Discover the Russell Difference
It is a common misperception that two indexes covering the same market segment must be, essentially, interchangeable. But a better constructed index can help you to capture your investment requirements with greater precision with earlier access to fast-growing stocks. How an index is constructed and maintained may sound theoretical – but the potential impact on performance is real.
Discover the difference
The Russell US Index Series index is designed to be different from its competitors. Its blueprint – how it is built and how it is governed – is what sets it apart from its competition. Its distinctiveness filters down to the stocks that are included and when they are included.
The Russell index methodology doesn’t try to time the market or allow committees to dictate when new stocks are added. The Russell methodology is rules-based and transparent, allowing asset managers and investment consultants to be confident they are precisely tracking their intended market.
Russell US Indexes – June 2026 Reconstitution” mapping the US equity universe by market capitalisation. It shows the Russell 3000E covering up to 4,000 stocks and the Russell 3000 covering approximately 98% of the US equity market (largest $4.85 trillion to smallest ~$146 million). The chart breaks the market into large-cap (Russell 1000 and Top 200/100/50 subsets), mid-cap, small-cap (Russell 2000), and microcap segments, with additional overlays such as “ex Top 10” and “ex Top 50” indices. Percentages in parentheses indicate each segment’s share of the Russell 3000 index.
Features & benefits
Building a better benchmarks for US equities
By relying on the three guiding principles of objectivity, modularity and reliability, the Russell Indexes remain the institutional investors' preferred benchmark for large US companies.
Defined by the market, not a committee
The Indexes can be combined as building blocks within a portfolio with no gaps or overlaps.
Annual reconstitution of the indexes ensures they stay accurate and relevant. Our disciplined maintenance process makes sure they stay up to date.
Featured solutions
Russell US Indexes - Your Index Matters
The index you choose makes a difference: Russell indexes are rigorously constructed, offer comprehensive coverage, and a transparent methodology.
To learn more about the Russell suite of indexes along with how they can provide robust market coverage and precise asset class representation.
Research and Insights
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