13F Guides: Learn to Read Superinvestor Filings

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These guides explain how SEC Form 13F works so you can read superinvestor holdings correctly — what the filings show, what they leave out and how fresh the data really is. Each guide cites the official SEC source.

Start with the basics

BasicsWhat is Form 13F?Who must file, what it lists and when it becomes public. BasicsHow to read a 13F filingA 5-step checklist and the 5 classic misreadings. LimitsWhat 13F filings don’t showShorts, cash, foreign shares, timing, prices and confidential positions.

Go further

Compare13F vs. 13D, 13G and Form 4Which filing is faster and what each one reveals. How-toFind 13F filings on SEC EDGARSearch any manager’s filings for free in five steps. RisksShould you copy a 13F portfolio?Six risks to weigh before following a fund. BackgroundWhat is a superinvestor?Where the term comes from and how we choose managers. Calendar13F filing deadlines 2026–2028Official SEC dates and what happens each season.

Quick answers

Looking for a one-line answer? The 13F FAQ covers 20 common questions, from “Do 13Fs show short positions?” to “How delayed is 13F data?”.

Then explore the data

Superinvestors we track Stocks they own

How we research and update these guides: methodology and editorial policy.