Investing.com -- Carvana Co (NYSE:CVNA) stock surged 9% following the announcement that it will be added to the S&P 500 index as part of the quarterly rebalance, effective prior to market open on December 22, 2025.
S&P Dow Jones Indices revealed that Carvana will join the prestigious index alongside CRH PLC (NYSE:CRH), which jumped 7%, and Comfort Systems USA Inc (NYSE:FIX), which gained 1.8% in after-hours trading on Friday. The three companies will replace LKQ Corporation (NASDAQ:LKQ), Solstice Advanced Materials, and Mohawk Industries Inc (NYSE:MHK), which fell 1.5%, 0.1%, and 0.4% respectively.
The index changes are part of a broader quarterly rebalance that also affects the S&P MidCap 400 and S&P SmallCap 600 indices. UL Solutions Inc (NYSE:ULS) and Pinterest Inc (NYSE:PINS) were among the beneficiaries of the midcap additions, with their stocks rising 3.3% and 4.2% respectively. Booz Allen Hamilton Holding (NYSE:BAH) also gained 4.2% on news of its inclusion in the S&P MidCap 400.
Other companies being added to the MidCap 400 include SPX Technologies, Dycom Industries, Borgwarner, and Hecla Mining Co. Meanwhile, eight companies will be removed from the midcap index, including both classes of Under Armour stock, Power Integrations, Perrigo Company, and Iridium Communications.
The S&P SmallCap 600 will undergo even more significant changes, with 13 additions and 13 deletions. Companies being added to the small-cap index include those removed from the larger indices, plus Primoris Services, Casella Waste Systems, Indivior, and Hawaiian Electric Industries.
According to S&P Dow Jones Indices, these changes are designed to ensure each index better represents its respective market capitalization range.
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