Several Companies Experience Changes in Benchmark Index Membership

A number of companies underwent changes in their membership in various benchmark indexes, such as the Russell 2000 Value Benchmark, Russell 2500 Growth Benchmark, and others, during the 29th of June, 2026. New additions include Apple Inc., American International Group, Inc., Amazon was not included but several other companies are added. Meanwhile, some companies like Jabil Inc. were dropped from some of these indexes.

A wave of benchmark-index membership changes took effect on June 29 as index providers reconstituted Russell and related benchmarks, reshuffling additions and deletions across value, growth, and midcap tiers. Names cited as additions include AAPL to the Russell 1000 Value benchmark and American International Group to the Russell Midcap Value benchmark, while companies such as Jabil and Quanta Services were dropped from certain indexes.

Index reconstitution is a recurring but genuinely market-relevant event because passive funds tracking these benchmarks must mechanically buy additions and sell deletions, concentrating trading volume and short-term price pressure around the effective date. Style reclassifications, such as a stock shifting between value and growth buckets, can quietly redirect billions in index-fund flows.

For investors, the actionable angle is flow-driven rather than fundamental: additions often see temporary demand and deletions temporary supply, with effects typically normalizing after the rebalance settles. The watch items are elevated volume in the named constituents and any style-bucket migrations that alter which funds must hold a given stock.