Trading app Robinhood Markets, mobile app monetization company AppLovin, and building company Emcor Group, will be added to the S&P 500 later this month, S&P Dow Jones Indices announced Friday.

Robinhood will replace Caesar’s Entertainment, AppLovin will take MarketAxess Holding’s spot, and Emcor will take Enphase Energy’s place. The changes take effect on September 22.

The S&P 500 rebalances the index quarterly. No changes were made at the start of the most recent quarter in June.

“The changes ensure each index is more representative of its market capitalization range. The companies being removed from the S&P SmallCap 600 are no longer representative of the small-cap market space,” the S&P Dow Jones Indices said.

In the minutes after the announcement, shares of Robinhood were up 7.2%,

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