# Guides

How to read what companies file, one form at a time, and how the leagues turn a filing into a score.

- [How to read a 10-K](/guides/how-to-read-a-10-k.md) (6 min read): A practical order for reading a company's annual report: which items to open first, what to look for in each, and which questions to bring.
- [How to read a 10-Q](/guides/how-to-read-a-10-q.md) (5 min read): What is in a quarterly report, how its columns differ from the annual report's, and how to read one quickly against the last 10-K.
- [Reading an 8-K](/guides/reading-an-8-k.md) (5 min read): How current reports work, which item numbers matter most, the difference between filed and furnished, and how to read an earnings release with care.
- [Insider trades: what Form 4 tells you](/guides/insider-trades-what-form-4-tells-you.md) (5 min read): How to read a Form 4 line by line, which transaction codes are decisions and which are paperwork, and what an insider's trade can and cannot tell you.
- [What a 13F shows and what it hides](/guides/what-a-13f-shows-and-what-it-hides.md) (5 min read): Who files 13F reports, what one holding line contains, the many things a 13F leaves out, and how to read a fund's quarter-to-quarter changes without overreading them.
- [How Listed leagues score your calls](/guides/how-listed-leagues-score-your-calls.md) (6 min read): A worked walk through one league target, from the quarter end to the score, with the formula, illustrative examples, the fourth-quarter case and the void rule.