Form 4 · filed within 2 days, indexed in minutes
The trades that actuallymove stocks.
Every Form 4 the SEC publishes, pulled from EDGAR directly, classified, clustered, ranked. The signal you would have seen if you read every filing the hour it landed.
The window
Insider buying isn't an event. It's an accumulation.
A lone director buying is noise. The signal is density: distinct insiders stacking into the same name inside a tight window. So we don't show you a list. We show you the window filling up, filing by filing, until it trips.
| Day | Filing | Distinct buyers | Annotation |
|---|---|---|---|
| day 1 · no filings | |||
| 2 | Director · $41M | ||
| days 3–4 · no filings | |||
| 5 | Director · $88M | ||
| days 6–8 · no filings | |||
| 9 | Director · $103M | ← 3rd distinct buyer · cluster threshold | |
| day 10 · no filings | |||
| 11 | Director · $80M | ||
| day 12 · no filings | |||
The same window runs across the whole market, continuously.
Straight from the source
EDGAR direct. No aggregator sitting on the clock.
Form 4 is what every officer, director, and 10% holder files within two business days of a trade. We poll EDGAR's stream ourselves, so the window above starts filling the moment a filing posts, not when a reseller gets around to it.
Classified, then weighted
Not every Form 4 is a signal. We sort the ones that are.
Classification
Every filing tagged by transaction code: open-market buy, planned 10b5-1 sale, option exercise, gift. Mechanical and pre-scheduled sales are filtered out before anything reaches the window.
- P open-market buy
- S open-market sale
- A grant / award
- M option exercise
- G gift
Role weighting
A CEO buying their own stock is a louder signal than a 10% holder rebalancing. Each filer's role tunes how heavily their buy counts toward the window's conviction.
- CEO buy
- CFO buy
- Director
- 10% holder
The payoff
One filing is a data point. The window turns it into a call.
Everything above resolves to one ranked row. The cluster that formed in the window, scored on role, dollar size, deviation from each insider's prior pattern, and proximity to earnings; top decile flagged.
In isolation: indistinguishable from routine. Easy to miss, easy to dismiss.
Where it lives
On every surface that needs it.
- Dashboard feedclusters land inline the moment the window trips; filings one click away
- /stock/<ticker>90-day Form 4 history with filer, role, code, and the EDGAR link
- Insider Flow tabopen windows this week, biggest trades, most-bought – sliceable
- Smart alertspinged when a window trips on your watchlist or a CEO buys their own stock
Stop reading EDGAR by hand.
Get the clusters the moment the window trips, scored and cited.