S&P SmallCap 600 Adds Gulfport Energy, Mobility Global in July Rebalancing

Key Facts

1S&P Dow Jones Indices announced two changes to the S&P SmallCap 600 index: Gulfport Energy will replace Select Medical Holdings on July 1, 2026, and Mobility Global will replace Core Laboratories on July 2, 2026.

2Core Laboratories is removed as it is no longer considered representative of the small-cap market space, while Mobility Global is added following its spin-off from S&P Global Inc.

The S&P SmallCap 600 index rebalancing announced by S&P Dow Jones Indices reflects corporate events reshaping the small-cap landscape: Gulfport Energy will replace Select Medical Holdings on July 1, 2026, and Mobility Global will replace Core Laboratories on July 2, 2026. The changes stem from a routine review aimed at maintaining accurate representation of the small-cap market space.

Mobility Global, a recent spin-off from S&P Global Inc., becomes eligible for the index as an independent company, while Core Laboratories is removed as it no longer fits the small-cap criteria. Separately, Select Medical Holdings is being acquired, prompting its replacement by Gulfport Energy, an oil and gas producer. These shifts are standard for index maintenance.

Investors should watch for potential fund-flow adjustments by ETFs tracking the S&P SmallCap 600 ahead of the effective dates. Gulfport Energy and Mobility Global may see increased trading volumes as passive funds adjust their holdings. While no broad market impact is expected, the rebalancing could create short-term opportunities for active traders.