(revised)Top North American Gas Marketers (Bcf/d)

Company

2Q2006

2Q2005

Change

ConocoPhillips

14.10

11.20

26%

Sempra

11.60

10.60

9%

Coral

11.20

11.20

0%

Chevron

7.30

5.70

28%

Constellation

7.36

4.72

56%

Cinergy

5.05

5.87

-14%

Louis Dreyfus

5.04

3.99

26%

Tenaska

3.80

4.10

-7%

EnCana

3.36

3.21

5%

UBS

5.07

4.27

19%

Oneok

2.79

3.02

-8%

ExxonMobil

2.51

2.75

-9%

Merrill Lynch

2.15

2.10

2%

Nexen

2.26

2.75

-18%

Williams

2.40

2.10

14%

Devon

2.18

2.27

-4%

Sequent

2.09

2.13

-2%

Chesapeake

1.43

1.11

29%

Anadarko

1.38

1.15

20%

Total

93.07

84.24

10%

Source: Quarterly financial reports with the Securities and Exchange Commission, or if necessary, statements signed by company officials and provided to NGI.

Companies providing data directly to NGI included Chevron, Cinergy, ConocoPhillips, Constellation, Coral, Louis Dreyfus, Merrill Lynch, Tenaska and UBS. BP plc, which resumed reporting to this survey for 4Q2007, is believed to be the largest North American Gas Marketer by a wide margin.