Form 4 insider buying hits EDGAR within two business days, and you can watch it without paying. Six tools. Five are free. The sixth costs money and earns its slot.
- OpenInsider: free screener over every Form 4, filterable by code, title, and size.
- SEC EDGAR: the source itself: free, complete, fastest, if you can stomach the interface.
- Nasdaq insider pages: free per-ticker insider tables for stocks you already follow.
- InsiderScreener: daily email reports of insider activity across markets.
- InsiderPulse (stockspro24.com): 5 free cluster-buy alerts a month plus the full Form 4 feed.
- MarketBeat: the paid entry: its All Access screener filters by insider name and value.
Sources: [OpenInsider](http://openinsider.com/), [MarketBeat screener](https://www.MarketBeat.com/all-access/insider-trades-screener/), [SEC Form 4 guide](https://www.sec.gov/files/forms-3-4-5.pdf)
Free gets you the data. Paid gets you the filters. Start free and upgrade when the inbox proves its worth.