PAM 6-K

UNITED STATES

SECURITIES AND EXCHANGECOMMISSION

Washington, D.C.20549

FORM 6-K

REPORT OF FOREIGNISSUERPURSUANT TO RULE 13a-16 OR 15d-16 UNDER

SECURITIES EXCHANGEACT OF 1934

For the month of July,2026

(Commission FileNo. 001-34429),

PAMPA ENERGIA S.A.(PAMPA ENERGY INC.)

Argentina

(Jurisdiction ofincorporation or organization)

Maipú 1C1084ABACity of Buenos AiresArgentina

(Address of principalexecutive offices)

(Indicate by check mark whether the registrant files or will file annual reports under cover of 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___

(If "Yes" is marked, indicate below the file number assigned to the

registrant in connection with Rule 12g3-2(b): 82- .)

This Form 6-K for Pampa Energía S.A. (“Pampa” or the “Company”) contains:

Exhibit1: Letter dated July 31, 2026 entitled “Relevant Event. Termination of the HidroeléctricaLos Nihuiles S.A. concession.”

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 31, 2026

FORWARD-LOOKINGSTATEMENTS

This press release may contain forward-looking statements. These statements are statements that are not historical facts, and are based on management's current view and estimates offuture economic circumstances, industry conditions, company performance and financial results. The words "anticipates", "believes", "estimates", "expects", "plans" and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements regarding the declaration or payment of dividends, the implementation of principal operating and financing strategies and capital expenditure plans, the direction of future operations and the factors or trends affecting financial condition, liquidity or results of operations are examples of forward-looking statements. Such statements reflect the current views of management and are subject to a number of risks and uncertainties. There is no guarantee that the expected events, trends or results will a ctually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations.

City of Buenos Aires, July 31, 2026

BOLSAS Y MERCADOS ARGENTINOS S.A.

COMISIÓN NACIONAL DE VALORES

Ref.: Relevant event. Termination of theHidroeléctrica Los Nihuiles S.A. concession.

Dear Sirs,

I am writing to the Comisión Nacional de Valores and Bolsas y Mercados Argentinos S.A. in my capacity as Head of Market Relations of Pampa Energía S.A. (“Pampa”), with reference to the material events disclosed on June 4, 2024 under ID No. 3209068, on June 11, 2024 under ID No. 3212089, on October 22, 2024 under ID No. 3270211, on January 7, 2025 under ID No. 3302758, and on July 8, 2025, in order to inform that, on July 31, 2026, the transition period contemplated under the Concession Agreement for the Los Nihuiles Hydroelectric System, as extended by Law No. 9,630 and set to expire on that date pursuant to a resolution issued by the Minister of Energy and Environment of the Government of the Province of Mendoza, came to an end.

Within this framework, Hidroeléctrica Los Nihuiles S.A. ("HINISA"), in its capacity as concessionaire, and the Province of Mendoza, in its capacity as grantor and represented by the Minister of Energy and Environment, executed the corresponding Handover Certificate for the Concession Assets.

Such certificate formalizes the delivery of the assets allocated to the concession, in accordance with the applicable contractual and regulatory provisions.

Sincerely,

_____________________________

María Agustina Montes

Head of Market Relations