from overseas holdings. Since its inception, Entergy has been headquartered in New Orleans. That city had also been home to Entergy's various corporate predecessors since 1925. After Hurricane Katrina hit the city of New Orleans in August 2005, Entergy temporarily relocated the 1,500 employees and contractors who worked at the headquarters to other cities, including Clinton, Mississippi, Little Rock, Arkansas, and The Woodlands, Texas. In April 2006, the company began moving back into its New Orleans headquarters. Paul Hinnenkamp was named Chief Operating Officer and senior vice president in November 2015. He replaced Mark Savoff, who announced his retirement a few months earlier. In 2011, Entergy and Coulomb Technologies, an electric vehicle charging station maker, began to donate free electric vehicle charging stations at 16 sites at college campuses in the southern U.S. Its first installation was at Louisiana State University in Baton Rouge, and is free to use for faculty and students. Subsidiaries Entergy Arkansas (formerly Arkansas Power and Light Company (AP&L)) Entergy Louisiana (formerly Louisiana Power and Light Company (LP&L)) Entergy Gulf States Louisiana (formerly the Louisiana operations of Gulf States Utilities (GSU)) was merged into Entergy Louisiana in 2015. Entergy New Orleans (formerly New Orleans Public Service, Inc. (NOPSI)) Entergy Nuclear Entergy Mississippi (formerly Mississippi Power and Light Company (MP&L)) Entergy Texas (formerly the Texas operations of Gulf States Utilities (GSU)) Former subsidiary company logos Prior to the use of the current Entergy logo, each subsidiary had its own distinctive logo. Upon the renaming of the company from Middle South Utilities System to Entergy, the present logo was adopted. Louisiana Power and Light Company, for example (today's Entergy Louisiana) used the logo shown at right extensively from about 1967 to 1989, on buildings equipment, and advertising. Each of Middle South Utilities' subsidiaries used similar-styled logos Operations Entergy's service territory includes the southeast corner of Louisiana and the cities of Lafayette and Baton Rouge, the eastern three-fourths of Arkansas and the western half of Mississippi. It also includes part of southeastern Texas, including the Beaumont-Port Arthur-Orange and Conroe-Woodlands-Kingwood areas. A member of the Fortune 500, Entergy owns and operates power plants with approximately 30,000 megawatts of electric generating capacity, and it is the second-largest nuclear generator in the United States after Exelon Corporation. It had annual revenues of more than $11 billion in 2010 and approximately 15,000 employees. Entergy's main operating segments consist of the U.S. utility segment