TXNM ENERGY INC

TNMP

TNMP provides only transmission and distribution services and does not sell power.

PNM

Generation Capacity

PNM’s capacity in electric generating facilities in commercial operation as of December 31, 2024 are as follows:

Renewable and Energy Storage Resources

In addition to PNM’s owned and contracted solar facilities, PNM has a customer distributed solar generation program that represented 308.5 MW at December 31, 2024. PNM stores energy under ESAs and purchases renewable power under long-term PPAs, all currently having expiration dates beginning in January 2035 and extending through May 2047. The NMPRC has approved plans for PNM to procure energy and RECs from additional resources to serve retail customers and a data center located in PNM’s service territory, which are expected to be in service by summer of 2026. If adjusted for these approved plans, the table above would reflect the percentage of generation capacity from renewable resources of 52.1%, energy

A - 5 storage resources of 19.2%, nuclear resources of 5.6%, and fossil-fueled resources of 23.1%. In addition, PNM has filed an application with the NMPRC seeking approval of resources to be available for the 2028 summer peak, which are necessary for PNM to meet forecasted peak load requirements to serve its customers and to continue progress towards a carbon-free generating portfolio. These resources and their currently expected operation dates are as follows:

Fossil‑Fueled Plants

Four Corners Units 4 and 5 are 13% owned by PNM. These units are jointly owned with APS, SRP, Tucson, and NTEC, and are operated by APS. PNM had no ownership interest in Four Corners Units 1, 2, or 3, which were shut down by APS in 2013. The Four Corners plant site is located on land within the Navajo Nation and is subject to an easement from the federal government. APS, on behalf of the Four Corners participants, negotiated amendments to extend the owners’ right to operate the plant on the site to July 2041.

PNM owns 100% of Reeves, Afton, Rio Bravo, Lordsburg, and La Luz and one-third of Luna. The remaining interests in Luna are owned equally by Tucson and Samchully Power & Utilities 1, LLC. PNM is also entitled to the entire output of Valencia under a PPA. Reeves, Lordsburg, Rio Bravo, La Luz, and Valencia are used primarily for peaking power and transmission support. As discussed in Note 10, Valencia is a variable interest entity and is consolidated by PNM.

Nuclear Plant

PNM is participating in the three units of PVNGS with APS (the operating agent), SRP, EPE, SCE, SCPPA, and the Department of Water and Power of the City of Los Angeles. PNM has ownership interests of 2.3% in Unit 1, 9.4% in Unit 2, and 10.2% in Unit 3. See Note 16 for information on other PVNGS matters.

Purchased Power

PNM engages in activities to optimize its existing jurisdictional assets and long-term power agreements through transacting in the hour-ahead, day-ahead, week-ahead, and month-ahead bilateral markets that allows PNM to market any excess generation not required to fulfill retail load and contractual commitments.

PNM participates in the EIM, a real-time wholesale energy trading market operated by CAISO, which enables participating electric utilities to buy and sell energy, which has generated cost savings that are passed through to customers under PNM’s FPPAC. PNM also plans to join the EDAM, which is a voluntary day-ahead regional market that expands on CAISO’s EIM market, as early as 2027. PNM also engages in activities to optimize its existing jurisdictional assets and long-term power agreements through transacting in the hour-ahead, day-ahead, week-ahead, and month-ahead bilateral markets that allows PNM to market any excess generation not required to fulfill retail load and contractual commitments. PNM joined the WRAP in April 2023, which is a first-of-its-kind program in the West that adds a region-wide coordination between power providers for assessing and addressing resource adequacy. WRAP is currently in the non-binding phases of the program, which is expected to continue through the summer of 2027.

A - 6

Plant Operating Statistics

Equivalent availability of PNM’s major base-load generating stations was:

Joint Projects

SJGS, PVNGS, Four Corners, and Luna are joint projects each owned or leased by several different entities. Some participants in the joint projects are investor-owned entities, while others are privately, municipally, tribally, or co-operatively owned. Furthermore, participants in SJGS had varying percentage interest in different generating units within the project and have different percentage interest with respect to plant decommissioning and coal mine reclamation obligations.

The primary operating or participation agreements for the other joint projects expire July 2041 for Four Corners, December 2046 for Luna, and November 2047 for PVNGS. As described above, Four Corners is located on land within the Navajo Nation and is subject to an easement from the federal government.

It is possible that other participants in the joint projects have circumstances and objectives that have changed from those existing at the time of becoming participants. The status of these joint projects is further complicated by the uncertainty surrounding the form of potential legislation and/or regulation of GHG, other air emissions, and CCRs, as well as the impacts of the costs of compliance and operational viability of all or certain units within the joint projects. It is unclear how these factors will enter into discussions and negotiations concerning the status of the joint projects as the expiration of basic operational agreements approaches. PNM can provide no assurance that its participation in the joint projects will continue in the manner that currently exists.