The Russell 1000 Index is a stock market index that tracks the highest-ranking 1,000 stocks in the Russell 3000 Index, which represent about 93% of the total market capitalization of that index. , the stocks of the Russell 1000 Index had a weighted average market capitalization of $381.3 billion and a median market capitalization of $12.2 billion. , components ranged in market capitalization from $1.8 billion to $1.4 trillion. The index, which was launched on January 1, 1984, is maintained by FTSE Russell, a subsidiary of the London Stock Exchange Group. The ticker symbol is ^RUI. There are several exchange-traded funds and mutual funds that track the index. Record values Annual returns Top sectors by weight Technology Health Care Industrials Consumer Discretionary Financials Top 10 holdings Apple () Microsoft () Amazon () Berkshire Hathaway () Alphabet (Class A) () UnitedHealth Group () Alphabet (Class C) () Johnson & Johnson () ExxonMobil () JPMorgan Chase () (as of December 31, 2022) Components Components as of October 24, 2022 are: See also Russell Investments Russell 3000 Index Russell 2000 Index References External links FTSE/Russell home page Index Construction and Methodology 1000_Index American stock market indices