| 101 | Aikman Brothers | Midland, TX 79705 | Oil & Gas Operator | Dec 2000 |
| 102 | Aikman Brothers, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Aug 2025 |
| 103 | Ailey A C | Stroud, OK 74079-9209 | Oil & Gas Operator | Nov 2021 |
| 104 | Ajb Oil LLC | Tulsa, OK 74114-5218 | Oil Operator | Jul 2025 |
| 105 | Aker Oil & Gas Company | Tulsa, OK 74105-2216 | Oil & Gas Operator | Aug 2013 |
| 106 | Akin Jr Verna M & Emsley F | Maud, OK 74854 | Oil & Gas Operator | Apr 2002 |
| 107 | Aladdin Energy, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Feb 1999 |
| 108 | Aladdin Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2021 |
| 109 | Alameda Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 1994 |
| 110 | Alamo Resources Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 111 | Alamosa Drilling Inc | Dallas, TX 75206-1841 | Oil & Gas Operator | Apr 2024 |
| 112 | Alan Energy Coinc The/Ofb | | Gas Operator | Aug 1991 |
| 113 | Albright Paul D Or Inger J | Okemah, OK 74859-9309 | Oil & Gas Operator | Aug 2025 |
| 114 | Albritton Resources Inc | Dallas, TX 75206 | Oil & Gas Operator | Feb 2001 |
| 115 | Alda Oil & Gas Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Jan 2004 |
| 116 | Aleco Production Company | | Oil & Gas Operator | Nov 1997 |
| 117 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 118 | Alexander Howard | Tulsa, OK 74114 | Oil & Gas Operator | Feb 1996 |
| 119 | Alexander Oil Company | Loco, OK 73442-9409 | Oil & Gas Operator | Sep 2025 |
| 120 | Alexander Production Company | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2021 |
| 121 | Alexander, Milt M | | Oil Operator | Mar 2015 |
| 122 | Alexander-Loop Oil Prop. Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Nov 1998 |
| 123 | Alford Oil Corporation | Spring, TX 77379 | Oil & Gas Operator | May 2006 |
| 124 | Alford Paul | Ada, OK 74820 | Oil Operator | Jan 2020 |
| 125 | All Exploration LLC | Oklahoma City, OK 73120-7829 | Oil & Gas Operator | Aug 2025 |
| 126 | Allen & Allen Oil Co | | Oil Operator | Aug 2025 |
| 127 | Allen Benne | Ramona, OK 74061-3612 | Oil Operator | Aug 2010 |
| 128 | Allen Delmar | Okemah, OK 74859-9801 | Oil & Gas Operator | Dec 2000 |
| 129 | Allen J W Revocable Trust | Tulsa, OK 74101-0411 | Oil Operator | Nov 1998 |
| 130 | Allen Kent | Okemah, OK 74859-9700 | Oil Operator | Aug 2025 |
| 131 | Allen Michael | Broken Arrow, OK 74014-2239 | Oil & Gas Operator | Aug 2025 |
| 132 | Allen Oil & Gas LLC | Ardmore, OK 73401 | Oil Operator | Aug 2022 |
| 133 | Allen Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Jun 2016 |
| 134 | Allen Richard R | Bartlesville, OK 74005 | Oil Operator | Aug 1999 |
| 135 | Allen Wade | Okmulgee, OK 74447-9717 | Oil & Gas Operator | Dec 2021 |
| 136 | Allenergy Operating Co Inc | Coffeyville, KS 67337-6653 | Oil & Gas Operator | Mar 2015 |
| 137 | Alliance Oil & Gas Co Inc | Corinth, TX 76205 | Oil & Gas Operator | Mar 2015 |
| 138 | Alliance Resources Corporation | Dallas, TX 75367 | Oil & Gas Operator | Nov 2024 |
| 139 | Allied Operating LLC | Bowling Green, KY 42101-3980 | Oil & Gas Operator | Sep 2015 |
| 140 | Allied Petroleum Company | | Gas Operator | Dec 1992 |
| 141 | Allied Petroleum Inc | Oklahoma City, OK 73116-1516 | Oil & Gas Operator | Jun 2014 |
| 142 | Alligator Rock Well Service LLC | Velma, OK 73491-0627 | Oil & Gas Operator | Sep 2025 |
| 143 | Allison Tom & Shelly Dba T & S Oil Company | Bartlesville, OK 74006-0722 | Oil & Gas Operator | May 2025 |
| 144 | Almac Engineering | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2007 |
| 145 | Almack John And Glenda | Perry, OK 73077-8819 | Oil & Gas Operator | Apr 2016 |
| 146 | Almont Energy LLC | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Oct 2021 |
| 147 | Alpar Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2011 |
| 148 | Alpha Energy Texas Operating LLC | Denver, CO 80222 | Oil & Gas Operator | Aug 2025 |
| 149 | Alpha Oil Company | | Oil Operator | Jul 2004 |
| 150 | Alpha Petro Development Inc | Tulsa, OK 74136-7048 | Oil & Gas Operator | May 2013 |
| 151 | Alpine Inc | Oklahoma City, OK 73134-2504 | Oil & Gas Operator | Feb 2024 |
| 152 | Alpine Oil & Gas Inc | Edmond, OK 73083-1264 | Oil & Gas Operator | Mar 2008 |
| 153 | Alsup 1-19 LLC | Lindsay, OK 73052 | Oil Operator | Aug 2025 |
| 154 | Alta Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 155 | Altex Energy Corporation | Oklahoma City, OK 73142-1920 | Oil & Gas Operator | Mar 2015 |
| 156 | Altex Oil Corp | Breckenridge, CO 80424-1057 | Oil & Gas Operator | Dec 1999 |
| 157 | Altex Resources, Inc. | Carney, OK 74832 | Oil & Gas Operator | Mar 2015 |
| 158 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Dec 2025 |
| 159 | Alvarado 2014 LLC | Houston, TX 77027 | Oil & Gas Operator | Dec 2025 |
| 160 | Am Oil Company | Cyril, OK 73029 | Oil & Gas Operator | Aug 2025 |
| 161 | Amarillo Exploration, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Dec 2025 |
| 162 | Amax Oil & Gas Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 163 | Amax Petroleum Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2012 |
| 164 | Ambrit Energy Corp. | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 165 | Amcole Energy Corporation | Dallas, TX 75231 | Oil & Gas Operator | Aug 2000 |
| 166 | Amer-Tex Energy Inc | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Feb 2012 |
| 167 | Amerac Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2013 |
| 168 | Amerex Corporation | Edmond, OK 73013-1044 | Oil & Gas Operator | Apr 2020 |
| 169 | American Capital Corporation | San Marcos, CA 92069 | Oil & Gas Operator | Sep 2014 |
| 170 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 171 | American Domestic MGMT Inc | Tulsa, OK 74155 | Oil & Gas Operator | Apr 2015 |
| 172 | American Energy LLC | Lake Zurich, IL 60047-0129 | Oil & Gas Operator | Nov 2014 |
| 173 | American Energy Operations Inc | Houston, TX 77002 | Oil & Gas Operator | Nov 1992 |
| 174 | American Energy Recovery Inc | Oklahoma City, OK 73123-0549 | Oil & Gas Operator | Aug 2017 |
| 175 | American Int'L Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 176 | American Natural Energy Corp | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2025 |
| 177 | American Natural Resources LLC | Tulsa, OK 74145-1117 | Oil & Gas Operator | May 2020 |
| 178 | American Petrofina Co Of TX | Dallas, TX 75221-2159 | Oil & Gas Operator | Nov 2000 |
| 179 | American Petroleum & Environmental Consultants Inc | Edmond, OK 73013-8801 | Oil & Gas Operator | Aug 2025 |
| 180 | American Petroleum & Mineral Co Inc | Seminole, OK 74868 | Oil & Gas Operator | Aug 2019 |
| 181 | American Petroleum Corp | Addison, TX 75001 | Oil & Gas Operator | Dec 2025 |
| 182 | American Quasar Petroleum Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2014 |
| 183 | American Star Energy & Mineral Corp | Amarillo, TX 79102-2283 | Oil & Gas Operator | Jun 2015 |
| 184 | American Trading & Prod Corp | Houston, TX 77040-6471 | Oil & Gas Operator | Nov 2014 |
| 185 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Aug 2025 |
| 186 | Americana Energy Inc | Byng, OK 74820 | Oil & Gas Operator | Aug 2025 |
| 187 | Americana Petroleum Corp | Waco, TX 76710 | Oil Operator | Aug 1992 |
| 188 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 189 | Ameritech Oil & Gas Corporation | Dallas, TX 75248 | Oil & Gas Operator | May 1996 |
| 190 | Amerril Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 191 | Amerroyal Energy LLC | Shawnee, OK 74804-4163 | Oil & Gas Operator | Dec 2022 |
| 192 | Ames Oil Corporation Of Texas | Austin, TX 78720 | Oil & Gas Operator | Mar 2015 |
| 193 | Ammons, Dean E | | Oil Operator | Jan 2021 |
| 194 | Amplify Oklahoma Operating LLC | Houston, TX 77002-4800 | Oil & Gas Operator | Aug 2025 |
| 195 | Amsito Oil Company LLC | Denton, TX 76206-0689 | Oil Operator | Apr 2001 |
| 196 | Amsler Jerry & Denese | Enid, OK 73703-9300 | Oil & Gas Operator | Jul 2020 |
| 197 | Amvest Osage Inc | Skiatook, OK 74070-0970 | Oil & Gas Operator | Aug 2025 |
| 198 | An-Son Corp | Oklahoma City, OK 73124 | Oil & Gas Operator | Jan 2006 |
| 199 | Anabaco Operating Company | Stillwater, OK 74076-1958 | Oil & Gas Operator | Mar 2014 |
| 200 | Anadarko Basin Oil& Gas Lease Inc | Sayre, OK 73662 | Oil & Gas Operator | Jan 1997 |