ALLIANT ENERGY CORP 4

Executive Vice President Antonio P. Smyth had 1,259 Alliant Energy Corp common shares withheld for taxes upon RSU vesting, leaving him with 20,678 shares owned directly.

On April 15, 2026, Executive Vice President Antonio P. Smyth of Alliant Energy Corp had 1,259 shares of common stock withheld by the company at an implied price of $72.18 per share to satisfy tax withholding obligations related to the vesting and settlement of restricted stock units, a non-discretionary event that does not constitute an open-market sale. Following this withholding, Smyth’s direct ownership stood at 20,678 shares of Alliant Energy common stock, with an estimated post-transaction holding value of approximately $1.49 million based on the indicated transaction price.

Filing Facts

CIK

352541

Ticker

LNT

Form

4

Source Type

sec

Accession

0001973120-26-000003

Alert Tier

5