Nasdaq (Nasdaq: NDAQ) today announced the results of the annual reconstitution of the Nasdaq-100 Index® (NDX®), which will become effective prior to market open on Monday, December 22, 2025.
The following six companies will be added to the Index: Alnylam Pharmaceuticals, Inc. (Nasdaq: ALNY), Ferrovial SE (Nasdaq: FER), Insmed Incorporated (Nasdaq: INSM), Monolithic Power Systems, Inc. (Nasdaq: MPWR), Seagate Technology Holdings plc (Nasdaq: STX), Western Digital Corp. (Nasdaq: WDC).
The Nasdaq-100 Index is a globally recognized index that tracks the performance of 100 of the largest non-financial companies listed on the Nasdaq Stock Market® encompassing a diverse range of industries and sectors. From technology and retail to healthcare, telecommunications, biotechnology, and media, these companies collectively shape the new 21st century economy. The Nasdaq-100® is reconstituted each year in December, timed to coincide with the quadruple witch expiration Friday of the quarter.
As of December 2025, the Nasdaq-100 Index underpins more than 200 tracking products with over $600 billion in assets under management globally, including the Invesco QQQ Trust (QQQ®), which seeks to deliver investment results that, before expenses, correspond to the performance of the Nasdaq-100 Index. In addition to QQQ, a range of derivatives and structured instruments, such as futures, options, and other products based on the Nasdaq-100 Index and the Invesco QQQ Trust trade on various exchanges.
As a result of the reconstitution, the following six companies will be removed from the Index: Biogen Inc. (Nasdaq: BIIB), CDW Corporation (Nasdaq: CDW), GlobalFoundries Inc. (Nasdaq: GFS), Lululemon Athletica Inc. (Nasdaq: LULU), ON Semiconductor Corporation (Nasdaq: ON), The Trade Desk, Inc. (Nasdaq: TTD).
Information
For information about the six companies to be added to the Nasdaq-100 Index, please visit the following respective company websites:
- Alnylam Pharmaceuticals, Inc. – https://www.alnylam.com/
- Ferrovial SE – https://www.ferrovial.com/
- Insmed Incorporated – https://insmed.com/
- Monolithic Power Systems, Inc. – https://www.monolithicpower.com/
- Seagate Technology Holdings plc – https://www.seagate.com/
- Western Digital Corp. – https://www.westerndigital.com/
