S&P Dow Jones Indices announced significant changes to its major indices, including the S&P 500, S&P 100, S&P MidCap 400, and S&P SmallCap 600. These adjustments, effective September 22nd, aim to better reflect current market capitalizations.
Several companies will be added to the S&P 500. AppLovin Corp., Robinhood Markets Inc., and Emcor Group Inc. will join, replacing MarketAxess Holdings Inc., Caesars Entertainment Inc., and Enphase Energy Inc., respectively.
The S&P 100 will also see a change. Uber Technologies Inc. will replace Charter Communications Inc., although Charter Communications will remain listed in the S&P 500.
The S&P MidCap 400 will welcome MP Materials Corp., Kratos Defense & Security Solutions Inc., Nutanix Inc., and TransUnion. These additions will offset the removal of Emcor Group, The Wendy’s Company, Acadia Healthcare Company Inc., and ManpowerGroup Inc.
Companies leaving the S&P MidCap 400 will move to the S&P SmallCap 600. Additionally, MarketAxess Holdings, Caesars Entertainment, Enphase Energy, and The Wendy’s Company will also join the S&P SmallCap 600. Several other companies will be removed from the S&P SmallCap 600 to make room for these additions. These include ProPetro Holdings Corp., Xerox Holdings, MP Materials Corp., Kratos Defense & Security Solutions, TechTarget Inc., Mesa Laboratories Inc., Owens & Minor Inc., B&G Foods Inc., Jack in the Box Inc., and Simulations Plus Inc.
These changes are a routine part of the quarterly rebalancing process undertaken by S&P Dow Jones Indices. The organization stated the goal is to maintain the accuracy and representativeness of its indices, ensuring they continue to reflect the broader market’s dynamics. The changes will take effect before the opening bell on Monday, September 22nd.
S&P Dow Jones Indices, a division of S&P Global, is a leading provider of index-based data and research, with a portfolio including the well-known S&P 500 and the Dow Jones Industrial Average.










