Regaining Financial Solidity

2018 Regaining Financial Solidity

DISCLAIMER 2 Some statements and estimates in this material may represent expectations about future events or results that involve risks and uncertainties known and unknown. There is no guarantee that the events or results referred to in these expectations will occur. These expectations are based on present assumptions and analyses from the viewpoint of our management, based on their experience, the macroeconomic environment, market conditions in the energy sector and our expected future results, many of which are not under Cemig s control. Important factors that can lead to significant differences between actual results and projections about future events or results include Cemig s business strategy, Brazilian and international economic conditions, technology, Cemig s financial strategy, changes in the energy sector, hydrological conditions, conditions in the financial markets, uncertainty regarding future results of operations, plans and objectives as well as other factors. Because of these and other factors, our actual results may differ significantly from those indicated in or implied by these statements. The information and opinions contained herein should not be understood as a recommendation to potential investors and no investment decision should be based on the truthfulness, or completeness as of the date hereof of this information or these opinions. None of Cemig s professionals nor any of their related parties or representatives shall have any liability for any losses that may result from the use of the content of this presentation. To evaluate the risks and uncertainties as they relate to Cemig, and to obtain additional information about factors that could lead to different results from those estimated by Cemig, please consult the section on Risk Factors included in our Formulário de Referência filed with the Brazilian Securities Commission CVM, and in Form 20-F filed with the U.S. Securities and Exchange Commission SEC. In this material, financial amounts are in R$ million (R$ mn) unless otherwise stated. Financial data reflect the adoption of IFRS

LEADER Brazil s Leading Power Utility 3 Integrated Power Utility in Brazil Market share in the free market 1st (2) 6th 1st (2) 4th Market Cap EBITDA 2017 US$4.3B (1) US$1.1B (3) In the Power Industry since 1952 (1) As of October 31 sh, 2018 (2) In the Brazilian Energy Industry (3) U$3.3080 on December 29 th,2017

POWER UTILITY Cemig: in Numbers 4 116 Power plants 82 32 1 1 5.9 GW Total installed capacity 567,634 km Electricity Distribution lines 8,200 km Power Transmission lines

SHAREHOLDER STRUCTURE Cemig at a Glance 5 B N D E S P A R F I A D i n â m i c a F r e e F l o a t 51% ON 0% PN 17% Total 11% ON 5% Total 9% ON 7% Total 29% ON 71% Total 3% PN 6% PN 91% PN 1 Based in State of Minas Gerais 2 3 Among the most liquid stocks in Brazil s electricity sector Solid dividend policy Minimum 50% payout ratio Minimum R$0.50 per preferred share listed on New York, São Paulo and Madrid More than 140,000 shareholders in 38 countries Average daily trading volume in Oct/2018 (preferred share) R$100,0M in Bovespa and US$10.4M in NYSE

INTEGRATED Cemig is Uniquely Positioned 6 Presence in 23 states AC RR AM RO MT PA AP TO MA PI BA CE RN PB PE AL SE GO DF MG Integrated Power Utility in Brazil MS SP ES PR RJ SC RS (1) 1st 2nd 4th Power Generation Eletricity Distributor Largest Power Transmission Group Largest Power Generation Group Power Transmission Electricity Distribution Cemig Free Consumer Clients Wind Power Generation Natural Gas Distribution (1) In terms of length of electricity distribution lines

RENEWABLE LEADER Leader in Renewable Hydro Power Energy 7 Power Generation by Source 7% 8% 1% 16% 11% 64% 98% 66% 1% 27% 1% World 2015 Brazil 2017 Cemig 2017 Fossil Source Fuels Nuclear Hydro Others Source: EPE [BEN 2017 Preliminar Results and IEA [Key World EnergyStatistics-2015]

CASH GENERATION R$ million 8 6,382 5,538 Ebitda 4,272 Net Income 2,469 Includes non-recurring gain of R$1,572 million with the CRC s (Accounts receivable from Minas Gerais State government) anticipated settlement. 2,638 3,492 3,469 1,001 925 1,817 1H18 335 404 1H18 2014 2015 2016 2017 LTM 2014 2015 2016 2017 LTM 1H18 Breakdown of Ebitda Diversified, Low Risk Business Portfolio 1H17 812 635 1,240 325 45 346 223 31 Generation Transmission Distribution Others Most of the revenues are inflation protected

Solid dividend policy 9 Bylaws Guaranteed - The minimum annual dividend Shares Number of Shares Guarantee Minimum Annual Common 487,614,213 - Preferred 971,138,388 R$ 0.50 R$ 485.569.194 Total 1,458,752,601 - R$ 485.569.194 Minimum payout 50% of the net profit 2018 - Dividend yield 5.9%* R$0.50 per preferred share R$0.03 per common share To be paid in a single installment by December 30, 2018 * Considering share price as of December 30, 2017

STABILITY Balance Sheet 10 3.8x Net debt to Ebitda 1H18 26% Debt in foreign currency * 1.3 R$ billion Cash on hand 10.4 R$ billion Net Revenue 1H18 * Debt in Dollar converted into CDI percentage per hedging instrument, within a band of Exchange variation

2017 PROJECTION Ebitda* LAJIDA 2017* Cemig D Cemig GT PUT Light Light Put Venda Sale of de assets Ativos Participadas** Equities Outros Other Guidance 2018 guidance 2018 Cemig D Cemig GT Participadas** Equities PUT Light Light Put Venda Sale of de assets Ativos Other Outros Guidance 2019 guidance 2019 2018 Consolidated Guidance 11 3,189 713 10 176 100 15 28 4,228 3,795 536 206 168 63 10 100 5,133 4,733 2018 2019 Net debt/ebitda*** Reprofiling Net debt/ebitda*** Eurobond Limite Projeção Guidance Limite Projeção Guidance 4.50 4.50 4.25 4.25 3.50 5.00 5.00 4.25 4.25 3.50 3.28 3.36 3.16 2.78 2.56 3.58 3.60 3.28 2.86 2.61 2017 jun18 dez18 jun19 dez19 2017 jun18 dez18 jun19 dez19 * Recurring 2017 Ebitda. ** Refers to total of companies in which Cemig H has equity interests, other than Cemig D and Cemig GT. *** Net debt and Ebitda are adjusted according to the definitions in the debt contracts. Source: Cemig. Ebitda IFRS - Constant June 2018 R$ mn

Cemig - consolidated debt profile* 12 R$ million Maturities timetable Total net debt: R$13.3 billion Average tenor: 3.9 years 4,046 Maturities timetable after Retap Consolidated debt (in R$ of July 2018) - including expectation of use of 2nd Eurobond tranche Average tenor: 4.4 years 1,907 1,709 2,059 1,974 2,363 2,003 227 224 2018 2019 2020 2021 2022 2023 2024 After 2024 Cemig GT: amortized R$ 533 million in Debentures and made early repayment of R$ 385 million, with proceeds of the second Eurobond tranche. 116 126 4,046 533 837 1,848 2,248 2,003 828 1,222 227 224 348 2018 2019 2020 2021 2022 2023 2024 After após 2024 Sem Without alteração Rolagem Payment Retap with Pag Retap Retap amortização Amortization change Retap proceeds Cost of debt % p.a. Leverage % 14.28 3.74 15.89 8.40 12.03 10.39 8.97 7.22 9.09 8.72 9.19 48% 25% 26% 1% 6.01 5.77 4.65 2015 2016 jun/17 set/17 2017 mar/18 jun/18 Real Nominal *As of June 2018 CDI IPCA DOLLAR OTHER

LEVERAGE Cemig GT debt profile* 13 R$ million Maturities timetable Average tenor: 4.1 years Main indexors Total net debt: R$7.9 billion 3,794 14% 42% 1,487 897 1,074 1,057 332-44% 2018 2019 2020 2021 2022 2023 2024 CDI IPCA DOLLAR Cost of debt % p.a. Leverage % 16.03 14.41 12.07 10.07 8.59 9.23 8.92 9.16 9.85 3.66 7.41 6.10 6.14 4.61 2015 2016 jun/17 set/17 2017 mar/18 jun/18 Net debt Ebitda Net debt Stockholders equity + Net debt 5.60 4.53 5.78 3.78 4.19 5.15 62.9 60.6 60.7 62.1 58.3 58.2 2016 jun/17 set/17 2017 mar/18 jun/18 *As of June 2018 Real Nominal

Cemig D debt profile* 14 R$ million 91 Maturities timetable Average tenor: 3.6 years Total net debt: R$4.9 billion 1,086 869 1,238 1,640 227 252 226 2018 2019 2020 2021 2022 2023 2024 After 2024 Main indexors 43% 55% 1% 1% RGR CDI IPCA Others Cost of debt % p.a. Leverage % 14.31 15.87 8.06 10.97 9.57 8.93 8.47 9.29 Net debt Ebitda 12.55 13.78 13.78 66.2 69.3 73.9 6.01 4.35 56.5 54.5 55.2 4.01 8.95 6.90 5.87 5.70 4.79 2015 2016 Jun/17 set/17 2017 Mar/18 Jun/18 Net debt Stockholders equity + Net debt 2016 jun/17 set/17 2017 mar/18 jun/18 *As of June 2018 Real Nominal

ASSET SALE Divestment program 15 Strategy was designed to deleverage Cemig Company Stake % Amount R$ MM Status Realized 9,86% 717 Block trade completed 25% 80 Transfer, to Taesa, completed (Nov. 2017) TOTAL 797 In progress 100% 649 (1) Auction for sale of assets concluded- August 08, 2018 - - (2) Restructuring with assets sale for settlement of pre-payments under PPA 48,86% 1.353 (3) New timetable and structure for disposal 18% 1.117 (4) Negociations with potencial purchaser resumed 51% 48 (5) Transfer of 51% position of the shares to Taesa in legal analysis Até 49% 1.180 (4) Structuring of sale model in legal analysis Consórcios de Exploração de Gás Cachoeirão, Pipoca, Paracambi 24,50% 21 (4) Auction on July 3rd, 2018 had no tenderers / Studies for a new auction 12% 1.443 (4) Negotiations between private stokholderes for sale of 50,02% 49% 125 (4) Transaction postponed to 2019 TOTAL 5.936 Notes: (1) Total value of bids won on August 8th, 18 auction (2) Under evaluation (3) Market value (BM&F Bovespa) on May 05 th, 2018: R$13,58/share (4) Book value (5) Valuation by the Company

RATING Our Credit capacity 16 Solid fundamentals assured by excellent financial management, stable profitability, strong cash generation and robust corporate governance. A-(bra) Cemig H, Cemig GT and Cemig D National Scale B+ Cemig H, Cemig GT e Cemig D Global Scale Investment Grade Speculative Grade AAA AA+ AA AA- A+ A A- BBB+ BBB BBB- BB+ BB BB- B+ B B- CCC CC C RD/D Euro bra+ Cemig H, Cemig GT and Cemig D National Scale B Cemig H, Cemig GT and Cemig D Global Scale Investment Grade Speculative Grade AAA AA+ AA AA- A+ A A- BBB+ BBB BBB- BB+ BB BB- B+ B B- CCC+ CCC CCC- CC C D Euro Baa2.br Cemig H, Cemig GT and Cemig D National Scale B1 Cemig H, Cemig GT and Cemig D Global Scale Investment Grade Speculative Grade Aaa Aa1 Aa2 Aa3 A1 A2 A3 Baa1 Baa2 Baa3 Ba1 Ba2 Ba3 B1 B2 B3 Caa1 Caa2 Caa3 Ca C

FAIR READJUSTMENT Result for Cemig D Tariff Review 17 Aneel approved readjustment in the Technical Note 45/2018 May 28 th anniversary regulatory date Main points of the Review for the 4 th Tariff Cycle: Investment around R$ 5 billion Investment on Special obligations around R$ 1.2 billion Opex: Cemig D scores above average in efficiency metrics Regulatory asset base (RAB) 2013 2018 Remuneration Base gross R$ 15,724 20,490 Remuneration Base net R$ 5,849 8,906 Average depreciation rate 3.84 % 3.84% Remuneration of the special obligations - 149 WACC 7.51% 8.09% CAIMI R$ 147 333 QRR R$ - Depreciation (Gross RAB x Dep rate) 590 787 Remuneration of capital R$ 587 1,236

POWER BALANCE Cemig GT: Supply/demand 18 Position in August, 2018 Average MW 4000 Supply Own generation Purchased 3000 2000 1000 0 2,585 2,403 2,250 1,726 1,560 1,976 1,734 1,538 1,432 1,432 1,427 1,434 1,434 1,433 1,432 1,431 1,430 1,430 1,429 1,094 674 674 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 Total Supply Current Balance Total Demand 4,019 3,837 3,683 3,158 2,991 3,406 3,164 2,967 2,526 2,106 2,101 0 212 149-101 187 838 1,517 1,720 1,335 934 941 4,019 3,625 3,534 3,259 2,804 2,568 1,647 1,247 1,191 1,172 1,160 Average MW 4000 3000 2000 1000 0 Demand 368 176 1 637 858 1,534 3,072 3,040 2,987 2,712 1,572 1,752 2,257 1,565 1,682 2,021 1,100 700 644 625 613 579 585 547 547 547 547 547 547 547 547 547 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 Sales: Regulated Market Sales: Free Market Probable renewals Spot Market

700 600 500 400 300 200 100-1.20 1.00 0.80 0.60 0.40 0.20 - SALE PRICE & GSF Average prices and the GSF* 19 0.81 0.89 0.93 0.98 1.00 1.04 334 228 204 194 205 200 190 183 148 145 156 105 2017 2018 2019 2020 2021 2022 Preço Average médio sale de price* venda PLD Spot price* GSF GSF** Source: Cemig * Generation Scaling Factor ** Constant R$/MWh

Investor Relations Tel: +55 (31) 3506-5024 ri@cemig.com.br http://ri.cemig.com.br

Cemig D 2018 Guidance 21 Constant June 2018 R$ mn 346 49 78 1,729 51 30 81 106 54 973 1,518 500 44 2,279 2,001 Net debt/ebitda* Reprofiling R$ mn 7.5 7.5 Limite Projeção Guidance 4.5 3.8 3.8 4.1 3.6 3.5 2.6 2.5 2017 jun18 dez18 dec18 jun19 dec19 dez19 Source: Cemig. * Adjusted according to definition in the debt contract. Ebitda IFRS - Constant June 2018 R$ mn

Cemig GT 2018 Guidance 22 Ebitda IFRS - Constant June 2018 R$ mn 1,731 150 140 173 88 19 1,807 1,549 248 23 1,975 1,734 Lajida Adjusted 2017* Quotas Cotas Revenue Mercado Participadas Equities Provisions Provisões Outros Other Guidance 2018 Participadas Equities Other Outros Guidance 2019 2017 Ebitda guidance 2018 guidance 2019 Net debt/ebitda* Reprofiling Limite Projeção Guidance Net debt/ebitda* Eurobond Limite Projeção Guidance 5.50 5.00 5.00 4.50 4.50 5.50 5.50 5.00 5.00 4.50 3.04 3.40 3.70 3.70 3.30 3.53 3.90 3.90 3.90 3.50 2017 jun18 dez18 jun19 dez19 2017 jun18 dez18 jun19 dez19 * Net debt and Ebitda are adjusted according to the definitions in the debt contracts. Source: Cemig.

CEMIG Guidance, 2018 22 23 4,228 5,133 4,733 5,437 5,359 5,012 4,941 5,642 5,201 3,795 2018 2019 2020 2021 2022 Breakdown of Ebitda 17% 17% 18% 18% 17% 42% 38% 40% 37% 37% 41% 44% 43% 45% 46% 2018 2019 2020 2021 2022 Source: Cemig. Constant June 2018 R$ mn Cemig D Cemig GT Holding e Co. Participações and equity interests

Summary Covenant Package (Eurobond) 24 Cemig Consolidated (Guarantor) Cemig GT (Issuer & Restricted Subsidiaries) Maintenance Covenants Leverage Maintenance Covenant Net Debt / Covenant EBITDA Cemig 31/Dec/2017 and 30/Jun/2018 5.00x 31/Dec/2018 and 30/Jun/2019 4.25x 31/Dec/2019 and 30/Jun/2020 3.50x 31/Dec/2020 and s/a thereafter 3.00x Liens Maintenance Total Secured Debt / Covenant EBITDA Cemig 31/Dec/2017 2.00x 30/Jun/2018 and semi-annually thereafter 1.75x Dividend Payments Minimum Legally Required Only Maintenance Covenants Leverage Maintenance Covenant Net Debt / Covenant EBITDA Cemig GT 31/Dec/2017 and 30/Jun/2018 5.50x 31/Dec/2018 and 30/Jun/2019 5.00x 31/Dec/2019 and 30/Jun/2020 4.50x 31/Dec/2020 and 30/jun/2021 3.00x 31/Dec/2021 and s/a thereafter 2.50x Liens Maintenance Total Secured Debt / Covenant EBITDA Cemig GT 31/Dec/2017 and semi-annually thereafter 1.50x Incurrence Covenants Limitation on Incurrence of Indebtedness Covenant Net Debt / Covenant EBITDA Cemig GT On or Before 31/Dec/2018 5.50x On or Before 31/Dec/2019 5.00x On or Before 31/Dec/2020 4.50x On or Before 31/Dec/2021 3.00x Thereafter 2.50x (+) General Basket of US$100mm or 3% of CNTA Limitation on Incurrence of Liens Total Secured Debt / Covenant EBITDA 1.50x Restricted Payments % of Net Income from Sept. 30, 2017 Cemig GT If Cov. Net Debt / Cov. EBITDA > 2.5x 0% If Cov. Net Debt / Cov. EBITDA 2.5x 50% (+) Minimum Legally Required Dividends Carve-Out (+) US$30mm or PF 2.5x Cov. Net Debt / Cov. EBITDA Asset Sales Transaction with Affiliates Limitation on Sale and Lease-Backs Limitation on Dividend Restrictions on Restricted Subs Consolidation, Merger, Conveyance, Sale or Lease Change of Control Put @ 101% Additional Provisions Penalty Interest for Failure to Comply with any Maintenance Covenant: +2.0% p.a. for as long as any Maintenance Covenant is breached Penalty Interest for Failure to Implement Bank Debt Refinancing: +2.0% p.a. if Bank Debt Refinancing not implemented by Feb. 15, 2018

Covenant Net Debt reconciliation 25 12 months June 30,2018 R$ (in million) H GT Consolidated Indebtedness plus debt contracts with Forluz plus carrying liability of any put option obligation 14,604 8,641 1,067 241 1,042 414 minus escrow account amounts deposited to satisfy any put option obligation (89) - minus consolidated cash and cash equivalents; plus consolidated marketable securities recorded as current assets (1,229) (647) Covenant Net Debt 15,395 8,649 Covenant EBITDA 4,467 2,391 Covenant Net Debt / Covenant Ebitda 3.45 3.62 Total Secured Debt 6,211 Total Secured Debt / Covenant EBITDA 1.39

Covenant Ebitda reconciliation 26 12 months June 30,2018 R$ (in million) H GT Net income for the period/year (i) 925 (36) Net financial expenses 1,118 1,170 Income tax and Social Contribution tax 577 266 Depreciation and amortization 850 145 EBTIDA 3,470 1,545 minus minority interest result 338 673 minus provision for the variation in value of the put option obligations 385 98 minus non-operating result (which includes any gains on asset sales and any asset write-off or impairments) (2) 41 minus non-cash credits and gains increasing net income, to the extent they are non-recurring (720) (243) plus expenses related to adherence to the Minas Gerais State Tax Credits Regularization Plan (Plano de Regularização de Créditos Tributários PRCT), incurred in the third quarter of 2017 562 30 minus non-cash revenues related to transmission and generation indemnification (407) (407) plus cash dividends received from minority investments (as measured in the statement of cash flows) 394 207 minus monetary updating of concession grant fees (324) (324) plus cash inflows related to power generation concession grant fee 245 245 plus cash inflows related to transmission revenue for cost of capital coverage 526 526 Covenant EBITDA 4,467 2,391 Source: http://cemig.infoinvest.com.br/ptb/16629/earnings%202t18%20final.pdf

Cemig H Cemig GT Cemig D Cemig H Cemig GT Covenant 27 Net debt/ebitda Eurobonds Covenant - (LTM Last twelve months) 5.00 5.00 4.25 4.25 3.50 5.50 5.50 3.53 3.62 5.00 5.00 4.50 3.58 3.45 2017 Jun-18 2018 Jun-19 2019 Limit Realized 2017 Jun-18 2018 Jun-19 2019 Limit Realized Reprofiling s Covenant - (LTM Last twelve months) 4.50 4.50 4.25 4.25 3.50 5.50 5.00 5.00 4.50 4.50 7.50 7.50 4.50 3.80 3.80 3.28 3.17 2017 Jun-18 2018 Jun-19 2019 Limit Realized 3.04 3.10 2017 Jun-18 2018 Jun-19 2019 Limit Realized 4.10 3.47 2017 Jun-18 2018 Jun-19 2019 Limit Realized

MILLIONS MILLIONS Debt profile lengthened: 28 Short term debt of R$ 3.4 billion re-profiled Amortization in 36 monthly tranches Cemig GT: R$ 741 million from January 2019 Cemig D: R$ 2.700 billion from July 2019 Successful Eurobond issue for US$1 billion (R$ 3.2 billion) Maturity 7 years, coupon 9.25% Secondary market yield trading at ~7.5% Improved credit perception, raising S&P s rating on the Company National brbbb- scale for brbbb, with a positive outlook Debt profile of Cemig GT (Dec/17) Debt profile of Cemig D (Dec/17) Dívida Prior debt, mantida maintained Dívida New Maturities do Reperfilamento/Bond Dívida Prior debt, mantida maintained Dívida New Maturities do Reperfilamento 3,000 2,500 2,000 1,500 1,000 500-3,245 247 247 1.607 247 690 863 848-326 - - - 2018 2019 2020 2021 2022 2023 2024 2025 1,600 1,400 1,200 1,000 800 600 400 200-729 1,425 365 182 594 501 495 498 - - - 209 223 242 220 2018 2019 2020 2021 2022 2023 2024 2025

Average MW Brazilian National Grid: projections for 2018 22 29 Made in May 2018 90,000 80,000 70,000 60,000 50,000 40,000 30,000 20,000 10,000-2017 2018 2019 2020 2021 2022 Surplus % 16.0% 12.1% 12.6% 10.5% 6.7% Surplus 10,857 8,624 9,326 8,086 5,358 Reserve 2,689 3,005 3,125 3,160 4,346 Thermal 15,006 15,578 18,654 19,979 19,998 Wind/bio/solar 6,619 6,780 7,001 7,295 7,634 Hydro 57,113 57,555 57,681 57,732 57,783 Market 67,880 71,290 74,010 76,921 80,057 Source: May 2018 monthly operational survey (PMO) (includes contracting of Angra III as Reserve Energy from Jan, 2022),

Jan-13 Feb-13 Mar-13 Apr-13 May-13 Jun-13 Jul-13 Aug-13 Sep-13 Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14 Nov-14 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15 Dec-15 Jan-16 Feb-16 Mar-16 Apr-16 May-16 Jun-16 Jul-16 Aug-16 Sep-16 Oct-16 Nov-16 Dec-16 Jan-17 Feb-17 Mar-17 Apr-17 May-17 Jun-17 Jul-17 Aug-17 Sep-17 Oct-17 Nov-17 Dec-17 Jan-18 Feb-18 Mar-18 Apr-18 May-18 Jun-18 Jul-18 Aug-18 Sep-18 Level of reservoirs (%) by region (%)* 30 100 90 80 70 60 50 40 30 20 10-48.36 40.16 28.7 22.96 Northeast North South Southeast/Midwest *Source: ONS

Jan-12 Feb-12 Mar-12 Apr-12 May-12 Jun-12 Jul-12 Aug-12 Sep-12 Oct-12 Nov-12 Dec-12 Jan-13 Feb-13 Mar-13 Apr-13 May-13 Jun-13 Jul-13 Aug-13 Sep-13 Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14 Nov-14 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15 Dec-15 Jan-16 Feb-16 Mar-16 Apr-16 May-16 Jun-16 Jul-16 Aug-16 Sep-16 Oct-16 Nov-16 Dec-16 Jan-17 Feb-17 Mar-17 Apr-17 May-17 Jun-17 Jul-17 Aug-17 Sep-17 Oct-17 Nov-17 Dec-17 Jan-18 Feb-18 Mar-18 Apr-18 May-18 Jun-18 Jul-18 Aug-18 Sep-18 Spot price 31 Brazil: electricity spot price - monthly average (R$/MWh) 900 800 700 600 655.52 500 472.75 400 300 260.53 280.35 303.81 309.35 200 100 163.94 115.57 0 SE/CO 2012 average 2013 average 2014 average 2015 average 2016 average 2017 average 2018 average

Power Generation Auctions 32 # Type Plant Installed capacity (MW) Assured energy (average MW) Auction 27 September (with 30 years of concession) Winner Price (bn) Premium 1 HPP São Simão 1,710 1,281 SPIC PACIFIC ENERGY PTY LTD. 7.180 6.51% 2 HPP Jaguara 424 336 ENGIE BRASIL 2.171 13.59% 3 HPP Miranda 408 202 ENGIE BRASIL 1.360 22.42% 4 HPP Volta Grande 380 229 ENEL BRASIL S.A. 1.419 9.84% TOTAL 2,922 2,048 12.130 9.73% In August, 2017 Mining and Energy Ministry Order 291/17 established the values of indemnity, payable to Cemig GT Total the indemnity is R$ 1.119 billion in June, 2018: Miranda R$ 835 mn São Simão R$ 284 mn

Cemig D Losses 33 Technical losses 4,500 4,476 4,458 4,451 4,485 4,572 4,542 20.00% 15.00% 4,000 8.99% 8.98% 9.00% 8.98% 9.00% 9.01% 10.00% 3,500 7.84% 7.84% 7.84% 7.84% 7.84% 8.77% 5.00% 3,000 Mar/17 mar/17 Jun/17 jun/17 Sep/17 set/17 Dec/17 dez/17 Mar/18 mar/18 Jun/18 jun/18 Perdas Technical Técnicas losses (GWh) Perdas Technical Técnicas/CargaFio Losses / Total Load (%) (%) Perdas Regulatory Técnicas Losses - Regulatórias (%) (%) 0.00% Total losses 6,668 6,889 6,773 7,113 7,106 6,937 13.40% 13.88% 13.69% 14.24% 13.99% 13.76% 10.81% 10.82% 10.84% 10.84% 10.92% 11.75% Mar/17 mar/17 Jun/17 jun/17 Sep/17 set/17 Dec/17 dez/17 Mar/18 mar/18 Jun/18 jun/18 Perdas Total losses Totais (GWh) Perdas Total Losses Totais // Total CargaFio Load (%) Meta Regulatory Regulatória Losses (Perdas (%) Totais)

Strong shareholders base assures liquidity 34 Average daily trading volume in Oct/2018 (preferred share) BOVESPA: R$100.2 million NYSE: US$10.4 million North America Canada USA EUROPE Austria Belgium Denmark France Finland Germany Guernsey Greece Holland Ireland Italy Malta Jersey Liechtenstein Luxembourg Norway Portugal Spain Sweden Switzerland UK Central America Bahamas Bermuda Cayman islands LATIBEX (2017) XCMIG 7.1 million NYSE (2017) CIG US$ 2.95 billion CIG.C US$ 2.3 million Middle East UAE Kuwait Oman Saudi Arabia ASIA Brunei Japan India Malaysia Singapore South Korea Taiwan China South America Argentina Brazil Chile Uruguay BOVESPA (2017) CMIG4 R$ 17.0 billion CMIG3 R$ 1.1 billion Africa South Africa OCEANIA Australia New Zeland Shares traded on 3 stock exchanges Over 140,000 stockholders in 38 countries

Ebitda companies 35 1,817 970 618 849 662 623 116 118-107 Cemig Cemig GT Cemig D Light Taesa Santo Antônio Aliança Gasmig Renova Companies Ebitda 1H18 % Cemig Proportional Guidance 2018 Cemig 1,817 1,817 3,795-4,228 Cemig GT 970 100% 970 1,549-1,807 Cemig D 618 100% 618 1,518-1,729 Light 849 48,86% 415 Taesa 662 21,68% 144 Aliança* 116 45% 52 Gasmig 118 99,57% 117 Santo Antônio 623 18% 113 Renova -107 36,23% -39 * Estimate

36 8.5 R$ bn Net RAB - Regulatory Asset Base Banco do Brasil Santander BV Financeira 1.09% 1.09% 1.08% 9.77% 13.03% 1,024 MW installed capacity RME LEPSA BNDESPAR MERCADO 26.06% 13.03% 13.03% 9.4% 38.5% 648 MWavg Assured Energy 2.8 Aug,27 th R$ bn of market capitalization RR AP Net revenue 4,845 5,621 Net profit/loss -26 67 661 Ebitda 849 1H17 1H18 1H17 1H18 1H17 1H18 AC AM RO PA MT MS PR RS GO SP SC TO DF MA MG PI BA RJ CE ES RN PB PE AL SE Power Generation Power Transmission Electricity Distribution Cemig Free Consumer Clients Wind Power Generation

Taesa 37 2.6 R$ bn RAP - Annual Permitted Revenues (2018/2019 ) ISA Brasil Mercado 21.68% 14.88% 63.45% 12,135 Km in transmission line 7.3 Aug,27 th R$ bn of market capitalization RR AP Net revenue 892 891 Net profit 273 476 Ebitda 487 666 AC AM RO MT PA GO TO DF MA MG PI BA CE RN PB PE AL SE 1H17 1H18 1H17 1H18 1H17 1H18 MS SP PR SC RJ ES Power Transmission RS

38 VALE VALE 8 Enterprises in operation 55% 45% 51% 49% 1,257 MW installed capacity Aliança Norte Energia 9% 695 MWavg Assured Energy RR AP Net revenue 930 804 Net profit 293 216 Ebitda 557 497 2016 2017 2016 2017 2016 2017 AC AM RO PA MT MS PR GO SP SC TO DF MA MG PI BA RJ CE ES RN PB PE AL SE Power Generation Wind Power Generation RS

39 3,568 MW installed capacity Furnas 39.0% Caixa FIP Amazônia Energia Odebrecht Energia SAAG Investimentos Cemig GT 20.0% 18.6% 12.4% 10.0% 2,424 MWavg Assured Energy Caixa FIP Amazônia Energia 100% 50 Generator units bulb turbine 20 R$ billion Capex RR AP Net revenue 1,508 1,519 Net loss Ebitda 623 623 AC AM RO PA MT MS PR GO SP TO DF MA MG PI BA RJ CE ES RN PB PE AL SE Power Generation -490-726 1H17 1H18 1H17 1H18 1H17 1H18 RS SC

40 1,094 In 2017 Km pipeline Município de Belo Horizonte 99.57% 0.43% 1.1 Billion m³/year 37,235 Consumers units 20 R$ million Capex RR AP Net revenue 663 731 Net profit 63 62 128 Ebitda 118 AC AM RO PA MT MS PR GO SP SC TO DF MA MG PI BA RJ CE ES RN PB PE AL SE Natural Gas Distribution 1H17 1H18 1H17 1H18 1H17 1H18 RS