Financial and Operational Results September 30 th, 2016

Financial and Operational Results September 30 th, 2016

Disclaimer This presentation contains estimates and forward-looking statements regarding our strategy and opportunities for future growth. Such information is mainly based on our current expectations and estimates or projections of future events and trends, which affect or may affect our business and results of operations. Although we believe that these estimates and forward-looking statements are based upon reasonable assumptions, they are subject to several risks and uncertainties and are made in light of information currently available to us. Our estimates and forward-looking statements may be influenced by the following factors, among others: (1) general economic, political, demographic and business conditions in Brazil and particularly in the geographic markets we serve; (2) inflation, depreciation and devaluation of the real; (3) our ability to implement our capital expenditure plan, including our ability to arrange financing when required and on reasonable terms; (4) our ability to compete and conduct our businesses in the future; (5) changes in customer demand; (6) changes in our businesses; (7) government interventions resulting in changes in the economy, taxes, rates or regulatory environment; and (8) other factors that may affect our financial condition, liquidity and results of our operations. The words believe, may, will, estimate, continue, anticipate, intend, expect and similar words are intended to identify estimates and forward-looking statements. Estimates and forward-looking statements speak only as of the date they were made and we undertake no obligation to update or to review any estimate and/or forward-looking statement because of new information, future events or other factors. Estimates and forward-looking statements involve risks and uncertainties and are not guarantees of future performance. Our future results may differ materially from those expressed in these estimates and forward-looking statements. In light of the risks and uncertainties described above the estimates and forward-looking statements discussed in this presentation might not occur and our future results and our performance may differ materially from those expressed in these forward-looking statements due to, inclusive, but not limited to the factors mentioned above. Because of these uncertainties you should not make any investment decision based on these estimates and forward-looking statements.

Highlights During the quarter, 13 industries, 185 commercial establishments and 31k households were connected, bringing the number of new customers connected in the last 12 months to more than 115,000; Residential volume grew 18.8%, reflecting the addition of 114k new customers in the last 12 months, the lower average temperature and the end of the water crisis; CNG increased by 3.4% in volume, first quarterly growth in recent years, reflecting the increased competitiveness of gas and growth in the number of conversions in recent quarters; The macroeconomic scenario continues to affect industrial volume, which decreased by 3.7% from 3Q15; Normalized EBITDA was R$ 448 million, increasing 17.9% from 3Q15; 3

Operational Performance 3Q16 3Q15 3T16 / 3T15 Volume (thousand m³) YTD16 YTD15 YTD16 / YTD15 73,247 61,663 18.8% RESIDENTIAL 181,097 157,278 15.1% 35,729 33,686 6.1% COMMERCIAL 99,977 94,895 5.4% 838,428 870,439-3.7% INDUSTRIAL 2,448,277 2,649,147-7.6% 68,336 70,834-3.5% COGENERATION 199,252 218,372-8.8% 49,859 48,226 3.4% AUTOMOTIVE 143,503 146,205-1.8% 1,065,599 1,084,848-1.8% TOTAL 3,072,106 3,265,897-5.9% 11.6 11.8 MMm³/Day 11.2 12.0 12,492 222,179-94.4% THERMAL GENERATION 115,422 702,770-83.6% 1,078,091 1,307,027-17.5% TOTAL 3,187,528 3,968,667-19.7% 1,665,798 1,550,366 7.4% TOTAL CUSTOMERS 1,665,798 1,550,366 7.4% Volume Markets Margin 0.1% 6% 9% 78% 5% 7% 3% 31% 54% 1% 3% 2% 4

Financial Performance In millions of R$ EBITDA Net Income CAPEX 18% -7% -25% 387 380 28% 495 448 192 193 12% 216 180 137 102 3Q15 3Q16 3Q15 3Q16 3Q15 3Q16 4% -10% -20% 48% 1,657 67% 767 1,116 1,064 1,106 458 440 396 383 306 YTD15 IFRS YTD16 Normalized YTD15 IFRS YTD16 Normalized YTD15 CAPEX YTD16 5

Debt Structure In thousands of R$ September 2016 December 2015 Short Term Debt 568,556 549,768 Long Term Debt 2,511,429 2,608,266 Total Debt 3,079,985 3,158,035 (-) Cash 1,691,599 1,967,643 (=) Net Debt 1,388,386 1,190,392 EBITDA (*) 2,070,424 1,529,918 Net Debt/EBITDA 0.67 0.78 Short Term Debt/Total Debt 0.18 0.17 Net Debt / EBITDA - Normalized 1.30 0.78 Debt Amortization Schedule Debt Composition Others 12% EIB 19% 569 960 444 378 351 379 Debentures 37% BNDES 33% 12 months 13-24 25-36 37-48 49-60 2021 and forward * Last 12 months EBITDA 6

Regulatory Current Account In millions of R$ 334 364 351 348 297 223 209 243 293 211 211 117-78 -391-451 Mar Jun Sep Dec Mar Jun Sep Dec Mar Jun Sep Dec Mar Jun Sep 2013 2014 2015 2016 7

Guidance 2015 2016 Guidance 1st Revision 2016 Actual Min Max Min Max Total customers (thousand) 1,574 1,650 1,700 1,650 1,700 Volume ex-thermal (thousand m³) 4,287 4,000 4,300 4,000 4,300 EBITDA Normalized (R$mm) 1,378 1,350 1,450 1,350 1,450 EBITDA IFRS (R$mm) 1,530 1,400 1,600 1,900 2,000 CAPEX (R$mm) 521 470 520 470 520 8

INVESTOR RELATIONS investidores@comgas.com.br ri.comgas.com.br Phone: +55 11 4504-5065 comgas.com.br NELSON GOMES CEO RAFAEL BERGMAN CFO and IRO ANDRÉ SALGUEIRO Treasury and Investor Relations Manager Av. Pres. Juscelino Kubitschek, nº 1327, 15º andar - Vila Nova Conceição - CEP 04543-011 / São Paulo - SP - Brasil