NEW YORK, Nov. 7, 2018 /PRNewswire/ -- S&P Dow Jones Indices will make the following changes to the S&P 500, S&P MidCap 400 and S&P SmallCap 600:

• S&P MidCap 400 constituent Jack Henry & Associates Inc. (NASD: JKHY) will replace EQT Corp. (NYSE: EQT) in the S&P 500, and EQT will replace Jack Henry & Associates in the S&P MidCap 400 effective prior to the market open on Tuesday, November 13. Equitrans Midstream Corp. (NYSE: ETRN) will be added to the S&P MidCap 400 effective prior to the market open on November 13. Superior Energy Services Inc. (NYSE: SPN) will be removed from the S&P MidCap 400 effective prior to the opening on Wednesday, November 14, and will replace Flotek Industries Inc. (NYSE: FTK) in the S&P SmallCap 600. EQT is spinning off approximately 80% of its stake in Equitrans Midstream effective after the close on Monday, November 12. Post spin-off, EQT and Equitrans Midstream will both have market caps more representative of the mid-cap market space. Superior Energy Services' market capitalization is more representative of the small-cap market space, and Flotek is ranked at the bottom of the S&P SmallCap 600.
• MasTec Inc. (NYSE: MTZ) will replace United Natural Foods Inc. (NASD: UNFI) in the S&P MidCap 400, and United Natural Foods will replace MiMedx Group Inc. (NASD: MDXG) in the S&P SmallCap 600 prior to the market open on Monday, November 12. The NASDAQ Stock Market has determined MiMedx Group is no longer in compliance with listing standards. Therefore, MiMedx will no longer be eligible for the S&P SmallCap 600. United Natural Foods has a market capitalization that is more representative of the small-cap market space.

Jack Henry & Associates provides technology solutions and payment processing services primarily for financial services organizations. Headquartered in Monett, MO, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Data Processing & Outsourced Services Sub-Industry index.

EQT Corp operates in the natural gas industry. Headquartered in Pittsburgh, PA, the company will be added to the S&P MidCap 400 GICS Oil & Gas Exploration & Production Sub-Industry index.

Equitrans Midstream owns, operates and develops midstream assets in the Appalachian Basin. Headquartered in Pittsburgh, PA, the company will be added to the S&P MidCap 400 GICS Oil & Gas Storage & Transportation Sub-Industry index.

Mastec provides engineering, building, installation, maintenance, and upgrade services for communications, energy, and utility infrastructure. Headquartered in Coral Gables, FL, the company will be added to the S&P MidCap 400 GICS Construction & Engineering Sub-Industry index.

Superior Energy Services provides oilfield services and equipment to oil and natural gas exploration and production companies. Headquartered in Houston, TX, the company will be added to the S&P SmallCap 600 GICS Oil & Gas Equipment & Services Sub-Industry index.

United Natural Foods distributes natural, organic, and specialty foods and non-food products. Headquartered in Providence, RI, the company will be added to the S&P SmallCap 600 GICS Food Distributors.

Following is a summary of the changes:

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