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, 2025

Commission File Number 1-14668

COMPANHIA PARANAENSE DE ENERGIA

(Exact name of registrant as specified in its charter)

Energy Company of Paraná

(Translation of Registrant's name into English)

José Izidoro Biazetto, 158
81200-240 Curitiba, Paraná
Federative Republic of Brazil
+55 (41) 3331-4011

(Address of principal executive offices)

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____

COMPANHIA PARANAENSE DE ENERGIA - COPEL
CNPJ/ME 76.483.817/0001-20 - NIRE 41300036535 - CVM Registration 1431-1
B3 (CPLE3, CPLE5, CPLE6)
NYSE (ELP, ELPC)
LATIBEX (XCOP, XCOPO)

Copel DIS grid market declines 0.7% in 2Q25.

Year-to-date growth of 1.3%

COPEL (“Company”) hereby presents its shareholders and the market in general the performance of the energy market in the second quarter of 2025.

Distribution

Grid Market

In the second quarter of 2025, electricity consumption in Copel Distribuição's grid market fell 0.7% compared to the same period last year. This decline is mainly due to the milder weather observed this year, which reduced demand in the residential and commercial segments. On the other hand, the industrial segment performed better, helping to offset part of this reduction and demonstrating the strength and resilience of the economy in the area served by Copel. The billed grid market, which includes energy offset by Mini and Micro Distributed Generation (MMGD), fell by 2.6% in the second quarter of 2025.

The following chart shows the electricity consumed by class in Q2 2025:

The following table shows Copel's total energy sales, broken down between Copel DisCo, Copel GenCo, Wind Farms and Copel TradeCo:

Note: Does not consider the energy made available through the MRE (Energy Reallocation Mechanism).

¹ Includes Short-Term Sales Contracts and CBR.

² Negative values ​​mean that there were more purchases than sales.

CCEE: Electric Energy Trading Chamber / CCEAR: Energy Trading Contracts in the Regulated Environment / MCP: Short-Term Market / CER: Reserve Energy Contract / MCSD EN - Compensation Mechanism for New Energy Surpluses and Deficits / MVE - Sale of energy to the free market through the Surplus Sale Mechanism.

Curitiba, July 21, 2025

Felipe Gutterres

Vice-President of Finance and Investor Relations

For further information, please contact the Investor Relations team:
ri@copel.com or (41) 3331-4011

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 21, 2025

FORWARD-LOOKING STATEMENTS

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 of future 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 actually 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.