Russell Index Rebalancing Brings Fresh Opportunities to Small and Mid-Cap Investors

The annual Russell Index reconstitution, which took effect after market close on Friday, June 27, 2025, marked a significant milestone in the small and mid-cap investment landscape. This 37th annual reconstitution represents the final annual rebalancing before FTSE Russell transitions to a semi-annual schedule, making it particularly noteworthy for investors focused on emerging growth companies.

Historically, Russell Reconstitution Day represents the biggest trading close of the year, with last year’s event generating $220 billion in U.S. equity trading volume. This year’s rebalancing has brought several compelling additions to the Russell indexes, particularly in the biotechnology and technology sectors, offering new opportunities for investors seeking exposure to innovative small and mid-cap companies.

Notable New Additions to Watch

Among the most intriguing additions to the Russell indexes this year are several companies that exemplify the dynamic nature of today’s small-cap market. Tonix Pharmaceuticals (TNXP) announced its inclusion in both the broad-market Russell 3000 Index and the small-cap Russell 2000 Index, representing a significant validation of the fully-integrated biotechnology company’s market position and growth trajectory.

Tonix’s addition is particularly noteworthy given the company’s focus on developing treatments across multiple therapeutic areas. The inclusion in these widely-followed indexes is expected to increase institutional investor attention and potentially improve liquidity for the stock, making it more accessible to a broader range of portfolio managers and ETF providers.

Eledon Pharmaceuticals (ELDN) represents another compelling story in the clinical-stage biopharmaceutical space. The company focuses on developing immune-modulating therapies for life-threatening conditions, positioning it at the forefront of innovative medical treatment development. With analyst price targets averaging $10.40 and ranging from $8.00 to $16.00, representing a potential 230% upside from recent trading levels, the stock demonstrates the significant growth potential that Russell Index inclusion can help unlock.

Comstock (LODE) and SKYX Platforms (SKYX) round out a diverse group of new additions that span multiple sectors, from natural resources to technology platforms. These companies represent the type of emerging businesses that the Russell reconstitution process is designed to capture, ensuring that the indexes remain representative of the evolving U.S. equity market landscape.

The Russell reconstitution process serves as a crucial barometer for middle market health and provides institutional validation for growing companies. The process realigns membership across the Russell 1000, Russell 2000, Russell 3000, and Russell Microcap indexes to reflect changes in market capitalization and structure, ensuring these benchmarks accurately represent the current market environment.

For investors focused on small and mid-cap opportunities, these new additions represent companies that have demonstrated sufficient growth, liquidity, and market acceptance to meet Russell’s stringent inclusion criteria. The reconstitution process, which began on April 30 and culminated with the June 27 implementation, involves comprehensive evaluation of company fundamentals and market positioning.

As the Russell indexes transition to semi-annual reconstitution in the future, this year’s additions take on added significance, representing the final cohort selected through the traditional annual process that has guided small-cap investing for decades.

To learn more about emerging opportunities in the small and mid-cap market, join us at Noble Capital Markets’ upcoming Virtual Equity Conference on October 8-9, where we’ll feature presentations from promising growth companies and insights from leading market experts.

The Russell Reconstitution 2025 Preliminary List

The preliminary list of stocks to be included in the Russell Reconstitution, and also which Russell Index, is a huge day for many stock investors and the impacted companies as well. This year, it occurs on Friday, May 23. The list, although preliminary and subject to refinements each Friday through June, includes the stocks that are believed to meet the requirements based on valuations taken on April 30. This is the first official file from the popular index provider, in addition to informing the investor public what to expect when the indexes are reconstituted. The reconstitution can be expected to impact prices as index fund managers readjust holdings. The event also, for many, redefines market-cap levels that are considered small-cap, mid-cap, and large-cap.

Background

The Russell Reconstitution is an annual event that reconfigures the membership of the Russell indexes by defining the top 3000 stocks based on market-cap (Russell 3000), then the top 1000 stocks (Russell 1000), and reclassifying the smaller 2000 stocks to form the Russell 2000 Small Cap Index. These serve as a benchmark for many institutional investors, as the indexes reflect the performance of the U.S. equity market across different market-cap classifications. The reconstitution process adds, removes, and weights stocks to ensure the indexes accurately represent the market.

The Preliminary List which will be published after the market closes on May 23, 2025, is a crucial step in the market cap reclassification process. It provides market participants with an initial glimpse into potential additions and deletions from the indexes. The stocks listed on this preliminary roster may experience increased attention from investors, as it hints at potential buying or selling pressure once the final reconstitution is completed.

The newly reconstituted indexes become live after the market close on June 23.

Implications for Investors

The release of the Russell Preliminary List on May 23 could provide opportunities for investors, including:

Enhanced Market Visibility – Companies listed on the Preliminary List may experience increased trading volumes and heightened market popularity, or even scrutiny, as investors evaluate their potential inclusion in the Russell indexes.

Potential Price Movements – Stocks slated for addition or deletion from the indexes can experience price volatility as market participants adjust their positions to align with the anticipated reconstitution changes.

Portfolio Adjustments – Active managers who track the Russell indexes may need to realign their portfolios to reflect the new index constituents, potentially triggering buying or selling activity in affected stocks.

Investor Considerations

Stock market participants should consider the following factors when analyzing the Preliminary List and its potential impact:

Final Reconstitution – The Preliminary List is subject to changes in the final reconstitution, which is typically announced in late June. Investors should monitor subsequent updates to confirm the actual index membership changes. These updates may occur as the result of faulty data or dramatic changes to the company such as a merger since the April 30 market cap snapshot.

Fundamental Analysis – As always, the fundamentals and financial health of the companies should be among the most important factors for non-index investors to consider. In the past, potential additions often presented attractive investment opportunities, while potential deletions may mean the stock gets less attention from investors.

Take Away

The release of the Preliminary List on May 23, 2025, marks a significant milestone in the Russell Reconstitution process. Investors should pay close attention to the stocks listed, as they may experience increased market visibility and potential price movements. However, it is important to remember that the Preliminary List is subject to changes. Thorough fundamental analysis, including earnings, potential growth, and liquidity assessment, is prudent for most stock investments. For more information to evaluate small-cap names, look to Channelchek as a source of data on over 6,000 small cap companies.

Russell Reconstitution 2025, What Investors Should Know

The Annual Russell Index Revision and Dates to Watch (2025)

The yearly process of recasting the Russell Indexes begins on Wednesday, April 30 and will be complete by market opening on June 30. During the period in between, FTSE Russell will rank stocks for additions, for deletions and evaluate the companies to make sure they conform overall. The methodology for inserting and removing tickers in the Russell 3000, Russell 2000, and Russell 1000 is intentionally transparent to help eliminate price shocks. Price movements do of course occur along the way, and investors try to foresee and capitalize on them. Channelchek will be providing updates that may uncover opportunities, or at least provide an understanding of stock price swings during this period.

Background

Russell index products are widely used by institutional and retail investors throughout the world. There is more than $20.1 trillion currently benchmarked to a Russell index. This includes approximately $12.1 trillion benchmarked to the Russell US Equity indexes. The trading volume of some companies moving into an index will heighten around the last Friday in June as fund managers seek to maintain level tracking with their benchmark target.

Opportunity

For non-passive investing, determining which stocks may benefit from moving up to a large-cap index, down to a smaller one, or into or out of the measurements is an annual event causing volatility around stocks. There has, of course, the potential for very profitable long and short trades. And the potential for an unwitting investor to be holding a company moving out of an index, which could cause less interest in the stock, and perhaps unfortunate performance.

Active investors should make themselves aware of the forces at play so they may either get out of the way or determine if they should become involved by taking positions with those being added or those at the end of their reign within one of the Russell measurements.

Dramatic Valuation Shifts

The leading industries and altered market-cap of companies of a year ago have changed dramatically from last year’s reconstitution. This will be reflected in the 2025 rebalancing and is going to impact a much larger number of companies than most years. That is to say, a higher percentage of companies than normal will move in, out, or to another index, and may be subject to amplified price movement.

The 2025 Russell Reconstitution Schedule:

• Wednesday, April 30th – “Rank Day” – Index membership eligibility for 2025 Russell Reconstitution determined from constituent market capitalization at market close.

• Friday, May 23rd – Preliminary index additions & deletions membership lists posted to the FTSE Russell website after 6 PM US eastern time.

•   Friday, May 30th, June 6th, 13th and 20th – Preliminary membership lists (reflecting any updates) posted to the FTSE Russell website after 6 PM US eastern time.

• Monday, June 9th – “Lock-down” period begins with the updates to reconstitution membership considered to be final.

• Friday, June 27th – Russell Reconstitution is final after the close of the US equity markets.

• Monday, June 30th – Equity markets open with the newly reconstituted Russell US Indexes.

Take-Away

The annual reconstitution is a significant driver of dramatic shifts in some stock prices as portfolio managers have their holding needs shifted within a very short period of time. Longer-term demand for certain equities is altered as well. Sizable price movements and volatility are expected, especially around the last week in June. In fact, the opening day of the reconstitution is typically one of the highest trading-volume days of the year in the US equity markets.

The market event impacts more than $9 trillion of investor assets benchmarked to or invested in products based on the Russell US Indexes. Portfolio managers that are required to track one of these indexes will work to have minimal portfolio slippage away from their benchmark.  The days and weeks from April 30th through the last Friday in June can create opportunities for investors seeking to benefit from price moves, Channelchek will be covering the event as stocks to be added to, or removed from this year’s Russell Reconstitution and other information plays out.