About InvestorLens

What it is

InvestorLens is an educational research tool. It uses AI to interpret SEC EDGAR 13F filings and turn them into something you can browse, compare, and study. We track a curated set of well-known portfolio managers — Warren Buffett, Michael Burry, Bill Ackman, Cathie Wood, Ray Dalio, Stanley Druckenmiller, David Tepper, Carl Icahn, Ken Griffin, and Seth Klarman — and present their reported U.S. equity positions, quarter-over-quarter changes, overlap across managers, and plain-English summaries of each disclosure.

How it works

Every six hours an automated pipeline checks SEC EDGAR for new 13F filings, parses the information-table XML, and stores the holdings in our database. A comparison engine identifies new positions, increases, reductions, and full exits relative to the prior quarter. An AI layer generates plain-English summaries, identifies stocks that appear across multiple tracked investors, and produces the educational “Why This Matters” notes you see throughout the site.

What it isn't

InvestorLens is not a brokerage, investment advisor, robo-advisor, copy-trading service, or signal provider. We do not place trades, hold customer funds, give personalized advice, or recommend that anyone buy or sell any security. 13F filings are delayed by up to 45 days, so what you see here is historical information — useful for educational research, not for real-time investment decisions. AI summaries are produced by automated language models and may contain inaccuracies. Read the full disclaimer and terms of service.

Data sources

All holdings data is sourced from public filings on SEC EDGAR. We are not affiliated with, endorsed by, or sponsored by any of the firms or individuals listed.