| 1 | 21ST Century Investment Co | Tulsa, OK 74114-4220 | Oil & Gas Operator | Oct 2025 |
| 2 | 3 BC Co Inc | Cushing, OK 74023-1268 | Oil & Gas Operator | Mar 2022 |
| 3 | A & M Oilfield Sup Inc | | Oil & Gas Operator | Aug 1999 |
| 4 | A E W Inc | Okmulgee, OK 74447-0267 | Oil & Gas Operator | Mar 2015 |
| 5 | A-1 Oil Operators | Beggs, OK 74421-0329 | Oil & Gas Operator | Jan 2013 |
| 6 | Abarr Trust (The) | Oklahoma City, OK 73179 | Oil & Gas Operator | Nov 2025 |
| 7 | ABC Oil & Gas | Morris, OK 74445-0273 | Oil & Gas Operator | May 2025 |
| 8 | Adams Evertte | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 9 | Adkins Jim | Weleetka, OK 74880-8057 | Oil & Gas Operator | Apr 2020 |
| 10 | Admiral Resource Inc | Broken Arrow, OK 74012 | Oil & Gas Operator | Apr 2020 |
| 11 | Adrian Beachel | Henryetta, OK 74437 | Oil & Gas Operator | Oct 2025 |
| 12 | Advance Oil Corporation | Kiefer, OK 74041-4105 | Oil & Gas Operator | Nov 2025 |
| 13 | Ajb Oil LLC | Tulsa, OK 74114-5218 | Oil Operator | Oct 2025 |
| 14 | Alamo Resources Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 15 | Allen Wade | Okmulgee, OK 74447-9717 | Oil & Gas Operator | Dec 2021 |
| 16 | Allenergy Operating Co Inc | Coffeyville, KS 67337-6653 | Oil & Gas Operator | Mar 2015 |
| 17 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Dec 2025 |
| 18 | Amerex Corporation | Edmond, OK 73013-1044 | Oil & Gas Operator | Apr 2020 |
| 19 | American Energy LLC | Lake Zurich, IL 60047-0129 | Oil & Gas Operator | Nov 2014 |
| 20 | American Energy Operations Inc | Houston, TX 77002 | Oil & Gas Operator | Nov 1992 |
| 21 | American Petroleum & Environmental Consultants Inc | Edmond, OK 73013-8801 | Oil & Gas Operator | Oct 2025 |
| 22 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 23 | Anderson, Carl T. | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2014 |
| 24 | Anjet Petroleum Company Inc | Gulfport, MS 39507-1301 | Oil & Gas Operator | Aug 2017 |
| 25 | Anson J W | Seminole, OK 74818-1280 | Oil & Gas Operator | Oct 2020 |
| 26 | Anson Robert L & Teresa M | Seminole, OK 74868 | Oil & Gas Operator | Oct 2025 |
| 27 | Aog Operating LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Oct 2025 |
| 28 | Arcadia Refining Company | Tyler, TX 75701 | Oil & Gas Operator | Jan 1994 |
| 29 | Arica Energy Company | Beggs, OK 74421 | Oil Operator | Jun 1994 |
| 30 | Aries Exploration Co Inc | Maud, OK 74854-0160 | Oil & Gas Operator | May 2013 |
| 31 | Arkoma Resources LLC | Henryetta, OK 74437 | Oil & Gas Operator | Nov 2025 |
| 32 | Arrow Energy, Incorporated | Houston, TX 77008 | Oil & Gas Operator | Nov 2025 |
| 33 | Asher Tip Corporation | Fairfax, OK 74637-0308 | Oil & Gas Operator | Nov 2003 |
| 34 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 35 | Atchley Resources, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2025 |
| 36 | Autumn Exploration LTD | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2015 |
| 37 | Avers Harvey G Energy Expl | | Oil & Gas Operator | May 2013 |
| 38 | Ayluma Operating Inc | Dewar, OK 74437 | Oil & Gas Operator | Oct 2024 |
| 39 | B & H Oil Company | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2025 |
| 40 | B & O Drilling Inc | Ada, OK 74820-8065 | Oil & Gas Operator | Sep 2014 |
| 41 | B B & B Oil Co | Tulsa, OK 74114 | Oil & Gas Operator | Mar 2014 |
| 42 | B B R Oil Corporation | Norman, OK 73069 | Oil & Gas Operator | Oct 2025 |
| 43 | Baca Petroleum Corporation | Denver, CO 80202 | Oil & Gas Operator | Oct 2000 |
| 44 | Bacon Fred Estate Of | Glenpool, OK 74033-9802 | Oil & Gas Operator | Apr 2020 |
| 45 | Bailey David A | Mounds, OK 74047 | Oil & Gas Operator | Oct 2025 |
| 46 | Bailey Michael L & Pamela D Dba MPB Oil & Gas | Paden, OK 74860-9789 | Oil & Gas Operator | Nov 2025 |
| 47 | Bailey Petroleum Corporation | Oklahoma City, OK 73159-7652 | Oil & Gas Operator | Feb 2004 |
| 48 | Baker Oil & Gas | St Louisville, OH 43071 | Oil & Gas Operator | Sep 2014 |
| 49 | Bald Hill Oil Company | Oklahoma City, OK 73107 | Oil & Gas Operator | Apr 2013 |
| 50 | Bank Oil Services | Muskogee, OK 74403-4025 | Oil & Gas Operator | Mar 2020 |
| 51 | Barnes Exploration Co. | Nashville, TN 37209 | Oil & Gas Operator | Feb 1995 |
| 52 | Barnett John | Skiatook, OK 74070 | Oil & Gas Operator | Oct 2025 |
| 53 | Barrett Oil LLC | Muskogee, OK 74403 | Oil Operator | Oct 2025 |
| 54 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 55 | Becktol Linda G | Morris, OK 74445 | Oil & Gas Operator | Jun 2025 |
| 56 | Belisle Pete H | Tulsa, OK 74133 | Oil & Gas Operator | Apr 2015 |
| 57 | Bell Jack | Beggs, OK 74421-2107 | Oil & Gas Operator | Apr 2020 |
| 58 | Belport Oil Inc | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2025 |
| 59 | Benchmark Resources Group LTD | Sapulpa, OK 74066-3238 | Oil & Gas Operator | Dec 2000 |
| 60 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 61 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 62 | Bertschinger Oil Company | Oklahoma City, OK 73116-6534 | Oil & Gas Operator | Nov 2015 |
| 63 | Beta Operating Company, LLC | Houston, TX 77210 | Oil & Gas Operator | Apr 2020 |
| 64 | Betty L Wood Dba Able Oil Company | Morris, OK 74445-2303 | Oil & Gas Operator | Oct 2025 |
| 65 | Biddy Audrian Q | Okemah, OK 74859 | Oil & Gas Operator | Aug 2013 |
| 66 | Big Sky Exploration LLC | Dana Point, CA 92629-2889 | Oil Operator | Apr 2020 |
| 67 | Bilbe Operating Company | Sapulpa, OK 74066 | Oil & Gas Operator | Apr 2003 |
| 68 | Billy Jack Sharber Operating LLC | Seminole, OK 74868 | Oil & Gas Operator | Nov 2025 |
| 69 | Bison Petroleum Inc | Tulsa, OK 74137 | Oil & Gas Operator | Nov 2004 |
| 70 | Black Energy LLC | Okmulgee, OK 74447 | Oil Operator | Oct 2025 |
| 71 | Black Gold Energy LLC | Jenks, OK 74037 | Oil Operator | Jun 2024 |
| 72 | Blackrock Energy LLC | Wagoner, OK 74467 | Oil Operator | Apr 2025 |
| 73 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Dec 2025 |
| 74 | BMC Petroleum Inc | Enid, OK 73701-2700 | Oil & Gas Operator | Nov 2025 |
| 75 | Bogie A W & Deem G A | Boynton, OK 74422 | Oil & Gas Operator | Jan 2007 |
| 76 | Bona Tangent LLC | Tulsa, OK 74133 | Oil & Gas Operator | Oct 2025 |
| 77 | Bonnell Frank A | Stuart, OK 74570-5514 | Oil & Gas Operator | Dec 2021 |
| 78 | Boone Operating LLC | Oklahoma City, OK 73118-6014 | Oil & Gas Operator | Oct 2025 |
| 79 | Booth John H Inc | Tulsa, OK 74170 | Oil Operator | Sep 2019 |
| 80 | Bracksieck Lloyd H | Boulder, CO 80303 | Oil & Gas Operator | Feb 2019 |
| 81 | Bricar Inc | Oklahoma City, OK 73108 | Oil & Gas Operator | Nov 1998 |
| 82 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 83 | Brock Exploration Corp | New Orleans, LA 70112-1707 | Oil & Gas Operator | Jan 1999 |
| 84 | Broken Arrow Petroleum Company | | Gas Operator | May 2013 |
| 85 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 86 | Brower, Robert C. | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2025 |
| 87 | Brown Dorla M Trust | Tulsa, OK 74133-2926 | Oil & Gas Operator | Dec 2021 |
| 88 | Brown Drilling Company | Mounds, OK 74047-4263 | Oil & Gas Operator | Oct 2020 |
| 89 | Burchfield Lawrence & VIrginia | Morris, OK 74445-2814 | Gas Operator | Aug 2018 |
| 90 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 91 | Byars Bill Inc | Okmulgee, OK 74447-0850 | Oil & Gas Operator | Apr 2015 |
| 92 | C & C Productions LLC | Muskogeee, OK 74402 | Oil & Gas Operator | Oct 2025 |
| 93 | C & J Exploration LLC | Colorado Springs, CO 80920-3946 | Oil & Gas Operator | Oct 2022 |
| 94 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 95 | C & T Energy LLC | Morris, OK 74445-2667 | Oil & Gas Operator | Oct 2025 |
| 96 | C D Operating Company Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 97 | C L Conner | Humble, TX 77338 | Oil & Gas Operator | Oct 2025 |
| 98 | Cabco Energy Corporation | Hoffman, OK 74437 | Oil & Gas Operator | Dec 2018 |
| 99 | Calvert Operating LLC | Oklahoma City, OK 73118 | Oil Operator | Sep 2025 |
| 100 | Calyx Energy III LLC | Tulsa, OK 74136-4226 | Oil & Gas Operator | Oct 2025 |