Alliant Energy : EEI Finance Conference Presentation

LNT

Alliant Energy Corporation

EEI Finance Conference

November 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 September 30, 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 references to ongoing earnings, which is a non-GAAP financial measure. The reconciliations between ongoing earnings and the GAAP measure are provided in this presentation. Ongoing earnings refers to non-GAAP diluted earnings per share.

2

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

3

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 customer base

In industries resilient during economic downturns

Top tier reliability

27% of distribution is underground

Over 3 GW of renewable resources

Strong economic development program to attract customers

4

Consistent Track Record of Shareowner Return

LNT in S&P's High Yield Dividend Aristocrats Index

$3.00

$2.00

$1.00

$0.00

2016 2017 2018 2019 2020 2021 2022 2023 2024E 2025E

Ongoing EPS Dividends

Ongoing EPS ~6% CAGR over the past 10 years

Dividends ~6% CAGR, consistent 60-70% payout ratio

2024 ongoing earnings guidance as of October 31, 2024 Reflects expected dividend declarations in 2025

5

Alliant Energy: Well-Positioned for Growth

Advancing economic development

Competitive advantages include:

Flexible resource planning

Non-litigated process enabling growth in tandem with our customers:

Constructive jurisdictions

Regulatory frameworks aligned for growth

6

ADVANCING ECONOMIC DEVELOPMENT

7

Relentlessly Building for the Future

Flexible planning for growth, driving affordability and rate base growth

Opportunities at Additional Sites

(not in capex plan)

Future Phases of

Big Cedar Site

(not in capex plan)

Phase 1 of Big

Cedar Site -

1.1GWs

(in capex plan)

Planning for Capacity Expansion

3,000

(MW)

2,500

2,000

Megawatts

1,500

1,000

500

0

2025

2026

2027

2028

2029

2030

2031

2032

Phase 1 (in plan)

Future Phases

Opportunity

Load expectations in plan

3-5%

Electric Sales

Growth CAGR

in plan over

2024-2032

In October 2024, MISO approved ITC transmission upgrades to serve up to 1.6 gigawatts of new data center load at Big Cedar. Requires IUC franchise approval prior to construction

Our flexible resource planning process enables us to pivot to growth scenarios without the need for additional studies

Planning for growth beyond initial phase of Big Cedar Site - expect to announce investments in the future

8

Data Centers - Mitigating Risk

Ensuring benefits for all customers

Individual contract rates

Protection for other customers and company

9

FLEXIBLE RESOURCE PLANNING

& CAPITAL PLANS

10

Disclaimer

Alliant Energy Corporation published this content on November 10, 2024, and is solely responsible for the information contained herein. Distributed by Public, unedited and unaltered, on November 10, 2024 at 20:06:07.721.