Cortina Ignacio A 4

What Happened

• Ignacio A. Cortina, a director of Alliant Energy Corp (LNT), was granted 666.895 derivative units on 2026-04-10. The grant price used for reporting was $73.10 per share, valuing the award at approximately $48,750. This transaction is coded as an award/grant (A) rather than an open-market purchase or sale.
• These are derivative units (not immediately tradable shares) that, per the filing, are to be settled in common stock upon the reporting person’s termination of director services.

Key Details

• Transaction date and price: 2026-04-10 at $73.10 per share (total reported value ~$48,750).
• Transaction type: A = Award/Grant of derivative units.
• Shares owned after transaction: Not specified in the Form 4 provided.
• Footnotes:
  • F1: Units will be settled in shares of common stock when Cortina’s service as a director ends.
  • F2: The reported amount includes adjustments for accrued dividends under a dividend reinvestment arrangement exempt under Rule 16a-11.
• Filing timeliness: Reported on 2026-04-14 for a 2026-04-10 transaction — filed within the SEC’s two-business-day window (timely).

Context

• This is a routine director compensation award (derivative units converting to stock upon termination) rather than a market purchase or sale. Such grants compensate service as a director and do not necessarily signal a personal buy/sell decision.