ALLIANT ENERGY CORP (LNT) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-04-10 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ALLIANT ENERGY CORP (LNT) CIK: 0000352541 --- Reporting Owner --- Name: Cox Stephanie CIK: 0001463371 Role: Director --- Derivative Transactions --- [Transaction #1] Security: Deferred Common Stock Units Date: 2026-04-10 | Code: A (Grant or award) Shares: +547.196 | Price: $73.10 Shares Owned After: 17,253.451 | 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 (2026-04-14)