ALLIANT ENERGY CORP (LNT) Institutional Ownership and Insiders Activity

ALLIANT ENERGY CORP (LNT) is widely held by institutional investors, with 3 tracked firms reporting positions valued at approximately $260.03M based on SEC Form 13F filings for the quarter ended June 30, 2026.

Mairs & Power Growth Fund is the largest disclosed holder, reporting approximately $207.32M in LNT holdings in its latest filing.

Institutional ownership among tracked investors remains highly concentrated, with Mairs & Power Growth Fund representing the majority of disclosed value.