Jim Simons Portfolio Concentration: Analysis of Holdings as of December 2025

As of December 31, 2025, Jim Simons' portfolio at Renaissance Technologies LLC showed significant concentration in specific sectors and individual stocks. The analysis of his holdings reveals a focus on large-cap technology and healthcare stocks, with notable changes in share positions from the previous period.

Simons' portfolio, valued at approximately $62.9 billion, is dominated by a few key holdings. Palantir Technologies (PLTR) stands out as the largest position, accounting for 2.43% of the portfolio with a total stock value of $1.56 billion. This is followed by Netflix (NFLX) at 1.04% and United Therapeutics (UTHR) at 1.44%, both in the billions.

Investors tracking Renaissance Technologies' activities can find detailed information about Jim Simons' investment approach and holdings by visiting his profile page on Insiderset: https://www.insiderset.com/investor/jim-simons-renaissance-technologies-llc.

The data shows substantial changes in share positions for several holdings. For instance, Netflix saw an extraordinary increase of 2,544.63% in shares held, making it one of the most significant additions to the portfolio during the period. Similarly, Micron Technology (MU) and Tesla (TSLA) experienced substantial increases of 151.03% and 220.88% respectively, indicating strong confidence in these technology and consumer cyclical stocks.

Conversely, some holdings showed reductions. United Therapeutics experienced a 12.15% decrease in shares, while Kinross Gold (KGC) saw a 4.24% reduction. These changes reflect the dynamic nature of Simons' portfolio management.

Simons' portfolio spans multiple sectors, including Technology, Healthcare, Basic Materials, and Consumer Cyclical. The Technology sector is particularly prominent, with holdings in PLTR, MU, VRSN, and NFLX. Healthcare is represented by UTHR and EXEL, while Basic Materials includes KGC, and Consumer Cyclical includes NFLX and CVNA.

For detailed insights into each stock held by Jim Simons, investors can explore the individual stock profiles on Insiderset. For example, Palantir Technologies' profile can be accessed here: https://www.insiderset.com/investors/stocks/PLTR. Similarly, detailed information about Netflix (NFLX) is available at https://www.insiderset.com/investors/stocks/NFLX.

The concentration in specific sectors and individual stocks underscores the distinctive nature of Renaissance Technologies' investment strategy, focused on capturing alpha through quantitative models and selective equity positions.