Summary: Alliant Energy Corp.

Integrated electricity and natural gas distribution operations under generally constructive regulatory frameworks in Iowa and Wisconsin. Modest operating and regulatory diversity with operations in two states. Medium-sized customer base consisting of about 1.36 million electric and natural gas customers. Focus on rebalancing generation portfolio by building natural gas and renewable generation assets while retiring coal-fired generation. Lack of material exposure to unregulated operations. Large planned capital spending program leads to negative discretionary cash flow. Some expected weakness in financial performance in 2016 primarily due to rate freezes. Expected rate relief in 2017 will preserve current level of financial performance. The stable outlook on Alliant Energy Corp. (Alliant), and its utility subsidiaries Interstate Power&Light Co. (IPL) and Wisconsin Power

...(Editor's Note: The summary analysis on Alliant Energy Corp. published on Jan. 17, 2017, incorrectly referenced senior unsecured debt. There is no senior unsecured debt at this entity. A corrected version follows.)...

Summary