• Incorporated in 1981, Alliant Energy Corporation is a public utility holding company. It is comprised of several subsidiaries which provide electricity to northern Iowa, southern Minnesota, Illinois and Wisconsin.

    The company also provides non-regulated services, including ground transportation and wind and geothermal energy engineering.

    1. Stock symbol: NYSE: LNT
    2. Annual revenue (2007): $3.36 billion
    3. Primary subsidiary: Interstate Power and Light Company (IPL)
    4. Primary subsidiary: Wisconsin Power and Light Company (WPL)
    5. Incorporated: 1981
    6. Industry: Electricity
    7. Phone: 608.458.3311
    8. Fax: 608.458.0100
    9. HQ: Madison, WI
    10. CEO: William D. Harvey
    11. CFO: Eliot G. Protsch
    12. Employees: 8,500

  • Customer Contact

    • Phone: 1.800.ALLIANT (800.255.4268)
    • Email: customercare@alliantenergy.com
    • Fax: 608.458.0100
    • Mail:
      • Alliant Energy
      • 4902 North Biltmore Lane
      • P.O. Box 77007
      • Madison WI 53707-1007

  • Emergency Contacts

    • Report outage (IPL): 1.877.740.5050
    • Report outage (WPL): 1.800.862.6261
    • Report gas emergency (IPL): 1.800.255.4268
    • Report gas emergency (WPL): 1.800.862.6263

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