Gulfport Energy and Mobility Global Join S&P 600, Following Index Rebalance

S&P Dow Jones Indices will add Gulfport Energy Corp. (GPOR) and Mobility Global Inc. (MBGL) to the S&P SmallCap 600. These changes are part of the index's regular rebalancing.

Gulfport Energy replaces Select Medical Holdings Corp. effective prior to the market open on Wednesday, July 1, 2026. Select Medical Holdings exits the index due to its pending acquisition.

Mobility Global replaces Core Laboratories Inc. before trading begins on Thursday, July 2, 2026. Core Laboratories is being removed because it no longer represents the small-cap market space.