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 1-14668

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____

Review of optimal capital structure
parameters and update of the Dividend Policy

COPEL (the “Company”) informs its shareholders and the market in general that its Board of Directors (the “Board”) approved, on this date, an update to the parameters that guide its optimal capital structure and its Dividend Policy (the “Policy”), which aims to ensure a balanced and sustainable capital allocation, preserve financial strength, provide returns to shareholders, support investment opportunities, and promote the continuous improvement of customer service.

The capital structure will henceforth consider, in an integrated manner, the following elements:

From	→	To
Financial leverage is 2.8x, measured by net debt/EBITDA		Financial leverage is 2.9x, measured by net debt/EBITDA
tolerance range of 0.3x more (3.1x) or less (2.5x)		tolerance range of 0.3x more (3.2x) or less (2.6x)
Convergence within 24 months to the center of the range (2.8x)		Convergence within 48 months to the center of the range (2.9x)

The annual distribution of earnings continues to be guided by the following financial parameters, calculated at the end of each fiscal year:

The financial leverage defined for the Company's optimal capital structure;

A minimum of 75% of Net Income; and

A minimum payment frequency of 2 times a year.

For more details, access the full Policy on the investor relations website (ri.copel.com).

Curitiba, July 15, 2026

Felipe Gutterres

Vice-President of Finance and Investor Relations

For other 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 15, 2026

COMPANHIA PARANAENSE DE ENERGIA – COPEL

By:	/S/ Daniel Pimentel Slaviero
	Daniel Pimentel Slaviero Chief Executive Officer

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.

ENERGY CO OF PARANA 6-K