---
title: "Gulfport Energy and Mobility Global Set to Join S&P SmallCap 600 | CLB Stock News"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/291013476.md"
description: "S&P Dow Jones Indices announced changes to the S&P SmallCap 600. Gulfport Energy (GPOR) will replace Select Medical Holdings (SEM) on July 1, 2026, due to SEM's acquisition. Mobility Global (MBGL) will replace Core Laboratories (CLB) on July 2, 2026, following SPGI's spin-off of Mobility Global and CLB's reduced representativeness of the small-cap market."
datetime: "2026-06-26T14:24:00.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/291013476.md)
  - [en](https://longbridge.com/en/news/291013476.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/291013476.md)
generator: "portal-rs"
---

# Gulfport Energy and Mobility Global Set to Join S&P SmallCap 600 | CLB Stock News

, /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

ABOUT S&P DOW JONES INDICES

S&P Dow Jones Indices is the largest global resource for essential index-based concepts, data and research, and home to iconic financial market indicators, such as the S&P 500® and the Dow Jones Industrial Average®. More assets are invested in products based on our indices than products based on indices from any other provider in the world. Since Charles Dow invented the first index in 1884, S&P DJI has been innovating and developing indices across the spectrum of asset classes helping to define the way investors measure and trade the markets.

S&P Dow Jones Indices is a division of S&P Global (NYSE: SPGI), which provides essential intelligence for individuals, companies, and governments to make decisions with confidence. For more information, visit www.spglobal.com/spdji/en/.

**FOR MORE INFORMATION:**

**S&P Dow Jones Indices**  
index\_services@spglobal.com

**Media Inquiries**  
spdji.comms@spglobal.com

SOURCE S&P Dow Jones Indices

### Related Stocks

- [SPGI.US](https://longbridge.com/en/quote/SPGI.US.md)
- [CLB.US](https://longbridge.com/en/quote/CLB.US.md)
- [SEM.US](https://longbridge.com/en/quote/SEM.US.md)
- [GPOR.US](https://longbridge.com/en/quote/GPOR.US.md)
- [.SPX.US](https://longbridge.com/en/quote/.SPX.US.md)
- [.DJI.US](https://longbridge.com/en/quote/.DJI.US.md)

## Related News & Research

- [S&P Ratings On Saudi Arabia Affirmed At 'A+/A-1' Outlook Stable](https://longbridge.com/en/news/298766410.md)
- [Gulfport Energy Corporation (NYSE:GPOR) Receives Consensus Rating of "Hold" from Analysts](https://longbridge.com/en/news/298423153.md)
- [S&P Dow Jones Indices loosens Canadian index inclusion criteria](https://longbridge.com/en/news/298835555.md)
- [Knollwood Investment Advisory LLC Trims Stock Holdings in S&P Global Inc. $SPGI](https://longbridge.com/en/news/298021844.md)
- [Gulfport Energy VP, CAO Matthew Willrath sells 325 shares for $59,374.25](https://longbridge.com/en/news/297963645.md)

---
> **Disclaimer: This article is for reference only and does not constitute any investment advice.**