MPJ on NYSE

Mississippi Power

Logo: Sylvia Pinegar, CC BY-SA 4.0, via Wikimedia Commons4

Investor-owned electric utility

Mississippi Power, previously known as Mississippi Power Company (MPC), is an electric utility company. Its headquarters are in Gulfport, Mississippi, and it is a subsidiary of Atlanta-based, Southern Company. Mississippi Power has more than 1,000 employees and serves most of the cities, towns, and communities within the 23 counties of southeast Mississippi.2 Its shares trade on NYSE under the symbol MPJ.1 Wikipedia text CC BY-SA 4.0

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Last updated Oct 21, 2026.

Overview

1925Founded1

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  • TickerMPJ on NYSE1
  • Industrypublic utility1
  • HeadquartersGulfport1
  • Websitewww.mississippipower.com
  • Legal formBusiness Corporation3
  • LEILNZ0J6YZ5SC6ILIRU8503
  • StatusActive3
  • LEI statusIssued and current3
  • Registered addressC/O Jamie R. Gollott, 39501 Gulfport, United States3
  • Registered withBusiness Services, Office of the Secretary of State, 1042973

Mississippi Power, previously known as Mississippi Power Company (MPC), is an electric utility company. Its headquarters are in Gulfport, Mississippi, and it is a subsidiary of Atlanta-based, Southern Company.2

Corporate structure

Mississippi Power is part of a group headed by Southern Company. 29 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Southern Company Atlanta, Georgia, United States
    • Georgia Power 100% · Atlanta, Georgia, United States
    • Mississippi Power 100% · Gulfport, Mississippi, United States
    • AGL Resources Atlanta, Georgia, United States
      • CENTRAL VALLEY GAS STORAGE, L.L.C. Subsidiary · Atlanta, Georgia, United States
      • GOLDEN TRIANGLE STORAGE, LLC Subsidiary · Wilmington, Delaware, United States
      • JEFFERSON ISLAND STORAGE & HUB L.L.C. Subsidiary · Houston, Texas, United States
      • NICOR ENERCHANGE, L.L.C. Subsidiary · Houston, Texas, United States
      • NORTHERN ILLINOIS GAS COMPANY Subsidiary · Naperville, Illinois, United States
      • SOUTHERN COMPANY GAS CAPITAL CORPORATION Subsidiary · Birmingham, Alabama, United States
      • SOUTHSTAR ENERGY SERVICES LLC Subsidiary · Wilmington, Delaware, United States
        • ILLINOIS ENERGY SOLUTIONS, USA, LLC Subsidiary · Wilmington, Delaware, United States
        • ILLINOIS ENERGY, USA, LLC Subsidiary · Atlanta, Georgia, United States
      • VIRGINIA NATURAL GAS, INC. Subsidiary · Virginia Beach, Virginia, United States
    • Southern Nuclear Subsidiary · 100% · Birmingham
    • Southern Linc Subsidiary · Atlanta
    • Alabama Power Company Subsidiary · 100% · Birmingham, Alabama, United States
    • ENERGY RESOURCE INSURANCE CORPORATION Subsidiary · Atlanta, Georgia, United States
    • Southern Electric Generating Company Subsidiary · Birmingham, Alabama, United States
    • SOUTHERN POWER COMPANY Subsidiary · Atlanta, Georgia, United States
      • GLASS SANDS WIND ENERGY, LLC Subsidiary · Atlanta, Georgia, United States
      • GRANT PLAINS WIND, LLC Subsidiary · Atlanta, Georgia, United States
      • MILLERS BRANCH SOLAR, LLC Subsidiary · Atlanta, Georgia, United States
      • PASSADUMKEAG WINDPARK, LLC Subsidiary · Wilmington, Delaware, United States
      • READING WIND ENERGY, LLC Subsidiary · Wilmington, Delaware, United States
      • SALT FORK WIND, LLC Subsidiary · Atlanta, Georgia, United States
      • SP ENERGY TRADING, LLC Subsidiary · Atlanta, Georgia, United States
      • TYLER BLUFF WIND PROJECT, LLC Subsidiary · Wilmington, Delaware, United States
      • WAKE WIND ENERGY LLC Subsidiary · Wilmington, Delaware, United States

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

The story

Mississippi Power Company was founded in 1925. In 1949, Southern Company was established as a holding company for four utilities, one of which included Mississippi Power Company.

Formerly known as Mississippi Power Company from 1925 to 1976, the company shortened to Mississippi Power, and has maintained that name ever since.

Hurricane Katrina

August 29, 2005, Hurricane Katrina struck, taking down the company's electric systems and leaving every single customer without service. With a team of 12,000 - employees and crews from every state and Canada, they were able to restore service to all who could receive it in only 12 days. The severity of the storm has cautioned Mississippi Power with every future investment it has made. Most noticeably is the location of the Kemper Project, which was purposefully selected to be comfortably located miles from the Gulf. It is no wonder that the Kemper Project, officially named Plant Ratcliffe, was named after the 2005 Southern Company CEO, David Ratcliffe.

in 2007, Mississippi Power teamed with the Mississippi Department of Wildlife and Fisheries to begin restocking the Pascagoula River after Hurricane Katrina's massive fish kill by releasing more than 2,500 largemouth bass advanced fingerlings.

On the 20th anniversary of Hurricane Katrina, Mississippi Power Storm Director Stephen Schruff joined WXXV News 25 to discuss the days following the storm and what lessons were learned in the aftermath.

From Wikipedia’s article on Mississippi Power, shared under CC BY-SA 4.0.5

Products and brands

Transmission and distribution facilities

Mississippi Power maintains 147 substations, 2,118 miles of transmission lines, 4,213 miles of primary overhead lines and 560 miles of primary underground lines. Total generating capacity is 3,098,692 kW.

Former plants

The Eaton Electric Generating Plant was a three-unit natural gas-fired power plant located in Petal, Mississippi. Each of the three units generated 22.5 Megawatts (MW) of electricity, with a total plant capacity of 67.5 MW. The plant drew cooling water from the Leaf River.

Named for Barney Eaton, Mississippi Power's first president, the plant was the first high-pressure steam plant in the state of Mississippi and the first plant built by Mississippi Power Company. Plant Eaton made headlines when it was built in 1945, as it was the largest and most modern plant of its day. The first unit came on line on March 22, 1945.

Originally, Plant Eaton was intended to generate electricity to aid the United States in production of materials for World War II; however, the plant's largest contribution turned out to be producing power for the boom in electricity demanded following the war. As of the late 1990s, its use was limited to meeting peak demands during the summer.

Read the full text

Plant Eaton was closed down in 2012 due to declining efficiency. The plant was demolished in 2014.

From Wikipedia’s article on Mississippi Power, shared under CC BY-SA 4.0.5

Subsidiaries and ownership

Parent company

Owners

From Wikidata.1

Timeline

  1. Feb 8, 2019Parent Directly consolidated by Southern Company3
  2. 1925Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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