| 1 | 101 Energy Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Mar 2018 |
| 2 | 12TH Man Energy, LLC | Houston, TX 77069-4410 | Oil & Gas Operator | May 2018 |
| 3 | 1776 Energy Operators, LLC | Houston, TX 77070 | Oil & Gas Operator | May 2018 |
| 4 | 1836 Resources, LLC | Houston, TX 77070 | Oil & Gas Operator | May 2018 |
| 5 | 1894 Petroleum Partners, LLC | Odessa, TX 79763 | Oil Operator | May 2018 |
| 6 | 19TH Hole Production, LLC | Humble, TX 77346 | Oil & Gas Operator | May 2018 |
| 7 | 2 S Operating | Iowa Park, TX 76367 | Oil Operator | May 2018 |
| 8 | 2 T Production | | Oil & Gas Operator | May 2018 |
| 9 | 2 W Petroleum | Brownwood, TX 76804-157 | Oil & Gas Operator | May 2018 |
| 10 | 2-K Operating | Corsicana, TX 75109-706 | Oil & Gas Operator | May 2018 |
| 11 | 2014 GS Holdings Operating, LLC | Arlington, TX 76006 | Oil Operator | May 2018 |
| 12 | 20TH Century Pipe & Equip.Co.Inc | | Oil & Gas Operator | Aug 2003 |
| 13 | 299 Production, LLC | Judson, TX 75660 | Oil & Gas Operator | Nov 2016 |
| 14 | 2C Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Aug 2017 |
| 15 | 3 $ Oil Company | | Oil Operator | Dec 1997 |
| 16 | 3 Amigos Oil Co. | Odessa, TX 79766-9416 | Oil & Gas Operator | May 2018 |
| 17 | 3 B Enterprises, Inc. | Gordon, TX 76453 | Gas Operator | May 2018 |
| 18 | 3 H Well Service Inc. | Muenster, TX 76252 | Oil & Gas Operator | May 2018 |
| 19 | 3 S Production, Inc. | Cisco, TX 76437 | Oil & Gas Operator | May 2018 |
| 20 | 3 W Investments LLC | Pleasanton, TX 78064 | Oil & Gas Operator | May 2018 |
| 21 | 3 W Oil & Gas | Grandfalls, TX 79742 | Oil Operator | May 2018 |
| 22 | 3-C | | Oil & Gas Operator | Mar 2008 |
| 23 | 3-C Oil Company, Inc. | | Oil & Gas Operator | Nov 2002 |
| 24 | 3-D Oil & Gas | Winters, TX 79567 | Oil & Gas Operator | May 2018 |
| 25 | 3-L Drilling | Abilene, TX 79605 | Oil & Gas Operator | May 2018 |
| 26 | 3-M Energy Corporation | San Angelo, TX 76902-3986 | Oil & Gas Operator | Jun 2017 |
| 27 | 3-R Production, Inc. | | Oil & Gas Operator | May 2018 |
| 28 | 3-T Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2018 |
| 29 | 31 Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2018 |
| 30 | 324 Oil & Gas, LTD. | Goliad, TX 77963 | Oil & Gas Operator | May 2018 |
| 31 | 324 Ranch Oil | | Oil & Gas Operator | Jun 2004 |
| 32 | 338 Oil & Gas, Inc. | Devine, TX 78016 | Oil Operator | May 2018 |
| 33 | 375 Energy, Inc. | | Oil & Gas Operator | Jul 2013 |
| 34 | 38 Oil & Gas, L.L.C. | Fullerton, CA 92834 | Oil & Gas Operator | May 2018 |
| 35 | 39 Crude, L.C. | | Oil & Gas Operator | Mar 2008 |
| 36 | 3B Energy LLC | Amarillo, TX 79105 | Oil & Gas Operator | May 2018 |
| 37 | 3B Ranch | Houston, TX 77035 | Oil Operator | May 2018 |
| 38 | 3D Oil Company, LLC | Corpus Chrsti, TX 78406 | Oil Operator | May 2018 |
| 39 | 3D Petroleum Corp. | Norcross, GA 30092 | Oil Operator | May 2018 |
| 40 | 3K Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | May 2018 |
| 41 | 3MB Oil & Gas, LLC | Bakersfield, CA 93390 | Oil & Gas Operator | Feb 2018 |
| 42 | 3R-B Oil Venture | | Oil & Gas Operator | Feb 2012 |
| 43 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2018 |
| 44 | 4 J'S Production | Zephyr, TX 76890 | Oil & Gas Operator | May 2018 |
| 45 | 4 P Oilfield Services, LLC | Pampa, TX 79065 | Oil & Gas Operator | May 2018 |
| 46 | 4-B | | Oil & Gas Operator | May 2009 |
| 47 | 4-J Oil Co. | Muldrow, OK 74948 | Oil & Gas Operator | Mar 2009 |
| 48 | 4-M Operating Company | | Oil & Gas Operator | Jun 2015 |
| 49 | 4-Sight Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2006 |
| 50 | 4-Sight Operating Company II | | Oil & Gas Operator | Feb 2000 |
| 51 | 4-Sight Operating Company, LTD. | Kilgore, TX 75663-639 | Oil & Gas Operator | May 2018 |
| 52 | 4D Energy Co. | | Oil & Gas Operator | Feb 2007 |
| 53 | 4F Energy, LLC | Luling, TX 78648 | Oil Operator | Dec 2017 |
| 54 | 4J Oil Co. LLC | Ryan, OK 73565 | Oil Operator | May 2018 |
| 55 | 4P Energy Texas, LLC | Denver, CO 80206 | Oil & Gas Operator | May 2018 |
| 56 | 5 G Resources, LLC | Wichita Falls, TX 76308-9531 | Oil & Gas Operator | May 2018 |
| 57 | 5 Schkade | Albany, TX 76430 | Oil Operator | May 2018 |
| 58 | 5-N Energy | | Oil & Gas Operator | Aug 2011 |
| 59 | 5H Oil Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 60 | 5L Properties | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2002 |
| 61 | 5L Properties, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2018 |
| 62 | 5R Oil Company | | Oil & Gas Operator | May 2018 |
| 63 | 6 Hess, LLC | Muenster, TX 76252 | Oil Operator | May 2018 |
| 64 | 7 D Operations | Brownwood, TX 76801 | Oil & Gas Operator | May 2018 |
| 65 | 77 Oil Properties, Inc. | Austin, TX 78726 | Gas Operator | Mar 2002 |
| 66 | 7711 Corporation, The | Houston, TX 77002 | Oil & Gas Operator | May 2018 |
| 67 | 7S Oil & Gas, LLC | Midland, TX 79706 | Oil & Gas Operator | May 2018 |
| 68 | 86-Oil & Gas | | Oil & Gas Operator | Oct 2003 |
| 69 | 9K Investments LLC | Cisco, TX 76437 | Oil & Gas Operator | May 2018 |
| 70 | A & B Minerals | Scotland, TX 76379 | Oil & Gas Operator | May 2018 |
| 71 | A & B Oil | Monahans, TX 79756 | Oil & Gas Operator | May 2018 |
| 72 | A & B Oil Company | Monahans, TX | Oil & Gas Operator | Apr 2015 |
| 73 | A & B Well Service Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Nov 2006 |
| 74 | A & C Oil Company, LLC | Stockdale, TX 78160 | Oil Operator | May 2018 |
| 75 | A & D Exploration Company | Rockport, TX 78381 | Oil & Gas Operator | May 2018 |
| 76 | A & E Minerals, LLC | Shreveport, LA 71104 | Oil Operator | May 2018 |
| 77 | A & G Oil Company, LLC | | Oil & Gas Operator | Feb 2012 |
| 78 | A & M Partnership | Erie, PA 16506-2944 | Oil & Gas Operator | Dec 2017 |
| 79 | A & P Oil & Gas | Leona, TX 75850-57 | Oil Operator | May 2018 |
| 80 | A A Production Inc. | | Oil & Gas Operator | Mar 1998 |
| 81 | A C Operating Co. | | Oil & Gas Operator | Mar 2008 |
| 82 | A D D Productions | Sweetwater, TX 79556 | Oil & Gas Operator | May 2018 |
| 83 | A E G Oil, Inc. | | Oil & Gas Operator | May 2018 |
| 84 | A J A Companies | | Oil Operator | May 2018 |
| 85 | A T M Corporation | | Oil & Gas Operator | Oct 2002 |
| 86 | A-E Operating Committee | | Oil & Gas Operator | Dec 1996 |
| 87 | A-G-B, Inc. | | Oil & Gas Operator | Aug 2003 |
| 88 | A. N. Mac Diarmid Co. | San Antonio, TX 78212-468 | Oil Operator | May 2018 |
| 89 | A. P. B. Petro | | Oil & Gas Operator | Oct 2005 |
| 90 | A.A.F. Production Co., Inc. | | Oil & Gas Operator | Dec 1997 |
| 91 | A.C.T. Operating Company | Lubbock, TX 79401 | Oil & Gas Operator | May 2018 |
| 92 | A.D. Operating | Graham, TX 76450-4810 | Oil Operator | May 2018 |
| 93 | A.D.A. Oil Co | Houston, TX | Oil Operator | Aug 2003 |
| 94 | A.D.S. Resources, Inc. | | Oil & Gas Operator | Jul 2008 |
| 95 | A.E.N. Energy, Inc. | | Oil & Gas Operator | Jan 1996 |
| 96 | A.O.E. Operators, Inc. | Fulshear, TX 77441-550 | Oil & Gas Operator | May 2018 |
| 97 | A2r Resources, LLC | Pampa, TX 79065 | Oil & Gas Operator | May 2018 |
| 98 | Aaa Oil Company | Castroville, TX 78009 | Oil & Gas Operator | May 2018 |
| 99 | Aardolie Oil Company | | Oil & Gas Operator | Jul 2003 |
| 100 | Aaron & Jeter | | Oil & Gas Operator | Jan 2003 |