AppLovin, Robinhood, and Emcor Group Stocks Surge on S&P 500 Inclusion
AppLovin (APP) and Robinhood (HOOD) saw their stocks rise over 6% in after-hours trading, while Emcor Group (EME) gained 2% following their inclusion in the S&P 500 Index. The changes, effective September 22, 2025, replace MarketAxess Holdings, Caesars Entertainment, and Enphase Energy, which will shift to the S&P SmallCap 600.
AppLovin's nearly 480% surge over the past year stems from robust demand for its AI-driven ad platform, Axon 2, which fueled a 77% YoY revenue jump to $1.26 billion in Q2 2025. Robinhood, up 435% annually, reported a 45% revenue increase to $989 million in the same quarter. Index-tracking funds are expected to drive further upside for both stocks.