Energy Co Of Parana

p Book value per share (R$) 8.01 7.78 3.0 Equity-to-Debt Ratio 73.4% 70.6% 4.0 Current Liquidity 1.4 1.5 (6.7) Leverage 2,8x 2,3x +0,5x ¹ Considers net income attributed to shareholders of the parent company Amounts subject to rounding.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

COPEL | 1Q26 | Access link COPEL | 1Q26 | │Summary 1 Consolidated Results 3 1.1 Ebitda 3 1.2 Operating Revenue 4 1.3 Operating costs and expenses 6 1.4 Equity Income Result 8 1.5 Financial Results 8 1.6 Consolidated Net Income 9 1.7 Debt and Leverage 10 2 Investiments 12 3 Copel Geração e Transmissão (GenCo)(Consolidated Result) 13 3.1 Economic and Financial Performance 13 3.1.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

This change stems mainly from the increase in debt service expenses, which totaled an additional R$ 129.2 million (+21.4%), reflecting, above all, the raising of funds to finance the Company’s investments.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

| Change in Recurring Net Income (R$ million) 638.9 576.9 +251.4 -67.7 -48.0 -43.0 -30.7 Recurring 1Q25 Δ Recurring Ebitda Δ Taxes Δ Depreciation Δ Financial Results Δ Others Recurring 1Q26 COPEL | 1Q26 | 9 Summary Results Investments GenCo TradeCo DisCo ESG Others Exhibits 1.7 Debt and Leverage Copel’s total consolidated debt as of March 31, 2026, was R$ 23,340.8 million, a 16.5% increase compared to the amount recorded as of December 31, 2025, of R$ 20,038.9 million.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

| Debt by subsidiary R$ million R$ mil GenCo2 DisCo Others3 Total Total Debt1 7,893.0 11,084.2 4,363.6 23,340.8 Availability 1,575.8 1,793.8 2,514.3 5,883.9 Adjusted Net Debt 6,317.2 9,290.4 1,849.3 17,456.9 Leverage 2,8x Duration (years) 3.5 3.6 5.2 3.7 1 Includes the effect of swaps on debentures.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

As of March 31, 2026, consolidated leverage stood at 2.8x, reflecting net debt of R$ 17,456.9 million — an increase of 0.1x from the 2.7x recorded at the end of 2025.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

Yes _______ No ___X____ RESULTS 1Q26 │ Highlights 1Q26 Operational and Commercial Performance Financial results Shareholder returns Gains from modulation and submarkets, resulting from an efficient commercial strategy Sales: -11.7% 5,275 GWh DisCo's billed grid market grew by +2.1% Significant results in revenue generation, even in the face of a challenging scenario: - GSF: 92.0% - Curtailment: 20.7% - PLD: R$ 359.40/MWh (vs.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

3 Transmission 18 4 Strategy of Commercialization 20 4.1 Business Context 20 4.2 Business Performance 20 5 Copel Distribuição (DisCo) 23 5.1 Economic and Financial Performance 23 5.2 Operation Performance 26 5.2.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

3 Operational data 26 6 ESG performance 29 6.1 ESG in Copel's Strategy 29 6.2 Recents highlights 30 6.3 Indicators 30 6.4 Ratings, Rankings and Indexes 31 7 Other highlights from the period 32 COPEL | 1Q26 | 1 Consolidated Results The consolidated result consist of the combined operations of Copel (Holding), Copel Geração e Transmissão (GenCo), Copel Distribuição (DisCo), Copel Comercialização (TradeCo) and other equity holdings1.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

This result reflects the Company’s ability to consistently generate value, supported by the strength of its assets and the efficient execution of its operational and commercial strategy.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

4 Strategy of Commercialization 4.1 Business Context Copel’s marketing strategy focuses on consistent and sustainable growth, with disciplined capital allocation and active risk management, within an environment of transition and modernization in the Brazilian electricity sector.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

the Annual Tariff Adjustment (RTA) of June 2025, with an average effect of 1.3% on parcel B.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

of R$ 196.0 million (-8.9%) in electricity supply revenue, due mainly to the lower volume sold to eligible consumers by TradeCo (-25.9%) and the effect of periodic rate adjustments that reduced the Energy Tariff - TE by 5.5% in the RTA/2025, partially offset by growth in revenue from subsidies for DisCo tariff discounts.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

a Growth in provisions and reversals (+R$ 15.1 million) due to higher PECLD at DisCo (+R$ 51.3 million), partially offset by a reduction in litigation (-R$ 38.0 million), specifically, civil and administrative (-R$ 22.9 million) and labor (-R$ 6.0 million).

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

These effects were partially offset by a R$ 34.0 million increase in the remuneration and restatement of segment assets and liabilities and a R$ 21.3 million decrease in the monetary restatement of litigation.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

It is important to note that the data may change in the future due to tariff review processes and/or revisions to the parameters used to calculate these revenues by the regulatory agency.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026

by the Annual Tariff Adjustment (RTA) of June 2025, with an average effect of 1.3% on Parcel B.

SEC original ↗Energy Co Of Parana — Earnings release (6-K report)6-KMay 6, 2026