Alliant Energy Director Ignacio A. Cortina Receives Deferred Stock Units

Executive Summary

On October 14, 2026, Alliant Energy Corp ($LNT) submitted a Form 4 detailing an acquisition of equity compensation by Director Ignacio A. Cortina. On October 9, 2026, Mr. Cortina acquired 822.577 Deferred Common Stock Units priced at $65.85 per unit, representing an aggregate value of approximately $54,166.70.

Transaction Breakdown

• Insider: Ignacio A. Cortina, Director
• Security: Deferred Common Stock Units (convertible into common stock upon termination of board service)
• Transaction Code: 'A' (Grant, award, or other acquisition under an employee/director plan)
• Volume & Valuation: 822.577 units at a reference price of $65.85 per share (~$54,166.70 total value)
• Post-Transaction Holdings: 11,848.373 deferred stock units, held directly (inclusive of dividend reinvestment adjustments)

Market Impact & Significance

This transaction carries Low trading significance. It reflects standard non-employee director compensation credited in the form of deferred stock units rather than discretionary open-market buying or selling activity.