de Leon David A 4

What Happened

• David A. de Leon, Senior Vice President of Alliant Energy (LNT), was granted a total of 10,922 shares via awards (8,616 and 2,306 RSUs) on 2026-02-19 (acquired at $0.00). On the same date, 5,207 shares were disposed of at $70.01 per share to satisfy tax withholding obligations, netting $364,542 in value for the withheld shares. The RSUs are reported as awards (code A) and the withholding as code F (payment of tax liability).

Key Details

• Transaction date: 2026-02-19; Form 4 filed: 2026-02-23 (timely within the 2-business-day window).
• Grants: 8,616 RSUs and 2,306 RSUs acquired at $0.00 (total 10,922 RSUs).
• Withholding: 5,207 shares disposed at $70.01 each, total value $364,542, to cover taxes (code F).
• Shares owned after transaction: Not specified in the provided excerpt of the filing.
• Footnotes: F2—these are restricted stock units that convert 1:1 to common stock when vested; they vest on December 31, 2028. F1—amounts include adjustments for accrued dividends via a dividend reinvestment transaction exempt under Rule 16a-11. F3—note in filing reflects 401(k) holdings as of the filing date.
• Filing timeliness: Filed Feb 23 for Feb 19 transactions (within the typical 2-business-day requirement), so not marked late.

Context

• The awards are RSUs (not open-market purchases), so they represent compensation that will convert to stock when vested (vesting date given). The sale/disposal here is a routine tax-withholding event (code F) and is not the same as a voluntary open-market sale that might signal a view on the stock.