Oil & Gas Companies

Company NameCompany LocationCompany TypeMost Recent Production
1O & G Energy, Inc.Oil & Gas OperatorOct 1996
2O & O Operators, LLC.Midland, TX 79708Oil & Gas OperatorFeb 2019
3O H BerryMidland, TX 79702Oil & Gas OperatorFeb 2003
4O Hill Enterprises, Inc.Oil & Gas OperatorJan 2014
5O I L Energy CorpOil & Gas OperatorMar 2018
6O I L Niagaran LLCOil & Gas OperatorDec 2017
7O K Swabbing IncHennessey, OK 73742-0835Oil & Gas OperatorDec 2018
8O S & J OperatinOil OperatorNov 1984
9O S & S Oil CompanyElectra, TX 76360Oil & Gas OperatorJan 2018
10O&G Investments Inc.Runge, TX 78151Oil & Gas OperatorFeb 2003
11O'Bar Operating Co., Inc.Longview, TX 75604-7129Oil & Gas OperatorFeb 2019
12O'Benco, Inc.Shreveport, LA 71136-6149Oil & Gas OperatorFeb 2019
13O'Blue Corp.Midland, TX 79710Oil & Gas OperatorNov 1994
14O'Boyle Energy CorporationOil OperatorFeb 1991
15O'Brien Energy CompanyShreveport, LA 71106Oil & Gas OperatorNov 2018
16O'Brien Energy Resources CorpPortsmouth, NH 03801Oil & Gas OperatorJan 2019
17O'Brien Oil CorporationGuthrie, OK 73044-3154Oil & Gas OperatorDec 2018
18O'Brien Operating CompanyOil & Gas OperatorAug 2010
19O'Brien Resources, LLCShreveport, LA 71136Oil OperatorJan 2019
20O'Brien, Mae Or Brett StricklandBelington, WV 26250-0076Oil & Gas OperatorDec 2017
21O'Brien-SillBakersfield, CA 93301Oil & Gas OperatorDec 2017
22O'Connell, James P.Vacaville, CA 95687Oil OperatorNov 2018
23O'Connor & Hewitt, LTD.Gas OperatorJun 1998
24O'Connor Energy Management, LLCVictoria, TX 77902Oil OperatorFeb 2019
25O'Dell Donald EBroken Arrow, OK 74012-4576Gas OperatorMay 2005
26O'Dell, MitchellCross Plains, TX 76443Oil & Gas OperatorFeb 2019
27O'Donnell Bill CTulsa, OK 74135-4241Oil OperatorNov 2015
28O'Donnell Oil, LLCWilmington, CA 90744Oil & Gas OperatorDec 2017
29O'Donohoe, JackOil & Gas OperatorMay 2002
30O'Hare Energy CoOil OperatorDec 1983
31O'Leary'S Oil & Gas Inc.Oil & Gas OperatorMay 2008
32O'Malley Production Co Inc.Natchez, MS 39120Oil & Gas OperatorMar 1988
33O'Meara LLCOil & Gas OperatorAug 2018
34O'Meara, Inc.Oil & Gas OperatorDec 2006
35O'Neal Cattle Co.Pampa, TX 79066Gas OperatorFeb 2019
36O'Neal Oil & Gas CoFort Worth, TX 76107-1479Oil & Gas OperatorJan 2019
37O'Neal Oil CompanyNocona, TX 76255Oil OperatorFeb 2019
38O'Neal Operating CompanyOil & Gas OperatorDec 1999
39O'Neal VernaNocona, TX 76255-0538Gas OperatorDec 2018
40O'Neal, LindellOil & Gas OperatorAug 1997
41O'Neil Properties LTDMidland, TX 79702Oil & Gas OperatorJun 2015
42O'Neil, PatOil & Gas OperatorNov 2005
43O'Neil, Pat Estate OfWichita Falls, TX 76308-893Oil OperatorFeb 2019
44O'Neill Properties, LTD.Midland, TX 79702Oil & Gas OperatorFeb 2019
45O'Ryan Oil And GasOdessa, TX 79768Oil & Gas OperatorFeb 2019
46O'Sand Production, Inc.Oil & Gas OperatorAug 2003
47O'Sullivan & Scully, Inc.Oil & Gas OperatorOct 1994
48O'Sullivan Oil & Gas Co., Inc.Oil & Gas OperatorOct 2000
49O'Tool Oil & Gas, LLCDallas, TX 75219Oil & Gas OperatorFeb 2019
50O-K Gas SVCSGas OperatorNov 2018
51O. B. And Keith WhatleyOil OperatorJun 1993
52O. B. BeckOil OperatorFeb 1991
53O. B. MobleyOil & Gas OperatorJul 2010
54O. B. Mobley, Et AlOil OperatorJul 1989
55O. B. WhatleyOil OperatorJun 1993
56O. D. MaybrierOil OperatorDec 2011
57O. F. H., Inc.Oil OperatorMay 1990
58O. G., Inc.Oil & Gas OperatorOct 1991
59O. H. B. Inc.San Angelo, TX 76902-1432Oil & Gas OperatorFeb 2019
60O. H. M. OperatingPampa, TX 79065Oil & Gas OperatorFeb 2019
61O. O. CummingsGas OperatorJan 1999
62O.B., Keith & Owen B. WhatleyOil OperatorMar 1989
63O.G.O. RefiningOil & Gas OperatorJun 2013
64O.G.P. Operating, Inc.Dallas, TX 75231Oil & Gas OperatorFeb 2019
65Oahe Oil CompanyTexline, TX 79087Oil & Gas OperatorMay 2004
66Oak Dale Drilling CoLogan, OH 43138-1851Oil & Gas OperatorDec 2015
67Oak Energy, LLCHouston, TX 77008Oil & Gas OperatorFeb 2019
68Oak Grove Resources, LLCCleveland, OH 44114Gas OperatorDec 2018
69Oak Hill Petroleum CorporationOklahoma City, OK 73116-5627Oil OperatorDec 2017
70Oak Hills Drilling & Oper., LLCHoldenville, OK 74848Oil & Gas OperatorMar 2015
71Oak Hills Energy IncHoldenville, OK 74848-0470Oil & Gas OperatorMar 2015
72Oak Resources, Inc.Tulsa, OK 74153-0505Oil & Gas OperatorMar 2015
73Oak Ridge Development CompanyAlliance, OH 44601Oil OperatorDec 2018
74Oak Ridge LLCWellsville, KS 66092Oil OperatorNov 2018
75Oak Valley Operating, LLCThe Woodlands, TX 77380Oil & Gas OperatorJun 2015
76Oakes Gas Co IncKane, PA 16735-3905Gas OperatorDec 2015
77Oakland CorporationShreveport, LA 71135Oil & Gas OperatorDec 1981
78Oakland Petroleum Oper Co., Inc.Kilgore, TX 75663Oil & Gas OperatorFeb 2019
79Oakley Oil & Gas, L.L.C.Oil & Gas OperatorMar 2012
80Oakmont CCOakmont, PA 15139-1135Gas OperatorDec 2018
81Oakmont Oil And GasGraham, TX 76450Oil OperatorFeb 2019
82Oakridge Energy, Inc.Wichita Falls, TX 76302Oil & Gas OperatorFeb 2019
83Oakridge Oil And Gas, LPJacksboro, TX 76458Oil & Gas OperatorFeb 2019
84Oaks Petroleum IOil OperatorJul 1987
85Oaktree Oil CompanyAlbany, TX 76430Oil & Gas OperatorFeb 2019
86Oakwood Energy, Inc.Jourdanton, TX 78026Oil & Gas OperatorFeb 2019
87Oakwood Resources, Inc.Dallas, TX 75374Oil OperatorMay 1998
88Oasis Energy Resources LLCGas OperatorNov 2018
89Oasis Operating, Inc.Lubbock, TX 79404Oil & Gas OperatorFeb 2019
90Oasis Petroleum North America LLCHouston, TX 77002Oil & Gas OperatorJan 2019
91Oasis Petroleum Permian LLCHouston, TX 77002Oil & Gas OperatorFeb 2019
92Oasis Production Co., Inc.Oil & Gas OperatorMay 1988
93Oast, Thomas H.Greenville, NC 27835Oil OperatorNov 1985
94Oates, John Co., Inc.Stinnett, TX 79083Oil & Gas OperatorFeb 2019
95Obax Oil And Gas LLCSaint Louis, MO 63131Oil OperatorFeb 2019
96Obele Operating Company LLCSedona, AZ 86336-5745Oil & Gas OperatorJan 2019
97Obermiller Clarence TrustCreston, OH 44217Oil & Gas OperatorDec 1987
98Obermiller Paul JCreston, OH 44217Oil & Gas OperatorDec 2014
99Oblaen Resources LLCWallis, TX 77485Oil & Gas OperatorFeb 2019
100Occ Operating Co.Oil & Gas OperatorSep 2018