Gulfport Energy and Mobility Global Set to Join S&P SmallCap 600

Rhea-AI Summary

Core Laboratories (NYSE: CLB) will be removed from the S&P SmallCap 600 prior to the open on July 2, 2026, and replaced by Mobility Global (NYSE: MBGL).

According to S&P Dow Jones Indices, Core Laboratories is no longer representative of the small-cap market space.

Positive

• None.

Negative

• Core Laboratories (CLB) deleted from S&P SmallCap 600 on July 2, 2026

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NEW YORK, June 26, 2026 /PRNewswire/ -- S&P Dow Jones Indices will make the following changes to the S&P SmallCap 600:

• Gulfport Energy Corp. (NYSE: GPOR) will replace Select Medical Holdings Corp. (NYSE: SEM) effective prior to the opening of trading on Wednesday, July 1.  Select Medical Holdings is being acquired in a deal expected to be completed soon, pending final closing conditions.
  
  
• Mobility Global Inc. (NYSE: MBGL) will replace Core Laboratories Inc. (NYSE: CLB) effective prior to the opening of trading on Thursday, July 2. S&P 500 constituent S&P Global Inc. (NYSE: SPGI) is spinning off Mobility Global in a transaction expected to be completed July 1. Core Laboratories is no longer representative of the small-cap market space.

Following is a summary of the changes that will take place prior to the open of trading on the effective date:

Effective Date	Index Name	Action	Company Name	Ticker	GICS Sector
July 1, 2026	S&P SmallCap 600	Addition	Gulfport Energy	GPOR	Energy
July 1, 2026	S&P SmallCap 600	Deletion	Select Medical Holdings	SEM	Health Care
July 2, 2026	S&P SmallCap 600	Addition	Mobility Global	MBGL	Industrials
July 2, 2026	S&P SmallCap 600	Deletion	Core Laboratories	CLB	Energy

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View original content:https://www.prnewswire.com/news-releases/gulfport-energy-and-mobility-global-set-to-join-sp-smallcap-600-302812407.html

SOURCE S&P Dow Jones Indices

FAQ

When will Core Laboratories (NYSE: CLB) be removed from the S&P SmallCap 600 index?

Core Laboratories is set to be removed from the S&P SmallCap 600 before trading opens on July 2, 2026. According to S&P Dow Jones Indices, this change follows a scheduled index rebalancing that also adds Mobility Global to the index.

Why is Core Laboratories (CLB) being deleted from the S&P SmallCap 600?

Core Laboratories is being deleted because it is described as no longer representative of the small-cap market space. According to S&P Dow Jones Indices, this adjustment is part of index maintenance to keep the S&P SmallCap 600 aligned with its small-cap exposure objective.

Which company will replace Core Laboratories (CLB) in the S&P SmallCap 600?

Mobility Global (NYSE: MBGL) will replace Core Laboratories in the S&P SmallCap 600. According to S&P Dow Jones Indices, MBGL will be added to the index prior to the opening of trading on July 2, 2026, when CLB is simultaneously deleted.

How could the S&P SmallCap 600 deletion affect Core Laboratories (CLB) shareholders?

Deletion from the S&P SmallCap 600 can reduce automatic index-fund ownership of Core Laboratories shares. According to S&P Dow Jones Indices, CLB will be removed July 2, 2026, which may influence trading volumes and demand from small-cap index and ETF investors.

What other index changes are happening when Core Laboratories (CLB) leaves the S&P SmallCap 600?

Alongside Core Laboratories’ removal on July 2, 2026, Mobility Global will be added to the S&P SmallCap 600. According to S&P Dow Jones Indices, Gulfport Energy will also join the index on July 1, replacing Select Medical Holdings, which is being acquired.