Form 4 is an SEC filing in which a company's insiders — directors, officers, and 10%+ owners — report changes in their holdings of the company's stock, due within two business days of the transaction.
Form 4 reports a change in beneficial ownership: an open-market buy or sell, an option exercise, a grant, or a tax-withholding disposition. It must be filed within two business days of the transaction, which makes it the freshest insider signal in the EDGAR universe — far timelier than the quarterly 13F.
Traders weight Form 4 by transaction code. Open-market purchases (code P) and sales (code S) are the discretionary, tradeable signal; awards, option exercises, and 10b5-1 plan sales carry far less information. A cluster of distinct insiders buying on the open market is a classic conviction tell.
A CFO buying $500k of her own company's shares files a Form 4 within two business days, coded P (open-market purchase) — visible on EDGAR almost immediately.
Arkolith ingests Form 4 within minutes of acceptance and normalizes the buy/sell signal, powering the live insider stream and per-ticker pages.
Arkolith turns this into live, sourced data your agent can query — SEC filings, insider activity, and market data behind one key, every datapoint traceable to its origin.