Russell US Index Series

Capture the complete US equity universe

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.

Treemap chart illustrating the hierarchy of Russell US Indexes by market capitalisation as at the date of the Russell Reconstitution in June 2025. The largest block is the Russell 3000® Index, representing 3,000 US stocks and about 98% of US equity market cap, with a largest constituent of $2,893.6B. Other indexes shown include Russell 1000® (95% of Russell 3000®), Russell Top 200® (74%), Russell Top 500® (89%), Russell Top 50® Mega Cap (51%), Russell Midcap® (21%), Russell 2500™ (11%), Russell 2000® (5%), and Russell Microcap® (<1%). Market cap ranges from $3,192.2B for the largest to $30.3M for the smallest.

Source: FTSE Russell. Data as of April 30, 2025. Russell Index constituents represent the preliminary reconstitution constituents as of rank day, April 30, 2025, which will be effective after market close on June 27, 2025. May not equal 100% due to rounding. The market capitalization breakpoints for the Russell Indexes are based on new additions as of 2025 reconstitution. The market capitalization ranges used above are absolute breakpoints for new members and do not include capitalization banding. Capitalization banding involves the implementation of a ±2.5% band around certain breakpoints. For further information, please refer to the Russell US Indexes construction and methodology document or contact FTSE Russell Client Service.

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.

Objective

Defined by the market, not a committee

Modular

The Indexes can be combined as building blocks within a portfolio with no gaps or overlaps.

Reliable

Annual reconstitution of the indexes ensures they stay accurate and relevant. Our disciplined maintenance process makes sure they stay up to date.

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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