Clone the stock picks of Buffett, Ackman, Burry, and 8,000+ other hedge fund managers. Combine their disclosed holdings, backtest against the S&P 500, and see how you would have performed — in seconds.
Add funds using the search bar above to begin engineering your custom portfolio.
An equal-weight 13F strategy assigns the same portfolio allocation to every position reported in a fund's SEC 13F filing, regardless of the fund's own weighting. This removes concentration risk from the largest positions and lets you test whether a manager's stock-picking skill is consistent across all holdings — not just their highest-conviction bets.
Yes. The Portfolio Builder lets you add up to 5 funds on the free plan (unlimited on Premium) and merge their disclosed holdings into a single blended portfolio. You can weight funds equally or by manager allocation, then backtest the combined strategy against S&P 500, NASDAQ, and Russell 2000.
13Foresight holds 13F filing data going back to 1998 for funds that have filed continuously. Most institutional managers have data from 2013 onwards. You can backtest any strategy across the full available history for each fund in your portfolio.
The backtester computes CAGR, Sharpe ratio, Sortino ratio, maximum drawdown, alpha (Jensen's), beta, up/down capture, batting average, and correlation matrix between selected funds. All metrics account for the 45-day SEC filing lag so results reflect realistic entry timing.