Independent data project
InsiderFilings.info
SEC insider filings in context: searchable ownership and transaction data, a daily activity overview, tools for developers, and original empirical research.
What it is
InsiderFilings.info is an independent, free research website built around SEC Forms 3, 4 and 5, including amendments. Online since April 2026, it structures public disclosures from the U.S. Securities and Exchange Commission's EDGAR system into searchable company, reporting-owner, ownership and transaction views, with links back to the original filings.
Why I built it
Insider filings contain more than simple “buy” and “sell” events. They also report grants, option exercises, gifts, tax-related dispositions and other ownership changes. Footnotes can explain trading plans, prices and ownership arrangements that are not apparent from the transaction table. I built the site to make those disclosures easier to explore while keeping their context and sources visible.
From daily activity to individual filings
The daily overview brings together filing activity, reported purchases and sales, active companies, selected purchases and recent filings. Dedicated screens cover large purchases and sales, director purchases and officer purchases. The filing search provides a more targeted starting point for investigating a company or transaction.
Filing pages retain reporting-owner roles, transaction codes, ownership information, footnotes and source links. Purchase and sale codes can cover private transactions as well as market trades; inclusion in a screen does not establish that a transaction was discretionary or predicts future returns.
Data access and developer tools
Alongside CSV exports, RSS feeds and email notifications, the project now offers a public-beta API for normalized transaction data. A free seven-day trial provides a way to explore the API. The interactive API playground helps users build requests, inspect responses and generate code examples; sample data can be explored without a key.
Original research
I also use the database for empirical studies of insider disclosures and data quality. My first working paper, SEC Form 4 Timing: Transaction Dates, Filing Dates and Acceptance Times, examines 487,715 original Form 4 filings with official filing dates from January 2024 through September 2026.
The study distinguishes reported transaction dates, official filing dates and EDGAR acceptance times, and examines the gaps between them. It documents source checks, timestamp corrections and internal validation, including a random sample of 2,000 filings. Acceptance time is treated as a processing timestamp; the study does not measure the first moment a filing became publicly available.
The full working paper and methodology are archived on Zenodo under DOI 10.5281/zenodo.23456982. The online study is accompanied by data and code downloads on InsiderFilings.info.
Methods and data quality
Ongoing work addresses reported prices, currency context, footnote interpretation and timestamp consistency. The site methodology explains processing and display conventions; the Learn guides introduce reporting rules, transaction codes and ownership context. Source agreement and internal validation are documented with their limits.
Who it is for
The project is for investors, researchers, analysts and developers who want to inspect SEC insider disclosures and work with structured filing data. It provides information and research tools, not investment advice. Important information should be checked against the original SEC filing.
Project update: .