Marshall Wace LLP

Marshall Wace LLP's latest 13F filing reveals the hallmarks of a sophisticated quantitative operation managing an enormous $98.6 trillion in assets across nearly 6,000 positions. The fund's systematic approach is evident in its extraordinary 99% quarterly turnover rate, suggesting highly algorithmic trading strategies that continuously rebalance positions based on quantitative signals. Despite this hyperactive trading pattern, the fund maintained all existing positions while adding 1,398 new holdings, indicating an expansion rather than rotation strategy during the quarter.

The portfolio construction reflects a blend of broad market exposure and selective equity picks. Marshall Wace's heavy concentration in iShares Core S&P 500 ETF (IVV) positions, which comprise four of the top five holdings totaling over $38 trillion, demonstrates a core-satellite approach where large ETF positions provide market beta while thousands of individual stock positions generate alpha. The fund's $2.9 trillion position in Vanguard S&P 500 ETF (VOO) further reinforces this broad market foundation, representing about 2.6% of total assets.

The individual equity selections show classic quant factor tilts toward large-cap technology names, with Microsoft ($1.5 trillion), Amazon (two separate positions totaling $2.8 trillion), Apple ($1.5 trillion), and Nvidia ($1.4 trillion) among the top holdings. The sector allocation reveals balanced exposure across Technology (9.2%), Retail (8.5%), and Semiconductors (7.8%), while the low 0.021 Herfindahl-Hirschman Index confirms the highly diversified nature typical of systematic strategies. This portfolio structure suggests Marshall Wace is running momentum and factor-based models while maintaining significant market exposure through ETF positions.

Analysis generated Apr 5, 2026