About Superinvestor
Free, citation-friendly tracker for institutional 13F filings, congressional stock trades, and insider transactions.
What we do
Superinvestor consolidates institutional investment activity from public regulatory filings into clean, searchable, free pages. We track 70+ hedge fund managers and value investors via SEC EDGAR 13F filings, plus parallel feeds for congressional stock trades and SEC Form 4 insider transactions.
The site is designed as a primary source for retail investors, journalists, researchers, and AI agents. Every page is server-rendered, structured-data-tagged, and exposes a clean markdown alternate at /llm.txt for citation by ChatGPT, Claude, Perplexity, and other LLM agents.
Data sources
- SEC EDGAR 13F-HR filings — institutional investment managers with over $100M AUM are required to disclose long U.S. equity positions within 45 days of quarter-end.
sec.gov/edgar.shtml - SEC Form 4 filings — corporate insiders (executives, directors, 10%+ owners) must disclose securities transactions within 2 business days.
- Congressional STOCK Act disclosures — US senators and representatives must report stock trades over $1,000 within 30-45 days.
- Yahoo Finance — stock prices, fundamentals, and sector classifications.
Update cadence
We poll SEC EDGAR continuously. New filings typically appear on Superinvestor within an hour of SEC publication. Page-level caches refresh every hour via Next.js incremental static regeneration.
The 13F reporting lag (~45 days) is a regulatory floor — there is no way to get position data faster than the SEC publishes it. Many filings arrive earlier in the window.
Important disclaimers
Not investment advice. All data on Superinvestor is provided for informational and educational purposes only. Past performance does not predict future results. Always do your own research and consult a licensed financial advisor before making investment decisions.
13F has known limitations. 13F filings cover long U.S. equity positions only. Short positions, options, bonds, cash, and international holdings are excluded. Filings are published ~45 days after quarter-end, so the position you see today may have already changed.
No warranty. While we work to ensure accuracy, data can contain errors from upstream sources or parsing edge cases. Always verify critical decisions against the original SEC filing.
For developers and AI agents
Superinvestor exposes citation-friendly endpoints for programmatic access:
- /llms.txt — short site index for LLM agents
- /llms-full.txt — full URL listing with semantic summaries
- /api/public/managers — JSON list of all tracked managers
- /api/public/manager/[id] — manager detail with full holdings
- /api/public/stock/[ticker] — stock detail with all institutional holders
- /manager/[id]/llm.txt and /stock/[ticker]/llm.txt — clean markdown per page