Companhia Paranaense De EnergiaBMFBOVESPA: CPLE3

Notice to Shareholders 04/26 - Confirmation of the dividend payment date

· Issued by Companhia Paranaense De Energia




NOTICE TO SHAREHOLDERS| 04/26 COMPANHIA PARANAENSE DE ENERGIA - COPEL

CNPJ/MF 76.483.817/0001-20 - NIRE 41300036535 - CVM Registration 1431-1 B3 (CPLE3) / NYSE (ELPC) / LATIBEX (XCOPO)

Confirmation of the dividend payment date COMPANHIA PARANAENSE DE ENERGIA - COPEL ("Company") hereby informs its shareholders and the market in general that the dividends declared on December 10, 2025, in the total amount of R$ 1,350,000,000.00 (one billion, three hundred and fifty million Brazilian reais), will be paid on June 30, 2026, as disclosed in the Management's Proposal of the Annual and Extraordinary General Meeting held on this date. The main terms and conditions of the payment are as follows:

DIVIDENDS

Payment date

June 30, 2026

Total amount

R$ 1,350,000,000.00

Dividend per common share (ON)

R$ 0.45453469202

Shareholder position date (inclusive)

December 30, 2025

Ex-dividend date

January 2, 2026

The dividends will be paid to shareholders based on the shareholding position held as of December 30, 2025, in compliance with applicable legal and regulatory provisions.

FORM OF PAYMENT: Payment will be made by credit to the bank account registered with the shareholder's respective custodian agent. Shareholders are therefore advised to ensure that their registration and banking information is duly kept up to date. SERVICE:

Bookkeeping Agent: Banco Itaú (Asset Bookkeeping)

Avenida Brigadeiro Faria Lima, 3,500, 3rd floor, SP ZIP Code: 04538-132

Major Cities and Metropolitan Areas: +55 (11) 3003-9285 (WhatsApp) / Other Regions: 0800 720 9285 Email: preatendimentoescritural@itau-unibanco.com.br

Overseas Custodian Bank: The Bank of New York Mellon 101 Barclay Street, 22ndFloor / New York - NY - 10286 Phone: +1 (212) 815-7118

Email: cassandra.miranda@bnymellon.com

Curitiba, April 23, 2026

Felipe Gutterres

Vice President of Finance and Investor Relations

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

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