• Alliant Energy reaffirmed 2026 ongoing EPS guidance of $3.36-$3.46.
• Long-term ongoing EPS growth target maintained at 5%-7%+, projecting results at or above the high end in 2027-2029.
• Four-year 2026-2029 capital plan set at $13.4 billion, supported by about 12% investment growth in rate base plus construction work in progress; $2.4 billion of equity supports the plan with $1 billion still to be raised through 2029.
• Forecast 2026 capital expenditures of about $3 billion, weighted to the second half; average construction work in progress balances expected at $2 billion.
• 2026 assumptions include about 1% retail sales growth, operating and maintenance expense up 2%-4%, effective tax rate of about 29%.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Alliant Energy Corporation published the original content used to generate this news brief on May 17, 2026, and is solely responsible for the information contained therein.