| 1 | 3R Oil Corporation | Healdton, OK 73438-0306 | Oil Operator | Apr 2022 |
| 2 | Adobe Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Aug 2002 |
| 3 | Aei Production Company | Edmond, OK 73083 | Oil & Gas Operator | Mar 2014 |
| 4 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 5 | Almac Engineering | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2007 |
| 6 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 7 | American Petroleum Corp | Addison, TX 75001 | Oil & Gas Operator | May 2025 |
| 8 | American Quasar Petroleum Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2014 |
| 9 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 10 | Apache Energy Resources Corp | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 11 | Arbuckle Enterprises, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2025 |
| 12 | Arcotex Oil & Gas Inc | Gainesville, TX 76241-1357 | Oil & Gas Operator | Mar 2025 |
| 13 | Ardmore Production & Exploration Co | Ardmore, OK 73401 | Oil & Gas Operator | Feb 2025 |
| 14 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 15 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 16 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | May 2025 |
| 17 | Arrow Operating Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2024 |
| 18 | Arvine Pipe & Supply Co Inc | Norman, OK 73069-8224 | Oil & Gas Operator | Jul 2015 |
| 19 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 20 | Aycox Robert D | Healdton, OK 73438 | Oil Operator | Sep 2022 |
| 21 | B & W Operating, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 22 | B B R Oil Corporation | Norman, OK 73069 | Oil & Gas Operator | Feb 2025 |
| 23 | Bannon Operating Inc | Houston, TX 77068 | Oil & Gas Operator | Sep 2003 |
| 24 | Baruch-Foster Corporation | Oklahoma City, OK 73126-6770 | Oil & Gas Operator | Feb 2001 |
| 25 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2025 |
| 26 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 27 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2025 |
| 28 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 29 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 30 | Bentley & Laing | Wichita Falls, TX 76302 | Oil & Gas Operator | Feb 2002 |
| 31 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 32 | Billy Judd Investment Company | Ardmore, OK 73401-1095 | Oil & Gas Operator | Feb 2025 |
| 33 | Black Creek Exploration LLC | Healdton, OK 73438 | Oil & Gas Operator | Mar 2025 |
| 34 | Black Mesa Energy LLC | Tulsa, OK 74103-4334 | Oil & Gas Operator | Feb 2025 |
| 35 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | May 2025 |
| 36 | Bogo Energy Corporation | Oklahoma City, OK 73134-1002 | Oil & Gas Operator | Mar 2025 |
| 37 | Bond Drilling Company | Marietta, OK 73448-0372 | Oil & Gas Operator | Apr 2017 |
| 38 | Bond Oil & Gas LLC | Marietta, OK 73448 | Oil & Gas Operator | Mar 2025 |
| 39 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 40 | BP Explorationinc/Ofb See #17756 | | Oil & Gas Operator | Apr 2015 |
| 41 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | May 2025 |
| 42 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 43 | Brewer Carroll L | Edmond, OK 73003-0010 | Oil & Gas Operator | Feb 2025 |
| 44 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 45 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 46 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 47 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Mar 2025 |
| 48 | C & Y Casing Pulling Company | Duncan, OK 73533 | Oil & Gas Operator | Mar 2025 |
| 49 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Mar 2025 |
| 50 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 51 | Carlton, Richard L | | Oil & Gas Operator | Aug 1999 |
| 52 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Mar 2025 |
| 53 | Cayman Resources Corporation | Tulsa, OK 74119-1323 | Oil & Gas Operator | Jun 2001 |
| 54 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 55 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2025 |
| 56 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 57 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | May 2025 |
| 58 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 59 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2025 |
| 60 | Coho Oil & Gas Inc | Coppell, TX 75019-8288 | Oil & Gas Operator | Mar 2015 |
| 61 | Command Energy Operating LLC | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2025 |
| 62 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 63 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | May 2025 |
| 64 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 65 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 66 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 67 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 68 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 69 | CSX Oil & Gas Corporation | Houston, TX 77210-4326 | Oil & Gas Operator | Mar 1993 |
| 70 | D & J Oil Company | Kermit, TX 79745 | Oil & Gas Operator | May 2025 |
| 71 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | May 2025 |
| 72 | Dabb Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Aug 2020 |
| 73 | Dakota Oil Company | Hebbronville, TX 78361 | Oil & Gas Operator | May 2025 |
| 74 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 75 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | May 2025 |
| 76 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Feb 2025 |
| 77 | Dean'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Feb 2025 |
| 78 | Dehart Company (The) | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2025 |
| 79 | Deka Exploration Inc | Oklahoma City, OK 73113-0057 | Oil & Gas Operator | Nov 2019 |
| 80 | Delek Energy Systems Us Inc | Denver, CO 80202 | Oil & Gas Operator | Oct 2011 |
| 81 | Delta D Operations | Wilson, OK 73463 | Oil & Gas Operator | Jul 2014 |
| 82 | Delta D Operations Inc | Ardmore, OK 73401-8678 | Oil & Gas Operator | Apr 2014 |
| 83 | Depco Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |
| 84 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 85 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 86 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 87 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 88 | Dixie Petroleum Inc | Cashion, OK 73016 | Oil & Gas Operator | May 2001 |
| 89 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
| 90 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |
| 91 | Duncan Oil Properties, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 92 | E2 Operating LLC | Tulsa, OK 74135 | Oil & Gas Operator | May 2025 |
| 93 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | May 2025 |
| 94 | Eagle Rock Mid-Continent Operating LLC | Tulsa, OK 74103-3703 | Oil & Gas Operator | Feb 2025 |
| 95 | Edinger Engineering, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 96 | Edwards & Leach Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2005 |
| 97 | Eight Round Corporation | Seminole, OK 74818-1482 | Oil & Gas Operator | Jul 2012 |
| 98 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Mar 2025 |
| 99 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Apr 2025 |
| 100 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | May 2025 |