AppLovin, Robinhood, and Emcor Rally on News They Will Join the S&P 500. Here’s Who Didn’t Make the Cut. A ppLovin, Robinhood Markets, and Emcor Group will join the S&P 500 index later in September in conjunction with the index’s quarterly rebalancing, according to S&P Dow Jones Indices, which oversees the benchmark index.

Robinhood Markets, AppLovin, and Emcor Group shares gained on word they will be added to the S&P 500 prior to the start of trading Sept. 22.

Robinhood will join the S&P 500 during the index's its end-of-September rebalancing, along with AppLovin and Emcor.