There are hundreds of oil companies in the US. This is only a fraction of the oil companies worldwide.
A
ARCO
Aera Energy LLC
Alyeska Pipeline Service Company
Amoco
Amsoil
Anadarko Petroleum Corporation
Apache Corp.
Arbusto Energy
Ashland Inc.
B
BJ Services Company
Baker Atlas
Baker Hughes
Baker Oil Tools (BOT)
Betelgeuse incident
Bill Barrett Corporation
Buckeye Pipe Line
Burlington Resources
C
Cabot Oil
Calibre Energy
Caltex
Cenex (brand)
Chemoil
Chevron Corporation
Circle K
Citgo
Coffeyville Resources LLC
Colonial Pipeline
Conoco Inc.
D
Devon Energy
E
EOG Resources
Energen
Energen Resources Corporation
Enterprise Products
Equitable Resources
E cont.
Ergon (US)
Esso
ExxonMobil
F
Frontier Oil
G
Gate Petroleum
Getty Oil
Giant Industries
Global Partners LP
GlobalSantaFe Corporation
Gulf Oil
H
Harken Energy
Havemeyer Oil Company
Hess Corporation
Hornbeck Offshore Services
Hunt Petroleum
Hunt Refining Company
K
Kaiser-Francis Oil
Kerr-McGee
Kinder Morgan Energy Partners
Koch Industries
L
Lion Oil
M
Marathon Oil
Marathon Petroleum Company
Marland Oil Company
Merit Energy Company
Mobil
Motiva Enterprises
Murphy Oil
N
NOCO Energy Corporation
O
Occidental Petroleum
OpenSpirit Corporation
P
Panda Energy International
Paramount Petroleum
Parker Drilling Company
Pennzoil
P cont.
Petrohawk
Petroleum Geo-Services
Pilot Corp.
Pilot Travel Centers
Plains All American Pipeline
Prisma Energy International
R
Rentech
Rockefeller family
S
STP (motor oil company)
Saga Petroleum LLC
Samson Investment Company
SemGroup
Seven Sisters (oil companies)
Shamrock Oil
Shell Oil Company
Sinclair Oil
Speedway SuperAmerica
Standard Oil of Louisiana
Starvin’ Marvin’s
Sunoco
Superior Energy Services
Syntroleum
T
Taylor Energy
Terrible Herbst
Tesoro
Texaco
Trans-Arabian Pipeline Company
TransMontaigne
U
United Refining Company
Unocal Corporation
V
VECO Corporation
Vacuum Oil Company
Valero Energy Corporation
W
Williams Companies
X
XTO Energy
How many of these companies are operating in the state of California?