Oil & Gas Companies in California

Company NameCompany LocationCompany TypeMost Recent Production
1A. J. HayesOil & Gas OperatorDec 1998
2A. L. & V. I. GraysonOil OperatorDec 1993
3A. S. Johnston Drilling Corp.Oil & Gas OperatorDec 1987
4A.L.S. Resources Inc.Oil OperatorDec 2004
5Aa Production Services Inc.Gas OperatorMar 2025
6Aalpha Energy Inc.Oil & Gas OperatorApr 2025
7Aba Energy CorporationOil & Gas OperatorApr 2025
8ABC Oil Co.Wichita Falls, TX 76301Oil & Gas OperatorOct 2023
9Abe GiesbrechtGas OperatorDec 1983
10Adco LTD.Oil & Gas OperatorDec 1983
11Aera Energy LLCOil & Gas OperatorApr 2025
12Agey Petroleum Co.Oil & Gas OperatorDec 1998
13Alanmar EnergyGas OperatorJan 2018
14Alexander Oil Co.Loco, OK 73442-9409Oil & Gas OperatorMar 2025
15Allenco Energy Inc.Oil & Gas OperatorMar 2025
16Allied Energy CorporationOil & Gas OperatorMar 2025
17Allied Western PetroleumOil & Gas OperatorMar 2025
18Almond Crest Oil LLCOil & Gas OperatorApr 2025
19Amerada Hess Corp. Unit OperatorOil & Gas OperatorDec 1986
20Amerada Hess CorporationHouston, TX 77252Oil & Gas OperatorAug 2013
21American Barter Petroleum Inc.Oil & Gas OperatorJun 1993
22Ample Resources Inc.Oil & Gas OperatorMar 2025
23Amrich Energy Inc.Oil & Gas OperatorMar 2025
24Anacapa Oil CorporationGas OperatorMar 2025
25Anadime Energy Services Inc.Oil & Gas OperatorDec 2009
26Ancora-Verde CorporationOil & Gas OperatorDec 2004
27Andrew L. NewkirkOil OperatorMar 2025
28Angus Petroleum CorporationChicago, IL 60660Oil & Gas OperatorDec 2022
29Ann BrindleOil OperatorApr 2025
30Ann Marie TiersOil OperatorDec 1996
31Anschutz Exploration CorporationDenver, CO 80202Oil & Gas OperatorJun 2025
32Anterra Energy Services Inc.Oil & Gas OperatorMar 2025
33Anterra Services Inc.Oil & Gas OperatorMar 2025
34Apache CorporationHouston, TX 77042Oil & Gas OperatorJun 2025
35Apc Operating PartnershipTulsa, OK 74136Oil & Gas OperatorOct 1996
36Arcady Oil CompanyGas OperatorDec 1989
37Archer Operations California LLCGas OperatorMar 2025
38Arco Oil & Gas CompanyPlano, TX 75086Oil & Gas OperatorMar 2006
39Arco Western Energy Co.Oil & Gas OperatorDec 1999
40Argo Petroleum CorporationOil & Gas OperatorDec 1989
41Argosy Oil CompanyGas OperatorDec 1999
42Aristata Exploration Co.Gas OperatorDec 2009
43Arkoma Production Company Of CaliforniaOil & Gas OperatorDec 1993
44Armca Oil & Gas LLCOil OperatorApr 2025
45Armstrong Oil Inc.Oil & Gas OperatorDec 2020
46Armstrong Petroleum CorporationOil & Gas OperatorMar 2025
47Arrowhead Operating Inc.Argyle, TX 76226Oil & Gas OperatorJun 2025
48Arthur J. Arding Jr.Gas OperatorDec 1995
49Arthur McAdamsOil & Gas OperatorMar 2025
50Ashe Road Properties L.P.Oil & Gas OperatorDec 2009
51Asioco Inc.Oil & Gas OperatorJan 2018
52Aspen Exploration CorporationOil & Gas OperatorDec 2007
53Asphalta LLCOil & Gas OperatorApr 2025
54Astarta Springs Sustainable Farms LLCOil & Gas OperatorMar 2025
55Atasca Resources IncHouston, TX 77219Oil & Gas OperatorJun 2025
56Atlantic Oil CompanyOil & Gas OperatorMar 2025
57Atlantic Richfield CompanyPlano, TX 75074Oil & Gas OperatorDec 2016
58Austin Oil CompanyOil & Gas OperatorDec 2000
59Axis Petroleum Co.Oil & Gas OperatorDec 2022