Jim Simons' Portfolio Update: Renaissance Technologies LLC Holdings Shift in 2025

Renaissance Technologies LLC, managed by investor Jim Simons, reported a portfolio value of $62.9 billion as of December 31, 2025. The analysis focuses on changes in top holdings during the period.

Jim Simons' Renaissance Technologies LLC increased its stake in Micron Technology (MU) by 151% during the period, adding over 1.8 million shares. The position now accounts for 1.33% of the total portfolio value.

The investment manager also significantly boosted its position in Netflix (NFLX), increasing holdings by 2544% through the period. This stock allocation now stands at 1.04% of the portfolio.

In contrast, holdings in Tesla (TSLA) and Palantir (PLTR) saw substantial increases, rising by 220.88% and 2.7% respectively, adding 0.95% and 2.43% allocation.

Meanwhile, United Therapeutics (UTHR) experienced a notable reduction, with a 12.15% decrease in shares, now holding 1.44% of the portfolio. Similarly, KGC saw a 4.24% reduction in holdings.

Other significant changes included a 12.33% reduction in Verisign (VRSN), a 10.0% decrease in Exelixis (EXEL), and increases in Costco (COST) and Carvana (CVNA).

For detailed analysis of each holding, please visit the investor profile here and individual stock pages here.