101 | Cities Serv Oil & Gas Corp | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 1964 |
102 | Clayton Investment | Farmington, NM 87401 | Oil & Gas Operator | Jun 1995 |
103 | Cline Oil And Gas Company | Santa Fe, NM 87501 | Oil & Gas Operator | Sep 1994 |
104 | Clinton Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Apr 1980 |
105 | CNG Producing | New Orleans, LA 70112-6000 | Oil & Gas Operator | Jun 2000 |
106 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
107 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2024 |
108 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
109 | Cochrane Resources Inc | Roosevelt, UT 84066 | Oil & Gas Operator | Feb 2024 |
110 | Cockrell Oil Corporation | Houston, TX 77002-7348 | Oil & Gas Operator | Feb 2001 |
111 | Colorado Drilling Company | Grand Junction, CO 81501 | Oil Operator | Jan 1990 |
112 | Colorado Pica Petro Corp | Cortez, CO 81321 | Oil & Gas Operator | Apr 2007 |
113 | Colt Resources Corporation | Billings, MT 59103 | Oil & Gas Operator | Feb 2013 |
114 | Coltharp, Edward H | | Oil & Gas Operator | Dec 1970 |
115 | Columbia Gas Development | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
116 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
117 | Comanche Oil & Gas Corp | Salt Lake City, UT 84107-3075 | Oil & Gas Operator | May 2005 |
118 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
119 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
120 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
121 | Continental Oil Co. | Durango, CO 81301 | Oil & Gas Operator | Dec 1983 |
122 | Coors Energy | Golden, CO 80402-0467 | Oil & Gas Operator | Sep 1992 |
123 | Cordillera Corporation | Denver, CO 80237 | Oil & Gas Operator | Feb 1996 |
124 | Coseka Resources USA LTD | Denver, CO 80202-1602 | Oil & Gas Operator | Jun 1988 |
125 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
126 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
127 | Cotton Petroleum Corp/Apc | Denver, CO 80203-4549 | Oil & Gas Operator | Nov 1990 |
128 | Crain & Griffith DRL Co | | Oil Operator | Jun 1963 |
129 | Credo Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | Jan 2013 |
130 | Crescent Point Energy Us Corp | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
131 | Cross Creek Corporation | Duncan, OK 73534 | Oil & Gas Operator | Mar 1999 |
132 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
133 | Crystal Carbon Company | | Gas Operator | Dec 1930 |
134 | CSX Oil & Gas Corporation | Houston, TX 77210-4326 | Oil & Gas Operator | Mar 1993 |
135 | D & D Oil Company | Dayton, TX 77535 | Oil & Gas Operator | Apr 2024 |
136 | D & J Oil Co | Kermit, TX 79745 | Oil & Gas Operator | Apr 2024 |
137 | D J Simmons, Inc | Farmington, NM 87499 | Oil & Gas Operator | Apr 2020 |
138 | Dalen Resources Oil & Gas | Dallas, TX 75206-3922 | Oil & Gas Operator | Jan 1996 |
139 | Daniels Petroleum Co | Denver, CO 80202 | Oil & Gas Operator | Mar 2003 |
140 | Davis Oil Company | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 2018 |
141 | De Kalb Agric Assn Inc | Vernal, UT | Oil & Gas Operator | Jun 1965 |
142 | Del-Rio Resources Inc | Vernal, UT 84079 | Oil & Gas Operator | Jan 2018 |
143 | Delhi-Taylor Oil Corp | | Oil & Gas Operator | Dec 1974 |
144 | Delhi-Trading LLC | Durango, CO 81301 | Oil & Gas Operator | Dec 2023 |
145 | Delta Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
146 | Devon Energy Operating Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2013 |
147 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
148 | Diamond Shamrock Corp | Amarillo, TX 79105 | Oil & Gas Operator | Jan 1987 |
149 | Diamond Shamrock Expl | Dallas, TX 75201 | Oil & Gas Operator | May 1987 |
150 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2024 |
151 | Diversified Energy LLC | Parker, CO 80138 | Oil & Gas Operator | Jan 2024 |
152 | DKM Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2011 |
153 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
154 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |
155 | Dougherty, H W | Petaluma, CA 94954 | Gas Operator | Oct 2019 |
156 | Dugan Production Corp | Farmington, NM 87499 | Oil & Gas Operator | Feb 2024 |
157 | Duncan Energy Companyuncan Energy Company | Denver, CO 80210 | Oil & Gas Operator | Jun 1995 |
158 | Duncan Oil Inc | Denver, CO 80210 | Oil & Gas Operator | Jun 2016 |
159 | Duncan, Raymond T | Denver, CO 80210 | Oil & Gas Operator | Feb 1996 |
160 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
161 | Edward Mike Davis | Las Vegas, NV 89107 | Oil & Gas Operator | Feb 2003 |
162 | Edwards Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
163 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
164 | El Paso Natural Gas Company | El Paso, TX 79978 | Oil & Gas Operator | Apr 2013 |
165 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Apr 2024 |
166 | Elk Operating Services, LLC | Denver, CO 80203 | Oil & Gas Operator | Feb 2024 |
167 | Elk Production LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2011 |
168 | Elk Production Uintah LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
169 | Elk Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2011 |
170 | Elliott Inc | Roswell, NM 88201 | Oil & Gas Operator | Apr 1962 |
171 | Elm Ridge Exploration Company | Dallas, TX 75243-9362 | Oil & Gas Operator | Jan 2019 |
172 | Elm Ridge Resources Inc | Dallas, TX 75243 | Oil & Gas Operator | Nov 2005 |
173 | Emery Resource Holdings LLC | Scottsdale, AZ 85260 | Gas Operator | Mar 2024 |
174 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
175 | Enduring Resources, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Jan 2024 |
176 | Energetics Inc | Englewood, CO 80155 | Oil & Gas Operator | Aug 1985 |
177 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
178 | Enerplus Resources USA Corporation | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
179 | Enerquest Operating, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2024 |
180 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
181 | Enogex Exploration Corp | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jun 2000 |
182 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
183 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
184 | Enstar Corporation | Houston, TX 77252 | Oil & Gas Operator | Apr 1988 |
185 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
186 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | May 2022 |
187 | EP Operating Company LP | Midland, TX 79705-5510 | Oil & Gas Operator | Mar 1993 |
188 | Eps Resources Corp | Englewood, CO 80111 | Oil & Gas Operator | Dec 2009 |
189 | Equitable Resources Energy | Houston, TX 77056-2742 | Oil & Gas Operator | Sep 1997 |
190 | Equity Oil Company | Salt Lake City, UT 84110-095 | Oil & Gas Operator | Aug 2004 |
191 | Erg Operating Company Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 2006 |
192 | Evergreen Energy, Inc | Houston, TX 77098 | Oil & Gas Operator | Apr 2024 |
193 | Evergreen Operating Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
194 | Evertson Oil Company Inc | Kimball, NE 69145 | Oil & Gas Operator | Sep 2001 |
195 | Exit Inc | | Oil Operator | Dec 1983 |
196 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Nov 2023 |
197 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2024 |
198 | F & M Oil Company Inc | Pettus, TX 78146 | Oil & Gas Operator | Apr 2024 |
199 | Falcon Energy LLC | Fruita, CO 81521 | Oil & Gas Operator | Sep 2011 |
200 | Fellows Energy LTD | Price, UT 84501-2016 | Gas Operator | Sep 2007 |