13F holdings tracker
A 13F tells you what a manager held at a quarter end, up to 45 days after the fact. That is genuinely useful for funds whose positions are real decisions, and nearly meaningless for index funds that hold everything by mandate — so Finisdom tracks only the concentrated, actively-managed books, and says plainly what the filing can and cannot tell you.
What it does
- Ten concentrated active managers — Berkshire, Pershing Square, Baupost, Appaloosa, Tiger Global and more
- Index giants excluded on purpose: they hold everything by mandate, so it carries no decision
- Quarter-over-quarter changes — new positions, full exits, adds and trims
- Overlap with your own holdings, scoped privately to you
- Parsed straight from the SEC filing XML — there is no 13F JSON API
- States the 45-day legal lag and the long-US-equity-only limit on every read
How it works
Read the changes, not the snapshot
A list of what someone holds is nearly inert. What carries information is what changed — a new stake or a full exit is a decision, and those lead each card.
Check your own overlap
Where a tracked manager holds something you hold, you see who, how much, and what they last did with it. It appears only when there is a genuine overlap.
Weigh the staleness
Every card shows the quarter it describes and the date it was actually filed. The gap between them — up to 45 days — is how stale the picture is, by law.
Frequently asked
What is a 13F filing?
A quarterly disclosure that institutional managers overseeing at least $100 million in US-listed equity must file with the SEC, listing their long positions as of the quarter end. It is due within 45 days of that date.
Why exclude BlackRock and Vanguard?
Because they hold essentially every listed company by mandate. "BlackRock holds this stock" tells you about BlackRock’s index products, not about the stock. Only managers whose positions represent actual decisions are tracked, so the moves you see are legible.
How current is the data?
It is what a manager held on the quarter-end date, filed up to 45 days later. They may have sold the entire position before you read it. This is what whales held last quarter — never what they are doing now.
Does it show short positions?
No, and neither does any 13F. Only long US-listed equity is reported — shorts, options, bonds, cash and non-US holdings are all invisible. A long shown here can be one leg of a hedge whose other side you cannot see.
Does it tell me how crowded a stock is?
Deliberately not. Ten hand-picked managers is far too small and too selected a sample to score crowding from; the number would look precise and mean nothing. The page reports who holds a name, not how crowded it is.
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