Oil & Gas Companies

Company NameCompany LocationCompany TypeMost Recent Production
1U Bee Tea Production LLCCulbertson, MT 59218Oil & Gas OperatorApr 2025
2U R C COil & Gas OperatorJun 1991
3U S Department Of EnergyOil & Gas OperatorApr 1999
4U S Drilling Company IncHoldenville, OK 74848-0913Oil & Gas OperatorMar 2017
5U S Energy Corp. Of Amer. Inc.Ranger, TX 76470Oil & Gas OperatorJul 2025
6U S Exploraton Liq TrustOil & Gas OperatorOct 1994
7U S Liquids Of La., L.P.Oil OperatorApr 2014
8U V IndustriesOil & Gas OperatorJan 1993
9U-N-I ExploratioOil & Gas OperatorDec 1990
10U-N-I Exploration & Development, Inc.Yates Center, KS 66783Oil & Gas OperatorJan 2003
11U. D. Man, Inc.San Antonio, TX 78212Oil & Gas OperatorJul 2025
12U. O. C., Inc.Oil OperatorJun 2019
13U. S. Energy Development CorporationFort Worth, TX 76164Oil & Gas OperatorJul 2025
14U. S. Operating, Inc.Dallas, TX 75252Oil & Gas OperatorJul 2025
15U.S. Capital Corp Of Am, Inc.Oil & Gas OperatorAug 1998
16U.S. Enercorp, LLCSan Antonio, TX 78217Oil & Gas OperatorJul 2004
17U.S. Enercorp, LTD.San Antonio, TX 78209Oil & Gas OperatorSep 2019
18U.S. Exploration CompanyHouston, TX 77002Oil & Gas OperatorAug 2003
19U.S. Oil Reclaimers, LLCOil OperatorJun 2023
20U.S. Sovereign Oil And Gas, Inc.Dallas, TX 75355Oil & Gas OperatorJul 2025
21U.S. Steel Mining Co., Inc.Gas OperatorJan 2000
22U.S. Steel Mining Co., LLCGas OperatorOct 2002
23U.S.A. Plugging CompanyPearsall, TX 78061Oil & Gas OperatorJul 2025
24U1 Ranch OilHouston, TX 77269Oil & Gas OperatorJul 2025
25Uae Investco 1 (Estill), LLCRavenna, KY 40472Oil OperatorDec 2022
26Uae Investco 2 (Lee), LLCRavenna, KY 40472Oil OperatorDec 2021
27Ubetco, Inc.Rockdale, TX 76567Oil & Gas OperatorJul 2025
28Uebelhor, TheodoreOil OperatorDec 2023
29Uehlin LLCOberlin, KS 67749Oil OperatorDec 2024
30Uhc New Mexico CorporationMidland, TX 79702Oil & Gas OperatorFeb 2007
31Uhc Petroleum CorporationRocksprings, TX 78880Oil & Gas OperatorJul 2025
32Uhl Oil Co., Inc.Bradford, PA 16701Oil & Gas OperatorDec 2024
33Uhls, Jimmie J.Sedan, KS 67361Oil OperatorSep 2019
34Uinta Oil & GasRoosevelt, UT 84066Oil & Gas OperatorNov 1997
35Uinta Wax Operating, LLCFort Worth, TX 76107Oil & Gas OperatorApr 2025
36Uinta-Taylor Fund, LTDRoosevelt, UT 84066Oil & Gas OperatorNov 2018
37Uintah Investors LLCVernal, UT 84078Oil & Gas OperatorMay 2025
38Ulatex Oil & Gas Inc.Nocona, TX 76255Oil & Gas OperatorDec 1998
39Ullum Oil And Gas Development Corporation, Inc.Grantsville, WV 26147-0000Oil & Gas OperatorDec 2021
40Ulrich, William J., Jr. & Connie K.Elma, NY 14059Gas OperatorDec 2024
41Ultra Oil & Gas, Inc.Centerton, AR 72719Oil & Gas OperatorJul 2025
42Ultra Petroleum (U.S.A.), Inc.Granbury, TX 76048Oil & Gas OperatorSep 2003
43Ultra Production Company, LLCCedar Bluff, VA 24609Gas OperatorOct 2014
44Ultra Resources IncHouston, TX 77060Oil & Gas OperatorSep 2018
45Ultramar Oil & Gas LTDHouston, TX 77060Oil & Gas OperatorJul 1995
46Ultramar Production CompanyOil & Gas OperatorDec 1991
47Ulysses, City OfUlysses, KS 67880Gas OperatorMar 2025
48Umberham Oil Company IncOklahoma City, OK 73151-4000Oil & Gas OperatorMay 2025
49Umc Petroleum CorporationHouston, TX 77002Oil & Gas OperatorMar 2015
50Umma Resources, LLCPortland, TX 78374Gas OperatorJul 2025
51Ummel'S Tank SerOil OperatorSep 1994
52Unbridled Resources, LLCHouston, TX 77002Oil & Gas OperatorJul 2025
53Unc Texas IncorpGas OperatorMay 1987
54Underground Energy Inc.Oil & Gas OperatorApr 2025
55Underwood Oil & GasCasper, WY 82602Oil & Gas OperatorMay 2025
56Underwood Oil And Gas LLCChandler, OK 74834-1414Oil & Gas OperatorMay 2025
57Underwood, Donald D. Dba Mustang Oil CoSalem, WV 26426Oil & Gas OperatorDec 2020
58Underwood, JimGraham, TX 76450Oil & Gas OperatorMar 2018
59Underwood, Rip CAmarillo, TX 79101Gas OperatorSep 1963
60Unger Well Drilling CorpDennison, OH 44621Oil & Gas OperatorDec 1999
61Uni Production Company, Inc.Oil & Gas OperatorApr 1988
62Unicon Producing CompanyHouston, TX 75252Gas OperatorMar 1994
63Unicorn Drilling IncCody, WY 82414Oil OperatorDec 1998
64Unicorn Energy, Inc.Elgin, TX 78621Oil & Gas OperatorJul 2025
65Unicorn Oil & Gas Co IncDorset, OH 44032Oil & Gas OperatorDec 1993
66Unifid Oil & Gas Corp.Oil & Gas OperatorMar 1994
67Unified Oil & Gas Corp.Snyder, TX 79550Oil OperatorJul 2025
68UnioilDenver, CO 80203Oil & Gas OperatorJun 2012
69Union Camp CorpDover, OH 44622Oil & Gas OperatorDec 2002
70Union City Boro Muni Auth Erie CntyUnion City, PA 16438-1326Gas OperatorDec 2023
71Union Crude CompanyBaytown, TX 77521Oil & Gas OperatorApr 2018
72Union Crude Operating Co.Baytown, TX 77521Oil OperatorAug 2003
73Union Development Company IncOil & Gas OperatorDec 1992
74Union Diversified, Inc.Gas OperatorDec 2008
75Union Drilling &Management IncGas OperatorFeb 1991
76Union Exploration Partners, LTD.Oil & Gas OperatorAug 1990
77Union Gas Operating CompanyHouston, TX 77014Oil & Gas OperatorJul 2025
78Union Oil CoDanville, OH 43014Oil & Gas OperatorDec 2014
79Union Oil Co Of CaliforniaMidland, TX 79706Oil & Gas OperatorJan 2022
80Union Operating CorpLakewoord, CO 80215Oil OperatorDec 2023
81Union Pacific Austin Chalk Co.Fort Worth, TX 76101Oil & Gas OperatorJan 2001
82Union Pacific ReOil & Gas OperatorDec 1996
83Union Pacific ResourOil & Gas OperatorApr 2002
84Union Pacific Resources Co.Fort Worth, TX 76101Oil & Gas OperatorSep 2002
85Union Petro IncUniontown, KY 42461Oil OperatorDec 2023
86Union PetrochemicalOil & Gas OperatorDec 1982
87Union Producing Co.Gas OperatorDec 1992
88Union Royalty, Inc.Midland, TX 79706Oil & Gas OperatorJul 2014
89Union Seaboard CorporationHouston, TX 77024Oil & Gas OperatorMar 2008
90Union Springs Central School DistrictUnion Springs, NY 13160Gas OperatorDec 2024
91Union Texas PetroleumHouston, TX 77252Oil & Gas OperatorOct 1991
92Union Texas Petroleum Corp.Houston, TX 77252-2120Oil & Gas OperatorDec 2014
93Union Valley Petroleum CorporationEnid, OK 73701Oil & Gas OperatorMay 2025
94Unionville ExploOil OperatorJul 1984
95Unit Drilling & Exploration CoTulsa, OK 74132-5300Oil & Gas OperatorApr 2025
96Unit Manager, Citronelle UnitOil & Gas OperatorSep 2001
97Unit Petroleum CompanyTulsa, OK 74170Oil & Gas OperatorJul 2025
98United CompanyLubbock, TX 79408Oil & Gas OperatorJun 1995
99United Energy & Expl IncAda, OK 74821-2449Oil & Gas OperatorApr 2025
100United Energy & Exploration LLCAda, OK 74821Oil & Gas OperatorApr 2025