Alliant Energy (LNT) 4: DURIAN ROBERT J sold 0 shares at $68.60 on 2026-08-10; DURI… (Aug 12, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-10 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ALLIANT ENERGY CORP (LNT) CIK: 0000352541 --- Reporting Owner --- Name: DURIAN ROBERT J CIK: 0001512789 Role: Officer (EVP and CFO) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-08-10 | Code: S (Open market sale) Shares: -0.097 | Price: $68.60 Total Value: $6.65 Shares Owned After: 158,145.939 | Ownership: D (Direct) Footnotes: [F1] Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) Footnotes: [F2] Reflects 401(k) holdings as of this filing date. --- Footnotes (Complete Index) --- F1: Includes adjustments for accrued dividends, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11. F2: Reflects 401(k) holdings as of this filing date. --- Signature --- /s/ /s/ Omar N. Chaudhary, Attorney-in-Fact (2026-08-12)