About InsiderSource

InsiderSource makes SEC insider-trading and institutional-holdings data fast, readable, and free. We pull directly from the SEC's EDGAR system — the official source — and present it without paywalls or logins.

What is a Form 4?

A Form 4 is a Statement of Changes in Beneficial Ownership. Whenever a corporate insider — an officer, director, or beneficial owner of more than 10% of a company's equity — buys or sells shares, they must report it to the SEC on Form 4 within two business days. Because of that tight deadline, Form 4 data is one of the most timely signals available about how the people closest to a business view its stock.

Each Form 4 identifies the insider, their relationship to the company, and the specific transactions: how many shares, at what price, and whether they acquired or disposed of stock. We parse all of this and present it in a single readable feed.

What is a 13F?

A Form 13F is a quarterly holdings report. Institutional investment managers — hedge funds, pensions, banks, and others — who manage at least $100 million in qualifying U.S. equities must disclose their long positions each quarter. 13F filings reveal what large, sophisticated investors are holding, though they arrive up to 45 days after quarter-end and exclude short positions, cash, and most non-U.S. assets.

Insider transaction codes

The SEC uses single-letter codes to classify each transaction on a Form 4. The most important ones to know:

On InsiderSource, we highlight P (buy) and S (sell) transactions because they reflect deliberate open-market decisions. Other codes are shown but de-emphasized.

Where our data comes from

Everything on this site is sourced from SEC EDGAR, the U.S. government's electronic filing system. We read Form 4 and 13F filings directly, parse the underlying XML, and cache results briefly to stay within the SEC's fair-access guidelines. We add nothing to the filings themselves — we just make them faster to read and easier to navigate.

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