How to Read a 13F Filing on SEC EDGAR (Step by Step)
Every institution managing over $100 million files a 13F with the SEC each quarter. The data is free on EDGAR. It is also, frankly, hostile to read. Here is the process, and the traps.
The most crowded holdings among 105 funds
Counted from the 13F filings themselves. Microsoft is held by more of the funds we track than any other company, which is exactly what makes it a crowded trade rather than a clever one.
Source: SteadyShares analysis of 107,302 SEC 13F holdings, Q1 2026
Step by step
1. Go to the SEC's EDGAR full-text search and search the fund's name, or better, its CIK number (Berkshire's is 1067983).
2. Filter the filing type to 13F-HR. Ignore 13F-NT: that is a notice saying the holdings are reported elsewhere.
3. Open the filing and find the information table. That is the holdings list.
4. Each row gives an issuer name, a CUSIP, a value, and a share count. Note what is missing: there is no ticker symbol. You must map the CUSIP yourself.
The four traps
- No tickers. CUSIP to ticker mapping is the single biggest obstacle to doing this by hand.
- Options are in there. A row with a put or call flag is a derivative position, not share ownership. Counting them as ownership overstates a fund's stake, sometimes wildly.
- Values are supposed to be dollars, but a handful of funds still file in thousands, against the spec. Left unhandled, a $5.28 billion book reads as $5.28 million.
- Empty filings can poison a comparison. A fund with nothing reportable can file a placeholder row. Treat it as the latest quarter and you will blank the fund's real book.
Every one of these traps is something we hit and fixed while building SteadyShares's 13F pipeline. They are not theoretical.
The shortcut
Or skip all of it: [SteadyShares](/app/gurus) parses 100+ funds' filings into readable portfolios with tickers, weights and quarter-over-quarter changes, free. The raw filing is always one click away if you want to check our work.
Educational information, not financial advice.
The bottom line
The filings are free and public. They are also raw XML with no ticker symbols. Here is how to actually read one, and the traps that fool people.
We publish the underlying analysis, with the method and the limitations printed next to it, in our 13F research. If you want the theory first, start with what a 13F cannot tell you.
This is educational information, not financial advice.
Keep exploring: browse the stocks we cover or see what the smart money holds.