PUBLIC SERVICE CO OF NEW MEXICO

(1)Significant Accounting Policies and Responsibility for Financial Statements

Financial Statement Preparation

In the opinion of management, the accompanying unaudited interim Condensed Consolidated Financial Statements reflect all normal and recurring accruals and adjustments that are necessary to present fairly the consolidated financial position at September 30, 2025 and December 31, 2024, and the consolidated results of operations, comprehensive income, and cash flows for the nine months ended September 30, 2025 and 2024. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could ultimately differ from those estimated. Weather causes the Company’s results of operations to be seasonal in nature and the results of operations presented in the accompanying Condensed Consolidated Financial Statements are not necessarily representative of operations for an entire year.

On August 2, 2024, PNM Resources, Inc. (“PNMR”) amended its Articles of Incorporation to change its name to TXNM Energy, Inc. (“TXNM”) and increase the number of authorized shares of the Company’s common stock from 120,000,000 to 200,000,000. The Notes to Condensed Consolidated Financial Statements include disclosures for TXNM, PNM, and TNMP. This report uses the term “Company” when discussing matters of common applicability to TXNM, PNM, and TNMP. Discussions regarding only TXNM, PNM, or TNMP are so indicated.

On May 18, 2025, TXNM, Parent, and Merger Sub, entered into the Merger Agreement, pursuant to which Merger Sub will merge with and into TXNM, with TXNM surviving the Merger as a direct, wholly-owned subsidiary of Parent. Parent and Merger Sub are affiliates of Blackstone Infrastructure. See Note 17.

These Condensed Consolidated Financial Statements are unaudited. Certain information and note disclosures normally included in the annual audited Consolidated Financial Statements have been condensed or omitted, as permitted under the applicable rules and regulations. Readers of these financial statements should refer to TXNM’s, PNM’s, and TNMP’s audited Consolidated Financial Statements and Notes thereto that are included in their respective 2024 Annual Reports on Form 10-K.

GAAP defines subsequent events as events or transactions that occur after the balance sheet date but before financial statements are issued or are available to be issued. Based on their nature, magnitude, and timing, certain subsequent events may be required to be reflected at the balance sheet date and/or required to be disclosed in the financial statements. The Company has evaluated subsequent events accordingly.

Principles of Consolidation

The Condensed Consolidated Financial Statements of each of TXNM, PNM, and TNMP include their accounts and those of subsidiaries in which that entity owns a majority voting interest. PNM also consolidates Valencia and ETBC I. See Note 6. PNM owns undivided interests in several jointly-owned power plants and records its pro-rata share of the assets, liabilities, and expenses for those plants. The agreements for the jointly-owned plants provide that if an owner were to default on its payment obligations, the non-defaulting owners would be responsible for their proportionate share of the obligations of the defaulting owner. In exchange, the non-defaulting owners would be entitled to their proportionate share of the generating capacity of the defaulting owner. There have beenno such payment defaults under any of the agreements for the jointly-owned plants.

PNMR Services Company expenses, which represent costs that are primarily driven by corporate level activities, are charged to the business segments. These services are billed at cost and are reflected as general and administrative expenses in the business segments. Other significant intercompany transactions between TXNM, PNM, and TNMP include interest and income tax sharing payments, as well as equity transactions. See Note 15. All intercompany transactions and balances have been eliminated.

Equity Method Investment (Previously held)

As discussed in Note 21 of the Company’s 2024 Annual Reports on Form 10-K, PNMR Development and AEP OnSite Partners created NMRD in September 2017 to pursue the acquisition, development, and ownership of renewable energy generation projects, primarily in the state of New Mexico. On February 27, 2024, PNMR Development and AEP OnSite Partners sold their respective interests in NMRD. PNMR Development received net proceeds of $117.0 million and recognized an after-tax gain of $4.4 million, which was presented as cash flows from operating activities on the Condensed Consolidated Statement of Cash Flows in the nine months ended September 30, 2024. The recognition of deferred investment tax credits of

$15.7 million was also recognized as an income tax benefit on the Condensed Consolidated Statement of Earnings. In the nine months ended September 30, 2024, PNMR Development and AEP OnSite Partners each made cash contributions to NMRD of $12.6 million.

Dividends on Common Stock

Dividends on TXNM’s common stock are declared by the Board. The timing of the declaration of dividends is dependent on the timing of meetings and other actions of the Board. The Board declared dividends on common stock attributable to the second quarter of $0.4075 per share in July 2025 and $0.3875 per share in July 2024, which are reflected as being in the second quarter within the Dividends Declared per Common Share on the TXNM Condensed Consolidated Statement of Earnings. The Board declared dividends on common stock for the third quarter of $0.4075 per share in September 2025 and $0.3875 per share in September 2024, which are reflected as being in the third quarter within the Dividends Declared per Common Share on the TXNM Condensed Consolidated Statement of Earnings.

TXNM made zero and $250.0 million in cash equity contributions to TNMP in the three and nine months ended September 30, 2025. TXNM didnot make any cash equity contributions to TNMP in the three and nine months ended September 30, 2024. TXNM didnot make any cash equity contributions to PNM in the three and nine months ended September 30, 2025. TXNM made zero and $55.0 million in cash equity contributions to PNM in the three and nine months ended September 30, 2024. Neither PNMnor TNMP declared or paid any cash dividends on their common stock to TXNM in the three and nine months ended September 30, 2025 and 2024.

New Accounting Pronouncements

Information concerning recently issued accounting pronouncements that have not yet been adopted by the Company is presented below. The Company does not expect difficulty in adopting these standards by their required effective dates.

Accounting Standards Update 2023-09 - Income Taxes (Topic 740): Improvements to Income Tax Disclosures

In December 2023, the FASB issued ASU 2023-09 enhancing the transparency and decision usefulness of income tax disclosures. Disclosure requirements of this update include (on an annual basis) the disclosure of specific categories in the rate reconciliation and the inclusion of additional information for reconciling items that meet a quantitative threshold (if the effect of the reconciling item is equal to or greater than 5 percent of the amount computed by multiplying pre-tax income by the applicable statutory rate). The amendment also requires the disclosure (on an annual basis) of information about income taxes paid (net of refunds) including the disaggregation by federal, state, and foreign taxes as well as by individual jurisdiction. Additional requirements include the disclosure of income (loss) from continuing operations before income tax expense (benefit) disaggregated between foreign and domestic as well as income tax expense (benefit) from continuing operations disaggregated by federal, state, and foreign. ASU 2023-09 is effective for the Company for the annual reporting period beginning after December 15, 2024, with early adoption being permitted. ASU 2023-09 is to be applied on a prospective basis with retrospective application permitted. The Company expects to adopt the disclosure requirements of ASU 2023-09 with its Annual Report on Form 10-K for the year ended December 31, 2025.

Accounting Standards Update 2024-03 - Income Statement (Subtopic 220-40): Reporting Comprehensive Income - Expense Disaggregation Disclosures

In November 2024, the FASB issued ASU 2024-03 that will require disclosure, in the notes to the financial statements, of specified information about certain costs and expenses at each interim and annual period. Disclosures should include amounts for purchases of inventory, employee compensation, depreciation, and intangible asset amortization; certain amounts that are already required to be disclosed under GAAP in the same disclosure as other disaggregation requirements; qualitative descriptions of the amounts remaining in relevant expense categories that are not disaggregated; and the total amount of selling expenses including the entity’s definition of selling expenses. In January 2025, ASU 2025-01 was issued to clarify that the amendments of ASU 2024-03 are effective for public business entities for annual reporting periods beginning after December 15, 2026 and interim reporting periods beginning after December 15, 2027. The Company expects to adopt the disclosure requirements of ASU 2024-03 with its Annual Report on Form 10-K for the year ended December 31, 2027.

Accounting Standards Update 2025-05– Financial Instruments– Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets

In July 2025, the FASB issued ASU 2025-05 that introduces a practical expedient for all entities and an accounting policy election for entities other than public business entities, related to applying Subtopic 326-20 to current accounts receivable and current contract assets arising from transactions accounted for under Topic 606. In developing a reasonable and supportable forecast as a part of estimating expected credit losses, all entities may elect a practical expedient that assumes that current conditions as of the balance sheet date do not change for the remaining life of the asset. Entities other than public business entities that elect the practical expedient are permitted to make an accounting policy election to consider collection activity after the balance sheet date when estimating expected credit losses. An entity that elects the practical expedient and the accounting policy election, if applicable, should apply the amendments in this update prospectively. The amendments in this update are effective for all entities for annual reporting periods beginning after December 15, 2025 and interim reporting periods within those annual reporting periods. Early adoption is permitted. The Company has not yet determined whether it will elect the practical expedient for estimating credit losses, however, it does not expect that this will have a material impact on its current allowance for expected credit losses.

Accounting Standards Update 2025-06– Intangibles– Goodwill and Other– Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software

In September 2025, the FASB issued ASU 2025-06 that updates the internal-use software guidance in subtopic 350-40 including the removal of all references to prescriptive and sequential developmental stages referred to as “project stages” throughout the subtopic. The new guidance requires an entity to start capitalizing software costs when management has authorized and committed to funding the project and it is probable that the project will be completed and used to perform the function it was intended for (referred to as the “probable-to-complete recognition threshold”). During the evaluation of the probable-to-complete recognition threshold, the entity is required to consider whether there is significant uncertainty associated with the development activities of the software. The amendments in this update are effective for all entities for annual reporting periods beginning after December 15, 2027 and interim reporting periods within those annual reporting periods. Early adoption is permitted as of the beginning of an annual reporting period. The amendments in this update permit an entity to apply the new guidance using a prospective transition approach, a modified transition approach (based on the status of a project and whether software costs were capitalized before the date of adoption), or a full retrospective transition approach. The Company has not yet determined which approach to adopt nor the impact that the new guidance will have on the accounting for its internal-use software projects.

(2)Segment Information

TXNM hasthree reportable segments, namely PNM, TNMP, and Corporate and Other. The accounting policies of the segments are the same as those described in the summary of significant accounting policies. The measure of profitability used by the CODM is Segment earnings (loss) attributable to TXNM, as presented below. The CODM uses this measure of profitability to allocate resources for each segment predominantly in the annual budget and forecasting process. The CODM considers budget to actual variances on a regular basis when making decisions about allocating capital and operational expense funding to the segments. TXNM’s CODM is its current President and Chief Executive Officer (“CEO”) who is also the President and CEO of the PNM segment and the CEO of the TNMP segment.

PNM

PNM’s electric utility operations are subject to traditional rate regulation by the NMPRC. PNM provides integrated electricity services that include the generation, transmission, and distribution of electricity for retail electric customers in New Mexico; the generation and sale of electricity into the wholesale market, which includes the asset optimization of PNM’s jurisdictional capacity, as well as providing transmission services to third parties. FERC has jurisdiction over wholesale power and transmission rates. PNM’s operations also include the results of ETBC I since its formation in 2023.

TNMP

TNMP is an electric utility providing services in Texas under the TECA. TNMP’s operations are subject to traditional rate regulation by the PUCT. TNMP provides transmission and distribution services at regulated rates to various REPs that, in turn, provide retail electric service to consumers within TNMP’s service area. TNMP also provides transmission services at regulated rates to other utilities that interconnect with TNMP’s facilities.

Corporate and Other

The Corporate and Other segment includes TXNM holding company activities, primarily related to corporate level debt and PNMR Services Company. The activities of PNMR Development and the equity method investment in NMRD were also included in Corporate and Other until the close of the sale of NMRD on February 27, 2024. Eliminations of intercompany transactions are reflected in the Corporate and Other segment. The following tables present summarized financial information for TXNM by segment. PNM and TNMP each operate in onlyone segment. Therefore, tabular segment information is not presented for PNM and TNMP.

TXNM SEGMENT INFORMATION

Significant Segment Expenses

Reflected above are certain additional categories of operating expenses that are regularly provided to the CODM. Cost of energy consists primarily of fuel and purchase power costs for PNM and costs charged by third-party transmission providers for TNMP. Administrative and general - direct expenses are those that are incurred directly by the segment while Administrative and general - corporate allocation are those costs that are incurred by the Corporate and Other segment and allocated to the utilities based on the nature of the cost incurred. Administrative and general - corporate allocation is eliminated in the Corporate and Other segment. Customer related expenses include meter reading, customer service, and bad debt expenses.

(3)Accumulated Other Comprehensive Income (Loss)

Information regarding accumulated other comprehensive income (loss) for the nine months ended September 30, 2025 and 2024 is as follows:

The Condensed Consolidated Statements of Earnings include pre-tax amounts reclassified from AOCI related to Unrealized Gains on Available-for-Sale Debt Securities in gains on investment securities and Fair Value Adjustment for Cash Flow Hedges in interest charges. The income tax impacts of all amounts reclassified from AOCI are included in income taxes in the Condensed Consolidated Statements of Earnings.

(4)Earnings Per Share

Basic earnings per share is computed by dividing net earnings attributable to TXNM by the weighted average number of common shares outstanding during the period. Diluted earnings per share was computed by dividing net earnings attributable to TXNM by the diluted weighted average number of common shares outstanding during the period. Diluted earnings per share reflect the potential dilution that could occur if securities or other agreements to issue common stock were settled. TXNM applies the treasury stock method for restricted stock and the unsettled shares sold under forward sale agreements pursuant to the TXNM ATM Programs. Information regarding the computation of earnings per share is as follows:

TXNM’s weighted average number of common shares outstanding for the three and nine months ended September 30, 2025 was impacted by the settlement of 3.5 million shares sold and settled under the TXNM 2025 ATM Program,1.1 million shares sold and settled under the TXNM 2024 ATM Program, and the issuance of 11.6 million shares of common stock in private placement transactions. See Note 9.

(5)Electric Operating Revenues

TXNM is an investor-owned holding company withtwo regulated utilities providing electricity and electric services in New Mexico and Texas. TXNM’s electric utilities are PNM and TNMP. Additional information concerning electric operating revenue is contained in Note 4 of the Notes to Consolidated Financial Statements in the 2024 Annual Reports on Form 10-K.

Accounts Receivable and Allowance for Credit Losses

Accounts receivable consists primarily of trade receivables from customers. In the normal course of business, credit is extended to customers on a short-term basis. The Company estimates the allowance for credit losses on trade receivables based on historical experience and estimated default rates. Accounts receivable balances are reviewed monthly, adjustments to the allowance for credit losses are made as necessary and amounts that are deemed uncollectible are written off. In addition to the allowance for credit losses on trade receivables, the Company has evaluated other receivables for potential credit related losses. These balances include potential exposures for other non-retail utility services. In the three and nine months ended September 30, 2025 and 2024, there wereno estimated credit losses related to these transactions.

Contract Balances

Performance obligations related to contracts with customers are typically satisfied when the energy is delivered, and the customer or end-user utilizes the energy. Accounts receivable from customers represents amounts billed, including amounts under Alternative Revenue Programs (“ARP”). For PNM, accounts receivable reflected on the Condensed Consolidated Balance Sheets, net of allowance for credit losses, includes $139.9 million at September 30, 2025 and $94.3 million at December 31, 2024 resulting from contracts with customers. All of TNMP’s accounts receivable result from contracts with customers.

Contract assets are an entity’s right to consideration in exchange for goods or services that the entity has transferred to a customer when that right is conditioned on something other than the passage of time (for example, the entity’s future performance). Upon the completion of the Western Spirit Line, PNM entered into a TSA with Pattern Wind under an incremental tariff rate approved by FERC. The terms of the agreement provide for a financing component that benefits the customer. As such, the revenue that PNM recognizes will be in excess of the consideration received at the beginning of the service term resulting in a contract asset. The balance of the contract asset is $39.1 million at September 30, 2025 and $32.0 million at December 31, 2024. This contract asset is presented in Other deferred charges on the Condensed Consolidated Balance Sheets.

Disaggregation of Revenues

A disaggregation of revenues from contracts with customers by the type of customer is presented in the table below.

(6)Variable Interest Entities

How an enterprise evaluates and accounts for its involvement with variable interest entities focuses primarily on whether the enterprise has the power to direct the activities that most significantly impact the economic performance of a VIE. This evaluation requires continual reassessment of the primary beneficiary of a VIE. Additional information concerning PNM’s VIEs is contained in Note 10 of the Notes to Consolidated Financial Statements in the 2024 Annual Reports on Form 10-K.

Valencia

PNM has a PPA to purchase all of the electric capacity and energy from Valencia, a 155 MW natural gas-fired power plant near Belen, New Mexico, through May 2028. In May 2025, the NMPRC approved a new PPA for 167 MW, through 2039, in connection with the 2028 Resource Application. A third party built, owns, and operates the facility while PNM is the sole purchaser of the electricity generated. PNM is obligated to pay fixed operation and maintenance and capacity charges in addition to variable operation and maintenance charges. For the three and nine months ended September 30, 2025, PNM paid $5.2 million and $15.1 million for fixed charges and $1.7 million and $3.1 million for variable charges. For the three and nine months ended September 30, 2024, PNM paid $5.2 million and $15.3 million for fixed charges and $1.5 million and

$2.0 million for variable charges. PNM does not have any other financial obligations related to Valencia. The assets of Valencia can only be used to satisfy its obligations and creditors of Valencia do not have any recourse against PNM’s assets. During the term of the original PPA, PNM has the option, under certain conditions, to purchase and own up to 50% of the plant or the VIE. The original PPA specifies that the purchase price would be the greater of 50% of book value reduced by related indebtedness or 50% of fair market value.

PNM sources fuel for the plant, controls when the facility operates through its dispatch, and receives the entire output of the plant, which factors directly and significantly impact the economic performance of Valencia. Therefore, PNM has concluded that the third-party entity that owns Valencia is a VIE and that PNM is the primary beneficiary of the entity since PNM has the power to direct the activities that most significantly impact the economic performance of Valencia and will absorb the majority of the variability in the cash flows of the plant. As the primary beneficiary, PNM consolidates Valencia in its financial statements. Accordingly, the assets, liabilities, operating expenses, and cash flows of Valencia are included in the Condensed Consolidated Financial Statements of PNM although PNM has no legal ownership interest or voting control of the VIE. The assets and liabilities of Valencia are set forth below and are not shown separately on the Condensed Consolidated Balance Sheets. The owner’s equity and net income of Valencia are considered attributable to non-controlling interest.

Summarized financial information for Valencia is as follows: