Otter Tail : First Quarter 2026 Earnings Conference Call Presentation

OTTR

Published on 05/05/2026 at 12:15 pm EDT

Q1 2026

ELECTRIC

Founded in 1907

Serve approximately

134,000 customers in MN, ND, SD

Regulated and vertically

integrated electric utility

MANUFACTURING

Owned and operated for over 20 years

Diverse end-markets High utilization of asset base

Investment Thesis

Best in class utility:

Strong EPS growth and low customer rates

1

Strategic diversification: Enhances consolidated ROE and cash flow

2

Internally financed growth: No external equity needs at least through 2030

3

Financial Results

Produced diluted EPS of $1.73

ROE of 15% (trailing twelve months) on an equity layer of 61%

Positioned for Future Growth

Completed fully settled South Dakota rate case

Implemented interim rates for Minnesota rate case

Completed wind repowering project

Procured solar panels for solar development projects, eliminating tariff risk

Completed Phase 2 of Vinyltech expansion project

2026 Outlook

Affirming 2026 earnings guidance of $5.22 to $5.62

$ in millions, except per share data

Quarter-to-Date

Net Income Diluted EPS

$68.1

$72.6

$1.62

7%

$1.73

Affirming 2026 EPS Guidance

Guidance Midpoint: $5.42

Projected ROE: 12%

Electric segment earnings growth: 14%

Q1 2025 Q1 2026 Q1 2025 Q1 2026

Docket EL25-022

Last rate request filed in 2018

Requested:

Net revenue increase of $5.7M

ROE of 10.8%

Equity layer of 53.54%

Final rates implemented on April 1, 2026

SD Public Utilities Commission Approval of Settlement Stipulation

March 2026

Net revenue increase:

$3.3M

(7.7% increase)

Return on rate base:

7.09%

ROE and capital structure:

Blackbox

Final outcome achieved 58% of request; increases to ~ 75% after considering adjustments for rider treatment

Docket 25-359

Last rate request filed in 2020

Interim rate revenue of $28.6 million went into effect January 1, 2026, subject to refund

Final rate implementation expected in the second half of 2027

Request Filed with the Minnesota Public Utilities Commission

October 2025

Net revenue increase:

$44.8M

(17.7% increase)

ROE:

10.65%

(existing 9.48%)

Equity layer:

53.5%

(existing 52.5%)

Significant Rate Base Growth

$ in billions

10%

CAGR

$3.42

$3.11

$3.26

$2.77

$2.40

$2.11

Conversion of rate base growth into Electric EPS growth

of our capital investment is expected to be recovered through riders and existing rates

2025 (A) 2026 (F) 2027 (F) 2028 (F) 2029 (F) 2030 (F)

Solway Solar

Est. investment:

$80M

Est. completion date:

2026-2027

Recovery mechanism: Approved riders in MN and SD

Abercrombie Solar

Est. investment:

$450M

Est. completion date:

2028

Recovery mechanism: Approved riders in MN and SD

Hoot Lake Battery

Est. investment:

$120M

Est. completion date:

2028

Recovery mechanism:

Approved rider

in MN

MISO LRTP1

Tranche 1

Est. investment:

$475M

Est. completion date:

2030

Recovery mechanism: MISO tariff with state riders

MISO LRTP

Tranche 2.1

Est. investment:

$800M - $1B

Est. completion date:

2034

Recovery mechanism: MISO tariff with state riders

JTIQ2

Est. investment:

$450M - $500M

Est. completion date:

2034

Recovery mechanism: MISO tariff with generator payments

1 Long Range Transmission Plan 11

2 Joint Targeted Interconnection Queue

Well positioned to attract large loads

Attractive service territory - low market energy prices and high renewable production

Locations identified with minimal delivery costs to site

Load growth opportunity driven by

Data centers

Crypto mining

Clean fuel

Agriculture processing

Benefits of adding large loads

Spreads out fixed costs, benefitting existing customers

Capital investment and earnings opportunity

Phases to Secure Large Load

Existing Opportunity

Letter of Intent

1

1,050 MW

Term Sheet

2

0 MW

Electric Service Agreement

3

0 MW

Phase 1 and 2 large load additions not included in load growth or capex forecast

12

Proven Track Record Looking Ahead

Our Electric Rates Compared to Regional and National Averages1

5-Year

2021 2022 2023 2024 2025

CAGR

(15)%

(12)%

(14)%

(16)%

(19)%

Rate Base Growth 10%

Net MISO system-wide recovery

3 - 4%

Renewable energy tax credits

2 - 3%

Other (reduced energy costs, load growth, etc.)

0 - 1%

Affordability enablers:

(23)% (23)%

Otter Tail Power's 2025 rates: 19% below regional average 34% below national average

(29)% (30)%

(34)%

Estimated Customer Bill Impact 3 - 4%

Expected customer bill CAGR may vary by state and could be impacted by external factors, including market energy prices

1 Source: Edison Electric Institute, Typical Bills and Average Rates Report, Summer Residential Rates 13

BTD Manufacturing and T.O. Plastics

Industries Served Industry Conditions

Recreational Vehicle Lawn & Garden Construction Agriculture Industrial Horticulture

Dealer inventory levels have largely normalized

Agriculture industry conditions remain challenging due to weak farm economy

Long-term fundamentals remain strong

Northern Pipe Products and Vinyltech Corporation

Historical Average Sales Price of PVC Pipe1 2026 Year-Over-Year Trends1

PVC pipe prices have steadily declined since late 2022

2019 2020 2021 2022 2023 2024 2025

2026

Average Sales Prices Sales Volumes Material Input Costs

Q1

↓ 19%

↓ 12%

1 Internal sales pricing, volumes and material costs only 16

$1.62

$0.04

$1.73

$(0.24)

$0.25 $0.06

Q1 2025 Electric Manufacturing Plastics Corporate Q1 2026

Segment Level Detail

$0.59

$0.06

$(0.03)

$(0.02)

$(0.05)

$0.23

$0.02 $0.04 $0.84

Electric

Q1

Sales

Weather

Electric Rates

O&M

Depreciation

AFUDC

Other

Q1

2025

Volume

& Rider

Expense

Expense

2026

Revenue

$0.02

$0.05

$0.10

$0.02 $(0.03)

$0.04

Manufacturing

Q1

2025

Sales

Volume

Product Pricing

and Mix

Production

Cost

SG&A

Expense

Q1

2026

Segment Level Detail

$0.07

$0.79

$(0.37)

$(0.02)

Plastics

$1.03 $0.08

Q1 2025

Sales Volume

Product Pricing

Material Cost

Other Manufacturing Costs

Q1 2026

Corporate

$(0.04)

$(0.01)

$0.01

$0.00

$0.04

Q1

2025

SG&A

Expense

Investment

Income

Income Tax

Benefit & Other

Q1

2026

Disclaimer

Otter Tail Corporation published this content on May 05, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on May 05, 2026 at 16:12 UTC.