Northwestern Energy Group, Inc. · NASDAQ:NWE
Northwestern Energy — Investor Presentation (June 2026)
52 slides from Northwestern Energy's investor presentation, Jun 2, 2026
Slide 1: Investor Update June 2026
Investor Update 8-K Date: June 2, 2026 June 2026 ** TABLE COPY ** TABLE COPY ** TABLE COPY ** TABLE COPY ** TABLE COPY ** TABLE COPY ** Hauser Dam near Helena, Montana
Slide 2: Forward-Looking Statements
Forward-Looking Statements 2 Information in this communication, other than statements of historical facts, may constitute forward-looking statements, within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These
Slide 3: NorthWestern Energy Group, Inc. contact information
NorthWestern Energy Group, Inc. dba: NorthWestern Energy Ticker: NWE (Nasdaq) www.northwesternenergy.com Corporate Support Office 3010 West 69th Street Sioux Falls, SD 57108 (605) 978-2900 Director - Corporate Development & Investor Relations Officer Travis Meyer 605-978-2967 travis.meyer@northweste
Slide 4: Overview
Thank youOverview 4
Slide 5: NWE – An Investment for the Long Term
NWE – An Investment for the Long Term 5 • Recent rate reviews aid earnings, cash flow, and balance sheet strength • NOLs and tax credits expected to mitigate future cash tax obligations into 2029 • History of consistent annual dividend growth • 100% pure electric and natural gas utility with over 10
Slide 6: About NorthWestern
About NorthWestern 6 Montana Operations Electric 440,700 customers 25,542 miles – transmission & distribution lines 1,660 MW maximum capacity owned power generation Natural Gas 249,400 customers 8,072 miles of transmission and distribution pipeline 17.85 Bcf of gas storage capacity Own 25.3 Bcf of p
Slide 7: The NorthWestern Value Proposition
8% to 10% Total Return >10% Total Return Incremental Opportunities: > 6% EPS Growth Approximately 4% Dividend Yield Base Capital Plan: 4% to 6% EPS Growth ✓ Data centers & new large- load opportunities ✓ FERC Regional Transmission ✓ Incremental generating capacity (subject to successful resource pro
Slide 8: A Diversified Electric and Gas Utility
A Diversified Electric and Gas Utility 8 NorthWestern’s ‘80/20’ rules: Approximately 80% Electric and 80% Montana. Nearly $5.6 billion of rate base investment to serve our customers. Data as reported in our 2025 10-K
Slide 9: Highly Carbon-Free Supply Portfolio
Highly Carbon-Free Supply Portfolio Based upon 2025 MWh’s supplied from owned and long-term contracted resources. Approximately 52% of our total company owned and contracted supply is carbon-free – better than the national average of ~42% in 2025. (eia.gov table 7.2b) Contracted energy from Colstrip
Slide 10: Strong Utility Foundation
Strong Utility Foundation 10 (1) NWE rates are an average for 2025 - total residential revenues divided by total residential loads delivered. Electric source: U.S. EIA - Average Retail Price of Electricity, Annual for 2025. Natural Gas source: U.S. EIA - U.S. Price of Natural Gas Delivered to Reside
Slide 11: Solid Economic Indicators
Solid Economic Indicators 11 • Customer growth rates historically exceed National Averages. • Projected population growth in Montana & South Dakota better than National Average. • Unemployment rates better than National Average. *In 2025, we changed the methodology for counting our Lighting customer
Slide 12: NorthWestern's Combo Advantage
• Investment in production*, transmission, & distribution • Extreme winters necessitate economical gas heating • Energy Choice (Ban the Ban) laws in MT, SD, & NE • Access to low & less volatile natural gas pricing • AECO & Henry Hub (Ventura) *Proven and producing reserves only (no exploration) Nort
Slide 13: Natural Gas LDC – AECO Advantage to Customers
Natural Gas LDC – AECO Advantage to Customers 13 Natural gas is one of the most affordable energy sources, and NWE has access to some of the lowest and most stable natural gas prices in the nation through the Alberta Energy Company (AECO) and Henry trading hubs. Source: S&P Capital IQ Pro We have fa
Slide 14: Best Practices Governance
Best Practices Governance 14 America’s Most Responsible Companies Recognized by Newsweek as one of the most responsible companies in 2023. One of only eleven EEI member utilities selected. Board of Directors Executive Team 5th Best Score Among 50 Publicly Traded North American Utility and Power Comp
Slide 15: Affordability
15 Affordability Left: Over the last ten years, NWE typical residential bills have increased less than the national average for household energy and in line with - or below - the Consumer Price Index. Right: NWE’s residential electric and natural gas rates are significantly below the national averag
Slide 16: Merger and Financial Updates
Thank youMerger a d Financial Updates 16
Slide 17: Merger with Black Hills Benefits Stakeholders
17 Merger with Black Hills Benefits Stakeholders Strategic combination represents a highly attractive value creation opportunity for both companies. Increases Scale Position and Growth Increases the combined company target EPS growth rate to 5-7%, supported by the doubling of each company’s rate bas
Slide 18: Merger with Black Hills Timeline
Merger with Black Hills Timeline 18 ✓ Filed joint applications for approval in Montana, Nebraska, and South Dakota in Q4 2025 ✓ Nebraska hearing held on April 7, 2026; unanimous approval of settlements received on May 19, 2026 ✓ Settlements reached with certain key intervenors in Montana and South D
Slide 19: Credit, Cash Flow, and Financing Plans
Credit, Cash Flow, and Financing Plans 19 FFO: Cash from Operations less Working Capital Adjustments. Debt: Long- & Short-term Debt (including unamortized debt issuance costs and pension liability). Targeting FFO-to-Debt above 14% to support credit ratings. No equity anticipated to fund 2026 capital
Slide 20: Affirming 2026 Non-GAAP EPS Guidance
20 Affirming 2026 Non-GAAP EPS Guidance of $3.68 - $3.83 per diluted share ✓ Affirming long-term growth rate from 2024 base1 • EPS growth of 4% to 6% • Rate base growth of 4% to 6% • Continued focus on closing the gap between earned & authorized returns ✓ $3.2 billion 5-year capital plan including a
Slide 21: Track Record of Growing Capital Investment
Track Record of Growing Capital Investment 21 $2.72 Billion invested over the last 5 years* $3.21 Billion forecasted over the next 5 years** * Historical Capital Investment includes property, plant, and equipment additions and AFUDC Credit, both from our cash flow statement, and change in capital ex
Slide 22: Solid Balance Sheet
Solid Balance Sheet 22 Investment grade credit ratings, liquidity significantly greater than our $100 million target, debt to capitalization within our targeted 50%-55% range, and a manageable schedule of debt maturities. Target: 50% - 55% - Annual ratio based on average of each quarter's debt/cap r
Slide 23: Disciplined Expense Program
23 Disciplined Expense Program Per Customer… Per Employee… Per Rate Base… NorthWestern ranks favorably among our regional peers for electric expense efficiency. Source: FERC Form 1 Reports - 2025 expenses through S&P Capital IQ Pro, company 10-Ks, and company investor presentations. Non-Fuel O&M and
Slide 24: Other Updates
Thank youOther Updates 24
Slide 25: Data Center Process (Montana & South Dakota)
25 Data Center Process (Montana & South Dakota) Data Center Request • Load & Location • Supply Potential • Customer/Developer Required Timing Queue Count: 8 High-Level Assessment • Viability Assessment • Southwest Power Pool Screening • High Level Cost Estimate Queue Count: 4 Energy Service Agreemen
Slide 26: Large-Load Customers
✓ Montana ▪ Expected to be served by overall utility portfolio, which is long capacity beginning in 2026 ▪ Diversified and highly carbon-free generating portfolio ▪ Submitted a Large New Load tariff rule proposal with the MPSC in March 2026 ✓ South Dakota ▪ Significant indications of interest ▪ Any
Slide 27: Colstrip Transaction Overview
Colstrip Transaction Overview 27 Announcement: Effective Date: Capacity: Acquisition Price: Status Update: Puget July 2024 December 31, 2025 370 MW (185 MW each of units 3 & 4) $0.0 Signed contract in October 2025 to sell the dispatchable capacity and associated energy through late 2027. Revenue fro
Slide 28: Colstrip Facility Ownership Overview
Colstrip Facility Ownership Overview 28 As of January 2026, we own 55% of Colstrip Units 3 & 4. This allows us to guide investments in operation and maintenance in providing on- demand, 24/7 cost-effective generation for our Montana customers until a viable equivalent, carbon-free energy resource is
Slide 29: Regional Transmission Opportunities
29 Regional Transmission Opportunities Colstrip Transmission System North Plains Connector (NPC) Consortium Project • Approximately $6 billion, 425-mile, 525kv high-voltage direct-current transmission line connecting to Montana's Colstrip substation, bridging the eastern and western U.S. energy grid
Slide 30: South Dakota Wildfire Bill
30 South Dakota Wildfire Bill No Strict Liability: • Strict liability cannot be applied to utility operations alleged to have caused wildfire-related damages Legal Protections for Providers: • Rebuttable presumption that a valid and current wildfire mitigation plan is reasonable preparation for, and
Slide 31: NorthWestern Wildfire Mitigation Plan
NorthWestern Wildfire Mitigation Plan 31 Reduction of Ignition Potential System and Environmental Monitoring Enhanced Vegetation Maintenance Enriched Public Communication and Outreach ✓ Comprehensive summary of robust wildfire mitigation activities ✓ MT plan approved in November 2025 and to be filed
Slide 32: NorthWestern Public Safety Power Shutoff Plan
NorthWestern Public Safety Power Shutoff Plan Communication to Stakeholders at each Situation Weather / Environment + System Performance + Customer / Community Impact = Determines PSPS Event PSPS Decision Process 32 PSPS Guiding Principles: • Uphold our commitment to sustainable, affordable, and rel
Slide 33: Conclusion
Conclusion 33 Pure Electric & Gas Utility Solid Utility Foundation Best Practices Corporate Governance Attractive Future Growth Prospects Strong Earnings & Cash Flows The pending merger with Black Hills Corporation will combine the strengths of both companies, resulting in an organization with great
Slide 34: Appendix
Thank youAppendix 34
Slide 35: Regulated Utility Five-Year Capital Plan
Highly diversified, executable, and low-risk critical capital investment plan. Regulated Utility Five-Year Capital Plan (millions) 35 Appendix
Slide 36: Rate base and authorized returns by jurisdiction
(1) The revenue requirement associated with the FERC regulated portion of Montana electric transmission and ancillary services are included as revenue credits to our MPSC jurisdictional customers. Therefore, we do not separately reflect FERC authorized rate base or authorized returns. (2) The Montan
Slide 37: 2025 System Statistics
2025 System Statistics 37 Note: Statistics above are as of 12/31/2025, including 592 MW of Colstrip generation supply acquired 1/1/2026. (1) Nebraska is a natural gas only jurisdiction (2) Dave Gates Generating Station (DGGS) in Montana is a 150 MW nameplate facility, but we consider it a 105 MW (60
Slide 38: Timeline of Montana Generation Portfolio
Timeline of Montana Generation Portfolio Since 2011, we have added approximately 1,716 MW, both owned and long-term contracted, to our generation portfolio, of which 949 MW (~55%) is from carbon-free resources. Appendix 38
Slide 39: Comparison of Installed Capacity
Comparison of Installed Capacity 39 California is dealing with significant capacity issues DESPITE having a greater amount of dispatchable generation and fewer renewables than NorthWestern Energy in Montana (as a percentage of the total). Source: EIA.gov – 2024 Form EIA-860 - Schedule 3.1 for calend
Slide 40: EPS & Dividend History
EPS & Dividend History 40 2010-2025 CAGR’s: GAAP EPS: 2.1% Non-GAAP EPS: 3.7% Dividend: 4.5% See “Non-GAAP Financial Measures” slide in appendix. Appendix
Slide 41: Wildfire Relative Risk Assessment
• Hardening as needed • Normal assessments • Lower environmental monitoring • All hardening strategies • Maximum assessments • Highest environmental monitoring Wildfire Relative Risk Assessment MT Distribution MT Transmission Based on 2025 Montana model. Does not include CTS. *Percentages shown in q
Slide 42: Electric Wallet Share
Electric Wallet Share Appendix 42
Slide 43: Natural Gas Wallet Share
Natural Gas Wallet Share Appendix 43 Note: Montana typical bill is based on 65 therms which translates to ~0.50% lower wallet share than pictured. For consistency with South Dakota and Nebraska, 100 therms is used for Montana in this illustration. Oct. - Sept. Fiscal Year
Slide 44: Affordability – Residential Electric Rates by State
Affordability – Residential Electric Rates by State Appendix 44 Data from Charles River Associates "Retail Rate Trends in the U.S.", February 2, 2026, authors: Matthew DeCourcey and Mayank Saraswat via EIA 861M reports looking at 5-year change in residential electric rates taking trailing twelve mon
Slide 45: Experienced and Engaged Board of Directors
Experienced and Engaged Board of Directors 45 Linda Sullivan Board Chair Dave Goodin Director Sherina Maye Edwards Director Brian Bird Director, President & Chief Executive Officer Britt Ide Director Kent Larson Director Mahvash Yazdi Director Jeffrey Yingling Director Compensation (Chair), Operatio
Slide 46: Strong Executive Team
Strong Executive Team 46 Crystal Lail VP & Chief Financial Officer Shannon Heim General Counsel & VP – Federal Government Affairs Brian Bird President & Chief Executive Officer Bleau LaFave VP – Asset Management & Business Development Jason Merkel VP - Distribution Bobbi Schroeppel VP – Customer Car
Slide 47: Our Commissioners
Our Commissioners 47 Appendix
Slide 48: Weather impact and non-GAAP adjustments
We estimate weather to be a $14.4 million pre-tax detriment as compared to normal, and a $16.6 million detriment as compared to first quarter 2025. (1) As a result of the adoption of Accounting Standard Update 2017-07 in March 2018, pension and other employee benefit expense is now disaggregated on
Slide 49: Non-GAAP Financial Measures
Non-GAAP Financial Measures 49 Appendix Pre-Tax Adjustments ($ Millions) 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 Reported GAAP Pre-Tax Income 156.5$ 176.1$ 178.3$ 182.2$ 144.2$ 190.2$ 182.4$ 201.6$ 214.7$ 187.6$ Non-GAAP Adjustments to Pre-Tax Income: Weather 15.2 (3.4) (1.3) (7.3) 9.8 1.1
Slide 50: Non-GAAP Financial Measures
Non-GAAP Financial Measures This presentation includes financial information prepared in accordance with GAAP, as well as other financial measures, such as Utility Margin, Adjusted Non-GAAP pretax income, Adjusted Non-GAAP net income and Adjusted Non-GAAP Diluted EPS that are considered “non-GAAP fi
Slide 51: Additional Merger Related Disclosures
Additional Merger Related Disclosures 51 Appendix No Offer or Solicitation This document is for informational purposes only and is not intended to and shall not constitute an offer to buy or sell or the solicitation of an offer to buy or sell any securities, or a solicitation of any vote or approval
Slide 52: Thank you
Thank youDelivering a bright future 52
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