Plain-English guides to SEC insider transaction reporting. Each article links into the live InsiderAlpha database so you can apply what you learn to current filings.
SEC Form 4 is filed within 2 business days when corporate insiders — directors, officers, and 10% owners — buy or sell company stock. Learn how to read Form 4 filings, what the transaction codes mean, and why insider buying is a signal.
Not all insider buys are equal. Learn which Form 4 purchases matter most: officer buys vs 10% owner buys, cluster buying, purchase size relative to compensation, and how to filter Rule 10b5-1 plan trades from opportunistic conviction buys.
Rule 10b5-1 lets corporate insiders pre-schedule stock trades in advance, providing a legal defense against insider-trading claims. Learn why these trades carry less information than opportunistic purchases and how to identify them on Form 4.
Cluster buying — multiple insiders purchasing the same stock within a short window — is one of the most predictive signals in the SEC Form 4 dataset. Learn what defines a cluster, the academic evidence, and how InsiderAlpha scores it.