What is SEC Form 4?
SEC Form 4 is the disclosure insiders must file whenever they buy or sell shares in a company they control. It is public, mandatory, and typically available within two business days of the trade.
Why investors care
Form 4 reveals when executives, directors, and large shareholders trade equity. These filings can signal confidence, risk management, or portfolio rebalancing.
When multiple insiders trade the same stock within a narrow window, that pattern can be more meaningful than an isolated filing.
How ClusterSignal uses Form 4
ClusterSignal scans EDGAR filings to find insider clusters, then grades them by participation, capital deployed, seniority, and filing speed. The goal is to help investors spot high-conviction activity quickly.