Institutional disclosures, retail clarity
How would following a fund perform?
Simulate copy-trading delayed 13F holdings versus the S&P 500. Rebalance only when new filings drop — the same information advantage (and lag) everyone gets.
Sample: Berkshire vs SPY
Thin sim from cached DB prices · $10,000 start
Strategy
SPY
Realistic delay
Positions are bought on the filing date, not the report period — matching how delayed the public signal really is.
Quarterly rebalance
Weights adapt as managers add, trim, and exit — not a naïve sell-all / buy-all each quarter.
Benchmark alpha
Every run charts strategy value against buy-and-hold SPY so you see relative performance at a glance.
Managers on file
Browse all filings →BAUPOST GROUP LLC/MA
CIK 1061768BERKSHIRE HATHAWAY INC
CIK 1067983Bridgewater Associates, LP
CIK 1350694COATUE MANAGEMENT LLC
CIK 1135730GREENLIGHT CAPITAL INC
CIK 1079114MILLENNIUM MANAGEMENT LLC
CIK 1273087Pershing Square Capital Management, L.P.
CIK 1336528Point72 Asset Management, L.P.
CIK 1603466RENAISSANCE TECHNOLOGIES LLC
CIK 1037389SOROS FUND MANAGEMENT LLC
CIK 1029160Situational Awareness LP
CIK 2045724TIGER GLOBAL MANAGEMENT LLC
CIK 1167483