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

Company

1Q2006

1Q2005

Change

ConocoPhillips

13.00

11.30

15%

Sempra

12.60

12.20

3%

Coral

11.60

10.80

7%

Chevron

7.50

4.99

50%

Constellation

6.03

NA

NA

Cinergy

5.00

5.86

-15%

Louis Dreyfus

5.00

3.61

39%

Tenaska

4.10

4.10

0%

EnCana

3.34

3.15

6%

UBS

3.04

3.07

-1%

Oneok

2.72

3.49

-22%

ExxonMobil

2.59

2.80

-8%

Merrill Lynch

2.34

2.42

-3%

Nexen

2.26

2.70

-16%

Williams

2.20

2.50

-12%

Devon

2.10

2.34

-10%

Sequent

1.56

1.55

1%

Chesapeake

1.24

0.94

32%

El Paso

1.15

1.49

-23%

Total*

89.37

n/a

n/a

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

*Total excludes Constellation because no number was provided for 1Q2005. Companies providing data directly to NGI included ConocoPhillips, Coral, Cinergy, Tenaska, Louis Dreyfus, UBS, Merrill Lynch and Constellation. BP plc, which resumed reporting to this survey for 4Q2007, is believed to be the largest North American Gas Marketer by a wide margin.