WISCONSIN POWER & LIGHT CO / WISCONSIN POWER AND LIGHT COMPANY / FILER INTERSTATE POWER & LIGHT CO / ALLIANT ENERGY CORP / INTERSTATE POWER AND LIGHT COMPANY / Alliant Energy Resources LLC / Large Accelerated Filer Alliant Energy Corporation / RMT Inc. / NextEra Energy Resources LLC / /
energy markets / purchased electricity / electricity / retail electric base rate freeze / tax accounting methods / emission control equipment / tax audits / utility services / corporate Web site / energy / /
Organization
UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON / D.C. / Internal Revenue Service / Sierra Club / Regional Transmission Organization / Securities and Exchange Commission / Riverside Energy Center / Environmental Protection Agency / / /