David Siegel

David Siegel’s Two Sigma Investments runs a $138 billion equity book that looks less like a concentrated bet and more like a broad, quant-driven sweep. The top ten positions, led by Western Digital at 1.08% of the portfolio, account for barely 8.5% of total assets. That dispersion is the signature of a systematic process: no single name carries enough weight to move the fund on its own, and the holdings read like a liquid large-cap index with a slight value tilt. The largest stake, Western Digital, is the outlier. No other top holding sits above 1%, and the storage maker is a cyclical, capital-intensive business that most quant funds would treat as a short-term trade rather than a core position. The rest of the list is familiar mega-cap territory: Amazon, Nvidia, Apple, Tesla, and Berkshire Hathaway all cluster between 0.82% and 0.99% of the portfolio. Mastercard, Costco, and ASML round out the top ten, which skews toward consumer staples and payments rather than pure tech momentum. Two Sigma’s recent positioning diverges from peers in its restraint. The fund has not loaded up on Nvidia to the degree many discretionary growth managers have; the chipmaker sits third, not first. Instead, the portfolio spreads risk across sectors and caps, with preferred shares of JPMorgan appearing alongside common stock in Berkshire. That mix suggests a model that prizes diversification and risk-adjusted returns over narrative-driven concentration. For a fund of this size, the story is not any single stock pick, but the absence of a dominant theme.