Mobix Labs Added to Russell® Microcap Index and Russell 3000E Index Growth Benchmark

Key Terms

russell microcap index financial

A broad market index that tracks the performance of the smallest publicly traded U.S. companies by market value, the Russell Microcap Index measures how tiny, often early-stage or niche firms are doing overall. Investors use it like a thermometer: it shows the health and trends of the micro-cap segment, helps compare fund performance, and guides decisions about risk, diversification and potential for high growth or volatility.

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A fund that pools investors’ money to buy the same collection of stocks or bonds that make up a market index — like a ready-made basket representing the whole market or a specific slice of it. It matters because it gives broad exposure with lower fees and simpler management than picking individual securities, reducing the impact of any single holding and making it efficient for long-term investing.

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ETFs, or exchange-traded funds, are investment funds that hold a collection of stocks, bonds, or other assets, and can be bought or sold on stock exchanges like individual shares. They offer investors an easy way to diversify their holdings and access different markets or sectors without buying multiple individual assets. Because they are traded throughout the day, ETFs provide flexibility and can help investors manage risk while pursuing their financial goals.

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Market-capitalization is the total value of a company’s outstanding shares, calculated by multiplying the current share price by the number of shares issued. It gives investors a quick sense of a company’s size—like estimating the value of a bakery by multiplying the price of one slice by how many slices it sells—and helps judge relative risk, growth potential and how a stock fits into a diversified portfolio.

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IRVINE, Calif.--(BUSINESS WIRE)-- Mobix Labs, Inc. (Nasdaq: MOBX) announced it has been added to the Russell Microcap^® Index, effective with the market’s opening on June 29, as part of the 2026 Russell indexes reconstitution. Through its addition to the Microcap Index, Mobix Labs is also included in the Russell 3000E® Index, which provides the broadest coverage of investable US equities.

Russell Indexes Attract Significant Investment

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for active investment strategies. Approximately $12 trillion in assets are currently benchmarked to or invested in products tracking Russell U.S. indexes.

Russell Microcap® Index

Membership in the Russell Microcap® Index remains in place for half a year and means automatic inclusion in the appropriate growth and value style indexes. FTSE Russell determines membership for its indexes primarily by objective, market-capitalization rankings and style attributes. As of April 30, 2026, the Russell Microcap® Index included 1,375 securities with market caps ranging from $1.1B to $30.1M.

Russell 3000E® Index

The Russell 3000E® Index is an ultra-broad market benchmark that tracks the performance of the largest publicly traded U.S. companies. It combines the Russell 3000® Index with the Russell Microcap® Index to provide the broadest coverage of investable US equities, including up to the 4,000 largest US stocks by total market capitalization as of the reconstitution rank date. Mobix Labs has been included in the Russell 3000E Growth Benchmark, a growth-oriented segment of the Russell 3000E® Index.

Mobix President and CFO, Keyvan Samini, commented, “We are pleased to be included in the Russell Microcap and 3000E Indexes. We believe our membership could be helpful in expanding Mobix Labs’ exposure to institutional investors and the broader investment community, in addition to index funds and ETFs that utilize Russell indexes to manage a substantial pool of global assets.”

Fiona Bassett, CEO of FTSE Russell, an LSEG business, commented, “The Russell indexes have continuously adapted to the evolving dynamic US economy, and it’s crucial to fully recalibrate the suite of Russell US Indexes, ensuring they maintain an accurate representation of the market. The transition to a semi-annual reconstitution frequency this year will ensure our indexes continue to represent the market and maintain the purpose of the index as a portfolio benchmark.”

For more information on the Russell Microcap^® Index and the Russell indexes reconstitution, go to the “Russell Reconstitution” section on the FTSE Russell website.

About FTSE Russell (www.lseg.com/en/ftse-russell)

FTSE Russell, wholly owned by the London Stock Exchange Group (LSEG), is a global index leader that provides innovative benchmarking, analytics and data solutions for investors worldwide. Approximately $21.2 trillion in investments are benchmarked to FTSE Russell indexes. FTSE Russell index expertise and products are used extensively by institutional and retail investors globally to benchmark their investment performance and create ETFs, structured products and index-based derivatives.

About Mobix Labs, Inc. (www.mobixlabs.com)

Mobix Labs develops advanced electronics, connectivity, RF, and sensing technologies for aerospace, defense, drone and other high-reliability markets. Mobix Labs solutions are deployed on platforms including the F-22 Raptor, Apache helicopters, U.S. Navy programs, and Boeing 737NG and Gulfstream aircraft.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include, but are not limited to, statements regarding Mobix Labs, Inc.’s expectations, beliefs, intentions, or strategies concerning future events or results, including statements regarding anticipated production timing, expected shipment schedules, the scope and continuation of customer programs, demand for the Company’s products, expansion of relationships with existing and new customers, participation in defense and aerospace programs, and the Company’s positioning within the defense supply chain.

These forward-looking statements are based on current expectations and assumptions that are subject to risks and uncertainties, many of which are beyond the Company’s control. Actual results could differ materially from those expressed or implied by these forward-looking statements due to a number of factors, including, but not limited to: changes in customer demand or program requirements; delays, modifications, or cancellations of orders or contracts; timing and execution of production and shipments; supply chain constraints or disruptions; the Company’s ability to meet performance, quality, and delivery requirements; general economic and market conditions; regulatory and governmental factors affecting defense programs; budgetary decisions or funding levels impacting defense spending; and other risks and uncertainties described in the Company’s filings with the U.S. Securities and Exchange Commission.

Forward-looking statements speak only as of the date of this press release. The Company undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by law.

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MOBX Investor Relations Contacts
Chris Eddy or David Collins
Catalyst IR
mobx@catalyst-ir.com or 212-924-9800

Source: Mobix Labs, Inc.