ALLETE has entered an agreement to be acquired by a partnership led by Canada Pension Plan Investment Board and Global Infrastructure Partners and start the process to become a private company. Learn more at www.ALLETEforward.com.
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 10-Q
(Mark One)
Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
For the quarterly period ended March 31, 2024
or
Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
For the transition period from ______________ to ______________
Commission File Number 1-3548
ALLETE, Inc.
(Exact name of registrant as specified in its charter)
Minnesota 41-0418150
(State or other jurisdiction of incorporation or organization) (IRS Employer Identification No.)
30 West Superior Street
Duluth, Minnesota 55802-2093
(Address of principal executive offices)
(Zip Code)

(218) 279-5000
(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading symbolName of each exchange on which registered
Common Stock, without par valueALENew York Stock Exchange
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes    No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes    No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
         Large Accelerated Filer                 Accelerated Filer    
         Non-Accelerated Filer             Smaller Reporting Company    
                             Emerging Growth Company    
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).   Yes    No

Common Stock, without par value,
57,666,069 shares outstanding
as of March 31, 2024




Index
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ALLETE, Inc. First Quarter 2024 Form 10-Q
2



Definitions

The following abbreviations or acronyms are used in the text. References in this report to “we,” “us” and “our” are to ALLETE, Inc., and its subsidiaries, collectively.
Abbreviation or AcronymTerm
AFUDCAllowance for Funds Used During Construction – the cost of both debt and equity funds used to finance regulated utility plant additions during construction periods
ALLETEALLETE, Inc.
ALLETE Clean EnergyALLETE Clean Energy, Inc. and its subsidiaries
ALLETE PropertiesALLETE Properties, LLC and its subsidiaries
ALLETE South WindALLETE South Wind, LLC
ALLETE Transmission HoldingsALLETE Transmission Holdings, Inc.
Alloy Merger SubAlloy Merger Sub LLC, a Delaware limited liability company and wholly owned subsidiary of Alloy Parent.
Alloy ParentAlloy Parent LLC, a Delaware limited liability company which, upon closing, will be jointly owned by a wholly owned subsidiary of Canada Pension Plan Investment Board and affiliates of investment vehicles affiliated with one or more funds, accounts, or other entities managed or advised by Global Infrastructure Management, LLC.
ATCAmerican Transmission Company LLC
BNI EnergyBNI Energy, Inc. and its subsidiary
BoswellBoswell Energy Center
CaddoALLETE Clean Energy’s Caddo Wind Energy Facility
CliffsCleveland-Cliffs Inc.
CompanyALLETE, Inc. and its subsidiaries
CSAPRCross-State Air Pollution Rule
Diamond SpringALLETE Clean Energy’s Diamond Spring Wind Energy Facility
ECOEnergy Conservation and Optimization Plan
EPAUnited States Environmental Protection Agency
ESOPEmployee Stock Ownership Plan
FERCFederal Energy Regulatory Commission
Form 10-KALLETE Annual Report on Form 10-K
Form 10-QALLETE Quarterly Report on Form 10-Q
GAAPGenerally Accepted Accounting Principles in the United States of America
GHGGreenhouse Gases
HVDCHigh-Voltage Direct-Current
IBEWInternational Brotherhood of Electrical Workers
Invest DirectALLETE’s Direct Stock Purchase and Dividend Reinvestment Plan
Item ___Item ___ of this Form 10-Q
kVKilovolt(s)
kWh
Kilowatt-hour(s)
LaskinLaskin Energy Center
Lampert Capital MarketsLampert Capital Markets, Inc.
MergerPursuant to the Merger Agreement, on the terms and subject to the conditions set forth therein, Alloy Merger Sub will merge with and into ALLETE (the “Merger”), with ALLETE continuing as the surviving corporation in the Merger and becoming a subsidiary of Alloy Parent.
Merger AgreementAgreement and Plan of Merger, dated as of May 5, 2024, by and among ALLETE, Alloy Parent, and Alloy Merger Sub.
Minnesota PowerAn operating division of ALLETE, Inc.
Minnkota PowerMinnkota Power Cooperative, Inc.
ALLETE, Inc. First Quarter 2024 Form 10-Q
3



Abbreviation or AcronymTerm
MISOMidcontinent Independent System Operator, Inc.
Moody’sMoody’s Investors Service, Inc.
MPCAMinnesota Pollution Control Agency
MPUCMinnesota Public Utilities Commission
MWMegawatt(s)
NAAQSNational Ambient Air Quality Standards
NDPSCNorth Dakota Public Service Commission
New EnergyNew Energy Equity LLC
Nippon SteelNippon Steel Corporation
Nobles 2Nobles 2 Power Partners, LLC
NOX
Nitrogen Oxides
Northshore MiningNorthshore Mining Company, a wholly-owned subsidiary of Cleveland-Cliffs Inc.
Note ___Note ___ to the Consolidated Financial Statements in this Form 10-Q
NPDESNational Pollutant Discharge Elimination System
NTECNemadji Trail Energy Center
PPA / PSAPower Purchase Agreement / Power Sales Agreement
PPACAPatient Protection and Affordable Care Act of 2010
PSCWPublic Service Commission of Wisconsin
SECSecurities and Exchange Commission
SO2
Sulfur Dioxide
SofidelThe Sofidel Group
Square ButteSquare Butte Electric Cooperative, a North Dakota cooperative corporation
South Shore EnergySouth Shore Energy, LLC
ST PaperST Paper LLC
SWL&PSuperior Water, Light and Power Company
Taconite HarborTaconite Harbor Energy Center
U.S.United States of America
USS CorporationUnited States Steel Corporation

ALLETE, Inc. First Quarter 2024 Form 10-Q
4



Forward-Looking Statements

Statements in this report that are not statements of historical facts are considered “forward-looking” and, accordingly, involve risks and uncertainties that could cause actual results to differ materially from those discussed. Although such forward-looking statements have been made in good faith and are based on reasonable assumptions, there can be no assurance that the expected results will be achieved. Any statements that express, or involve discussions as to, future expectations, risks, beliefs, plans, objectives, assumptions, events, uncertainties, financial performance, or growth strategies (often, but not always, through the use of words or phrases such as “anticipates,” “believes,” “estimates,” “expects,” “intends,” “plans,” “projects,” “likely,” “will continue,” “could,” “may,” “potential,” “target,” “outlook” or words of similar meaning) are not statements of historical facts and may be forward-looking.

In connection with the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, we are providing this cautionary statement to identify important factors that could cause our actual results to differ materially from those indicated in forward-looking statements made by or on behalf of ALLETE in this Form 10-Q, in presentations, on our website, in response to questions or otherwise. These statements are qualified in their entirety by reference to, and are accompanied by, the following important factors, in addition to any assumptions and other factors referred to specifically in connection with such forward-looking statements that could cause our actual results to differ materially from those indicated in the forward-looking statements:

our ability to successfully implement our strategic objectives;
global and domestic economic conditions affecting us or our customers;
changes in and compliance with laws and regulations or changes in tax rates or policies;
changes in rates of inflation or availability of key materials and supplies;
the outcome of legal and administrative proceedings (whether civil or criminal) and settlements;
weather conditions, natural disasters and pandemic diseases;
our ability to access capital markets, bank financing and other financing sources;
changes in interest rates and the performance of the financial markets;
project delays or changes in project costs;
changes in operating expenses and capital expenditures and our ability to raise revenues from our customers;
the impacts of commodity prices on ALLETE and our customers;
our ability to attract and retain qualified, skilled and experienced personnel;
effects of emerging technology;
war, acts of terrorism and cybersecurity attacks;
our ability to manage expansion and integrate acquisitions;
population growth rates and demographic patterns;
wholesale power market conditions;
federal and state regulatory and legislative actions that impact regulated utility economics, including our allowed rates of return, capital structure, ability to secure financing, industry and rate structure, acquisition and disposal of assets and facilities, operation and construction of plant facilities and utility infrastructure, recovery of purchased power, capital investments and other expenses, including present or prospective environmental matters;
effects of competition, including competition for retail and wholesale customers;
effects of restructuring initiatives in the electric industry;
the impacts on our businesses of climate change and future regulation to restrict the emissions of GHG;
effects of increased deployment of distributed low-carbon electricity generation resources;
the impacts of laws and regulations related to renewable and distributed generation;
pricing, availability and transportation of fuel and other commodities and the ability to recover the costs of such commodities;
our current and potential industrial and municipal customers’ ability to execute announced expansion plans;
real estate market conditions where our legacy Florida real estate investment is located may deteriorate;
the success of efforts to realize value from, invest in, and develop new opportunities;
the risk that Alloy Parent or ALLETE may be unable to obtain governmental and regulatory approvals required for the Merger, or that required governmental and regulatory approvals or agreements with other parties interested therein may delay the Merger, may subject the Merger to or impose adverse conditions or costs or may cause the parties to abandon the Merger; and
that the announcement and pendency of the Merger, during which the Company is subject to certain operating restrictions, could have an adverse effect on the Company’s businesses, results of operations, financial condition or cash flows.


ALLETE, Inc. First Quarter 2024 Form 10-Q
5



Forward-Looking Statements (Continued)

Additional disclosures regarding factors that could cause our results or performance to differ from those anticipated by this report are discussed in Part I, Item 1A. Risk Factors of our 2023 Form 10-K. Any forward-looking statement speaks only as of the date on which such statement is made, and we undertake no obligation to update any forward-looking statement to reflect events or circumstances after the date on which that statement is made or to reflect the occurrence of unanticipated events. New factors emerge from time to time, and it is not possible for management to predict all of these factors, nor can it assess the impact of each of these factors on the businesses of ALLETE or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statement. Readers are urged to carefully review and consider the various disclosures made by ALLETE in this Form 10-Q and in other reports filed with the SEC that attempt to identify the risks and uncertainties that may affect ALLETE’s business.
ALLETE, Inc. First Quarter 2024 Form 10-Q
6



PART I.  FINANCIAL INFORMATION

ITEM 1.  CONSOLIDATED FINANCIAL STATEMENTS

ALLETE
CONSOLIDATED BALANCE SHEET
Unaudited
March 31,
2024
December 31,
2023
Millions
Assets  
Current Assets  
Cash and Cash Equivalents$32.0 $71.9 
Accounts Receivable (Less Allowance of $1.7 and $1.6)
142.2 137.2 
Inventories – Net182.7 175.4 
Prepayments and Other76.3 83.6 
Total Current Assets433.2 468.1 
Property, Plant and Equipment – Net5,009.1 5,013.4 
Regulatory Assets409.0 425.4 
Equity Investments333.1 331.2 
Goodwill and Intangible Assets – Net155.4 155.4 
Other Non-Current Assets264.8 262.9 
Total Assets$6,604.6 $6,656.4 
Liabilities, Redeemable Non-Controlling Interest and Equity  
Liabilities  
Current Liabilities  
Accounts Payable$84.2 $102.2 
Accrued Taxes62.9 51.0 
Accrued Interest16.3 21.1 
Long-Term Debt Due Within One Year17.2 111.4 
Other80.2 91.9 
Total Current Liabilities260.8 377.6 
Long-Term Debt1,772.4 1,679.9 
Deferred Income Taxes195.0 192.7 
Regulatory Liabilities564.0 574.0 
Defined Benefit Pension and Other Postretirement Benefit Plans135.4 160.8 
Other Non-Current Liabilities268.0 264.3 
Total Liabilities3,195.6 3,249.3 
Commitments, Guarantees and Contingencies (Note 6)
Redeemable Non-Controlling Interest0.5 0.5 
Equity  
ALLETE Equity
Common Stock Without Par Value, 80.0 Shares Authorized, 57.7 and 57.6 Shares Issued and Outstanding
1,807.4 1,803.7 
Accumulated Other Comprehensive Loss(20.9)(20.5)
Retained Earnings1,036.5 1,026.4 
Total ALLETE Equity2,823.0 2,809.6 
Non-Controlling Interest in Subsidiaries585.5 597.0 
Total Equity3,408.5 3,406.6 
Total Liabilities, Redeemable Non-Controlling Interest and Equity$6,604.6 $6,656.4 
The accompanying notes are an integral part of these statements.
ALLETE, Inc. First Quarter 2024 Form 10-Q
7



ALLETE
CONSOLIDATED STATEMENT OF INCOME
Unaudited
Three Months Ended
March 31,
 20242023
Millions Except Per Share Amounts
Operating Revenue
Contracts with Customers – Utility$338.3 $312.6 
Contracts with Customers – Non-utility63.7 251.0 
Other – Non-utility1.3 1.3 
Total Operating Revenue403.3 564.9 
Operating Expenses
Fuel, Purchased Power and Gas – Utility133.5 118.6 
Transmission Services – Utility22.7 20.1 
Cost of Sales – Non-utility24.4 210.5 
Operating and Maintenance91.7 85.7 
Depreciation and Amortization65.0 62.3 
Taxes Other than Income Taxes18.7 19.4 
Total Operating Expenses356.0 516.6 
Operating Income47.3 48.3 
Other Income (Expense)
Interest Expense(20.4)(19.3)
Equity Earnings5.5 6.0 
Other8.6 4.1 
Total Other Expense(6.3)(9.2)
Income Before Income Taxes41.0 39.1 
Income Tax Expense4.0 1.5 
Net Income37.0 37.6 
Net Loss Attributable to Non-Controlling Interest(13.7)(20.6)
Net Income Attributable to ALLETE$50.7 $58.2 
Average Shares of Common Stock
Basic57.6 57.3 
Diluted57.7 57.3 
Basic Earnings Per Share of Common Stock$0.88 $1.02 
Diluted Earnings Per Share of Common Stock$0.88 $1.02 
The accompanying notes are an integral part of these statements.
ALLETE, Inc. First Quarter 2024 Form 10-Q
8



ALLETE
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Unaudited
Three Months Ended
March 31,
20242023
Millions  
Net Income$37.0 $37.6 
Other Comprehensive Income (Loss)  
Unrealized Gain on Securities
Net of Income Tax Expense of $ and $0.1
 0.1 
Defined Benefit Pension and Other Postretirement Benefit Plans
Net of Income Tax Expense of $0.1 and $
(0.4) 
Total Other Comprehensive Income (Loss)(0.4)0.1 
Total Comprehensive Income36.6 37.7 
Net Loss Attributable to Non-Controlling Interest(13.7)(20.6)
Total Comprehensive Income Attributable to ALLETE$50.3 $58.3 
The accompanying notes are an integral part of these statements.

ALLETE, Inc. First Quarter 2024 Form 10-Q
9



ALLETE
CONSOLIDATED STATEMENT OF CASH FLOWS
Unaudited
Three Months Ended
March 31,
 20242023
Millions
Operating Activities  
Net Income$37.0 $37.6 
Adjustments to Reconcile Net Income to Cash provided by (used in) Operating Activities:
AFUDC – Equity(1.2)(0.5)
Loss (Income) on Investments and Property, Plant and Equipment(0.5)0.4 
Depreciation Expense65.0 62.3 
Amortization of PSAs(1.3)(1.3)
Amortization of Other Intangible Assets and Other Assets1.6 1.9 
Deferred Income Tax Benefit(2.9)(6.3)
Share-Based and ESOP Compensation Expense1.7 0.8 
Defined Benefit Pension and Other Postretirement Plan Benefit(3.4)(0.8)
Fuel Adjustment Clause4.9 15.3 
Bad Debt Expense0.3 0.3 
Provision for Interim Rate Refund5.5 5.1 
Changes in Operating Assets and Liabilities  
Accounts Receivable(5.5)17.3 
Inventories(7.3)109.0 
Prepayments and Other6.7 11.0 
Accounts Payable(10.4)(10.7)
Other Current Liabilities(19.8)(142.2)
Cash Contributions to Defined Benefit Pension Plans(25.0)(6.5)
Changes in Regulatory and Other Non-Current Assets9.1 (0.7)
Changes in Regulatory and Other Non-Current Liabilities5.6 0.4 
Cash provided by Operating Activities60.1 92.4 
Investing Activities  
Proceeds from Sale of Available-for-sale Securities1.4  
Payments for Purchase of Available-for-sale Securities(1.5) 
Payments for Equity Method Investments(1.6)(0.8)
Additions to Property, Plant and Equipment(60.6)(70.0)
Other Investing Activities1.5 (3.9)
Cash used in Investing Activities(60.8)(74.7)
Financing Activities  
Proceeds from Issuance of Common Stock2.0 3.3 
Proceeds from Issuance of Short-Term and Long-Term Debt156.0 238.5 
Repayments of Short-Term and Long-Term Debt(158.0)(227.8)
Proceeds from Non-Controlling Interest in Subsidiaries – Net2.7 6.7 
Distributions to Non-Controlling Interest(0.5)(0.3)
Dividends on Common Stock(40.6)(38.8)
Other Financing Activities 0.1 
Cash used in Financing Activities(38.4)(18.3)
Change in Cash, Cash Equivalents and Restricted Cash(39.1)(0.6)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period79.4 40.2 
Cash, Cash Equivalents and Restricted Cash at End of Period$40.3 $39.6 
The accompanying notes are an integral part of these statements.
ALLETE, Inc. First Quarter 2024 Form 10-Q
10



ALLETE
CONSOLIDATED STATEMENT OF EQUITY
Unaudited
Three Months Ended
March 31,
20242023
Millions Except Per Share Amounts
Equity
Common Stock
Balance, Beginning of Period$1,803.7 $1,781.5 
Common Stock Issued3.7 4.1 
Balance, End of Period1,807.4 1,785.6 
Accumulated Other Comprehensive Loss
Balance, Beginning of Period(20.5)(24.4)
Other Comprehensive Income – Net of Income Taxes
Unrealized Gain on Debt Securities 0.1 
Defined Benefit Pension and Other Postretirement Plans(0.4) 
Balance, End of Period(20.9)(24.3)
Retained Earnings
Balance, Beginning of Period1,026.4 934.8 
Net Income Attributable to ALLETE50.7 58.2 
Common Stock Dividends (40.6)(38.8)
Balance, End of Period1,036.5 954.2 
Non-Controlling Interest in Subsidiaries
Balance, Beginning of Period597.0656.4
Proceeds from Non-Controlling Interest in Subsidiaries – Net  6.7 
Net Loss Attributable to Non-Controlling Interest(11.0)(20.6)
Distributions to Non-Controlling Interest(0.5)(0.3)
Balance, End of Period585.5 642.2 
Total Equity$3,408.5 $3,357.7 
Redeemable Non-Controlling Interest
Balance, Beginning of Period$0.5  
Proceeds from Non-Controlling Interest in Subsidiaries2.7  
Net Loss Attributable to Non-Controlling Interest(2.7) 
Total Redeemable Non-Controlling Interest$0.5  
Dividends Per Share of Common Stock$0.705 $0.6775 
The accompanying notes are an integral part of these statements.
ALLETE, Inc. First Quarter 2024 Form 10-Q
11



NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – UNAUDITED

The accompanying unaudited Consolidated Financial Statements have been prepared in accordance with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X, and do not include all of the information and notes required by GAAP for complete financial statements pursuant to such rules and regulations. Similarly, the December 31, 2023, Consolidated Balance Sheet was derived from audited financial statements, but does not include all disclosures required by GAAP. The presentation of certain prior period amounts on the Consolidated Financial Statements have been adjusted for comparative purposes. In management’s opinion, these unaudited financial statements include all adjustments necessary for a fair statement of financial results. All adjustments are of a normal, recurring nature, except as otherwise disclosed. Operating results for the three months ended March 31, 2024, are not necessarily indicative of results that may be expected for any other interim period or for the year ending December 31, 2024. For further information, refer to the Consolidated Financial Statements and notes included in our 2023 Form 10-K.


NOTE 1. OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES

Subsequent Events. The Company performed an evaluation of subsequent events for potential recognition and disclosure through the date of the financial statements issuance.

On May 5, 2024, ALLETE entered into the Merger Agreement. (See Note 11. Subsequent Event – Agreement and Plan of Merger.)

Cash, Cash Equivalents and Restricted Cash. We consider all investments purchased with original maturities of three months or less to be cash equivalents. As of March 31, 2024, restricted cash amounts included in Prepayments and Other on the Consolidated Balance Sheet include collateral deposits required under an ALLETE Clean Energy loan. The restricted cash amounts included in Other Non-Current Assets represent collateral deposits required under an ALLETE Clean Energy loan agreement as well as PSAs. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Balance Sheet that aggregate to the amounts presented in the Consolidated Statement of Cash Flows.
Cash, Cash Equivalents and Restricted CashMarch 31,
2024
December 31,
2023
March 31,
2023
December 31,
2022
Millions  
Cash and Cash Equivalents$32.0 $71.9 $29.9 $36.4 
Restricted Cash included in Prepayments and Other 5.9 5.1 7.4 1.5 
Restricted Cash included in Other Non-Current Assets2.4 2.4 2.3 2.3 
Cash, Cash Equivalents and Restricted Cash on the Consolidated Statement of Cash Flows$40.3 $79.4 $39.6 $40.2 

Inventories – Net. Inventories are stated at the lower of cost or net realizable value. Inventories in our Regulated Operations segment are carried at an average cost or first-in, first-out basis. Inventories in our ALLETE Clean Energy segment and Corporate and Other businesses are carried at an average cost, first-in, first-out or specific identification basis.

Inventories – NetMarch 31,
2024
December 31,
2023
Millions  
Fuel (a)
$30.2 $27.2 
Materials and Supplies 119.0 115.7 
Renewable Energy Facilities Under Development (b)
33.5 32.5 
Total Inventories – Net$182.7 $175.4 
(a)    Fuel consists primarily of coal inventory at Minnesota Power.
(b)    Renewable Energy Facilities Under Development as of March 31, 2024, consists primarily of project costs related to renewable energy development projects at New Energy.
Goodwill. The aggregate carrying amount of goodwill was $154.9 million as of March 31, 2024 ($154.9 million as of December 31, 2023). There have been no changes to goodwill by reportable segment for the quarter and three months ended March 31, 2024.
ALLETE, Inc. First Quarter 2024 Form 10-Q
12



NOTE 1. OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (Continued)

Other Non-Current AssetsMarch 31,
2024
December 31,
2023
Millions
Other Postretirement Benefit Plans$104.6 $106.3 
Contract Assets (a)
17.9 18.5 
Operating Lease Right-of-use Assets11.3 10.7 
ALLETE Properties10.7 10.8 
Restricted Cash2.4 2.4 
Finance Lease Right-of-use Assets2.0 2.1 
Other115.9 112.1 
Total Other Non-Current Assets$264.8 $262.9 
(a)    Contract Assets consist of payments made to customers as an incentive to execute or extend service agreements. The payments are being amortized over the term of the respective agreements as a reduction to revenue.     

Other Current LiabilitiesMarch 31,
2024
December 31,
2023
Millions  
PSAs$6.0 $6.0 
Customer Deposits5.7 7.4 
Provision for Interim Rate Refund 5.5  
Operating Lease Liabilities3.1 3.0 
Finance Lease Liabilities0.4 0.4 
Other59.5 75.1 
Total Other Current Liabilities$80.2 $91.9 


Other Non-Current LiabilitiesMarch 31,
2024
December 31,
2023
Millions  
Asset Retirement Obligation (a)
$206.1 $202.9 
PSAs19.5 20.9 
Operating Lease Liabilities8.3 7.7 
Finance Lease Liabilities1.5 1.6 
Other32.6 31.2 
Total Other Non-Current Liabilities$268.0 $264.3 
(a)The asset retirement obligation is primarily related to our Regulated Operations and is funded through customer rates over the life of the related assets. Additionally, BNI Energy funds its obligation through its cost-plus coal supply agreements for which BNI Energy has recorded a receivable of $37.2 million in Other Non-Current Assets on the Consolidated Balance Sheet as of March 31, 2024 ($37.2 million as of December 31, 2023).

ALLETE, Inc. First Quarter 2024 Form 10-Q
13



NOTE 1. OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (Continued)
Three Months Ended
March 31,
Other Income20242023
Millions
Pension and Other Postretirement Benefit Plan Non-Service Credits (a)
$4.3 $2.0 
Interest and Investment Income1.9 1.1 
AFUDC - Equity1.2 0.5 
Other1.2 0.5 
Total Other Income$8.6 $4.1 
(a)These are components of net periodic pension and other postretirement benefit cost other than service cost. (See Note 9. Pension and Other Postretirement Benefit Plans.)

Three Months Ended
March 31,
Supplemental Statement of Cash Flows Information20242023
Millions  
Cash Paid for Interest – Net of Amounts Capitalized$25.7$24.6
Noncash Investing and Financing Activities  
Decrease in Accounts Payable for Capital Additions to Property, Plant and Equipment$(5.9)$(7.1)
Capitalized Asset Retirement Costs$2.2$2.4
AFUDC–Equity$1.2$0.5

New Accounting Pronouncements and Disclosure Rules.

SEC Climate-related Disclosures Rule. On March 6, 2024, the SEC issued the final rules regarding the enhancement and standardization of climate-related disclosures for investors (Rule). The Rule requires registrants to provide certain climate-related information in their annual reports and registration statements. These requirements include disclosing climate-related risks that materially affect or are reasonably likely to materially affect a registrant’s business strategy, results of operations, or financial condition as well as certain disclosures related to greenhouse-gas emissions, and the effects of severe weather events and other natural conditions. The disclosure requirements will begin phasing in for annual periods beginning in 2025. The Company is evaluating the final rule to determine its impact on the Company’s disclosures. The Rule is currently being challenged before the U.S. Court of Appeals, and the SEC issued a voluntary stay of the Rule on April 4, 2024, pending judicial review.

There are no other new accounting pronouncements or rules that we anticipate having a material effect on the presentation of ALLETE’s consolidated financial statements.


NOTE 2. REGULATORY MATTERS

Regulatory matters are summarized in Note 4. Regulatory Matters to the Consolidated Financial Statements in our 2023 Form 10-K, with additional disclosure provided in the following paragraphs.

Electric Rates. Entities within our Regulated Operations segment file for periodic rate revisions with the MPUC, PSCW or FERC. As authorized by the MPUC, Minnesota Power also recognizes revenue under cost recovery riders for transmission, renewable, and environmental investments and expenditures. Revenue from cost recovery riders was $8.3 million for the three months ended March 31, 2024 ($16.4 million for the three months ended March 31, 2023).


ALLETE, Inc. First Quarter 2024 Form 10-Q
14



NOTE 2. REGULATORY MATTERS (Continued)

2024 Minnesota General Rate Case. On November 1, 2023, Minnesota Power filed a retail rate increase request with the MPUC seeking an average increase of approximately 12.00 percent for retail customers, net of rider revenue incorporated into base rates. The rate filing seeks a return on equity of 10.30 percent and a 53.00 percent equity ratio. On an annualized basis, the requested final rate increase would generate approximately $89 million in additional revenue. In separate orders dated December 19, 2023, the MPUC accepted the filing as complete and approved an annual interim rate increase of approximately $64 million, net of rider revenue, beginning January 1, 2024, subject to refund.

On May 3, 2024, Minnesota Power entered into a settlement agreement with the Minnesota Department of Commerce, Minnesota Office of the Attorney General, Residential Utilities Division, and Large Power Intervenors to settle the retail rate increase request. The settlement agreement is subject to approval by the MPUC. As part of the settlement agreement, the parties have agreed on all issues, including an overall rate increase of $33.97 million, net of rider revenue and amounts transferring to the fuel adjustment clause, a return on equity of 9.78 percent, all non-financial items and cost allocation. As a result of the settlement, Minnesota Power recorded a reserve for an interim rate refund of $5.5 million pre-tax as of March 31, 2024, which is subject to MPUC approval of the settlement agreement and Minnesota Power’s refund calculation.

2022 Minnesota General Rate Case. Minnesota Power is appealing with the Minnesota Court of Appeals (Court) specific aspects of the MPUC’s February 2023 and May 2023 rate case orders for the ratemaking treatment of Taconite Harbor and Minnesota Power’s prepaid pension asset. Oral arguments on the appeal are expected to be heard by the Court in the second quarter of 2024 with a decision expected in the third quarter of 2024. We are unable to predict the outcome of this proceeding.

2024 Wisconsin General Rate Case. On March 29, 2024, SWL&P filed a rate increase request for its electric, gas and water utilities with the PSCW. The filing seeks an overall return on equity of 10.00 percent and a 55.00 percent equity ratio. On an annualized basis, the requested change would increase rates by approximately 5.90 percent for retail customers and generate an estimated $7.3 million of additional revenue. The change to SWL&P customers’ rates will be determined by the PSCW later this year. Any rate adjustments are anticipated to become effective in January 2025.

Transmission Cost Recovery Rider. Minnesota Power has an approved cost recovery rider in place to charge retail customers on a current basis for certain transmission investments and expenditures, including a return on the capital invested. Current customer billing rates are based on an MPUC order dated December 19, 2023, which provisionally approved Minnesota Power’s latest transmission factor filing submitted on October 24, 2023. Updated billing rates were included on customer bills starting in the first quarter of 2024, and the MPUC approved Minnesota Power’s transmission factor filing with no changes in an order dated March 5, 2024.

Renewable Cost Recovery Rider. Minnesota Power has an approved cost recovery rider in place to charge retail customers on a current basis for the costs of certain renewable investments and expenditures, including a return on the capital invested. Current customer billing rates for the renewable cost recovery rider were approved by the MPUC in an order dated October 3, 2023. On March 27, 2024, Minnesota Power submitted its latest renewable factor filing. If the filing is approved, Minnesota Power would be authorized to include updated billing rates on customer bills beginning October 1, 2024.

Solar Cost Recovery Rider. Minnesota Power has an approved cost recovery rider in place to charge retail customers on a current basis for solar costs related to investments and expenditures for meeting the state of Minnesota’s solar energy standard. Current customer billing rates were approved by the MPUC in an order dated December 26, 2023. Updated billing rates were included on customer bills starting in the first quarter of 2024.

Fuel Adjustment Clause. Minnesota Power incurred lower fuel and purchased power costs in 2023 than those factored in its fuel adjustment forecast filed in May 2022 for 2023, which resulted in the recognition of an approximately $13 million regulatory liability as of March 31, 2024, and December 31, 2023. Minnesota Power requested to refund the regulatory liability beginning in the third quarter of 2024 as part of its annual true-up filing submitted to the MPUC on March 1, 2024.


ALLETE, Inc. First Quarter 2024 Form 10-Q
15



NOTE 2. REGULATORY MATTERS (Continued)

Energy Conservation and Optimization (ECO) Plan. On April 1, 2024, Minnesota Power submitted its 2023 ECO annual filing (formerly the Conservation Improvement Plan) detailing Minnesota Power’s ECO plan results and requesting a financial incentive of $2.2 million, which will be recognized upon approval by the MPUC. In 2023, a financial incentive of $2.2 million was recognized in the third quarter upon approval by the MPUC of the 2022 ECO annual filing. The financial incentives are recognized in the period in which the MPUC approves the filing.

Regulatory Assets and Liabilities. Our regulated utility operations are subject to accounting standards for the effects of certain types of regulation. Regulatory assets represent incurred costs that have been deferred as they are probable for recovery in customer rates. Regulatory liabilities represent obligations to make refunds to customers and amounts collected in rates for which the related costs have not yet been incurred. The Company assesses quarterly whether regulatory assets and liabilities meet the criteria for probability of future recovery or deferral. The recovery, refund or credit to rates for these regulatory assets and liabilities will occur over the periods either specified by the applicable regulatory authority or over the corresponding period related to the asset or liability.

Regulatory Assets and LiabilitiesMarch 31,
2024
December 31,
2023
Millions 
Current Regulatory Assets (a)
  
Fuel Adjustment Clause $8.1 $8.7 
Other0.6 0.6 
Total Current Regulatory Assets$8.7 $9.3 
Non-Current Regulatory Assets  
Defined Benefit Pension and Other Postretirement Plans$217.3 $218.6 
Income Taxes85.1 88.1 
Asset Retirement Obligations 38.3 37.7 
Cost Recovery Riders27.6 33.8 
Taconite Harbor18.3 20.9 
Manufactured Gas Plant
13.1 13.2 
PPACA Income Tax Deferral3.9 3.9 
Fuel Adjustment Clause 2.1 5.0 
Other3.3 4.2 
Total Non-Current Regulatory Assets$409.0 $425.4 
Current Regulatory Liabilities (b)
  
Fuel Adjustment Clause$9.0  
Provision for Interim Rate Refund5.5  
Transmission Formula Rates Refund1.0 $1.5 
Other1.6 2.4 
Total Current Regulatory Liabilities $17.1 $3.9 
Non-Current Regulatory Liabilities  
Income Taxes $302.3 $310.0 
Wholesale and Retail Contra AFUDC 77.3 78.0 
Plant Removal Obligations69.3 67.0 
Defined Benefit Pension and Other Postretirement Benefit Plans45.5 48.6 
Non-Jurisdictional Land Sales35.1 30.2 
Investment Tax Credits13.5 13.6 
Fuel Adjustment Clause8.2 15.5 
Boswell Units 1 and 2 Net Plant and Equipment6.7 6.7 
Other6.1 4.4 
Total Non-Current Regulatory Liabilities$564.0 $574.0 
(a)Current regulatory assets are presented within Prepayments and Other on the Consolidated Balance Sheet.
(b)Current regulatory liabilities are presented within Other Current Liabilities on the Consolidated Balance Sheet.
ALLETE, Inc. First Quarter 2024 Form 10-Q
16



NOTE 3. EQUITY INVESTMENTS

Investment in ATC. Our wholly-owned subsidiary, ALLETE Transmission Holdings, owns approximately 8 percent of ATC, a Wisconsin-based utility that owns and maintains electric transmission assets in portions of Wisconsin, Michigan, Minnesota and Illinois. We account for our investment in ATC under the equity method of accounting.
ALLETE’s Investment in ATC 
Millions 
Equity Investment Balance as of December 31, 2023$179.7 
Cash Investments1.6 
Equity in ATC Earnings5.7 
Distributed ATC Earnings(4.6)
Amortization of the Remeasurement of Deferred Income Taxes0.3 
Equity Investment Balance as of March 31, 2024$182.7 

ATC’s authorized return on equity was 10.02 percent, or 10.52 percent including an incentive adder for participation in a regional transmission organization, based on a 2020 FERC order which is subject to various outstanding legal challenges related to the return on equity calculation and refund period ordered by the FERC. In August 2022, the U.S. Court of Appeals for the District of Columbia Circuit vacated and remanded the 2020 FERC order back to FERC. We cannot predict the return on equity the FERC will ultimately authorize in the remanded proceeding.

In addition, the FERC issued a Notice of Proposed Rulemaking in 2021 proposing to limit the 0.50 percent incentive adder for participation in a regional transmission organization to only the first three years of membership in such an organization. If this proposal is adopted, our equity in earnings from ATC would be reduced by approximately $1 million pre-tax annually.

Investment in Nobles 2. Our subsidiary, ALLETE South Wind, owns 49 percent of Nobles 2, the entity that owns and operates a 250 MW wind energy facility in southwestern Minnesota pursuant to a 20-year PPA with Minnesota Power. We account for our investment in Nobles 2 under the equity method of accounting.

ALLETE’s Investment in Nobles 2
Millions
Equity Investment Balance as of December 31, 2023$151.5 
Equity in Nobles 2 Earnings (a)
(0.2)
Distributed Nobles 2 Earnings(0.9)
Equity Investment Balance as of March 31, 2024$150.4 
(a)The Company also recorded earnings from net loss attributable to non-controlling interest of $3.0 million related to its investment in Nobles 2.


NOTE 4. FAIR VALUE

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). We utilize market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, market corroborated or generally unobservable. We primarily apply the market approach for recurring fair value measurements and endeavor to utilize the best available information. Accordingly, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. These inputs, which are used to measure fair value, are prioritized through the fair value hierarchy. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). Descriptions of the three levels of the fair value hierarchy are discussed in Note 7. Fair Value to the Consolidated Financial Statements in our 2023 Form 10-K.


ALLETE, Inc. First Quarter 2024 Form 10-Q
17



NOTE 4. FAIR VALUE (Continued)

The following tables set forth, by level within the fair value hierarchy, our assets and liabilities that were accounted for at fair value on a recurring basis as of March 31, 2024, and December 31, 2023. Each asset and liability is classified based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment, which may affect the valuation of these assets and liabilities and their placement within the fair value hierarchy levels. The estimated fair value of Cash and Cash Equivalents on the Consolidated Balance Sheet approximates the carrying amount and therefore is excluded from the recurring fair value measures in the following tables.

 Fair Value as of March 31, 2024
Recurring Fair Value MeasuresLevel 1Level 2Level 3Total
Millions    
Assets    
Investments (a)
Available-for-sale – Equity Securities$8.6   $8.6 
Available-for-sale – Corporate and Governmental Debt Securities (b)
 $6.5  6.5 
Cash Equivalents6.0   6.0 
Total Fair Value of Assets$14.6 $6.5  $21.1 
Liabilities    
Deferred Compensation (c)
 $18.1  $18.1 
Total Fair Value of Liabilities $18.1  $18.1 
 Fair Value as of December 31, 2023
Recurring Fair Value MeasuresLevel 1Level 2Level 3Total
Millions
Assets
Investments (a)
Available-for-sale – Equity Securities$8.7   $8.7 
Available-for-sale – Corporate and Governmental Debt Securities $6.0  6.0 
Cash Equivalents5.8   5.8 
Total Fair Value of Assets$14.5 $6.0  $20.5 
Liabilities
Deferred Compensation (c)
 $16.5  $16.5 
Total Fair Value of Liabilities $16.5  $16.5 
(a)Included in Other Non-Current Assets on the Consolidated Balance Sheet.
(b)As of March 31, 2024, the aggregate amount of available-for-sale corporate and governmental debt securities maturing in one year or less was $1.7 million, in one year to less than three years was $2.7 million, in three years to less than five years was $1.6 million and in five or more years was $0.5 million.
(c)Included in Other Non-Current Liabilities on the Consolidated Balance Sheet.

Fair Value of Financial Instruments. With the exception of the item listed in the following table, the estimated fair value of all financial instruments approximates the carrying amount. The fair value of the item listed in the following table was based on quoted market prices for the same or similar instruments (Level 2).
Financial InstrumentsCarrying AmountFair Value
Millions  
Short-Term and Long-Term Debt (a)
  
March 31, 2024$1,797.3$1,646.8
December 31, 2023$1,799.4$1,670.6
(a)Excludes unamortized debt issuance costs.


ALLETE, Inc. First Quarter 2024 Form 10-Q
18



NOTE 4. FAIR VALUE (Continued)

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis. Non-financial assets such as equity method investments, land inventory, and property, plant and equipment are measured at fair value when there is an indicator of impairment and recorded at fair value only when an impairment is recognized. For the three months ended March 31, 2024, and the year ended December 31, 2023, there were no indicators of impairment for these non-financial assets.

We continue to monitor changes in the broader energy markets along with wind resource expectations that could indicate impairment at ALLETE Clean Energy wind energy facilities upon contract expirations or for facilities without long-term contracts for their entire output. A continued decline or volatility in energy prices or lower wind resource expectations could result in a future impairment.


NOTE 5. SHORT-TERM AND LONG-TERM DEBT

The following tables present the Company’s short-term and long-term debt as of March 31, 2024, and December 31, 2023:
March 31, 2024PrincipalUnamortized Debt Issuance CostsTotal
Millions  
Short-Term Debt$17.2 $17.2 
Long-Term Debt1,780.1 $(7.7)1,772.4 
Total Debt$1,797.3 $(7.7)$1,789.6 
December 31, 2023PrincipalUnamortized Debt Issuance CostsTotal
Millions  
Short-Term Debt $111.5 $(0.1)$111.4 
Long-Term Debt1,687.9 (8.0)1,679.9 
Total Debt$1,799.4 $(8.1)$1,791.3 

We had $19.4 million outstanding in standby letters of credit and $94.0 million outstanding draws under our lines of credit as of March 31, 2024 ($19.4 million in standby letters of credit and $34.1 million outstanding draws as of December 31, 2023). We also have standby letters of credit outstanding under other letter of credit facilities. (See Note 6. Commitments, Guarantees and Contingencies.)

On April 23, 2024, ALLETE issued $100 million of its First Mortgage Bonds (Bonds) to certain institutional buyers in the private placement market. The Bonds, which bear interest at 5.72 percent, will mature in April 2039 and pay interest semi-annually in April and October of each year, commencing on October 30, 2024. ALLETE has the option to prepay all or a portion of the Bonds at its discretion, subject to a make-whole provision. The Bonds are subject to additional terms and conditions which are customary for these types of transactions. Proceeds from the sale of the Bonds were used to refinance existing indebtedness and for general corporate purposes. The Bonds were sold in reliance on an exemption from registration under Section 4(a)(2) of the Securities Act of 1933, as amended, to institutional accredited investors.

Financial Covenants. Our long-term debt arrangements contain customary covenants. In addition, our lines of credit and letters of credit supporting certain long-term debt arrangements contain financial covenants. Our compliance with financial covenants is not dependent on debt ratings. The most restrictive financial covenant requires ALLETE to maintain a ratio of indebtedness to total capitalization (as the amounts are calculated in accordance with the respective long-term debt arrangements) of less than or equal to 0.65 to 1.00, measured quarterly. As of March 31, 2024, our ratio was approximately 0.36 to 1.00. Failure to meet this covenant would give rise to an event of default if not cured after notice from the lender, in which event ALLETE may need to pursue alternative sources of funding. Some of ALLETE’s debt arrangements contain “cross-default” provisions that would result in an event of default if there is a failure under other financing arrangements to meet payment terms or to observe other covenants that would result in an acceleration of payments due. ALLETE has no significant restrictions on its ability to pay dividends from retained earnings or net income. As of March 31, 2024, ALLETE was in compliance with its financial covenants.


ALLETE, Inc. First Quarter 2024 Form 10-Q
19



NOTE 6. COMMITMENTS, GUARANTEES AND CONTINGENCIES

Power Purchase and Sale Agreements. Our long-term PPAs have been evaluated under the accounting guidance for variable interest entities. We have determined that either we have no variable interest in the PPAs or, where we do have variable interests, we are not the primary beneficiary; therefore, consolidation is not required. These conclusions are based on the fact that we do not have both control over activities that are most significant to the entity and an obligation to absorb losses or receive benefits from the entity’s performance. Our financial exposure relating to these PPAs is limited to our capacity and energy payments.

Our PPAs are summarized in Note 9. Commitments, Guarantees and Contingencies to the Consolidated Financial Statements in our 2023 Form 10-K, with additional disclosure provided in the following paragraphs.

Square Butte PPA. As of March 31, 2024, Square Butte had total debt outstanding of $162.6 million. Fuel expenses are recoverable through Minnesota Power’s fuel adjustment clause and include the cost of coal purchased from BNI Energy under a long-term contract. Minnesota Power’s cost of power purchased from Square Butte during the three months ended March 31, 2024, was $22.9 million ($22.1 million for the same period in 2023). This reflects Minnesota Power’s pro rata share of total Square Butte costs based on the 50 percent output entitlement. Included in this amount was Minnesota Power’s pro rata share of interest expense of $1.3 million ($1.3 million for the same period in 2023). Minnesota Power’s payments to Square Butte are approved as a purchased power expense for ratemaking purposes by both the MPUC and the FERC.

Minnkota Power PSA. Minnesota Power has a PSA with Minnkota Power, which commenced in 2014. Under the PSA, Minnesota Power is selling a portion of its entitlement from Square Butte to Minnkota Power, resulting in Minnkota Power’s net entitlement increasing and Minnesota Power’s net entitlement decreasing until Minnesota Power’s share is eliminated at the end of 2025. Of Minnesota Power’s 50 percent output entitlement, Minnesota Power sold to Minnkota Power approximately 41 percent in 2024 and 37 percent in 2023.

Coal, Rail and Shipping Contracts. Minnesota Power has coal supply agreements providing for the purchase of a significant portion of its coal requirements through December 2025. Minnesota Power also has coal transportation agreements in place for the delivery of a significant portion of its coal requirements through December 2024. The costs of fuel and related transportation costs for Minnesota Power’s generation are recoverable from Minnesota Power’s utility customers through the fuel adjustment clause.

Environmental Matters.

Our businesses are subject to regulation of environmental matters by various federal, state, and local authorities. A number of regulatory changes to the Clean Air Act, the Clean Water Act and various waste management requirements have been promulgated by both the EPA and state authorities over the past several years. Minnesota Power’s facilities are subject to additional requirements under many of these regulations. Minnesota Power is reshaping its generation portfolio, over time, to reduce its reliance on coal, has installed cost-effective emission control technology, and advocates for sound science and policy during rulemaking implementation.

We consider our businesses to be in substantial compliance with currently applicable environmental regulations and believe all necessary permits have been obtained. We anticipate that with many state and federal environmental regulations and requirements finalized, or to be finalized in the near future, potential expenditures for future environmental matters may be material and require significant capital investments. Minnesota Power has evaluated various environmental compliance scenarios using possible outcomes of environmental regulations to project power supply trends and impacts on customers.

We review environmental matters on a quarterly basis. Accruals for environmental matters are recorded when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated based on current law and existing technologies. Accruals are adjusted as assessment and remediation efforts progress, or as additional technical or legal information becomes available. Accruals for environmental liabilities are included in the Consolidated Balance Sheet at undiscounted amounts and exclude claims for recoveries from insurance or other third parties. Costs related to environmental contamination treatment and cleanup are expensed unless recoverable in rates from customers.

Air. The electric utility industry is regulated both at the federal and state level to address air emissions. Minnesota Power’s thermal generating facilities mainly burn low-sulfur western sub-bituminous coal. All of Minnesota Power’s coal-fired generating facilities are equipped with pollution control equipment such as scrubbers, baghouses and low NOX technologies. Under currently applicable environmental regulations, these facilities are substantially compliant with emission requirements.

ALLETE, Inc. First Quarter 2024 Form 10-Q
20



NOTE 6. COMMITMENTS, GUARANTEES AND CONTINGENCIES (Continued)
Environmental Matters (Continued)

Cross-State Air Pollution Rule (CSAPR). The CSAPR requires certain states in the eastern half of the U.S., including Minnesota, to reduce power plant emissions that contribute to ozone or fine particulate pollution in other states. The CSAPR does not require installation of controls but does require facilities have sufficient allowances to cover their emissions on an annual basis. These allowances are allocated to facilities from each state’s annual budget and can be bought and sold. Based on our review of the NOX and SO2 allowances issued and pending issuance as well as consideration of current rules, we currently expect generation levels and emission rates will result in continued compliance with the CSAPR. Minnesota Power will continue to monitor ongoing CSAPR rulemakings and compliance implementation, including the EPA’s Good Neighbor Rule which modifies certain aspects of the CSAPR’s program scope and extent (see EPA Good Neighbor Plan for 2015 Ozone NAAQS).

National Ambient Air Quality Standards (NAAQS). The EPA is required to review the NAAQS every five years. If the EPA determines that a state’s air quality is not in compliance with the NAAQS, the state is required to adopt plans describing how it will reduce emissions to attain the NAAQS. Minnesota Power actively monitors NAAQS developments, and the EPA is currently reviewing the primary or secondary NAAQS for NOx, SO2, and ozone. On February 7, 2024, the EPA announced a final rule lowering the annual primary standard for fine particulate matter while retaining other existing primary and secondary standards such as those for coarse particulate matter. The Company is reviewing the new standard to determine potential impacts. Anticipated timelines and compliance costs related to this new standard and other potential NAAQS revisions cannot yet be estimated; however, costs could be material. Minnesota Power would seek recovery of additional costs through a rate proceeding.

EPA Good Neighbor Plan for 2015 Ozone NAAQS. On June 5, 2023, after disapproving state implementation plans, the EPA published a final Federal Implementation Plan (FIP) rule in the Federal Register, the Good Neighbor Plan, to address regional ozone transport for the 2015 Ozone NAAQS by reducing NOx emissions during the period of May 1 through September 30 (ozone season). In its justification for the final rule, the EPA asserted that 23 states, including Minnesota, were modeled as significant contributors to downwind states’ challenges in attaining or maintaining ozone NAAQS compliance within their state borders. The Good Neighbor Plan is designed to resolve this interstate transport issue by implementing a variety of NOx reduction strategies, including federal implementation plan requirements, NOx emission limitations, and ozone season allowance program requirements. The final rule imposed restrictions on fossil-fuel fired power plants in 22 states and on certain industrial sources in 20 states, with implementation occurring through changes to the existing CSAPR program for power plants.

Since the EPA partially disapproved the Good Neighbor State Implementation Plans (SIPs) for the states of Minnesota and Wisconsin, among others, Minnesota is subject to the final Good Neighbor Plan. However, Minnesota Power and a coalition of other Minnesota utilities and industry (the parties) co-filed challenges to the EPA’s final Minnesota SIP disapproval, submitting a petition for reconsideration and stay to the EPA, and a petition for judicial review to the U.S. Court of Appeals for the Eighth Circuit (Eighth Circuit Court). The parties are challenging and requesting reconsideration of certain technical components of the EPA’s review and subsequent partial disapproval of the state of Minnesota’s SIP. On July 5, 2023, the Eighth Circuit Court granted a stay of the SIP disapproval preventing the Good Neighbor Plan from taking effect in Minnesota. On March 28, 2024, the EPA issued a partial denial of several administrative reconsideration and stay petitions, including from the Minnesota coalition.

On September 29, 2023, the EPA issued an updated final interim rule addressing the stays in Minnesota and five other states, formally delaying the effective date of the final FIP for states with active stays in place. The state of Minnesota was therefore not subject to compliance obligations for the 2023 ozone season. Future compliance obligations will depend on resolution of the stay. Additionally, challenges have been filed against the final FIP rule by the Minnesota coalition parties and other entities, although the Minnesota coalition FIP challenge is currently in abeyance pending resolution of the SIP disapproval case. On February 21, 2024, the U.S. Supreme Court heard arguments from several states and industry groups requesting a national stay of the FIP rule. Anticipated compliance costs related to final Good Neighbor Plan compliance cannot yet be estimated due to uncertainties about SIP approval resolution, implementation timing, FIP rule outcome, and allowance costs and facility emissions during the ozone season. However, the costs could be material, including costs of additional NOx controls, emission allowance program participation, or operational changes, if any are required. Minnesota Power would seek recovery of additional costs through a rate proceeding.
ALLETE, Inc. First Quarter 2024 Form 10-Q
21



NOTE 6. COMMITMENTS, GUARANTEES AND CONTINGENCIES (Continued)
Environmental Matters (Continued)

EPA National Emission Standards for Hazardous Air Pollutants for Major Sources: Industrial, Commercial and Institutional Boilers and Process Heaters (Industrial Boiler MACT) Rule. A final rule issued by the EPA for Industrial Boiler MACT became effective in 2013 with compliance required at major existing sources in 2016, which applied to Minnesota Power’s Hibbard Renewable Energy Center and Rapids Energy Center. Compliance consisted largely of adjustments to fuels and operating practices and compliance costs were not material. After this initial rulemaking, litigation from 2016 through 2018 resulted in court orders directing that the EPA reconsider certain aspects of the regulation. A final rule incorporating these revisions became effective in December 2022, with a compliance deadline of October 6, 2025. Compliance costs are not expected to be material.

EPA Mercury and Air Toxics Standards (MATS) Rule. On April 25, 2024, the EPA published a final rule to revise the existing 2012 MATS Rule, which regulates air emissions of hazardous air pollutants from coal- and oil-fired electric generating units (EGUs). The final rule eliminates certain MATS compliance flexibility, lowers the particulate emission standard for all coal-fired EGUs, and reduces the mercury emission standard for lignite-fired EGUs. The rule will become effective 60 days after publication in the Federal Register, with compliance beginning in 2027. The MATS regulation applies at Minnesota Power’s Boswell facility, which is currently well-controlled for these emissions and already complying with some of the new requirements. The Company is analyzing the new rule but anticipates that its impacts to Boswell may be minimal. However, compliance costs cannot yet be estimated, and recovery of any additional costs would be sought through a rate proceeding.

Climate Change. The scientific community generally accepts that emissions of GHGs are linked to global climate change which creates physical and financial risks. Physical risks could include but are not limited to: increased or decreased precipitation and water levels in lakes and rivers; increased or other changes in temperatures; increased risk of wildfires; and changes in the intensity and frequency of extreme weather events. These all have the potential to affect the Company’s business and operations. We are addressing climate change by taking the following steps that also ensure reliable and environmentally compliant generation resources to meet our customers’ requirements:

Expanding renewable power supply for both our operations and the operations of others;
Providing energy conservation initiatives for our customers and engaging in other demand side management efforts;
Improving efficiency of our generating facilities;
Supporting research of technologies to reduce carbon emissions from generating facilities and carbon sequestration efforts;
Evaluating and developing less carbon intensive future generating assets such as efficient and flexible natural gas‑fired generating facilities;
Managing vegetation on right-of-way corridors to reduce potential wildfire or storm damage risks; and
Practicing sound forestry management in our service territories to create landscapes more resilient to disruption from climate-related changes, including planting and managing long-lived conifer species.

EPA Regulation of GHG Emissions. On April 25, 2024, the EPA issued several final greenhouse gas regulations to establish emissions standards and guidelines for fossil fuel-fired electric generating units (EGUs) under Section 111 of the Clean Air Act (CAA). The final rules revise new source performance standards (NSPS) for new, modified and reconstructed EGUs (Section 111(b) of the CAA) and creates new emission guidelines for existing EGUs (Section 111(d) of the CAA). The action also officially repeals the predecessor regulation “Affordable Clean Energy Rule”, first issued in 2019 and later vacated in 2021. Compliance will be required beginning January 1, 2030 for existing sources, and upon commencing operation of new units. The 111(d) rule also requires states to submit plans to provide for the establishment, implementation and enforcement of standards of performance for existing sources. States must submit their plans to the EPA within 24 months after publication of the final emissions guidelines.

The final 111 rules apply to several Company assets, including existing EGUs at the Boswell and Laskin facilities as well as the proposed combined cycle natural gas-fired generating facility, NTEC. The Company is reviewing the new rule, but anticipates compliance may require operational or planning adjustments. The state implementation plan process for Section 111(d) existing units will also be a factor in determining specific requirements and timing. We are unable to predict compliance costs at this time; however, the costs could be material. Minnesota Power would seek recovery of additional costs through a rate proceeding.

Water. The Clean Water Act requires NPDES permits be obtained from the EPA or delegated state agencies for any wastewater discharged into navigable waters. We have obtained all necessary NPDES permits, including NPDES storm water permits for applicable facilities, to conduct our operations.

ALLETE, Inc. First Quarter 2024 Form 10-Q
22



NOTE 6. COMMITMENTS, GUARANTEES AND CONTINGENCIES (Continued)
Environmental Matters (Continued)

Steam Electric Power Generating Effluent Limitations Guidelines. In 2015, the EPA issued revised federal effluent limitation guidelines (ELG) for steam electric power generating stations under the Clean Water Act. It set effluent limits and prescribed Best Available Control Technology (BACT) for several wastewater streams, including flue gas desulphurization (FGD) water, bottom ash transport water and coal combustion landfill leachate. In October 2020, the EPA published a final ELG Rule allowing re-use of bottom ash transport water in FGD scrubber systems with limited discharges related to maintaining system water balance. The rule set technology standards and numerical pollutant limits for discharges of bottom ash transport water and FGD wastewater. Compliance deadlines depend on subcategory, with compliance generally required as soon as possible, beginning after October 13, 2021, but no later than December 31, 2025, or December 31, 2028, in some specific cases.

On April 25, 2024, the EPA released a pre-publication version of a final ELG rule to update the 2020 ELGs. In the final rule, the EPA is revising ELGs for existing sources, including establishing zero discharge limitations for bottom ash transport water, FGD wastewater, and combustion residual leachate, and allowing states to set discharge limits for legacy wastewater in surface impoundments based on best professional judgment. The rule proposes to maintain exemptions for units permanently ceasing coal combustion by 2028, and adds a new subcategory for units that have already complied with either the 2015 or 2020 ELG rules and which will retire by 2032. The final ELG rule also establishes mercury and arsenic limitations for functionally equivalent discharges of leachate via groundwater to surface water. Compliance deadlines are determined by the applicable state permitting authority. Compliance deadlines could be required as soon as 60 days after the final rule is published in the Federal Register, but no later than December 31, 2029.

Bottom ash transport and FGD wastewater ELGs are not expected to have a significant impact on Minnesota Power operations. Zero leachate discharge requirements have the potential to impact dewatering associated with the closed Taconite Harbor dry ash landfill and Laskin’s closed Cell E impoundment. New limitations for arsenic and mercury related to functionally equivalent (groundwater to surface water) discharges are not currently anticipated to impact Minnesota Power facilities.

We estimate no additional material compliance costs for ELG bottom ash water and FGD requirements. Compliance costs we might incur related to other ELG waste streams (e.g., leachate) or other potential future water discharge regulations at Minnesota Power facilities cannot be estimated; however, the costs could be material, including costs associated with wastewater treatment and re-use. Minnesota Power would seek recovery of additional costs through a rate proceeding.

Permitted Water Discharges – Sulfate. In 2017, the MPCA released a draft water quality standard in an attempt to update Minnesota’s existing 10 mg/L sulfate limit for waters used for the production of wild rice with the proposed rulemaking heard before an administrative law judge (ALJ). In 2018, the ALJ rejected significant portions of the proposed rulemaking and the MPCA subsequently withdrew the rulemaking. The existing 10 mg/L limit remains in place, but the MPCA is currently prohibited under state law from listing wild rice waters as impaired or requiring sulfate reduction technology.

The federal Clean Water Act requires the MPCA to update the state's impaired water list every two years. Beginning in 2021 through the latest draft approved by the EPA in April 2024, this list now includes Minnesota lakes and streams identified as wild rice waters that are listed for sulfate impairment. The list could subsequently be used to set sulfate limits in discharge permits for power generation facilities and municipal and industrial customers, including paper and pulp facilities, and mining operations. At this time, we are unable to determine the specific impacts these developments may have on Minnesota Power operations or its customers, if any. Minnesota Power would seek recovery of additional costs through a rate proceeding.

Solid and Hazardous Waste. The Resource Conservation and Recovery Act of 1976 regulates the management and disposal of solid and hazardous wastes. We are required to notify the EPA of hazardous waste activity and, consequently, routinely submit reports to the EPA.

Coal Ash Management Facilities. Minnesota Power produces the majority of its coal ash at Boswell, with small amounts of ash generated at Hibbard Renewable Energy Center. Ash storage and disposal methods include storing ash in clay-lined onsite impoundments (ash ponds), disposing of dry ash in a lined dry ash landfill, applying ash to land as an approved beneficial use, and trucking ash to state permitted landfills.


ALLETE, Inc. First Quarter 2024 Form 10-Q
23



NOTE 6. COMMITMENTS, GUARANTEES AND CONTINGENCIES (Continued)
Environmental Matters (Continued)

Coal Combustion Residuals from Electric Utilities (CCR). In 2015, the EPA published a final rule (2015 Rule) regulating CCR as nonhazardous waste under Subtitle D of the Resource Conservation and Recovery Act (RCRA) in the Federal Register. The rule included additional requirements for new landfill and impoundment construction as well as closure activities related to certain existing impoundments. Costs of compliance for Boswell and Laskin are expected to be incurred primarily over the next 12 years and be between approximately $65 million and $120 million. Compliance costs for CCR at Taconite Harbor are not expected to be material. Minnesota Power would seek recovery of additional costs through a rate proceeding.

Minnesota Power continues to work on minimizing compliance costs through evaluation of beneficial re-use and recycling of CCR. In 2018, a U.S. District Court for the District of Columbia decision vacated specific provisions of the CCR rule, which resulted in a change to the status of several existing clay-lined impoundments at Boswell being considered unlined. In September 2020, the EPA finalized the CCR Part A Rule, which required all unlined impoundments to cease disposal and initiate closure. Upon completion of dry ash conversion activities, Boswell ceased disposal in both impoundments in September 2022. Both impoundments are now inactive and have initiated closure.

On April 25, 2024, the EPA finalized the CCR Legacy Impoundment Rule. The final rule expands the scope of units regulated under the CCR rule to include legacy ponds (inactive surface impoundments at inactive facilities) and creates a new category of units called CCR management units, which includes inactive and closed impoundments and landfills as well as other non-containerized accumulations of CCR. The rule requires all regulated generating facilities to evaluate and identify past deposits of CCR materials on their sites and close or re-close existing CCR units to meet current closure standards, as well as install groundwater monitoring systems, conduct groundwater monitoring, and implement groundwater corrective actions as necessary. Additionally, the EPA finalized portions of the proposed CCR Part B Rule, which allows CCR Units to certify closure while conducting groundwater remediation activities. This rule is currently under review; however impacts to previously closed CCR Units at Boswell and Laskin are anticipated. Compliance costs for Minnesota Power facilities cannot be estimated at this time; however, the costs could be material. Minnesota Power would seek recovery of additional costs through a rate proceeding.

Additionally, the EPA released a proposed CCR Part B rulemaking in February 2020 addressing options for beneficial reuse of CCR materials, alternative liner demonstrations and other CCR regulatory revisions. Portions of the Part B rule addressing alternative liner equivalency standards were finalized in November 2020. Finalization of the remaining beneficial reuse requirements are expected in late 2024. The final CCR federal permit rule is expected in the first half of 2026. The final federal permit rule will finalize procedures for implementing a CCR federal permit program.

Other Environmental Matters.

Manufactured Gas Plant Site. We are reviewing and addressing environmental conditions at a former manufactured gas plant site located in Superior, Wisconsin, and formerly operated by SWL&P. SWL&P has been working with the Wisconsin Department of Natural Resources (WDNR) in determining the extent and location of contamination at the site and surrounding properties. As of March 31, 2024, SWL&P has recorded a liability of approximately $1 million for remediation costs at this site. SWL&P has recorded the recovery of the remediation costs associated with the site as a regulatory asset as we expect recovery of these costs to be allowed by the PSCW.

Other Matters.

Letters of Credit, Surety Bonds and Other Indemnifications.

We have multiple credit facility agreements in place that provide the ability to issue standby letters of credit to satisfy contractual security requirements across our businesses. As of March 31, 2024, we had $150.1 million of outstanding letters of credit issued, including those issued under our revolving credit facility. We do not believe it is likely that any of these outstanding letters of credit will be drawn upon.

In April 2024, under the tax credit transferability provision of the Inflation Reduction Act, we entered into an agreement with a third party to sell a portion of our production tax credits. ALLETE has indemnified the third party for the value of production tax credits sold to date of approximately $14 million.

Regulated Operations. As of March 31, 2024, we had $25.4 million outstanding in standby letters of credit at our Regulated Operations which are pledged as security to MISO, the NDPSC and state agencies.
ALLETE, Inc. First Quarter 2024 Form 10-Q
24



NOTE 6. COMMITMENTS, GUARANTEES AND CONTINGENCIES (Continued)
Other Matters (Continued)

ALLETE Clean Energy. ALLETE Clean Energy is party to PSAs that expire in various years between 2024 and 2039. As of March 31, 2024, ALLETE Clean Energy has $80.6 million outstanding in standby letters of credit, the majority of which are pledged as security under these PSAs.

Corporate and Other.

BNI Energy. As of March 31, 2024, BNI Energy had surety bonds outstanding of $82.4 million related to the reclamation liability for closing costs associated with its mine and mine facilities. Although its coal supply agreements obligate the customers to provide for the closing costs, additional assurance is required by federal and state regulations. BNI Energy’s total reclamation liability is currently estimated at $82.1 million. BNI Energy does not believe it is likely that any of these outstanding surety bonds will be drawn upon.

Investment in Nobles 2. The Nobles 2 wind energy facility requires standby letters of credit as security for certain contractual obligations. As of March 31, 2024, ALLETE South Wind has $10.1 million outstanding in standby letters of credit, related to its portion of the security requirements relative to its ownership in Nobles 2.

South Shore Energy. As of March 31, 2024, South Shore Energy had $29.7 million outstanding in standby letters of credit pledged as security in connection with the development of NTEC.

Legal Proceedings.

We are involved in litigation arising in the normal course of business. Also in the normal course of business, we are involved in tax, regulatory and other governmental audits, inspections, investigations and other proceedings that involve state and federal taxes, safety, and compliance with regulations, rate base and cost of service issues, among other things. We do not expect the outcome of these matters to have a material effect on our financial position, results of operations or cash flows.


NOTE 7. EARNINGS PER SHARE AND COMMON STOCK

We compute basic earnings per share using the weighted average number of shares of common stock outstanding during each period. The difference between basic and diluted earnings per share, if any, arises from non-vested restricted stock units and performance share awards granted under our Executive Long-Term Incentive Compensation Plan.
Three Months Ended March 31, 2024  2023 
Reconciliation of Basic and Diluted Dilutive  Dilutive 
Earnings Per ShareBasicSecuritiesDilutedBasicSecuritiesDiluted
Millions Except Per Share Amounts      
Net Income Attributable to ALLETE$50.7 $50.7 $58.2 $58.2 
Average Common Shares57.6 0.1 57.7 57.3  57.3 
Earnings Per Share$0.88 $0.88 $1.02 $1.02 
ALLETE, Inc. First Quarter 2024 Form 10-Q
25



NOTE 8. INCOME TAX EXPENSE
Three Months Ended
March 31,
 20242023
Millions  
Current Income Tax Expense  
Federal (a)
$3.5$5.6
State3.42.2
Total Current Income Tax Expense$6.9$7.8
Deferred Income Tax Expense (Benefit)  
Federal (b)
$(5.0)$(8.3)
State2.42.1
Investment Tax Credit Amortization(0.3)(0.1)
Total Deferred Income Tax Benefit$(2.9)$(6.3)
Total Income Tax Expense$4.0$1.5
(a)For the three months ended March 31, 2024 and 2023, the federal current tax expense was partially offset by production tax credits.
(b)For the three months ended March 31, 2024 and 2023, the federal income tax benefit is primarily due to production tax credits.

The Company's tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items arising in that quarter. In each quarter, the Company updates its estimate of the annual effective tax rate and if the estimated annual effective tax rate changes, the Company would make a cumulative adjustment in that quarter.

Three Months Ended
Reconciliation of Taxes from Federal StatutoryMarch 31,
Rate to Total Income Tax Expense20242023
Millions  
Income Before Income Taxes$41.0 $39.1 
Statutory Federal Income Tax Rate21 %21 %
Income Taxes Computed at Statutory Federal Rate$8.6 $8.2 
Increase (Decrease) in Income Tax Due to:
State Income Taxes – Net of Federal Income Tax Benefit4.6 3.4 
Production Tax Credits (a)
(11.6)(10.4)
Investment Tax Credits (a)
(0.3)(2.2)
Regulatory Differences – Excess Deferred Tax(3.5)(2.8)
Non-Controlling Interest in Subsidiaries2.8 3.8 
AFUDC – Equity(0.6)(0.3)
Other4.0 1.8 
Total Income Tax Expense$4.0 $1.5 
(a)For the three months ended March 31, 2024 and 2023, the credits are presented net of any estimated discount on the sale of certain credits.

For the three months ended March 31, 2024, the effective tax rate was 9.7 percent (3.8 percent for the three months ended March 31, 2023). The effective tax rates for 2024 and 2023 were primarily impacted by production tax credits.

Uncertain Tax Positions. As of March 31, 2024, we had gross unrecognized tax benefits of $1.1 million ($1.1 million as of December 31, 2023). Of the total gross unrecognized tax benefits, $0.6 million represents the amount of unrecognized tax benefits included on the Consolidated Balance Sheet that, if recognized, would favorably impact the effective income tax rate. The unrecognized tax benefit amounts have been presented as an increase to the net deferred tax liability on the Consolidated Balance Sheet.

ALLETE and its subsidiaries file a consolidated federal income tax return as well as combined and separate state income tax returns in various jurisdictions. ALLETE is currently under examination by the state of Minnesota for the tax years 2020 through 2022. ALLETE has no open federal audits and is no longer subject to federal examination for years before 2021 or state examination for years before 2020. Additionally, the statute of limitations related to the federal tax credit carryforwards will remain open until those credits are utilized in subsequent returns.
ALLETE, Inc. First Quarter 2024 Form 10-Q
26



NOTE 9. PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS
Components of Net Periodic Benefit Cost (Credit)PensionOther
Postretirement
Three Months Ended March 31,2024202320242023
Millions    
Service Cost$1.6 $1.6 $0.4 $0.6 
Non-Service Cost Components (a)
Interest Cost 9.7 10.1 1.0 1.5 
Expected Return on Plan Assets (11.2)(10.9)(2.8)(2.8)
Amortization of Prior Service Credits   (2.9)(1.8)
Amortization of Net Loss1.6 1.4 (0.8)(0.5)
Net Periodic Benefit Cost (Credit)$1.7 $2.2 $(5.1)$(3.0)
(a)These components of net periodic benefit cost (credit) are included in the line item “Other” under Other Income (Expense) on the Consolidated Statement of Income.

Employer Contributions. For the three months ended March 31, 2024, we contributed $25.0 million in cash to the defined benefit pension plans ($6.5 million for the three months ended March 31, 2023); we do not expect to make additional contributions to our defined benefit pension plans in 2024. For the three months ended March 31, 2024 and 2023, we made no contributions to our other postretirement benefit plans; we do not expect to make any contributions to our other postretirement benefit plans in 2024.


NOTE 10. BUSINESS SEGMENTS

We present two reportable segments: Regulated Operations and ALLETE Clean Energy. We measure performance of our operations through budgeting and monitoring of contributions to consolidated net income by each business segment.

Regulated Operations includes three operating segments which consist of our regulated utilities, Minnesota Power and SWL&P, as well as our investment in ATC. ALLETE Clean Energy is our business focused on developing, acquiring and operating clean and renewable energy projects. We also present Corporate and Other which includes New Energy, a renewable energy development company, BNI Energy, our coal mining operations in North Dakota, ALLETE Properties, our legacy Florida real estate investment, along with our investment in Nobles 2, South Shore Energy, our non-rate regulated, Wisconsin subsidiary developing NTEC, other business development and corporate expenditures, unallocated interest expense, a small amount of non-rate base generation, land holdings in Minnesota, and earnings on cash and investments.

ALLETE, Inc. First Quarter 2024 Form 10-Q
27



NOTE 10. BUSINESS SEGMENTS (Continued)

Three Months Ended
March 31,
 20242023
Millions
Operating Revenue
Regulated Operations
Residential$51.5 $49.4 
Commercial49.7 47.7 
Municipal9.0 8.9 
Industrial159.5 144.9 
Other Power Suppliers40.0 35.9 
Other28.6 25.8 
Total Regulated Operations338.3 312.6 
ALLETE Clean Energy
Long-term PSA17.8 18.4 
Sale of Wind Energy Facilities 181.8 
Other1.3 1.3 
Total ALLETE Clean Energy19.1 201.5 
Corporate and Other
Long-term Contract25.4 25.5 
Sale of Renewable Development Projects13.9 19.8 
Other6.6 5.5 
Total Corporate and Other45.9 50.8 
Total Operating Revenue$403.3 $564.9 
Net Income Attributable to ALLETE
Regulated Operations$44.2 $40.6 
ALLETE Clean Energy3.8 8.5 
Corporate and Other2.7 9.1 
Total Net Income Attributable to ALLETE$50.7 $58.2 

March 31,
2024
December 31,
2023
Millions
Assets
Regulated Operations $4,345.1 $4,335.0 
ALLETE Clean Energy 1,580.0 1,594.1 
Corporate and Other679.5 727.3 
Total Assets $6,604.6 $6,656.4 

ALLETE, Inc. First Quarter 2024 Form 10-Q
28



NOTE 11. SUBSEQUENT EVENT – AGREEMENT AND PLAN OF MERGER

On May 5, 2024, ALLETE entered into the Merger Agreement. Pursuant to the Merger Agreement, on the terms and subject to the conditions set forth therein, Alloy Merger Sub will merge with and into ALLETE, with ALLETE continuing as the surviving corporation in the Merger and becoming a subsidiary of Alloy Parent.

Subject to the terms and conditions set forth in the Merger Agreement, which has been unanimously approved by the board of directors of ALLETE, at the effective time of the Merger (Effective Time), each share of common stock, without par value, of ALLETE (ALLETE common stock) issued and outstanding immediately prior to the Effective Time (other than shares of ALLETE common stock held by any holder who properly exercises dissenters’ rights under Minnesota law in respect of such shares and any shares of ALLETE common stock held by an affiliate of Alloy Parent) shall be converted into the right to receive $67.00 in cash, without interest (Merger Consideration). The aggregate equity value of the ALLETE common stock acquired by Parent will be approximately $3.9 billion as calculated as of May 5, 2024.

In addition, at the Effective Time, each restricted stock unit with respect to ALLETE common stock subject to time-based vesting that is outstanding immediately prior to the Effective Time (RSU) will be cancelled and converted into a contingent right to receive an amount in cash, without interest, equal to the Merger Consideration, payable (i) in the case of such right converted from unvested RSUs, upon the same vesting conditions as applied to the corresponding RSU or (ii) in the case of such right converted from vested RSUs, as soon as reasonably practicable following the closing date of the Merger (the Closing Date). Each performance share award with respect to ALLETE common stock that is outstanding and unvested immediately prior to the Effective Time will be cancelled and converted into a right to receive, without interest, the Merger Consideration multiplied by the number of shares of ALLETE common stock subject to the award, determined based on attainment of the greater of target and actual performance as of the last business day immediately preceding the Closing Date. A pro rata portion (based on the elapsed portion of the performance period at that time) of the converted performance share awards will be paid out as soon as reasonably practicable following the Closing Date, with the remainder of the award being subject to time-vesting for the remainder of the applicable performance period. Further, purchase rights accumulated during the offering period in effect under the Company’s Employee Stock Purchase Plan (ESPP) immediately prior to closing will be automatically exercised into shares of ALLETE common stock no later than five business days prior to the Closing Date, and the ESPP will be terminated as of immediately prior to the Closing Date.

Consummation of the Merger is subject to various closing conditions, including: (1) approval of the shareholders of the Company; (2) receipt of all required regulatory approvals without the imposition of a Burdensome Condition (as defined in the Merger Agreement); (3) absence of any law or order prohibiting the consummation of the Merger; (4) subject to materiality qualifiers, the accuracy of each party’s representations and warranties; (5) each party’s compliance in all material respects with its obligations and covenants under the Merger Agreement; and (6) the absence of a material adverse effect with respect to the Company. The Merger Agreement contains certain termination rights for ALLETE and Alloy Parent, which were described in a Current Report of Form 8-K filed by ALLETE on May 6, 2024. In the Merger Agreement, among other things, ALLETE has agreed, subject to certain exceptions, to, and to cause each of its subsidiaries to conduct its business in the ordinary course, consistent with past practice, from the date of the Merger Agreement until the Effective Time, and not to take certain actions prior to the closing of the Merger without the prior written consent of Alloy Parent (which consent shall not be unreasonably withheld, conditioned or delayed, except where ALLETE seeks Alloy Parent’s consent to enter into a material new line of business or cease operations of an existing material line of business). The Merger Agreement also provides that the Company may request that Alloy Parent purchase up to a total of $300 million of preferred stock of the Company in the second half of 2025, subject to certain parameters. If Alloy Parent declines to purchase the preferred stock, the Company will have the right to issue Company common stock up to certain limits.





ALLETE, Inc. First Quarter 2024 Form 10-Q
29



ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL
CONDITION AND RESULTS OF OPERATIONS

OVERVIEW

The following discussion should be read in conjunction with our Consolidated Financial Statements and notes to those statements, Management’s Discussion and Analysis of Financial Condition and Results of Operations from our 2023 Form 10-K and the other financial information appearing elsewhere in this report. In addition to historical information, the following discussion and other parts of this Form 10-Q contain forward-looking information that involves risks and uncertainties. Readers are cautioned that forward-looking statements should be read in conjunction with our disclosures in this Form 10-Q and our 2023 Form 10-K under the headings: “Forward-Looking Statements” located on page 7 and “Risk Factors” located in Part I, Item 1A, beginning on page 25 of our 2023 Form 10-K. The risks and uncertainties described in this Form 10-Q and our 2023 Form 10-K are not the only risks facing our Company. Additional risks and uncertainties that we are not presently aware of, or that we currently consider immaterial, may also affect our business operations. Our business, financial condition or results of operations could suffer if the risks are realized.

On May 5, 2024, ALLETE entered into the Merger Agreement. (See Note 11. Subsequent Event – Agreement and Plan of Merger.)

Regulated Operations includes our regulated utilities, Minnesota Power and SWL&P, as well as our investment in ATC, a Wisconsin-based regulated utility that owns and maintains electric transmission assets in portions of Wisconsin, Michigan, Minnesota and Illinois. Minnesota Power provides regulated utility electric service in northeastern Minnesota to approximately 150,000 retail customers. Minnesota Power also has 14 non-affiliated municipal customers in Minnesota. SWL&P is a Wisconsin utility and a wholesale customer of Minnesota Power. SWL&P provides regulated utility electric, natural gas and water service in northwestern Wisconsin to approximately 15,000 electric customers, 13,000 natural gas customers and 10,000 water customers. Our regulated utility operations include retail and wholesale activities under the jurisdiction of state and federal regulatory authorities. (See Note 2. Regulatory Matters.)

ALLETE Clean Energy focuses on developing, acquiring, and operating clean and renewable energy projects. ALLETE Clean Energy currently owns and operates, in seven states, more than 1,200 MW of nameplate capacity wind energy generation with a majority contracted under PSAs of various durations. In addition, ALLETE Clean Energy also engages in the development of wind energy facilities to operate under long-term PSAs or for sale to others upon completion.

Corporate and Other is comprised of New Energy, a renewable development company; our investment in Nobles 2, an entity that owns and operates a 250 MW wind energy facility in southwestern Minnesota; South Shore Energy, our non-rate regulated, Wisconsin subsidiary developing NTEC, an approximately 600 MW proposed combined-cycle natural gas-fired generating facility; BNI Energy, our coal mining operations in North Dakota; ALLETE Properties, our legacy Florida real estate investment; other business development and corporate expenditures; unallocated interest expense; a small amount of non-rate base generation; land holdings in Minnesota; and earnings on cash and investments.

ALLETE is incorporated under the laws of Minnesota. Our corporate headquarters are in Duluth, Minnesota. Statistical information is presented as of March 31, 2024, unless otherwise indicated. All subsidiaries are wholly-owned unless otherwise specifically indicated. References in this report to “we,” “us” and “our” are to ALLETE and its subsidiaries, collectively.

Financial Overview

The following net income discussion summarizes a comparison of the three months ended March 31, 2024, to the three months ended March 31, 2023.

Net income attributable to ALLETE for the three months ended March 31, 2024, was $50.7 million, or $0.88 per diluted share, compared to $58.2 million, or $1.02 per diluted share, for the same period in 2023. Net income in 2024 includes interim rate refund reserves of $3.9 million after-tax, or $0.07 per share, due to Minnesota Power’s rate case settlement. (See Note 2. Regulatory Matters.) Net income in 2024 also includes transaction costs of $1.2 million after-tax, or $0.02 per share, related to the Merger. (See Note 11. Subsequent Event – Agreement and Plan of Merger.)





ALLETE, Inc. First Quarter 2024 Form 10-Q
30



ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL
CONDITION AND RESULTS OF OPERATIONS (Continued)

Regulated Operations net income attributable to ALLETE was $44.2 million for the three months ended March 31, 2024, compared to $40.6 million for the same period in 2023. Net income at Minnesota Power was higher than 2023 primarily due to the implementation of interim rates on January 1, 2024, net of reserves related to Minnesota Power’s rate case settlement. (See Note 2. Regulatory Matters.) This increase was partially offset by higher operating and maintenance and depreciation expenses. Net income at SWL&P and our after-tax equity earnings in ATC were similar to 2023. (See Note 3. Equity Investments.)

ALLETE Clean Energy net income attributable to ALLETE was $3.8 million for the three months ended March 31, 2024, compared to $8.5 million for the same period in 2023. Net income in 2024 reflected a forced outage located near its Caddo wind energy facility and a transformer outage at its Diamond Spring wind energy facility resulting in lower earnings. These decreases were partially offset by lower operating and maintenance expense.

Corporate and Other net income attributable to ALLETE was $2.7 million for the three months ended March 31, 2024, compared to $9.1 million for the same period in 2023. Net income in 2024 reflects lower earnings from Minnesota solar projects as investment tax credits were recognized in 2023 for the projects. Net income in 2024 also reflects higher income taxes and interest expense compared to 2023. Net income in 2024 also includes transaction costs of $1.2 million after-tax related to the Merger. (See Note 11. Subsequent Event – Agreement and Plan of Merger.) Net income at New Energy was $4.0 million in 2024 compared to $4.1 million in 2023.


COMPARISON OF THE THREE MONTHS ENDED MARCH 31, 2024 AND 2023

(See Note 10. Business Segments for financial results by segment.)

Regulated Operations

Three Months Ended March 31,20242023
Millions  
Operating Revenue – Utility$338.3 $312.6 
Fuel, Purchased Power and Gas – Utility133.7 118.6 
Transmission Services – Utility22.7 20.1 
Operating and Maintenance66.8 61.9 
Depreciation and Amortization46.4 44.5 
Taxes Other than Income Taxes15.7 15.9 
Operating Income53.0 51.6 
Interest Expense(16.0)(15.5)
Equity Earnings5.7 6.0 
Other Income6.4 2.5 
Income Before Income Taxes49.1 44.6 
Income Tax Expense4.9 4.0 
Net Income Attributable to ALLETE$44.2 $40.6 


ALLETE, Inc. First Quarter 2024 Form 10-Q
31



COMPARISON OF THE THREE MONTHS ENDED MARCH 31, 2024 AND 2023 (Continued)
Regulated Operations (Continued)

Operating Revenue Utility increased $25.7 million from 2023 primarily due to the implementation of interim rates on January 1, 2024, as well as higher fuel adjustment clause recoveries and kWh sales, partially offset by lower cost recovery rider revenue and gas sales.

Interim retail rates for Minnesota Power, subject to refund, were approved by the MPUC and became effective January 1, 2024, resulting in revenue of $11.2 million, net of reserves related to Minnesota Power’s rate case settlement and rider revenue incorporated into base rates. (See Note 2. Regulatory Matters.)

Fuel adjustment clause revenue increased $8.4 million due to higher fuel and purchased power costs attributable to retail and municipal customers. (See Fuel, Purchased Power and Gas – Utility.)

Higher kWh sales increased revenue by $7.8 million from 2023 reflecting higher sales to industrial customers and other power suppliers as well as higher market prices, partially offset by lower sales to residential, commercial and municipal customers. Sales to industrial customers increased primarily due to higher sales to taconite customers reflecting Cliff’s Northshore mine operating in 2024 compared to being idled in the first quarter of 2023. Sales to other power suppliers, which are sold at market-based prices into the MISO market on a daily basis or through PSAs of various durations, increased reflecting more market sales and higher market prices in 2024 compared to 2023. Sales to residential, commercial and municipal customers decreased from 2023 primarily due to warmer weather in 2024 compared to 2023.

Kilowatt-hours Sold Variance
Three Months Ended March 31,20242023Quantity%
Millions    
Regulated Utility    
Retail and Municipal    
Residential306 321 (15)(4.7)%
Commercial338 347 (9)(2.6)%
Industrial1,798 1,658 140 8.4 %
Municipal125 128 (3)(2.3)%
Total Retail and Municipal2,567 2,454 113 4.6 %
Other Power Suppliers757 696 61 8.8 %
Total Regulated Utility Kilowatt-hours Sold3,324 3,150 174 5.5 %

Revenue from electric sales to taconite customers accounted for 32 percent of regulated operating revenue in 2024 (30 percent in 2023). Revenue from electric sales to paper, pulp and secondary wood product customers accounted for 5 percent of regulated operating revenue in 2024 (4 percent in 2023). Revenue from electric sales to pipelines and other industrial customers accounted for 10 percent of regulated operating revenue in 2024 (11 percent in 2023).

Revenue from gas sales at SWL&P decreased $4.2 million reflecting fewer gas sales resulting from warmer weather and lower gas prices in 2024 compared to 2023. (See Fuel, Purchased Power and Gas – Utility.)

Operating Expenses increased $24.3 million, or 9 percent, from 2023.

Fuel, Purchased Power and Gas – Utility expense increased $15.1 million, or 13 percent, from 2023 primarily due to higher kWh sales, purchased power prices and fuel costs. These increases were partially offset by lower gas sales and prices.

Transmission Services – Utility expense increased $2.6 million, or 13 percent, from 2023 primarily due to higher MISO-related expense.

Operating and Maintenance expense increased $4.9 million, or 8 percent, from 2023 primarily due to higher salaries and wages, benefit costs, and contract and professional services.

Depreciation and Amortization expense increased $1.9 million, or 4 percent, from 2023 primarily due to a higher plant in service balance in 2024.

ALLETE, Inc. First Quarter 2024 Form 10-Q
32



COMPARISON OF THE THREE MONTHS ENDED MARCH 31, 2024 AND 2023 (Continued)
Regulated Operations (Continued)

Other Income increased $3.9 million from 2023 reflecting lower pension and other postretirement benefit plan non-service costs.

Income Tax Expense increased $0.9 million from 2023 primarily due to higher pre-tax income.


ALLETE Clean Energy
Three Months Ended March 31,20242023
Millions  
Operating Revenue
Contracts with Customers – Non-utility$17.8 $200.2 
Other – Non-utility (a)
1.3 1.3 
Cost of Sales – Non-utility— 181.6 
Operating and Maintenance13.5 14.3 
Depreciation and Amortization14.1 14.4 
Taxes Other than Income Taxes2.6 2.9 
Operating Loss(11.1)(11.7)
Interest Expense(0.1)(0.3)
Other Income1.6 0.2 
Loss Before Income Taxes(9.6)(11.8)
Income Tax Benefit(5.5)(3.0)
Net Loss(4.1)(8.8)
Net Loss Attributable to Non-Controlling Interest