Earnings release
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avis Financial and Operating Results: ▪ 6.9% growth in injected energy (including distributed generation) in the 3Q26 vs. 3Q25, and 3.9% in 9M26 vs. 9M25; ▪ Controlled operating expenses: +6% in the 3Q26 vs. 3Q25 and +5% in 9M26 vs. 9M25; ▪ EBITDA: growth of +6% for the quarter and +9% year-to-date; ▪ Cash EBITDA: R$ 3.2 billion in the 3Q26 (+12% vs. 3Q25) and R$ 8.9 billion in 9M26 (+9% vs. 9M25) ; ▪ Net Income: R$ 1.2 billion in the 3Q26 (+27% vs. 3Q25) and R$ 3.4 billion in 9M26 (-5% vs. 9M25); ▪ CAPEX of R$ 6.2 billion in 9M26, with R$ 5.7 billion allocated to distribution resulting in a Regulatory Asset Base (RAB) of R$ 48.2 billion; ▪ Net Debt/EBITDA ratio of 3.44x in the 3Q26, vs. 3.41x in the 4Q25; ▪ Closing of the transmission asset transaction with GIC, with a R$1.7 billion cash inflow; ▪ Tariff adjustment for Neoenergia Elektro with a +2.36% variation in Parcel B effective August 27, 2026; ▪ Tariff review for Neoenergia Brasília with an average consumer impact of 1.92%, recognition of BRR of R$ 2.2 billion and Parcel B of R$ 820 million (+14.4% vs. the figure observed over the last 12 months). Gross Margin 4,525 4,556 (1%) 14,168 13,913 2% Operating Expenses (1,151) (1,082) 6% (3,405) (3,244) 5% EBITDA 3,576 3,388 6% 11,227 10,316 9% Financial Income (Loss) (1,413) (1,512) (7%) (4,870) (4,448) 9% Profit assigned to controlling shareholders 1,177 924 27% 3,361 3,556 (5%) Financial Asset (Concession) 7 276 (97%) 1,022 1,382 (26%) IFRS 15 + Corporate Operations 419 308 36% 1,303 754 73% Cash EBITDA 3,150 2,804 12% 8,902 8,180 9% Total Injected Energy (GWh) (SIN + Isolated Systems + DG) 22,857 21,372 6.9% 68,882 66,326 3.9% Total Distributed Energy (captive + free market + DG) 19,623 18,508 6.0% 59,000 57,270 3.0% Number of Customers (thousand) 17,248 16,917 2.0% Net Debt¹/EBITDA² 3.44 3.41 0.03 Corporate Rating (S&P) AAA AAA - ¹ Net Debt of cash and cash equivalents, short-term investments and securities. ² EBITDA 12 months ∆ % Financial Debt Indicators 3Q26 2025 Variation HIGHLIGHTS (R$ MN) 3Q26 3Q26 3Q25 ∆ % 9M26 9M25 OPERATING INDICATORS Rio de Janeiro, October 20, 2026 – Today, Neoenergia discloses its results for the third quarter and first nine months of 2026 (3Q26 and 9M26)
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SUMMARY 1. OPERATING PERFORMANCE 3 1.1. Networks 3 1.2. Generation and Customers 12 1.2.1. Renewables 12 1.2.2. Thermal Plant 14 2. ECONOMIC-FINANCIAL PERFORMANCE 15 2.1. Consolidated 15 2.2. Networks 16 2.3. Generation and Customers 24 3. EBITDA 26 4. FINANCIAL RESULT 27 5. INVESTMENTS 27 5.1. Networks 28 5.2. Generation and Customers 28 6. INDEBTEDNESS 28 6.1. Debt Situation and Financial Leverage 28 6.2. Debt amortization schedule 29 6.3. Debt profile 30 7. RATING 31 8. ESG 31 9. OTHER MATTERS 33 9.1. Low-Income Customers 33 9.2. Neoenergia Elektro Adjustment 33 9.3. Closing of Transmission Assets Transaction 34 9.4. Neoenergia Brasília Tariff Review 34 10. RECONCILIATION NOTE 35 ANNEX I – Management DREs by Business 36 ANNEX II – Balance Sheet by Business 37 ANNEX III – Consolidated Cash Flow 38
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 3 1. OPERATING PERFORMANCE The Neoenergia Group's businesses are shown in this report on a managerial basis as follows: (i) Networks – distribution and transmission; and (ii) Generation and Customers – wind, hydroelectric, solar, and thermal generation, and energy sales. 1.1. Networks 1.1.1. Distributors 1.1.1.1. Number of Consumers The Neoenergia distributors ended the 3Q26 with 17.2 million active consumers (+2.0% vs. 3Q25), as displayed in the table below: 1.1.1.2. Market Evolution Distributed energy (captive + free + DG) reached 19,623 GWh in the 3Q26 (+6.0% vs. 3 Q25) and 59,000 GWh in 9M26 (+3.0% vs. 9M25), due to higher temperatures in the quarter and the increase of customer base. Below are the figures of distributed energy by distributor, client type, and market: Consolidado Consolidado Consolidado Residential 15,447 6,327 3,883 1,469 2,664 1,104 15,118 6,179 3,804 1,439 2,627 1,069 330 148 80 30 38 35 Industrial 39 10 6 2 20 1 38 10 6 2 19 1 1 (0) 0 0 1 (0) Commercial 1,124 445 228 116 213 122 1,116 442 227 114 212 120 8 2 0 1 1 2 Rural 458 168 110 45 125 10 469 173 115 46 126 10 (11) (5) (4) (1) (1) 0 Other 180 73 35 30 35 6 177 72 35 30 34 6 3 1 0 1 1 0 Total 17,248 7,023 4,262 1,661 3,058 1,244 16,917 6,876 4,186 1,630 3,018 1,207 330 147 76 31 40 37 Number of Customers (thousand) 3Q26 3Q25 VARIATION
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 4 Residential 1,960 1,859 5.4% 1,410 1,341 5.2% 567 560 1.2% 1,290 1,251 3.1% 679 638 6.4% 5,905 5,649 4.5% Industrial 44 67 (34.2%) 34 44 (21.5%) 14 21 (32.0%) 81 93 (12.4%) 4 5 (16.2%) 178 229 (22.4%) Commercial 435 474 (8.2%) 277 307 (9.8%) 124 136 (8.8%) 324 346 (6.4%) 262 270 (2.9%) 1,422 1,533 (7.2%) Rural 922 728 26.7% 107 108 (0.2%) 73 87 (16.4%) 158 188 (15.6%) 32 36 (11.3%) 1,293 1,146 12.8% Other 569 558 2.0% 326 326 0.1% 151 155 (2.5%) 234 252 (7.1%) 197 211 (6.5%) 1,478 1,502 (1.6%) Captive Market 3,930 3,686 6.6% 2,155 2,125 1.4% 929 959 (3.1%) 2,088 2,130 (2.0%) 1,174 1,159 1.3% 10,276 10,059 2.2% Industrial 1,284 1,234 4.0% 740 736 0.6% 359 330 9.1% 2,027 1,978 2.5% 156 155 0.4% 4,567 4,433 3.0% Commercial 451 402 12.2% 425 375 13.1% 126 111 13.7% 369 319 15.7% 262 226 16.2% 1,634 1,433 14.0% Rural 32 17 95.2% 21 17 24.4% 13 11 15.2% 77 64 19.9% 2 1 48.7% 145 110 31.8% Other 236 214 10.2% 136 130 5.0% 51 46 11.0% 221 199 11.0% 60 51 17.0% 705 641 10.0% Supply 0 0 - 63 59 7.1% 0 0 - 0 0 - 69 47 48.3% 133 106 25.1% Free Market + Supply 2,004 1,867 7.3% 1,386 1,317 5.2% 550 498 10.4% 2,694 2,561 5.2% 549 480 14.4% 7,183 6,724 6.8% Residential 435 289 50.4% 298 209 42.6% 197 150 31.3% 164 121 35.5% 53 44 22.0% 1,147 813 41.1% Industrial 18 18 0.4% 25 24 2.3% 8 7 4.4% 17 16 10.4% 2 2 (18.6%) 69 67 3.1% Commercial 266 209 27.2% 181 169 7.3% 101 91 11.6% 134 113 18.9% 99 101 (1.0%) 781 681 14.6% Rural 54 52 2.8% 24 21 11.9% 14 13 11.8% 44 46 (4.7%) 5 6 (18.5%) 141 138 1.6% Other 5 7 (24.8%) 6 6 (4.7%) 5 3 56.6% 8 7 11.0% 2 2 (21.6%) 26 26 (0.1%) DG Compensation Energy 778 575 35.2% 533 429 24.2% 324 263 23.1% 367 303 21.3% 162 155 4.2% 2,164 1,726 25.4% Residential 2,395 2,149 11.5% 1,708 1,550 10.2% 763 710 7.6% 1,453 1,371 6.0% 732 682 7.4% 7,052 6,462 9.1% Industrial 1,346 1,319 2.0% 800 804 (0.5%) 381 358 6.6% 2,125 2,087 1.8% 162 163 (0.3%) 4,814 4,729 1.8% Commercial 1,152 1,084 6.2% 882 851 3.7% 352 338 4.0% 827 778 6.3% 624 596 4.6% 3,837 3,647 5.2% Rural 1,009 797 26.6% 152 146 4.4% 100 111 (10.1%) 279 298 (6.3%) 39 43 (10.3%) 1,579 1,395 13.2% Other 811 780 4.0% 468 462 1.4% 207 204 1.5% 463 459 1.1% 259 265 (2.1%) 2,209 2,169 1.9% Supply 0 0 - 63 59 7.1% 0 0 - 0 0 - 69 47 48.3% 133 106 25.1% Total Distributed Energy (captive + free market + DG) 6,712 6,128 9.5% 4,074 3,871 5.2% 1,804 1,721 4.8% 5,149 4,993 3.1% 1,885 1,795 5.0% 19,623 18,508 6.0% % Distributed Energy (GWh) COELBA CELPE 3Q26 3Q25 % 3Q26 3Q25 3Q26 ELEKTRO CONSOLIDADO 3Q26 3Q25 % 3Q25 % COSERN ELEKTRO 3Q26 3Q25 % 3Q26 3Q25 % Residential 6,105 6,011 1.6% 4,438 4,389 1.1% 1,774 1,803 (1.6%) 4,199 4,141 1.4% 1,967 1,919 2.5% 18,482 18,263 1.2% Industrial 142 192 (25.9%) 110 143 (23.3%) 45 64 (30.3%) 248 310 (19.9%) 12 11 5.4% 556 720 (22.7%) Commercial 1,433 1,633 (12.2%) 900 1,003 (10.3%) 395 445 (11.3%) 1,104 1,225 (9.8%) 761 837 (9.1%) 4,594 5,144 (10.7%) Rural 2,095 1,966 6.6% 323 336 (3.8%) 225 251 (10.5%) 501 569 (12.0%) 75 86 (12.4%) 3,219 3,208 0.3% Other 1,725 1,726 (0.0%) 995 1,021 (2.6%) 452 468 (3.4%) 757 836 (9.3%) 590 711 (17.1%) 4,520 4,762 (5.1%) Captive Market 11,500 11,527 (0.2%) 6,765 6,892 (1.8%) 2,891 3,032 (4.6%) 6,810 7,081 (3.8%) 3,404 3,565 (4.5%) 31,371 32,097 (2.3%) Industrial 3,778 3,629 4.1% 2,167 2,158 0.4% 1,022 954 7.2% 5,887 5,816 1.2% 440 428 2.6% 13,294 12,986 2.4% Commercial 1,401 1,271 10.2% 1,291 1,160 11.3% 378 337 12.3% 1,198 1,082 10.7% 780 671 16.2% 5,048 4,521 11.7% Rural 72 52 38.2% 57 48 19.0% 39 32 20.2% 233 189 23.7% 6 4 48.1% 409 326 25.3% Other 712 670 6.3% 410 391 5.0% 150 136 10.7% 633 572 10.7% 174 160 9.1% 2,080 1,928 7.9% Supply 0 0 0.2% 194 189 2.8% 1 1 (0.7%) 0 0 - 111 100 10.9% 307 291 5.6% Free Market + Supply 5,964 5,623 6.1% 4,119 3,946 4.4% 1,591 1,460 9.0% 7,951 7,658 3.8% 1,511 1,364 10.8% 21,137 20,051 5.4% Residential 1,284 916 40.3% 883 632 39.8% 586 442 32.4% 521 392 32.9% 149 119 25.0% 3,423 2,501 36.9% Industrial 53 53 0.8% 74 73 2.0% 24 22 8.3% 54 48 12.8% 6 7 (16.7%) 211 202 4.3% Commercial 791 617 28.2% 550 478 14.9% 313 264 18.7% 413 346 19.3% 271 272 (0.3%) 2,338 1,977 18.2% Rural 178 140 26.5% 69 61 13.9% 38 33 18.1% 139 124 12.1% 14 16 (11.8%) 438 374 17.3% Other 18 14 30.0% 19 16 23.9% 14 8 73.0% 24 22 9.4% 5 8 (32.0%) 81 67 20.2% DG Compensation Energy 2,324 1,740 33.6% 1,595 1,259 26.7% 976 769 26.8% 1,151 932 23.5% 445 422 5.5% 6,492 5,122 26.7% Residential 7,389 6,927 6.7% 5,321 5,020 6.0% 2,360 2,245 5.1% 4,720 4,533 4.1% 2,116 2,039 3.8% 21,905 20,764 5.5% Industrial 3,973 3,874 2.6% 2,350 2,374 (1.0%) 1,091 1,040 4.9% 6,190 6,174 0.3% 457 446 2.4% 14,061 13,908 1.1% Commercial 3,625 3,520 3.0% 2,741 2,642 3.7% 1,087 1,046 3.9% 2,715 2,653 2.4% 1,812 1,781 1.8% 11,980 11,642 2.9% Rural 2,346 2,159 8.7% 450 445 1.1% 302 317 (4.4%) 873 882 (1.0%) 96 106 (9.8%) 4,066 3,908 4.1% Other 2,456 2,410 1.9% 1,425 1,428 (0.2%) 617 612 0.8% 1,414 1,429 (1.0%) 769 879 (12.5%) 6,681 6,758 (1.1%) Supply 0 0 - 194 189 2.8% 1 1 - 0 0 - 111 100 10.9% 307 291 5.6% Total Distributed Energy (captive + free market + DG) 19,788 18,890 4.8% 12,480 12,097 3.2% 5,458 5,261 3.7% 15,912 15,670 1.5% 5,361 5,351 0.2% 59,000 57,270 3.0% % 9M26 ELEKTRO % 9M26 9M25 % 9M26 9M25 %9M26 9M25 % 9M26 9M25 Distributed Energy (GWh) COELBA CELPE COSERN ELEKTRO 9M25 % 9M26 9M25 CONSOLIDADO
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 5 NOTE: The 2026 distributed generation (DG) balancing energy data are estimates, as the calculation date falls after the publication period of this report. The 2025 data have been adjusted to reflect the final calculation. Total residential consumption amounted to 7,052 GWh in the 3Q26 (+9.1% vs. 3Q25) and 21,905 GWh in 9M26 (+5.5% vs. 9M25), showing an increase across all five distributors due to higher temperatures during the quarter and growth in the customer base. Industrial sector consumption grew by 1.8% vs. the 3Q25, notably driven by growth at Neoenergia Cosern (+6.6%) and Neoenergia Coelba (+2.0%). Year -to-date growth was 1.1% vs. 9M25, with increases at Neoenergia Cosern (+4.9%), Neoenergia Coelba (+2.6%), Neoenergia Brasília (+2.4%), and Neoenergia Elektro (+ 0.3%), partially offset by a reduction at Neoenergia Pernambuco (-1.0%). The commercial class totaled 3,837 GWh in the 3Q26 (+5.2% vs. 3Q25) and 11,980 GWh in 9M26 (+2.9% vs. 9M25), also influenced by higher temperatures during the quarter. The rural class ended the quarter with a consumption of 1,579 GWh (+13.2% vs. 3Q25) and 4,066 GWh in 9M26 (+4.1% vs. 9M25), driven by higher demand for irrigation. The other sectors (public services, public administration, streetlights, and own use) totaled 2,209 GWh in consumption (+1.9% vs. the 3Q25) and 6,681 GWh in 9M26 (-1.1% vs. 9M25). 1.1.1.3. Energy Balance Total injected energy , including DG, amounted to 22,857 GWh in the 3Q26 (+6.9% vs. 3Q25) and 68,882 GWh in 9M26 (+3.9% vs. 9M25). Dif % Dif %9M26 9M25 9M26 x 9M25ENERGY BALANCE (GWh) 3Q26 3Q25 3Q26 x 3Q25 CONSOLIDATED Captive Market 10,276 10,059 217 2.2% 31,371 32,097 (726) (2.3%) Free Market + Supply 7,183 6,724 460 6.8% 21,137 20,051 1,086 5.4% Distributed Energy (A) 17,459 16,782 677 4.0% 52,508 52,147 361 0.7% Lost Energy (B) 2,495 2,245 250 11.1% 7,988 7,771 216 2.8% Non-billed (C) 76 (11) 87 N/A 47 (177) 224 N/A SIN + Isolated Systems (D) = (A) + (B) + (C) 20,030 19,016 1,014 5.3% 60,543 59,743 800 1.3% DG Injected Energy (E) 2,827 2,357 470 20.0% 8,339 6,583 1,756 26.7% TOTAL INJECTED ENERGY (F) = (D) + (E) 22,857 21,372 1,484 6.9% 68,882 66,326 2,557 3.9%
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 6 Dif % Dif %9M26 9M25 9M26 x 9M25ENERGY BALANCE (GWh) 3Q26 3Q25 3Q26 x 3Q25 3Q26 3Q25 9M26 9M25 Captive Market 3,930 3,686 245 6.6% 11,500 11,527 (27) (0.2%) Free Market + Supply 2,004 1,867 137 7.3% 5,964 5,623 341 6.1% Distributed Energy (A) 5,934 5,553 381 6.9% 17,464 17,150 314 1.8% Lost Energy (B) 999 931 69 7.4% 3,269 3,202 66 2.1% Non-billed (C) (9) (48) 39 (81.8%) 105 (25) 130 N/A SIN + Isolated Systems (D) = (A) + (B) + (C) 6,925 6,436 489 7.6% 20,838 20,327 510 2.5% DG Injected Energy (E) 1,043 817 225 27.6% 3,062 2,268 794 35.0% TOTAL INJECTED ENERGY (F) = (D) + (E) 7,967 7,253 714 9.9% 23,900 22,595 1,304 5.8% 3Q26 3Q25 9M26 9M25 Captive Market 2,155 2,125 30 1.4% 6,765 6,892 (127) (1.8%) Free Market + Supply 1,386 1,317 69 5.2% 4,119 3,946 173 4.4% Distributed Energy (A) 3,540 3,442 99 2.9% 10,885 10,838 46 0.4% Lost Energy (B) 782 739 43 5.9% 2,533 2,496 37 1.5% Non-billed (C) (14) (91) 77 (84.6%) (46) (127) 81 (64%) SIN + Isolated Systems (D) = (A) + (B) + (C) 4,309 4,089 219 5.4% 13,372 13,207 164 1.2% DG Injected Energy (E) 667 533 133 25.0% 1,979 1,560 418 26.8% TOTAL INJECTED ENERGY (F) = (D) + (E) 4,975 4,622 353 7.6% 15,350 14,767 583 3.9% 3Q26 3Q25 9M26 9M25 Captive Market 929 959 (30) (3.1%) 2,891 3,032 (141) (4.6%) Free Market + Supply 550 498 52 10.4% 1,591 1,460 131 9.0% Distributed Energy (A) 1,479 1,458 22 1.5% 4,483 4,492 (9) (0.2%) Lost Energy (B) 114 118 (4) (3.2%) 350 373 (23) (6.3%) Non-billed (C) 19 (23) 43 N/A (16) (52) 36 (68%) SIN + Isolated Systems (D) = (A) + (B) + (C) 1,613 1,552 61 3.9% 4,816 4,813 3 0.1% DG Injected Energy (E) 438 352 86 24.5% 1,298 962 336 34.9% TOTAL INJECTED ENERGY (F) = (D) + (E) 2,051 1,904 147 7.7% 6,114 5,775 339 5.9%
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 7 NOTE: Distributed Energy figures do not include distributed generation (DG) balancing energy. The 2026 data for energy injected via DG are estimates, as the final calculation occurs after the publication date of this report. The 2025 data have been adjusted to reflect the final figures. 1.1.1.4. Losses Energy losses are monitored by using a percentage index that calculates the ratio between injected energy and billed energy, accumulated over a 12 -month period. Based on this methodology, we show below the indicator's evolution and a comparison with the tariff coverage. Dif % Dif %9M26 9M25 9M26 x 9M25ENERGY BALANCE (GWh) 3Q26 3Q25 3Q26 x 3Q25 3Q26 3Q25 9M26 9M25 Captive Market 2,088 2,130 (42) (2.0%) 6,810 7,081 (271) (3.8%) Free Market + Supply 2,694 2,561 133 5.2% 7,951 7,658 293 3.8% Distributed Energy (A) 4,782 4,690 92 2.0% 14,761 14,739 23 0.2% Lost Energy (B) 326 238 87 36.7% 1,059 1,011 48 4.8% Non-billed (C) 70 117 (47) (39.9%) (43) (15) (28) 186% SIN + Isolated Systems (D) = (A) + (B) + (C) 5,178 5,045 132 2.6% 15,778 15,734 43 0.3% DG Injected Energy (E) 488 440 47 10.8% 1,488 1,239 249 20.1% TOTAL INJECTED ENERGY (F) = (D) + (E) 5,665 5,486 180 3.3% 17,266 16,974 292 1.7% 3Q26 3Q25 9M26 9M25 Captive Market 1,174 1,159 15 1.3% 3,404 3,565 (160) (4.5%) Free Market + Supply 549 480 69 14.4% 1,511 1,364 147 10.8% Distributed Energy (A) 1,723 1,640 84 5.1% 4,916 4,929 (13) (0.3%) Lost Energy (B) 273 219 54 24.8% 777 689 87 12.7% Non-billed (C) 9 34 (25) (73.9%) 48 42 6 13% SIN + Isolated Systems (D) = (A) + (B) + (C) 2,006 1,893 113 6.0% 5,740 5,660 80 1.4% DG Injected Energy (E) 192 214 (22) (10.4%) 512 553 (41) (7.4%) TOTAL INJECTED ENERGY (F) = (D) + (E) 2,198 2,107 90 4.3% 6,252 6,214 39 0.6%
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 8 NOTES: (1) Due to the fact that the period for calculating the September 2026 loss indicator falls after the date of disclosure of this report, data presented are estimates . The 2025 indicators were adjusted for the final calculation. (2) Regulatory Limit: 12 months Neoenergia Coelba reported total 12-month losses of 15.90% in the 3Q26, below its regulatory limit of 16.86%. At Neoenergia Pernambuco, the indicator ended the 3Q26 at 18.80%, above its regulatory threshold of 17.72%. Meanwhile, Neoenergia Cosern ended the 3Q26 at 7.30%, remaining below its regulatory limit of 11.42%. The same applied to Neoenergia Elektro, which ended the period at 6.43%, also below the regulatory limit of 8.38%. Finally, Neoenergia Brasília recorded total 12-month losses of 13.85% in the 3Q26, above the regulatory limit of 12.21%. During 9M26, the following loss-reduction measures were implemented across the five distribution companies: i. Conducting over 164 thousand inspections, recovering more than 168 GWh; ii. Replacing over 233,000 obsolete meters with more modern equipment; iii. Regularizing the status of over 146,000 illegal connections; and iv. Surveying and inspecting streetlights, recovering more than 22 GWh. 1.1.1.5. Collection and Delinquency The collection rate reflects customers’ ability to pay and the effectiveness of the Company’s collection actions. Below is the year-to-date result of the past 12 months of collection, and a comparison with previous years: 3Q25 4Q25 1Q26 2Q26 3Q26 3Q25 4Q25 1Q26 2Q26 3Q26 3Q25 4Q25 1Q26 2Q26 3Q26 Aneel 26 Check 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 3Q25 4Q25 1Q26 2Q26 3Q26 3Q25 4Q25 1Q26 2Q26 3Q26 3Q25 4Q25 1Q26 2Q26 3Q26 Aneel 26 4,208 4,122 4,3092,997 1,749 584 1,289 645 1,415 1,609 1,562 1,591 1,627 (110) 71 82 (45) 65 425 465 463 426 1,042 DISCOS Losses 12 months (%) Technical Loss Non-Technical Loss Total Losses 15.48% 15.21% 15.80% 16.86%4.98% 15.85%10.80% 5.10% 15.90%4.98% 4.61% 4.35% 9.46% 9.59% 9.62% 10.87% 10.87% 10.85% 10.83% 17.72%9.71% 8.91% 8.67% 8.92% 8.65%9.74% 7.08% 7.14% 6.64% 11.42%9.00% 9.06% (1.70%) 18.80% 7.30% 18.37% 18.26% 18.54% 18.36% 5.99% 6.05% 6.06% (1.07%) (1.77%) (1.93%) (2.44%) 7.48%8.54% 8.85% 9.07% 9.08% 6.29%6.12% 0.31% 8.38%6.20% 0.30% 0.36% (0.22%) 0.07% 12.77% 12.72% 13.68% 12.21%8.35% 5.50% 6.43% 13.85% 6.41% 5.84% 6.27% DISCOS Total Losses 12 months (GWh) Technical Loss Non-Technical Loss Total Losses 4.02% 4.38% 4.36% 5.30% 12.44%8.41% 8.40% 8.36% 8.38% 5,095 1,691 1,705 1,716 1,723 1,352 1,246 1,180 1,358 4,3202,968 2,962 2,941 2,952 3,300 3,267 3,307 3,257 3,3511,535 4,413 3,376 891 1,264 1,271 1,260 1,298 (57) (109) (125) (157) 500557 574 588 583 1,313 2,01515 474 1,355 979946 967975 1,2151,3531,335 640 643 636 638 306 332 331 404 1,071
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 9 The consolidated collection rate in the 3Q26 remains high, reaching 97.52%. 97.79%98.00%98.12% 3Q262Q263Q25 96.84%96.50% 98.07% 3Q262Q263Q25 97.98%98.23% 99.05% 3Q262Q263Q25 (0.21 p.p.) +0.34 p.p. (0.25 p.p.) 98.19%98.34%98.85% 3Q262Q263Q25 (0.15 p.p.) 96.08%96.62%97.58% 3Q262Q263Q25 (0.54 p.p.) 97.52%97.64%98.31% 3Q262Q263Q25 (0.12 p.p.)
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 10 NOTE: PECLD considers the amount accrued + restatement. In the third quarter of 2026 (3Q26), several collection measures were implemented across the five distribution companies to reduce delinquency rates and, consequently, improve revenue collection. Key measures included: i. Carrying out 703,000 service disconnections by targeting georeferenced clusters —mapping the locations of customers with the highest delinquency rates to optimize operations; ii. Reporting 3.8 million consumers to credit bureaus; iii. Formally protesting over 438,000 debt instruments via public registries and issuing formal notices; iv. Outsourcing 14.8 million collection actions to third-party collection agencies; v. Systematic initiatives targeting large customers and negotiations with public administration; vi. Deploying new technologies to enable the payment of energy bills via debit or credit card; vii. Conducting negotiations for 368,000 consumers via the digital platform; viii. Notifying 66 million customers via WhatsApp; 3Q25 4Q25 1Q26 2Q26 3Q26 Regulatory Limit 3Q26 9M26 9M26 Regulatory Limit Gross Revenue 3,828 4,248 4,042 4,268 4,147 4,147 12,458 12,458 PECLD 42 60 51 46 39 54 136 161 Delinquency 1.10% 1.41% 1.25% 1.08% 0.95% 1.31% 1.09% 1.29% Gross Revenue 2,203 2,556 2,461 2,378 2,373 2,373 7,213 7,213 4 PECLD 50 50 62 55 56 36 173 111 Delinquency 2.27% 1.97% 2.50% 2.33% 2.36% 1.52% 2.40% 1.54% Gross Revenue 1,023 1,249 1,334 749 1,071 1,071 3,154 3,154 PECLD 4 5 8 8 9 5 25 16 Delinquency 0.38% 0.38% 0.60% 1.07% 0.84% 0.50% 0.79% 0.52% Gross Revenue 2,836 3,271 3,283 2,998 3,044 3,044 9,325 9,325 PECLD 16 28 23 15 23 19 61 58 Delinquency 0.57% 0.86% 0.71% 0.51% 0.75% 0.63% 0.66% 0.63% Gross Revenue 1,314 1,447 1,337 1,275 1,416 1,416 4,028 4,028 PECLD 14 13 13 12 18 8 43 24 Delinquency 1.04% 0.90% 0.99% 0.92% 1.27% 0.60% 1.07% 0.60% PECLD / GROSS REVENUE
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 11 1.1.1.6. DEC and FEC (12 months) The quality of the energy supply is monitored mainly by the indicators DEC – Equivalent Duration of Interruption per Consumer and FEC – Equivalent Frequency of Interruption per Consumer , which measure failures occurring in the distribution network. Neoenergia's 5 distributors remain below the regulatory limits for DEC and FEC. NOTE: 12-month indicator without supplier. Because the disclosure period for calculating quality indicators falls later than the publication date of this report, the data showed are estimates. The 2025 indicators were adjusted for the final calculation 1.1.2. Transmission lines At the end of the 3Q26, our portfolio comprised 18 transmission assets as shown in the table below: NOTE: Afluente T arises from the deverticalization process of Neoenergia Coelba. ¹ Narandiba comprises 3 substations: SE Narandiba, SE Extremoz II and SE Brumado II. ² Own substations ³ Ratified RAP (2026-2027 cycle) On September 30, 2026, with the closing of the transaction with GIC, Neoenergia acquired a 51% stake in the total share capital of Neoenergia Transmissão—and, consequently, control of the company—having previously shared control since 3Q26 3Q25 ∆ % Regulatory Limit 3Q26 3Q25 ∆ % Regulatory Limit 9.49 9.17 3% 11.47 3.90 3.68 6% 5.94 10.26 10.40 (1%) 11.37 4.20 4.32 (3%) 6.70 6.30 6.22 1% 9.39 2.68 2.94 (9%) 5.46 6.16 6.46 (5%) 7.30 3.38 3.56 (5%) 5.04 5.82 6.10 (5%) 6.12 3.71 4.18 (11%) 4.09 DEC (hours) FEC (times) Auction Lot Neoenergia share Location Extension (Km) Substation² RAP³ (R$ MN) - - 100% BA 483 3 substations 78 Auction Jun'08 E Narandiba¹ BA - 1 substation 18 Auction Jun'11 G Extremoz II¹ BA - - 6 Auction May'12 D Brumado II¹ RN - - 12 Auction Jan'13 G 51% RN/PB 190 - 38 4 51% MS 583 1 substation 102 20 51% SP - - 21 22 51% SC - - 21 27 51% CE - - 19 4 51% BA/TO/PI/MA 728 - 194 6 51% CE/PB 346 1 substation 88 1 51% SC/PR 654 4 substations 291 2 51% RJ 647 2 substations 182 3 51% RJ/MG/ES 445 - 104 14 100% RS/SC 488 - 181 Auction Dec'19 9 51% BA 202 1 substation 26 Auction Dec'20 2 51% BA/MG/ES 1,039 1 substation 252 Auction Dec'21 4 51% MG - - 48 11 51% MS 281 1 substation 48 2 51% SP/MG 1,553 1 substation 453 Paraíso Santa Luzia Vale do Itajaí Itabapoana Rio Formoso Estreito Asset 51% Afluente T Narandiba 1 Potiguar Sul Auction Jun'22 Auction Apr'17 Dourados Atibaia Biguaçu Sobral Alto Paranaiba Auction Dec'17 Auction Dec'18 Lagoa dos Patos Guanabara Morro do Chapéu Jalapão
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 12 September 2023 with Unique Power and Warrington Investment Pte. Ltd. (a GIC investment vehicle). As part of the transaction, Neoenergia Transmissão acquired full ownership of the transmission companies Guanabara, Vale do Itajaí, Potiguar Sul, Morro do Chapéu, Estreito, Alto Paranaíba, and Neoenergia Paraíso. Regarding Lot 14 from the December 2018 auction (Lagoa dos Patos), 64% of the Permitted Annual Revenue (RAP) has been released; the remainder, concerning Section 1, is currently the subject of legal proceedings. 1.2. Generation and Customers 1.2.1. Renewables At the end of 3Q26, Neoenergia’s installed renewable capacity stood at 3,384.6 MW¹: ¹Does not include the 25% indirect interest in the Dardanelos HPP (classified as a financial asset) or the installed modules of the Noronha Verde project (11.3 MW of solar capacity and 10.6 MW of battery storage). 1.2.1.1. Wind Farms and Solar Parks The company has 44 wind farms in operation , with an installed capacity of 1,554 MW and 2 solar parks (Solar Luzia Complex), with an installed capacity of 149 MWp: 1,553.5 MW 1,681.8 MW 149.3 MWp Installed Capacity Wind Hydro Solar 3,384.6 MW
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 13 EOL Caetité 1 100% BA Caetité 30.0 13.0 10/29/2012 10/28/2042 EOL Caetité 2 100% BA Caetité 30.0 14.7 2/7/2011 2/6/2046 EOL Caetité 3 100% BA Caetité 30.0 11.2 2/24/2011 2/23/2046 EOL Calango 1 100% RN Bodó e Santana do Mato 30.0 13.9 4/28/2011 4/27/2046 EOL Calango 3 100% RN Bodó, Santana do Mato e Lagoa Nova 30.0 13.9 5/30/2011 5/29/2046 EOL Rio do Fogo (ENERBRASIL) 100% RN Rio do Fogo 49.3 17.9 12/19/2001 12/18/2031 EOL Arizona 1 100% RN Rio do Fogo 28.0 12.9 3/4/2011 3/3/2046 EOL Mel 2 100% RN Areia Branca 20.0 8.8 2/28/2011 2/27/2046 EOL Calango 6 100% RN Bodó e Cerro Corá 30.0 18.5 11/20/2014 11/19/2049 EOL Santana 1 100% RN Bodó, Lagoa Nova e Cerro Corá 30.0 17.3 11/14/2014 11/13/2049 EOL Santana 2 100% RN Bodó e Lagoa Nova 24.0 13.1 11/14/2014 11/13/2049 EOL Calango 2 100% RN Bodó 30.0 12.8 5/9/2011 5/8/2046 EOL Calango 4 100% RN Bodó 30.0 13.5 5/19/2011 5/18/2046 EOL Calango 5 100% RN Bodó 30.0 13.7 6/2/2011 6/1/2046 EOL Canoas 100% PB São José do Sabugi e Junco do Seridó 31.5 17.7 8/4/2015 8/3/2050 EOL Lagoa 2 100% PB São José do Sabugi e Santa Luzia 31.5 15.6 8/4/2015 8/3/2050 EOL Lagoa 1 100% PB São José do Sabugi e Santa Luzia 31.5 16.3 8/4/2015 8/3/2050 Chafariz Complex 99.5% PB São José do Sabugi, Santa Luzia, Areia de Baraúnas e São Mamede 471.2 232.9 Between 06/21/2018 and 02/05/2019 Between 06/20/2053 and 02/04/2054 Chafariz 1 100% PB Santa Luzia 34.7 18.2 6/21/2018 6/20/2053 Chafariz 2 100% PB Santa Luzia 34.7 17.4 6/21/2018 6/20/2053 Chafariz 3 100% PB Santa Luzia 34.7 17.8 6/21/2018 6/20/2053 Chafariz 4 100% PB Santa Luzia e Areia de Baraúnas 34.7 17.8 2/5/2019 2/4/2054 Chafariz 5 100% PB Santa Luzia 34.7 16.6 2/5/2019 2/4/2054 Chafariz 6 100% PB Santa Luzia 31.2 15.2 6/21/2018 6/20/2053 Chafariz 7 100% PB Santa Luzia 34.7 18.3 6/21/2018 6/20/2053 Lagoa 3 100% PB São José do Sabugi 34.7 17.2 6/26/2018 6/25/2053 Lagoa 4 100% PB São José do Sabugi e Santa Luzia 20.8 10.2 6/26/2018 6/25/2053 Canoas 2 100% PB São José do Sabugi e Santa Luzia 34.7 16.3 6/26/2018 6/25/2053 Canoas 3 93% PB São José do Sabugi e Santa Luzia 34.7 16.8 2/5/2019 2/4/2054 Canoas 4 100% PB São José do Sabugi 34.7 16.5 6/26/2018 6/25/2053 Ventos De Arapuá 1 100% PB Areia de Baraúnas 24.3 11.6 2/5/2019 2/4/2054 Ventos De Arapuá 2 100% PB Areia de Baraúnas, São Mamede e Santa Luzia 34.7 17.2 2/5/2019 2/4/2054 Ventos De Arapuá 3 100% PB Areia de Baraúnas e São Mamede 13.9 5.8 2/5/2019 2/4/2054 Oitis Complex 97.3% PI/BA Dom Inocêncio e Casa Nova 566.5 274.1 Between 11/29/2019 and 12/24/2019 Between 11/28/2054 and 12/23/2054 Oitis 1 100% PI Dom Inocêncio 49.5 26.1 11/29/2019 11/28/2054 Oitis 2 97.2% PI/BA Dom Inocêncio 27.5 14.3 12/24/2019 12/23/2054 Oitis 3 94.3% PI/BA Dom Inocêncio 49.5 24.4 12/24/2019 12/23/2054 Oitis 4 93.3% PI/BA Dom Inocêncio 49.5 24.0 12/24/2019 12/23/2054 Oitis 5 94.3% PI/BA Dom Inocêncio 49.5 23.8 12/24/2019 12/23/2054 Oitis 6 94.8% PI/BA Dom Inocêncio 49.5 24.3 12/24/2019 12/23/2054 Oitis 7 94.3% PI/BA Dom Inocêncio 49.5 25.6 12/24/2019 12/23/2054 Oitis 8 100% PI Dom Inocêncio 49.5 25.5 11/29/2019 11/28/2054 Oitis 21 100% PI/BA Casa Nova 44.0 20.8 12/24/2019 12/23/2054 Oitis 22 100% PI/BA Casa Nova 49.5 22.2 12/24/2019 12/23/2054 Oitis 9 100% PI/BA Dom Inocêncio 49.5 21.9 12/24/2019 12/23/2054 Oitis 10 100% PI/BA Dom Inocêncio 49.5 21.2 12/24/2019 12/23/2054 Assured Energy (MW) Concession Date End of ConcessionInstalled Capacity (MW)Wind in Operation Neoenergia Share State Location
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 14 Wind energy generation totaled 1,467 GWh in the 3Q26 (-15% vs. 3Q25) and 3,344 GWh in 9M26 (-17% vs. 9M25), impacted by lower availability of wind. Meanwhile, solar energy generation reached 57 GWh in the 3Q26 (+14% vs. 3Q25) and 161 GWh in 9M26 (-1% vs. 9M25). The impact of curtailment (wind and solar) amounted to 10% of generated energy in the 3Q26 and 8% in 9M26. 1.2.1.2. Hydroelectric Plants At the end of the 3Q26 Neoenergia’s portfolio comprised 3 hydroelectric plants. Note: On April 2, 2026, the closing of the sale transaction for the Dardanelos Hydroelectric Power Plant took place, resulting in a reduction of the stake to an indirect 25% interest, classified as a financial asset. Consequently, the plant's results and respective operational data are excluded from this report as of April 2026. Hydropower generation totaled 264 GWh in the 3Q26 (-13% vs. 3Q25) and 3,764 GWh in 9M26 (-25% vs. 9M25), impacted by the sale of the Baixo Iguaçu HPP in June 2025 and the Dardanelos HPP in April 2026. 1.2.2. Thermal Plant In December 2021, Termopernambuco won the Capacity Reserve Auction with a 15-year contract starting on July 1, 2026. In September 2024, ANEEL approved moving the start date of the contract up to October 1, 2024, maintaining all previous conditions and adding 21 months to the initial term. There was no dispatch in the 3Q26, and in 9M26—with a 1% dispatch rate —the plant generated 14 GWh (compared to 15 GWh in 9M25) under the capacity reserve contract. LUZIA 2 100% PB Santa Luzia 74.7 17.3 5/29/2020 5/29/2055 LUZIA 3 100% PB Santa Luzia 74.7 17.3 5/29/2020 5/29/2055 Concession Date End of ConcessionSolar in Operation Neoenergia Share State Location Installed Capacity (MW) Assured Energy (MW) Date of Concession Authorization UHE Itapebi 100% BA Rio Jequitinhonha 462.0 202.1 5/28/1999 5/15/2039 UHE Corumbá III 76% GO Rio Corumbá 96.5 47 11/7/2001 4/22/2040 Belo Monte 10% PA Rio Xingu 11,233.1 4571 8/26/2010 7/10/2046 End of ConcessionHydro Plants in Operation Neoenergia Share State Location Installed Capacity (MW) Assured Energy (MW) Authorization Expiration UTE Termopernambuco 100% PE Suape - Ipojuca 550 504.1 12/18/2000 12/18/2030 Thermal Power Plant in Operation Neoenergia Share State Location Installed Capacity (MW) Assured Energy (MW) Date of Concession
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 15 2. ECONOMIC-FINANCIAL PERFORMANCE 2.1. Consolidated Neoenergia ended the 3Q26 with a Gross Margin (excluding VNR) of R$ 4,518 million, up by 6% vs. the 3Q25. This result was driven by the positive effects of volume and an expanded customer base across the distribution companies; the positive Parcel B variations from tariff adjustments at Neoenergia Elektro (Aug/25: +1.3%; Aug/26: +2.36%) and Neoenergia Brasília (Oct/25: +8.3%); and the entry into operation of new transmission assets. These effects were partially offset by lower wind g eneration and reduced hydropower margins —stemming from the deconsolidation of Dardanelos (since Apr/26) —as well as the negative Parcel B variations from the Apr/26 tariff adjustments: Neoenergia Coelba ( - 2.01%), Neoenergia Cosern (-2.08%), and Neoenergia Pernambuco (-2.17%). In 9M26, the Gross Margin (excluding VNR) totaled R$ 13,146 million, up by 5% vs. 9M25, driven by positive effects from an expanded customer base and volume; positive Parcel B variations from the distributors' 2025 tariff processes and Neoenergia Elektro’s Aug/26 tariff adjustment; and the entry into operation of new transmission assets. These effects were partially offset by lower wind generation and reduced hydropower margins —resulting from the deconsolidation of Baixo Iguaçu (since Jul/25) and Dardanelos (since Apr/26) —as well as the negative Parcel B variations from the Apr/26 tariff adjustments. Gross margin reached R$ 4,525 million in the 3Q26 (-1% vs. 3Q25) and R$ 14,168 million in 9M26 (+2% vs. 9M25), due to the aforementioned effects as well as a lower VNR resulting from the renewal of the distribution companies' concessions (Neoenergia Pernambuco in Sep/25; Neoenergia Coelba, Elektro, and Cosern in May/26). Operating expenses totaled R$ 1,151 million in the 3Q26 (+6% vs. 3Q25) and R$ 3,405 million in 9M26 (+5% vs. 9M25), in line with inflation, confirming cost discipline that allows for the absorption of pressures from the larger customer base. The provision for doubtful accounts (PECLD) amounted to R$ 143 million in the 3Q26 (+22% vs. 3Q25) and R$ 449 million in 9M26 (+8% vs. 9M25). Under the Equity Income/Corporate Transactions item, +R$ 345 million was recorded in the 3Q26, notably comprising a +R$ 292 million adjustment to fair value related to the corporate transaction involving the transmission companies and GIC, +R$ 83 million from the equity income of transmission assets in partnership with GIC, and -R$ 29 million from the Belo Monte power plant. In 9M26, +R$ 913 million was recorded, consisting of +R$ 324 million from a change in the mix R$ % R$ % Net Operating Revenue¹ 12,022 12,972 (950) (7%) 36,392 36,591 (199) (1%) Costs with Energy² (7,504) (8,692) 1,188 (14%) (23,246) (24,060) 814 (3%) Gross Margin w/out Concession Financial Assets 4,518 4,280 238 6% 13,146 12,531 615 5% Concession Financial Assets (VNR) 7 276 (269) (97%) 1,022 1,382 (360) (26%) GROSS MARGIN 4,525 4,556 (31) (1%) 14,168 13,913 255 2% Operating Expenses (1,151) (1,082) (69) 6% (3,405) (3,244) (161) 5% Provisions for Delinquency (PECLD) (143) (117) (26) 22% (449) (415) (34) 8% (+) Equity Income / Corporate Operations 345 31 314 1013% 913 62 851 1373% EBITDA 3,576 3,388 188 6% 11,227 10,316 911 9% Depreciation (770) (729) (41) 6% (2,250) (2,213) (37) 2% Financial Income (Loss) (1,413) (1,512) 99 (7%) (4,870) (4,448) (422) 9% IR/CS (206) (217) 11 (5%) (720) (79) (641) 811% Minority shareholdings (10) (6) (4) 67% (26) (20) (6) 30% NET INCOME 1,177 924 253 27% 3,361 3,556 (195) (5%) CONSOLIDATED STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26 Variation 9M25
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 16 of assets involving the remeasurement of the previously held interest in the Corumbá business, +R$ 292 million from the adjustment to fair value concerning the corporate transaction involving the transmission companies and GIC, +R$ 23 2 million related to the sale of Dardanelos, +R$ 143 million from the equity income of transmission assets in partnership with GIC, and -R$ 76 million from the result of the Belo Monte power plant. It is worth noting that gains of R$ 31 million in the 3Q25 and R$ 62 million in 9M25 were recorded, driven primarily by the equity income of transmission assets (R$ 36 million in the 3Q25 and R$ 104 million in 9M25) and the adjustment to fair value of the Itabapoana lot (+R$ 7 million in the 3Q25 and -R$ 58 million in 9M25). EBITDA amounted to R$ 3,576 million in the 3Q26 (+6% vs. 3Q25) and R$ 11,227 million in 9M26 (+9% vs. 9M25). Cash EBITDA (excluding VNR, IFRS, and Corporate Operations) was R$ 3,150 million in the 3Q26 (+12% vs. the 3Q25) and R$ 8,902 million in 9M26 (+9% vs. 9M25). The financial result was -R$ 1,413 million in the 3Q26 (vs. -R$ 1,512 million in the 3Q25), driven by higher income from financial investments resulting from an increase in the average volume invested; and -R$ 4,870 million in 9M26 (vs. -R$ 4,448 million in 9M25), driven by an increase in the average debt balance due to funds raised for di stribution Capex. The Income Tax/Social Contribution (IR/CS) line item for the quarter was -R$ 206 million (vs. -R$ 217 million in the 3Q25), and the year-to-date figure was -R$ 720 million (vs. -R$ 79 million in 9M25). It is worth noting that the 2Q25 saw a positive impact from the recovery of unduly paid taxes , generating a credit of R$ 770 million; this resulted from the exclusion of the adjustments to the Selic rate on unduly paid taxes amounts following the removal of ICMS from the PIS/COFINS calculation base. As a result of the effects shown, net income amounted to R$1,177 million in the 3Q26 (+27% vs. 3Q25) and R$3,361 million in 9M26 (-5% vs. 9M25). 2.2. Networks The results of the networks business contemplate the performance of both distributors and transmission lines. The Networks business ended the 3Q26 with a Gross Margin without VNR of R$ 4,050 million, +8% vs. the 3Q25, impacted by the positive effects of volume and increase in the distributors' customer base, positive variations in Parcel B in the tariff adjustments of Neoenergia Elektro in Aug/25 (+1.3%) and Aug/26 (+2.36%), and of Neoenergia Brasília in Oct/25 (+8.3%), in addition to the new transmission assets that came into operation. These effects were partially offset by the negative R$ % R$ % Net Revenue 11,420 12,270 (850) (7%) 34,647 34,706 (59) (0%) Costs with energy (7,370) (8,514) 1,144 (13%) (22,647) (23,513) 866 (4%) Gross Margin w/out Concession Financial Assets 4,050 3,756 294 8% 12,000 11,193 807 7% Concession Financial Assets (VNR) 7 276 (269) (97%) 1,022 1,382 (360) (26%) Gross Margin 4,057 4,032 25 1% 13,022 12,575 447 4% Operating Expenses (942) (899) (43) 5% (2,806) (2,657) (149) 6% Provisions for Delinquency (PECLD) (142) (116) (26) 22% (447) (414) (33) 8% (+) Equity Income / Corporate Operations 374 43 331 770% 434 46 388 843% EBITDA 3,347 3,060 287 9% 10,203 9,550 653 7% Depreciation (646) (583) (63) 11% (1,876) (1,716) (160) 9% Financial Income (Loss) (1,438) (1,484) 46 (3%) (4,775) (4,288) (487) 11% IR CS (164) (174) 10 (6%) (611) 22 (633) N/A NET INCOME 1,099 819 280 34% 2,941 3,568 (627) (18%) NETWORKS STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26 Variation 9M25
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 17 variations in Parcel B of the Apr/26 adjustments: Neoenergia Coelba ( -2.01%), Neoenergia Cosern ( -2.08%) and Neoenergia Pernambuco (-2.17%). In the year-to-date, the Gross Margin without VNR amounted to R$ 12,000 million, +7% vs. 9M25, due to the positive effects of the increase in the customer base, volume, positive variations in Parcel B in the distributors' 2025 tariff processes and in the Neoenergia Elektro tariff adjustment of Aug/26, in addition to the new transmission assets that came into operation. These effects were partially offset by the negative variations in Parcel B of the Apr/26 adjustments. Gross margin amounted to R$ 4,057 million in the 3Q26 (+1% vs. 3Q25) and R$ 13,022 million in 9M26 (+4% vs. 9M25), due to the aforementioned effects, in addition to the lower VNR due to the renewal of distributors' concessions (Neoenergia Pernambuco in Sep/25, Neoenergia Coelba, Elektro and Cosern in May /26). Operating expenses totaled R$ 942 million in the 3Q26 (+5% vs. 3Q25) and R$ 2,806 million in 9M26 (+6% vs. 9M25). The provision for doubtful accounts (PECLD) was R$ 142 million in the 3Q26 (+22% vs. 3Q25) and R$ 447 million in 9M26 (+8% vs. 9M25). Under the Equity Income/Corporate Transactions line item, +R$ 374 million was recorded in the 3Q26 and +R$ 434 million in 9M26; this comprised +R$ 292 million in adjustments to fair value related to the corporate transaction involving the transmission companies and GIC, as well as the equity income of transmission assets held in partnership with GIC (+R$ 83 million in the 3Q26 and +R$ 143 million in 9M26). It is worth noting that +R$ 43 million was recorded in the 3Q25 and +R$ 46 million in 9M25, reflecting the equity income of transmission assets (R$ 36 million in the 3Q25 and R$ 104 million in 9M25) and the adjustment to fair value of the Itabapoana lot (+R$ 7 million in the 3Q25 and -R$ 58 million in 9M25). Networks EBITDA amounted to R$ 3,347 million in the 3Q26 (+9% vs. 3Q25) and R$ 10,203 million in 9M26 (+7% vs. 9M25). Cash EBITDA (excluding VNR, IFRS, and Corporate Operations) stood at R$ 2,921 million in the 3Q26 (+19% vs. 3Q25) and R$ 8,435 million in 9M26 (+14% vs. 9M25). The financial result totaled -R$ 1,438 million in the 3Q26 (vs. -R$ 1,484 million in 3Q25) —driven by higher income from financial investments resulting from an increase in the average volume invested —and -R$ 4,775 million in 9M26 (vs. -R$ 4,288 million in 9M25), due to a higher average debt balance resulting from funds raised for distribution Capex. The income tax/social contribution (IR/CS) line item for the quarter recorded -R$ 164 million ( -6% vs. 3Q25), while the year-to-date figure was -R$ 611 million (vs. +R$ 22 million in 9M25). It is worth noting that the 2Q25 included a positive impact from the recovery of unduly paid taxes, generating a credit of R$ 770 million; this stemmed from the exclusion of Selic rate adjustments on amounts unduly paid following the removal of ICMS from the PIS/COFINS calculation base. As a result of the aforementioned factors, net income of the Networks segment amounted to R$ 1,099 million in the 3Q26 (+34% vs. 3Q25) and R$ 2,941 million in the year-to-date (-18% vs. 9M25).
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 18 The transmission companies reported a Gross Margin of R$ 431 million in the 3Q26 (-14% vs. the 3Q25) and R$ 1,338 million in 9M26 (+5% vs. 9M25), driven by new assets that started operation. Operating expenses totaled R$ 50 million in the 3Q26 ( -6% vs. 3Q25) —primarily due to the non -consolidation of Itabapoana in the 3Q26—and R$ 112 million in 9M26 (-22% vs. 9M25), the latter explained by a one-off effect of a favorable court ruling against a supplier regarding damaged equipment. Under the line item for Equity Income/Corporate Transactions, +R$ 374 million was recorded in the 3Q26 and +R$ 434 million in 9M26. This includes a +R$ 292 million adjustment to fair value related to the corporate transaction between the transmission companies and GIC, as well as the equity income of transmission assets held in partnership with GIC (+R$ 83 million in the 3Q26 and +R$ 143 million in 9M26). It is worthy of mention that +R$ 43 million was recorded in the 3Q25 and +R$ 46 million in 9M25, comprising equity income of transmission assets (R$ 36 million in the 3Q25 and R$ 104 million in 9M25) and an adjustment to fair value of the Itabapoana project (+R$ 7 million in the 3Q25 and -R$ 58 million in 9M25). As a result of the abovementioned variations, transmission EBITDA closed the quarter at R$ 754 million (+54% vs. the 3Q25), with a year -to-date total of R$ 1,658 million (+41% vs. 9M25). Cash EBITDA (excluding IFRS adjustments and corporate operations) reached R$ 335 million in the 3Q26 (+110% vs. 3Q25) and R$ 912 million in 9M26 (+114% vs. 9M25). The financial result was -R$ 143 million in the 3Q26 (compared to -R$ 189 million in the 3Q25) and -R$ 664 million in 9M26 (compared to -R$ 665 million in 9M25). The transmission business recorded a profit of R$ 541 million in the 3Q26 (+147% vs. 3Q25) and R$ 834 million in 9M26 (+118% vs. 9M25). R$ % R$ % Net Revenue 551 1,226 (675) (55%) 1,670 3,922 (2,252) (57%) Construction Costs (120) (726) 606 (83%) (332) (2,643) 2,311 (87%) Gross Margin 431 500 (69) (14%) 1,338 1,279 59 5% Operating Expenses (50) (53) 3 (6%) (112) (144) 32 (22%) Provisions for Delinquency (PECLD) (1) (1) - - (2) (2) - - (+) Equity Income / Corporate Operations 374 43 331 770% 434 46 388 843% EBITDA 754 489 265 54% 1,658 1,179 479 41% Depreciation (2) (2) - - (6) (7) 1 (14%) Financial Income (Loss) (143) (189) 46 (24%) (664) (665) 1 (0%) IR CS (68) (79) 11 (14%) (154) (126) (28) 22% NET INCOME 541 219 322 147% 834 382 452 118% IFRS15 128 322 (194) (60%) 455 810 (355) (44%) S/I TRANSMISSION (R$ MN) 3Q26 3Q25 Variation 9M26 Variation 9M25
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 19 2.2.1. NEOENERGIA COELBA Neoenergia Coelba reported a gross margin , excluding VNR, of R$ 1,593 million in the 3Q26 (+10% vs. 3Q25), driven by higher volumes, which were partially offset by the negative impact of a -2.01% adjustment to Parcel B implemented in April 2026. For the first nine months of 2026 (9M26), the gross margin (excluding VNR) reached R$ 4,735 mil lion (+6% vs. 9M25), also due to higher volumes in addition to the positive impact of a +8.1% adjustment to Parcel B in the April 2025. The gross margin stood at R$ 1,596 million in the 3Q26 (in line with the 3Q25) and R$ 5,371 million in 9M26 (+4% vs. 9M25), reflecting the aforementioned factors, in addition to a lower VNR following the concession renewal of May 2026. Operating expenses totaled R$ 413 million in the 3Q26, consistent with the 3Q25, and R$ 1,248 million in 9M26 (+5% vs. 9M25), primarily due to increased spending on collection efforts and service disconnection initiatives. For the quarter, the provision for doubtful accounts (PECLD) totaled R$ 37 million ( -8% vs. 3Q25), reaching R$ 141 million for the year -to-date (+4% vs. 9M25). The delinquency indicator (PECLD/ ROB) for the 3Q26 closed at 0.95%, remaining below the regulatory limit of 1.31%. As a result of the abovementioned variations, EBITDA reached R$ 1,146 million for the quarter (in line with the 3Q25) and R$ 3,982 million for the year -to-date (+3% vs. 9M25). Cash EBITDA (excluding VNR) amounted to R$ 1,143 million in the 3Q26 (+15% vs. 3Q25) and R$ 3,346 million in 9M26 (+7% vs. 9M25). The financial result was -R$ 658 million in the 3Q26 (vs. -R$ 599 million in 3Q25) and -R$ 2,018 million in 9M26 (vs. -R$ 1,627 million in 9M25), driven by an increase in debt-related charges resulting from a higher average debt balance. The income tax and social contribution (IR/CS) item for the quarter totaled +R$ 6 million (vs. -R$ 41 million in the 3Q25), while the year-to-date figure was -R$ 174 million (vs. -R$ 16 million in 9M25). It is worth noting that the 9M25 figure included a positive impact from unduly paid taxes, generating a credit of R$ 274 million—stemming from the exclusion of the Selic adjustment on these payments, following the removal of the ICMS from the PIS/COFINS calculation base. Net income amounted to R$ 201 million in the 3Q26 (-19% vs. 3Q25) and R$ 948 million in 9M26 (-35% vs. 9M25). R$ % R$ % Net Revenue 4,416 4,494 (78) (2%) 13,443 12,606 837 7% Costs with energy (2,823) (3,046) 223 (7%) (8,708) (8,159) (549) 7% Gross Margin w/out Concession Financial Assets 1,593 1,448 145 10% 4,735 4,447 288 6% Concession Financial Assets (VNR) 3 148 (145) (98%) 636 732 (96) (13%) Gross Margin 1,596 1,596 - - 5,371 5,179 192 4% Operating Expenses (413) (414) 1 (0%) (1,248) (1,187) (61) 5% Provisions for Delinquency (PECLD) (37) (40) 3 (8%) (141) (136) (5) 4% EBITDA 1,146 1,142 4 0% 3,982 3,856 126 3% Depreciation (293) (255) (38) 15% (842) (757) (85) 11% Financial Income (Loss) (658) (599) (59) 10% (2,018) (1,627) (391) 24% IR CS 6 (41) 47 N/A (174) (16) (158) 988% NET INCOME 201 247 (46) (19%) 948 1,456 (508) (35%) Variation STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26 9M25
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 20 2.2.2. NEOENERGIA PERNAMBUCO Neoenergia Pernambuco reported a gross margin (excluding VNR) of R$ 677 million in the 3Q26 (+16% vs. the 3Q25), driven by higher volume and a larger customer base, partially offset by the negative impact of a -2.17% adjustment to Parcel B during the April 2026 tariff review. For the first nine months of 2026 (9M26), the gross margin (excluding VNR) reached R$ 2,115 million (+22% vs. 9M25), also due to higher volumes, as well as the positive impact of a +16.2% adjustment to Parcel B during the April 2025 tariff adjustment. Gross margin totaled R$ 678 million in the 3Q26 (+8% vs. 3Q25) and R$ 2,122 million in 9M26 (+7% vs. 9M25), reflecting the aforementioned factors, in addition to a lower VNR following the concession renewal in September 2025. Operating expenses amounted to R$ 209 million in the 3Q26 (+9% vs. 3Q25) and R$ 622 million in 9M26 (+9% vs. 9M25), mainly due to higher fleet expenses, driven by higher fuel prices . For the quarter, the provision for doubtful accounts (PECLD) totaled R$ 54 million (+29% vs. 3Q25), and for the year -to- date, it reached R$ 176 million (+11% vs. 9M25). As a result of the aforementioned variations, EBITDA reached R$ 415 million for the quarter (+6% vs. 3Q25) and R$ 1,324 million for the year -to-date (+6% vs. 9M25). Cash EBITDA ( excluding VNR) in the 3Q26 totaled R$ 414 million (+18% vs. 3Q25), and for the first nine months of 2026 (9M26), it reached R$ 1,317 million (+31% vs. 9M25). The financial result was -R$ 211 million in the 3Q26 (compared to -R$ 289 million in the 3Q25) and -R$ 761 million in 9M26 (compared to -R$ 820 million in 9M25), driven by a reduction in debt-related charges resulting from a lower IPCA. Income tax and social contribution (IR/CS) for the quarter amounted to -R$ 16 million (compared to +R$ 15 million in the 3Q25), while the year-to-date figure was -R$ 14 million (compared to +R$ 401 million in 9M25). It is worth noting that the 2Q25 included a positive impact from the recovery of unduly paid taxes, generating a credit of R$ 394 million; this stemmed from the exclusion of Selic-based interest adjustments on unduly paid taxes, following the removal of the ICMS from the PIS/COFINS tax base. Net income was R$ 65 million in the 3Q26 (+1,200% vs. 3Q25) and R$ 188 million in 9M26 (-61% vs. 9M25). R$ % R$ % Net Revenue 2,231 2,080 151 7% 6,817 5,870 947 16% Costs with energy (1,554) (1,497) (57) 4% (4,702) (4,136) (566) 14% Gross Margin w/out Concession Financial Assets 677 583 94 16% 2,115 1,734 381 22% Concession Financial Assets (VNR) 1 43 (42) (98%) 7 240 (233) (97%) Gross Margin 678 626 52 8% 2,122 1,974 148 7% Operating Expenses (209) (191) (18) 9% (622) (572) (50) 9% Provisions for Delinquency (PECLD) (54) (42) (12) 29% (176) (158) (18) 11% EBITDA 415 393 22 6% 1,324 1,244 80 6% Depreciation (123) (114) (9) 8% (361) (337) (24) 7% Financial Income (Loss) (211) (289) 78 (27%) (761) (820) 59 (7%) IR CS (16) 15 (31) N/A (14) 401 (415) N/A NET INCOME 65 5 60 1200% 188 488 (300) (61%) Variation STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26 9M25
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 21 2.2.3. NEOENERGIA COSERN Neoenergia Cosern reported a gross margin (excluding VNR) of R$ 356 million in the 3Q26 (+6% vs. 3Q25), driven by higher volumes and an expanded customer base, which offset the tariff adjustment of April 2026—an adjustment that resulted in a negative variation of Parcel B (-2.08%). For the first nine months of 2026 (9M26), the gross margin, excluding VNR, reached R$ 1,059 million (+7% vs. 9M25), also reflecting the aforementioned factors , as well as the positive impact of a +6.6% adjustment to Parcel B in the April 2025 tariff adjustment. Total gross margin stood at R$ 356 million in the 3Q26 (-3% vs. the 3Q25) and R$ 1,195 million in 9M26 (+4% vs. 9M25), due to the aforementioned effects combined with a lower VNR following the concession renewal of May 2026. Operating expenses totaled R$ 69 million in the 3Q26 (+11% vs. 3Q25) and R$ 212 million in 9M26 (+8% vs. 9M25), mainly impacted by higher personnel expenses due to increased profit -sharing provisions. Provisions for doubtful accounts (PECLD) totaled R$ 9 million in the 3Q26 (+125% vs. 3Q25) and R$ 25 million in 9M26 (+67% vs. 9M25). As a result of these variations, EBITDA reached R$ 278 million in the 3Q26 (-7% vs. 3Q25) and R$ 958 million in 9M26 (+2% vs. 9M25). Cash EBITDA, excluding VNR, reached R$ 278 million in the 3Q26 (+3% vs. 3Q25) and R$ 822 million in 9M26 (+5% vs. 9M25). The financial result was -R$ 76 million in the 3Q26 (vs. -R$ 77 million in the 3Q25) and -R$ 284 million in 9M26 (vs. -R$ 242 million in 9M25), driven by an increase in debt-related charges due to a higher average debt balance, as well as a one-off positive impact of R$ 18 million in the 2Q25 related to the monetary adjustment to unduly paid taxes. The income tax and social contribution (IR/CS) item for the quarter amounted to -R$ 16 million (-30% vs. the 3Q25), and -R$ 49 million for the year-to-date (+58% vs. 9M25). It is worth noting that the 9M25 figure included a positive impact from unduly paid taxes, resulting in a credit of R$ 60 million —stemming from the exclusion of the Selic adjustment on these payments, following the removal of the ICMS from the PIS/COFINS calculation base. Net income totaled R$ 132 million in the 3Q26 (-13% vs. 3Q25) and R$ 468 million in 9M26 (-10% vs. 9M25). R$ % R$ % Net Revenue 965 1,028 (63) (6%) 2,943 2,845 98 3% Costs with energy (609) (692) 83 (12%) (1,884) (1,852) (32) 2% Gross Margin w/out Concession Financial Assets 356 336 20 6% 1,059 993 66 7% Concession Financial Assets (VNR) - 30 (30) (100%) 136 154 (18) (12%) Gross Margin 356 366 (10) (3%) 1,195 1,147 48 4% Operating Expenses (69) (62) (7) 11% (212) (197) (15) 8% Provisions for Delinquency (PECLD) (9) (4) (5) 125% (25) (15) (10) 67% EBITDA 278 300 (22) (7%) 958 935 23 2% Depreciation (54) (49) (5) 10% (157) (144) (13) 9% Financial Income (Loss) (76) (77) 1 (1%) (284) (242) (42) 17% IR CS (16) (23) 7 (30%) (49) (31) (18) 58% NET INCOME 132 151 (19) (13%) 468 518 (50) (10%) Variation STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26 9M25
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 22 2.2.4. NEOENERGIA ELEKTRO Neoenergia Elektro reported a gross margin, excluding VNR, of R$ 813 million in the 3Q26 (+9% vs. 3Q25), driven by higher volumes, an expanded customer base, and the tariff adjustment of August 2026, which resulted in a positive variation of Parcel B (+2.36%). For the first nine months of 2026 (9M26), the gross margin excluding VNR amounted to R$ 2,298 million (-2% vs. 9M25); this was impacted by an unfavorable mix, which was partially offset by the positive variation of 1.30% in Parcel B from the August 2025 tariff adjustment, along with the aforementioned factors. Gross margin reached R$ 814 million in the 3Q26 (+2% vs. 3Q25) and R$ 2,515 million in 9M26 ( -3% vs. 9M25), reflecting the aforementioned effects, which were partially offset by a lower VNR during the period , a result of the concession renewal that took place in May 2026. Operating expenses totaled R$ 171 million in the 3Q26 (+1% vs. 3Q25), absorbing the impact of inflation. For 9M26, these expenses amounted to R$ 526 million (+5% vs. 9M25). For the quarter, the provision for doubtful accounts (PECLD) totaled R$ 22 million (+38% vs. the 3Q25), while the year - to-date figure reached R$ 61 million (-12% vs. 9M25). As a result of the aforementioned variations, EBITDA reached R$ 621 million for the quarter (+2% vs. 3Q25) and R$ 1,928 million for the year-to-date period (-4% vs. 9M25). Cash EBITDA (excluding VNR) in the 3Q26 was R$ 620 million (+11% vs. 3Q25), and for the first nine months of 2026 (9M26) it totaled R$ 1,711 million ( -3% vs. 9M25). The financial result was -R$ 275 million in the 3Q26 (vs. -R$ 256 million in the 3Q25) and -R$ 851 million in 9M26 (vs. -R$ 724 million in 9M25), driven by an increase in debt-related charges resulting from a higher average debt balance. Income tax and social contribution (IR/CS) for the quarter amounted to -R$ 69 million (vs. -R$ 47 million in the 3Q25), while the year -to-date figure was -R$ 219 million (vs. -R$ 228 million in 9M25). It is worth noting that the 9M25 figure included a positive impact from unduly paid taxes, generating a credit of R$ 39 million given the exclusion of Selic-based interest adjustments on unduly paid taxes, following the removal of the ICMS from the PIS/COFINS calculation base. Net income was R$ 160 million in the 3Q26 (-18% vs. 3Q25) and R$ 507 million in 9M26 (-31% vs. 9M25). R$ % R$ % Net Revenue 2,449 2,507 (58) (2%) 7,203 6,925 278 4% Costs with energy (1,636) (1,763) 127 (7%) (4,905) (4,588) (317) 7% Gross Margin w/out Concession Financial Assets 813 744 69 9% 2,298 2,337 (39) (2%) Concession Financial Assets (VNR) 1 51 (50) (98%) 217 244 (27) (11%) Gross Margin 814 795 19 2% 2,515 2,581 (66) (3%) Operating Expenses (171) (169) (2) 1% (526) (502) (24) 5% Provisions for Delinquency (PECLD) (22) (16) (6) 38% (61) (69) 8 (12%) EBITDA 621 610 11 2% 1,928 2,010 (82) (4%) Depreciation (117) (111) (6) 5% (351) (322) (29) 9% Financial Income (Loss) (275) (256) (19) 7% (851) (724) (127) 18% IR CS (69) (47) (22) 47% (219) (228) 9 (4%) NET INCOME 160 196 (36) (18%) 507 736 (229) (31%) Variation STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26 9M25
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 23 2.2.5. NEOENERGIA BRASÍLIA Neoenergia Brasília reported a gross margin , excluding VNR, of R$ 203 million in the 3Q26 (+23% vs. 3Q25) and R$ 534 million in 9M26 (+16% vs. 9M25). This performance was driven by the tariff adjustment of October 2025, which resulted in a positive variation in Parcel B (+8.3%), as well as an expansion of the customer base during the period. Gross margin reached R$ 204 million in the 3Q26 (+21% vs. 3Q25) and R$ 560 million in 9M26 (+19% vs. 9M25), reflecting the aforementioned factors, in addition to a higher VNR for the year. Operating expenses totaled R$ 53 million in the 3Q26 (+66% vs. 3Q25) and R$ 166 million in 9M26 (+38% vs. 9M25), due to positive non-recurring effects recorded in 9M25. For the quarter, the provision for doubtful accounts (PECLD) totaled R$ 18 million (+29% vs. 3Q25), and for the year -to- date, it reached R$ 41 million (+17% vs. 9M25). As a result of the aforementioned variations, EBITDA stood at R$ 133 million for the quarter (+9% vs. 3Q25) and R$ 353 million for the year-to-date (+12% vs. 9M25). The financial result was -R$ 73 million in the 3Q26 (vs. -R$ 75 million in the 3Q25) and -R$ 195 million in 9M26 (vs. -R$ 210 million in 9M25), reflecting lower debt charges due to a reduction in the CDI rate during the period. The income tax and social contribution (IR/CS) item for the quarter was -R$ 4 million (vs. -R$ 1 million in the 3Q25), and the year-to-date figure was -R$ 5 million (vs. -R$ 18 million in 9M25). It is worth noting that in the 2Q25, there was a positive impact from the recovery of unduly paid taxes generating a credit of R$ 3 million; this resulted from the exclusion of the Selic-based adjustment on unduly paid taxes, following the removal of the ICMS from the PIS/COFINS calculation base. The Company recorded a net result of R$ 0 million in the 3Q26 (vs. -R$ 4 million in 3Q25) and -R$ 6 million in 9M26 (vs. -R$ 25 million in 9M25). R$ % R$ % Net Revenue 831 956 (125) (13%) 2,649 2,596 53 2% Costs with energy (628) (791) 163 (21%) (2,115) (2,137) 22 (1%) Gross Margin w/out Concession Financial Assets 203 165 38 23% 534 459 75 16% Concession Financial Assets (VNR) 1 3 (2) (67%) 26 12 14 117% Gross Margin 204 168 36 21% 560 471 89 19% Operating Expenses (53) (32) (21) 66% (166) (120) (46) 38% Provisions for Delinquency (PECLD) (18) (14) (4) 29% (41) (35) (6) 17% EBITDA 133 122 11 9% 353 316 37 12% Depreciation (56) (50) (6) 12% (159) (149) (10) 7% Financial Income (Loss) (73) (75) 2 (3%) (195) (210) 15 (7%) IR CS (4) (1) (3) 300% (5) 18 (23) (128%) NET INCOME - (4) 4 (100%) (6) (25) 19 (76%) 9M25 Variation STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 24 2.3. Generation and Customers The result of the Generation and Customers business includes the performance of wind farms, solar parks, hydroelectric plants, thermal power plant, and the Neoenergia Group's trading company. R$ % R$ % Net Revenue 931 1,132 (201) (18%) 2,814 3,220 (406) (13%) Costs with energy (453) (594) 141 (24%) (1,641) (1,843) 202 (11%) Gross Margin 478 538 (60) (11%) 1,173 1,377 (204) (15%) Operating Expenses (120) (125) 5 (4%) (356) (395) 39 (10%) Provisions for Delinquency (PECLD) (1) (1) - - (2) (1) (1) 100% (+) Equity Income / Corporate Operations (29) (18) (11) 61% 479 10 469 4690% EBITDA 328 394 (66) (17%) 1,294 991 303 31% Depreciation (88) (88) - - (260) (322) 62 (19%) Financial Income (Loss) 4 (7) 11 N/A (45) (93) 48 (52%) IR CS (42) (50) 8 (16%) (111) (123) 12 (10%) NET INCOME 202 249 (47) (19%) 878 453 425 94% 9M26GENERATION AND CUSTOMERS STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M25 Variation R$ % R$ % Net Revenue 91 166 (75) (45%) 392 611 (219) (36%) Costs with energy (15) (40) 25 (63%) (71) (136) 65 (48%) Gross Margin 76 126 (50) (40%) 320 475 (155) (33%) Operating Expenses (22) (13) (9) 69% (53) (63) 10 (16%) (+) Equity Income / Corporate Operations (29) (18) (11) 61% 481 11 470 4273% EBITDA 25 95 (70) (74%) 748 423 325 77% Depreciation (31) 3 (34) N/A (75) (52) (23) 44% Financial Income (Loss) (6) (3) (3) 100% 10 (15) 25 N/A IR CS 19 (15) 34 N/A (9) (40) 31 (78%) NET INCOME 6 80 (74) (93%) 674 317 357 113% 9M25HYDRO PLANTS STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26 Variation R$ % R$ % Net Revenue 343 432 (89) (21%) 908 1,059 (151) (14%) Costs with energy (50) (90) 40 (44%) (317) (355) 38 (11%) Gross Margin 293 342 (49) (14%) 592 704 (112) (16%) Operating Expenses (60) (73) 13 (18%) (191) (209) 18 (9%) EBITDA 233 269 (36) (13%) 400 496 (96) (19%) Depreciation (44) (77) 33 (43%) (146) (228) 82 (36%) Financial Income (Loss) 3 (12) 15 N/A (75) (98) 23 (23%) IR CS (45) (29) (16) 55% (73) (71) (2) 3% NET INCOME 148 151 (3) (2%) 107 98 9 9% 9M25WIND FARMS STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26 Variation
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 25 The Generation and Customers business reported a gross margin of R$ 478 million in the 3Q26 (-11% vs. 3Q25) and R$ 1,173 million in 9M26 (-15% vs. 9M25). This primarily reflects lower wind generation and a reduced margin from hydroelectric plants due to the deconsolidation of Dardanelos (effective April 2026) —partially offset by the stronger performance of the energy trading unit ( Trading Company ), driven by better settlement margins in the CCEE (Electric Energy Trading Chamber) and the start of operations of industrial green solution projects. It is worth noting that +R$ 30 million was recognized in the 3Q26, and R$ 77 million in 9M26, as compensation for curtailment , in addition to the R$ 9 million previously recognized in 9M25. Operating expenses totaled R$ 120 million in the 3Q26 ( -4% vs. 3Q25) and R$ 356 million in 9M26 ( -10% vs. 9M25), influenced by the deconsolidation of the Baixo Iguaçu and Dardanelos assets. R$ % R$ % Net Revenue 17 22 (5) (23%) 56 63 (7) (11%) Costs with energy (1) (12) 11 (92%) (24) (40) 16 (40%) Gross Margin 16 10 6 60% 32 23 9 39% Operating Expenses (2) (2) - - (6) (5) (1) 20% EBITDA 14 8 6 75% 26 18 8 44% Depreciation (3) (5) 2 (40%) (9) (13) 4 (31%) Financial Income (Loss) 1 1 - - 2 1 1 100% IR CS (1) (1) - - (3) (3) - - NET INCOME 11 3 8 267% 16 3 13 433% 9M26SOLAR FARMS STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M25 Variation R$ % R$ % Net Revenue 62 57 5 9% 188 165 23 14% Costs with energy (34) (36) 2 (6%) (118) (111) (7) 6% Gross Margin 28 21 7 33% 70 54 16 30% Operating Expenses (12) (15) 3 (20%) (43) (49) 6 (12%) EBITDA 15 6 9 150% 27 5 22 440% Depreciation (7) (7) - - (23) (24) 1 (4%) Financial Income (Loss) 3 5 (2) (40%) 8 17 (9) (53%) IR CS (2) - (2) - (1) 4 (5) N/A NET INCOME 9 4 5 125% 12 2 10 500% 9M25 VariationTERMOPERNAMBUCO STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26 R$ % R$ % Net Revenue 439 460 (21) (5%) 1,296 1,325 (29) (2%) Costs with energy (354) (416) 62 (15%) (1,112) (1,201) 89 (7%) Gross Margin 85 44 41 93% 184 124 60 48% Operating Expenses (44) (26) (18) 69% (89) (72) (17) 24% Provisions for Delinquency (PECLD) (1) (1) - - (2) (1) (1) 100% EBITDA 40 17 23 135% 93 51 42 82% Depreciation (3) (2) (1) 50% (7) (5) (2) 40% Financial Income (Loss) 3 1 2 200% 10 2 8 400% IR CS (12) (5) (7) 140% (25) (13) (12) 92% NET INCOME 28 11 17 155% 71 35 36 103% 9M25 Variation COMERC. STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 26 Under the "Equity Income/Corporate Transactions" item, a loss of R$ 29 million was recorded in the 3Q26, stemming from the results of the Belo Monte power plant. For 9M26, a gain of R$ 479 million was recorded, comprising: +R$ 324 million from a change in the mix of assets involving the remeasurement of the previously held stake in the Corumbá business, +R$ 232 million from the sale of Dardanelos, and -R$ 76 million from the results of the Belo Monte power plant. It is worth noting that -R$ 18 million in the 3Q25 and +R$ 10 million in 9M25 were recorded, driven by the adjustment to fair value regarding the sale of the Baixo Iguaçu plant (-R$ 21 million in the 3Q25 and +R$ 2 million in 9M25) and the result from the Corumbá plant (+R$ 3 million in the 3Q25 and +R$ 10 million in 9M25). Taking these effects into account, EBITDA reached R$ 328 million in the 3Q26 (-17% vs. the 3Q25) and R$ 1,294 million in 9M26 (+31% vs. 9M25). Meanwhile, Cash EBITDA , excluding Corporate Operation s, amounted to R$ 328 million in the 3Q26 (-13% vs. 3Q25) and R$ 725 million in 9M26 (-17% vs. 9M25). The financial result was +R$ 4 million in the 3Q26 (vs. -R$ 7 million in 3Q25) and -R$ 45 million in 9M26 (vs. -R$ 93 million in 9M25), impacted by a positive effect of R$ 24 million due to the recognition of the UBP (Use of Public Property) discount on hydroelectric plants in the 2Q26. Net income was R$ 202 million in the 3Q26 (-19% vs. 3Q25) and R$ 878 million in 9M26 (+94% vs. 9M25). 3. EBITDA In compliance with CVM Resolution nº 156/22, we display in the table below the EBITDA reconciliation, and we add that the calculations shown are in line with the criteria provided for in that same resolution: R$ % R$ % Net Income for the Period (A) 1,177 924 253 27% 3,361 3,556 (195) (5%) Profit assigned to minority shareholders (B) (10) (6) (4) 67% (26) (20) (6) 30% Financial Expenses (C) (1,518) (1,552) 34 (2%) (5,258) (4,779) (479) 10% Financial Revenues (D) 385 332 53 16% 1,133 937 196 21% Other net financial income (loss) (E) (280) (292) 12 (4%) (745) (606) (139) 23% Income tax and social contribution (F) (206) (217) 11 (5%) (720) (79) (641) 811% Depreciation and amortization (G) (770) (729) (41) 6% (2,250) (2,213) (37) 2% EBITDA = (A-(B+C+D+E+F+G)) 3,576 3,388 188 6% 11,227 10,316 911 9% Financial Asset (Concession) (H) 7 276 (269) (97%) 1,022 1,382 (360) (26%) IFRS 15 (I) 128 322 (194) (60%) 455 810 (355) (44%) Corporate Operations (J) 291 (14) 305 (2179%) 848 (55) 903 (1642%) Adjusted EBITDA = (EBITDA - (H+I+J)) 3,150 2,804 346 12% 8,902 8,180 722 9% 9M25 Variation EBITDA (R$ MN) 3Q26 3Q25 Variation 9M26
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 27 4. FINANCIAL RESULT The consolidated financial result was -R$ 1,413 million in the 3Q26 (compared to -R$ 1,512 million in the 3Q25), driven by higher income from financial investments resulting from an increase in the average volume of invested funds , in addition to lower financial charges, due to a decrease in the IPCA and the CDI during the period. For the first nine months of 2026 (9M26), the financial result was -R$ 4,870 million (compared to -R$ 4,448 million in 9M25). This is primarily explained by higher debt-related charges, following a 17% increase in the average debt balance compared to 9M25 , a result of capital raised for Capex, which was partially offset by higher income from financial investments. 5. INVESTMENTS Neoenergia’s Capex ended the 9M26 at R$ 6.2 billion, as displayed in the table below: Note: Do not consider financial adjustments and capitalized provisions R$ % R$ % Revenue from financial investments 282 240 42 18% 815 657 158 24% Charges, monetary and exchange variations and debt derivative financial Instruments (1,601) (1,615) 14 (1%) (5,410) (4,812) (598) 12% Other financial income (loss) not related to debt (94) (137) 43 (31%) (275) (293) 18 (6%) Interest, commissions and arrears interest 70 92 (22) (24%) 237 274 (37) (14%) Monetary and exchange variations - other 24 16 8 50% 62 109 (47) (43%) Adjustment to provision for contingencies / judicial deposits (32) (17) (15) 88% (134) (66) (68) 103% Adjustment to sector financial assets / liabilities 24 (67) 91 N/A 40 (188) 228 N/A Post-employment liabilities (25) (24) (1) 4% (74) (76) 2 (3%) Other net financial revenues (expenses) (155) (137) (18) 13% (406) (346) (60) 17% Total (1,413) (1,512) 99 (7%) (4,870) (4,448) (422) 9% 9M25 VariationNET FINANCIAL INCOME (R$ MN) 3Q26 3Q25 Variation 9M26 CAPEX Neoenergia (R$ million) 3Q26 3Q25 ∆ % 9M26 9M25 ∆ % Networks 2,113 2,526 (16%) 6,027 7,458 (19%) Distributors 1,989 1,797 11% 5,684 4,806 18% Transmission Lines 124 730 (83%) 342 2,652 (87%) Generation and Customers 74 71 5% 131 161 (18%) Hydroelectric plants 15 26 (44%) 21 37 (43%) Wind Farms 54 31 73% 85 85 (0%) Termopernambuco 2 3 (30%) 2 22 (89%) Customers 3 10 (72%) 22 17 31% Other 7 0 N/A 15 9 62% TOTAL 2,194 2,597 (16%) 6,172 7,628 (19%)
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 28 5.1. Networks 5.1.1. Distribution In 9M26, the distributors’ Capex amounted to R $ 5.7 billion, of which R$ 3.6 billion were used for the expansion of networks. The table below displays the breakdown of Capex by distributor: 5.1.2. Transmission In 9M26, the transmission companies’ Capex amounted to R$ 342 million, fully used for the final investment in transmission lots. 5.2. Generation and Customers Investments made in Generation and Customers amounted to R$ 131 million in 9M26, primarily used for the maintenance of wind farms and the industrial green solutions project. 6. INDEBTEDNESS 6.1. Debt Situation and Financial Leverage As of September 2026, Neoenergia’s consolidated net debt, including cash, cash equivalents, and securities, reached R$ 52,227 million (gross debt of R$ 71,674 million). This represents an increase of 7% (R$ 3,485 million) compared to December 2025, primarily driven by capital expenditure (Capex) for grid projects. Regarding the breakdown of the outstanding debt, 88% of Neoenergia’s debt is classified as long-term, while 12% is classified as short-term. 9M26 9M25 ∆ % 9M26 9M25 ∆ % 9M26 9M25 ∆ % 9M26 9M25 ∆ % 9M26 9M25 ∆ % 9M26 9M25 ∆ % Network Expansion 2,307 1,937 19% 464 427 9% 212 245 (14%) 565 521 8% 90 70 29% 3,637 3,200 14% Luz para Todos Program 248 285 (13%) - - - - - - - - - - - - 248 285 (13%) New Connections 1,058 950 11% 342 344 (1%) 151 153 (2%) 332 366 (9%) 53 34 59% 1,936 1,847 5% New SE's and RD's 1,000 701 43% 122 83 47% 61 92 (33%) 233 155 51% 36 36 0% 1,453 1,067 36% Assets Renewal 340 295 15% 351 130 171% 57 58 (1%) 172 121 42% 86 67 27% 1,006 670 50% Network Improvement 153 174 (12%) 85 46 87% 72 46 56% 80 70 15% 48 34 44% 438 369 19% Losses and Default 76 65 16% 95 84 14% 11 7 61% 7 6 8% 35 22 56% 224 184 21% Other 203 271 (25%) 224 74 204% 55 49 11% 152 113 34% 66 47 42% 700 554 26% Movement of Material (Inventory x Works) 151 91 66% 78 18 338% 40 28 40% 13 15 N/A 16 39 (60%) 297 191 55% (=) Gross Investment 3,229 2,832 14% 1,297 778 67% 447 433 3% 989 846 17% 340 279 22% 6,302 5,169 22% GRANTS (198) (75) 164% (6) (9) (31%) (7) (20) (63%) (93) (58) 61% (17) (10) 65% (321) (172) 87% (=) Net Investment 3,032 2,758 10% 1,291 769 68% 439 414 6% 896 789 14% 323 269 20% 5,981 4,997 20% Movement of Material (Inventory x Works) (151) (91) 66% (78) (18) 338% (40) (28) 40% (13) (15) N/A (16) (39) (60%) (297) (191) N/A (=) CAPEX 2,881 2,667 8% 1,213 751 62% 399 385 4% 883 773 14% 308 230 34% 5,684 4,806 18% Regulatory Annuity Basis 203 271 (25%) 224 74 204% 55 49 11% 152 113 34% 66 47 42% 700 554 26% Regulatory Remuneration Basis 2,875 2,470 16% 996 686 45% 352 356 (1%) 824 718 15% 258 193 34% 5,306 4,424 20% CONSOLIDATEDINVESTMENTS MADE (amounts in R$ MN)
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 29 The financial indicator Total Net debt/EBITDA increased from 3.41x in December 2025 to 3.44x in September 2026. Considering the impact of the transmission assets incorporated in September 2026 on last -twelve-month EBITDA, the Total Net Debt/EBITDA ratio would have reached 3.29x as of September 2026. 6.2. Debt amortization schedule The Company seeks to align its debt structure with the financial cycle of its business, considering the specific characteristics of each company and the characteristics of their concessions and authorizations. Aiming at efficiency by reducing the cost of debt and extending its amortization profile, the Company actively manages its financial liabilities to avoid concentration of debt maturities. The amounts maturing in the coming years are not concentrated in any specific period and are consistent with the volumes matured in recent fiscal years. In 2026, the largest concentrations of debt payments concern Neoenergia Coelba with the estimated amount of R$ 688 million; Neoenergia Pernambuco, with R$ 396 million; and Neoenergia Brasília, with R$ 300 million. The sum of the maturities for these distribution companies accounts for 57% of the consolidated volume to be amortized during this period. 7,893 8,448 52,227 48,742 50,423 63,226 19,447 58,316 71,674 Gross Debt Dec'25 Gross Debt Sept'26 Cash and Equivalent Sept'26 Net Debt Sept'26 Net Debt Dec'25 Short Term Long Term R$ MN
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 30 In 2027, the largest concentrations of debt payments concern Neoenergia Coelba, with the estimated amount of R$ 1.2 billion; Neoenergia Elektro, with R$ 983 million; Neoenergia Holding, with R$ 856 million; Neoenergia Brasília, with R$ 700 million; and Neoenergia Pernambuco, with R$ 541 million. The sum of the maturities for these companies accounts for 77% of the consolidated volume to be amortized during this period. As of September 2026, the average maturity of Neoenergia’s debt was 5.60 years (compared to 5.71 years in December 2025). The chart below displays the schedule of maturities of the debt principal and interest, utilizing market forward curves for the indices and currencies linked to the debt outstanding at the end of the third quarter of 2026 (3Q26). 6.3. Debt profile The charts below display the debt balance, broken down by source of funding and by indexer. The consolidated average cost of the debt in September 2026 was 11.6% (vs. 11.9% in December 2025). In the third quarter of 2026 (3Q26), we raised a total of R$ 1 0.4 billion. Key debt disbursements include the following: i. A "4131" loan disbursement from Iberdrola to Neoenergia, totaling R$ 9.4 billion with a 4 -year term, with the corresponding issuance of debentures by the Group’s distribution companies with the same maturity: NET DEBT PER INDEX (post swap) DEBT PER FUNDING 56% 16% 11% 17% Domestic Capital Markets National Development Banks International Development Banks International Commercial Banks 49%50% 1% IPCA CDI and SELIC TJLP
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 31 a. 25th series of debentures by Neoenergia Coelba, totaling R$ 3.9 billion; b. 19th series of debentures by Neoenergia Pernambuco, totaling R$ 2.8 billion; c. 7th series of debentures by Neoenergia Brasília, totaling R$ 1.4 billion ; d. 20th series of debentures by Neoenergia Elektro, totaling R$ 1.0 billion; e. 15th series of debentures by Neoenergia Cosern, totaling R$ 300 million . ii. Financing from the EIB (European Investment Bank) for Neoenergia Elektro, totaling R$ 883 million with a 10-year term; iii. A "4131" loan disbursement from Crédit Agricole to Neoenergia Brasília, totaling R$ 150 million with a 1 - year term; iv. Financing from BNB (Banco do Nordeste) for Alto Paranaíba, totaling R$ 45 million with a 20 -year term. 7. RATING On March 17, 2026, Standard & Poor’s (S&P) reaffirmed the rating of Neoenergia and its distribution companies at “BB” on the Global Scale, capped by the sovereign rating. On the Brazil National Scale, the rating for the company and its subsidiaries is ‘brAAA’. 8. ESG Neoenergia maintains a robust Governance and Sustainability System, which guides the management of its business and its relationships with stakeholders. Defined by the Board of Directors, the company’s strategy is based on creating sustainable value by providing renewable, efficient, and affordable energy, balancing economic growth, environmental responsibility, and social development. In this context, the company contributes to the electrification of the economy through sustainable energy solutions based on renewable sources, operating in alignment with its Governance and Sustainability System and the corporate policies that guide its activities—such as the Sustainable Development Policy and the Respect for Human Rights Policy. Neoenergia also reinforces its commitment to global initiatives, including the UN Global Compact and the Sustainable Development Goals (SDGs). Sustainability is integrated into the company’s business strategy by establishing targets, the continuous monitoring of indicators, and the ongoing improvement of its management practices. This approach drives progress in priority areas such as energy transition, technological innovation, social development, and the creation of shared value for customers, employees, investors, and communities. The results and progress achieved along this path are reported annually in Neoenergia’s Sustainability Report, which underscores the company’s commitment to transparency, accountability, and the generation of positive and lasting impacts for society. Third Quarter Highlights As part of its ongoing strategy for energy transition and the modernization of electrical infrastructure, Neoenergia has begun upgrade work on the distribution grid in Ilhabela, on the coast of São Paulo. The project entails a complex logistical and operational undertaking, carried out in compliance with strict environmental criteria and with due regard for the
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 32 region’s specific characteristics. This initiative will directly benefit more than 36,000 residents, as well as the thousands of tourists who visit the municipality each year, by enhancing the reliability and quality of the power supply. Reinforcing its commitment to energy efficiency and the dissemination of knowledge, Neoenergia and ANEEL (Brazilian Electricity Regulatory Agency) have inaugurated the ANEEL Museum of Energy Efficiency in Brasília —a cultural and educational space developed by means of the Energy Efficiency Program (PEE). The museum was designed to broaden public access to topics concerning energy, innovation, and the conscious use of energy, offering immersive experiences and educational activities tailored for students, teachers, researchers, and the general public. With an expected annual footfall of over 28,000 visitors and the capacity to provide training to approximately 13,000 people per year in its "Maker Space," the initiative strengthens the company’s efforts to promote education, sustainability, and awareness regarding the efficient use of energy resources. Neoenergia has also intensified its efforts to engage schools within its concession area, aiming to increase student participation in the 2026 edition of the National Energy Efficiency Olympiad (ONEE). Organized by ANEEL , as part of the Energy Efficiency Program (PEE) , and coordinated by ABRADEE, this initiative promotes awareness regarding energy efficiency, sustainability, and innovation through educational challenges and interactive activities. With the involvement of the group’s utility companies, the Olympiad engages students and teachers from the final years of elementary school through high school, helping to shape a new generation that is more conscious of responsible energy use and the challenges of the energy transition. In the social sphere, a key highlight for the quarter was the completion of the second group of the "Potencialize" Program—a strategic initiative focused on the professional development and career boosting of Black employees at Neoenergia. More than 50 professionals completed the program, which combines training in management and leadership, practical projects, business exposure, mentorship, and dedicated spaces for listening and exchanging knowledge. The program fosters talent development and contributes to advancing the company’s diversity, equity, and inclusion agenda. Since its inception, the initiative has delivered significant results, with 40% of participants receiving promotions—a tes tament to its effectiveness in preparing leaders and strengthening a more inclusive organizational culture. Neoenergia has also expanded its positive impact on education and sustainability through initiatives aimed at youth development and the strengthening of local communities. In partnership with UNICEF, the company recognized 12 public schools across Bahia, P ernambuco, Rio Grande do Norte, and the Federal District for their socio -environmental education projects, developed under the "#EntreNoClima" (Join the Climate Action) call for proposals, which focuses on nature-based education. As part of the award, the institutions will receive solar photovoltaic power generation systems, sponsored by the Energy Efficiency Program (PEE). This will help reduce energy costs and encourage the adoption of sustainable practices within the school environment. By way of Instituto Neoenergia, the company also launched the "Energia Raiz" (Root Energy) campaign, reinforcing its strategy to decentralize social investment and strengthen initiatives within the areas where it operates. In 2025, the Institute invested in 166 projects —83% of which were carried out outside of major capital cities —thereby expanding the reach of these efforts to historically underserved regions and fostering social development by valuing local communities. Also, within the realm of education, the Instituto Neoenergia launched "Diáspora Tech," a program developed in partnership with “Obará Edutech” to train teachers and educational staff on topics such as artificial intelligence, critical thinking, and digital equity. The initiative supports educators in developing skills related to computational thinking and digital culture, contributing to an educational approach that is more innovative, inclusive, and prepared for the challenges
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 33 of technological transformation. Together, these initiatives underscore Neoenergia’s commitment to promoting education, social inclusion, and sustainable development in the communities where it operates. The company’s commitment to ethics, transparency, and best governance practices has once again been recognized with the "Empresa Pró -Ética" seal for 2025 –2026. This marks the sixth consecutive time Neoenergia has received this certification from the Office of the Comptroller General (CGU), which honors organizations that serve as benchmarks in promoting integrity, preventing corruption, and strengthening ethical and transparent business environments. In this edition, NC Energia—the group’s energy trading arm—was also recognized for the first time. The quarter was also marked by significant external recognition, reinforcing the relevance of the company’s efforts in sustainability, innovation, and operational excellence. Neoenergia was honored at the “Iniciativas que Impactam” (Initiatives that Make an Impact) event—hosted by the Official Spanish Chamber of Commerce in Brazil in partnership with the Embassy of Spain , with five of its projects receiving recognition: the School for Female Electricians, *Junt+s*, Solar Panel Recycling, “Noronha Verde ”, and Green Hydrogen. The awards highlight organizations that generate a positive impact and promote sustainable development within the communities where they operate. In the electricity sector, the Neoenergia Group maintained its prominent position at the 2026 Abradee Awards, securing seven trophies out of 11 nominations. For the second consecutive year, Neoenergia Cosern was recognized as the best energy distributor in Brazil in the national category, while Neoenergia Elektro took second place. The group’s companies also stood out in the categories of Management Quality, Innovation Management, and Economic-Financial Management, as well as through regional recognitions, demonstrating consistent operational and management performance across all their distribution companies. The company was also recognized at the National Electric Sector Circuit (CINASE) —the largest traveling event for the Brazilian electric power industry —reinforcing its leadership in innovation, technology, and operational excellence. This commitment to innovation was further highlighted at the 2026 Energy Summit Awards, one of the energy sector’s premier global awards, where Neoenergia secured three honors, solidifying its position as a benchmark for technological development and solutions geared toward the energy transition. 9. OTHER MATTERS 9.1. Low-Income Customers 9.2. Neoenergia Elektro Adjustment On August 24, 2026, Aneel approved a tariff adjustment for Neoenergia Elektro, resulting in an average impact of 9.58% on consumer rates, effective as of August 27, 2026. The variation in Parcel A (non-controllable costs) was 3.44%, totaling R$ 7,300 million, driven primarily by a 7.27% increase in transmission costs. The average pass-through price for energy purchase agreements was set at R$ 259.76/MWh. The Number of Residential Customers (thousand) Consolidated Consolidated Conventional 11,309 4,316 2,608 1,095 2,301 990 11,113 4,206 2,553 1,026 2,374 953 Low Income 4,138 2,010 1,275 374 364 115 4,005 1,973 1,250 413 253 116 Total 15,447 6,327 3,883 1,469 2,664 1,104 15,118 6,179 3,804 1,439 2,627 1,069 3Q26 3Q25
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 34 variation in Parcel B (controllable costs) was 2.36%, reflecting a cumulative inflation of 4.72% since the last adjustment — calculated based on a pro-rata combination of the IGP-M and IPCA indices, in accordance with the date the amendment to the contract was signed —minus the "X -Factor" of 2.36%. Additionally, under the terms of the new contractual amendment, the U nrecoverable Revenues were reclassified from Parcel B to Parcel A. Furthermore, a new annual adjustment mechanism was introduced for deductions related to Other Revenues, as well as Revenues from Demand Overruns and Excess Reactive power consumption. Consequently, after accounting for these deductions, the final variation for Parcel B was -1.74% (R$ 3,104 million). 9.3. Closing of Transmission Assets Transaction On September 30, 2026, closing took place for (i) the acquisition by Neoenergia of common shares of Neoenergia Transmissão—representing 1% of the shares issued by Neoenergia Transmissão previously held by Unique Power, an investment fund wholly owned by Warrington Investment Pte. Ltd.; and (ii) the disposal by Neoenergia to Unique Power of 49% of the new shares of Neoenergia Transmissão, issued as a result of a capital increase carried out by the Company. This capital increase was carried out by means of the contribution of all equity interests held by the Company in the transmission entities Neoenergia Guanabara, Neoenergia Vale do Itajaí, Potiguar Sul, Neoenergia Morro do Chapéu, Neoenergia Estreito, Neoenergia Alto Paranaíba, and Neoenergia Paraíso, as provided for in the Share Purchase Agreement. As a result of the transaction, the Company now holds 51% of the total share capital of Neoenergia Transmissão, thereby assuming control of the entity—control which, since September 2023, had been shared with Unique Power and Warrington. 9.4. Neoenergia Brasília Tariff Review On October 20, 2026, Aneel approved Neoenergia Brasília’s tariff review, with an average impact on consumers of 1.92%, effective as of October 22, 2026. Parcel B reached R$ 820 million, representing a 14.4% increase compared with the amount recorded over the previous 12 months, net of other revenues and revenues from excess over demand and surplus reactive energy. Parcel A was set at R$ 3,173 million, representing a 3.1% increase over the period and contributing 2.5% to the final tariff adjustment. Financial components contributed -3.3% to the final tariff adjustment. The approved Net Regulatory Asset Base amounted to R$ 2,195 million, at October 2026 values, reflecting the full recognition of investments made. The Tariff Review was approved on a provisional basis to allow for an assessment of the market data considered in the tariff-setting process, following the implementation of the new commercial system. Should any adjustments be required, they will be made as part of the 2027 tariff adjustment process. Complete information on the Tariff Review is available in the results of Public Consultation (CP) No. 24/2026, available on Aneel’s website.
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 35 10. RECONCILIATION NOTE Neoenergia presents its results for the 3Q26 and 9M26 based on management analyses that the company’s Board of Directors believes to reflect the company’s business in the best manner, in line with the international interim financial reporting standards (International Financial Reporting Standards – IFRS). Calculation Memory (CONSOLIDATED) 3Q26 3Q25 9M26 9M25 Corresponding Explanatory Notes ( + ) Net Revenue 12,270 13,485 38,150 38,626 Income Statement ( - ) Estimated Replacement Value of Concession (7) (276) (1,022) (1,382) Note 5 ( - ) Other revenues (339) (255) (848) (753) Note 5 ( - ) Other revenues 31 (12) (8) 41 Note 5.3 ( + ) Contractual and regulatory penalties (18) (17) (48) (78) Note 5.3 ( + ) Revenue from Operation and Maintenance 61 46 140 131 Note 5.3 ( + ) Photovoltaic Operations 22 0 23 0 Note 5.3 ( + ) Other revenues - Other revenues 2 1 5 6 Note 5.3 = Net Operating REVENUE 12,022 12,972 36,392 36,591 ( + ) Costs with electric energy (5,453) (6,139) (16,984) (16,425) Income Statement ( + ) Fuel for energy production (24) (25) (93) (82) Note 8 ( + ) Construction costs (2,003) (2,524) (6,143) (7,548) Income Statement ( + ) Photovoltaic Operations (24) (4) (26) (5) Note 8 = Energy costs (7,504) (8,692) (23,246) (24,060) ( + ) Estimated replacement value of concession 7 276 1,022 1,382 Note 5 = GROSS MARGIN 4,525 4,556 14,168 13,913 ( + ) Operating costs (1,582) (1,394) (4,465) (4,168) Income Statement ( + ) Sales expenses (98) (90) (294) (274) Income Statement ( + ) Other general and administrative revenues/expenses (530) (593) (1,751) (1,755) Income Statement ( - ) Fuel for energy production 24 25 93 82 Note 8 ( - ) Photovoltaic Operations 24 4 26 5 Note 8 ( - ) Depreciation 770 729 2,250 2,213 Note 8 ( + ) Other revenues 339 255 848 753 Note 5 ( - ) Gain/Loss on RAP (31) 12 8 (41) Note 5.3 ( - ) Contractual and regulatory penalties 18 17 48 78 Note 5.3 ( - ) Revenue from operation and maintenance (61) (46) (140) (131) Note 5.3 ( - ) Photovoltaic Operations (22) 0 (23) 0 Note 5.3 ( - ) Other revenues - Other revenues (2) (1) (5) (6) Note 5.3 = Operating Expenses (PMSO) (1,151) (1,082) (3,405) (3,244) Provisions for Delinquency (PECLD) (143) (117) (449) (415) Income Statement ( + ) Equity Income / ( - ) Fair value Adjustment - Investment 345 31 913 62 Income Statement EBITDA 3,576 3,388 11,227 10,316 ( + ) Depreciation and Amortization (770) (729) (2,250) (2,213) Income Statement and Note 8 ( + ) Financial Income/Loss (1,413) (1,512) (4,870) (4,448) Income Statement ( + ) IR/CS (206) (217) (720) (79) Income Statement ( + ) Minority shareholders (10) (6) (26) (20) Income Statement NET INCOME 1,177 924 3,361 3,556 Income Statement
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 36 ANNEX I – Management DREs by Business (base date 09/30/2026): R$ % R$ % R$ % R$ % R$ % R$ % GROSS MARGIN 4,057 4,032 25 1% 13,022 12,575 447 4% 478 538 (60) (11%) 1,173 1,377 (204) (15%) (10) (14) 4 (29%) (27) (39) 12 (31%) Operating Expenses (942) (899) (43) 5% (2,806) (2,657) (149) 6% (120) (125) 5 (4%) (356) (395) 39 (10%) (89) (58) (31) 53% (243) (192) (51) 27% Provisions for Delinquency (PECLD) (142) (116) (26) 22% (447) (414) (33) 8% (1) (1) - 0% (2) (1) (1) 100% - - - - - - - - (+) Equity Income / Corporate Operations 374 43 331 770% 434 46 388 843% (29) (18) (11) 61% 479 10 469 4690% - 6 (6) (100%) - 6 (6) (100%) EBITDA 3,347 3,060 287 9% 10,203 9,550 653 7% 328 394 (66) (17%) 1,294 991 303 31% (99) (66) (33) 50% (270) (225) (45) 20% Depreciation (646) (583) (63) 11% (1,876) (1,716) (160) 9% (88) (88) - 0% (260) (322) 62 (19%) (36) (58) 22 (38%) (114) (175) 61 (35%) Financial Income (Loss) (1,438) (1,484) 46 (3%) (4,775) (4,288) (487) 11% 4 (7) 11 N/A (45) (93) 48 (52%) 21 (21) 42 N/A (50) (67) 17 (25%) IR CS (164) (174) 10 (6%) (611) 22 (633) N/A (42) (50) 8 (16%) (111) (123) 12 (10%) - 7 (7) (100%) 2 22 (20) (91%) Removals (Minority Shareholdings) - - - - - - - - - - - - - - - - (10) (6) (4) 67% (26) (20) (6) 30% NET INCOME 1,099 819 280 34% 2,941 3,568 (627) (18%) 202 249 (47) (19%) 878 453 425 94% (124) (144) 20 (14%) (458) (465) 7 (2%) 9M25STATEMENT OF INCOME (R$ MN) 3Q26 3Q25 Variation 9M26 9M25 NETWORKS GENERATION AND CUSTOMERS VariationVariation 3Q26 3Q25 Variation 9M26 OTHERS 3Q26 3Q25 Variation 9M26 9M25 Variation
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 37 ANNEX II – Balance Sheet by Business (base date 09/30/2026): Others STATEMENT OF FINANCIAL POSITION - R$ Million Distribution Transmission Total networks Wind farms and solar parks Hydro plants Thermo plants Commercialization and services Total Generation and Customers Total CURRENT ASSETS Cash and cash equivalents 12,182 1,111 13,293 1,155 178 109 181 1,623 2,853 17,769 Trade accounts receivable and others 10,618 237 10,855 121 - 22 191 334 - 11,189 Securities and marketable securities 835 39 874 7 - - - 7 - 881 Derivative financial instruments 67 - 67 - - - - - - 67 Sectoral financial assets (Portion A and others) 940 - 940 - - - - - - 940 Public Service Concession (Contract asset) - 2,349 2,349 - - - - - - 2,349 Other current assets 3,617 295 3,912 70 23 47 34 174 241 4,327 TOTAL CURRENT ASSETS 28,259 4,031 32,290 1,353 201 178 406 2,138 3,094 37,522 NON-CURRENT ASSETS Trade accounts receivable and others 381 - 381 - - - 12 12 - 393 Securities and marketable securities 100 13 113 582 - - 2 584 100 797 Derivative financial instruments 164 - 164 6 - - - 6 29 199 Sectoral financial assets (Portion A and others) 28 - 28 - - - - - - 28 Public service Concession (financial assets) 2,279 - 2,279 - - - - - - 2,279 Public service Concession (contractual assets) 6,629 24,421 31,050 - - - - - - 31,050 Investments in subsidiaries, associates and joint ventures - - - - 718 - 8 726 - 726 Right of use 180 6 186 41 1 - 2 44 2 232 Property, Plant & Equipment ("PP&E") - 46 46 7,383 1,016 882 13 9,294 66 9,406 Intangible assets 50,054 110 50,164 112 652 1 47 812 1 50,977 Other non-current assets 4,779 934 5,713 401 20 143 62 626 337 6,676 TOTAL NON-CURRENT ASSETS 64,594 25,530 90,124 8,525 2,407 1,026 146 12,104 535 102,763 TOTAL ASSETS 92,853 29,561 122,414 9,878 2,608 1,204 552 14,242 3,629 140,285 CURRENT LIABILITIES Suppliers and accounts payable to contractors and covenant contracts 4,182 115 4,297 97 12 17 67 193 150 4,640 Loans and financing 5,660 1,183 6,843 257 1 - - 258 856 7,957 Derivative financial instruments 305 124 429 - - 3 7 10 119 558 Sectoral financial liabilities (Portion A and others) 354 - 354 - - - - - - 354 Other current liabilities 5,525 980 6,505 742 44 9 192 987 - 88 7,404 TOTAL CURRENT LIABILITIES 16,026 2,402 18,428 1,096 57 29 266 1,448 1,037 20,913 NON-CURRENT LIABILITIES Suppliers and accounts payable to contractors and covenant contracts 245 - 245 - - - - - - 245 Loans and financing 38,209 8,053 46,262 2,829 150 - - 2,979 12,995 62,236 Derivative financial instruments 685 5 690 - - - 2 2 497 1,189 Sectoral financial liabilities (Portion A and others) 1,379 - 1,379 - - - - - - 1,379 Other non-current liabilities 15,450 5,129 20,579 291 229 50 64 634 - 9,428 11,785 TOTAL NON-CURRENT LIABILITIES 55,968 13,187 69,155 3,120 379 50 66 3,615 4,064 76,834 TOTAL LIABILITIES 71,994 15,589 87,583 4,216 436 79 332 5,063 5,101 97,747 NET EQUITY Attributable to controlling interest 20,763 7,700 28,463 5,640 1,909 1,125 220 8,894 (1,211) 36,146 Attributable to non-controlling interest 96 6,271 6,367 22 263 - - 285 (260) 6,392 TOTAL NET EQUITY 20,859 13,971 34,830 5,662 2,172 1,125 220 9,179 (1,471) 42,538 TOTAL LIABILITIES AND NET EQUITY 92,853 29,560 122,413 9,878 2,608 1,204 552 14,242 3,630 140,285 DEBT Gross debt ASSETS CURRENT ASSETS Cash and cash equivalents 12,182 1,111 13,293 1,155 178 109 181 1,623 2,853 17,769 Securities and marketable securities 835 39 874 7 - - - 7 - 881 Derivative financial instruments 67 - 67 - - - - - - 67 NON-CURRENT ASSETS Securities and marketable securities 100 13 113 582 - - 2 584 100 797 Derivative financial instruments 164 - 164 6 - - - 6 29 199 LIABILITIES CURRENT LIABILITIES Loans and financing 5,660 1,183 6,843 257 1 - - 258 856 7,957 Derivative financial instruments 305 124 429 - - 3 7 10 119 558 NON-CURRENT LIABILITIES Loans and financing 38,209 8,053 46,262 2,829 150 - - 2,979 12,995 62,236 Derivative financial instruments 685 5 690 - - - 2 2 497 1,189 Total Gross Debt 44,628 9,365 53,993 3,080 151 3 9 3,243 14,438 71,674 Total Net Debt 31,511 8,202 39,713 1,336 (27) (106) (174) 1,029 11,485 52,227 Consolidated Generation and CustomersNetworks
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 38 ANNEX III – Consolidated Cash Flow (base date 09/30/2026): OPERATING ACTIVITIES CASH FLOW - R$ Million 9M26 9M25 Net Income for the Period/Fiscal Year 3,387 3,576 Adjusted by: Depreciation and amortization 2,300 2,259 Write-off of non-current assets 157 116 Equity Income (53) 1 Fair value adjustment/ Impairment (860) (63) Income taxes paid 720 79 Financial income (expenses), net 4,870 4,448 Concession’s estimated replacement value (1,022) (1,382) Changes in working capital: Receivables from clients and other (340) (203) Public Service Concession (Contract assets - Transmission) (713) (3,649) Suppliers and accounts payable to contractors and convenant contracts (249) 17 Wages, employment benefits and charges payable, net (148) (160) Sectoral financial assets and liabilities, net (Portion A and others) (357) (979) Other recoverable (payable) taxes and sectoral charges, net (362) 93 Provisions, net of judicial deposits 28 (184) Other net assets and liabilities (826) (33) Net Cash generated from operations 6,532 3,936 Dividends and interest on own capital received 85 85 Payment of debt charges (3,171) (2,546) Derivative financial instruments paid, net (806) (859) Income from financial investments 815 657 Payment of interest – Leases (30) (24) Income taxes paid (211) (271) Cash generated by operating activities 3,214 978 Cash flow from investing activities Divestiture of equity interest - Geração Céu Azul S.A. - 1,050 Disposal of equity interest - Neoenergia Itabapoana (Note 15.3) - 115 Cash acquired in business combination (Note 15.4) 155 - Divestiture of equity interest – Energética Águas da Pedra S.A 2,077 - Consideration transferred for the acquisition of control (Note 15.4) (49) - Acquisition of property, plant and equipment and intangible assets (162) (182) Capital increase in investees (5) (3) Public service concession (Contract asset – Distribution) (6,121) (5,087) Acquisition of securities and marketable securities (2,601) (1,024) Redemption of debt securities and marketable securities 2,183 938 Cash flow generated by (used in) investing activities (4,523) (4,193) Cash flow from financing activities Funds raised through loans and financing 17,532 6,915 Payment of fundraising costs (185) (235) Amortization of principal from loans and financing (7,555) (6,039) Collateral deposits (130) (36) Public Service Concessions obligations 335 203 Payment of principal - Leases (60) (56) Derivative financial instruments received (paid), net (58) 760 Dividends and interest on own capital paid to controlling interest (984) - Dividends and interest on own capital paid to non-controlling interest (1) (2) Capital increase 701 - Disposal of equity interest in subsidiaries 1,731 23 Repurchase of treasury shares (701) (5) Cash flow generated by financing activities 10,625 1,528 Increase (decrease) in cash and cash equivalents for the period 9,316 (1,687) Cash and cash equivalents at the beginning of the period 8,453 7,730 Cash and cash equivalents at the end of the period 17,769 6,043
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Results as of September 30, 2026 Disclosed on October 20, 2026 NEOENERGIA S.A. | RELEASE 3Q26 39 This document was prepared by NEOENERGIA S.A. with the purpose of indicating the general situation and progress of the Company’s business. This document is the property of NEOENERGIA and must not be used for any other purpose without prior written authorization of NEOENERGIA. The information contained in this document reflects current conditions and our point of view as of this date and is subject to change. The document contains statements that represent NEOENERGIA’s expectations and projections regarding future events. These expectations involve various risks and uncertainties, and therefore actual results and outcomes may differ from those discussed herein, and the Company cannot guarantee their realization. All relevant information regarding the period and used by the Management in the running of the Company is presented in this document and on the Financial Statements. Further information about the Company can be found in the Reference Form available on the CVM website and on the Neoenergia Group’s Investor Relations website (ri.neoenergia.com). DISCLAIMER