The Company’s financing strategy includes both short-term and long-term borrowings. The Company utilizes short-term revolving credit facilities, as well as cash flows from operations, to provide funds for both construction and operating expenditures. Depending on market and other conditions, the Company will periodically sell long-term debt or enter into term loan arrangements and use the proceeds to reduce borrowings under the revolving credit facilities or refinance other debt. Each of the Company’s revolving credit facilities, term loans, and other debt agreements contains a single financial covenant that requires the maintenance of a debt-to-capitalization ratio. For the PNMR agreements this ratio must be maintained at less than or equal to 70%, and for the PNM and TNMP agreements this ratio must be maintained at less than or equal to 65%. The Company’s revolving credit facilities, term loans, and other debt agreements generally also contain customary covenants, events of default, cross-default provisions, and change-of-control provisions. PNM must obtain NMPRC approval for any financing transaction having a maturity of more than 18 months. In addition, PNM files its annual informational financing filing and short-term financing plan with the NMPRC. Additional information concerning financing activities is contained in Note 7 of the Notes to Consolidated Financial Statements in the 2020 Annual Reports on Form 10-K.

At December 31, 2020, PNM had $146.0 million of outstanding PCRBs, which have a final maturity of April 1, 2033. These PCRBs were subject to mandatory tender on October 1, 2021 and were successfully remarketed to new investors on that date. The $146.0 million PCRBs bear interest at a fixed rate of 2.15% until their final maturity.

On September 23, 2021, PNM entered into an agreement (the "PNM September 2021 Note Purchase Agreement") with institutional investors for the sale and issuance of $150.0 million aggregate principal amount of two series of Senior Unsecured Notes (the "PNM September 2021 SUNs") to be offered in private placement transactions. The PNM September 2021 SUNs will be issued on or before December 30, 2021. PNM will issue $50.0 million of the PNM September 2021 SUNs at 2.29%, due December 30, 2031, and another $100.0 million at 2.97%, due December 30, 2041. Proceeds from the PNM September 2021 SUNs will be used for funding of capital expenditures, including the purchase of the Western Spirit transmission line, repayment of existing indebtedness, and for general corporate purposes. The PNM September 2021 Note Purchase Agreement includes the customary covenants discussed above. In the event of a change of control, PNM will be required to offer to prepay the PNM September 2021 SUNs at par. Although there are customary change of control provisions in the PNM debt agreements, the change of control provisions in these agreements, including the PNM September 2021 Note Purchase Agreement, are not triggered by the closing of the Merger. PNM has the right to redeem any or all of the PNM September 2021 SUNs prior to their maturities, subject to payment of a customary make-whole premium.

On July 14, 2021, TNMP entered into an agreement (the "TNMP 2021 Bond Purchase Agreement") with institutional investors for the sale of $65.0 million aggregate principal amount of one series of TNMP first mortgage bonds (the "TNMP 2021 Bonds") offered in private placement transactions. On August 16, 2021, TNMP issued all $65.0 million of the TNMP 2021 Bonds at 2.44% with a maturity of August 15, 2035 and used the proceeds to repay existing debt and for other corporate purposes. The TNMP 2021 Bonds are subject to continuing compliance with the representations, warranties and covenants set forth in the supplemental indenture governing the TNMP 2021 Bonds. The terms of the supplemental indenture governing the TNMP 2021 Bonds include the customary covenants discussed above. In the event of a change of control, TNMP will be required to offer to prepay the TNMP 2021 Bonds at par. However, the definition of change of control in the supplemental indenture governing the TNMP 2021 Bonds will not be triggered by the closing of the Merger. TNMP has the right to redeem any or all of the TNMP 2021 Bonds prior to their maturity, subject to payment of a customary make-whole premium.

On July 14, 2021, PNM entered into an agreement (the "PNM 2021 Note Purchase Agreement") with institutional investors for the sale and issuance of $160.0 million aggregate principal amount of two series of Senior Unsecured Notes (the "PNM 2021 SUNs") offered in private placement transactions. The PNM 2021 SUNs were issued on July 14, 2021. PNM issued $80.0 million of the PNM 2021 SUNs at 2.59%, due July 15, 2033, and another $80.0 million at 3.14%, due July 15, 2041. Proceeds from the PNM 2021 SUNs were used to repay the total amount of $160.0 million of PNM's 5.35% SUNs, at par, earlier than their scheduled maturity of October 1, 2021. The PNM 2021 Note Purchase Agreement includes the customary covenants discussed above. In the event of a change of control, PNM will be required to offer to prepay the PNM 2021 SUNs at par. Although there are customary change of control provisions in the PNM debt agreements, the change of control provisions in these agreements, including the PNM 2021 Note Purchase Agreement, are not triggered by the closing of the Merger. PNM has the right to redeem any or all of the PNM 2021 SUNs prior to their maturities, subject to payment of a customary make-whole premium.

On June 18, 2021, PNM entered into a $75.0 million term loan (the "PNM 2021 Term Loan") between PNM and Bank of America, N.A., as lender. The PNM 2021 Term Loan was used to repay the PNM 2019 $40.0 million Term Loan and for other corporate purposes. The PNM 2021 Term Loan bears interest at a variable rate, which was 0.91% at September 30, 2021 and matures on December 18, 2022.

On May 18, 2021, PNMR entered into a $1.0 billion delayed-draw term loan agreement (the “PNMR 2021 Delayed-Draw Term Loan”), among PNMR, the lenders party thereto, and Wells Fargo Bank, National Association, as administrative agent. Initially PNMR drew $850.0 million to repay and terminate existing indebtedness including the $150.0 million PNMR 2019 Term Loan, the $300.0 million PNMR 2020 Delayed-Draw Term Loan, the $150.0 million PNMR 2020 Term Loan, $92.1 million in borrowings under the PNMR Revolving Credit Facility, the $65.0 million PNMR Development Term Loan, and $40.0 million in borrowings under the PNMR Development Revolving Credit Facility, which was then terminated. Draws on the PNMR 2021 Delayed-Draw Term Loan bear interest at a variable rate, which was 0.94% at September 30, 2021, and mature on May 18, 2023.

The PNMR 2021 Delayed-Draw Term Loan provides that substantially concurrently with the consummation of the transactions set forth in the Merger Agreement, PNMR will assign to Avangrid all of its rights, duties, obligations and liabilities under the PNMR 2021 Delayed-Draw Term Loan and Avangrid will assume from PNMR, as its direct and primary obligation, the payment and performance of all of the duties, liabilities and obligations of PNMR under the PNMR 2021 Delayed-Draw Term Loan pursuant to an amendment and restatement of the PNMR 2021 Delayed-Draw Term Loan in the form of an amended and restated credit agreement attached to the PNMR 2021 Delayed-Draw Term Loan.

On April 24, 2020, TNMP entered into an agreement (the "TNMP 2020 Bond Purchase Agreement") with institutional investors for the sale of $185.0 million aggregate principal amount of four series of TNMP first mortgage bonds (the "TNMP 2020 Bonds") offered in private placement transactions. TNMP issued $110.0 million of TNMP 2020 Bonds on April 24, 2020 and used the proceeds to repay borrowings under the TNMP Revolving Credit Facility and for other corporate purposes. TNMP issued the remaining $75.0 million of TNMP 2020 Bonds on July 15, 2020 and used the proceeds from that issuance to repay borrowings under the TNMP Revolving Credit facility and for other corporate purposes. The TNMP 2020 Bonds are subject to continuing compliance with the representations, warranties and covenants set forth in the indenture governing the TNMP 2020 Bonds. The terms of the supplemental indenture governing the TNMP 2020 Bonds include the customary covenants discussed above. In the event of a change of control, including the closing of the Merger, TNMP will be required to offer to prepay the TNMP 2020 Bonds at par. TNMP has the right to redeem any or all of the TNMP 2020 Bonds prior to their respective maturities, subject to payment of a customary make-whole premium.

On April 15, 2020, PNM entered into a $250.0 million term loan agreement (the "PNM 2020 Term Loan"), between PNM, the lenders party thereto, and U.S. Bank, as administrative agent. Proceeds from the PNM 2020 Term Loan were used to prepay the PNM 2019 $250.0 million Term Loan due July 2020, without penalty. As discussed below, on April 30, 2020, PNM used $100.0 million of proceeds from the PNM 2020 SUNs to prepay without penalty an equal amount of the PNM 2020 Term Loan. On December 21, 2020, PNM prepaid without penalty the remaining $150.0 million balance of the PNM 2020 Term Loan.

On April 30, 2020, PNM entered into an agreement (the "PNM 2020 Note Purchase Agreement") with institutional investors for the sale of $200.0 million aggregate principal amount of senior unsecured notes offered in private placement transactions. Under the agreement, on April 30, 2020, PNM issued $150.0 million aggregate principal amount of its 3.21% senior unsecured notes, Series A, due April 30, 2030, and $50.0 million of its aggregate principal amount of its 3.57% senior unsecured notes, Series B, due April 29, 2039 (the "PNM 2020 SUNs"). PNM used $100.0 million of proceeds from the PNM 2020 SUNs to repay an equal amount of the PNM 2020 Term Loan. The remaining $100.0 million of the PNM 2020 SUNs

were used to repay borrowings on the PNM Revolving Credit Facility and for other corporate purposes. The PNM 2020 Note Purchase Agreement includes the customary covenants discussed above. Although there are customary change of control provisions in the PNM debt agreements, including the PNM 2020 Note Purchase Agreement, the change of control provisions in these agreements are not triggered by the closing of the Merger. PNM has the right to redeem any or all of the PNM 2020 SUNs prior to their maturities, subject to payment of a customary make-whole premium.

At December 31, 2019, PNM had $40.0 million of outstanding PCRBs, which have a final maturity of June 1, 2040 and two series of outstanding PCRBs of $39.3 million and $21.0 million, which have a final maturity of June 1, 2043. These PCRBs, aggregating $100.3 million, were subject to mandatory tender on June 1, 2020. On June 1, 2020, PNM purchased these PCRBs utilizing borrowings under the PNM Revolving Credit Facility and converted the PCRBs to the weekly mode. PNM held these PCRBs (without legally canceling them) until July 1, 2020, when they were remarketed in the weekly mode (the "PNM Floating Rate PCRBs") and PNM used the remarketing proceeds to repay the revolver borrowings. PNM Floating Rate PCRBs in the weekly mode bore interest at rates that were reset weekly, giving investors the option to return the PCRBs for remarketing to new investors upon 7 days' notice. At September 30, 2021, this rate was 0.11%. A corresponding portion of the borrowing capacity under the PNM Revolving Credit Facility was reserved to support the investors' option to return the PNM Floating Rate PCRBs upon 7 days' notice. On October 1, 2021 PNM converted the PNM Floating Rate PCRBs to a fixed rate period and successfully remarketed them to new investors ("PNM 2021 Fixed Rate PCRBs"). The PNM 2021 Fixed Rate PCRBs now bear interest at 0.875% and are subject to mandatory tender on October 1, 2026.

At June 30, 2020 and December 31, 2019, PNM had PCRBs outstanding of $36.0 million at 6.25% issued by the Maricopa County, Arizona Pollution Control Corporation as well as $255.0 million at 5.90% and $11.5 million at 6.25% issued by the City of Farmington, New Mexico. The $36.0 million PCRBs became callable at 101% of par on January 1, 2020 and the remaining $266.5 million PCRBs became callable at par on June 1, 2020. On June 22, 2020, PNM provided notice to the bondholders that it was calling the PCRBs aggregating $302.5 million. On July 22, 2020, PNM purchased the PCRBs in lieu of redemption and remarketed them to new investors (the "PNM 2020 Fixed Rate PCRBs"). Information concerning the funding dates, mandatory tender dates, and interest rates on the PNM 2020 Fixed Rate PCRBs can be found in Note 7 of the Notes to Consolidated Financial Statements in the 2020 Annual Reports on Form 10-K.

In August 2020, PNMR entered into letter of credit arrangements with Wells Fargo Bank, N.A. (the "WFB LOC Facility") under which letters of credit aggregating $30.3 million were issued to facilitate the posting of reclamation bonds currently held by WSJ LLC (who assumed all the obligations of SJCC post-bankruptcy). The reclamation bonds were required to be posted in connection with permits relating to the operation of the San Juan mine.

On March 9, 2018, PNMR issued $300.0 million aggregate principal amount of 3.25% SUNs (the “PNMR 2018 SUNs”), which were set to mature on March 9, 2021. On December 22, 2020, PNMR entered into the $300.0 million PNMR 2020 Delayed-Draw Term Loan that would have matured in January 2022 and drew $80.0 million to refinance existing indebtedness and for other corporate purposes. On March 9, 2021, PNMR utilized the remaining $220.0 million of capacity under the PNMR 2020 Delayed-Draw Term Loan to repay an equivalent amount of the PNMR 2018 SUNs. The remaining $80.0 million repayment of the PNMR 2018 SUNs was funded through borrowings under the PNMR Revolving Credit Facility.

On October 20, 2020, the execution of the Merger Agreement constituted a “Change of Control” under certain PNMR, TNMP, and PNMR Development debt agreements. Under each of the specified debt agreements, a “Change of Control” constitutes an “Event of Default,” pursuant to which the lender parties thereto have the right to accelerate the indebtedness under the debt agreements. The definition of Change of Control under the PNM debt agreements and PNM note purchase agreements was not triggered by the execution of the Merger Agreement.

On October 26, 2020, PNMR, TNMP and PNMR Development entered into amendment agreements with the lender parties thereto to amend the definition of "Change of Control" such that the entry into the Merger Agreement would not constitute a Change of Control and to waive the Event of Default arising from entry into the Merger Agreement. On September 15, 2021, PNMR and TNMP entered into amendment agreements with the lender parties thereto to further amend the definition of "Change of Control" such that the closing of the Merger does not constitute a Change of Control. The Change of Control provisions in the PNM debt agreements, PNM note purchase agreements, and TNMP 2021 Bond Purchase Agreement are not triggered by the closing of the Merger and did not require amendment.

The documents governing TNMP's aggregate $750.0 million of outstanding 2014 to 2020 First Mortgage Bonds ("TNMP FMBs") obligated TNMP to offer, within 30 business days following the signing of the Merger Agreement, to prepay all $750.0 million outstanding TNMP FMBs at 100% of the principal amount, plus accrued and unpaid interest thereon, but without any make-whole amount or other premium. TNMP made such offer to prepay the TNMP FMBs in accordance with the

terms of the TNMP FMBs, and none of the holders of the TNMP FMBs accepted TNMP’s offer. The documents governing the 2014 to 2020 TNMP FMBs require TNMP to make another offer, within 30 business days of closing of the Merger, to prepay all $750.0 million outstanding TNMP FMBs at par. TNMP will make such offer to prepay all $750.0 million outstanding TNMP FMBs in accordance with the terms of the TNMP FMBs; however, holders of the TNMP FMBs are not required to tender their TNMP FMBs and may accept or reject such offer to prepay. As discussed above, the supplemental indenture that governs the TNMP 2021 Bonds excludes the Merger from the definition of Change of Control.

The TNMP FMBs are not registered under the Securities Act and may not be offered or sold in the United States absent registration or applicable exemption from registration requirements and applicable state laws. The information in this Quarterly Report on Form 10-Q is for informational purposes only and is neither an offer to purchase, nor a solicitation of an offer to sell, subscribe for or buy any securities in any jurisdiction pursuant to the proposed transactions or otherwise, nor shall there be any sale, issuance or transfer of securities in any jurisdiction in contravention of applicable law. Similar to the offer to prepay made after signing the Merger Agreement, the post-Merger closing offer to prepay the TNMP FMBs will be made only pursuant to an offer to prepay, which will set forth the terms and conditions of the offer to prepay.

Currently, the PNMR Revolving Credit Facility has a financing capacity of $300.0 million and the PNM Revolving Credit Facility has a financing capacity of $400.0 million. Both facilities currently expire on October 31, 2023 and contain options to be extended through October 2024, subject to approval by a majority of the lenders. PNM also has the $40.0 million PNM 2017 New Mexico Credit Facility that expires on December 12, 2022. The TNMP Revolving Credit Facility is a $75.0 million revolving credit facility secured by $75.0 million aggregate principal amount of TNMP first mortgage bonds that matures on September 23, 2022 and contains two one-year extension options, subject to approval by a majority of the lenders. PNMR Development had a $40.0 million revolving credit facility that was set to expire on January 31, 2022. As discussed above, on May 18, 2021, the PNMR Development Revolving Credit Facility was terminated. Variable interest rates under these facilities are based on LIBOR but contain provisions which allow for the replacement of LIBOR with other widely accepted interest rates.

At September 30, 2021, the weighted average interest rate was 1.58% for the PNMR Revolving Credit Facility. There were no borrowings outstanding under the PNM Revolving Credit Facility, the PNM 2017 New Mexico Revolving Credit Facility, or the TNMP Revolving Credit Facility at September 30, 2021.

In addition to the above borrowings, PNMR, PNM, and TNMP had letters of credit outstanding of $3.4 million, $2.2 million, and zero at September 30, 2021 that reduce the available capacity under their respective revolving credit facilities. The above table excludes intercompany debt. As of September 30, 2021 and December 31, 2020, neither PNM nor TNMP had any intercompany borrowings from PNMR. PNMR Development had $0.1 million and $0.3 million in intercompany borrowings from PNMR at September 30, 2021 and December 31, 2020. PNMR had no intercompany borrowings from PNM, TNMP, or PNMR Development at either of September 30, 2021 or December 31, 2020.

In 2017, PNMR entered into three separate four-year hedging agreements whereby it effectively established fixed interest rates of 1.926%, 1.823%, and 1.629%, plus customary spreads over LIBOR for three separate tranches, each of $50.0 million, of its variable rate debt. On March 23, 2021 the 1.926% fixed interest rate hedge agreement expired according to its terms and the remaining agreements expired on May 23, 2021.

At October 22, 2021, PNMR, PNM, and TNMP had availability of $286.0 million, $397.8 million, and $75.0 million under their respective revolving credit facilities, including reductions of availability due to outstanding letters of credit. PNM also had $40.0 million of availability under the PNM 2017 New Mexico Credit Facility. Total availability at October 22, 2021, on a consolidated basis, was $798.8 million for PNMR. As of October 22, 2021, PNM and TNMP had no borrowings from PNMR under their intercompany loan agreements however, PNMR Development had $0.2 million in borrowings from PNMR. PNMR had no borrowings from PNM, TNMP, or PNMR Development. At October 22, 2021, PNMR, PNM, and TNMP had invested cash of $0.9 million, $61.8 million, and $11.4 million.

The Company’s debt arrangements have various maturities and expiration dates. PNM has $104.5 million of PCRBs that must be repriced in June 2022. Additional information on debt maturities is contained in Note 7 of the Notes to Consolidated Financial Statements in the 2020 Annual Reports on Form 10-K.