Energy consulting firm PFC has released its annual ranking of the world's most valuable energy companies.
With oil and gas prices relatively flat from a year ago nearly every company's value either fell or flatlined.
Just two of the top-10 companies saw positive growth, and neither were in the U.S.
The combined market capitalization of the PFC Energy top 50 was $3.5 trillion, a slight 0.8% decline from 12 months previously.
We ranked the 20 biggest.
20. Suncor
Ticker: SU
Previous rank: 20
Market cap: $50.4 bn
YOY share price growth: 12 percent
Country: Canada
Comment: Suncor possesses the largest oil sand reserves in the world.
Source: PFC Energy
19. BG Group
Ticker: BG.L (LSE)
Previous rank: 18
Market cap: $55 bn
YOY share price growth: -23 percent
Country: UK
Comment: BG has recently been forced to sell off assets to raise cash.
Source: PFC Energy
18. LUKOIL
Ticker: LKOH.RU
Previous rank: 21
Market cap: $56.3 bn
YOY share price growth: 29 percent
Country: Russia
Comment: LUKOIL just purchased Conoco's 30 percent stake in a major Russian gas field.
Source: PFC Energy
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