Moderna to join the Nasdaq-100 index, replacing Warner Bros. Discovery

Nasdaq said Moderna will become a component of the Nasdaq-100 Index before the market opened on October 9, 2026, replacing Warner Bros. Discovery, which left the index after its acquisition by Paramount. Index funds that track the Nasdaq-100 must buy MRNA shares to match the change, which adds steady demand on the effective date. Moderna was first added to the index in July 2020, so this is a re-entry rather than a first listing.

• Announced October 1, 2026; effective before the open on Friday, October 9, 2026
• Replaces Warner Bros. Discovery (WBD) in the Nasdaq-100
• Nasdaq gave no specific reason for the selection
• Moderna was first added in July 2020, replacing CoStar Group