SEC Insider Trading & Form 4 Filings

InsiderFilings.info is a free research platform for SEC ownership filings, covering Forms 3, 4 and 5. Most insider-trading websites reduce a filing to a simple headline such as “insider bought” or “insider sold.” But the underlying SEC filing often tells a much more complicated story. A reported sale may be related to RSU vesting, taxes, an option exercise or a pre-arranged trading plan rather than a discretionary decision to sell shares. InsiderFilings.info is built to make that context easier to understand. Users can explore recent insider filings, open-market purchases and sales, large transactions, director and officer activity, individual filing histories and ownership changes. Each transaction remains connected to the underlying SEC filing so the original source can always be reviewed. A major focus is the information buried inside Form 4 filings. The platform parses filing footnotes and transaction details to help distinguish genuine open-market activity from compensation-related or administrative transactions such as RSU vesting, tax-related sales and option exercises. Key features include: • SEC Forms 3, 4 and 5 • Open-market purchase and sale screens • Large insider transactions • Director and officer transaction views • Filing and transaction histories by ticker • Ownership changes after transactions • Form 4 footnotes and filing context • Links back to the original SEC filing • Data-quality checks for reported transaction prices • Searchable and structured insider-filing data The project started as a simple insider-trading database but has developed into a broader effort to turn raw SEC ownership filings into cleaner, more searchable and more interpretable data. InsiderFilings.info is free to use and does not require an account for normal research. A structured API is also in development for users who want programmatic access to the underlying data.