INSTRUCTIONS FOR FILING FERC FORM NOS. 1 and 3-Q

GENERAL INFORMATION

Purpose
FERC Form No. 1 (FERC Form 1) is an annual regulatory requirement for Major electric utilities, licensees and others (18 C.F.R. § 141.1). FERC Form No. 3-Q ( FERC Form 3-Q) is a quarterly regulatory requirement which supplements the annual financial reporting requirement (18 C.F.R. § 141.400). These reports are designed to collect financial and operational information from electric utilities, licensees and others subject to the jurisdiction of the Federal Energy Regulatory Commission. These reports are also considered to be non-confidential public use forms.
Who Must Submit
Each Major electric utility, licensee, or other, as classified in the Commission’s Uniform System of Accounts Prescribed for Public Utilities, Licensees, and Others Subject To the Provisions of The Federal Power Act (18 C.F.R. Part 101), must submit FERC Form 1 (18 C.F.R. § 141.1), and FERC Form 3-Q (18 C.F.R. § 141.400).
Note: Major means having, in each of the three previous calendar years, sales or transmission service that exceeds one of the following:
1. one million megawatt hours of total annual sales,
2. 100 megawatt hours of annual sales for resale,
3. 500 megawatt hours of annual power exchanges delivered, or
4. 500 megawatt hours of annual wheeling for others (deliveries plus losses).

What and Where to Submit

Submit FERC Form Nos. 1 and 3-Q electronically through the eCollection portal at https://eCollection.ferc.gov, and according to the specifications in the Form 1 and 3-Q taxonomies.
The Corporate Officer Certification must be submitted electronically as part of the FERC Forms 1 and 3-Q filings.
Submit immediately upon publication, by either eFiling or mail, two (2) copies to the Secretary of the Commission, the latest Annual Report to Stockholders. Unless eFiling the Annual Report to Stockholders, mail the stockholders report to the Secretary of the Commission at:
Secretary
Federal Energy Regulatory Commission 888 First Street, NE
Washington, DC 20426

For the CPA Certification Statement, submit within 30 days after filing the FERC Form 1, a letter or report (not applicable to filers classified as Class C or Class D prior to January 1, 1984). The CPA Certification Statement can be either eFiled or mailed to the Secretary of the Commission at the address above.

The CPA Certification Statement should:

Attest to the conformity, in all material aspects, of the below listed (schedules and pages) with the Commission's applicable Uniform System of Accounts (including applicable notes relating thereto and the Chief Accountant's published accounting releases), and

Be signed by independent certified public accountants or an independent licensed public accountant certified or licensed by a regulatory authority of a State or other political subdivision of the U. S. (See 18 C.F.R. §§ 41.10-41.12 for specific qualifications.)

Schedules	Pages
Comparative Balance Sheet	110-113
Statement of Income	114-117
Statement of Retained Earnings	118-119
Statement of Cash Flows	120-121
Notes to Financial Statements	122-123

The following format must be used for the CPA Certification Statement unless unusual circumstances or conditions, explained in the letter or report, demand that it be varied. Insert parenthetical phrases only when exceptions are reported.
“In connection with our regular examination of the financial statements of [COMPANY NAME] for the year ended on which we have reported separately under date of [DATE], we have also reviewed schedules [NAME OF SCHEDULES] of FERC Form No. 1 for the year filed with the Federal Energy Regulatory Commission, for conformity in all material respects with the requirements of the Federal Energy Regulatory Commission as set forth in its applicable Uniform System of Accounts and published accounting releases. Our review for this purpose included such tests of the accounting records and such other auditing procedures as we considered necessary in the circumstances.
Based on our review, in our opinion the accompanying schedules identified in the preceding paragraph (except as noted below) conform in all material respects with the accounting requirements of the Federal Energy Regulatory Commission as set forth in its applicable Uniform System of Accounts and published accounting releases.” The letter or report must state which, if any, of the pages above do not conform to the Commission’s requirements. Describe the discrepancies that exist.
Filers are encouraged to file their Annual Report to Stockholders, and the CPA Certification Statement using eFiling. Further instructions are found on the Commission’s website at https://www.ferc.gov/ferc-online/ferc-online/frequently-asked-questions-faqs-efilingferc-online.
Federal, State, and Local Governments and other authorized users may obtain additional blank copies of FERC Form 1 and 3-Q free of charge from https://www.ferc.gov/general-information-0/electric-industry-forms.

When to Submit
FERC Forms 1 and 3-Q must be filed by the following schedule:
1. FERC Form 1 for each year ending December 31 must be filed by April 18th of the following year (18 CFR § 141.1), and
2. FERC Form 3-Q for each calendar quarter must be filed within 60 days after the reporting quarter (18 C.F.R. § 141.400).
Where to Send Comments on Public Reporting Burden.
The public reporting burden for the FERC Form 1 collection of information is estimated to average 1,168 hours per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data-needed, and completing and reviewing the collection of information. The public reporting burden for the FERC Form 3-Q collection of information is estimated to average 168 hours per response.
Send comments regarding these burden estimates or any aspect of these collections of information, including suggestions for reducing burden, to the Federal Energy Regulatory Commission, 888 First Street NE, Washington, DC 20426 (Attention: Information Clearance Officer); and to the Office of Information and Regulatory Affairs, Office of Management and Budget, Washington, DC 20503 (Attention: Desk Officer for the Federal Energy Regulatory Commission). No person shall be subject to any penalty if any collection of information does not display a valid control number (44 U.S.C. § 3512 (a)).

GENERAL INSTRUCTIONS

Prepare this report in conformity with the Uniform System of Accounts (18 CFR Part 101) (USofA). Interpret all accounting words and phrases in accordance with the USofA.
Enter in whole numbers (dollars or MWH) only, except where otherwise noted. (Enter cents for averages and figures per unit where cents are important. The truncating of cents is allowed except on the four basic financial statements where rounding is required.) The amounts shown on all supporting pages must agree with the amounts entered on the statements that they support. When applying thresholds to determine significance for reporting purposes, use for balance sheet accounts the balances at the end of the current reporting period, and use for statement of income accounts the current year's year to date amounts.
Complete each question fully and accurately, even if it has been answered in a previous report. Enter the word "None" where it truly and completely states the fact.
For any page(s) that is not applicable to the respondent, omit the page(s) and enter "NA," "NONE," or "Not Applicable" in column (d) on the List of Schedules, pages 2 and 3.
Enter the month, day, and year for all dates. Use customary abbreviations. The "Date of Report" included in the header of each page is to be completed only for resubmissions (see VII. below).
Generally, except for certain schedules, all numbers, whether they are expected to be debits or credits, must be reported as positive. Numbers having a sign that is different from the expected sign must be reported by enclosing the numbers in parentheses.
For any resubmissions, please explain the reason for the resubmission in a footnote to the data field.
Do not make references to reports of previous periods/years or to other reports in lieu of required entries, except as specifically authorized.
Wherever (schedule) pages refer to figures from a previous period/year, the figures reported must be based upon those shown by the report of the previous period/year, or an appropriate explanation given as to why the different figures were used.
Schedule specific instructions are found in the applicable taxonomy and on the applicable blank rendered form.

Definitions for statistical classifications used for completing schedules for transmission system reporting are as follows:

FNS - Firm Network Transmission Service for Self. "Firm" means service that can not be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. "Network Service" is Network Transmission Service as described in Order No. 888 and the Open Access Transmission Tariff. "Self" means the respondent.

FNO - Firm Network Service for Others. "Firm" means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. "Network Service" is Network Transmission Service as described in Order No. 888 and the Open Access Transmission Tariff.

LFP - for Long-Term Firm Point-to-Point Transmission Reservations. "Long-Term" means one year or longer and” firm" means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. "Point-to-Point Transmission Reservations" are described in Order No. 888 and the Open Access Transmission Tariff. For all transactions identified as LFP, provide in a footnote the termination date of the contract defined as the earliest date either buyer or seller can unilaterally cancel the contract.

OLF - Other Long-Term Firm Transmission Service. Report service provided under contracts which do not conform to the terms of the Open Access Transmission Tariff. "Long-Term" means one year or longer and “firm” means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions. For all transactions identified as OLF, provide in a footnote the termination date of the contract defined as the earliest date either buyer or seller can unilaterally get out of the contract.

SFP - Short-Term Firm Point-to-Point Transmission Reservations. Use this classification for all firm point-to-point transmission reservations, where the duration of each period of reservation is less than one-year.

NF - Non-Firm Transmission Service, where firm means that service cannot be interrupted for economic reasons and is intended to remain reliable even under adverse conditions.

OS - Other Transmission Service. Use this classification only for those services which can not be placed in the above-mentioned classifications, such as all other service regardless of the length of the contract and service FERC Form. Describe the type of service in a footnote for each entry.

AD - Out-of-Period Adjustments. Use this code for any accounting adjustments or "true-ups" for service provided in prior reporting periods. Provide an explanation in a footnote for each adjustment.

DEFINITIONS

Commission Authorization (Comm. Auth.) -- The authorization of the Federal Energy Regulatory Commission, or any other Commission. Name the commission whose authorization was obtained and give date of the authorization.
Respondent -- The person, corporation, licensee, agency, authority, or other Legal entity or instrumentality in whose behalf the report is made.

EXCERPTS FROM THE LAW

Federal Power Act, 16 U.S.C. § 791a-825r

Sec. 3. The words defined in this section shall have the following meanings for purposes of this Act, to with:

’Corporation' means any corporation, joint-stock company, partnership, association, business trust, organized group of persons, whether incorporated or not, or a receiver or receivers, trustee or trustees of any of the foregoing. It shall not include 'municipalities, as hereinafter defined;
'Person' means an individual or a corporation;
'Licensee, means any person, State, or municipality Licensed under the provisions of section 4 of this Act, and any assignee or successor in interest thereof;

'municipality means a city, county, irrigation district, drainage district, or other political subdivision or agency of a State competent under the Laws thereof to carry and the business of developing, transmitting, unitizing, or distributing power; ......

"project' means. a complete unit of improvement or development, consisting of a power house, all water conduits, all dams and appurtenant works and structures (including navigation structures) which are a part of said unit, and all storage, diverting, or fore bay reservoirs directly connected therewith, the primary line or lines transmitting power there from to the point of junction with the distribution system or with the interconnected primary transmission system, all miscellaneous structures used and useful in connection with said unit or any part thereof, and all water rights, rights-of-way, ditches, dams, reservoirs, Lands, or interest in Lands the use and occupancy of which are necessary or appropriate in the maintenance and operation of such unit;

"Sec. 4. The Commission is hereby authorized and empowered

'To make investigations and to collect and record data concerning the utilization of the water 'resources of any region to be developed, the water-power industry and its relation to other industries and to interstate or foreign commerce, and concerning the location, capacity, development costs, and relation to markets of power sites; ... to the extent the Commission may deem necessary or useful for the purposes of this Act."

"Sec. 304.

Every Licensee and every public utility shall file with the Commission such annual and other periodic or special* reports as the Commission may by rules and regulations or other prescribe as necessary or appropriate to assist the Commission in the proper administration of this Act. The Commission may prescribe the manner and FERC Form in which such reports shall be made, and require from such persons specific answers to all questions upon which the Commission may need information. The Commission may require that such reports shall include, among other things, full information as to assets and Liabilities, capitalization, net investment, and reduction thereof, gross receipts, interest due and paid, depreciation, and other reserves, cost of project and other facilities, cost of maintenance and operation of the project and other facilities, cost of renewals and replacement of the project works and other facilities, depreciation, generation, transmission, distribution, delivery, use, and sale of electric energy. The Commission may require any such person to make adequate provision for currently determining such costs and other facts. Such reports shall be made under oath unless the Commission otherwise specifies*.10

"Sec. 309.

The Commission shall have power to perform any and all acts, and to prescribe, issue, make, and rescind such orders, rules and regulations as it may find necessary or appropriate to carry out the provisions of this Act. Among other things, such rules and regulations may define accounting, technical, and trade terms used in this Act; and may prescribe the FERC Form or FERC Forms of all statements, declarations, applications, and reports to be filed with the Commission, the information which they shall contain, and the time within which they shall be field..."

GENERAL PENALTIES

The Commission may assess up to $1 million per day per violation of its rules and regulations. See FPA § 316(a) (2005), 16 U.S.C. § 825o(a).

FERC FORM NO.

1/3-Q

REPORT OF MAJOR ELECTRIC UTILITIES, LICENSEES AND OTHER

Identification

01 Exact Legal Name of Respondent

NorthWestern Corporation

02 Year/ Period of Report

End of:

2026

03 Previous Name and Date of Change (If name changed during year)

04 Address of Principal Office at End of Period (Street, City, State, Zip Code)

3010 West 69th Street, Sioux Falls, SD 57108

05 Name of Contact Person

Evan VerWey

06 Title of Contact Person

Manager of Financial Reporting

07 Address of Contact Person (Street, City, State, Zip Code)

3010 West 69th Street, Sioux Falls, SD 57108

08 Telephone of Contact Person, Including Area Code

605-978-2906

09 This Report is An Original / A Resubmission

(1)

☑ An Original

(2)

☐ A Resubmission

10 Date of Report (Mo, Da, Yr)

03/31/2026

Quarterly Corporate Officer Certification

The undersigned officer certifies that:

I have examined this report and to the best of my knowledge, information, and belief all statements of fact contained in this report are correct statements of the business affairs of the respondent and the financial statements, and other financial information contained in this report, conform in all material respects to the Uniform System of Accounts.

01 Name

Jeff Berzina

02 Title

Controller

03 Signature

Jeff Berzina

04 Date Signed (Mo, Da, Yr)

05/07/2026

Title 18, U.S.C. 1001 makes it a crime for any person to knowingly and willingly to make to any Agency or Department of the United States any false, fictitious or fraudulent statements as to any matter within its jurisdiction.

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

List of Schedules
Enter in column (c) the terms "none," "not applicable," or "NA," as appropriate, where no information or amounts have been reported for certain pages. Omit pages where the respondents are "none," "not applicable," or "NA".
Line No.	Title of Schedule (a)	Reference Page No. (b)	Remarks (c)
	ScheduleIdentificationAbstract Identification	1
	ScheduleListOfSchedulesAbstract List of Schedules (Electric Utility)	2
1	ScheduleImportantChangesDuringTheQuarterYearAbstract Important Changes During the Quarter	108
2	ScheduleComparativeBalanceSheetAbstract Comparative Balance Sheet	110
3	ScheduleStatementOfIncomeAbstract Statement of Income for the Quarter	114
4	ScheduleRetainedEarningsAbstract Statement of Retained Earnings for the Quarter	118
5	ScheduleStatementOfCashFlowsAbstract Statement of Cash Flows	120
6	ScheduleNotesToFinancialStatementsAbstract Notes to Financial Statements	122
7	ScheduleStatementOfAccumulatedOtherComprehensiveIncomeAndHedgingActivitiesAbstract Statement of Accum Comp Income, Comp Income, and Hedging Activities	122a
8	ScheduleSummaryOfUtilityPlantAndAccumulatedProvisionsForDepreciationAmortizationAndDepletionAbstract Summary of Utility Plant & Accumulated Provisions for Dep, Amort & Dep	200
9	ScheduleElectricPlantInServiceAndAccumulatedProvisionForDepreciationByFunctionAbstract Electric Plant In Service and Accum Provision For Depr by Function	208
10	ScheduleTransmissionServiceAndGenerationInterconnectionStudyCostsAbstract Transmission Service and Generation Interconnection Study Costs	231
11	ScheduleOtherRegulatoryAssetsAbstract Other Regulatory Assets	232
12	ScheduleOtherRegulatoryLiabilitiesAbstract Other Regulatory Liabilities	278
13	ScheduleElectricOperatingRevenuesAbstract Elec Operating Revenues (Individual Schedule Lines 300-301)	300
14	ScheduleRegionalTransmissionServiceRevenuesAbstract Regional Transmission Service Revenues (Account 457.1)	302	Not Applicable
15	ScheduleElectricProductionOtherPowerTransmissionRegionalExpensesAbstract Electric Prod, Other Power Supply Exp, Trans and Distrib Exp	324
16	ScheduleElectricCustomerAccountServiceSalesAdministrativeAndGeneralExpensesAbstract Electric Customer Accts, Service, Sales, Admin and General Expenses	325
17	ScheduleTransmissionOfElectricityForOthersAbstract Transmission of Electricity for Others	328
18	ScheduleTransmissionOfElectricityByIsoOrRtoAbstract Transmission of Electricity by ISO/RTOs	331	Not Applicable
19	ScheduleTransmissionOfElectricityByOthersAbstract Transmission of Electricity by Others	332
20	ScheduleDepreciationDepletionAndAmortizationsAbstract Deprec, Depl and Amort of Elec Plant (403,403.1,404,and 405) (except Amortization of Acquisition Adjustments)	338
21	ScheduleAmountsIncludedInIsoOrRtoSettlementAbstract Amounts Included in ISO/RTO Settlement Statements	397	Not Applicable
22	ScheduleMonthlyPeaksAndOutputAbstract Monthly Peak Loads and Energy Output	399
23	ScheduleMonthlyTransmissionSystemPeakLoadAbstract Monthly Transmission System Peak Load	400
24	ScheduleMonthlyIsoOrRtoTransmissionSystemPeakLoadAbstract Monthly ISO/RTO Transmission System Peak Load	400a	Not Applicable

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

IMPORTANT CHANGES DURING THE QUARTER/YEAR
Give particulars (details) concerning the matters indicated below. Make the statements explicit and precise, and number them in accordance with the inquiries. Each inquiry should be answered. Enter "none," "not applicable," or "NA" where applicable. If information which answers an inquiry is given elsewhere in the report, make a reference to the schedule in which it appears. Changes in and important additions to franchise rights: Describe the actual consideration given therefore and state from whom the franchise rights were acquired. If acquired without the payment of consideration, state that fact. Acquisition of ownership in other companies by reorganization, merger, or consolidation with other companies: Give names of companies involved, particulars concerning the transactions, name of the Commission authorizing the transaction, and reference to Commission authorization. Purchase or sale of an operating unit or system: Give a brief description of the property, and of the transactions relating thereto, and reference to Commission authorization, if any was required. Give date journal entries called for by the Uniform System of Accounts were submitted to the Commission. Important leaseholds (other than leaseholds for natural gas lands) that have been acquired or given, assigned or surrendered: Give effective dates, lengths of terms, names of parties, rents, and other condition. State name of Commission authorizing lease and give reference to such authorization. Important extension or reduction of transmission or distribution system: State territory added or relinquished and date operations began or ceased and give reference to Commission authorization, if any was required. State also the approximate number of customers added or lost and approximate annual revenues of each class of service. Each natural gas company must also state major new continuing sources of gas made available to it from purchases, development, purchase contract or otherwise, giving location and approximate total gas volumes available, period of contracts, and other parties to any such arrangements, etc. Obligations incurred as a result of issuance of securities or assumption of liabilities or guarantees including issuance of short-term debt and commercial paper having a maturity of one year or less. Give reference to FERC or State Commission authorization, as appropriate, and the amount of obligation or guarantee. Changes in articles of incorporation or amendments to charter: Explain the nature and purpose of such changes or amendments. State the estimated annual effect and nature of any important wage scale changes during the year. State briefly the status of any materially important legal proceedings pending at the end of the year, and the results of any such proceedings culminated during the year. Describe briefly any materially important transactions of the respondent not disclosed elsewhere in this report in which an officer, director, security holder reported on Pages 104 or 105 of the Annual Report Form No. 1, voting trustee, associated company or known associate of any of these persons was a party or in which any such person had a material interest. (Reserved.) If the important changes during the year relating to the respondent company appearing in the annual report to stockholders are applicable in every respect and furnish the data required by Instructions 1 to 11 above, such notes may be included on this page. Describe fully any changes in officers, directors, major security holders and voting powers of the respondent that may have occurred during the reporting period. In the event that the respondent participates in a cash management program(s) and its proprietary capital ratio is less than 30 percent please describe the significant events or transactions causing the proprietary capital ratio to be less than 30 percent, and the extent to which the respondent has amounts loaned or money advanced to its parent, subsidiary, or affiliated companies through a cash management program(s). Additionally, please describe plans, if any to regain at least a 30 percent proprietary ratio.

1) None
2.) None
3.) Colstrip - Avista Interest Acquisition See footnote 2 - Regulatory Matters.
4.) None
5.) None
6.) See Note 3 "Financing Activities."
7.) None
8.) None
9.) See Note 5 "Commitments and Contingencies."
10.) None
12.) None
13) John Hines retired as Vice President of Supply effective January 2026. Mike Cashell retired as Vice President of Transmission effective April 2026.
14.) None

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

COMPARATIVE BALANCE SHEET (ASSETS AND OTHER DEBITS)
Line No.	Title of Account (a)	Ref. Page No. (b)	Current Year End of Quarter/Year Balance (c)	Prior Year End Balance 12/31 (d)
1	UtilityPlantAbstract UTILITY PLANT
2	UtilityPlant Utility Plant (101-106, 114)	200	7,836,064,270	7,472,772,542
3	ConstructionWorkInProgress Construction Work in Progress (107)	200	190,349,234	137,797,710
4	UtilityPlantAndConstructionWorkInProgress TOTAL Utility Plant (Enter Total of lines 2 and 3)		8,026,413,504	7,610,570,252
5	AccumulatedProvisionForDepreciationAmortizationAndDepletionOfPlantUtility (Less) Accum. Prov. for Depr. Amort. Depl. (108, 110, 111, 115)	200	2,938,588,976	2,567,943,202
6	UtilityPlantNet Net Utility Plant (Enter Total of line 4 less 5)		5,087,824,528	5,042,627,050
7	NuclearFuelInProcessOfRefinementConversionEnrichmentAndFabrication Nuclear Fuel in Process of Ref., Conv., Enrich., and Fab. (120.1)	202
8	NuclearFuelMaterialsAndAssembliesStockAccountMajorOnly Nuclear Fuel Materials and Assemblies-Stock Account (120.2)
9	NuclearFuelAssembliesInReactorMajorOnly Nuclear Fuel Assemblies in Reactor (120.3)
10	SpentNuclearFuelMajorOnly Spent Nuclear Fuel (120.4)
11	NuclearFuelUnderCapitalLeases Nuclear Fuel Under Capital Leases (120.6)
12	AccumulatedProvisionForAmortizationOfNuclearFuelAssemblies (Less) Accum. Prov. for Amort. of Nucl. Fuel Assemblies (120.5)	202
13	NuclearFuelNet Net Nuclear Fuel (Enter Total of lines 7-11 less 12)
14	UtilityPlantAndNuclearFuelNet Net Utility Plant (Enter Total of lines 6 and 13)		5,087,824,528	5,042,627,050
15	OtherElectricPlantAdjustments Utility Plant Adjustments (116)		273,855,612	273,855,612
16	GasStoredUndergroundNoncurrent Gas Stored Underground - Noncurrent (117)		38,204,276	38,206,206
17	OtherPropertyAndInvestmentsAbstract OTHER PROPERTY AND INVESTMENTS
18	NonutilityProperty Nonutility Property (121)		686,805	686,805
19	AccumulatedProvisionForDepreciationAndAmortizationOfNonutilityProperty (Less) Accum. Prov. for Depr. and Amort. (122)		71,615	71,615
20	InvestmentInAssociatedCompanies Investments in Associated Companies (123)
21	InvestmentInSubsidiaryCompanies Investment in Subsidiary Companies (123.1)	224	41,577,334	43,849,050
23	NoncurrentPortionOfAllowances Noncurrent Portion of Allowances and Environmental Credits	228
24	OtherInvestments Other Investments (124)		16,638,473	14,672,278
25	SinkingFunds Sinking Funds (125)
26	DepreciationFund Depreciation Fund (126)
27	AmortizationFundFederal Amortization Fund - Federal (127)
28	OtherSpecialFunds Other Special Funds (128)
29	SpecialFunds Special Funds (Non Major Only) (129)
30	DerivativeInstrumentAssetsLongTerm Long-Term Portion of Derivative Assets (175)
31	DerivativeInstrumentAssetsHedgesLongTerm Long-Term Portion of Derivative Assets - Hedges (176)
32	OtherPropertyAndInvestments TOTAL Other Property and Investments (Lines 18-21 and 23-31)		58,830,997	59,136,518
33	CurrentAndAccruedAssetsAbstract CURRENT AND ACCRUED ASSETS
34	CashAndWorkingFunds Cash and Working Funds (Non-major Only) (130)
35	Cash Cash (131)		1,178,446	2,827,329
36	SpecialDeposits Special Deposits (132-134)		10,035,437	10,786,659
37	WorkingFunds Working Fund (135)		16,200	16,200
38	TemporaryCashInvestments Temporary Cash Investments (136)
39	NotesReceivable Notes Receivable (141)
40	CustomerAccountsReceivable Customer Accounts Receivable (142)		74,208,954	70,662,006
41	OtherAccountsReceivable Other Accounts Receivable (143)		13,548,016	18,674,312
42	AccumulatedProvisionForUncollectibleAccountsCredit (Less) Accum. Prov. for Uncollectible Acct.-Credit (144)		3,137,094	2,397,030
43	NotesReceivableFromAssociatedCompanies Notes Receivable from Associated Companies (145)
44	AccountsReceivableFromAssociatedCompanies Accounts Receivable from Assoc. Companies (146)		10,965,035	13,370,564
45	FuelStock Fuel Stock (151)	227	2,185,204	2,255,915
46	FuelStockExpensesUndistributed Fuel Stock Expenses Undistributed (152)	227
47	Residuals Residuals (Elec) and Extracted Products (153)	227
48	PlantMaterialsAndOperatingSupplies Plant Materials and Operating Supplies (154)	227	93,086,380	84,079,524
49	Merchandise Merchandise (155)	227
50	OtherMaterialsAndSupplies Other Materials and Supplies (156)	227
51	NuclearMaterialsHeldForSale Nuclear Materials Held for Sale (157)	202/227
52	AllowanceInventoryAndWithheld Allowances and Environmental Credits (158.1, 158.2, 158.3, and 158.4)	228
53	NoncurrentPortionOfAllowances (Less) Noncurrent Portion of Allowances and Environmental Credits	228
54	StoresExpenseUndistributed Stores Expense Undistributed (163)	227	131,359
55	GasStoredCurrent Gas Stored Underground - Current (164.1)		725,238	6,320,240
56	LiquefiedNaturalGasStoredAndHeldForProcessing Liquefied Natural Gas Stored and Held for Processing (164.2-164.3)
57	Prepayments Prepayments (165)		16,038,295	20,684,324
58	AdvancesForGas Advances for Gas (166-167)
59	InterestAndDividendsReceivable Interest and Dividends Receivable (171)
60	RentsReceivable Rents Receivable (172)		360,452	56,198
61	AccruedUtilityRevenues Accrued Utility Revenues (173)		65,458,962	73,565,824
62	MiscellaneousCurrentAndAccruedAssets Miscellaneous Current and Accrued Assets (174)		582,534	358,632
63	DerivativeInstrumentAssets Derivative Instrument Assets (175)
64	DerivativeInstrumentAssetsLongTerm (Less) Long-Term Portion of Derivative Instrument Assets (175)
65	DerivativeInstrumentAssetsHedges Derivative Instrument Assets - Hedges (176)
66	DerivativeInstrumentAssetsHedgesLongTerm (Less) Long-Term Portion of Derivative Instrument Assets - Hedges (176)
67	CurrentAndAccruedAssets Total Current and Accrued Assets (Lines 34 through 66)		285,120,700	301,260,697
68	DeferredDebitsAbstract DEFERRED DEBITS
69	UnamortizedDebtExpense Unamortized Debt Expenses (181)		11,402,034	11,834,207
70	ExtraordinaryPropertyLosses Extraordinary Property Losses (182.1)	230a
71	UnrecoveredPlantAndRegulatoryStudyCosts Unrecovered Plant and Regulatory Study Costs (182.2)	230b
72	OtherRegulatoryAssets Other Regulatory Assets (182.3)	232	753,762,319	738,810,317
73	PreliminarySurveyAndInvestigationCharges Prelim. Survey and Investigation Charges (Electric) (183)
74	PreliminaryNaturalGasSurveyAndInvestigationChargesAndOtherPreliminarySurveyAndInvestigationCharges Preliminary Natural Gas Survey and Investigation Charges 183.1)
75	OtherPreliminarySurveyAndInvestigationCharges Other Preliminary Survey and Investigation Charges (183.2)
76	ClearingAccounts Clearing Accounts (184)		1,368,344	193,253
77	TemporaryFacilities Temporary Facilities (185)
78	MiscellaneousDeferredDebits Miscellaneous Deferred Debits (186)	233	14,539,627	606,384
79	DeferredLossesFromDispositionOfUtilityPlant Def. Losses from Disposition of Utility Plt. (187)
80	ResearchDevelopmentAndDemonstrationExpenditures Research, Devel. and Demonstration Expend. (188)	352
81	UnamortizedLossOnReacquiredDebt Unamortized Loss on Reaquired Debt (189)		15,685,227	15,873,179
82	AccumulatedDeferredIncomeTaxes Accumulated Deferred Income Taxes (190)	234	179,205,528	186,067,513
83	UnrecoveredPurchasedGasCosts Unrecovered Purchased Gas Costs (191)		807,251	1,204,021
84	DeferredDebits Total Deferred Debits (lines 69 through 83)		975,155,828	951,794,326
85	AssetsAndOtherDebits TOTAL ASSETS (lines 14-16, 32, 67, and 84)		6,718,991,941	6,666,880,409

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

COMPARATIVE BALANCE SHEET (LIABILITIES AND OTHER CREDITS)
Line No.	Title of Account (a)	Ref. Page No. (b)	Current Year End of Quarter/Year Balance (c)	Prior Year End Balance 12/31 (d)
1	ProprietaryCapitalAbstract PROPRIETARY CAPITAL
2	CommonStockIssued Common Stock Issued (201)	250	1	1
3	PreferredStockIssued Preferred Stock Issued (204)	250	0	0
4	CapitalStockSubscribed Capital Stock Subscribed (202, 205)
5	StockLiabilityForConversion Stock Liability for Conversion (203, 206)
6	PremiumOnCapitalStock Premium on Capital Stock (207)
7	OtherPaidInCapital Other Paid-In Capital (208-211)	253	2,052,533,896	2,050,821,868
8	InstallmentsReceivedOnCapitalStock Installments Received on Capital Stock (212)	252
9	DiscountOnCapitalStock (Less) Discount on Capital Stock (213)	254
10	CapitalStockExpense (Less) Capital Stock Expense (214)	254b
11	RetainedEarnings Retained Earnings (215, 215.1, 216)	118	384,821,237	367,995,733
12	UnappropriatedUndistributedSubsidiaryEarnings Unappropriated Undistributed Subsidiary Earnings (216.1)	118	7,263,759	4,968,446
13	ReacquiredCapitalStock (Less) Reacquired Capital Stock (217)	250
14	NoncorporateProprietorship Noncorporate Proprietorship (Non-major only) (218)
15	AccumulatedOtherComprehensiveIncome Accumulated Other Comprehensive Income (219)	122(a)(b)	4,800,702	4,912,586
16	ProprietaryCapital Total Proprietary Capital (lines 2 through 15)		2,425,290,673	2,408,936,570
17	LongTermDebtAbstract LONG-TERM DEBT
18	Bonds Bonds (221)	256	2,338,660,000	2,338,660,000
19	ReacquiredBonds (Less) Reacquired Bonds (222)	256
20	AdvancesFromAssociatedCompanies Advances from Associated Companies (223)	256
21	OtherLongTermDebt Other Long-Term Debt (224)	256	340,000,000	362,000,000
22	UnamortizedPremiumOnLongTermDebt Unamortized Premium on Long-Term Debt (225)		1,881,057	1,998,623
23	UnamortizedDiscountOnLongTermDebtDebit (Less) Unamortized Discount on Long-Term Debt-Debit (226)
24	LongTermDebt Total Long-Term Debt (lines 18 through 23)		2,680,541,057	2,702,658,623
25	OtherNoncurrentLiabilitiesAbstract OTHER NONCURRENT LIABILITIES
26	ObligationsUnderCapitalLeaseNoncurrent Obligations Under Capital Leases - Noncurrent (227)		10,879,311	868,750
27	AccumulatedProvisionForPropertyInsurance Accumulated Provision for Property Insurance (228.1)
28	AccumulatedProvisionForInjuriesAndDamages Accumulated Provision for Injuries and Damages (228.2)		4,258,226	4,158,310
29	AccumulatedProvisionForPensionsAndBenefits Accumulated Provision for Pensions and Benefits (228.3)		7,661,467	9,044,273
30	AccumulatedMiscellaneousOperatingProvisions Accumulated Miscellaneous Operating Provisions (228.4)		19,436,783	22,098,420
31	AccumulatedProvisionForRateRefunds Accumulated Provision for Rate Refunds (229)
32	LongTermPortionOfDerivativeInstrumentLiabilities Long-Term Portion of Derivative Instrument Liabilities
33	LongTermPortionOfDerivativeInstrumentLiabilitiesHedges Long-Term Portion of Derivative Instrument Liabilities - Hedges
34	AssetRetirementObligations Asset Retirement Obligations (230)		46,755,564	32,554,134
35	OtherNoncurrentLiabilities Total Other Noncurrent Liabilities (lines 26 through 34)		88,991,351	68,723,887
36	CurrentAndAccruedLiabilitiesAbstract CURRENT AND ACCRUED LIABILITIES
37	NotesPayable Notes Payable (231)
38	AccountsPayable Accounts Payable (232)		84,816,687	100,446,379
39	NotesPayableToAssociatedCompanies Notes Payable to Associated Companies (233)
40	AccountsPayableToAssociatedCompanies Accounts Payable to Associated Companies (234)		5,347,289	2,383,986
41	CustomerDeposits Customer Deposits (235)		17,060,926	17,508,366
42	TaxesAccrued Taxes Accrued (236)	262	133,454,719	85,145,815
43	InterestAccrued Interest Accrued (237)		23,028,596	29,793,801
44	DividendsDeclared Dividends Declared (238)
45	MaturedLongTermDebt Matured Long-Term Debt (239)
46	MaturedInterest Matured Interest (240)
47	TaxCollectionsPayable Tax Collections Payable (241)		308,885	312,293
48	MiscellaneousCurrentAndAccruedLiabilities Miscellaneous Current and Accrued Liabilities (242)		43,363,542	62,363,707
49	ObligationsUnderCapitalLeasesCurrent Obligations Under Capital Leases-Current (243)		2,299,807	2,319,559
50	DerivativesInstrumentLiabilities Derivative Instrument Liabilities (244)
51	LongTermPortionOfDerivativeInstrumentLiabilities (Less) Long-Term Portion of Derivative Instrument Liabilities
52	DerivativeInstrumentLiabilitiesHedges Derivative Instrument Liabilities - Hedges (245)
53	LongTermPortionOfDerivativeInstrumentLiabilitiesHedges (Less) Long-Term Portion of Derivative Instrument Liabilities-Hedges
54	CurrentAndAccruedLiabilities Total Current and Accrued Liabilities (lines 37 through 53)		309,680,451	300,273,906
55	DeferredCreditsAbstract DEFERRED CREDITS
56	CustomerAdvancesForConstruction Customer Advances for Construction (252)		142,867,832	138,076,346
57	AccumulatedDeferredInvestmentTaxCredits Accumulated Deferred Investment Tax Credits (255)	266	3,374,953	3,374,953
58	DeferredGainsFromDispositionOfUtilityPlant Deferred Gains from Disposition of Utility Plant (256)
59	OtherDeferredCredits Other Deferred Credits (253)	269	62,727,280	45,627,055
60	OtherRegulatoryLiabilities Other Regulatory Liabilities (254)	278	114,353,481	117,697,851
61	UnamortizedGainOnReacquiredDebt Unamortized Gain on Reacquired Debt (257)
62	AccumulatedDeferredIncomeTaxesAcceleratedAmortizationProperty Accum. Deferred Income Taxes-Accel. Amort.(281)	272
63	AccumulatedDeferredIncomeTaxesOtherProperty Accum. Deferred Income Taxes-Other Property (282)		634,840,395	627,642,931
64	AccumulatedDeferredIncomeTaxesOther Accum. Deferred Income Taxes-Other (283)		256,324,469	253,868,287
65	DeferredCredits Total Deferred Credits (lines 56 through 64)		1,214,488,410	1,186,287,423
66	LiabilitiesAndOtherCredits TOTAL LIABILITIES AND STOCKHOLDER EQUITY (lines 16, 24, 35, 54 and 65)		6,718,991,942	6,666,880,409

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

STATEMENT OF INCOME
Quarterly Report in column (c) the current year to date balance. Column (c) equals the total of adding the data in column (g) plus the data in column (i) plus the data in column (k). Report in column (d) similar data for the previous year. This information is reported in the annual filing only. Enter in column (e) the balance for the reporting quarter and in column (f) the balance for the same three month period for the prior year. Report in column (g) the quarter to date amounts for electric utility function; in column (i) the quarter to date amounts for gas utility, and in column (k) the quarter to date amounts for other utility function for the current year quarter. Report in column (h) the quarter to date amounts for electric utility function; in column (j) the quarter to date amounts for gas utility, and in column (l) the quarter to date amounts for other utility function for the prior year quarter. If additional columns are needed, place them in a footnote. Annual or Quarterly if applicable Do not report fourth quarter data in columns (e) and (f) Report amounts for accounts 412 and 413, Revenues and Expenses from Utility Plant Leased to Others, in another utility column in a similar manner to a utility department. Spread the amount(s) over Lines 2 thru 26 as appropriate. Include these amounts in columns (c) and (d) totals. Report amounts in account 414, Other Utility Operating Income, in the same manner as accounts 412 and 413 above. Use page 122 for important notes regarding the statement of income for any account thereof. Give concise explanations concerning unsettled rate proceedings where a contingency exists such that refunds of a material amount may need to be made to the utility's customers or which may result in material refund to the utility with respect to power or gas purchases. State for each year affected the gross revenues or costs to which the contingency relates and the tax effects together with an explanation of the major factors which affect the rights of the utility to retain such revenues or recover amounts paid with respect to power or gas purchases. Give concise explanations concerning significant amounts of any refunds made or received during the year resulting from settlement of any rate proceeding affecting revenues received or costs incurred for power or gas purchases, and a summary of the adjustments made to balance sheet, income, and expense accounts. If any notes appearing in the report to stockholders are applicable to the Statement of Income, such notes may be included at page 122. Enter on page 122 a concise explanation of only those changes in accounting methods made during the year which had an effect on net income, including the basis of allocations and apportionments from those used in the preceding year. Also, give the appropriate dollar effect of such changes. Explain in a footnote if the previous year's/quarter's figures are different from that reported in prior reports. If the columns are insufficient for reporting additional utility departments, supply the appropriate account titles report the information in a footnote to this schedule.
Line No.	Title of Account (a)	(Ref.) Page No. (b)	Total Current Year to Date Balance for Quarter/Year (c)	Total Prior Year to Date Balance for Quarter/Year (d)	Current 3 Months Ended - Quarterly Only - No 4th Quarter (e)	Prior 3 Months Ended - Quarterly Only - No 4th Quarter (f)	Electric Utility Current Year to Date (in dollars) (g)	Electric Utility Previous Year to Date (in dollars) (h)	Gas Utiity Current Year to Date (in dollars) (i)	Gas Utility Previous Year to Date (in dollars) (j)	Other Utility Current Year to Date (in dollars) (k)	Other Utility Previous Year to Date (in dollars) (l)
1	UtilityOperatingIncomeAbstract UTILITY OPERATING INCOME
2	OperatingRevenues Operating Revenues (400)	300	360,573,278	355,128,107	360,573,278	355,128,107	285,091,425	265,060,011	75,125,355	89,621,341	356,498	446,755
3	OperatingExpensesAbstract Operating Expenses
4	OperationExpense Operation Expenses (401)	320	138,283,799	135,324,559	138,283,799	135,324,559	111,212,695	104,045,217	26,798,850	30,928,688	272,254	350,654
5	MaintenanceExpense Maintenance Expenses (402)	320	20,358,394	15,031,863	20,358,394	15,031,863	17,165,474	12,024,103	3,192,495	3,007,210	425	550
6	DepreciationExpense Depreciation Expense (403)	336	45,532,650	41,997,150	45,532,650	41,997,150	38,594,802	35,750,365	6,924,305	6,233,242	13,543	13,543
7	DepreciationExpenseForAssetRetirementCosts Depreciation Expense for Asset Retirement Costs (403.1)	336
8	AmortizationAndDepletionOfUtilityPlant Amort. & Depl. of Utility Plant (404-405)	336	4,274,510	4,184,264	4,274,510	4,184,264	2,593,335	2,482,242	1,681,175	1,702,022
9	AmortizationOfElectricPlantAcquisitionAdjustments Amort. of Utility Plant Acq. Adj. (406)	336	3,686,971	3,686,971	3,686,971	3,686,971	3,686,971	3,686,971	0
10	AmortizationOfPropertyLossesUnrecoveredPlantAndRegulatoryStudyCosts Amort. Property Losses, Unrecov Plant and Regulatory Study Costs (407)
11	AmortizationOfConversionExpenses Amort. of Conversion Expenses (407.2)
12	RegulatoryDebits Regulatory Debits (407.3)		11,123,219	14,926,572	11,123,219	14,926,572	5,241,233	8,434,539	5,881,986	6,492,033
13	RegulatoryCredits (Less) Regulatory Credits (407.4)		10,158,548	10,587,019	10,158,548	10,587,019	6,444,125	7,031,343	3,714,423	3,555,676
14	TaxesOtherThanIncomeTaxesUtilityOperatingIncome Taxes Other Than Income Taxes (408.1)	262	48,102,099	42,837,920	48,102,099	42,837,920	37,696,057	33,121,619	10,393,854	9,704,173	12,188	12,128
15	IncomeTaxesOperatingIncome Income Taxes - Federal (409.1)	262	1,867,501	364,031	1,867,501	364,031	259,074	3,273,276	2,114,601	3,621,643	11,974	15,664
16	IncomeTaxesUtilityOperatingIncomeOther Income Taxes - Other (409.1)	262	1,185,327	169,767	1,185,327	169,767	674,207	893,861	506,993	1,058,229	4,127	5,399
17	ProvisionsForDeferredIncomeTaxesUtilityOperatingIncome Provision for Deferred Income Taxes (410.1)	234, 272	38,946,434	34,366,740	38,946,434	34,366,740	31,029,574	27,465,339	7,916,708	6,903,896	152	2,495
18	ProvisionForDeferredIncomeTaxesCreditOperatingIncome (Less) Provision for Deferred Income Taxes-Cr. (411.1)	234, 272	29,681,458	21,879,554	29,681,458	21,879,554	22,629,155	15,951,690	7,052,303	5,927,864
19	InvestmentTaxCreditAdjustments Investment Tax Credit Adj. - Net (411.4)	266	0	45,424	0	45,424	0	45,424
20	GainsFromDispositionOfPlant (Less) Gains from Disp. of Utility Plant (411.6)
21	LossesFromDispositionOfServiceCompanyPlant Losses from Disp. of Utility Plant (411.7)
22	GainsFromDispositionOfAllowances (Less) Gains from Disposition of Allowances (411.8)		1,001		1,001		1,001
23	LossesFromDispositionOfAllowances Losses from Disposition of Allowances (411.9)
24	AccretionExpense Accretion Expense (411.10)
24.1	GainsFromDispositionOfEnvironmentalCredits (Less) Gains from Disposition of Environmental Credits (411.11)
24.2	LossesFromDispositionOfEnvironmentalCredits Losses from Disposition of Environmental Credits (411.12)
25	UtilityOperatingExpenses TOTAL Utility Operating Expenses (Enter Total of lines 4 thru 24.2)		273,521,899	260,377,840	273,521,899	260,377,840	218,562,995	199,814,801	54,644,241	60,167,596	314,663	395,443
27	NetUtilityOperatingIncome Net Util Oper Inc (Enter Tot line 2 less 25)		87,051,379	94,750,267	87,051,379	94,750,267	66,528,430	65,245,210	20,481,114	29,453,745	41,835	51,312
28	OtherIncomeAndDeductionsAbstract Other Income and Deductions
29	OtherIncomeAbstract Other Income
30	NonutilityOperatingIncomeAbstract Nonutilty Operating Income
31	RevenuesFromMerchandisingJobbingAndContractWork Revenues From Merchandising, Jobbing and Contract Work (415)		142,792	137,529	142,792	137,529
32	CostsAndExpensesOfMerchandisingJobbingAndContractWork (Less) Costs and Exp. of Merchandising, Job. & Contract Work (416)		119,525	76,060	119,525	76,060
33	RevenuesFromNonutilityOperations Revenues From Nonutility Operations (417)		811,742	129,426	811,742	129,426
34	ExpensesOfNonutilityOperations (Less) Expenses of Nonutility Operations (417.1)		3,763	5,210	3,763	5,210
35	NonoperatingRentalIncome Nonoperating Rental Income (418)
36	EquityInEarningsOfSubsidiaryCompanies Equity in Earnings of Subsidiary Companies (418.1)	119	2,295,313	201,686	2,295,313	201,686
37	InterestAndDividendIncome Interest and Dividend Income (419)		128,051	66,810	128,051	66,810
38	AllowanceForOtherFundsUsedDuringConstruction Allowance for Other Funds Used During Construction (419.1)		1,664,253	1,583,289	1,664,253	1,583,289
39	MiscellaneousNonoperatingIncome Miscellaneous Nonoperating Income (421)		183,460	801,330	183,460	801,330
40	GainOnDispositionOfProperty Gain on Disposition of Property (421.1)
41	OtherIncome TOTAL Other Income (Enter Total of lines 31 thru 40)		511,697	2,176,576	511,697	2,176,576
42	OtherIncomeDeductionsAbstract Other Income Deductions
43	LossOnDispositionOfProperty Loss on Disposition of Property (421.2)
44	MiscellaneousAmortization Miscellaneous Amortization (425)
45	Donations Donations (426.1)		159,059	160,691	159,059	160,691
46	LifeInsurance Life Insurance (426.2)
47	Penalties Penalties (426.3)		0	2,101	0	2,101
48	ExpendituresForCertainCivicPoliticalAndRelatedActivities Exp. for Certain Civic, Political & Related Activities (426.4)		192,386	144,898	192,386	144,898
49	OtherDeductions Other Deductions (426.5)		876,976	859,361	876,976	859,361
50	OtherIncomeDeductions TOTAL Other Income Deductions (Total of lines 43 thru 49)		1,228,421	1,162,849	1,228,421	1,162,849
51	TaxesApplicableToOtherIncomeAndDeductionsAbstract Taxes Applic. to Other Income and Deductions
52	TaxesOtherThanIncomeTaxesOtherIncomeAndDeductions Taxes Other Than Income Taxes (408.2)	262	1,341	714	1,341	714
53	IncomeTaxesFederal Income Taxes-Federal (409.2)	262	389,100	473,850	389,100	473,850
54	IncomeTaxesOther Income Taxes-Other (409.2)	262	134,254	163,853	134,254	163,853
55	ProvisionForDeferredIncomeTaxesOtherIncomeAndDeductions Provision for Deferred Inc. Taxes (410.2)	234, 272	33,700	907	33,700	907
56	ProvisionForDeferredIncomeTaxesCreditOtherIncomeAndDeductions (Less) Provision for Deferred Income Taxes-Cr. (411.2)	234, 272	6,018	535	6,018	535
57	InvestmentTaxCreditAdjustmentsNonutilityOperations Investment Tax Credit Adj.-Net (411.5)
58	InvestmentTaxCredits (Less) Investment Tax Credits (420)
59	TaxesOnOtherIncomeAndDeductions TOTAL Taxes on Other Income and Deductions (Total of lines 52-58)		552,377	638,789	552,377	638,789
60	NetOtherIncomeAndDeductions Net Other Income and Deductions (Total of lines 41, 50, 59)		1,269,101	374,939	1,269,101	374,939
61	InterestChargesAbstract Interest Charges
62	InterestOnLongTermDebt Interest on Long-Term Debt (427)		30,941,368	27,609,892	30,941,368	27,609,892
63	AmortizationOfDebtDiscountAndExpense Amort. of Debt Disc. and Expense (428)		413,002	343,102	413,002	343,102
64	AmortizationOfLossOnReacquiredDebt Amortization of Loss on Reaquired Debt (428.1)		184,002	390,081	184,002	390,081
65	AmortizationOfPremiumOnDebtCredit (Less) Amort. of Premium on Debt-Credit (429)
66	AmortizationOfGainOnReacquiredDebtCredit (Less) Amortization of Gain on Reaquired Debt-Credit (429.1)
67	InterestOnDebtToAssociatedCompanies Interest on Debt to Assoc. Companies (430)
68	OtherInterestExpense Other Interest Expense (431)		621,252	1,078,104	621,252	1,078,104
69	AllowanceForBorrowedFundsUsedDuringConstructionCredit (Less) Allowance for Borrowed Funds Used During Construction-Cr. (432)		907,537	782,686	907,537	782,686
70	NetInterestCharges Net Interest Charges (Total of lines 62 thru 69)		31,252,087	28,638,494	31,252,087	28,638,494
71	IncomeBeforeExtraordinaryItems Income Before Extraordinary Items (Total of lines 27, 60 and 70)		54,530,191	66,486,712	54,530,191	66,486,712
72	ExtraordinaryItemsAbstract Extraordinary Items
73	ExtraordinaryIncome Extraordinary Income (434)
74	ExtraordinaryDeductions (Less) Extraordinary Deductions (435)
75	NetExtraordinaryItems Net Extraordinary Items (Total of line 73 less line 74)
76	IncomeTaxesExtraordinaryItems Income Taxes-Federal and Other (409.3)	262
77	ExtraordinaryItemsAfterTaxes Extraordinary Items After Taxes (line 75 less line 76)
78	NetIncomeLoss Net Income (Total of line 71 and 77)		54,530,191	66,486,712	54,530,191	66,486,712

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

STATEMENT OF RETAINED EARNINGS
Do not report Lines 49-53 on the quarterly report. Report all changes in appropriated retained earnings, unappropriated retained earnings, and unappropriated undistributed subsidiary earnings for the year. Each credit and debit during the year should be identified as to the retained earnings account in which recorded (Accounts 433, 436-439 inclusive). Show the contra primary account affected in column (b). State the purpose and amount for each reservation or appropriation of retained earnings. List first Account 439, Adjustments to Retained Earnings, reflecting adjustments to the opening balance of retained earnings. Follow by credit, then debit items, in that order. Show dividends for each class and series of capital stock. Show separately the State and Federal income tax effect of items shown for Account 439, Adjustments to Retained Earnings. Explain in a footnote the basis for determining the amount reserved or appropriated. If such reservation or appropriation is to be recurrent, state the number and annual amounts to be reserved or appropriated as well as the totals eventually to be accumulated. If any notes appearing in the report to stockholders are applicable to this statement, attach them at page 122.
Line No.	Item (a)	Contra Primary Account Affected (b)	Current Quarter/Year Year to Date Balance (c)	Previous Quarter/Year Year to Date Balance (d)
	UnappropriatedRetainedEarningsAbstract UNAPPROPRIATED RETAINED EARNINGS (Account 216)
1	UnappropriatedRetainedEarnings Balance-Beginning of Period		367,995,733	351,876,746
2	ChangesAbstract Changes
3	AdjustmentsToRetainedEarningsAbstract Adjustments to Retained Earnings (Account 439)
4	AdjustmentsToRetainedEarningsCreditAbstract Adjustments to Retained Earnings Credit
4.1	AdjustmentsToRetainedEarningsCredit
9	AdjustmentsToRetainedEarningsCredit TOTAL Credits to Retained Earnings (Acct. 439)
10	AdjustmentsToRetainedEarningsDebitAbstract Adjustments to Retained Earnings Debit
10.1	AdjustmentsToRetainedEarningsDebit Holding Company Reorganization		0	0
15	AdjustmentsToRetainedEarningsDebit TOTAL Debits to Retained Earnings (Acct. 439)		0	0
16	BalanceTransferredFromIncome Balance Transferred from Income (Account 433 less Account 418.1)		56,825,504	157,118,987
17	AppropriationsOfRetainedEarningsAbstract Appropriations of Retained Earnings (Acct. 436)
22	AppropriationsOfRetainedEarnings TOTAL Appropriations of Retained Earnings (Acct. 436)
23	DividendsDeclaredPreferredStockAbstract Dividends Declared-Preferred Stock (Account 437)
29	DividendsDeclaredPreferredStock TOTAL Dividends Declared-Preferred Stock (Acct. 437)
30	DividendsDeclaredCommonStockAbstract Dividends Declared-Common Stock (Account 438)
30.1	DividendsDeclaredCommonStock Common Stock Dividend		40,000,000	141,000,000
36	DividendsDeclaredCommonStock TOTAL Dividends Declared-Common Stock (Acct. 438)		40,000,000	141,000,000
37	TransfersFromUnappropriatedUndistributedSubsidiaryEarnings Transfers from Acct 216.1, Unapprop. Undistrib. Subsidiary Earnings
38	UnappropriatedRetainedEarnings Balance - End of Period (Total 1,9,15,16,22,29,36,37)		384,821,237	367,995,733
39	AppropriatedRetainedEarningsAbstract APPROPRIATED RETAINED EARNINGS (Account 215)
45	AppropriatedRetainedEarnings TOTAL Appropriated Retained Earnings (Account 215)
	AppropriatedRetainedEarningsAmortizationReserveFederalAbstract APPROP. RETAINED EARNINGS - AMORT. Reserve, Federal (Account 215.1)
46	AppropriatedRetainedEarningsAmortizationReserveFederal TOTAL Approp. Retained Earnings-Amort. Reserve, Federal (Acct. 215.1)
47	AppropriatedRetainedEarningsIncludingReserveAmortization TOTAL Approp. Retained Earnings (Acct. 215, 215.1) (Total 45,46)
48	RetainedEarnings TOTAL Retained Earnings (Acct. 215, 215.1, 216) (Total 38, 47) (216.1)		384,821,237	367,995,733
	UnappropriatedUndistributedSubsidiaryEarningsAbstract UNAPPROPRIATED UNDISTRIBUTED SUBSIDIARY EARNINGS (Account Report only on an Annual Basis, no Quarterly)
49	UnappropriatedUndistributedSubsidiaryEarnings Balance-Beginning of Year (Debit or Credit)
50	EquityInEarningsOfSubsidiaryCompanies Equity in Earnings for Year (Credit) (Account 418.1)
51	DividendsReceived (Less) Dividends Received (Debit)
52	ChangesUnappropriatedUndistributedSubsidiaryEarningsCredits TOTAL other Changes in unappropriated undistributed subsidiary earnings for the year
53	UnappropriatedUndistributedSubsidiaryEarnings Balance-End of Year (Total lines 49 thru 52)

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

STATEMENT OF CASH FLOWS
Codes to be used:(a) Net Proceeds or Payments;(b)Bonds, debentures and other long-term debt; (c) Include commercial paper; and (d) Identify separately such items as investments, fixed assets, intangibles, etc. Information about noncash investing and financing activities must be provided in the Notes to the Financial statements. Also provide a reconciliation between "Cash and Cash Equivalents at End of Period" with related amounts on the Balance Sheet. Operating Activities - Other: Include gains and losses pertaining to operating activities only. Gains and losses pertaining to investing and financing activities should be reported in those activities. Show in the Notes to the Financials the amounts of interest paid (net of amount capitalized) and income taxes paid. Investing Activities: Include at Other (line 31) net cash outflow to acquire other companies. Provide a reconciliation of assets acquired with liabilities assumed in the Notes to the Financial Statements. Do not include on this statement the dollar amount of leases capitalized per the USofA General Instruction 20; instead provide a reconciliation of the dollar amount of leases capitalized with the plant cost.
Line No.	Description (See Instructions No.1 for explanation of codes) (a)	Current Year to Date Quarter/Year (b)	Previous Year to Date Quarter/Year (c)
1	NetCashFlowFromOperatingActivitiesAbstract Net Cash Flow from Operating Activities
2	NetIncomeLoss Net Income (Line 78(c) on page 117)	54,530,191	66,486,712
3	NoncashChargesCreditsToIncomeAbstract Noncash Charges (Credits) to Income:
4	DepreciationAndDepletion Depreciation and Depletion	45,532,650	41,997,150
5	NoncashAdjustmentsToCashFlowsFromOperatingActivities Amortization of (Specify) (footnote details)	10,333,268	10,589,004
5.1	NoncashAdjustmentsToCashFlowsFromOperatingActivitiesDescription Amortization of	7,961,481	7,871,235
5.2	NoncashAdjustmentsToCashFlowsFromOperatingActivitiesDescription Other Non-cash charges to net income-net	(a) 2,371,787	2,717,769
8	DeferredIncomeTaxesNet Deferred Income Taxes (Net)	9,292,658	12,487,558
9	InvestmentTaxCreditAdjustmentsNet Investment Tax Credit Adjustment (Net)		45,424
10	NetIncreaseDecreaseInReceivablesOperatingActivities Net (Increase) Decrease in Receivables	4,724,941	5,882,034
11	NetIncreaseDecreaseInInventoryOperatingActivities Net (Increase) Decrease in Inventory	3,209,784	2,625,655
12	NetIncreaseDecreaseInAllowancesInventoryOperatingActivities Net (Increase) Decrease in Allowances and Environmental Credits Inventory		1,653,720
13	NetIncreaseDecreaseInPayablesAndAccruedExpensesOperatingActivities Net Increase (Decrease) in Payables and Accrued Expenses	21,943,250	24,845,074
14	NetIncreaseDecreaseInOtherRegulatoryAssetsOperatingActivities Net (Increase) Decrease in Other Regulatory Assets	7,668,204	19,588,967
15	NetIncreaseDecreaseInOtherRegulatoryLiabilitiesOperatingActivities Net Increase (Decrease) in Other Regulatory Liabilities	3,344,370	3,837,015
16	AllowanceForOtherFundsUsedDuringConstructionOperatingActivities (Less) Allowance for Other Funds Used During Construction	1,664,253	1,583,289
17	UndistributedEarningsFromSubsidiaryCompaniesOperatingActivities (Less) Undistributed Earnings from Subsidiary Companies	2,295,313	201,686
18	OtherAdjustmentsToCashFlowsFromOperatingActivities Other (provide details in footnote):	20,690,668	8,877,005
18.1	OtherAdjustmentsToCashFlowsFromOperatingActivitiesDescription Other	(b) 20,690,668	8,877,005
22	NetCashFlowFromOperatingActivities Net Cash Provided by (Used in) Operating Activities (Total of Lines 2 thru 21)	153,456,328	135,519,395
24	CashFlowsFromInvestmentActivitiesAbstract Cash Flows from Investment Activities:
25	ConstructionAndAcquisitionOfPlantIncludingLandAbstract Construction and Acquisition of Plant (including land):
26	GrossAdditionsToUtilityPlantLessNuclearFuelInvestingActivities Gross Additions to Utility Plant (less nuclear fuel)	96,101,522	72,954,507
27	GrossAdditionsToNuclearFuelInvestingActivities Gross Additions to Nuclear Fuel
28	GrossAdditionsToCommonUtilityPlantInvestingActivities Gross Additions to Common Utility Plant	580,836	2,664,649
29	GrossAdditionsToNonutilityPlantInvestingActivities Gross Additions to Nonutility Plant
30	AllowanceForOtherFundsUsedDuringConstructionInvestingActivities (Less) Allowance for Other Funds Used During Construction	1,664,253	1,583,289
31	OtherConstructionAndAcquisitionOfPlantInvestmentActivities Other (provide details in footnote):
34	CashOutflowsForPlant Cash Outflows for Plant (Total of lines 26 thru 33)	93,856,433	74,035,867
36	AcquisitionOfOtherNoncurrentAssets Acquisition of Other Noncurrent Assets (d)
37	ProceedsFromDisposalOfNoncurrentAssets Proceeds from Disposal of Noncurrent Assets (d)
39	InvestmentsInAndAdvancesToAssociatedAndSubsidiaryCompanies Investments in and Advances to Assoc. and Subsidiary Companies
40	ContributionsAndAdvancesFromAssociatedAndSubsidiaryCompanies Contributions and Advances from Assoc. and Subsidiary Companies
41	DispositionOfInvestmentsInAndAdvancesToAssociatedAndSubsidiaryCompaniesAbstract Disposition of Investments in (and Advances to)
42	DispositionOfInvestmentsInAndAdvancesToAssociatedAndSubsidiaryCompanies Disposition of Investments in (and Advances to) Associated and Subsidiary Companies
44	PurchaseOfInvestmentSecurities Purchase of Investment Securities (a)
45	ProceedsFromSalesOfInvestmentSecurities Proceeds from Sales of Investment Securities (a)
46	LoansMadeOrPurchased Loans Made or Purchased
47	CollectionsOnLoans Collections on Loans
49	NetIncreaseDecreaseInReceivablesInvestingActivities Net (Increase) Decrease in Receivables
50	NetIncreaseDecreaseInInventoryInvestingActivities Net (Increase) Decrease in Inventory
51	NetIncreaseDecreaseInAllowancesHeldForSpeculationInvestingActivities Net (Increase) Decrease in Allowances and Environmental Credits Held for Speculation
52	NetIncreaseDecreaseInPayablesAndAccruedExpensesInvestingActivities Net Increase (Decrease) in Payables and Accrued Expenses
53	OtherAdjustmentsToCashFlowsFromInvestmentActivities Other (provide details in footnote):
57	CashFlowsProvidedFromUsedInInvestmentActivities Net Cash Provided by (Used in) Investing Activities (Total of lines 34 thru 55)	93,856,433	74,035,867
59	CashFlowsFromFinancingActivitiesAbstract Cash Flows from Financing Activities:
60	ProceedsFromIssuanceAbstract Proceeds from Issuance of:
61	ProceedsFromIssuanceOfLongTermDebtFinancingActivities Long-Term Debt (b)		400,000,000
62	ProceedsFromIssuanceOfPreferredStockFinancingActivities Preferred Stock
63	ProceedsFromIssuanceOfCommonStockFinancingActivities Common Stock
64	OtherAdjustmentsToCashFlowsFromFinancingActivities Other (provide details in footnote):
64.1	OtherAdjustmentsToCashFlowsFromFinancingActivitiesDescription Treasury Stock Activity
66	NetIncreaseInShortTermDebt Net Increase in Short-Term Debt (c)
67	OtherAdjustmentsByOutsideSourcesToCashFlowsFromFinancingActivities Other (provide details in footnote):
67.1	DescriptionForOtherAdjustmentsByOutsideSourcesToCashFlowsFromFinancingActivities Cash contribution from NorthWestern Energy Group, Inc.
70	CashProvidedByOutsideSources Cash Provided by Outside Sources (Total 61 thru 69)	0	400,000,000
72	PaymentsForRetirementAbstract Payments for Retirement of:
73	PaymentsForRetirementOfLongTermDebtFinancingActivities Long-term Debt (b)
74	PaymentsForRetirementOfPreferredStockFinancingActivities Preferred Stock
75	PaymentsForRetirementOfCommonStockFinancingActivities Common Stock
76	OtherRetirementsOfBalancesImpactingCashFlowsFromFinancingActivities Other (provide details in footnote):	22,000,000	344,965,000
76.1	DescriptionOfOtherRetirementsImpactingCashFlowsFromFinancingActivities Debt Financing Costs		2,965,000
76.2	DescriptionOfOtherRetirementsImpactingCashFlowsFromFinancingActivities Line of Credit (Repayments) Borrowings, Net	22,000,000	342,000,000
76.3	DescriptionOfOtherRetirementsImpactingCashFlowsFromFinancingActivities Distribution of Cash to NorthWestern Energy Public Service Corporation
78	NetDecreaseInShortTermDebt Net Decrease in Short-Term Debt (c)
80	DividendsOnPreferredStock Dividends on Preferred Stock
81	DividendsOnCommonStock Dividends on Common Stock	40,000,000	68,000,000
83	CashFlowsProvidedFromUsedInFinancingActivities Net Cash Provided by (Used in) Financing Activities (Total of lines 70 thru 81)	62,000,000	12,965,000
85	NetIncreaseDecreaseInCashAndCashEquivalentsAbstract Net Increase (Decrease) in Cash and Cash Equivalents
86	NetIncreaseDecreaseInCashAndCashEquivalents Net Increase (Decrease) in Cash and Cash Equivalents (Total of line 22, 57 and 83)	2,400,105	48,518,528
88	CashAndCashEquivalents Cash and Cash Equivalents at Beginning of Period	13,630,188	14,800,070
90	CashAndCashEquivalents Cash and Cash Equivalents at End of Period	(c) 11,230,083	63,318,598

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

FOOTNOTE DATA

(a) Concept: NoncashAdjustmentsToCashFlowsFromOperatingActivities

	3/31/2026	3/31/2025
Other Noncash Charges to Income, Net:
Amortization of debt issue costs, discount, premium and deferred hedge gain	655,995	674,765
Gain on disposition of assets	-	146,679
Other noncash losses (gains)	28,509	(8,715)
Stock based compensation costs	1,687,283	1,905,040
	2,371,787	2,717,769

(b) Concept: OtherAdjustmentsToCashFlowsFromOperatingActivities

	3/31/2026	3/31/2025
Other Assets and Liabilities, Net:
Net change - other current assets	4,117,873	3,287,766
Net change - accrued utility revenues	8,106,862	8,022,672
Net change - deferred debits	(16,107,966)	955,922
Net change - deferred credits	(800,918)	(540,000)
Net change - noncurrent liabilities	25,374,817	(2,849,355)
	20,690,668	8,877,005

	3/31/2026	12/31/2025	3/31/2025	12/31/2024
Cash (131)	1,178,446	2,827,329	4,109,247	888,205
Working Funds (135)	16,200	16,200	16,000	17,500
Other Special Deposits (134)	10,035,437	10,786,659	13,130,353	13,894,365
Temporary Cash Investments (136)	-	-	46,062,998	-
Total	11,230,083	13,630,188	63,318,598	14,800,070

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

NOTES TO FINANCIAL STATEMENTS

Use the space below for important notes regarding the Balance Sheet, Statement of Income for the year, Statement of Retained Earnings for the year, and Statement of Cash Flows, or any account thereof. Classify the notes according to each basic statement, providing a subheading for each statement except where a note is applicable to more than one statement.
Furnish particulars (details) as to any significant contingent assets or liabilities existing at end of year, including a brief explanation of any action initiated by the Internal Revenue Service involving possible assessment of additional income taxes of material amount, or of a claim for refund of income taxes of a material amount initiated by the utility. Give also a brief explanation of any dividends in arrears on cumulative preferred stock.
For Account 116, Utility Plant Adjustments, explain the origin of such amount, debits and credits during the year, and plan of disposition contemplated, giving references to Commission orders or other authorizations respecting classification of amounts as plant adjustments and requirements as to disposition thereof.
Where Accounts 189, Unamortized Loss on Reacquired Debt, and 257, Unamortized Gain on Reacquired Debt, are not used, give an explanation, providing the rate treatment given these items. See General Instruction 17 of the Uniform System of Accounts.
Give a concise explanation of any retained earnings restrictions and state the amount of retained earnings affected by such restrictions.
If the notes to financial statements relating to the respondent company appearing in the annual report to the stockholders are applicable and furnish the data required by instructions above and on pages 114-121, such notes may be included herein.
For the 3Q disclosures, respondent must provide in the notes sufficient disclosures so as to make the interim information not misleading. Disclosures which would substantially duplicate the disclosures contained in the most recent FERC Annual Report may be omitted.
For the 3Q disclosures, the disclosures shall be provided where events subsequent to the end of the most recent year have occurred which have a material effect on the respondent. Respondent must include in the notes significant changes since the most recently completed year in such items as: accounting principles and practices; estimates inherent in the preparation of the financial statements; status of long-term contracts; capitalization including significant new borrowings or modifications of existing financing agreements; and changes resulting from business combinations or dispositions. However, where material contingencies exist, the disclosure of such matters shall be provided even though a significant change since year end may not have occurred.
Finally, if the notes to the financial statements relating to the respondent appearing in the annual report to the stockholders are applicable and furnish the data required by the above instructions, such notes may be included herein.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(1) Nature of Operations and Basis of Consolidation

NorthWestern Corporation (NW Corp), a direct wholly-owned subsidiary of NorthWestern Energy Group, Inc., doing business as NorthWestern Energy, provides electricity and / or natural gas to approximately 690,100 customers in Montana and Yellowstone National Park. We have generated and distributed electricity and distributed natural gas in Montana since 2002.

The Financial Statements for the periods included herein have been prepared by NorthWestern Corporation (NorthWestern, we or us), pursuant to the rules and regulations of the Federal Energy Regulatory Commission (FERC) as set forth in its applicable Uniform System of Accounts and published accounting releases. The preparation of financial statements in conformity with the accounting requirements of the FERC as set forth in its applicable Uniform System of Accounts and published accounting releases requires management to make estimates and assumptions that may affect the reported amounts of assets, liabilities, revenues and expenses during the reporting period. Actual results could differ from those estimates. Events occurring subsequent to March 31, 2026, have been evaluated as to their potential impact to the Financial Statements through the date of issuance.

The following notes to the financials statements appear in Northwestern Corporation’s interim financials and are prepared in conformity with Generally Accepted Accounting Principles (GAAP).

NorthWestern Energy Group, Inc. Pending Merger with Black Hills Corporation

On August 18, 2025, NorthWestern Energy Group, Inc. entered into a Merger Agreement with Black Hills and River Merger Sub Inc., a direct wholly owned subsidiary of Black Hills (Merger Sub). The Merger Agreement provides for an all-stock merger of equals between NorthWestern Energy Group, Inc. and Black Hills upon the terms and subject to the conditions set forth therein. The Merger Agreement provides for Merger Sub to merge with and into NorthWestern Energy Group, Inc. (Merger), with NorthWestern Energy Group, Inc. continuing as the surviving entity and a direct wholly owned subsidiary of Black Hills, which would assume a new corporate name as the resulting parent company of the combined corporate group. The completion of the Merger is subject to the satisfaction or waiver of certain conditions to closing. We anticipate the transaction closing in the second half of 2026, subject to the satisfaction or waiver of certain closing conditions.

(2) Regulatory Matters

Montana Rate Review

In December 2025, the MPSC issued a final order approving our partial electric settlement agreement. The final order also suspended the 90/10 cost sharing mechanism of the Power Cost and Credit Adjustment Mechanism (PCCAM) on a temporary basis pending further review by the MPSC. Within this final order, the MPSC disallowed a portion of the capital costs related to the construction of Yellowstone County Generating Station (YCGS). As a result, in the fourth quarter of 2025 we recorded a $30.9 million non-cash charge for the regulatory disallowance. As of March 31, 2026, we have $6.3 million reserved within Regulatory liabilities on the Condensed Consolidated Balance Sheets for interim rates to be refunded to customers.

In January 2026, we filed a Motion for Reconsideration (Motion) as it relates to this final order. Among other things, our Motion requests that the MPSC reconsider their prudence conclusions regarding the capital costs associated with the construction of YCGS and clarification as to the effective date of the PCCAM sharing mechanism suspension, for which we have requested an effective date of July 1, 2025, to align with the PCCAM tracker year. Any subsequent modifications by the MPSC to their final order will be reflected in our 2026 results.

Colstrip Acquisition and Requests for Cost Recovery

In January 2023 we entered into a definitive agreement with Avista Corporation (Avista) to acquire their interest in Colstrip Units 3 and 4 for $0 and completed this acquisition on January 1, 2026. Accordingly, we are responsible for the associated operating costs beginning on January 1, 2026, which we will not collect through utility base rates, until requested in a future Montana rate review. Avista will remain responsible for their pre-closing share of environmental liabilities, asset retirement obligations (AROs), and pension liabilities attributed to events or conditions existing prior to the closing of the transaction and for any future decommissioning and demolition costs associated with the existing facilities that comprise their interests.

While Avista remains contractually obligated for the pre-closing share of AROs, we remain the primary obligor. As such, as of March 31, 2026, we have recorded $1.1 million and $13.0 million within Accrued expenses and other and Other noncurrent liabilities, respectively, on the Condensed Consolidated Balance Sheets for these AROs, and we have recorded an indemnification asset of $1.1 million and $13.0 million with Prepaid expenses and other and Other noncurrent assets, respectively, on the Condensed Consolidated Balance Sheets.

The 222 megawatts of generation capacity from Colstrip Units 3 and 4 acquired from Avista (Avista Interests) on January 1, 2026, was identified as a key element in our strategy to achieve resource adequacy for customers, as outlined in our 2023 Montana Integrated Resource Plan. Noting the costs associated with operating this resource are not currently reflected in utility customer rates, in August 2025, we filed a temporary PCCAM tariff waiver request with the MPSC that could provide a near-term cost-recovery mechanism to offset a portion of the approximately $18.0 million in annual incremental operating and maintenance costs associated with the Avista Interests. This waiver requested that the MPSC allow us to keep 100 percent of the net revenue associated with certain designated power sales contracts up to the amount of the operating and maintenance expenses we incur associated with our Avista Interests. Furthermore, the waiver request indicated that any net revenues from the designated contracts exceeding the operating and maintenance expenses associated with our Avista Interests would continue to flow back to retail customers. In January 2026, the MPSC approved our PCCAM tariff waiver request on an interim basis with final approval or denial subject to the ongoing PCCAM docket process.

(3) Financing Activities

We exercised a five-year renewal option on a default supply procurement agreement, which we have recorded as a finance lease on our Condensed Consolidated Balance Sheets. As a result, the finance lease term was extended and will mature on June 30, 2031.

(4) Employee Benefit Plans

We sponsor and/or contribute to pension and postretirement health care and life insurance benefit plans for eligible employees. We contributed $2.0 million to our pension plans during the three months ended March 31, 2026. We expect to contribute an additional $9.5 million to our pension plans during the remainder of 2026.

(5) Commitments and Contingencies

LEGAL PROCEEDINGS

We are subject to various legal proceedings, governmental audits and claims that arise in the ordinary course of business. In our opinion, the amount of ultimate liability with respect to these other actions will not materially affect our financial position, results of operations, or cash flows.

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

STATEMENTS OF ACCUMULATED COMPREHENSIVE INCOME, COMPREHENSIVE INCOME, AND HEDGING ACTIVITIES
Report in columns (b),(c),(d) and (e) the amounts of accumulated other comprehensive income items, on a net-of-tax basis, where appropriate. Report in columns (f) and (g) the amounts of other categories of other cash flow hedges. For each category of hedges that have been accounted for as "fair value hedges", report the accounts affected and the related amounts in a footnote. Report data on a year-to-date basis.
Line No.	Item (a)	Unrealized Gains and Losses on Available-For-Sale Securities (b)	Minimum Pension Liability Adjustment (net amount) (c)	Foreign Currency Hedges (d)	Other Adjustments (e)	Other Cash Flow Hedges Interest Rate Swaps (f)	Other Cash Flow Hedges [Specify] (g)	Totals for each category of items recorded in Account 219 (h)	Net Income (Carried Forward from Page 116, Line 78) (i)	Total Comprehensive Income (j)
1	Balance of Account 219 at Beginning of Preceding Year		44,602		1,432,857	6,771,648		5,383,393
2	Preceding Quarter/Year to Date Reclassifications from Account 219 to Net Income					113,033		113,033
3	Preceding Quarter/Year to Date Changes in Fair Value				949			949
4	Total (lines 2 and 3)				949	113,033		113,982	66,486,712	66,600,694
5	Balance of Account 219 at End of Preceding Quarter/Year		44,602		1,433,806	6,658,615		5,269,411
6	Balance of Account 219 at Beginning of Current Year		44,602		1,451,534	6,319,518		4,912,586
7	Current Quarter/Year to Date Reclassifications from Account 219 to Net Income					113,033		113,033
8	Current Quarter/Year to Date Changes in Fair Value				1,149			1,149
9	Total (lines 7 and 8)				1,149	113,033		111,884	54,530,191	54,642,075
10	Balance of Account 219 at End of Current Quarter/Year		44,602		1,450,385	6,206,485		4,800,702

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

SUMMARY OF UTILITY PLANT AND ACCUMULATED PROVISIONS FOR DEPRECIATION. AMORTIZATION AND DEPLETION
Report in Column (c) the amount for electric function, in column (d) the amount for gas function, in column (e), (f), and (g) report other (specify) and in column (h) common function.
Line No.	Classification (a)	Total Company For the Current Year/Quarter Ended (b)	Electric (c)	Gas (d)	Other (Specify) (e)	Other (Specify) (f)	Other (Specify) (g)	Common (h)
1	UtilityPlantAbstract UTILITY PLANT
2	UtilityPlantInServiceAbstract In Service
3	UtilityPlantInServiceClassified Plant in Service (Classified)	7,137,357,526	5,556,694,485	1,367,124,194	(a) 1,766,266			211,772,581
4	UtilityPlantInServicePropertyUnderCapitalLeases Property Under Capital Leases	52,192,341				(b) 49,293,501	(c) 2,898,840
5	UtilityPlantInServicePlantPurchasedOrSold Plant Purchased or Sold	0
6	UtilityPlantInServiceCompletedConstructionNotClassified Completed Construction not Classified	0
7	UtilityPlantInServiceExperimentalPlantUnclassified Experimental Plant Unclassified	2,882,883	2,882,883
8	UtilityPlantInServiceClassifiedAndUnclassified Total (3 thru 7)	7,192,432,750	5,559,577,368	1,367,124,194	1,766,266	49,293,501	2,898,840	211,772,581
9	UtilityPlantLeasedToOthers Leased to Others
10	UtilityPlantHeldForFutureUse Held for Future Use	3,959,559	3,929,693	29,866
11	ConstructionWorkInProgress Construction Work in Progress	190,349,234	148,161,431	14,903,039	0			27,284,764
12	UtilityPlantAcquisitionAdjustment Acquisition Adjustments	639,671,961	639,671,961
13	UtilityPlantAndConstructionWorkInProgress Total Utility Plant (8 thru 12)	8,026,413,504	6,351,340,453	1,382,057,099	1,766,266	49,293,501	2,898,840	239,057,345
14	AccumulatedProvisionForDepreciationAmortizationAndDepletionOfPlantUtility Accumulated Provisions for Depreciation, Amortization, & Depletion	2,938,588,976	2,359,791,502	467,484,346	1,230,396	39,585,866		70,496,866
15	UtilityPlantNet Net Utility Plant (13 less 14)	5,087,824,528	3,991,548,951	914,572,753	535,870	9,707,635	2,898,840	168,560,479
16	DetailOfAccumulatedProvisionsForDepreciationAmortizationAndDepletionAbstract DETAIL OF ACCUMULATED PROVISIONS FOR DEPRECIATION, AMORTIZATION AND DEPLETION
17	AccumulatedProvisionForDepreciationAmortizationAndDepletionUtilityPlantInServiceAbstract In Service:
18	DepreciationUtilityPlantInService Depreciation	2,596,728,808	2,112,657,236	398,119,093	1,230,396	39,585,866		45,136,217
19	AmortizationAndDepletionOfProducingNaturalGasLandAndLandRightsutilityPlantInService Amortization and Depletion of Producing Natural Gas Land and Land Rights	60,412,655		60,412,655
20	AmortizationOfUndergroundStorageLandAndLandRightsutilityPlantInService Amortization of Underground Storage Land and Land Rights	0
21	AmortizationOfOtherUtilityPlantUtilityPlantInService Amortization of Other Utility Plant	69,304,485	34,991,238	8,952,598		0		25,360,649
22	DepreciationAmortizationAndDepletionUtilityPlantInService Total in Service (18 thru 21)	2,726,445,948	2,147,648,474	467,484,346	1,230,396	39,585,866		70,496,866
23	DepreciationAmortizationAndDepletionUtilityPlantLeasedToOthersAbstract Leased to Others
24	DepreciationUtilityPlantLeasedToOthers Depreciation	0
25	AmortizationAndDepletionUtilityPlantLeasedToOthers Amortization and Depletion	0
26	DepreciationAmortizationAndDepletionUtilityPlantLeasedToOthers Total Leased to Others (24 & 25)	0
27	DepreciationAndAmortizationUtilityPlantHeldForFutureUseAbstract Held for Future Use
28	DepreciationUtilityPlantHeldForFutureUse Depreciation	0
29	AmortizationUtilityPlantHeldForFutureUse Amortization	0
30	DepreciationAndAmortizationUtilityPlantHeldForFutureUse Total Held for Future Use (28 & 29)	0
31	AbandonmentOfLeases Abandonment of Leases (Natural Gas)	0
32	AmortizationOfPlantAcquisitionAdjustment Amortization of Plant Acquisition Adjustment	212,143,028	212,143,028
33	AccumulatedProvisionForDepreciationAmortizationAndDepletionOfPlantUtility Total Accum Prov (equals 14) (22,26,30,31,32)	2,938,588,976	2,359,791,502	467,484,346	1,230,396	39,585,866		70,496,866

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

FOOTNOTE DATA

(a) Concept: UtilityPlantInServiceClassified

This column represents regulated propane.

(b) Concept: UtilityPlantInServicePropertyUnderCapitalLeases

This column represents an electric default supply capacity and energy sales agreement classified as a capital lease.

This column represents our right of use (operating lease) assets.

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

Electric Plant In Service and Accum Provision For Depr by Function
Report below the original cost of plant in service by function. In addition to Account 101, include Account 102, and Account 106. Report in column (b) the original cost of plant in service and in column(c) the accumulated provision for depreciation and amortization by function.
Line No.	Item (a)	Plant in Service Balance at End of Quarter (b)	Accumulated Depreciation And Amortization Balance at End of Quarter (c)
1	Intangible Plant	22,488,903	34,991,238
2	Steam Production Plant	493,710,971	367,254,307
3	Nuclear Production Plant	0	0
4	Hydraulic Production - Conventional	688,857,228	152,921,266
5	Hydraulic Production - Pumped Storage	0	0
6	Solar Production Plant	2,963,166	1,491,539
7	Wind Production Plant	106,517,367	49,279,760
8	Other Renewable Production Plant
9	Other Production	480,343,347	44,855,492
10	Transmission	1,379,367,589	480,800,157
11	Distribution	2,242,586,699	928,895,187
12	Regional Transmission and Market Operation	0	0
13	Energy Storage Plant	8,917,096	783,771
14	General	133,825,002	86,375,757
15	TOTAL (Total of lines 1 through 14)	5,559,577,368	2,147,648,474

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

Transmission Service and Generation Interconnection Study Costs
Report the particulars (details) called for concerning the costs incurred and the reimbursements received for performing transmission service and generator interconnection studies. List each study separately. In column (a) provide the name of the study. In column (b) report the cost incurred to perform the study at the end of period. In column (c) report the account charged with the cost of the study. In column (d) report the amounts received for reimbursement of the study costs at end of period. In column (e) report the account credited with the reimbursement received for performing the study.
Line No.	DescriptionOfStudyPerformed Description (a)	StudyCostsIncurred Costs Incurred During Period (b)	StudyCostsAccountCharged Account Charged (c)	StudyCostsReimbursements Reimbursements Received During the Period (d)	StudyCostsAccountReimbursed Account Credited With Reimbursement (e)
1	Transmission Studies
2	FAC Studies	2,951	253		253
3	SIS Studies	42,323	253	54,907	253
4	Line Interconnection Studies	30,917	253	4,928	253
20	Total	76,191		59,835
21	Generation Studies
22	FAC Studies	9,968	253	8,434	253
23	Optional Studies	2,536	253	245,192	253
24	Large Load Studies	55,863	253	506,000	253
25	Cluster Studies	40,826	253	43,000	253
39	Total	109,193		785,758
40	Grand Total	185,384		845,593

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

OTHER REGULATORY ASSETS (Account 182.3)
Report below the particulars (details) called for concerning other regulatory assets, including rate order docket number, if applicable. Minor items (5% of the Balance in Account 182.3 at end of period, or amounts less than $100,000 which ever is less), may be grouped by classes. For Regulatory Assets being amortized, show period of amortization.
				CREDITS
Line No.	DescriptionAndPurposeOfOtherRegulatoryAssets Description and Purpose of Other Regulatory Assets (a)	OtherRegulatoryAssets Balance at Beginning of Current Quarter/Year (b)	IncreaseDecreaseInOtherRegulatoryAssets Debits (c)	OtherRegulatoryAssetsWrittenOffAccountCharged Written off During Quarter/Year Account Charged (d)	OtherRegulatoryAssetsWrittenOffRecovered Written off During the Period Amount (e)	OtherRegulatoryAssets Balance at end of Current Quarter/Year (f)
1	Flow-through Income Taxes (Montana)	557,159,180	5,939,354		0	563,098,534
2	Excess Deferred Income Taxes (Montana)	35,990,104	39,202		918,329	35,110,977
3	Basin Creek Capital Lease (Montana)	859,970	110,960		398,287	572,643
4	BPA Residential Exchange Program (Montana) - Docket 2018.8.49 Order 7630; Annual Amortization	727,522	391,873		0	1,119,395
5	Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization	18,733,985	1,648,220		4,621,069	15,761,136
6	FAS 106 (Montana) - Docket 93.6.24 and Docket 2009.9.129	133,086	755,132		434,305	453,913
7	FAS 112 (Montana) - Docket 93.6.24 and Docket 2009.9.129	3,475,330	0		0	3,475,330
8	Compensated Absences (Montana) - Docket 97.11.219	12,939,144	943,127		0	13,882,271
9	Pension Plan - MT	21,415,817	0		1,826,634	19,589,183
10	Montana Consumer Counsel Tax (Montana) - Docket 2018.10.67 - Order 7637	47,122	0		47,122	0
11	Montana Public Service Commission (Montana) - Docket 2017.9.78 - Order 7568	1,438,380	199,278		424,870	1,212,788
12	Montana Wildfire Mitigation	29,433,266	7,996,354		5,903,438	31,526,182
13	Asset Retirement Obligation (Montana)	12,701,422	626,886		355,716	12,972,592
14	Power Cost & Credit Mechanism (Montana)	39,896,989	13,308,274		2,076,888	51,128,375
15	Land Rents	3,859,000	0		0	3,859,000
44	TOTAL	738,810,317	31,958,660		17,006,658	753,762,319

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

OTHER REGULATORY LIABILITIES (Account 254)
Report below the particulars (details) called for concerning other regulatory liabilities, including rate order docket number, if applicable. Minor items (5% of the Balance in Account 254 at end of period, or amounts less than $100,000 which ever is less), may be grouped by classes. For Regulatory Liabilities being amortized, show period of amortization.
			DEBITS
Line No.	Description and Purpose of Other Regulatory Liabilities (a)	Balance at Beginning of Current Quarter/Year (b)	Account Credited (c)	Amount (d)	Credits (e)	Balance at End of Current Quarter/Year (f)
1	Excess Deferred Income Taxes (Montana)	101,544,808		2,122,343	0	99,422,465
2	Deferred Gas Storage Sales (Montana) - Docket D2001.1.1; Amortization 2001 - 2039	5,784,396		105,129	0	5,679,267
3	Montana Public Service Commission Consumer Counsel Taxes (Montana) - Dockets 2017.9.78 and 2018.10.67	0		240,302	355,576	115,274
4	CTC QF Over/Under Collections (Montana) - Docket 97.9.90 and Docket 2001.1.15; Annual Amortization	1,304,195		97,232	0	1,206,963
5	Property Tax Tracker (Montana) - Docket 2017.11.86 - Order 7580a; Annual Amortization	0		2,167,831	2,167,831	0
6	Natural Gas Regulatory Deferrals (Montana)	606,939		236,856	136,248	506,331
7	FAS 106 (Montana) - Docket 93.6.24 and Docket 2009.9.129	797,344		0	434,305	1,231,649
8	Deferred Electric Revenues	7,660,169		2,186,236	717,599	6,191,532
41	TOTAL	117,697,851		7,155,929	3,811,559	114,353,481

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

Electric Operating Revenues
The following instructions generally apply to the annual version of these pages. Do not report quarterly data in columns (c), (e), (f), and (g). Unbilled revenues and MWH related to unbilled revenues need not be reported separately as required in the annual version of these pages. Report below operating revenues for each prescribed account, and manufactured gas revenues in total. Report number of customers, columns (f) and (g), on the basis of meters, in addition to the number of flat rate accounts; except that where separate meter readings are added for billing purposes, one customer should be counted for each group of meters added. The average number of customers means the average of twelve figures at the close of each month. If increases or decreases from previous period (columns (c),(e), and (g)), are not derived from previously reported figures, explain any inconsistencies in a footnote. Disclose amounts of $250,000 or greater in a footnote for accounts 451, 456, and 457.2. Commercial and industrial Sales, Account 442, may be classified according to the basis of classification (Small or Commercial, and Large or Industrial) regularly used by the respondent if such basis of classification is not generally greater than 1000 Kw of demand. (See Account 442 of the Uniform System of Accounts. Explain basis of classification in a footnote.) See page 108, Important Changes During Period, for important new territory added and important rate increase or decreases. For Lines 2,4,5,and 6, see Page 304 for amounts relating to unbilled revenue by accounts. Include unmetered sales. Provide details of such Sales in a footnote.
Line No.	Title of Account (a)	Operating Revenues Year to Date Quarterly/Annual (b)	Operating Revenues Previous year (no Quarterly) (c)	MEGAWATT HOURS SOLD Year to Date Quarterly/Annual (d)	MEGAWATT HOURS SOLD Amount Previous year (no Quarterly) (e)	AVG.NO. CUSTOMERS PER MONTH Current Year (no Quarterly) (f)	AVG.NO. CUSTOMERS PER MONTH Previous Year (no Quarterly) (g)
1	SalesOfElectricityHeadingAbstract Sales of Electricity
2	ResidentialSalesAbstract (440) Residential Sales	119,693,442	114,977,400	783,142	901,803
3	CommercialAndIndustrialSalesAbstract (442) Commercial and Industrial Sales
4	CommercialSalesAbstract Small (or Comm.) (See Instr. 4)	105,675,686	96,938,940	767,690	823,993
5	IndustrialSalesAbstract Large (or Ind.) (See Instr. 4)	11,800,447	10,099,777	82,738	74,361
6	PublicStreetAndHighwayLightingAbstract (444) Public Street and Highway Lighting	4,354,694	3,635,091	6,491	6,472
7	OtherSalesToPublicAuthoritiesAbstract (445) Other Sales to Public Authorities
8	SalesToRailroadsAndRailwaysAbstract (446) Sales to Railroads and Railways
9	InterdepartmentalSalesAbstract (448) Interdepartmental Sales	248,294	224,205	1,773	1,896
10	SalesToUltimateConsumersAbstract TOTAL Sales to Ultimate Consumers	241,772,563	225,875,413	1,641,834	1,808,525
11	SalesForResaleAbstract (447) Sales for Resale	7,599,930	8,841,176	246,791	212,550
12	SalesOfElectricityAbstract TOTAL Sales of Electricity	249,372,493	234,716,589	1,888,625	2,021,075
13	ProvisionForRateRefundsAbstract (Less) (449.1) Provision for Rate Refunds	1,650,364
14	RevenuesNetOfProvisionForRefundsAbstract TOTAL Revenues Before Prov. for Refunds	251,022,857	234,716,589	1,888,625	2,021,075
15	OtherOperatingRevenuesAbstract Other Operating Revenues
16	ForfeitedDiscounts (450) Forfeited Discounts
17	MiscellaneousServiceRevenues (451) Miscellaneous Service Revenues	3,527	4,021
18	SalesOfWaterAndWaterPower (453) Sales of Water and Water Power
19	RentFromElectricProperty (454) Rent from Electric Property	1,172,515	1,267,226
20	InterdepartmentalRents (455) Interdepartmental Rents
21	OtherElectricRevenue (456) Other Electric Revenues	(a) 5,497,837	3,905,699
22	RevenuesFromTransmissionOfElectricityOfOthers (456.1) Revenues from Transmission of Electricity of Others	27,401,743	25,174,518
23	RegionalTransmissionServiceRevenues (457.1) Regional Control Service Revenues
24	MiscellaneousRevenue (457.2) Miscellaneous Revenues
25	OtherMiscellaneousOperatingRevenues Other Miscellaneous Operating Revenues
26	OtherOperatingRevenues TOTAL Other Operating Revenues	34,068,568	30,343,422
27	ElectricOperatingRevenues TOTAL Electric Operating Revenues	285,091,425	265,060,011
Line12, column (b) includes $ of unbilled revenues.
Line12, column (d) includes MWH relating to unbilled revenues

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

FOOTNOTE DATA

(a) Concept: OtherElectricRevenue

YTD March	YTD March
Total Electric Revenue	2025
Ancillary Services:
Scheduling, System Control and Dispatch	487,082
Regulation and Frequency Response	276,541
Energy Imbalance	2,509,905
Other Transmission Revenue	437,523
Low Income Housing	913,764
Steam Sales	-
Sale of Materials	592
Miscellaneous	872,430
	5,497,837

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

REGIONAL TRANSMISSION SERVICE REVENUES (Account 457.1)
The respondent shall report below the revenue collected for each service (i.e., control area administration, market administration, etc.) performed pursuant to a Commission approved tariff. All amounts separately billed must be detailed below.
Line No.	Description of Service (a)	Balance at End of Quarter 1 (b)	Balance at End of Quarter 2 (c)	Balance at End of Quarter 3 (d)	Balance at End of Year (e)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46	TOTAL

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

ELECTRIC PRODUCTION, OTHER POWER SUPPLY EXPENSES, TRANSMISSION AND DISTRIBUTION EXPENSES

Report Electric production, other power supply expenses, transmission, regional market, and distribution expenses through the reporting period.
Line No.	Account (a)	Year to Date Quarter (b)
1	PowerProductionExpensesAbstract 1. POWER PRODUCTION AND OTHER SUPPLY EXPENSES
2	SteamPowerGenerationOperationsExpense Steam Power Generation - Operation (500-509)	19,151,348
3	SteamPowerGenerationMaintenanceExpense Steam Power Generation – Maintenance (510-515)	3,758,877
4	PowerProductionExpensesSteamPower Total Power Production Expenses - Steam Power	22,910,225
5	NuclearPowerGenerationOperationsExpense Nuclear Power Generation – Operation (517-525)
6	NuclearPowerGenerationMaintenanceExpense Nuclear Power Generation – Maintenance (528-532)
7	PowerProductionExpensesNuclearPower Total Power Production Expenses - Nuclear Power
8	HydraulicPowerGenerationOperationsExpense Hydraulic Power Generation – Operation (535-540.1)	4,074,062
9	HydraulicPowerGenerationMaintenanceExpense Hydraulic Power Generation – Maintenance (541-545.1)	453,101
10	PowerProductionExpensesHydraulicPower Total Power Production Expenses - Hydraulic Power	4,527,163
10.1	SolarPowerGenerationOperationsExpense Solar Generation – Operation (558.1-558.5)
10.2	SolarPowerGenerationMaintenanceExpense Solar Generation – Maintenance (558.6-558.12)	5,914
10.3	PowerProductionExpensesSolarPower Total Power Production Expenses - Solar	5,914
10.4	WindPowerGenerationOperationsExpense Wind Generation – Operation (558.13-558.17)	671,283
10.5	WindPowerGenerationMaintenanceExpense Wind Generation – Maintenance (558.18-558.24)	15,722
10.6	PowerProductionExpensesWindPower Total Power Production Expenses - Wind	687,005
10.7	OtherRenewableGenerationOperationsExpense Other Renewable Generation – Operation (559.1-559.5)
10.8	OtherRenewableGenerationMaintenanceExpense Other Renewable Generation – Maintenance (559.6-559.16)
10.9	PowerProductionExpensesOtherRenewable Total Power Production Expenses – Other Renewable
11	RentsOtherPowerGeneration Other Power Generation – Operation (546-550.1)	8,291,562
12	MaintenanceOfEnergyStorageEquipmentOtherPowerGeneration Other Power Generation – Maintenance (551-554.1)	494,988
13	MaintenanceOfMiscellaneousOtherPowerGenerationPlant Total Power Production Expenses - Other Power	8,786,550
14	OtherPowerSuplyExpensesAbstract Other Power Supply Expenses
15	PurchasedPower (555) Purchased Power	46,597,221
15.1	PowerPurchasedForStorageOperations (555.1) Power Purchased for Storage Operations
15.2	BundledEnvironmentalCredits (555.2) Bundled Environmental Credits	1,390,791
15.3	UnbundledEnvironmentalCredits (555.3) Unbundled Environmental Credits
16	SystemControlAndLoadDispatchingElectric (556) System Control and Load Dispatching
17	OtherExpensesOtherPowerSupplyExpenses (557) Other Expenses	10,523,661
18	OtherPowerSupplyExpense Total Other Power Supply Expenses (line 15-17)	37,464,351
19	PowerProductionExpenses Total Power Production Expenses (Total of lines 4, 7, 10, 10.3, 10.6, 10.9, 13 and 18)	74,381,208
20	TransmissionExpensesAbstract 2. TRANSMISSION EXPENSES
21	TransmissionExpensesOperationAbstract Transmission Operation Expenses
22	OperationSupervisionAndEngineeringElectricTransmissionExpenses (560) Operation Supervision and Engineering	1,093,871
24	LoadDispatchReliability (561.1) Load Dispatch-Reliability	249,280
25	LoadDispatchMonitorAndOperateTransmissionSystem (561.2) Load Dispatch-Monitor and Operate Transmission System	203,239
26	LoadDispatchTransmissionServiceAndScheduling (561.3) Load Dispatch-Transmission Service and Scheduling	351,317
27	SchedulingSystemControlAndDispatchServices (561.4) Scheduling, System Control and Dispatch Services
28	ReliabilityPlanningAndStandardsDevelopment (561.5) Reliability, Planning and Standards Development
29	TransmissionServiceStudies (561.6) Transmission Service Studies
30	GenerationInterconnectionStudies (561.7) Generation Interconnection Studies
31	ReliabilityPlanningAndStandardsDevelopmentServices (561.8) Reliability, Planning and Standards Development Services	30,000
32	StationExpensesTransmissionExpense (562) Station Expenses	518,019
33	OverheadLineExpense (563) Overhead Lines Expenses	607,050
34	UndergroundLineExpensesTransmissionExpense (564) Underground Lines Expenses
35	TransmissionOfElectricityByOthers (565) Transmission of Electricity by Others	1,563,283
36	MiscellaneousTransmissionExpenses (566) Miscellaneous Transmission Expenses	22,984
37	RentsTransmissionElectricExpense (567) Rents	226,163
38	OperationSuppliesAndExpensesTransmissionExpense (567.1) Operation Supplies and Expenses (Non-Major)
39	TransmissionOperationExpense TOTAL Transmission Operation Expenses (Lines 22 - 38)	4,865,206
40	TransmissionMaintenanceAbstract Transmission Maintenance Expenses
41	MaintenanceSupervisionAndEngineeringElectricTransmissionExpenses (568) Maintenance Supervision and Engineering	102,507
42	MaintenanceOfStructuresTransmissionExpense (569) Maintenance of Structures	5,442
43	MaintenanceOfComputerHardwareTransmission (569.1) Maintenance of Computer Hardware	410,346
44	MaintenanceOfComputerSoftwareTransmission (569.2) Maintenance of Computer Software	87,605
45	MaintenanceOfCommunicationEquipmentElectricTransmission (569.3) Maintenance of Communication Equipment	53,961
46	MaintenanceOfMiscellaneousRegionalTransmissionPlant (569.4) Maintenance of Miscellaneous Regional Transmission Plant
47	MaintenanceOfStationEquipmentTransmission (570) Maintenance of Station Equipment	141,145
48	MaintenanceOfOverheadLinesTransmission (571) Maintenance of Overhead Lines	993,748
49	MaintenanceOfUndergroundLinesTransmission (572) Maintenance of Underground Lines
50	MaintenanceOfMiscellaneousTransmissionPlant (573) Maintenance of Miscellaneous Transmission Plant
51	MaintenanceOfTransmissionPlant (574) Maintenance of Transmission Plant
52	TransmissionMaintenanceExpenseElectric TOTAL Transmission Maintenance Expenses (Lines 41 – 51)	1,794,754
53	TransmissionExpenses Total Transmission Expenses (Lines 39 and 52)	6,659,960
54	RegionalMarketExpensesAbstract 3. REGIONAL MARKET EXPENSES
55	RegionalMarketExpensesOperationAbstract Regional Market Operation Expenses
56	OperationSupervision (575.1) Operation Supervision
57	DayAheadAndRealTimeMarketAdministration (575.2) Day-Ahead and Real-Time Market Facilitation
58	TransmissionRightsMarketAdministration (575.3) Transmission Rights Market Facilitation
59	CapacityMarketAdministration (575.4) Capacity Market Facilitation
60	AncillaryServicesMarketAdministration (575.5) Ancillary Services Market Facilitation
61	MarketMonitoringAndCompliance (575.6) Market Monitoring and Compliance
62	MarketFacilitationMonitoringAndComplianceServices (575.7) Market Facilitation, Monitoring and Compliance Services
63	RegionalMarketOperationExpense Regional Market Operation Expenses (Lines 55 - 62)
64	RegionalMarketExpensesMaintenanceAbstract Regional Market Maintenance Expenses
65	MaintenanceOfStructuresAndImprovementsRegionalMarketExpenses (576.1) Maintenance of Structures and Improvements
66	MaintenanceOfComputerHardware (576.2) Maintenance of Computer Hardware
67	MaintenanceOfComputerSoftware (576.3) Maintenance of Computer Software
68	MaintenanceOfCommunicationEquipmentRegionalMarketExpenses (576.4) Maintenance of Communication Equipment
69	MaintenanceOfMiscellaneousMarketOperationPlant (576.5) Maintenance of Miscellaneous Market Operation Plant
70	RegionalMarketMaintenanceExpense Regional Market Maintenance Expenses (Lines 65-69)
71	RegionalMarketExpenses TOTAL Regional Control and Market Operation Expenses (Lines 63,70)
71.1	EnergyStorageExpensesAbstract 4. ENERGY STORAGE EXPENSES
71.2	EnergyStorageOperationExpenses Energy Storage Operation Expenses (577.1-577.5)
71.3	EnergyStorageMaintenanceExpenses Energy Storage Maintenance Expenses (578.1-578.7)
71.4	EnergyStorageExpenses Total Energy Storage Expenses (Lines 71.2 and 71.3)
72	DistributionExpensesAbstract 5. DISTRIBUTION EXPENSES
73	DistributionOperationExpensesElectric Distribution Operation Expenses (580-589)	4,006,687
74	DistributionMaintenanceExpenseElectric Distribution Maintenance Expenses (590-598)	6,374,428
75	DistributionExpenses Total Distribution Expenses (Lines 73 and 74)	10,381,115

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

Electric Customer Accts, Service, Sales, Admin and General Expenses
Report the amount of expenses for customer accounts, service, sales, and administrative and general expenses year to date.
Line No.	Account (a)	Year to Date Quarter (b)
-	CustomerAccountsExpensesOperationsAbstract Operation
1	CustomerAccountExpenses (901-905) Customer Accounts Expenses	3,380,257
2	CustomerServiceAndInformationExpenses (907-910) Customer Service and Information Expenses	937,090
3	SalesExpenses (911-917) Sales Expenses	328,345
4	AdministrativeAndGeneralExpensesAbstract 9. ADMINISTRATIVE AND GENERAL EXPENSES
5	AdministrativeAndGeneralExpensesOperationAbstract Operation
6	AdministrativeAndGeneralSalaries (920) Administrative and General Salaries	8,194,575
7	OfficeSuppliesAndExpenses (921) Office Supplies and Expenses	1,680,649
8	AdministrativeExpensesTransferredCredit (Less) (922) Administrative Expenses Transferred-Credit	1,502,994
9	OutsideServicesEmployed (923) Outside Services Employed	1,978,547
10	PropertyInsurance (924) Property Insurance	1,162,183
11	InjuriesAndDamages (925) Injuries and Damages	4,938,480
12	EmployeePensionsAndBenefits (926) Employee Pensions and Benefits	6,075,652
13	FranchiseRequirements (927) Franchise Requirements
14	RegulatoryCommissionExpenses (928) Regulatory Commission Expenses	1,067,282
15	DuplicateChargesCredit (929) (Less) Duplicate Charges-Cr.
16	GeneralAdvertisingExpenses (930.1) General Advertising Expenses	105,266
17	MiscellaneousGeneralExpenses (930.2) Miscellaneous General Expenses	4,225,380
18	RentsAdministrativeAndGeneralExpense (931) Rents	117,484
19	AdministrativeAndGeneralOperationExpense TOTAL Operation (Total of lines 6 thru 18)	28,042,504
20	AdministrativeAndGeneralExpensesMaintenanceAbstract Maintenance
21	MaintenanceOfGeneralPlant (935) Maintenance of General Plant	826,623
21.1	MaintenanceOfComputerHardwareAdministrativeAndGeneralExpenses (935.1) Maintenance of Computer Hardware	886
21.2	MaintenanceOfComputerSoftwareAdministrativeAndGeneralExpenses (935.2) Maintenance of Computer Software	2,929,665
21.3	MaintenanceOfCommunicationEquipmentAdministrativeAndGeneralExpenses (935.3) Maintenance of Communication Equipment	510,516
21.4	AdministrativeAndGeneralMaintenanceExpenses TOTAL Maintenance (Enter Total of lines 21 thru 21.3)	4,267,690
22	AdministrativeAndGeneralExpenses TOTAL Administrative and General Expenses (Total of lines 19 and 21.4)	32,310,194

Name of Respondent:

NorthWestern Corporation

This report is:

(1)

☑ An Original

(2)

☐ A Resubmission

Date of Report:

03/31/2026

Year/Period of Report

End of:

2026

TRANSMISSION OF ELECTRICITY FOR OTHERS (Account 456.1) (Including transactions referred to as "wheeling")
Report all transmission of electricity, i.e., wheeling, provided for other electric utilities, cooperatives, other public authorities, qualifying facilities, non-traditional utility suppliers and ultimate customers for the quarter. Use a separate line of data for each distinct type of transmission service involving the entities listed in column (a), (b) and (c). Report in column (a) the company or public authority that paid for the transmission service. Report in column (b) the company or public authority that the energy was received from and in column (c) the company or public authority that the energy was delivered to. Provide the full name of each company or public authority. Do not abbreviate or truncate name or use acronyms. Explain in a footnote any ownership interest in or affiliation the respondent has with the entities listed in columns (a), (b) or (c). In column (d) enter a Statistical Classification code based on the original contractual terms and conditions of the service as follows: FNO - Firm Network Service for Others, FNS - Firm Network Transmission Service for Self, LFP - "Long-Term Firm Point to Point Transmission Service, OLF - Other Long-Term Firm Transmission Service, SFP - Short-Term Firm Point to Point Transmission Reservation, NF - non-firm transmission service, OS - Other Transmission Service and AD - Out-of-Period Adjustments. Use this code for any accounting adjustments or "true-ups" for service provided in prior reporting periods. Provide an explanation in a footnote for each adjustment. See General Instruction for definitions of codes. In column (e), identify the FERC Rate Schedule or Tariff Number, On separate lines, list all FERC rate schedules or contract designations under which service, as identified in column (d), is provided. Report receipt and delivery locations for all single contract path, "point to point" transmission service. In column (f), report the designation for the substation, or other appropriate identification for where energy was received as specified in the contract. In column (g) report the designation for the substation, or other appropriate identification for where energy was delivered as specified in the contract. Report in column (h) the number of megawatts of billing demand that is specified in the firm transmission service contract. Demand reported in column (h) must be in megawatts. Footnote any demand not stated on a megawatts basis and explain. Report in column (i) and (j) the total megawatthours received and delivered. In column (k) through (n), report the revenue amounts as shown on bills or vouchers. In column (k), provide revenues from demand charges related to the billing demand reported in column (h). In column (I), provide revenues from energy charges related to the amount of energy transferred. In column (m), provide the total revenues from all other charges on bills or vouchers rendered, including out of period adjustments. Explain in a footnote all components of the amount shown in column (m). Report in column (n) the total charge shown on bills rendered to the entity listed in column (a). If no monetary settlement was made, enter zero (0) in column (n). Provide a footnote explaining the nature of the non-monetary settlement, including the amount and type of energy or service rendered. The total amounts in columns (i) and (j) must be reported as Transmission Received and Transmission Delivered for annual report purposes only on Page 401, Lines 16 and 17, respectively. Footnote entries and provide explanations following all required data.
									TRANSFER OF ENERGY		REVENUE FROM TRANSMISSION OF ELECTRICITY FOR OTHERS
Line No.	PaymentByCompanyOrPublicAuthority Payment By (Company of Public Authority) (Footnote Affiliation) (a)	TransmissionEnergyReceivedFromCompanyOrPublicAuthorityName Energy Received From (Company of Public Authority) (Footnote Affiliation) (b)	TransmissionEnergyDeliveredToCompanyOrPublicAuthorityName Energy Delivered To (Company of Public Authority) (Footnote Affiliation) (c)	StatisticalClassificationCode Statistical Classification (d)	RateScheduleTariffNumber Ferc Rate Schedule of Tariff Number (e)	TransmissionPointOfReceipt Point of Receipt (Substation or Other Designation) (f)	TransmissionPointOfDelivery Point of Delivery (Substation or Other Designation) (g)	BillingDemand Billing Demand (MW) (h)	TransmissionOfElectricityForOthersEnergyReceived Megawatt Hours Received (i)	TransmissionOfElectricityForOthersEnergyDelivered Megawatt Hours Delivered (j)	Demand Charges ($) (k)	Energy Charges ($) (l)	Other Charges ($) (m)	RevenuesFromTransmissionOfElectricityForOthers Total Revenues ($) (k+l+m) (n)
1	Ash Grove Cement	Talen Energy	Ash Grove Cement	FNO	Montana OATT	As Available	Clancy, MT	7	8,392	8,392	61,755	0	0	61,755
2	Aspen Air U.S., LLC	Talen Energy	Aspen Air Corporation	FNO	Montana OATT	Colstrip	Billings, MT	11	13,105	13,105	79,315	0	0	79,315
3	Beartooth Electric Cooperative, Inc.	WAPA & Energy Keepers Inc.	Beartooth Electric Cooperative, Inc.	FNO	Montana OATT	Fort Peck & Kerr	Various in Montana	18	25,048	25,048	194,496	0	0	194,496
4	Benefis Health Systems	Guzman Energy	Benefis Health Systems	FNO	Montana OATT	Hardin	Various in Montana	7	7,682	7,682	58,185	0	0	58,185
5	Big Horn County Electric Coop. Inc.	Northwestern Energy/WAPA	Big Horn County Electric Coop. Inc.	FNO	Montana OATT	Various & Great Falls	Various in Montana	18	19,899	19,899	150,692	0	0	150,692
6	Bonneville Power Administration	BPA	Bonneville Power Administration	FNO	Montana OATT	BPAT.NWMT	Various in Montana	202	242,285	242,285	1,815,941	0	0	1,815,941
7	Basin Electric Power Cooperative	Morgan Stanley, WAPA	Basin Electric Power Cooperative	FNO	Montana OATT	BPAT.NWMT & Great Falls	Various NWMT & WAUW	164	231,305	231,305	1,702,743	0	0	1,702,743
8	Basin Electric Power Cooperative	Basin Electric, WAPA, Morgan Stanley	Basin Electric Power Cooperative	FNO	Montana OATT	BPAT.NWMT & Great Falls	Various NWMT & WAUW	15	22,076	22,076	153,126	0	0	153,126
9	CHS, Inc.	Mercuria	CHS, Inc.	FNO	Montana OATT	BPAT.NWMT & MATL.NWMT	Various in Montana	58	91,597	91,597	561,975	0	0	561,975
10	City of Great Falls	Guzman Energy	City of Great Falls	FNO	Montana OATT	Hardin	Various in Montana	6	4,337	4,337	31,947	0	0	31,947
11	Talen Montana, LLC	Talen Energy	Colstrip Steam Electric Station	FNO	Montana OATT	Colstrip	Nichols Pump Sub	10	4,147	4,147	39,663	0	0	39,663
12	Atlas Power, LLC	Portland General Electric	Atlas Power, LLC	FNO	Montana OATT	Colstrip	Butte, MT	75	140,947	140,947	854,282	0	0	854,282
13	Phillips 66 Company	Phillips 66 Trading and Maketing	Phillips 66 Company	FNO	Montana OATT	BPAT.NWMT	Various in Montana	70	122,306	122,306	713,572	0	0	713,572
14	Par Montana, LLC	Phillips 66 Trading and Maketing	Par Montana, LLC	FNO	Montana OATT	AVAT.NWMT	Billings, MT	35	65,352	65,352	432,405	0	0	432,405
15	General Mills Operations, LLC	Talen Energy	General Mills Operations, LLC	FNO	Montana OATT	Colstrip	Great Falls, MT	4	5,023	5,023	28,997	0	0	28,997
16	Great Falls Public Schools	Energy Keepers Inc.	Great Falls Public Schools	FNO	Montana OATT	Kerr	Great Falls, MT	3	2,519	2,519	17,195	0	0	17,195
17	GCC Three Forks, LLC	Various	GCC Three Forks, LLC	FNO	Montana OATT	As Available	Three Forks, MT	8	7,923	7,923	58,224	0	0	58,224
18	Magris Talc USA, Inc.	Energy Keepers Inc.	Magris Talc USA, Inc.	FNO	Montana OATT	Kerr	Three Forks, MT	6	5,853	5,853	38,995	0	0	38,995
19	DFA Dairy Brands Fluid, LLC	Talen Energy	DFA Dairy Brands Fluid, LLC	FNO	Montana OATT	Colstrip	Various in Montana	1	1,427	1,427	9,346	0	0	9,346
20	Calumet Refining, LLC	Talen Energy	Calumet Montana Refining Company, Inc.	FNO	Montana OATT	Colstrip	Great Falls, MT	25	42,393	42,393	256,094	0	0	256,094
21	Montana Resources	Energy Keepers, Inc.	Montana Resources	FNO	Montana OATT	BPAT.NWMT & Kerr	Butte, MT	50	89,235	89,235	537,985	0	0	537,985
22	REC Silicon Company	Shell Energy	REC Silicon Company	FNO	Montana OATT	BPAT.NWMT	Butte, MT	75	29,824	29,824	191,516	0	0	191,516
23	Roseburg Forest Products Company	Shell Energy	Roseburg Forest Products Company	FNO	Montana OATT	BPAT.NWMT	Missoula, MT	0	0	0	49	0	0	49
24	Sibanye-Stillwater	Various	Stillwater Mining Company	FNO	Montana OATT	As Available	Various in Montana	46	41,937	41,937	261,330	0	0	261,330
25	Western Area Power Administration	WAPA	Western Area Power Administration	FNO	Montana OATT	Crossover	Various NWMT & WAUW	4	2	2	9,524	0	0	9,524
26	Montana State University - Bozeman	WAPA	Montana State University - Bozeman	FNO	Montana OATT	Fort Peck West	Great Falls, MT	4	4,799	4,799	26,736	0	0	26,736
27	Western Area Power Administration	WAPA	Malmstrom Air Force Base	FNO	Montana OATT	Fort Peck West	Great Falls, MT	4	7,335	7,335	45,781	0	0	45,781
28	AlbertaEx, L.P.	AVA-NWMT	AVAT.NWMT-MATL.NWMT	NF	Montana OATT	AVAT.NWMT	MATL.NWMT	0	300	300	0	1,812	0	1,812
29	AlbertaEx, L.P.	BPAT-NWMT	BPAT.NWMT-MATL.NWMT	NF	Montana OATT	BPAT.NWMT	MATL.NWMT	0	537	537	0	3,243	0	3,243
30	AlbertaEx, L.P.	GWA-NWMT	GLWND1-MATL.NWMT	NF	Montana OATT	GLWND1	MATL.NWMT	0	2	2	0	12	0	12
31	AlbertaEx, L.P.	GWA-NWMT	GLWND2-MATL.NWMT	NF	Montana OATT	GLWND2	MATL.NWMT	0	1	1	0	6	0	6
32	AlbertaEx, L.P.	NWMT-BPAT	MATL.NWMT-BPAT.NWMT	NF	Montana OATT	MATL.NWMT	BPAT.NWMT	0	1,951	1,951	0	11,784	0	11,784
33	AlbertaEx, L.P.	NWMT-GWA	MATL.NWMT-GLWND1	NF	Montana OATT	MATL.NWMT	GLWND1	0	3	3	0	18	0	18
34	AlbertaEx, L.P.	NWMT-GWA	MATL.NWMT-GLWND2	NF	Montana OATT	MATL.NWMT	GLWND2	0	1	1	0	6	0	6
35	AlbertaEx, L.P.	NWMT-NWMT	NWMTIMBALANC-MATL.NWMT	NF	Montana OATT	NWMTIMBALANC	MATL.NWMT	0	1	1	0	6	0	6
36	Altop Energy Trading LLC	PPW-WAPA	YTP-CROSSOVER	NF	Montana OATT	YTP	CROSSOVER	0	1,221	1,221	0	7,377	0	7,377
37	Avista Corporation	NWMT-AVA	CLEARWATER-AVAT.NWMT	LFP	Montana OATT	CLEARWATER	AVAT.NWMT	100	215,900	215,900	1,318,475	0	0	1,318,475
38	Basin Electric Power Cooperative	AVA-WAPA	AVAT.NWMT-GREATFALLS	NF	Montana OATT	AVAT.NWMT	GREATFALLS	0	55	55	0	332	0	332
39	Basin Electric Power Cooperative	BPAT-WAPA	BPAT.NWMT-GREATFALLS	NF	Montana OATT	BPAT.NWMT	GREATFALLS	0	83	83	0	501	0	501
40	Basin Electric Power Cooperative	NWMT-WAUW	BROADVIEW-GREATFALLS	NF	Montana OATT	BROADVIEW	GREATFALLS	0	35	35	0	211	0	211
41	Basin Electric Power Cooperative	NWMT-WAUW	COLSTRIP-GREATFALLS	NF	Montana OATT	COLSTRIP	GREATFALLS	0	149	149	0	900	0	900
42	Basin Electric Power Cooperative	NWMT-WAUW	MATL.NWMT-GREATFALLS	NF	Montana OATT	MATL.NWMT	GREATFALLS	0	80	80	0	483	0	483
43	Basin Electric Power Cooperative	PPW-NWMT	YTP-NWMT.SYSTEM	NF	Montana OATT	YTP	NWMT.SYSTEM	0	50	50	0	302	0	302
44	Basin Electric Power Cooperative	PPW-WAPA	YTP-CROSSOVER	NF	Montana OATT	YTP	CROSSOVER	0	40	40	0	242	0	242
45	Basin Electric Power Cooperative	PPW-WAPA	YTP-GREATFALLS	NF	Montana OATT	YTP	GREATFALLS	0	1,461	1,461	0	8,824	0	8,824
46	Basin Electric Power Cooperative	WAPA-WAPA	CROSSOVER-GREATFALLS	NF	Montana OATT	CROSSOVER	GREATFALLS	0	247	247	0	1,492	0	1,492
47	Black Hills Power Inc.	NWMT-PPW	COLSTRIP-YTP	NF	Montana OATT	COLSTRIP	YTP	0	775	775	0	4,681	0	4,681
48	Bonneville Power Administration	BPAT-NWMT	BPAT.NWMT-NWMT.SYSTEM	NF	Montana OATT	BPAT.NWMT	NWMT.SYSTEM	0	13,001	13,001	0	78,526	0	78,526
49	Bonneville Power Administration	BPAT-PPW	BPAT.NWMT-BRDY	NF	Montana OATT	BPAT.NWMT	BRDY	0	94	94	0	568	0	568
50	Bonneville Power Administration	BPAT-PPW	BPAT.NWMT-YTP	NF	Montana OATT	BPAT.NWMT	YTP	0	111	111	0	670	0	670
51	Bonneville Power Administration	BPAT-WAPA	BPAT.NWMT-GREATFALLS	NF	Montana OATT	BPAT.NWMT	GREATFALLS	0	158	158	0	954	0	954
52	CP Energy Marketing (US) Inc.	BPAT-NWMT	BPAT.NWMT-MATL.NWMT	NF	Montana OATT	BPAT.NWMT	MATL.NWMT	0	2,244	2,244	0	13,554	0	13,554
53	CP Energy Marketing (US) Inc.	BPAT-NWMT	BPAT.NWMT-NWMT.SYSTEM	NF	Montana OATT	BPAT.NWMT	NWMT.SYSTEM	0	114	114	0	689	0	689
54	CP Energy Marketing (US) Inc.	BPAT-WAPA	BPAT.NWMT-CROSSOVER	NF	Montana OATT	BPAT.NWMT	CROSSOVER	0	167	167	0	1,009	0	1,009
55	CP Energy Marketing (US) Inc.	NWMT-PACE	MATL.NWMT-YTP	NF	Montana OATT	MATL.NWMT	YTP	0	26	26	0	157	0	157
56	Cycle Power Partners, LLC	NWMT-PACE	HORSESHOE-BRDY	NF	Montana OATT	HORSESHOE	BRDY	0	149	149	0	900	0	900
57	Cycle Power Partners, LLC	NWMT-PACE	HORSESHOE-JEFF	NF	Montana OATT	HORSESHOE	JEFF	0	7,412	7,412	0	44,768	0	44,768
58	Dynasty Power Inc.	BPAT-NWMT	BPAT.NWMT-MATL.NWMT	NF	Montana OATT	BPAT.NWMT	MATL.NWMT	0	1,070	1,070	0	6,463	0	6,463
59	Dynasty Power Inc.	BPAT-PPW	BPAT.NWMT-YTP	NF	Montana OATT	BPAT.NWMT	YTP	0	140	140	0	846	0	846
60	Dynasty Power Inc.	BPAT-WAPA	BPAT.NWMT-CROSSOVER	NF	Montana OATT	BPAT.NWMT	CROSSOVER	0	10,235	10,235	0	61,819	0	61,819
61	Dynasty Power Inc.	NWMT-BPAT	MATL.NWMT-BPAT.NWMT	NF	Montana OATT	MATL.NWMT	BPAT.NWMT	0	26	26	0	157	0	157
62	Dynasty Power Inc.	NWMT-WAUW	MATL.NWMT-CROSSOVER	NF	Montana OATT	MATL.NWMT	CROSSOVER	0	42	42	0	254	0	254
63	Dynasty Power Inc.	PPW-WAPA	YTP-CROSSOVER	NF	Montana OATT	YTP	CROSSOVER	0	925	925	0	5,587	0	5,587
64	Dynasty Power Inc.	WAPA-BPAT	CROSSOVER-BPAT.NWMT	NF	Montana OATT	CROSSOVER	BPAT.NWMT	0	2,151	2,151	0	12,992	0	12,992
65	Dynasty Power Inc.	WAPA-PPW	CROSSOVER-BRDY	NF	Montana OATT	CROSSOVER	BRDY	0	76	76	0	459	0	459
66	EDF Trading North America, LLC	AVA-AVA	COLSTRIP-AVAT.NWMT	NF	Montana OATT	COLSTRIP	AVAT.NWMT	0	250	250	0	1,510	0	1,510
67	EDF Trading North America, LLC	BPAT-NWMT	BPAT.NWMT-NWMT.SYSTEM	NF	Montana OATT	BPAT.NWMT	NWMT.SYSTEM	0	152	152	0	918	0	918
68	EDF Trading North America, LLC	NWMT-AVA	COLSTRIP-AVAT.NWMT	NF	Montana OATT	COLSTRIP	AVAT.NWMT	0	40	40	0	242	0	242
69	EDF Trading North America, LLC	NWMT-BPAT	COLSTRIP-BPAT.NWMT	NF	Montana OATT	COLSTRIP	BPAT.NWMT	0	7,921	7,921	0	47,843	0	47,843
70	EDF Trading North America, LLC	NWMT-NWMT	COLSTRIP-COLSTRIP	NF	Montana OATT	COLSTRIP	COLSTRIP	0	3,730	3,730	0	22,529	0	22,529
71	EDF Trading North America, LLC	NWMT-NWMT	COLSTRIP-MATL.NWMT	NF	Montana OATT	COLSTRIP	MATL.NWMT	0	321	321	0	1,939	0	1,939
72	EDF Trading North America, LLC	NWMT-NWMT	COLSTRIP-NWMT.SYSTEM	NF	Montana OATT	COLSTRIP	NWMT.SYSTEM	0	10	10	0	60	0	60
73	EDF Trading North America, LLC	NWMT-NWMT	NWMTIMBALANC-NWMT.SYSTEM	NF	Montana OATT	NWMTIMBALANC	NWMT.SYSTEM	0	2	2	0	12	0	12
74	EDF Trading North America, LLC	NWMT-PPW	COLSTRIP-BRDY	NF	Montana OATT	COLSTRIP	BRDY	0	863	863	0	5,213	0	5,213
75	EDF Trading North America, LLC	NWMT-PPW	COLSTRIP-JEFF	NF	Montana OATT	COLSTRIP	JEFF	0	30	30	0	181	0	181
76	EDF Trading North America, LLC	NWMT-PPW	COLSTRIP-YTP	NF	Montana OATT	COLSTRIP	YTP	0	330	330	0	1,993	0	1,993
77	EDF Trading North America, LLC	NWMT-PPW	COLSTRIP-YTP	SFP	Montana OATT	COLSTRIP	YTP	0	960	960	0	5,800	0	5,800
78	Energy Keepers Inc.	AVA-PPW	AVAT.NWMT-YTP	SFP	Montana OATT	AVAT.NWMT	YTP	0	26,040	26,040	0	157,170	0	157,170
79	Energy Keepers Inc.	NWMT-AVA	KERR-AVAT.NWMT	NF	Montana OATT	KERR	AVAT.NWMT	0	1,912	1,912	0	11,551	0	11,551
80	Energy Keepers Inc.	NWMT-AVA	TFALLS-AVAT.NWMT	NF	Montana OATT	TFALLS	AVAT.NWMT	0	400	400	0	2,416	0	2,416
81	Energy Keepers Inc.	NWMT-BPAT	KERR-BPAT.NWMT	LFP	Montana OATT	KERR	BPAT.NWMT	40	86,360	86,360	527,390	0	0	527,390
82	Energy Keepers Inc.	NWMT-BPAT	KERR-BPAT.NWMT	NF	Montana OATT	KERR	BPAT.NWMT	0	258	258	0	1,558	0	1,558
83	Energy Keepers Inc.	NWMT-PACE	HOLTER-YTP	NF	Montana OATT	HOLTER	YTP	0	200	200	0	1,208	0	1,208
84	Energy Keepers Inc.	NWMT-PACE	KERR-BRDY	LFP	Montana OATT	KERR	BRDY	50	107,950	107,950	659,237	0	0	659,237
85	Energy Keepers Inc.	NWMT-PACE	KERR-BRDY	NF	Montana OATT	KERR	BRDY	0	5,910	5,910	0	35,699	0	35,699
86	Energy Keepers Inc.	NWMT-PACE	KERR-BRDY	SFP	Montana OATT	KERR	BRDY	0	1,080	1,080	0	6,525	0	6,525
87	Energy Keepers Inc.	NWMT-PACE	KERR-JEFF	NF	Montana OATT	KERR	JEFF	0	503	503	0	3,038	0	3,038
88	Energy Keepers Inc.	NWMT-PACE	KERR-YTP	NF	Montana OATT	KERR	YTP	0	975	975	0	5,889	0	5,889
89	Energy Keepers Inc.	NWMT-PACE	KERR-YTP	SFP	Montana OATT	KERR	YTP	0	2,400	2,400	0	14,500	0	14,500
90	Guzman Energy, LLC	AVA-PPW	AVAT.NWMT-YTP	NF	Montana OATT	AVAT.NWMT	YTP	0	667	667	0	4,029	0	4,029
91	Guzman Energy, LLC	BPAT-PPW	BPAT.NWMT-BRDY	NF	Montana OATT	BPAT.NWMT	BRDY	0	360	360	0	2,174	0	2,174
92	Guzman Energy, LLC	BPAT-PPW	BPAT.NWMT-YTP	NF	Montana OATT	BPAT.NWMT	YTP	0	779	779	0	4,705	0	4,705
93	Guzman Energy, LLC	NWMT-PPW	COLSTRIP-BRDY	NF	Montana OATT	COLSTRIP	BRDY	0	227	227	0	1,371	0	1,371
94	Guzman Energy, LLC	NWMT-PPW	COLSTRIP-YTP	NF	Montana OATT	COLSTRIP	YTP	0	308	308	0	1,860	0	1,860
95	Guzman Energy, LLC	PPW-AVA	YTP-AVAT.NWMT	LFP	Montana OATT	YTP	AVAT.NWMT	8	17,272	17,272	105,478	0	0	105,478
96	Guzman Energy, LLC	PPW-WAPA	YTP-CROSSOVER	NF	Montana OATT	YTP	CROSSOVER	0	138	138	0	834	0	834
97	Guzman Energy, LLC	WAPA-AVA	CROSSOVER-AVAT.NWMT	NF	Montana OATT	CROSSOVER	AVAT.NWMT	0	50	50	0	302	0	302
98	Guzman Energy, LLC	WAPA-PPW	CROSSOVER-YTP	NF	Montana OATT	CROSSOVER	YTP	0	180	180	0	1,087	0	1,087
99	Idaho Power Company	AVA-PPW	AVAT.NWMT-JEFF	LFP	Montana OATT	AVAT.NWMT	JEFF	50	107,900	107,900	659,237	0	0	659,237
100	Macquarie Energy, LLC	AVA-PPW	AVAT.NWMT-BRDY	NF	Montana OATT	AVAT.NWMT	BRDY	0	400	400	0	2,416	0	2,416
101	Macquarie Energy, LLC	AVA-PPW	AVAT.NWMT-JEFF	NF	Montana OATT	AVAT.NWMT	JEFF	0	150	150	0	906	0	906
102	Macquarie Energy, LLC	AVA-PPW	AVAT.NWMT-YTP	SFP	Montana OATT	AVAT.NWMT	YTP	0	16,800	16,800	0	101,500	0	101,500
103	Macquarie Energy, LLC	NWMT-AVA	MATL.NWMT-AVAT.NWMT	NF	Montana OATT	MATL.NWMT	AVAT.NWMT	0	6,838	6,838	0	41,307	0	41,307
104	Macquarie Energy, LLC	NWMT-AVA	TFALLS-AVAT.NWMT	NF	Montana OATT	TFALLS	AVAT.NWMT	0	50	50	0	302	0	302
105	Macquarie Energy, LLC	NWMT-BPAT	MATL.NWMT-BPAT.NWMT	NF	Montana OATT	MATL.NWMT	BPAT.NWMT	0	1,513	1,513	0	9,139	0	9,139
106	Macquarie Energy, LLC	NWMT-PACE	MATL.NWMT-BRDY	NF	Montana OATT	MATL.NWMT	BRDY	0	1,539	1,539	0	9,296	0	9,296
107	Macquarie Energy, LLC	NWMT-PACE	MATL.NWMT-YTP	NF	Montana OATT	MATL.NWMT	YTP	0	11,264	11,264	0	68,017	0	68,017
108	Macquarie Energy, LLC	NWMT-PACE	MATL.NWMT-YTP	SFP	Montana OATT	MATL.NWMT	YTP	0	3,744	3,744	0	22,620	0	22,620
109	Macquarie Energy, LLC	NWMT-PACE	TFALLS-JEFF	NF	Montana OATT	TFALLS	JEFF	0	21	21	0	127	0	127
110	Macquarie Energy, LLC	NWMT-PPW	COLSTRIP-YTP	NF	Montana OATT	COLSTRIP	YTP	0	320	320	0	1,933	0	1,933
111	Macquarie Energy, LLC	NWMT-PPW	COLSTRIP-YTP	SFP	Montana OATT	COLSTRIP	YTP	0	600	600	0	3,625	0	3,625
112	Macquarie Energy, LLC	WAUW-NWMT	CROSSOVER-MATL.NWMT	NF	Montana OATT	CROSSOVER	MATL.NWMT	0	192	192	0	1,160	0	1,160
113	MAG Energy Solutions	BPAT-NWMT	BPAT.NWMT-MATL.NWMT	NF	Montana OATT	BPAT.NWMT	MATL.NWMT	0	25	25	0	151	0	151
114	MAG Energy Solutions	BPAT-NWMT	BPAT.NWMT-NWMT.SYSTEM	NF	Montana OATT	BPAT.NWMT	NWMT.SYSTEM	0	225	225	0	1,359	0	1,359
115	MAG Energy Solutions	BPAT-PPW	BPAT.NWMT-BRDY	NF	Montana OATT	BPAT.NWMT	BRDY	0	416	416	0	2,513	0	2,513
116	MAG Energy Solutions	BPAT-PPW	BPAT.NWMT-JEFF	NF	Montana OATT	BPAT.NWMT	JEFF	0	160	160	0	966	0	966
117	MAG Energy Solutions	BPAT-PPW	BPAT.NWMT-YTP	NF	Montana OATT	BPAT.NWMT	YTP	0	31	31	0	187	0	187
118	MAG Energy Solutions	BPAT-PPW	BPAT.NWMT-YTP	SFP	Montana OATT	BPAT.NWMT	YTP	0	664	664	0	3,770	0	3,770
119	MAG Energy Solutions	BPAT-WAPA	BPAT.NWMT-CROSSOVER	NF	Montana OATT	BPAT.NWMT	CROSSOVER	0	7,371	7,371	0	44,525	0	44,525
120	MAG Energy Solutions	BPAT-WAPA	BPAT.NWMT-CROSSOVER	SFP	Montana OATT	BPAT.NWMT	CROSSOVER	0	1,104	1,104	0	6,670	0	6,670
121	MAG Energy Solutions	NWMT-BPAT	MATL.NWMT-BPAT.NWMT	NF	Montana OATT	MATL.NWMT	BPAT.NWMT	0	2,227	2,227	0	13,453	0	13,453
122	MAG Energy Solutions	NWMT-PACE	MATL.NWMT-JEFF	NF	Montana OATT	MATL.NWMT	JEFF	0	250	250	0	1,510	0	1,510
123	MAG Energy Solutions	NWMT-PACE	MATL.NWMT-YTP	NF	Montana OATT	MATL.NWMT	YTP	0	855	855	0	5,164	0	5,164
124	MAG Energy Solutions	NWMT-WAUW	MATL.NWMT-CROSSOVER	NF	Montana OATT	MATL.NWMT	CROSSOVER	0	2,685	2,685	0	16,217	0	16,217
125	MAG Energy Solutions	PPW-WAPA	BRDY-CROSSOVER	NF	Montana OATT	BRDY	CROSSOVER	0	256	256	0	1,546	0	1,546
126	MAG Energy Solutions	PPW-WAPA	YTP-CROSSOVER	NF	Montana OATT	YTP	CROSSOVER	0	200	200	0	1,208	0	1,208
127	MAG Energy Solutions	WAPA-BPAT	CROSSOVER-BPAT.NWMT	NF	Montana OATT	CROSSOVER	BPAT.NWMT	0	939	939	0	5,672	0	5,672
128	MAG Energy Solutions	WAPA-PPW	CROSSOVER-BRDY	NF	Montana OATT	CROSSOVER	BRDY	0	406	406	0	2,452	0	2,452
129	MAG Energy Solutions	WAPA-PPW	CROSSOVER-YTP	NF	Montana OATT	CROSSOVER	YTP	0	15	15	0	91	0	91
130	MAG Energy Solutions	WAUW-NWMT	CROSSOVER-MATL.NWMT	NF	Montana OATT	CROSSOVER	MATL.NWMT	0	1,499	1,499	0	9,054	0	9,054
131	Mercuria Energy America, LLC	BPAT-NWMT	BPAT.NWMT-BROADVIEW	NF	Montana OATT	BPAT.NWMT	BROADVIEW	0	672	672	0	4,059	0	4,059
132	Mercuria Energy America, LLC	BPAT-NWMT	BPAT.NWMT-COLSTRIP	NF	Montana OATT	BPAT.NWMT	COLSTRIP	0	23	23	0	139	0	139
133	Mercuria Energy America, LLC	NWMT-AVA	BROADVIEW-AVAT.NWMT	NF	Montana OATT	BROADVIEW	AVAT.NWMT	0	73	73	0	441	0	441
134	Mercuria Energy America, LLC	NWMT-BPAT	BROADVIEW-BPAT.NWMT	NF	Montana OATT	BROADVIEW	BPAT.NWMT	0	1,018	1,018	0	6,149	0	6,149
135	Mercuria Energy America, LLC	NWMT-NWMT	COLSTRIP-COLSTRIP	NF	Montana OATT	COLSTRIP	COLSTRIP	0	22	22	0	133	0	133
136	Mercuria Energy America, LLC	NWMT-NWMT	COLSTRIP-COLSTRIP	SFP	Montana OATT	COLSTRIP	COLSTRIP	0	2,136	2,136	0	12,905	0	12,905
137	Mercuria Energy America, LLC	NWMT-PPW	BROADVIEW-BRDY	NF	Montana OATT	BROADVIEW	BRDY	0	20	20	0	121	0	121
138	Mercuria Energy America, LLC	NWMT-PPW	BROADVIEW-YTP	SFP	Montana OATT	BROADVIEW	YTP	0	18,600	18,600	0	109,875	0	109,875
139	Mercuria Energy America, LLC	NWMT-WAUW	BROADVIEW-GREATFALLS	NF	Montana OATT	BROADVIEW	GREATFALLS	0	11,799	11,799	0	71,286	0	71,286
140	Mercuria Energy America, LLC	NWMT-WAUW	BROADVIEW-GREATFALLS	SFP	Montana OATT	BROADVIEW	GREATFALLS	0	17,400	17,400	0	105,075	0	105,075
141	Mercuria Energy America, LLC	NWMT-WAUW	JUDITHGAP-GREATFALLS	NF	Montana OATT	JUDITHGAP	GREATFALLS	0	1,200	1,200	0	7,250	0	7,250
142	Mercuria Energy America, LLC	NWMT-WAUW	KERR-GREATFALLS	NF	Montana OATT	KERR	GREATFALLS	0	3,920	3,920	0	23,683	0	23,683
143	Mercuria Energy America, LLC	NWMT-WAUW	MATL.NWMT-GREATFALLS	NF	Montana OATT	MATL.NWMT	GREATFALLS	0	481	481	0	2,906	0	2,906
144	Mercuria Energy America, LLC	NWMT-WAUW	TFALLS-GREATFALLS	NF	Montana OATT	TFALLS	GREATFALLS	0	600	600	0	3,625	0	3,625
145	MFT Energy US Power LLC	BPAT-NWMT	BPAT.NWMT-MATL.NWMT	NF	Montana OATT	BPAT.NWMT	MATL.NWMT	0	2,630	2,630	0	15,885	0	15,885
146	MFT Energy US Power LLC	PACE-NWMT	BRDY-MATL.NWMT	NF	Montana OATT	BRDY	MATL.NWMT	0	151	151	0	912	0	912
147	Morgan Stanley Capital Group, Inc.	AVA-NWMT	AVAT.NWMT-MATL.NWMT	NF	Montana OATT	AVAT.NWMT	MATL.NWMT	0	3,525	3,525	0	20,979	0	20,979
148	Morgan Stanley Capital Group, Inc.	BPAT-GWA	BPAT.NWMT-GLWND1	NF	Montana OATT	BPAT.NWMT	GLWND1	0	2,679	2,679	0	16,181	0	16,181
149	Morgan Stanley Capital Group, Inc.	BPAT-GWA	BPAT.NWMT-GLWND2	NF	Montana OATT	BPAT.NWMT	GLWND2	0	1,089	1,089	0	6,578	0	6,578
150	Morgan Stanley Capital Group, Inc.	BPAT-NWMT	BPAT.NWMT-MATL.NWMT	NF	Montana OATT	BPAT.NWMT	MATL.NWMT	0	70,743	70,743	0	427,304	0	427,304
151	Morgan Stanley Capital Group, Inc.	BPAT-NWMT	BPAT.NWMT-MATL.NWMT	SFP	Montana OATT	BPAT.NWMT	MATL.NWMT	0	120	120	0	725	0	725
152	Morgan Stanley Capital Group, Inc.	GWA-AVA	GLWND1-AVAT.NWMT	NF	Montana OATT	GLWND1	AVAT.NWMT	0	2,196	2,196	0	13,264	0	13,264
153	Morgan Stanley Capital Group, Inc.	GWA-AVA	GLWND2-AVAT.NWMT	NF	Montana OATT	GLWND2	AVAT.NWMT	0	210	210	0	1,268	0	1,268
154	Morgan Stanley Capital Group, Inc.	GWA-BPAT	GLWND1-BPAT.NWMT	NF	Montana OATT	GLWND1	BPAT.NWMT	0	61,894	61,894	0	376,020	0	376,020
155	Morgan Stanley Capital Group, Inc.	GWA-BPAT	GLWND2-BPAT.NWMT	NF	Montana OATT	GLWND2	BPAT.NWMT	0	62,084	62,084	0	376,331	0	376,331
156	Morgan Stanley Capital Group, Inc.	GWA-NWMT	GLWND1-MATL.NWMT	NF	Montana OATT	GLWND1	MATL.NWMT	0	1,973	1,973	0	11,917	0	11,917
157	Morgan Stanley Capital Group, Inc.	GWA-NWMT	GLWND2-MATL.NWMT	NF	Montana OATT	GLWND2	MATL.NWMT	0	300	300	0	1,812	0	1,812
158	Morgan Stanley Capital Group, Inc.	GWA-PPW	GLWND1-BRDY	NF	Montana OATT	GLWND1	BRDY	0	63,055	63,055	0	380,951	0	380,951
159	Morgan Stanley Capital Group, Inc.	GWA-PPW	GLWND1-BRDY	SFP	Montana OATT	GLWND1	BRDY	0	10,200	10,200	0	61,625	0	61,625
160	Morgan Stanley Capital Group, Inc.	GWA-PPW	GLWND1-JEFF	NF	Montana OATT	GLWND1	JEFF	0	453	453	0	2,736	0	2,736
161	Morgan Stanley Capital Group, Inc.	GWA-PPW	GLWND2-BRDY	NF	Montana OATT	GLWND2	BRDY	0	10,711	10,711	0	64,709	0	64,709
162	Morgan Stanley Capital Group, Inc.	GWA-PPW	GLWND2-BRDY	SFP	Montana OATT	GLWND2	BRDY	0	1,200	1,200	0	7,250	0	7,250
163	Morgan Stanley Capital Group, Inc.	GWA-PPW	GLWND2-JEFF	NF	Montana OATT	GLWND2	JEFF	0	68	68	0	411	0	411
164	Morgan Stanley Capital Group, Inc.	NWMT-AVA	MATL.NWMT-AVAT.NWMT	NF	Montana OATT	MATL.NWMT	AVAT.NWMT	0	4,803	4,803	0	28,992	0	28,992
165	Morgan Stanley Capital Group, Inc.	NWMT-BPAT	COLSTRIP-BPAT.NWMT	NF	Montana OATT	COLSTRIP	BPAT.NWMT	0	75	75	0	453	0	453
166	Morgan Stanley Capital Group, Inc.	NWMT-BPAT	MATL.NWMT-BPAT.NWMT	NF	Montana OATT	MATL.NWMT	BPAT.NWMT	0	122,557	122,557	0	743,736	0	743,736
167	Morgan Stanley Capital Group, Inc.	NWMT-GWA	MATL.NWMT-GLWND1	NF	Montana OATT	MATL.NWMT	GLWND1	0	1,147	1,147	0	6,928	0	6,928
168	Morgan Stanley Capital Group, Inc.	NWMT-NWMT	BROADVIEW-MATL.NWMT	NF	Montana OATT	BROADVIEW	MATL.NWMT	0	1,432	1,432	0	8,652	0	8,652
169	Morgan Stanley Capital Group, Inc.	NWMT-NWMT	BROADVIEW-MATL.NWMT	SFP	Montana OATT	BROADVIEW	MATL.NWMT	0	168	168	0	1,015	0	1,015
170	Morgan Stanley Capital Group, Inc.	NWMT-NWMT	KERR-MATL.NWMT	NF	Montana OATT	KERR	MATL.NWMT	0	600	600	0	3,625	0	3,625
171	Morgan Stanley Capital Group, Inc.	NWMT-PACE	MATL.NWMT-BRDY	NF	Montana OATT	MATL.NWMT	BRDY	0	54,156	54,156	0	327,330	0	327,330
172	Morgan Stanley Capital Group, Inc.	NWMT-PACE	MATL.NWMT-BRDY	SFP	Montana OATT	MATL.NWMT	BRDY	0	1,200	1,200	0	7,250	0	7,250
173	Morgan Stanley Capital Group, Inc.	NWMT-PACE	MATL.NWMT-JEFF	NF	Montana OATT	MATL.NWMT	JEFF	0	6,653	6,653	0	40,192	0	40,192
174	Morgan Stanley Capital Group, Inc.	NWMT-PACE	MATL.NWMT-JEFF	SFP	Montana OATT	MATL.NWMT	JEFF	0	3,120	3,120	0	18,850	0	18,850
175	Morgan Stanley Capital Group, Inc.	NWMT-PACE	MATL.NWMT-YTP	NF	Montana OATT	MATL.NWMT	YTP	0	156	156	0	942	0	942
176	Morgan Stanley Capital Group, Inc.	WAPA-AVA	GREATFALLS-AVAT.NWMT	NF	Montana OATT	GREATFALLS	AVAT.NWMT	0	2,933	2,933	0	17,715	0	17,715
177	Morgan Stanley Capital Group, Inc.	WAPA-BPAT	GREATFALLS-BPAT.NWMT	NF	Montana OATT	GREATFALLS	BPAT.NWMT	0	6,579	6,579	0	39,737	0	39,737
178	Morgan Stanley Capital Group, Inc.	WAPA-PPW	CROSSOVER-YTP	NF	Montana OATT	CROSSOVER	YTP	0	1,280	1,280	0	7,731	0	7,731
179	Morgan Stanley Capital Group, Inc.	WAPA-PPW	GREATFALLS-BRDY	NF	Montana OATT	GREATFALLS	BRDY	0	2,731	2,731	0	16,495	0	16,495
180	Morgan Stanley Capital Group, Inc.	WAPA-PPW	GREATFALLS-JEFF	NF	Montana OATT	GREATFALLS	JEFF	0	524	524	0	3,165	0	3,165
181	Morgan Stanley Capital Group, Inc.	WAUW-NWMT	GREATFALLS-MATL.NWMT	NF	Montana OATT	GREATFALLS	MATL.NWMT	0	1,394	1,394	0	8,420	0	8,420
182	Naturener Power Watch, LLC	GWA-GWA	GLWND1-GLWND2	SFP	Montana OATT	GLWND1	GLWND2	0	10,795	10,795	0	65,925	0	65,925
183	PacifiCorp	PPW-NWMT	MLCK-JEFF	NF	Montana OATT	MLCK	JEFF	0	6	6	0	36	0	36
184	Phillips 66 Energy Trading, LLC	NWMT-AVA	MATL.NWMT-AVAT.NWMT	SFP	Montana OATT	MATL.NWMT	AVAT.NWMT	0	28	28	0	0	0	0
185	Phillips 66 Energy Trading, LLC	NWMT-PACE	MATL.NWMT-JEFF	SFP	Montana OATT	MATL.NWMT	JEFF	0	64,750	64,750	0	395,550	0	395,550
186	Phillips 66 Energy Trading, LLC	PPW-AVA	BRDY-AVAT.NWMT	LFP	Montana OATT	BRDY	AVAT.NWMT	34	73,406	73,406	448,282	0	0	448,282
187	Portland General Electric Company	BPAT-NWMT	BPAT.NWMT-COLSTRIP	NF	Montana OATT	BPAT.NWMT	COLSTRIP	0	48	48	0	290	0	290
188	Portland General Electric Company	NWMT-BPAT	CLEARWATER-BPAT.NWMT	LFP	Montana OATT	CLEARWATER	BPAT.NWMT	268	578,612	578,612	3,533,513	0	0	3,533,513
189	Portland General Electric Company	NWMT-BPAT	COLSTRIP-BPAT.NWMT	NF	Montana OATT	COLSTRIP	BPAT.NWMT	0	1,572	1,572	0	9,495	0	9,495
190	Portland General Electric Company	NWMT-NWMT	COLSTRIP-NWMT.SYSTEM	NF	Montana OATT	COLSTRIP	NWMT.SYSTEM	0	54	54	0	326	0	326
191	Portland General Electric Company	NWMT-NWMT	COLSTRIP-TOWNSEND	LFP	Montana OATT	COLSTRIP	TOWNSEND	32	69,088	69,088	421,912	0	0	421,912
192	Portland General Electric Company	NWMT-PPW	COLSTRIP-BRDY	NF	Montana OATT	COLSTRIP	BRDY	0	300	300	0	1,812	0	1,812
193	Portland General Electric Company	WAUW-NWMT	CROSSOVER-COLSTRIP	NF	Montana OATT	CROSSOVER	COLSTRIP	0	3	3	0	18	0	18
194	Powerex Corporation	AVA-BPAT	AVAT.NWMT-BPAT.NWMT	NF	Montana OATT	AVAT.NWMT	BPAT.NWMT	0	279	279	0	1,685	0	1,685
195	Powerex Corporation	BPAT-PPW	BPAT.NWMT-BRDY	LFP	Montana OATT	BPAT.NWMT	BRDY	76	164,084	164,084	1,002,041	0	0	1,002,041
196	Powerex Corporation	BPAT-PPW	BPAT.NWMT-YTP	NF	Montana OATT	BPAT.NWMT	YTP	0	9,601	9,601	0	57,994	0	57,994
197	Powerex Corporation	BPAT-WAPA	BPAT.NWMT-CROSSOVER	NF	Montana OATT	BPAT.NWMT	CROSSOVER	0	2,625	2,625	0	15,856	0	15,856
198	Powerex Corporation	BPAT-WAPA	BPAT.NWMT-CROSSOVER	SFP	Montana OATT	BPAT.NWMT	CROSSOVER	0	10,944	10,944	0	66,065	0	66,065
199	Powerex Corporation	PPW-BPAT	YTP-BPAT.NWMT	NF	Montana OATT	YTP	BPAT.NWMT	0	81	81	0	489	0	489
200	Powerex Corporation	WAPA-BPAT	CROSSOVER-BPAT.NWMT	NF	Montana OATT	CROSSOVER	BPAT.NWMT	0	27	27	0	163	0	163
201	Puget Sound Energy Marketing	NWMT-BPAT	BROADVIEW-BPAT.NWMT	NF	Montana OATT	BROADVIEW	BPAT.NWMT	0	1	1	0	6	0	6
202	Puget Sound Energy Marketing	NWMT-BPAT	COLSTRIP-BPAT.NWMT	NF	Montana OATT	COLSTRIP	BPAT.NWMT	0	55	55	0	6	0	6
203	Puget Sound Energy Marketing	NWMT-NWMT	BEAVERCREEK-BROADVIEW	SFP	Montana OATT	BEAVERCREEK	BROADVIEW	0	535,184	535,184	0	3,269,880	0	3,269,880
204	Puget Sound Energy Marketing	NWMT-NWMT	BEAVERCREEK-COLSTRIP	SFP	Montana OATT	BEAVERCREEK	COLSTRIP	0	248	248	0	0	0	0
205	Rainbow Electric Marketing Corp.	BPAT-NWMT	BPAT.NWMT-MATL.NWMT	NF	Montana OATT	BPAT.NWMT	MATL.NWMT	0	1,131	1,131	0	6,831	0	6,831
206	Rainbow Electric Marketing Corp.	BPAT-WAPA	BPAT.NWMT-CROSSOVER	NF	Montana OATT	BPAT.NWMT	CROSSOVER	0	7,767	7,767	0	46,922	0	46,922
207	Rainbow Electric Marketing Corp.	NWMT-WAUW	MATL.NWMT-CROSSOVER	NF	Montana OATT	MATL.NWMT	CROSSOVER	0	542	542	0	3,274	0	3,274
208	Rainbow Electric Marketing Corp.	PPW-WAPA	YTP-CROSSOVER	NF	Montana OATT	YTP	CROSSOVER	0	608	608	0	3,672	0	3,672
209	Shell Energy North America	BPAT-WAPA	BPAT.NWMT-CROSSOVER	NF	Montana OATT	BPAT.NWMT	CROSSOVER	0	1,593	1,593	0	9,622	0	9,622
210	Shell Energy North America	NWMT-BPAT	KERR-BPAT.NWMT	NF	Montana OATT	KERR	BPAT.NWMT	0	100	100	0	604	0	604
211	Shell Energy North America	WAPA-BPAT	CROSSOVER-BPAT.NWMT	NF	Montana OATT	CROSSOVER	BPAT.NWMT	0	7	7	0	42	0	42
212	TEC Energy Inc.	AVA-NWMT	AVAT.NWMT-MATL.NWMT	NF	Montana OATT	AVAT.NWMT	MATL.NWMT	0	550	550	0	3,322	0	3,322
213	TEC Energy Inc.	PPW-WAPA	BRDY-CROSSOVER	NF	Montana OATT	BRDY	CROSSOVER	0	28	28	0	169	0	169
214	The Energy Authority	BPAT-PPW	BPAT.NWMT-YTP	NF	Montana OATT	BPAT.NWMT	YTP	0	802	802	0	4,844	0	4,844
215	The Energy Authority	BPAT-WAPA	BPAT.NWMT-CROSSOVER	NF	Montana OATT	BPAT.NWMT	CROSSOVER	0	2,526	2,526	0	15,257	0	15,257
216	The Energy Authority	NWMT-NWMT	COLSTRIP-COLSTRIP	NF	Montana OATT	COLSTRIP	COLSTRIP	0	96	96	0	580	0	580
217	The Energy Authority	PPW-BPAT	YTP-BPAT.NWMT	NF	Montana OATT	YTP	BPAT.NWMT	0	31	31	0	187	0	187
218	The Energy Authority	PPW-WAPA	BRDY-CROSSOVER	NF	Montana OATT	BRDY	CROSSOVER	0	10	10	0	60	0	60
219	The Energy Authority	WAPA-BPAT	CROSSOVER-BPAT.NWMT	NF	Montana OATT	CROSSOVER	BPAT.NWMT	0	506	506	0	3,056	0	3,056
220	The Energy Authority	WAPA-PPW	CROSSOVER-JEFF	NF	Montana OATT	CROSSOVER	JEFF	0	388	388	0	2,344	0	2,344
221	Transalta Energy Marketing (US) Inc.	BPAT-NWMT	BPAT.NWMT-MATL.NWMT	NF	Montana OATT	BPAT.NWMT	MATL.NWMT	0	2,108	2,108	0	12,732	0	12,732
222	Transalta Energy Marketing (US) Inc.	BPAT-PPW	BPAT.NWMT-YTP	NF	Montana OATT	BPAT.NWMT	YTP	0	1,683	1,683	0	10,165	0	10,165
223	Transalta Energy Marketing (US) Inc.	BPAT-WAPA	BPAT.NWMT-CROSSOVER	NF	Montana OATT	BPAT.NWMT	CROSSOVER	0	13,681	13,681	0	82,641	0	82,641
224	Transalta Energy Marketing (US) Inc.	BPAT-WAPA	BPAT.NWMT-CROSSOVER	SFP	Montana OATT	BPAT.NWMT	CROSSOVER	0	8,280	8,280	0	50,025	0	50,025
225	Transalta Energy Marketing (US) Inc.	NWMT-BPAT	MATL.NWMT-BPAT.NWMT	NF	Montana OATT	MATL.NWMT	BPAT.NWMT	0	3,976	3,976	0	24,017	0	24,017
226	Transalta Energy Marketing (US) Inc.	NWMT-PACE	MATL.NWMT-YTP	NF	Montana OATT	MATL.NWMT	YTP	0	211	211	0	1,274	0	1,274
227	Transalta Energy Marketing (US) Inc.	NWMT-WAUW	MATL.NWMT-CROSSOVER	NF	Montana OATT	MATL.NWMT	CROSSOVER	0	5,065	5,065	0	30,593	0	30,593
228	Transalta Energy Marketing (US) Inc.	PPW-BPAT	YTP-BPAT.NWMT	NF	Montana OATT	YTP	BPAT.NWMT	0	25	25	0	151	0	151
229	Transalta Energy Marketing (US) Inc.	WAPA-BPAT	CROSSOVER-BPAT.NWMT	NF	Montana OATT	CROSSOVER	BPAT.NWMT	0	314	314	0	1,897	0	1,897
230	Transalta Energy Marketing (US) Inc.	WAUW-NWMT	CROSSOVER-MATL.NWMT	NF	Montana OATT	CROSSOVER	MATL.NWMT	0	135	135	0	815	0	815
231	Western Area Power Administration	NWMT-WAPA	CANYONFERRY-CROSSOVER	NF	Montana OATT	CANYONFERRY	CROSSOVER	0	75	75	0	453	0	453
232	Western Area Power Administration	NWMT-WAPA	CANYONFERRY-CROSSOVER	SFP	Montana OATT	CANYONFERRY	CROSSOVER	0	31,100	31,100	0	185,950	0	185,950
233	Western Area Power Administration	NWMT-WAPA	CANYONFERRY-GREATFALLS	NF	Montana OATT	CANYONFERRY	GREATFALLS	0	15	15	0	91	0	91
234	Western Area Power Administration	NWMT-WAPA	CANYONFERRY-GREATFALLS	SFP	Montana OATT	CANYONFERRY	GREATFALLS	0	44,170	44,170	0	274,520	0	274,520
235	Western Area Power Administration	PPW-WAPA	YTP-CROSSOVER	SFP	Montana OATT	YTP	CROSSOVER	0	87,844	87,844	0	536,190	0	536,190
236	Western Area Power Administration	WAPA-PPW	CROSSOVER-YTP	NF	Montana OATT	CROSSOVER	YTP	0	1,897	1,897	0	11,458	0	11,458
237	Western Area Power Administration	WAPA-PPW	CROSSOVER-YTP	SFP	Montana OATT	CROSSOVER	YTP	0	59,480	59,480	0	351,600	0	351,600
238	Western Area Power Administration	WAPA-WAPA	CROSSOVER-GREATFALLS	LFP	Montana OATT	CROSSOVER	GREATFALLS	10	21,590	21,590	131,848	0	0	131,848
239	Western Area Power Administration	WAPA-WAPA	CROSSOVER-GREATFALLS	NF	Montana OATT	CROSSOVER	GREATFALLS	0	15	15	0	91	0	91
240	Western Area Power Administration	WAPA-WAPA	GREATFALLS-CROSSOVER	LFP	Montana OATT	GREATFALLS	CROSSOVER	20	43,180	43,180	263,695	0	0	263,695
241	Western Area Power Administration	WAUW-NWMT	GREATFALLS-GTFALLSNWMT	SFP	Montana OATT	GREATFALLS	GTFALLSNWMT	0	4,318	4,318	0	26,370	0	26,370
242	Rounding								1	1	1	1		2
35	TOTAL							1,614	4,369,410	4,369,410	17,402,978	9,998,765	0	27,401,743

TRANSMISSION OF ELECTRICITY BY OTHERS (Account 565)
Report all transmission, i.e. wheeling or electricity provided by other electric utilities, cooperatives, municipalities, other public authorities, qualifying facilities, and others for the quarter. In column (a) report each company or public authority that provided transmission service. Provide the full name of the company, abbreviate if necessary, but do not truncate name or use acronyms. Explain in a footnote any ownership interest in or affiliation with the transmission service provider. Use additional columns as necessary to report all companies or public authorities that provided transmission service for the quarter reported. In column (b) enter a Statistical Classification code based on the original contractual terms and conditions of the service as follows: FNS - Firm Network Transmission Service for Self, LFP - Long-Term Firm Point-to-Point Transmission Reservations. OLF - Other Long-Term Firm Transmission Service, SFP - Short-Term Firm Point-to- Point Transmission Reservations, NF - Non-Firm Transmission Service, and OS - Other Transmission Service. See General Instructions for definitions of statistical classifications. Report in column (c) and (d) the total megawatt hours received and delivered by the provider of the transmission service. Report in column (e), (f) and (g) expenses as shown on bills or vouchers rendered to the respondent. In column (e) report the demand charges and in column (f) energy charges related to the amount of energy transferred. On column (g) report the total of all other charges on bills or vouchers rendered to the respondent, including any out of period adjustments. Explain in a footnote all components of the amount shown in column (g). Report in column (h) the total charge shown on bills rendered to the respondent. If no monetary settlement was made, enter zero in column (h). Provide a footnote explaining the nature of the non-monetary settlement, including the amount and type of energy or service rendered. Enter ""TOTAL"" in column (a) as the last line. Footnote entries and provide explanations following all required data.
			TRANSFER OF ENERGY		EXPENSES FOR TRANSMISSION OF ELECTRICITY BY OTHERS
Line No.	NameOfCompanyOrPublicAuthorityTransmissionOfElectricityByOthers Name of Company or Public Authority (Footnote Affiliations) (a)	StatisticalClassificationCode Statistical Classification (b)	TransmissionOfElectricityByOthersEnergyReceived MegaWatt Hours Received (c)	TransmissionOfElectricityByOthersEnergyDelivered MegaWatt Hours Delivered (d)	DemandChargesTransmissionOfElectricityByOthers Demand Charges ($) (e)	EnergyChargesTransmissionOfElectricityByOthers Energy Charges ($) (f)	OtherChargesTransmissionOfElectricityByOthers Other Charges ($) (g)	ChargesForTransmissionOfElectricityByOthers Total Cost of Transmission ($) (h)
1	Vigilante Elec Coop	OLF	6,061	6,061	12,600			12,600
2	Bonneville Power Administration	OLF					(a) 825,852	825,852
3	Sun River Elect Coop	OLF	4,002	4,002	22,013			22,013
4	Southwest Power Pool	FNS	26,751	26,751	286,602			286,602
5	Glacier Electric Coop	OLF	3,890	3,890	12,292			12,292
6	Supply
7	Bonneville Power Administration	NF	108,721	108,721		393,500		393,500
8	Shell Energy North America	NF	2,585	2,585		6,616		6,616
9	Idaho Power Company	NF	100	100		908		908
10	Seattle City Light	NF	1,657	1,657		2,900		2,900
	TOTAL		153,767	153,767	333,507	403,924	825,852	1,563,283

Deprec, Depl and Amort of Elec Plant (403,403.1,404,and 405) (except Amortization of Acquisition Adjustments)
Report the year to date amounts of depreciation expense, asset retirement cost depreciation, depletion and amortization, except amortization of acquisition adjustments for the accounts indicated and classified according to the plant functional groups described.
Line No.	FunctionalClassificationAxis Functional Classification (a)	DepreciationExpenseExcludingAmortizationOfAcquisitionAdjustments Depreciation Expense (Account 403) (b)	DepreciationExpenseForAssetRetirementCostsExcludingAmortizationgOfAcquisitionAdjustments Depreciation Expense for Asset Retirement Costs (Account 403.1) (c)	AmortizationOfLimitedTermPlantOrProperty Amortization of Limited Term Electric Plant (Account 404) (d)	AmortizationOfOtherElectricPlant Amortization of Other Electric Plant (Acc 405) (e)	DepreciationAndAmortization Total (f)
1	Intangible Plant			94,250		94,250
2	Steam Production Plant	1,435,383				1,435,383
3	Nuclear Production Plant
4	Hydraulic Production Plant-Conventional	4,069,757		36,657		4,106,414
5	Hydraulic Production Plant-Pumped Storage
5.1	Solar Production Plant	31,918				31,918
5.2	Wind Production Plant	1,201,761		509		1,202,270
5.3	Other Renewable Production Plant
6	Other Production Plant	4,465,662		2,499		4,468,161
7	Transmission Plant	9,209,923		526,187		9,736,110
8	Distribution Plant	15,972,885		408,106		16,380,991
9	General Plant	715,784		13,525		729,309
9.1	Energy Storage Plant	153,603				153,603
10	Common Plant-Electric	1,338,126		1,511,602		2,849,728
11	TOTAL	38,594,802		2,593,335		41,188,137

Monthly Peak Loads and Energy Output
Report the monthly peak load and energy output. If the respondent has two or more power which are not physically integrated, furnish the required information for each non- integrated system. Report in column (b) by month the system’s output in Megawatt hours for each month. Report in column (c) by month the non-requirements sales for resale. Include in the monthly amounts any energy losses associated with the sales. Report in column (d) by month the system’s monthly maximum megawatt load (60 minute integration) associated with the system. Report in column (e) and (f) the specified information for each monthly peak load reported in column (d).
Line No.	MonthAxis Month (a)	Total Monthly Energy (MWH) (b)	Monthly Non-Requirements Sales for Resale & Associated Losses (c)	MonthlyPeakLoad Monthly Peak Megawatts (See Instr. 4) (d)	DayOfMonthlyPeak Monthly Peak Day of Month (e)	HourOfMonthlyPeak Monthly Peak Hour (f)
	NAME OF SYSTEM: Montana Operations
1	January	860,891	26,052	2,716	23	10
2	February	723,496	116,700	2,705	18	19
3	March	672,014	104,039	2,418	16	9
4	Total for Quarter 1	2,256,401	246,791
5	April
6	May
7	June
8	Total for Quarter 2
9	July
10	August
11	September
12	Total for Quarter 3
41	Total	2,256,401	246,791

MONTHLY TRANSMISSION SYSTEM PEAK LOAD
Report the monthly peak load on the respondent's transmission system. If the respondent has two or more power systems which are not physically integrated, furnish the required information for each non-integrated system. Report on Column (b) by month the transmission system's peak load. Report on Columns (c ) and (d) the specified information for each monthly transmission - system peak load reported on Column (b). Report on Columns (e) through (j) by month the system' monthly maximum megawatt load by statistical classifications. See General Instruction for the definition of each statistical classification.
Line No.	Month (a)	Monthly Peak MW - Total (b)	Day of Monthly Peak (c)	Hour of Monthly Peak (d)	Firm Network Service for Self (e)	Firm Network Service for Others (f)	Long-Term Firm Point-to-point Reservations (g)	Other Long-Term Firm Service (h)	Short-Term Firm Point-to-point Reservation (i)	Other Service (j)
	NAME OF SYSTEM: Montana Operations
1	January	1,866	23	10	1,016	676	850	0	1,516	0
2	February	1,855	18	19	1,007	671	850	0	1,204	0
3	March	1,568	16	9	1,001	593	850	0	1,332	0
4	Total for Quarter 1				3,024	1,940	2,550	0	4,052	0
5	April
6	May
7	June
8	Total for Quarter 2
9	July
10	August
11	September
12	Total for Quarter 3
13	October
14	November
15	December
16	Total for Quarter 4
17	Total				3,024	1,940	2,550	0	4,052	0

Monthly ISO/RTO Transmission System Peak Load
Report the monthly peak load on the respondent's transmission system. If the Respondent has two or more power systems which are not physically integrated, furnish the required information for each non-integrated system. Report on Column (b) by month the transmission system's peak load. Report on Column (c) and (d) the specified information for each monthly transmission - system peak load reported on Column (b). Report on Columns (e) through (i) by month the system’s transmission usage by classification. Amounts reported as Through and Out Service in Column (g) are to be excluded from those amounts reported in Columns (e) and (f). Amounts reported in Column (j) for Total Usage is the sum of Columns (h) and (i).
Line No.	Month (a)	Monthly Peak MW - Total (b)	Day of Monthly Peak (c)	Hour of Monthly Peak (d)	Import into ISO/RTO (e)	Exports from ISO/RTO (f)	Through and Out Service (g)	Network Service Usage (h)	Point-to-Point Service Usage (i)	Total Usage (j)
	NAME OF SYSTEM: Enter System
1	January
2	February
3	March
4	Total for Quarter 1
5	April
6	May
7	June
8	Total for Quarter 2
9	July
10	August
11	September
12	Total for Quarter 3
13	October
14	November
15	December
16	Total for Quarter 4
17	Total Year to Date/Year




FERC FINANCIAL REPORT FERC FORM No. 1: Annual Report of Major Electric Utilities, Licensees and Others and Supplemental Form 3-Q: Quarterly Financial Report

These reports are mandatory under the Federal Power Act, Sections 3, 4(a), 304 and 309, and 18 CFR 141.1 and 141.400. Failure to report may result in criminal fines, civil penalties and other sanctions as provided by law. The Federal Energy Regulatory Commission does not consider these reports to be of confidential nature

TRANSMISSION OF ELECTRICITY BY ISO/RTOs
Report in Column (a) the Transmission Owner receiving revenue for the transmission of electricity by the ISO/RTO. Use a separate line of data for each distinct type of transmission service involving the entities listed in Column (a). In Column (b) enter a Statistical Classification code based on the original contractual terms and conditions of the service as follows: FNO – Firm Network Service for Others, FNS – Firm Network Transmission Service for Self, LFP – Long-Term Firm Point-to-Point Transmission Service, OLF – Other Long-Term Firm Transmission Service, SFP – Short-Term Firm Point-to-Point Transmission Reservation, NF – Non-Firm Transmission Service, OS – Other Transmission Service and AD- Out-of-Period Adjustments. Use this code for any accounting adjustments or “true-ups” for service provided in prior reporting periods. Provide an explanation in a footnote for each adjustment. See General Instruction for definitions of codes. In column (c) identify the FERC Rate Schedule or tariff Number, on separate lines, list all FERC rate schedules or contract designations under which service, as identified in column (b) was provided. In column (d) report the revenue amounts as shown on bills or vouchers. Report in column (e) the total revenues distributed to the entity listed in column (a).
Line No.	Payment Received by (Transmission Owner Name) (a)	Statistical Classification (b)	FERC Rate Schedule or Tariff Number (c)	Total Revenue by Rate Schedule or Tariff (d)	Total Revenue (e)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
40	TOTAL

AMOUNTS INCLUDED IN ISO/RTO SETTLEMENT STATEMENTS
The respondent shall report below the details called for concerning amounts it recorded in Account 555, Purchase Power, and Account 447, Sales for Resale, for items shown on ISO/RTO Settlement Statements. Transactions should be separately netted for each ISO/RTO administered energy market for purposes of determining whether an entity is a net seller or purchaser in a given hour. Net megawatt hours are to be used as the basis for determining whether a net purchase or sale has occurred. In each monthly reporting period, the hourly sale and purchase net amounts are to be aggregated and separately reported in Account 447, Sales for Resale, or Account 555, Purchase Power, respectively.
Line No.	Description of Item(s) (a)	Balance at End of Quarter 1 (b)	Balance at End of Quarter 2 (c)	Balance at End of Quarter 3 (d)	Balance at End of Year (e)
1	Energy
2	Net Purchases (Account 555)
2.1	Net Purchases (Account 555.1)
3	Net Sales (Account 447)
4	Transmission Rights
5	Ancillary Services
6	Other Items (list separately)
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46	TOTAL

FERC FINANCIAL REPORT FERC FORM No. 1: Annual Report of Major Electric Utilities, Licensees and Others and Supplemental Form 3-Q: Quarterly Financial Report

INSTRUCTIONS FOR FILING FERC FORM NOS. 1 and 3-Q

GENERAL INFORMATION

Purpose

Who Must Submit

What and Where to Submit

When to Submit

Where to Send Comments on Public Reporting Burden.

GENERAL INSTRUCTIONS

EXCERPTS FROM THE LAW

GENERAL PENALTIES

FERC FINANCIAL REPORT
FERC FORM No. 1: Annual Report of
Major Electric Utilities, Licensees
and Others and Supplemental
Form 3-Q: Quarterly Financial Report