestors

Superinvestor portfolios: see what well-known investors own, from their 13F filings

Superinvestors gathers the 13F filings of 50 well-known investors, such as Warren Buffett, Bill Ackman and Seth Klarman, so you can see each portfolio, what changed since the quarter before, and which stocks several of them hold.

What a 13F filing shows

Large US investment managers must report their stock holdings to the SEC every quarter on Form 13F. The filing is public, so anyone can see what a well-known investor held, though not what they hold today.

What a 13F does and does not show
Topic	What to know
Who files	Managers with more than $100 million in US-listed stocks
What is listed	Long positions in US-listed stocks and funds, with the number of shares and their value on the quarter's last day
What is not	Short positions, cash, bonds and most foreign shares; options are shown separately
When	Up to 45 days after the quarter ends, so every filing is a little out of date
Why	A 13F says nothing about why a position was held or how it has done since

Swipe sideways to see every column.

What you can see and do

Investors we follow: a card for each of the 50 investors with the reported value, number of positions, largest holdings and filing date. Sort by portfolio size, latest filing or name.
This quarter across superinvestors: the stocks held by the most investors, the ones the most of them started or added shares of, and the ones the most of them reduced or sold out of.
One investor's portfolio: every holding with its share of the portfolio, the new positions, additions, reductions and exits since the quarter before, and 5 years (20 quarters) of history.
On every stock: the Institutions tab shows which of these investors own the stock, next to all institutional holders, the largest buyers and sellers of the quarter and ownership over time.

Superinvestors in pictures

Real screens from the app, in the app's light and dark themes.

The Superinvestors page: a note on what a 13F filing shows, then the stocks held by the most well-known investors this quarter, the ones most of them added to and the ones most of them reduced or sold out of. — The Superinvestors page: what a 13F shows, then the stocks held by the most investors, added to by the most and reduced by the most.

A stock's Institutions tab: the share of the company held by institutions, how many hold it, how many started, added to, cut or closed a position, and charts of ownership and holders quarter by quarter. — A stock's Institutions tab: how much of the company institutions hold, how many hold it, and how that changed quarter by quarter.

How often it updates, and how far back it goes

The portfolios are updated with the rest of Stock Meadow's data after each filing deadline, and every page names the quarter it shows. History runs back 5 years. Because managers file up to 45 days after a quarter ends, the newest quarter appears only after that deadline has passed.

What Superinvestors leaves out

Everything except long US positions. Short positions, cash, bonds and most foreign shares are not in a 13F.
Today's portfolio. A filing describes the last day of a quarter, up to 45 days before it is public.
Every manager. The list is a selection of well-known investors, not all 13F filers.
Reasons and results. A holding does not say why it was held or how it turned out.

Superinvestors is a research tool. It is not part of any score or filter, and Stock Meadow does not suggest copying anyone's portfolio. For research only, not investment advice.

Who can use it

Superinvestors is for members. Sign up free for a 7-day trial with no card, then $20 a month or $200 a year (see pricing). It sits beside the Stock Meadow scoring models, so you can score and rank stocks, then check which well-known investors report owning them.

Frequently asked questions

What is a 13F filing?: Form 13F is a quarterly report that US investment managers with more than $100 million in US-listed stocks file with the SEC. It lists what the manager held on the last day of the quarter. It is the public record the Superinvestors page is built from.
How late are 13F filings?: A manager has up to 45 days after the quarter ends to file, so what you see describes the portfolio as it stood on the quarter's last day and is always a little out of date. A quarter is shown once that deadline has passed, and read once more a month later for late filers.
Does a 13F show everything an investor owns?: No. It lists long positions in US-listed stocks and funds. It does not show short positions, cash, bonds or most foreign shares, and options are shown separately. It also says nothing about why a position was held, or how it has done since the quarter ended.
Which investors are included?: 50 well-known investors, such as Warren Buffett, Bill Ackman, Seth Klarman and others, each checked against the SEC's own record of the filer. It is a selection, not every manager who files a 13F.
Do I need an account to use it?: Yes, Superinvestors is for members. Signing up is free and starts a 7-day trial with no card needed; after that it is $20 a month or $200 a year. Without an account the page shows a sign-up prompt.

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