LNT · 10-Q · 2026Q3 · Full report

IEEPA Tariff Refunds

ALLIANT ENERGY CORP · 2026-10-30 · Importance 28 · Surprise 42

In February 2026, the U.S. Supreme Court ruled that IEEPA did not authorize the Executive Branch to impose tariffs, and the Court of International Trade ordered Customs and Border Protection in March 2026 to refund certain IEEPA tariffs. Certain third-party suppliers importing for IPL and WPL may be eligible for refunds. At September 30, 2026, the companies concluded recovery of certain tariff costs was probable and recorded recoveries as reductions to previously capitalized construction costs for energy storage facilities. Alliant Energy received cash proceeds related to the recoveries in October 2026; the filing text provided does not show the dollar amounts.

Key facts

• At September 30, 2026, Alliant Energy’s energy storage construction costs included tariff cost recoveries deemed probable; Alliant Energy received cash proceeds related to those recoveries in October 2026.