SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 of the

Securities Exchange Act of 1934

For the month of July, 2026

Commission File Number 1-34129

AXIA Energia S.A.

(Exact name of registrant as specified in its charter)

AXIA Energia S.A.

(Translation of Registrant's name into English)

Avenida Graça Aranha, 26
Centro, CEP 20030-900
Rio de Janeiro, RJ, Brazil

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ___X___ Form 40-F _______

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _______ No___X____

~~COMMENCEMENT~~ THIS NOTICE OF IS FOR INFORMATIONAL PURPOSES ONLY AND DOES NOT CONSTITUTE AN OFFER TO SELL SECURITIES.CLOSING NOTICEOF THE PUBLIC OFFERING, UNDER THE AUTOMATIC REGISTRATION PROCEDURE, OF SIMPLE DEBENTURES, NON-CONVERTIBLE INTO SHARES, OF THE UNSECURED TYPE, IN A SINGLE SERIES, FOR PUBLIC DISTRIBUTION, OF THE 9TH (NINTH) ISSUANCE OFOFAXIA ~~AXIA~~ ENERGIA S.A. CNPJ no. 00.001.180/0001-2626in in the amount ~~of R~~ofR$ 1,000,000,000.00 (one billion reais) ISIN CODE OF DEBENTURES: ~~BRAXIADBS0F1~~BRAXIADBS0F1Final ~~Final~~ Issue Risk Rating of “brAAA” assigned by Standard & Poor’s Ratings do Brasil Ltda. on June 30, 2026. *This rating was made on June 30, 2026; the characteristics of this security are subject to change. DISCLOSURE OF A PROSPECTUS WAS WAIVED, PURSUANT TO ITEM I OF ARTICLE 9, AND OF THE INFORMATION SHEET, IN ACCORDANCE WITH §1 OF ARTICLE 23, BOTH OF CVM RESOLUTION 160 (AS DEFINED BELOW) FOR THE EXECUTION OF THIS OFFER (AS DEFINED BELOW). THE REGISTRATION OF THE OFFER OF THE DEBENTURES WAS AUTOMATICALLY GRANTED BY THE BRAZILIAN SECURITIES AND EXCHANGE COMMISSION (“CVM”) ON JULY 2, 2026, UNDER NO. CVM/SRE/AUT/DEB/PRI/2026/332. 1. SECURITY OFFERED AND IDENTIFICATION OF THE ~~OFFEROR~~OFFERORAXIA ~~AXIA~~ ENERGIA S.A., a corporation registered as a securities issuer, category "“A"”, before the CVM, in an operational phase, headquartered in the city of Rio de Janeiro, ~~State~~ state of Rio de Janeiro, at Avenida Graça Aranha, nº 26, Loja A, Centro, CEP 20.030-900, registered inwith the National Register of Legal Entities of the Ministry of Finance ("“CNPJ"”) under Nono. 00.001.180/0001- 26, with its constitutive acts registered with the Board of Trade of the State of Rio de Janeiro under NIRE 33.300.346.767 ("“Issuer"”), together with BTG PACTUAL INVESTMENT BANKING LTDA., an institution that is part of the securities distribution system, with an office in the City of São Paulo, State of São Paulo, at Avenida Brigadeiro Faria Lima, n.º 3.477, 14º andar, CEP 04538-133, ~~enrolled~~registered with the CNPJ under Nono. 46.482.072/0001-13 (“Lead Coordinator”) and XP INVESTIMENTOS CORRETORA DE CÂMBIO, TÍTULOS E VALORES MOBILIÁRIOS S.A., a financial institution that is part of the securities distribution system, headquartered in the city of Rio de Janeiro, State of Rio de Janeiro, at Praia do Botafogo, nº 501, bloco 1, CEP 22.250-911, enrolled with the CNPJ under nºNo. 02.332.886/0001-04 (“XP Investimentos” and, together with the Lead Coordinator, the “Coordinators”), hereby communicate, ~~pursuant~~on tothis ~~article 59~~date, ~~item~~pursuant IIto ~~and~~article ~~§3,~~ 76 of CVM Resolution No. 160, of July 13, 2022, as in force (“CVM Resolution 160” and “~~Commencement~~Closing Notice”, respectively), the ~~beginning~~closing of the public distribution of 1,000,000 (one million) simple debentures, not convertible into shares, of the unsecured type, in a single series, of the 9th (ninth) issuance of the Issuer ("Debentures" and ~~“Issue~~"Issuance", respectively), all with a nominal unit value of R$ 1,000.00 (one thousand reais), on the issuance date, that is, June 15, 2026 ("Nominal Unit Value" and "Issuance Date", respectively), totaling, on the ~~Issuance~~ Issuance Date, the ~~total~~ amount of R$ 1,000,000,000.00 (one billion reais), as provided for in the "Private Instrument of Issuance Deed of the 9th (Ninth) Issue of Simple Debentures, Non-Convertible into Shares, of the Unsecured Type, in a Single Series, for Public Distribution, under the Automatic Registration Procedure, of ~~Axia~~AXIA Energia S.A.”", entered into on June 22, 2026, between the Issuer, and VÓRTX DISTRIBUIDORA DE TÍTULOS E VALORES MOBILIÁRIOS LTDA., a financial institution authorized to operate by the Central Bank of Brazil, incorporated as a limited liability company, headquartered in the city of São Paulo, State of São Paulo, at ~~Rua~~ Rua Gilberto Sabino, nº 215, 4º andar, Pinheiros, CEP 05.425-020, enrolled with the CNPJ under No. 22.610.500/0001-88 (www.vortx.com.br), as trustee, ~~and~~representing ~~representative~~the communion of the holders of the Debentures, ~~within the scope of the Issue~~ (“Trustee” and “Original Issuance Deed”, respectively), as amended by the “First Amendment to the Private Instrument of Issuance Deed of the 9th (Ninth) Issue of Simple Debentures, Non-Convertible into Shares, of the Unsecured Type, in a Single Series, for Public Distribution, under the Automatic Registration Procedure, of ~~Axia~~AXIA Energia S.A.”, entered into on July 1, 2026, between the Issuer and the Trustee (“First Amendment to the Original Issuance Deed” and, when together with the Original Issuance Deed, "“Issuance Deed"”), intended ~~exclusively~~ for professional investors, as defined under the terms of articles 11 and 13 of CVM Resolution No. 30, of May 11, 2021, as amended ("“Professional Investors"”), ~~being,~~pursuant ~~therefore, subject~~ to ~~the automatic registration procedure of public offering of securities distribution, pursuant to article 25 and article 26, item IV, item "a", of CVM Resolution 160, of article 19 of~~ Law No. 6.,385, of December 7, 1976, as amended ~~and~~, ~~other~~of ~~applicable~~CVM ~~laws~~Resolution 160 and ~~regulations~~other applicable legal provisions (“Offer”). ~~2. PROJECT~~ The Debentures were issued in the manner provided for in article 2 of Law No. 12.431, of June 24, 2011, as amended (“Law 12.431”), and in Decree No. 11.964, of March 26, 2024, as amended (“Decree 11.964”), or rules that amend, replace or complement them. The Project (as defined below) was filed with the National Secretariat for Energy Transition and Planning of the Ministry of Mines and Energy (“MME”) under No. 48340.003708/2026-35, on June 19, 2026. Pursuant to article 2, paragraph 1, of Law 12.431, Decree 11.964, and Resolution of the National Monetary Council ("CMN") No. 5.034, of July 21, 2022, as amended ("CMN Resolution 5.034"), the funds raised by the Issuer through the Debentures will be used exclusively for future payment, reimbursement of expenses, costs or debts related to the implementation of the project described below ("Project") that have occurred within a period equal to or less than 48 (forty-eight) months from the closing date of the Offer: MME Filing 48340.003708/2026-35, on 06/19/~~2026~~2026Corporate ~~Corporate~~ Name and CNPJ of the Priority Project ~~Holder~~HolderSanto ~~Santo~~ Antônio Energia S.A.; CNPJ: 09.391.823/0001-6060Priority ~~Priority~~ Sector in which the Project is ~~Classified~~ClassifiedEnergy ~~Energy~~ - Generation from renewable sources (Art. 4, III, point "a") Project Name HPP Santo ~~Antônio~~AntônioProject ~~Project~~Purpose ~~Object~~ Payment of future expenses or reimbursement of expenditures, expenses or debts related to projects for investment in CAPEX related to the implementation, operation, maintenance and modernization of the ~~HPP~~UHE Santo Antônio, subject of MME Concession ~~Contract~~Agreement No. 01/2008. Project Objective Generation of renewable electric energy for commercialization in the free and regulated energy markets. Project Start ~~Date March~~DateMarch/~~2012 Estimated~~ 2012Estimated Project Closure Date October/~~2047~~2047Current ~~Current~~ Project ~~Phase The~~PhaseThe Santo Antônio HPP has been in operation since 03.30.2012. Social or environmental benefits arising from the implementation of the ~~Project~~ProjectThe ~~The~~ HPP generates jobs in the region, as well as revenues for the municipality, fostering local development. In addition, the project owner is part of the Axia group, which is committed to sustainable development and the preservation of the areas around its projects. It is noteworthy that, in its business, the Axia group considers aspects related to climate change, including goals to reduce and neutralize its emissions. The group also makes various social investments and adopts a continuous practice of forming partnerships in support of social programs. Estimated volume of financial resources required to carry out the ~~Project R~~ProjectR$ 20,076,000,000.0000Estimated ~~Estimated~~ volume of financial resources to be raised with the ~~Issue R~~IssueR$ 1,000,000,000.0000Percentage ~~Percentage~~ that is estimated to be raised with the Debentures in view of the Project'’s financial resources ~~needs 4~~needs4.98%2 3.BOOKKEEPERThe ~~WAIVER~~institution OFproviding ~~PROSPECTUS AND OFFER INFORMATION SHEET The Debentures shall be~~bookkeeping ~~offered~~services ~~exclusively~~for ~~to Professional Investors, therefore disclosure of a prospectus and information sheet and~~ the ~~use~~Debentures ofunder anthis ~~Offering acceptance~~Issue ~~document~~is ~~are~~BTG ~~waived,~~PACTUAL ~~pursuant~~SERVIÇOS toFINANCEIROS ~~article~~S.A. 9DTVM, ~~item~~headquartered Iat ~~and~~Praia ~~paragraph~~de 3Botafogo, ~~and article 23, paragraph 1, both of CVM Resolution 160.~~ 4.nº ~~AUTOMATIC REGISTRATION PROCEDURE FOR DISTRIBUTION The registration of the Offer was granted by CVM on July 2~~501, ~~2026,~~5º ~~under~~andar no. CVM/SRE/AUT/DEB/PRI/2026/332. The Offer will be made under the automatic registration procedure and has not been submitted to the prior analysis of the Brazilian Association of Financial and Capital Market Entities (~~“ANBIMA”~~parte) ~~or any regulatory or self-regulatory entity~~, ~~pursuant to article 26~~Botafogo, ~~item~~ ~~IV,~~city ~~item~~of ~~“a”,~~Rio ~~and~~de ~~article 27~~Janeiro, ~~item~~state ~~I, both~~ of ~~CVM~~Rio ~~Resolution~~de ~~160~~Janeiro, ~~considering~~CEP ~~that (i) the Issuer qualifies as a frequent issuer of fixed income securities – EFRF~~2250-040, asregistered ~~it is an issuer~~ with ~~great exposure to~~ the ~~market – EGEM, as provided for in~~CNPJ ~~item~~under ~~I, article 38-A of CVM Resolution~~ No. ~~80,~~59.281.253/0001-23 ~~of March 29, 2022, as in force;~~ (ii“Bookkeeper”), ~~the~~a ~~Debentures~~term ~~are~~that ~~non-convertible~~includes ~~and~~any ~~not~~other ~~exchangeable into~~institution ~~shares~~that ~~issued~~may bysucceed the ~~Issuer;~~Bookkeeper ~~and~~in providing ~~(iii)~~ the ~~Offer~~bookkeeping ~~will~~services beset ~~intended~~forth ~~exclusively~~in ~~for~~this ~~Professional~~Issuance ~~Investors.~~Deed, ~~The~~which ~~Offer~~ shall be ~~registered with~~responsible ~~ANBIMA~~for ~~within~~maintaining ~~7 (seven) days from~~ the ~~date~~records of ~~publication of~~ the ~~Offer closing announcement~~Debentures, ~~pursuant to articles 15 and 18 of the~~ ~~"Rules~~among ~~and~~other ~~Procedures~~responsibilities ~~for~~defined ~~Public Offerings", as~~ in ~~force,~~the anregulations ~~integral~~issued ~~part~~by of the ~~"ANBIMA~~CVM ~~Self-Regulation Code for Structuring, Coordination~~ and ~~Distribution of Public Offerings of Securities and Public Takeover Offers", as in force~~B3.3 5.FINAL ~~ESTIMATED~~DISTRIBUTION ~~SCHEDULE~~DATAThe OFfinal ~~OFFER~~distribution ~~STAGES Below~~data ~~is an schedule of the main stages of the Offering: Event(1) Date(2) 1 Submission of electronic application form~~ for the Offer toare ~~the CVM~~shown ~~06/22/2026~~in ~~2 Publication of~~ the ~~Market~~table ~~Notice~~below, ~~06/22/2026~~in 3accordance ~~Bookbuilding~~with ~~Procedure~~Annex ~~07/01/2026~~N ~~4 Publication~~ of ~~market notice regarding the result of the Bookbuilding Procedure 07/01/2026 5 Registration of the Offer with the~~ CVM ~~07/02/2026~~Resolution 6160.Debentures ~~Date~~Investor ofType ~~publication~~Number of ~~this~~Debenture ~~Commencement~~Subscribers ~~Notice~~Number ~~07/02/2026 7 Financial Settlement Date~~ of ~~the~~Subscribed ~~Debentures~~and ~~07/03/2026~~Paid-in 8DebenturesIndividuals1178,242Investment ~~Maximum~~Clubs--Investment ~~date~~Funds572982,008Private ~~for publication of the Closing~~Pension ~~Notice~~Entities--Insurance UpCompanies--Foreign toInvestors--Intermediary ~~180~~Institutions ~~(one~~participating ~~hundred~~in ~~and eighty) days from~~ the ~~publication~~distribution ofconsortium--Financial ~~this Commencement Notice (1) The dates provided for future events~~institutions ~~are~~linked ~~merely indicative and are subject~~ to ~~changes,~~the ~~modifications,~~Issuer ~~suspensions, extensions, delays~~ and ~~anticipations~~consortium ~~without~~participants--Other ~~prior~~Financial ~~notice, at~~Institutions19.750Other ~~the~~legal ~~discretion~~entities oflinked to the Issuer and ~~the Coordinators. Any modification~~ to the ~~distribution schedule must be communicated to the CVM and~~ ~~may~~participants ~~be analyzed as a modification~~ of the ~~Offer,~~consortium--Other ~~following~~legal ~~the provisions of articles 67 and 69 of CVM Resolution 160. Furthermore~~entities--Partners, ~~should changes in circumstances~~administrators, ~~suspension~~employees, ~~extension,~~agents ~~revocation~~and orother ~~modification~~persons ofrelated ~~the Offering occur, such schedule may be altered. (2) Any communications or announcements relating~~ to the ~~Offer~~Issuer and ~~shall be made available on~~ the ~~websites~~participants of the ~~CVM~~consortium--Total6901, B3000,0004 ~~the Issuer and the Coordinators, under the terms provided in article 13 of CVM Resolution 160. 6.~~ ADDITIONAL ~~INFORMATION~~INFORMATIONAdditional ~~Additional~~ information regarding the Issue, the Offer, the distribution and the Debentures may be obtained from the Coordinators or from the CVM. The capitalized terms used in this ~~"Commencement~~ “Closing Notice of the Public Offering for Distribution, under the Automatic Registration Procedure, of Simple Debentures, not Convertible into Shares, of the Unsecured Type, in Single Series, of the 9th (Ninth) Issue of AXIA Energia S.A." (~~"Commencement~~“Closing Notice"), which are not defined herein, shall have the meaning assigned to them in the Issuance Deed. REGISTRATION OF THE PRESENT PUBLIC DISTRIBUTION OFFERING SHALL NOT IMPLY, ON THE PART OF THE CVM, GUARANTEE OF THE TRUTHFULNESS OF THE INFORMATION PROVIDED OR JUDGMENT ON THE QUALITY OF THE ISSUER, AS WELL AS ON THE DEBENTURES TO BE DISTRIBUTED. THE SECURITIES SUBJECT TO THE OFFER ARE PRIMARILY EXPOSED TO THE CREDIT RISK OF THE ISSUER. CAREFULLY READ THE TERMS AND CONDITIONS OF THE ISSUANCE DEED AND THE ISSUER'S REFERENCE FORM BEFORE MAKING YOUR INVESTMENT DECISION, PARTICULARLY THE "RISK FACTORS" SECTIONS OF THE ISSUER'S REFERENCE FORM, TO ASSESS THE RISKS THAT SHOULD BE CONSIDERED BEFORE INVESTING IN THE DEBENTURES. AN INVESTMENT INTENTION COLLECTION PROCEDURE WAS CONDUCTED BY THE COORDINATORS PURSUANT TO ARTICLES 61 AND 62 OF CVM RESOLUTION 160. THE MARKET OFFER IS IRREVOCABLE, BUT MAY BE SUBJECT TO PREVIOUSLY INDICATED CONDITIONS THAT CORRESPOND TO A LEGITIMATE INTEREST OF THE ISSUER AND WHOSE IMPLEMENTATION DOES NOT DEPEND ON DIRECT OR INDIRECT ACTION BY THE ISSUER OR PERSONS LINKED TO IT, PURSUANT TO ARTICLE 58 OF CVM RESOLUTION 160. THE INFORMATION CONTAINED IN THIS COMMENCEMENT NOTICE AND MARKET NOTICES HAS NOT BEEN ANALYZED BY THE CVM, ANBIMA, OR BY ANY SELF-REGULATORY ENTITY. CONSIDERING THAT THE OFFER ISWAS SUBJECT TO THE AUTOMATIC REGISTRATION PROCEDURE FOR DISTRIBUTION, REGISTRATION OF THE OFFER DID NOT REQUIRE PRIOR ANALYSIS BY THE CVM AND ANBIMA. ACCORDINGLY, THE DOCUMENTS RELATING TO THE DEBENTURES AND THE OFFER HAVE NOT BEEN AND SHALL NOT BE SUBJECT TO ~~PRIOR~~ REVIEW BY THE CVM AND/OR ANBIMA, INCLUDING, ~~WITHOUT~~ WITHOUT LIMITATION, THIS ~~COMMENCEMENT~~CLOSING NOTICE AND ALL OTHER OFFER DOCUMENTS. FURTHER INFORMATION ABOUT THE DISTRIBUTION MAY BE OBTAINED FROM THE COORDINATORS AND OTHER INSTITUTIONS PARTICIPATING IN THE DISTRIBUTION CONSORTIUM, OR FROM THE CVM. THE DEBENTURES ~~SHALL~~ARE BE SUBJECT TO RESALE RESTRICTIONS, AS INDICATED IN ARTICLE 86, ITEM I, OF CVM RESOLUTION 160. Rio de Janeiro, July 026, 2026. LEAD ~~COORDINATOR COORDINATORS~~COORDINATORCOORDINATOR

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: July 6, 2026

AXIA Energia S.A.

By:	/S/ Eduardo Haiama
	Eduardo Haiama Vice-President of Finance and Investor Relations

FORWARD-LOOKING STATEMENTS

This document may contain estimates and projections that are not statements of past events but reflect our management’s beliefs and expectations and may constitute forward-looking statements under Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities and Exchange Act of 1934, as amended. The words “believes”, “may”, “can”, “estimates”, “continues”, “anticipates”, “intends”, “expects”, and similar expressions are intended to identify estimates that necessarily involve known and unknown risks and uncertainties. Known risks and uncertainties include, but are not limited to: general economic, regulatory, political, and business conditions in Brazil and abroad; fluctuations in interest rates, inflation, and the value of the Brazilian Real; changes in consumer electricity usage patterns and volumes; competitive conditions; our level of indebtedness; the possibility of receiving payments related to our receivables; changes in rainfall and water levels in reservoirs used to operate our hydroelectric plants; our financing and capital investment plans; existing and future government regulations; and other risks described in our annual report and other documents filed with the CVM and SEC. Estimates and projections refer only to the date they were expressed, and we do not assume any obligation to update any of these estimates or projections due to new information or future events. Future results of the Company’s operations and initiatives may differ from current expectations, and investors should not rely solely on the information contained herein. This material contains calculations that may not reflect precise results due to rounding.

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