Moderna Will Join the Nasdaq-100 Index in October
The biotech firm will replace Warner Bros. Discovery in the index tracking over $800 billion in global assets.
Updated on Oct. 2, 2026 in Stock Markets
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Moderna, Inc. is set to join the Nasdaq-100 Index effective October 9, 2026. This change in the index composition will see the biotech company replace Warner Bros. Discovery, Inc.
Why it matters
The Nasdaq-100 measures the performance of 100 large, non-financial companies and is tracked by over 200 investment products globally. Updates to this index can influence the holdings of exchange-traded funds and other institutional investment vehicles.
The Nasdaq-100 index tracks 100 of the largest non-financial companies with over $800 billion in global assets under management. More than 200 investment products currently track this specific benchmark.
The players
Moderna, Inc.
A biotechnology company that focuses on mRNA-based vaccine and therapeutic technologies.
Warner Bros. Discovery, Inc.
A global media and entertainment company providing streaming, film, and television content.
Nasdaq
A global technology company that manages financial markets and maintains over 10,000 distinct indexes.
The details
Moderna, Inc. will join the index prior to the market open on October 9, 2026. As a component of the Nasdaq-100, the company will be part of a group tracked by hundreds of financial products worldwide. Warner Bros. Discovery, Inc. will be removed from the index as part of this scheduled transition.
Timeline
Moderna joins the Nasdaq-100 Index on October 9, 2026.
Money Landscape
This change follows the rules governing the Nasdaq-100 index methodology, which mandates periodic adjustments to ensure the index reflects the largest non-financial companies. It reflects the ongoing evolution of market benchmarks that serve as the foundation for institutional and retail investment products.
Investors holding index-tracking funds may see their portfolio composition shift slightly to include Moderna and exclude Warner Bros. Discovery on October 9. You should consult a financial professional to discuss how index-based fund rebalancing impacts your specific investment strategy.
The takeaway
Index rebalancing is a mechanical process that ensures market benchmarks remain current with changing corporate valuations. If you hold funds tracking the Nasdaq-100, check your fund's latest fact sheet after October 9 to understand how these component changes affect your underlying holdings.
What happens next
Moderna, Inc. will become a formal component of the Nasdaq-100 Index on October 9, 2026.
Further reading
For more information on how index changes affect the broader market, visit the Stock Markets section.
More information
View the latest Nasdaq index changes information to see full details on benchmark updates.
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