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 October, 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____
MATERIAL FACT | 10/25 COMPANHIA PARANAENSE DE ENERGIA – COPEL CNPJ/ME 76.483.817/0001-20 – NIRE 41300036535 – Registro
CVM 1431-1 B3 (CPLE3, CPLE5, CPLE6) NYSE (ELP, ELPC) LATIBEX (XCOP, XCOPO) Closing of the Divestment in the Baixo Iguaçu Hydroelectric
Plant COPEL (“Company”) hereby informs its shareholders and the market in general, in continuation of Material Facts No. 01/25
and 05/25, dated February 21, 2025, and June 30, 2025, respectively, that Copel Geração e Transmissão S.A. (“Copel
GeT”), a wholly-owned subsidiary of the Company, has completed the divestment of the Baixo Iguaçu Hydroelectric Plant to
ENERGO-PRO BRASIL HOLDING S.A., after fulfilling all precedent conditions and obtaining approvals from the competent authorities. The
equity value of the transaction totaled R$ 1,683.3 million. Of this amount, R$ 155.4 million was paid in February 2025; R$ 1,517.9 million
was credited today; and the remaining R$ 10.0 million will be released as soon as certain post-closing steps are completed. The completion
of the transaction highlights the company's agility and efficiency in recycling assets and minority interests, reinforcing its ability
to capture value and generate consistent returns for its shareholders. Curitiba, October 22, 2025 Felipe Gutterres Vice-President of Financial
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 October 22, 2025
| COMPANHIA PARANAENSE DE ENERGIA – COPEL |
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| By: |
/S/
Daniel Pimentel Slaviero
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Daniel Pimentel Slaviero
Chief Executive Officer |
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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.