Nasdaq-100

Nasdaq-100

Nasdaq-100 Index from 1985 to 2015
Foundation	January 31, 1985; 40 years ago (1985-01-31)
Operator	Nasdaq, Inc.
Exchanges	Nasdaq
Trading symbol	^NDX or NDX
Constituents	101
Type	Large-cap
Market cap	US$25.34 trillion (as of May 1, 2025)
Weighting method	Free-float capitalization-weighted
Related indices	Nasdaq Financial-100
Website	nasdaq.com/nasdaq-100

The Nasdaq-100 (NDX^[1]) is a stock market index made up of equity securities issued by 100 of the largest non-financial companies listed on the Nasdaq stock exchange. It is a modified capitalization-weighted index. The stocks' weights in the index are based on their market capitalizations, with certain rules capping the influence of the largest components. It is limited to companies from a single exchange, and it does not have any financial companies. The financial companies are in a separate index, the Nasdaq Financial-100.