Alliant Energy (LNT) 4: Cortina Ignacio A bought 823 shares at $65.85 on 2026-10-09 (Oct 14, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-10-09 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ALLIANT ENERGY CORP (LNT) CIK: 0000352541 --- Reporting Owner --- Name: Cortina Ignacio A CIK: 0001654634 Role: Director --- Derivative Transactions --- [Transaction #1] Security: Deferred Common Stock Units Date: 2026-10-09 | Code: A (Grant or award) Shares: +822.577 | Price: $65.85 Exercise Price: $0.00 Shares Owned After: 11,848.373 | Ownership: D (Direct) Footnotes: [F1] Units are to be settled in shares of common stock upon the reporting person's termination of services as a director. [F1] Units are to be settled in shares of common stock upon the reporting person's termination of services as a director. [F2] Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11. --- Footnotes (Complete Index) --- F1: Units are to be settled in shares of common stock upon the reporting person's termination of services as a director. F2: Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11. --- Signature --- /s/ /s/ Omar N. Chaudhary, Attorney-in-Fact (2026-10-14)