Each year, FTSE Russell recalibrates its U.S. indexes to ensure they accurately represent the evolving market. The Russell 1000 Index, comprising the largest 1,000 U.S. companies by market cap, saw some notable additions and exclusions in 2025.
Reconstitution: The Russell Index reconstitution ranks among the busiest trading days of the year, as asset managers rebalance portfolios to align with the updated index components.
