ALBUQUERQUE, N.M.

February 6, 2024

Conference call at 11 a.m. Eastern today

•2023 GAAP earnings of $1.02 per diluted share

•2023 ongoing earnings of $2.82 per diluted share

•2024 ongoing earnings guidance range of $2.65 - $2.75 per diluted share

                PNM Resources (In millions, except EPS)

PNM Resources (NYSE: PNM) today released its 2023 earnings results. GAAP earnings include one-time charges for rate credits associated with the San Juan Generating Station abandonment settlement and disallowances in PNM’s recent rate case decision related to legacy generation assets.

In addition, management announced its 2024 consolidated ongoing earnings guidance of $2.65 to $2.75 per diluted share and refreshed its long-term earnings growth target to a range of 6% to 7% through 2028 based on the 2024 guidance midpoint of $2.70.

“Our financial results continue to demonstrate our ability to navigate our environment and deliver an attractive return on investments by increasing the geographic and regulatory diversification of our rate base,” said Pat Vincent-Collawn, PNM Resources’ chairman and CEO. “Our outlook for 2024 and beyond prioritizes investments supported by legislative and regulatory initiatives for a reliable and resilient grid to meet growing customer demands and enable the clean energy transition, resulting in targeted earnings growth of 6% to 7% through 2028.”

•PNM – a vertically integrated electric utility in New Mexico with distribution, transmission and generation assets.

•TNMP – an electric transmission and distribution utility in Texas.

•Corporate and Other – reflects the PNM Resources holding company and other subsidiaries.

Net changes to GAAP and ongoing earnings in 2023 compared to 2022 include:

•PNM: Lower costs associated with generation portfolio changes, increased customer usage due to hotter temperatures, increased transmission margins due to higher system demand, fewer gas plant outages, and improved market performance of decommissioning and reclamation trusts were partially offset by planned O&M expenses and depreciation and interest expense associated with new capital investments.

•TNMP: Increased rate recovery through the Transmission Cost of Service (TCOS) and Distribution Cost Recovery Factor (DCRF) mechanisms and higher demand-based load growth was partially offset by depreciation, property tax and interest expense associated with new capital investments and higher planned O&M expenses.

•Corporate and Other: Higher interest rates on variable rate debt, net of hedges, increased losses.

In addition, GAAP earnings decreased in 2023 primarily due to $242.0 million in regulatory disallowances and restructuring costs, which includes a settlement involving rate credits associated with the retirement of the San Juan Generating Station and disallowances in PNM’s recent rate case outcome related to legacy generation assets. These costs were offset by $33.3 million of net unrealized gains on investment securities in 2023 compared to $63.8 million of net unrealized losses in 2022.

Additional materials with information on quarterly results are available at

http://www.pnmresources.com/investors/results.cfm.

CONFERENCE CALL: 11 A.M. EASTERN TUESDAY, FEBRUARY 6

PNM Resources will discuss these items during a live conference call and webcast on Tuesday, February 6th at 11 a.m. Eastern. Speaking on the call will be Pat Vincent-Collawn, PNM Resources Chairman and Chief Executive Officer, Don Tarry, PNM Resources President and Chief Operating Officer, and Lisa Eden, PNM Resources Senior Vice President, Chief Financial Officer and Treasurer.

The conference call will be simultaneously broadcast and archived on our website at

http://www.pnmresources.com/investors/events-and-presentations. Listeners are encouraged to visit the website at least 30 minutes before the event to register, download and install any necessary audio software.

Investors and analysts can participate in the live conference call by pre-registering using the following link to receive a special dial-in number and PIN: https://dpregister.com/sreg/10185268/fb4a373624. Telephone participants who are unable to pre-register may participate in the live conference call by dialing (877) 276-8648 or (412) 317-5474 fifteen minutes prior to the event and referencing “the PNM Resources earnings call”.

Supporting material for PNM Resources’ earnings announcements can be viewed and downloaded at http://www.pnmresources.com/investors/results.cfm.

PNM Resources (NYSE: PNM) is an energy holding company based in Albuquerque, N.M., with 2023 consolidated operating revenues of $1.9 billion. Through its regulated utilities, PNM and TNMP, PNM Resources provides electricity to more than 800,000 homes and businesses in New Mexico and Texas. PNM serves its customers with a diverse mix of generation and purchased power resources totaling 3.1 gigawatts of capacity, with a goal to achieve 100% emissions-free generation by 2040. For more information, visit the company's website at www.PNMResources.com.

Analysts                        Media

Lisa Goodman                        Raymond Sandoval

(505) 241-2160                    (505) 241-2782

The preliminary unaudited financial results for the fiscal year ended December 31, 2023, included in this press release represent the most current information available to management and are not a comprehensive statement of the financial results for this period. Actual results may differ from these preliminary unaudited results due to the completion of the company's year-end financial closing procedures, including final adjustments, completion of the audit by the company's independent registered public accounting firm, completion of the internal control over financial reporting and other developments that may arise between the date of this press release and the time that financial results for the fiscal year ended December 31, 2023, are finalized.

Statements made in this news release for PNM Resources, Inc. (“PNMR”), Public Service Company of New Mexico (“PNM”), or Texas-New Mexico Power Company (“TNMP”) (collectively, the “Company”) that relate to future events or expectations, projections, estimates, intentions, goals, targets, and strategies, including the unaudited financial results and earnings guidance, are made pursuant to the Private Securities Litigation Reform Act of 1995. Readers are cautioned that all forward-looking statements are based upon current expectations and estimates and apply only as of the date of this report. PNMR, PNM, and TNMP assume no obligation to update this information. Because actual results may differ materially from those expressed or implied by these forward-looking statements, PNMR, PNM, and TNMP caution readers not to place undue reliance on these statements. PNMR's, PNM's, and TNMP's business, financial condition, cash flow, and operating results are influenced by many factors, which are often beyond their control, that can cause actual results to differ from those expressed or implied by the forward-looking statements. For a discussion of risk factors and other important factors affecting forward-looking statements, please see the Company’s Form 10-K, Form 10-Q filings and the information included in the Company’s Forms 8-K with the Securities and Exchange Commission, which factors are specifically incorporated by reference herein.

GAAP refers to generally accepted accounting principles in the U.S. Ongoing earnings is a non-GAAP financial measure that excludes the impact of net unrealized mark-to-market gains and losses on economic hedges, the net change in unrealized gains and losses on investment securities, pension expense related to previously disposed of gas distribution business, and certain non-recurring, infrequent, and other items that are not indicative of fundamental changes in the earnings capacity of the Company's operations. The Company uses ongoing earnings and ongoing earnings per diluted share to evaluate the operations of the Company and to establish goals, including those used for certain aspects of incentive compensation, for management and employees. While the Company believes these financial measures are appropriate and useful for investors, they are not measures presented in accordance with GAAP. The Company does not intend for these measures, or any piece of these measures, to represent any financial measure as defined by GAAP. Furthermore, the Company’s calculations of these measures as presented may or may not be comparable to similarly titled measures used by other companies. The Company uses ongoing earnings guidance to provide investors with management's expectations of ongoing financial performance over the period presented. While the Company believes ongoing earnings guidance is an appropriate measure, it is not a measure presented in accordance with GAAP. The Company does not intend for ongoing earnings guidance to represent an expectation of net earnings as defined by GAAP. Since the future differences between GAAP and ongoing earnings are frequently outside the control of the Company, management is generally not able to estimate the impact of the reconciling items between forecasted GAAP net earnings and ongoing earnings guidance, nor their probable impact on GAAP net earnings without unreasonable effort, therefore, management is generally not able to provide a corresponding GAAP equivalent for ongoing earnings guidance. Reconciliations between GAAP and ongoing earnings are contained in schedules 1-4.