| 1 | D & B Johnson Family LLC | Owasso, OK 74055-7578 | Oil Operator | Apr 2025 |
| 2 | D & B Oil Company | Graham, TX 76450 | Oil & Gas Operator | May 2026 |
| 3 | D & B Operating LLC | Ringwood, OK 73768 | Oil Operator | Jan 2023 |
| 4 | D & B Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 5 | D & D Drilling | Kingston, OK 73439-9549 | Oil & Gas Operator | May 2000 |
| 6 | D & D Energy Inc | Sapulpa, OK 74066-8734 | Oil & Gas Operator | May 2013 |
| 7 | D & D Oil Company | Dayton, TX 77535 | Oil & Gas Operator | May 2026 |
| 8 | D & D Pipe & Equipment Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2005 |
| 9 | D & D Services | Cement, OK 73017-9712 | Oil Operator | Feb 2017 |
| 10 | D & E Oil Co | Perryton, TX 79070 | Oil & Gas Operator | May 2026 |
| 11 | D & F Oil Company | Dewey, OK 74029 | Oil & Gas Operator | Apr 2001 |
| 12 | D & G Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Dec 1995 |
| 13 | D & G Oil & Gas Company Inc | Enid, OK 73702-2027 | Oil & Gas Operator | Nov 2021 |
| 14 | D & G Operating Company, Inc. | Houston, TX 77056 | Oil & Gas Operator | May 2026 |
| 15 | D & H Oil Inc | Garber, OK 73738-0657 | Oil & Gas Operator | Apr 2021 |
| 16 | D & J Oil Company | Kermit, TX 79745 | Oil & Gas Operator | May 2026 |
| 17 | D & J Oil Company Of Okla Inc | Enid, OK 73706-0129 | Oil & Gas Operator | May 1999 |
| 18 | D & J Tank Trucks Inc | Drumright, OK 74030 | Oil Operator | Feb 2026 |
| 19 | D & L Operating LLC | Morris, OK 74445 | Oil & Gas Operator | Jan 2026 |
| 20 | D & M Production Co Inc | Drumright, OK 74030 | Oil & Gas Operator | Jan 2026 |
| 21 | D & P Tank Service, Inc. | | Oil Operator | Mar 2000 |
| 22 | D & S Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | May 2026 |
| 23 | D & S Operating | Texhoma, OK 73949 | Oil & Gas Operator | May 2001 |
| 24 | D & T Swabbing & Well Serv Inc | Hennessey, OK 73742-0124 | Oil & Gas Operator | Dec 2025 |
| 25 | D B D Oil & Gas Company | Houston, TX 77001 | Oil & Gas Operator | Mar 2015 |
| 26 | D C Energy | Tulsa, OK 74137 | Oil Operator | Jun 2009 |
| 27 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 28 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | May 2026 |
| 29 | D O Walker Inc | Stratford, OK 74872 | Oil Operator | Jan 2026 |
| 30 | D-B-K Operating Company | | Oil Operator | Jan 2006 |
| 31 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | May 2026 |
| 32 | D-Pex Operating Company | | Oil & Gas Operator | Sep 2004 |
| 33 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | May 2026 |
| 34 | Dab And Associates Inc | Crescent, OK 73028-0580 | Oil & Gas Operator | Nov 2014 |
| 35 | Dab Limited | Oklahoma City, OK 73116-9082 | Oil & Gas Operator | Aug 2013 |
| 36 | Dabb Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Aug 2020 |
| 37 | Dahl & Smith Oil Co | Barnsdall, OK 74002 | Oil & Gas Operator | Aug 1999 |
| 38 | Dahl Randall Lee | Barnsdall, OK 74002 | Oil Operator | Jan 2026 |
| 39 | Dahl SWD Facility #1 LLC | Oklahoma City, OK 73118 | Gas Operator | Dec 2017 |
| 40 | Daisy Pointer | | Oil Operator | Jul 1999 |
| 41 | Dakota Exploration LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 42 | Dakota Oil Company | Hebbronville, TX 78361 | Oil & Gas Operator | May 2026 |
| 43 | Dalco Petroleum Inc | | Oil & Gas Operator | Jan 2006 |
| 44 | Dalcor Energy LLC | Duncan, OK 73534 | Oil & Gas Operator | Nov 2025 |
| 45 | Dale George | Elmore City, OK 73433 | Oil & Gas Operator | Aug 2022 |
| 46 | Dale Jimmy | Davis, OK 73030 | Oil & Gas Operator | Mar 2015 |
| 47 | Dalen Resources Oil & Gas Co | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 48 | Dales Tank Service Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Jan 2026 |
| 49 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 50 | Damson Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Mar 2005 |
| 51 | Dana Petroleum Inc | Salt Lake City, UT 84047 | Oil & Gas Operator | Nov 1998 |
| 52 | Dance Oil Co | Denver, CO 80202 | Oil & Gas Operator | May 1993 |
| 53 | Danco Enterprises Inc | Ada, OK 74820 | Oil Operator | Apr 2008 |
| 54 | Danick Operating USA Inc | McKinney, TX 75072-9071 | Oil & Gas Operator | Oct 2022 |
| 55 | Daniel Resource Dev Inc | Tomball, TX 77375-8919 | Oil & Gas Operator | Oct 2009 |
| 56 | Daniel-Price Exploration Co | Tulsa, OK 74119 | Gas Operator | Apr 2011 |
| 57 | Daniels Corporation, The | Seabrook, TX 77586 | Oil & Gas Operator | May 2026 |
| 58 | Daniels Danny | Tishomingo, OK 73460-0853 | Oil Operator | Apr 2015 |
| 59 | Daniels Earlene Inc | Follett, TX 79034-9736 | Oil & Gas Operator | Mar 2015 |
| 60 | Daniels Energy | Pampa, TX 79066 | Oil & Gas Operator | May 2026 |
| 61 | Danny Engel Operating LLC | Ada, OK 74820-1388 | Oil Operator | Feb 2026 |
| 62 | Dar-Lon Operating Company | Lamont, OK 74643 | Oil & Gas Operator | Oct 2000 |
| 63 | Darco Petroleum Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Dec 2020 |
| 64 | Darden Energy Corp | Hennessey, OK 73742 | Oil & Gas Operator | Jul 1999 |
| 65 | Darling Dan Oil | | Oil & Gas Operator | Sep 2018 |
| 66 | Darling Oil Corporation | Lamont, OK 74643 | Oil & Gas Operator | Feb 2026 |
| 67 | Darnell Alma | Bristow, OK 74010 | Oil & Gas Operator | Jun 2000 |
| 68 | Darnell Bobby J | Oklahoma City, OK 73112-8884 | Oil & Gas Operator | Feb 2026 |
| 69 | Darrah Oil Company, LLC | Wichita, KS 67201 | Oil & Gas Operator | May 2026 |
| 70 | Darrell'S Drilling Inc | Konawa, OK 74849 | Oil Operator | Jan 2026 |
| 71 | Darriel C Ray | | Oil Operator | Jun 2020 |
| 72 | Dart Oil Properties | Enid, OK 73703 | Oil & Gas Operator | Oct 1992 |
| 73 | Darwin Allen Dba Wil-Mar Operations | Duncan, OK 73534-1566 | Oil & Gas Operator | Oct 2016 |
| 74 | Dash Operating LLC | Oklahoma City, OK 73118-5031 | Oil & Gas Operator | Dec 2025 |
| 75 | Data Energy Inc | Evergreen, CO 80439 | Oil & Gas Operator | Jul 2018 |
| 76 | Daube Company The | Ardmore, OK 73401 | Oil & Gas Operator | Feb 2026 |
| 77 | Daube Exploration Company | Ardmore, OK 73402 | Oil & Gas Operator | Nov 2020 |
| 78 | Dauco Petroleum Corporation | Rowlett, TX 75089-3066 | Oil & Gas Operator | Jan 2021 |
| 79 | Davco Productions Inc | Springer, OK 73458-8191 | Oil & Gas Operator | Jun 2021 |
| 80 | David E Morgan Inc | Danville, CA 94506-2035 | Oil & Gas Operator | Feb 2026 |
| 81 | David L Greene II LLC | | Oil Operator | Feb 2026 |
| 82 | David Ridley Oil LLC | Tecumseh, OK 74873 | Oil Operator | Feb 2026 |
| 83 | Davidson Energy Inc | Perry, OK 73077 | Oil & Gas Operator | Feb 2026 |
| 84 | Davidson Gene | Perry, OK 73077-0144 | Oil & Gas Operator | Aug 2014 |
| 85 | Davies & Company Inc | Tulsa, OK 74114 | Oil & Gas Operator | Nov 2000 |
| 86 | Davis & Davis | | Oil & Gas Operator | Dec 2021 |
| 87 | Davis & Davis Oil Properties Inc | Morris, OK 74445 | Oil Operator | Jan 2026 |
| 88 | Davis & Hamilton Oil Company | Edmond, OK 73083-3670 | Oil Operator | Aug 2022 |
| 89 | Davis Bros. Oil Producers, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2020 |
| 90 | Davis Charles K | Morris, OK 74445-2201 | Oil & Gas Operator | Apr 2015 |
| 91 | Davis Consulting LLC | Tulsa, OK 74104 | Oil Operator | Apr 2024 |
| 92 | Davis Henry | Tulsa, OK 74135-3567 | Oil & Gas Operator | Dec 1994 |
| 93 | Davis Jared | Wann, OK 74083-9610 | Oil & Gas Operator | Jan 2026 |
| 94 | Davis Jim L | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 95 | Davis Kendall | Bethany, OK 73008-4714 | Oil Operator | Aug 2016 |
| 96 | Davis Operating Company | Elysian Field, TX 75642 | Oil & Gas Operator | May 2026 |
| 97 | Davis William H | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2014 |
| 98 | Davis William W | | Oil Operator | Jun 2024 |
| 99 | Davis, Joe D. | Fort Smith, AR 72903 | Gas Operator | Mar 2015 |
| 100 | Davis/Osage Corp | Tulsa, OK 74103 | Oil Operator | Jan 2001 |