Maplebear (CART) will replace Enovis (ENOV) in the S&P MidCap 400 index, while Enovis will replace Arch Resources (ARCH) in the S&P SmallCap 600 effective prior to the opening of trading on Jan. 14, S&P Dow Jones Indices said late Tuesday.

S&P SmallCap 600 constituent CONSOL Energy (CEIX) is acquiring Arch Resources and changing its name to Core Natural Resources, trading under the ticker symbol "CNR," in a deal expected to close soon.