Pick an insider. See every open-market buy they have filed, plotted against the share price on the day the market learned about it, with the return over the next 63 trading days beside each one. 447 insiders qualify — everyone with at least five purchases — ranked by the median excess return that followed them.
A qualifying buy is a Form 4 open-market purchase, transaction code P. Grants, option exercises, gifts and dispositions are excluded. The excess return is the stock's total return over the 63 trading days after the filing date, minus SPY over the same window, so an insider who only ever bought in 2020 is not credited for the market carrying them. Tickers whose price history contains unadjusted split artifacts are dropped rather than left to produce impossible numbers.
The Atlas is drawn from 5,228 filers and 122,816 open-market buys since 2019. It is a multi-year track record, so it rebuilds on the quarterly cycle rather than daily.
The tables answer questions you already know how to ask. The Atlas is for the ones you don't — the shape of a person's filing history, whether their purchases cluster around lows or highs, how a whole board behaved in the same quarter. Split-adjusted closes on a log axis keep a decade of price history readable on one screen.
It is a way of looking at what has already happened, not a screener that tells you what to buy and not a track record you should trade on. A handful of trades in one ticker can look brilliant by chance; the Atlas shows the dispersion and the tickers so you can see when that is what you are looking at.
Every Wednesday the blog profiles one insider from the Atlas, free.
All seven tools, the full two-year feed, the JSON API and email alerts, refreshed every morning. A free quarterly sample of the dataset needs no account.
See plansFree sampleA ranking of 447 insiders — everyone with at least five qualifying open-market purchases since 2019 — by the median market-adjusted return over the 63 trading days after each purchase, with every buy plotted on the price chart.
The stock's total return over the 63 trading days after the filing date, minus SPY's return over the same days.
Because the filing date is the day the market could know. An insider often trades days before the Form 4 is public; measuring from the trade date would credit information nobody outside had.
The Atlas page ranks them live. The blog's Wednesday spotlight profiles one insider from the top of the list each week.
It is not designed for that and nothing on the site is investment advice. Past filing activity by any insider says nothing reliable about future prices.