1. 1
March 31st, 2013
COMPANHIA DE GÁS DE SÃO PAULO
Financial and Operational Results

2. Disclaimer
The statements contained in this report regarding the outlook on business,
estimations on financial and operational results and growth prospects for COMGÁS
are merely estimations and, as such, are based exclusively on management
expectations regarding future events and tendencies, that affect or may affect the
business. These estimations are subject to many risks and uncertainties and are
made considering the information currently available, and depend, substancially on
market conditions, the Brazilian economys performance, the business sector and
international markets, and are therefore subject to change without pior notice.
Because of these uncertainties, the investor should not make any investment
decisions based on these estimations and declarations on future operations.

3. Financial and Operational Results

4. 4
Highlights
1Q13
 Total volume of 1,367mm³ during 1Q13, 15% above that of 1Q12;
 Growth of 44% in investments compared to 1Q12, summing R$ 175mm in 1Q13;
 EBITDA of R$ 314mm, variation of +43% compared to 1Q12, due to the regulatory current account;
 Network extension of 300 km during the quarter, 15% above that of the same period in 2012;
 Third issuance of the Company’s promissory notes in the value of R$ 400mm.

5. 1Q12 1Q13
68%
6%
4%
3%
2%
17%
66%
5%
0%
20%
7%
2%
+15%
5
Volume
in million of m3
1,187
1,367
413.7 mi R$
1.4 bi m³
Margin
Volume
72,0%
6,8%
5,2%
3,8%
2,1%
10,0%
Industrial Cogeneration NGV Residential Commercial Thermal Generation

6. Meters
6
Total per Segment
*UDA’s (Unidade Domiciliar Autônoma)
897,974 887,162 840,915 1.2% 6.8%
1,229,713 1,202,805 1,116,668 2.2% 10.1%
11,435 11,268 10,595 1.5% 7.9%
1,011 1,008 1,010 0.3% 0.1%
2 2 2 0.0% 0.0%
25 25 23 0.0% 8.7%
318 324 347 -1.9% -8.4%
910,765 899,789 852,892 1.22% 6.79%
1,242,504 1,215,432 1,128,645 2.2% 10.1%
1Q13 4Q12 1Q12 1Q13 x 1Q12
RESIDENTIAL
NUMBER OF UDA's*
COMMERCIAL
INDUSTRIAL
1Q13 x 4Q12
THERMAL GENERATION
COGENERATION
AUTOMOTIVE
TOTAL METERS
TOTAL CUSTOMERS

7. 7
Volume per Segment
in thousands of m3
41,815 50,469 40,882 -17.1% 2.3%
25,793 28,274 26,196 -8.8% -1.5%
928,145 937,275 934,538 -1.0% -0.7%
82,659 89,344 86,034 -7.5% -3.9%
59,961 66,759 67,679 -10.2% -11.4%
1,138,373 1,172,121 1,155,329 -2.88% -1.47%
12.6 12.7 12.7
1,367,015 1,428,911 1,187,547 -4.33% 15.11%TOTAL
228,642 256,790 32,218 THERMAL GENERATION -11.0% 609.7%
COMMERCIAL
INDUSTRIAL
COGENERATION
AUTOMOTIVE
TOTAL
MMm³/day*
1Q13 x 1Q121Q13 x 4Q12
RESIDENTIAL
1Q13 4Q12 1Q12

8. 75
129 122
1Q12 4Q12 1Q13
220
258
314
1Q12 4Q12 1Q13
269 270 262
1Q12 4Q12 1Q13
110
143
92
1Q12 4Q12 1Q13
22%
43%
-5%
63%
-3%
-3%
-36%
-16%
EBITDA
in million of R$
Normalized IFRS
Net Income
Financial Performance
8

9. 9
Current Account
in million of R$
29 12
-55
-157
-230
-198
-128
-5
150
204
360 362
381
334
dec.09 mar.10 jun.10 sep.10 dec.10 mar.11 jun.11 sep.11 dec.11 mar-12 jun.12 sep.12 dec.12 mar.13
(1Q12) = +54
(1Q13) = -47

10. Investimentos
10
Investments
in million of R$
121
175
mar/12 mar/13
+44%
262
300
mar/12 mar/13
Network Extension (in thousands of km)
São João da Boa Vista
Hortolândia
Monte Mor
Capivari
Taubaté
Piracicaba
Osasco II
Rio Claro
Main Projects
+15%

11. 751
244 162 186 101 188
297
55
94 99 276 147
2013 2014 2015 2016 2017 2018
forward
Local Currency ForeignCurrency
Estrutura de Endividamento
299
256 285
377 335
1,048
Debt Structure
in thousands of R$
Debt Amortization Schedule (R$ mm) Debt Composition – Mar/13
*EBITDA considering the last 12 months
Short
Term
40%
Long
Term
60%
EIB
20%
BNDES
41%
Others
38%
Debt Mar 13 Mar 12
Short Term Debt 1,048,314 708,298
Long Term Debt 1,551,233 1,437,644
Total Debt 2,599,547 2,145,942
(-) Cash 327,504 104,341
(=) Net Debt 2,272,044 2,041,601
EBITDA 1,057,385 744,082
Net Debt / EBITDA 2.15 2.74
Short Term Debt / Total Debt 0.40 0.33

12. INVESTOR RELATIONS
investidores@comgas.com.br
www.comgas.com.br/en/investors
ROBERTO LAGE
CFO and
IRO
ANDRÉ SALGUEIRO
Investor Relations
Manager
Rua Olimpíadas, nº 205, 9º floor - Vila Olímpia - CEP 04551-000 / São Paulo - SP - Brazil
12