S&P Dow Jones Indices is adding oil and gas companies, among others, to the S&P 500, S&P MidCap 400 and S&P SmallCap 600 indices to better reflect their market capitalizations.

The changes will be implemented prior to the open of June 24 trading to better reflect  several companies’ value, according to a June 7 S&P press release.

Private equity investment firm KKR & Co. Inc. is joining the S&P 500, replacing talent acquisition firm Robert Half Inc. in the large-cap market space.

Minerals and royalties owner Texas Pacific Land Corp. is replacing transportation company Werner Enterprises Inc. in the S&P MidCap 400.

Tidewater, an offshore service vessels provider, is joining the S&P SmallCap 600 in replacement of software company Cerence Inc.


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