Companhia Paranaense De EnergiaBMFBOVESPA: CPLE3

Material Fact 04/26 - Copel Distribuição’s 6th Periodic Rate Review Cycle

· Issued by Companhia Paranaense De Energia




MATERIAL FACT | 04/26 COMPANHIA PARANAENSE DE ENERGIA - COPEL

CNPJ 76.483.817/0001-20 - NIRE 41300036535 - CVM Registration No. 1431 B3 (CPLE3) / NYSE (ELPC) / LATIBEX (XCOPO)

Copel Distribuição's 6th Periodic Rate Review Cycle

Copel ("the Company") hereby informs its shareholders and the market in general that the National Electric Energy Agency ("Aneel"), after evaluating and proposing the rate adjustment under the 6th Periodic Tariff Review ("RTP") cycle, approved, at its 10th Ordinary Public Deliberative Session, held today, the new tariff structure for Copel Distribuição, a wholly-owned subsidiary of the Company, setting the net Regulatory Asset Base ("RAB") at R$ 19,936.2 million, reflecting the recognition of prudent investments made by Copel Distribuição in electric assets over the past five years.

The average effect of the RTP is expected to be 20.51% for consumers, effective as of June 24, 2026, with an average of 21.87% for high-voltage customers and 19.85% for low-voltage customers.

Item

Breakdown of the Rate Adjustment

Adjustment to Parcel B

8.58%

Adjustment of Parcel A and Financial Components*

20.19%

Rate Deferral

-8.26%

Average Effect

20.51%

*Includes the financial components of the current rate review process and adjustments from the previous process, excluding the effect of the R$ 1.3 billion deferral.

The Company also presents the following highlights regarding the rate review process:

Parcel B: consists of return on capital, operating costs, the annual cost of movable and immovable facilities (CAIMI), depreciation, among others, totaling R$ 5,720.9 million. The information below summarizes the components of Parcel B: R$ million

Description

5th RTP Cycle (2021)*

6th RTP Cycle (2026)*

Return on Capital**

R$ 984.4

R$ 2,530.6

Regulatory Depreciation (QRR)***

R$ 438.2

R$ 1,004.6

Operating Costs

R$ 1,464.2

R$ 2,238.3

CAIMI

R$ 241.2

R$ 422.7

UD+ER+OR****

(R$ 275.9)

(R$ 475.3)

*Technical Notes 135/2021 and 100/2026

**Includes compensation from the total net base, special obligations, and the RGR/PLPT balance.

*** Regulatory depreciation rate of 3.73% in 2021, rising to 3.88% in 2026.

**** Demand Overrun, Reactive Surplus, and Other Revenues.

Factor X: set at 0.95% based on potential productivity gains, consistent with market growth, changes in technical and commercial quality indicators, and the trajectory of operating costs. Parcel A: comprises costs related to sector-specific charges, transmission, power generation, and unrecoverable revenues, totaling R$ 12,224.4 million, of which (i) R$ 4,600.7 million relates to sector-specific charges, (ii) R$ 2,441.8 million to transmission costs, (iii) R$ 5,064.3 million to power purchase costs, and (iv) R$ 117.6 million relates to unrecoverable revenues.

The item will be included on the agenda of ANEEL's subsequent regular public meeting for decision ratification.

Curitiba, June 23, 2026

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

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