Alliant Energy (LNT) official guidance

| Total Capital Expenditures | $3,130 | $3,580 | $3,625 | $3,065 |

| Total Capital Expenditures | $2,470 | $3,045 | $3,665 | $3,795 | $2,905 |

| Total Capital Expenditures | $3,130 | $3,580 | $3,625 | $3,065 |

| Total Capital Expenditures | $2,470 | $3,045 | $3,665 | $3,795 | $2,905 |

| Total Capital Expenditures | $3,130 | $3,580 | $3,625 | $3,065 |

| Total Capital Expenditures | $2,470 | $3,045 | $3,665 | $3,795 | $2,905 |

| Total Capital Expenditures | $3,130 | $3,580 | $3,625 | $3,065 |

| Total Capital Expenditures | $2,470 | $3,045 | $3,665 | $3,795 | $2,905 |

•Consolidated effective tax rate of (35%)

Consolidated effective tax rate of (29%)

•Consolidated effective tax rate of (30%)

Alliant Energy is reaffirming its consolidated ongoing EPS guidance for 2026 of $3.36 - $3.46 per diluted share.

Alliant Energy reaffirmed its consolidated ongoing EPS guidance for 2026 of $3.36 - $3.46, continuing its over a decade strong track record of compound annual earnings growth of more than 6%.

Alliant Energy affirmed its consolidated ongoing EPS guidance for 2026 of $3.36 - $3.46, continuing its over a decade strong track record of compound annual earnings growth of more than 6%.

Alliant Energy is issuing consolidated ongoing EPS guidance for 2026 of $3.36 - $3.46, which at the midpoint represents 6.6% growth over 2025.

As previously announced, our efforts to date have resulted in an expectation of driving a 60% increase in our demand by 2031 through five executed electric service agreements with large load customers.

•Expected 60% load growth by 2031, large customer load expected to materialize as forecasted in 2026

Our remaining 2026 debt financing plans include up to $800 million of long-term issuances, consisting of up to $300 million at WPL and up to $500 million at IPL.

Turning to financing, as shown on slide 8, our 2026 debt financing plans include up to $1.2 billion of long-term issuances, consisting of up to $400 million at the parent or Alliant Energy Finance, up to $300 million at WPL, and up to $500 million at IPL.

Our remaining 2026 debt financing plans include up to $800 million of long-term issuances, consisting of up to $300 million at WPL and up to $500 million at IPL.

Turning to financing, as shown on slide 8, our 2026 debt financing plans include up to $1.2 billion of long-term issuances, consisting of up to $400 million at the parent or Alliant Energy Finance, up to $300 million at WPL, and up to $500 million at IPL.

Our remaining 2026 debt financing plans include up to $800 million of long-term issuances, consisting of up to $300 million at WPL and up to $500 million at IPL.

Turning to financing, as shown on slide 8, our 2026 debt financing plans include up to $1.2 billion of long-term issuances, consisting of up to $400 million at the parent or Alliant Energy Finance, up to $300 million at WPL, and up to $500 million at IPL.

As shown on slide 14, our 2026 debt financing plans include up to $1.1 billion of long-term debt issuances, including up to $300 million at Alliant Energy Finance or parent, up to $300 million at WPL, and up to $500 million at IPL.

We are reaffirming our 2026 earnings guidance, with slide 6 reflecting several of our key 2026 assumptions. Our longer-term earnings outlook remains intact, and based on our current plan, we expect our compound annual earnings growth rate across 2027 through 2029 to be 7%+.

With respect to our longer-term outlook and incorporating QTS's new load expectations, we expect our compound annual earnings growth rate across 2027-2029 to be consistent with what we shared in November 2025, 7%+.

As shown on slide 8 of the approximately $2.4 billion of expected common equity needs over the next four years, we have already raised approximately $1.3 billion through forward equity agreements.

Of the approximately $2.4 billion of expected common equity needs over the four-year period, we have already raised approximately $1 billion through forward equity agreements.

This leaves approximately $1 billion of remaining equity to be raised through 2029, excluding equity expected to be raised under our share owner direct plan.

This leaves approximately $1.3 billion of remaining equity to be raised through 2029, excluding equity expected to be raised under our shareholder direct plan.