About DataHeimdall
Financial transparency, made accessible.
What We Do
DataHeimdall tracks and displays two categories of financial disclosure data:
- SEC Form 4 filings — required disclosures by corporate insiders (executives, directors, and major shareholders) when they buy or sell stock in their own company.
- Congressional disclosures — stock trades made by U.S. senators and representatives, required under the STOCK Act (Stop Trading on Congressional Knowledge Act).
We aggregate this publicly available data, organize it into a searchable interface, and surface patterns that would otherwise require hours of manual research.
Why We Built This
Corporate insiders and elected officials are required by law to publicly disclose their stock trades — but that data is scattered across government databases in formats that are difficult to search, cross-reference, or understand at a glance.
DataHeimdall exists to make this public information genuinely accessible. We believe financial transparency supports better-informed citizens and markets. Anyone should be able to see, quickly and clearly, what the people running public companies and writing public policy are doing with their own money.
Data Sources
SEC EDGAR
Form 4 filings are sourced directly from the U.S. Securities and Exchange Commission's public EDGAR database. Data is fetched daily and reflects official filings as submitted.
STOCK Act Disclosures
Congressional trade disclosures are sourced from public disclosure databases. Data availability depends on timely filing by elected officials as required by law.
Update Frequency
Our data pipeline runs daily at 08:00 UTC. New insider trade filings typically appear within 24–48 hours of being submitted to the SEC (Form 4 filings are required within 2 business days of the transaction).
Technology
Next.js
Frontend
Supabase
Database
Python
Data pipeline
SEC EDGAR
Primary data source
Vercel
Hosting
GitHub Actions
Scheduling
Important Note
DataHeimdall displays public information for transparency purposes only. This is not financial advice. See our Disclaimer and Terms of Service.
Contact
Questions, feedback, or data corrections: hello@dataheimdall.com