Gibson Dunn Represented the Underwriters in a $600 Million Public Offering by Interstate Power and Light Company

Firm News  |  May 20, 2025

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Gibson Dunn represented the underwriters in a public offering by Interstate Power and Light Company (IPL) of $600 million aggregate principal amount of IPL’s 5.600% senior debentures due 2035.

The underwriters were led by BofA Securities, Inc., Mizuho Securities USA LLC, MUFG Securities Americas Inc., and Wells Fargo Securities, LLC. IPL is a public utility company and a wholly owned subsidiary of Alliant Energy Corporation.

Our team was led by partner Andrew Fabens and of counsel Rodrigo Surcan, and included associates Lawrence Lee, Ian Mathenge, and Stephen Huie. Partner William Hollaway and senior counsel Janine Durand advised on regulatory aspects; partner Rachel Levick and associate Taylor Amato advised on environmental aspects; and partner Lorna Wilson advised on tax.