About InvestorLens
A research tool for tracking what famous investors do — built on public regulatory filings.
What it is
InvestorLens turns SEC EDGAR 13F filings into something you can browse, compare, and learn from. 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 show their reported U.S. equity positions, quarter-over-quarter changes, and aggregate trends.
How it works
Every few hours a scheduled job checks SEC EDGAR for new 13F filings from the investors we track, parses the information table, and stores the holdings in our database. The comparison engine then computes new positions, increased and reduced stakes, and full exits relative to the prior quarter — and a plain-English summary is generated to make the changes easy to read.
What it isn't
InvestorLens is not a brokerage, robo-advisor, or copy-trading service. We do not place trades, give personalized advice, or recommend that you buy or sell any security. 13F filings are delayed by up to 45 days, so what you see here is historical information — useful for research, not for real-time decisions. Read the full disclaimer.
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.