This report does not constitute a rating action. Alliant Energy Corp. (AEC) has increased its four-year capital plan (fiscals 2026-2029) to $13.4 billion, a $1.9 billion increase from the previous plan, largely fueled by data center-driven investments. The company has entered into an agreement with Quality Technology Services (QTS) to service 900 megawatts of power at its Madison site, which will require additional generation capacity, including investments in natural gas generation, battery storage, and renewables. This follows agreements already in place to service an aggregate 2.1 gigawatts of data center demand in Cedar Rapids, Iowa and Beaver Dam, Wis., which the company expects to service using its existing and new generation. The contracted data center agreements will be serviced under
