Alliant Energy Corporation

AMERICAN GAS ASSOCIATION

May 2024

SAFE HARBOR

This presentation contains statements that may be considered forward looking statements, such as management's expectations of financial objectives and projections, earnings guidance, capital expenditures, future investment opportunities, earnings growth, plant retirements, emission reduction goals, rate base growth, financing plans, tax credit generation and monetization, regulatory plans and new generation plans. These statements speak of the Company's plans, goals, beliefs, or expectations. Actual results could differ materially, because the realization of those results is subject to many uncertainties including regulatory approvals and results, unanticipated construction costs or delays, economic conditions in our service territories, weather, and other factors, some of which are discussed in more detail in the Company's Form 10-K for the year ended December 31, 2023 and Form 10-Q for the quarter ended March 31, 2024. All forward-looking statements included in this presentation are based upon information currently available unless otherwise noted and the Company assumes no obligation to update any forward- looking statements.

In addition, this presentation contains non-GAAP financial measures. The reconciliations between the non-GAAP and GAAP measures are provided in this presentation. Adjusted EPS, the term utilized throughout this presentation, refers to Non-GAAP temperature normalized earnings per share.

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ALLIANT ENERGY: AT A GLANCE

Our purpose: Serve customers and build stronger communities

>95% earnings From regulated operations

1 million electric customers 425,000 gas customers

3,000+ dedicated employees

$13.3 billion

13-month average

2023 rate base

Alliant Energy leads regulated, owned & operated renewable energy

3rd largest regulated wind owner-operator

Top 5 largest regulated solar owner-operator

~30% of 2023 year-endrate base comprised from regulated owned renewables

~40% of energy from renewable resources in 2023

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ALLIANT ENERGY: INVESTMENT THESIS

Unlocking Growth, Reliability & Customer Value

Constructive

Consistent financial track record

Low risk of catastrophic

regulatory

14 consecutive years of

events in the states we

environments

achieving 5-7% earnings growth

operate

Strong Balance Sheet No material new equity required

Top tier reliability

27% of distribution is underground

Over 3 GW of renewable resources

Strong economic development program to attract customers

4

CONSISTENT EARNINGS AND DIVIDEND GROWTH

$3.00

$2.00

$1.00

$0.00

Adjusted EPS

Dividends

Adjusted EPS ~6% CAGR, over the past 10 years Dividends ~6% CAGR, consistent 60-70%payout ratio

2024 earnings guidance as of May 2, 2024

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LEADER IN CORPORATE RESPONSIBILITY

Environmental

  • Net-zerogreenhouse gas emissions by 2050
  • Climate report validates our environmental goals are consistent with the Paris Climate Agreement
  • ~40% of current capex plan attributable to renewables and battery storage investments

Social

  • Halfway toward goal of planting 1 million trees
    - one tree for each electric customer
  • Provided $11 million in community giving and over 72,000 volunteer hours in 2023
  • Partnering with universities to study agrivoltaics - the use of land for both solar panels and agriculture

Governance

• Lead independent director with clearly defined and robust responsibilities

• Strong linkage of compensation to achievement of financial, customer focused and ESG-related goals

• Annual board self-assessments

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Why Iowa & Wisconsin are attractive to businesses:

  • Top tier clean energy & reliability​
  • Economically strong​
  • Skilled workforce​
  • Enabling incentive rate structures​
  • Non-litigatedresource planning = flexibility​
  • Investment incentives in certified sites (Iowa)​
  • Tax rate expected to drop to 5.5%​(Iowa)
  • Sales & use tax exemption for data centers (Wisconsin)

BUILDING STRONGER COMMUNITIES

IN BUSINESS-FRIENDLY STATES

Recent economic development announcements include diverse customers, load growth

Food Products

Healthcare

Services

Manufacturing

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NEW LEGISLATION IN IOWA, WISCONSIN

Positions states for accelerated economic development

In Iowa:

In Wisconsin:

Major Economic Growth Attraction Program provides incentives to attract

large businesses:

  • Committed to creating jobs
  • Investing in Iowa
  • Prepared to locate at growth ready, certified industrial sites

New technologies (energy storage & nuclear) now eligible for advanced ratemaking

  • Creates greater certainty and transparency on important, future customer investments

Sales and use tax exemption for data centers

  • Provides another tool for the state and utilities to use when promoting economic development

Electric vehicle bill gets more fast chargers along major thoroughfares more economically

  • Increases driver confidence a charge will be available when and where needed

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CUSTOMER FOCUSED INVESTMENTS

Support Reliability, Resiliency, Security and Sustainability while keeping Customer Affordability top of mind

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GENERATING 1 GIGAWATT OF SOLAR ENERGY

Alliant Energy largest owner-operator of solar in Wisconsin

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Disclaimer

Alliant Energy Corporation published this content on 19 May 2024 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 19 May 2024 14:49:10 UTC.