Top North American Gas Marketers (Bcf/d)

Company

1Q2008

1Q2007

Change

BP plc

27.10

n/a

n/a

Shell Energy NA

15.40

12.50

23%

ConocoPhillips

13.50

13.20

2%

Constellation

12.62

8.20

54%

Chevron

8.51

8.64

-2%

Louis Dreyfus

8.43

5.01

68%

RBS Sempra

7.10

9.10

-22%

Nexen

6.60

5.40

22%

Lehman Brothers

6.45

n/a

n/a

Tenaska

6.40

5.30

21%

Oneok

3.74

3.74

0%

Encana

3.73

3.40

10%

UBS

3.15

3.60

-13%

Sequent

2.70

2.40

13%

Hess

2.50

2.50

0%

Merrill Lynch

2.50

2.20

14%

Devon

2.45

2.24

9%

Anadarko

2.14

2.02

6%

Chesapeake

2.06

1.56

32%

ExxonMobil

1.99

2.36

-16%

Enserco

1.79

1.90

-6%

XTO

1.71

1.30

32%

Canadian Natural

1.54

1.72

-10%

Centerpoint

1.48

1.72

-14%

Apache

1.10

1.12

-2%

El Paso

1.08

1.10

-2%

Total*

147.77

102.23

45%

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 include BP plc, Chevron Corp., ConocoPhillips, Constellation Energy Commodities Group, Lehman Brothers, Louis Dreyfus Energy Services, Merrill Lynch Commodities, Shell Energy North America, Tenaska Marketing Ventures and UBS Energy. BP and Lehman did not participate in the 1Q2007 survey.