COUNTIES · MCMULLEN · OPERATORS
McMullen County Operators
Every operator with a permit on file or a well of record here, ranked by permits issued in the window. Wells are each operator's current inventory in the county from the RRC wellbore file.
| # | Operator | Permits | All time | Horizontal | Wells | First | Last |
|---|---|---|---|---|---|---|---|
| 1 | Chesapeake Operating, Inc. | 682 | 682 | 557 | 9 | Jan 27, 2010 | Oct 27, 2014 |
| 2 | EOG Resources, Inc. | 552 | 552 | 549 | 386 | Sep 16, 2009 | Jul 2, 2026 |
| 3 | Swift Energy Company | 493 | 493 | 0 | 54 | Jun 28, 1989 | Dec 7, 2005 |
| 4 | Murphy Expl. & Prod. Co. - USA | 418 | 418 | 411 | 257 | Oct 7, 2010 | Feb 4, 2025 |
| 5 | Swift Energy Operating, LLC | 346 | 346 | 234 | 45 | Jan 10, 2006 | Apr 26, 2017 |
| 6 | Chesapeake Operating, L.L.C. | 274 | 274 | 274 | 124 | Jan 27, 2010 | May 11, 2023 |
| 7 | Comstock Oil & Gas, LP | 251 | 251 | 251 | 1 | Jul 21, 2010 | Jul 9, 2014 |
| 8 | BPX Operating Company | 215 | 215 | 215 | 264 | Oct 2, 2012 | Jan 30, 2026 |
| 9 | Petrohawk Operating Company | 206 | 206 | 205 | 0 | Nov 22, 2008 | Jul 5, 2013 |
| 10 | Talisman Energy USA Inc. | 189 | 189 | 189 | 4 | Jul 22, 2010 | Jul 22, 2015 |
| 11 | Iec Corp. | 169 | 169 | 0 | 0 | Apr 28, 1978 | Feb 12, 1979 |
| 12 | Sea Eagle Ford, LLC | 130 | 130 | 129 | 0 | May 12, 2011 | Jan 29, 2020 |
| 13 | Texaco Inc. | 126 | 126 | 0 | 29 | Oct 14, 1977 | Nov 28, 1990 |
| 14 | BHP Billiton Pet(txla OP) Co | 122 | 122 | 121 | 4 | Jul 22, 2011 | Jun 21, 2019 |
| 15 | McFadden Oil Corporation | 109 | 109 | 0 | 0 | Nov 7, 1978 | Mar 10, 1982 |
| 16 | Royal Oil & Gas Corp. | 108 | 108 | 0 | 3 | Dec 11, 1979 | Jul 9, 1990 |
| 17 | Welhausen Operating Company, LP | 90 | 90 | 0 | 24 | Jun 27, 2002 | Feb 5, 2014 |
| 18 | Burlington Resources O & G Co LP | 88 | 88 | 85 | 45 | Jan 23, 2012 | Jul 20, 2026 |
| 19 | Tana Oil & Gas Corp. | 83 | 83 | 0 | 2 | Sep 14, 1981 | Sep 15, 1989 |
| 20 | Gulftex Energy, LLC | 78 | 78 | 74 | 72 | May 16, 2007 | Sep 16, 2026 |
| 21 | Arco Oil & Gas Co. | 73 | 73 | 0 | 19 | Sep 1, 1977 | Feb 9, 1994 |
| 22 | Verdun Oil & Gas LLC | 72 | 72 | 72 | 69 | Apr 5, 2018 | Oct 14, 2026 |
| 23 | American Exploration Company | 70 | 70 | 0 | 1 | Dec 17, 1985 | Apr 21, 1997 |
| 24 | Blackbrush O & G, LLC | 69 | 69 | 69 | 2 | Jun 8, 2012 | May 26, 2023 |
| 25 | Silverbow Resources Oper, LLC | 62 | 62 | 62 | 96 | Sep 8, 2014 | Nov 25, 2025 |
| 26 | Carrizo (Eagle Ford) LLC | 62 | 62 | 62 | 1 | Oct 18, 2013 | Oct 23, 2019 |
| 27 | Marathon Oil EF LLC | 61 | 61 | 61 | 37 | Apr 11, 2012 | Jan 28, 2019 |
| 28 | Manti Operating Company | 56 | 56 | 0 | 4 | Aug 18, 2003 | Sep 5, 2008 |
| 29 | Hanson Minerals Co. | 54 | 54 | 0 | 4 | Jul 23, 1979 | Jul 20, 1993 |
| 30 | Burnett Oil Co., Inc. | 54 | 54 | 0 | 0 | Dec 29, 1980 | Dec 31, 1984 |
| 31 | Exxon Corp. | 53 | 53 | 0 | 30 | Jul 21, 1977 | Mar 11, 1996 |
| 32 | Portal Drilling Company | 52 | 52 | 0 | 1 | Dec 13, 1984 | Jun 30, 1989 |
| 33 | Rosewood Resources, Inc. | 43 | 43 | 43 | 36 | Nov 26, 2018 | Oct 16, 2024 |
| 34 | Kimmeridge Texas Gas, LLC | 42 | 42 | 41 | 0 | Mar 1, 2023 | Aug 18, 2025 |
| 35 | Century Resources, Inc. | 40 | 40 | 0 | 2 | Feb 27, 2003 | Oct 15, 2008 |
| 36 | Shell Oil Company | 40 | 40 | 0 | 1 | Jun 24, 1977 | Dec 30, 1983 |
| 37 | Camden Resources, Inc. | 37 | 37 | 0 | 3 | May 30, 2002 | May 21, 2007 |
| 38 | XTO Energy Inc. | 35 | 35 | 35 | 163 | Feb 8, 2010 | Jun 11, 2018 |
| 39 | American Cometra, Inc. | 35 | 35 | 0 | 1 | Mar 2, 1988 | Dec 2, 1991 |
| 40 | Shell Western E&P Inc. | 35 | 35 | 0 | 0 | Apr 26, 1983 | Nov 12, 1987 |
| 41 | Enerquest Operating L.L.C. | 34 | 34 | 0 | 15 | Apr 10, 2007 | Mar 5, 2019 |
| 42 | Hurd Enterprises, Ltd. | 33 | 33 | 0 | 8 | Apr 23, 1996 | Jan 12, 2021 |
| 43 | Hunt Oil Company | 33 | 33 | 33 | 0 | Jul 22, 2011 | Jan 20, 2015 |
| 44 | Petrolero Corp. | 31 | 31 | 0 | 10 | Sep 5, 1978 | Mar 25, 1988 |
| 45 | Anaconda Co., The | 31 | 31 | 0 | 0 | Jan 10, 1980 | Jan 10, 1980 |
| 46 | Welhausen Company, The | 31 | 31 | 0 | 0 | Sep 9, 1983 | Nov 17, 1988 |
| 47 | Aurora Resources Corporation | 30 | 30 | 9 | 9 | Dec 20, 2005 | May 22, 2019 |
| 48 | Callon (Eagle Ford) LLC | 30 | 30 | 30 | 0 | Oct 23, 2019 | May 26, 2023 |
| 49 | Thorne, James R. | 30 | 30 | 0 | 0 | Jul 25, 1983 | Jul 31, 1984 |
| 50 | Hawn Brothers Company | 29 | 29 | 0 | 7 | Apr 14, 1987 | Feb 21, 1997 |
| 51 | Little Oil & Gas, Inc. | 29 | 29 | 0 | 0 | Jun 7, 1984 | Jul 7, 1986 |
| 52 | Hughes, Dan A. Company | 28 | 28 | 0 | 1 | Mar 1, 1995 | May 14, 1998 |
| 53 | Sanchez Oil & Gas Corporation | 28 | 28 | 28 | 0 | Nov 18, 2013 | May 27, 2014 |
| 54 | Abraxas Petroleum Corporation | 27 | 27 | 26 | 0 | Dec 29, 1987 | Oct 22, 2014 |
| 55 | Whitehead Oil Co. | 25 | 25 | 0 | 23 | Nov 20, 1979 | Jul 14, 1993 |
| 56 | Rutherford Oil Corporation | 25 | 25 | 0 | 13 | Aug 24, 1983 | Nov 1, 2016 |
| 57 | U.S. Enercorp, Ltd. | 25 | 25 | 0 | 8 | Jul 15, 2004 | Sep 2, 2009 |
| 58 | Lindholm Oil, Inc. | 25 | 25 | 0 | 4 | Aug 22, 1990 | Dec 31, 2001 |
| 59 | Mobil Oil Corporation | 25 | 25 | 0 | 0 | Feb 28, 1978 | May 5, 1982 |
| 60 | Texaco E & P Inc. | 24 | 24 | 0 | 47 | Aug 27, 1992 | May 22, 2001 |
| 61 | Sutton Producing Corp. | 24 | 24 | 0 | 9 | Feb 20, 1980 | Aug 31, 2017 |
| 62 | Carrizo Oil & Gas, Inc. | 24 | 24 | 21 | 0 | Mar 23, 1999 | Sep 6, 2011 |
| 63 | Cheyenne Petroleum Company | 24 | 24 | 24 | 0 | Mar 1, 2013 | May 11, 2022 |
| 64 | Lagerquist, Walter G., Jr. | 23 | 23 | 0 | 45 | Nov 16, 1977 | Nov 17, 1989 |
| 65 | Ineos USA Oil & Gas LLC | 22 | 22 | 22 | 474 | Jun 10, 2022 | Dec 16, 2025 |
| 66 | Hawn Bros-Chapman Oil-la Fete | 22 | 22 | 0 | 0 | Dec 30, 1982 | Apr 10, 1986 |
| 67 | Castlerock EF Operating LLC | 21 | 21 | 21 | 32 | Apr 28, 2014 | Sep 25, 2024 |
| 68 | Hawthorn Energy Partners, LLC | 21 | 21 | 0 | 19 | Jun 20, 2002 | May 8, 2006 |
| 69 | Dale Operating Company | 21 | 21 | 0 | 10 | Sep 3, 1987 | Apr 14, 1993 |
| 70 | Delray Oil, Inc. | 21 | 21 | 0 | 4 | Sep 27, 1983 | Jul 17, 1998 |
| 71 | Repsol Oil & Gas USA, LLC | 20 | 20 | 20 | 138 | Feb 7, 2022 | Sep 21, 2026 |
| 72 | Mobil Producing TX. & N.M. Inc. | 20 | 20 | 0 | 2 | May 12, 1980 | Oct 24, 1990 |
| 73 | Wapiti Operating, LLC | 19 | 19 | 0 | 6 | Feb 15, 2013 | Oct 28, 2014 |
| 74 | Welhausen Operating Co., Inc. | 19 | 19 | 0 | 5 | Jan 15, 1990 | Mar 21, 2001 |
| 75 | Escondido Resources II, LLC | 18 | 18 | 10 | 4 | Feb 27, 2008 | Dec 13, 2013 |
| 76 | Terlingua Operating, LLC | 18 | 18 | 0 | 2 | May 11, 2017 | Aug 8, 2017 |
| 77 | Hilty Interests, Inc. | 18 | 18 | 0 | 1 | Nov 3, 1983 | Dec 15, 1986 |
| 78 | Moran, T. B. | 18 | 18 | 0 | 0 | Oct 13, 1977 | Sep 25, 1984 |
| 79 | Pintex Operating Inc. | 18 | 18 | 0 | 0 | Dec 20, 1982 | Apr 16, 1997 |
| 80 | Brammer Engineering, Inc. | 17 | 17 | 0 | 1 | Jun 18, 1982 | Jul 29, 1991 |
| 81 | Laborde Production Co. | 17 | 17 | 0 | 0 | Jul 11, 1984 | Jun 16, 1988 |
| 82 | Zink, Edman R. & Assoc., Inc. | 17 | 17 | 0 | 0 | Feb 28, 1978 | Jul 6, 1983 |
| 83 | Bass Enterprises Production Co. | 16 | 16 | 0 | 11 | Nov 20, 1985 | Feb 27, 2001 |
| 84 | Whiting Oil and Gas Corporation | 16 | 16 | 0 | 7 | Apr 1, 2004 | Nov 28, 2012 |
| 85 | Vastar Resources, Inc. | 16 | 16 | 0 | 4 | Mar 24, 1994 | Aug 8, 2001 |
| 86 | Awp Operating Company | 15 | 15 | 6 | 64 | Mar 26, 1993 | Mar 5, 2021 |
| 87 | Kaler Energy Corp. | 15 | 15 | 0 | 12 | Oct 4, 2001 | Jun 1, 2026 |
| 88 | BP America Production Company | 15 | 15 | 3 | 7 | May 29, 2002 | Dec 7, 2015 |
| 89 | Skinner Corp-Newman Bros.drlg.co | 15 | 15 | 0 | 4 | Sep 8, 1977 | Apr 25, 1980 |
| 90 | Chanoco Corporation | 15 | 15 | 0 | 3 | Dec 7, 1982 | Dec 5, 1985 |
| 91 | Lakewood Operating, Ltd. | 15 | 15 | 0 | 1 | Feb 4, 1993 | May 24, 1996 |
| 92 | TXO Production Corp. | 15 | 15 | 0 | 1 | Feb 16, 1982 | Aug 20, 1985 |
| 93 | Mesquite Land & Minerals, Inc. | 15 | 15 | 0 | 0 | Mar 24, 1980 | Aug 20, 1980 |
| 94 | Crescent Energy Operating, LLC | 14 | 14 | 14 | 182 | Oct 27, 2025 | Oct 30, 2026 |
| 95 | Cabot Oil & Gas Corporation | 14 | 14 | 0 | 3 | Feb 12, 1996 | Dec 9, 1998 |
| 96 | Ncey Holdings, LLC | 14 | 14 | 0 | 2 | Apr 26, 2008 | Mar 3, 2010 |
| 97 | CD Resources Company | 14 | 14 | 0 | 1 | Sep 25, 1985 | Jun 13, 1996 |
| 98 | Stinger Oil & Gas Inc. | 14 | 14 | 0 | 1 | Aug 2, 1990 | Jan 11, 1996 |
| 99 | Texas Eastern Transmission, LP | 14 | 14 | 0 | 0 | Nov 19, 2007 | Mar 15, 2022 |
| 100 | Parker & Parsley Producing L.P. | 13 | 13 | 0 | 2 | Apr 4, 1995 | Oct 2, 1997 |
| 101 | Aop Operating Corporation | 13 | 13 | 0 | 1 | Jul 16, 1987 | Apr 16, 1997 |
| 102 | Continental Oil Company | 13 | 13 | 0 | 1 | Jun 30, 1977 | Mar 22, 1978 |
| 103 | Douglas Petroleum, Inc. | 13 | 13 | 0 | 1 | Aug 17, 1979 | Mar 21, 1983 |
| 104 | Harmony Drilling Company, Inc. | 13 | 13 | 0 | 0 | Aug 4, 1981 | Oct 18, 1993 |
| 105 | Layline Petroleum I, LLC | 13 | 13 | 0 | 0 | Mar 28, 2012 | May 2, 2013 |
| 106 | SN Operating, LLC | 13 | 13 | 13 | 0 | Apr 26, 2014 | Jan 30, 2015 |
| 107 | Stephenson, Light | 13 | 13 | 0 | 0 | Apr 30, 1981 | Dec 30, 1996 |
| 108 | San Isidro Development Co, L. C. | 12 | 12 | 8 | 9 | Sep 9, 2004 | Dec 31, 2018 |
| 109 | Sun Expl. & Prod. Co.-Corpus | 12 | 12 | 0 | 5 | Oct 11, 1979 | Oct 22, 1986 |
| 110 | Fina Oil & Chemical Company | 12 | 12 | 0 | 4 | Aug 2, 1985 | Nov 12, 1991 |
| 111 | Goldston Oil Corp. | 12 | 12 | 0 | 4 | Aug 17, 1977 | Apr 1, 1992 |
| 112 | McLain Exploration, Inc. | 12 | 12 | 0 | 3 | Jun 23, 1992 | Aug 4, 1994 |
| 113 | Hancock Oil Company | 12 | 12 | 0 | 0 | Mar 27, 1981 | Aug 10, 1983 |
| 114 | High Sierra Operating, Ltd. | 12 | 12 | 0 | 0 | Dec 30, 1992 | Sep 27, 1993 |
| 115 | Southern Energy & Exploration Co | 12 | 12 | 0 | 0 | Jan 30, 1985 | Oct 30, 1985 |
| 116 | Loma Oil Company | 11 | 11 | 0 | 89 | Apr 27, 1978 | Oct 1, 2003 |
| 117 | Chevron U. S. A. Inc. | 11 | 11 | 0 | 3 | Feb 24, 1978 | Aug 10, 2011 |
| 118 | Delta Exploration Company, Inc. | 11 | 11 | 1 | 2 | Feb 24, 2005 | Sep 11, 2008 |
| 119 | Maverick Energy & Dev. Corp. | 11 | 11 | 0 | 2 | Aug 6, 1999 | Jun 29, 2001 |
| 120 | Brush Country Energy, L.L.C. | 11 | 11 | 0 | 1 | Feb 24, 1993 | Jun 26, 1997 |
| 121 | Tidal Petroleum, Inc. | 11 | 11 | 10 | 1 | Sep 16, 2003 | Sep 5, 2025 |
| 122 | Blackbrush O & G, Inc. | 11 | 11 | 2 | 0 | Feb 23, 2005 | May 16, 2012 |
| 123 | Chapman Oil | 11 | 11 | 0 | 0 | Dec 31, 1980 | Dec 3, 1984 |
| 124 | Gruy Petroleum Management Co. | 11 | 11 | 0 | 0 | Apr 16, 2002 | Dec 9, 2005 |
| 125 | Caturus Energy, LLC | 10 | 10 | 10 | 74 | Aug 18, 2025 | Jul 20, 2026 |
| 126 | Bluestone Natural Res. II, LLC | 10 | 10 | 0 | 3 | Oct 21, 2013 | Jan 25, 2016 |
| 127 | Bridge Oil Company, L. P. | 10 | 10 | 0 | 2 | Oct 1, 1991 | Jul 15, 1994 |
| 128 | Dekalb Energy Company | 10 | 10 | 0 | 2 | Oct 17, 1990 | May 22, 1992 |
| 129 | Inland Ocean, Inc. | 10 | 10 | 0 | 1 | Apr 9, 1980 | Dec 2, 1993 |
| 130 | Texoz E&P I, Inc. | 10 | 10 | 9 | 1 | May 4, 2012 | May 13, 2013 |
| 131 | Doc Petroleum Inc. | 10 | 10 | 0 | 0 | Feb 1, 1989 | Jul 14, 1989 |
| 132 | U.S. Enercorp, LLC | 10 | 10 | 0 | 0 | Aug 23, 2000 | Apr 1, 2004 |
| 133 | Wynn-Crosby Operating, Ltd. | 9 | 9 | 0 | 14 | May 10, 2011 | Oct 13, 2015 |
| 134 | Silver Hill Energy Operating LLC | 9 | 9 | 9 | 4 | Sep 23, 2026 | Sep 30, 2026 |
| 135 | Miller, W. C. | 9 | 9 | 0 | 3 | Feb 12, 1981 | Jan 6, 1986 |
| 136 | Miller, W. C. Operating Company | 9 | 9 | 0 | 1 | Nov 9, 1987 | Oct 5, 1994 |
| 137 | Sierra Resources, LLC | 9 | 9 | 7 | 1 | Mar 11, 2016 | Sep 13, 2019 |
| 138 | Walter Oil & Gas Corporation | 9 | 9 | 0 | 1 | Jan 13, 1982 | Apr 9, 1984 |
| 139 | Statoil Texas Onshore Prop LLC | 9 | 9 | 9 | 0 | Jun 12, 2013 | Oct 21, 2016 |
| 140 | Trinity Operating (Usg), LLC | 8 | 8 | 8 | 141 | Jan 14, 2019 | Jan 16, 2019 |
| 141 | Acock Engineering & Operating Co | 8 | 8 | 0 | 1 | Aug 18, 1983 | May 18, 1990 |
| 142 | Broad Oak Energy, Inc. | 8 | 8 | 3 | 1 | Jan 30, 2007 | Feb 6, 2009 |
| 143 | Dolch Production, Inc. | 8 | 8 | 0 | 1 | Oct 31, 1984 | Jan 8, 1991 |
| 144 | Ellsworth, H. P. O&G Properties | 8 | 8 | 0 | 1 | Jul 24, 1989 | Mar 31, 2011 |
| 145 | General American Properties, Ltd | 8 | 8 | 0 | 0 | Feb 10, 1981 | Jul 2, 1981 |
| 146 | Jamex, Inc. | 8 | 8 | 0 | 0 | Jun 20, 2002 | Aug 25, 2010 |
| 147 | Pentad Development Corp. (A) | 8 | 8 | 0 | 0 | Oct 29, 1985 | Feb 3, 1986 |
| 148 | SV Energy Company, LLC | 8 | 8 | 0 | 0 | Jun 8, 2011 | Feb 12, 2015 |
| 149 | Southern Oil & Gas LLC | 7 | 7 | 0 | 9 | Jul 13, 2020 | May 13, 2021 |
| 150 | Antares Oil Corporation | 7 | 7 | 0 | 4 | Jun 24, 1977 | Jul 17, 1981 |
| 151 | Kebo Oil & Gas, Inc. | 7 | 7 | 0 | 4 | Nov 16, 1988 | Oct 15, 2004 |
| 152 | Texas Eastern Transmission Corp. | 7 | 7 | 0 | 3 | Feb 12, 1992 | May 29, 1998 |
| 153 | Cannan, Morris | 7 | 7 | 0 | 2 | Nov 10, 1980 | Nov 15, 1989 |
| 154 | Kilroy Company of Texas, Inc. | 7 | 7 | 0 | 2 | Nov 18, 1977 | Apr 19, 1990 |
| 155 | Warrior Management Co. | 7 | 7 | 0 | 2 | Nov 17, 1980 | Apr 13, 1987 |
| 156 | Dreyfus, Louis Natural Gas Corp | 7 | 7 | 0 | 1 | Dec 16, 1992 | Oct 31, 1997 |
| 157 | Wainoco Oil & Gas Company | 7 | 7 | 0 | 1 | Aug 24, 1978 | Jun 9, 1982 |
| 158 | Alcor Energy, Inc. | 7 | 7 | 0 | 0 | Dec 27, 1994 | Mar 31, 1997 |
| 159 | Ceniza Petroleum, Inc. | 7 | 7 | 0 | 0 | Jul 26, 1995 | Aug 14, 2001 |
| 160 | Costilla Energy, Inc. | 7 | 7 | 0 | 0 | Feb 4, 1997 | Jun 16, 1997 |
| 161 | EP Energy E&P Company, LLC | 7 | 7 | 7 | 0 | May 20, 2022 | Dec 20, 2023 |
| 162 | Foster, Dan R. | 7 | 7 | 0 | 0 | Jul 15, 1980 | Nov 10, 1986 |
| 163 | Holden-Brooke Oil & Gas Co. | 7 | 7 | 0 | 0 | Jun 7, 1993 | Jan 22, 1997 |
| 164 | J&G Oil & Gas | 7 | 7 | 0 | 0 | Jul 10, 2001 | Aug 24, 2001 |
| 165 | Newgulf Petroleum, LLC | 7 | 7 | 0 | 0 | Sep 18, 2007 | Dec 10, 2009 |
| 166 | Omega Energy Corp. | 7 | 7 | 0 | 0 | Apr 25, 2005 | Sep 14, 2007 |
| 167 | Ridgemar Energy Operating, LLC | 7 | 7 | 7 | 0 | May 26, 2023 | Apr 5, 2024 |
| 168 | Rincon Petroleum Corporation | 7 | 7 | 0 | 0 | Oct 1, 1984 | Sep 16, 2003 |
| 169 | Atlantic Richfield Co. | 6 | 6 | 0 | 19 | Sep 1, 1977 | Mar 27, 1979 |
| 170 | Orca Operating Company, LLC | 6 | 6 | 0 | 5 | Jan 18, 2014 | Jul 17, 2014 |
| 171 | Texas Secondary Oil Corporation | 6 | 6 | 0 | 3 | Mar 25, 2008 | May 17, 2013 |
| 172 | Drillers Energy Search, Inc | 6 | 6 | 0 | 2 | Jan 16, 1979 | Dec 13, 1984 |
| 173 | Enduro Oil Company Inc. | 6 | 6 | 0 | 1 | Mar 23, 1983 | Feb 29, 1988 |
| 174 | Modern Exploration, Inc. | 6 | 6 | 0 | 1 | Oct 4, 1999 | Feb 13, 2025 |
| 175 | Newman Brothers Drilling Company | 6 | 6 | 0 | 1 | Apr 12, 1984 | Sep 3, 1987 |
| 176 | Orion Resources, Inc. | 6 | 6 | 0 | 1 | May 11, 1994 | Feb 16, 1995 |
| 177 | Texas Oil & Gas Corp. | 6 | 6 | 0 | 1 | Aug 8, 1977 | Jul 14, 1980 |
| 178 | Amax Petroleum Corporation | 6 | 6 | 0 | 0 | Jan 22, 1985 | May 28, 1985 |
| 179 | Pmo | 6 | 6 | 0 | 0 | Apr 3, 1995 | May 17, 1996 |
| 180 | Regency Field Services LLC | 6 | 6 | 0 | 0 | Sep 23, 2011 | Nov 6, 2012 |
| 181 | Rexcom, Inc. | 6 | 6 | 0 | 0 | Apr 15, 1998 | Jun 24, 1999 |
| 182 | Sanchez-O'Brien Oil & Gas Corp. | 6 | 6 | 0 | 0 | Sep 18, 1981 | Sep 22, 1994 |
| 183 | Texaco TPC Inc. | 6 | 6 | 0 | 0 | Sep 15, 1989 | Sep 12, 1991 |
| 184 | Williams, Clayton W., Jr. | 6 | 6 | 0 | 0 | Dec 31, 1984 | May 12, 1987 |
| 185 | Paisano Minerals Company | 5 | 5 | 0 | 73 | Aug 30, 1982 | Oct 6, 1986 |
| 186 | Spiller, Robert S. | 5 | 5 | 0 | 3 | Dec 30, 1987 | Jul 26, 1989 |
| 187 | Hollimon Oil Corporation | 5 | 5 | 0 | 2 | Aug 23, 2000 | Sep 7, 2000 |
| 188 | Padon, Frank B. Oil Oper., Inc. | 5 | 5 | 0 | 2 | May 10, 1993 | May 22, 1996 |
| 189 | Sklar Exploration Company LLC | 5 | 5 | 0 | 2 | Aug 27, 2004 | Jun 30, 2009 |
| 190 | Tucker Petroleum, Inc. | 5 | 5 | 0 | 2 | May 18, 1984 | Aug 22, 1984 |
| 191 | Valence Operating Company | 5 | 5 | 5 | 2 | Apr 11, 2012 | Feb 26, 2025 |
| 192 | Alamo Operating Company, L. C. | 5 | 5 | 0 | 1 | Aug 10, 2005 | Mar 15, 2006 |
| 193 | Mormac Oil & Gas Co. | 5 | 5 | 0 | 1 | Nov 16, 1977 | Sep 26, 1980 |
| 194 | Rio Exploration Company | 5 | 5 | 0 | 1 | Jan 15, 1991 | Oct 30, 2000 |
| 195 | Sohio Petroleum Co. | 5 | 5 | 0 | 1 | Nov 28, 1983 | Oct 24, 1984 |
| 196 | Whitesands Operating, L.L.C. | 5 | 5 | 0 | 1 | Jul 27, 2005 | Dec 1, 2010 |
| 197 | Anschutz Exploration Corporation | 5 | 5 | 0 | 0 | May 15, 1995 | May 19, 1995 |
| 198 | Cimarron Engineering Corp. | 5 | 5 | 0 | 0 | Sep 30, 1994 | Feb 18, 2005 |
| 199 | Cotton, W. L. | 5 | 5 | 0 | 0 | Mar 17, 1981 | Feb 9, 1988 |
| 200 | Cude, James W. Oil | 5 | 5 | 0 | 0 | Sep 24, 1980 | Aug 21, 1981 |
| 201 | Enterprise Products Operatingllc | 5 | 5 | 0 | 0 | May 5, 2008 | Jul 18, 2023 |
| 202 | Enterprise Products Operating LP | 5 | 5 | 0 | 0 | Aug 5, 2005 | May 8, 2007 |
| 203 | EP Energy E&P Company, L.P. | 5 | 5 | 5 | 0 | Aug 17, 2018 | Nov 15, 2018 |
| 204 | Gierhart Exploration, Inc. | 5 | 5 | 1 | 0 | Sep 29, 1988 | Dec 23, 1999 |
| 205 | Harvey Brothers Oil & Gas | 5 | 5 | 0 | 0 | Sep 29, 1993 | Sep 29, 1993 |
| 206 | Lagerquist, Glenn H. | 5 | 5 | 0 | 0 | Oct 1, 1980 | Jun 2, 1981 |
| 207 | Quintanilla, Leo | 5 | 5 | 0 | 0 | Jun 11, 1979 | Mar 25, 1980 |
| 208 | Sundance Resources, Inc. | 5 | 5 | 0 | 0 | Jun 7, 1990 | Aug 21, 1991 |
| 209 | Tri-C Resources, Inc. | 5 | 5 | 0 | 0 | Sep 29, 1989 | Mar 10, 1995 |
| 210 | West, Thomas S., Jr. | 5 | 5 | 0 | 0 | Jan 11, 1980 | Nov 1, 1985 |
| 211 | Yucca Oil Company | 5 | 5 | 0 | 0 | Feb 10, 1987 | Jun 4, 1991 |
| 212 | Simray Operating Corp. | 4 | 4 | 1 | 27 | Jan 9, 2004 | Sep 5, 2008 |
| 213 | Wagner Oil Company | 4 | 4 | 0 | 18 | Apr 18, 2000 | Mar 30, 2007 |
| 214 | Field Petroleum Corp. | 4 | 4 | 0 | 7 | Apr 25, 2019 | Jul 18, 2024 |
| 215 | Republic Resources, LLC. | 4 | 4 | 0 | 5 | Aug 3, 2000 | Jun 8, 2011 |
| 216 | Stout Consulting Services, Inc. | 4 | 4 | 0 | 3 | May 27, 1983 | Mar 23, 1987 |
| 217 | Texcal Energy (GP) LLC | 4 | 4 | 0 | 3 | Feb 15, 2007 | Oct 29, 2007 |
| 218 | Camden Resources, LLC | 4 | 4 | 0 | 2 | Oct 28, 2008 | Jun 16, 2010 |
| 219 | Trek Resources, Inc. | 4 | 4 | 0 | 2 | Mar 23, 2005 | Jul 23, 2012 |
| 220 | Baxter, Murphy H. | 4 | 4 | 0 | 1 | Nov 13, 1981 | Sep 19, 1989 |
| 221 | Caskids Operating Company | 4 | 4 | 2 | 1 | Jul 22, 2010 | Nov 24, 2010 |
| 222 | Cox, Edwin L. | 4 | 4 | 0 | 1 | Jun 15, 1977 | Dec 27, 1979 |
| 223 | DKD Joint Venture | 4 | 4 | 0 | 1 | Jan 25, 1980 | Jul 25, 1980 |
| 224 | Overly Operating Co. | 4 | 4 | 0 | 1 | Dec 18, 1979 | Nov 25, 1980 |
| 225 | Paragon Resources, Inc. | 4 | 4 | 0 | 1 | Apr 18, 1980 | Feb 22, 1984 |
| 226 | Petrus Operating Co., Inc. | 4 | 4 | 0 | 1 | Feb 28, 1978 | Apr 30, 1981 |
| 227 | Royal Production Company, Inc. | 4 | 4 | 0 | 1 | Feb 16, 2005 | Mar 20, 2026 |
| 228 | Tenneco Oil Co. | 4 | 4 | 0 | 1 | Aug 8, 1983 | Feb 26, 1986 |
| 229 | Union Gas Operating Company | 4 | 4 | 3 | 1 | Dec 3, 2009 | Apr 21, 2010 |
| 230 | Action Energy, LLC | 4 | 4 | 4 | 0 | May 16, 2019 | May 16, 2019 |
| 231 | Clear Water Oil & Gas Corp. | 4 | 4 | 0 | 0 | Oct 12, 1984 | Oct 22, 1984 |
| 232 | Cude Petroleum, Inc. | 4 | 4 | 0 | 0 | Jan 6, 1986 | Aug 24, 1987 |
| 233 | Cummins & Walker Oil Co., Inc. | 4 | 4 | 0 | 0 | Aug 4, 1977 | Dec 31, 1992 |
| 234 | E. K. O. | 4 | 4 | 0 | 0 | Sep 16, 1987 | Nov 14, 1990 |
| 235 | Enduring Resources, LLC | 4 | 4 | 4 | 0 | Aug 11, 2010 | Aug 16, 2010 |
| 236 | Fargo Trading Co., Inc. | 4 | 4 | 0 | 0 | Apr 10, 1984 | Aug 21, 1985 |
| 237 | Goldking Prod. Co. | 4 | 4 | 0 | 0 | Jul 18, 1979 | Jul 14, 1980 |
| 238 | H-M Resource Management, Inc. | 4 | 4 | 0 | 0 | May 15, 1996 | Apr 26, 2005 |
| 239 | Jay-Dee Operating Company | 4 | 4 | 0 | 0 | Apr 14, 1978 | Sep 6, 1979 |
| 240 | Lightning Oil Co. | 4 | 4 | 0 | 0 | Oct 10, 1978 | Dec 6, 1978 |
| 241 | Mark IV Energy | 4 | 4 | 0 | 0 | Aug 12, 1981 | Jan 3, 1990 |
| 242 | Miramar Pet Inc&resources Invest | 4 | 4 | 0 | 0 | Jan 31, 1978 | May 31, 1979 |
| 243 | Mitchell Energy Corporation | 4 | 4 | 0 | 0 | Feb 23, 1999 | Mar 7, 2000 |
| 244 | Paloma Cattle Co. & Dolch O & G | 4 | 4 | 0 | 0 | Mar 28, 1983 | Jul 20, 1983 |
| 245 | Pel-Tex Oil Company | 4 | 4 | 0 | 0 | Apr 20, 1989 | Apr 20, 1989 |
| 246 | River Resources, Inc. | 4 | 4 | 0 | 0 | Sep 2, 1994 | Apr 24, 1996 |
| 247 | Ageron Energy, LLC | 3 | 3 | 3 | 7 | Feb 17, 2021 | Dec 8, 2021 |
| 248 | Sun Exploration & Production Co. | 3 | 3 | 0 | 7 | Jul 26, 1977 | Jan 18, 1989 |
| 249 | Carburante Exploration Co, Ltd. | 3 | 3 | 0 | 4 | Jun 12, 2019 | Dec 9, 2019 |
| 250 | Blair-Vreeland | 3 | 3 | 0 | 3 | Oct 5, 1977 | Oct 2, 1979 |
| 251 | Resaca Resources, L.L.C. | 3 | 3 | 0 | 3 | Aug 4, 2009 | Aug 21, 2009 |
| 252 | Hawkins, H. L., Jr. | 3 | 3 | 0 | 2 | Sep 3, 1985 | Mar 23, 1988 |
| 253 | Petroleum Equities Corp. | 3 | 3 | 0 | 2 | Dec 30, 1983 | May 29, 1984 |
| 254 | Tee Operating Co. | 3 | 3 | 0 | 2 | Apr 28, 1982 | Mar 20, 1986 |
| 255 | BKV Dcarbon Ventures, LLC | 3 | 3 | 0 | 1 | Feb 4, 2025 | Feb 4, 2025 |
| 256 | Carl, W. E. | 3 | 3 | 0 | 1 | Mar 27, 1981 | Sep 28, 1987 |
| 257 | Centura Incorporated | 3 | 3 | 0 | 1 | Nov 29, 1977 | Feb 21, 1980 |
| 258 | Hamman Oil & Refg. Co. | 3 | 3 | 0 | 1 | Jul 9, 1981 | Nov 18, 1982 |
| 259 | H. & J. Drilling Company | 3 | 3 | 0 | 1 | Dec 1, 1978 | Apr 25, 1979 |
| 260 | Hughes Texas Petroleum, Ltd. | 3 | 3 | 0 | 1 | May 13, 1986 | Sep 16, 1986 |
| 261 | J-A-H, Inc. | 3 | 3 | 0 | 1 | Nov 29, 1978 | Aug 18, 1980 |
| 262 | Tana Oil and Gas Corporation | 3 | 3 | 0 | 1 | May 20, 1993 | Nov 16, 1993 |
| 263 | Alco Drlg. Co. | 3 | 3 | 0 | 0 | Jan 23, 1989 | Mar 24, 1994 |
| 264 | B. D. K. Production Co., Inc. | 3 | 3 | 0 | 0 | Jul 26, 1977 | Sep 15, 1982 |
| 265 | Brown, S. E., Trustee | 3 | 3 | 0 | 0 | Apr 28, 1978 | Jan 15, 1985 |
| 266 | Clearly Petroleum, LLC | 3 | 3 | 0 | 0 | Oct 28, 2014 | Jul 14, 2015 |
| 267 | Cliffwood Production Co. | 3 | 3 | 0 | 0 | Apr 14, 1998 | Jul 27, 2000 |
| 268 | Common Resources L.L.C. | 3 | 3 | 3 | 0 | Aug 7, 2009 | Sep 14, 2009 |
| 269 | Corpus Bayside Investments, LLC | 3 | 3 | 0 | 0 | Nov 15, 2011 | Nov 15, 2011 |
| 270 | Energy Transfer Company | 3 | 3 | 0 | 0 | Jul 11, 2016 | Oct 25, 2016 |
| 271 | Esenjay Petroleum Corp. | 3 | 3 | 0 | 0 | Sep 27, 1983 | Nov 1, 1985 |
| 272 | Fisher-Webb, Inc. | 3 | 3 | 0 | 0 | Aug 19, 1982 | Jan 27, 1983 |
| 273 | Ford, Edmond J., Jr. | 3 | 3 | 0 | 0 | Apr 20, 1979 | Jul 10, 1979 |
| 274 | Hamilton, John M. | 3 | 3 | 0 | 0 | Nov 12, 1979 | Sep 23, 1980 |
| 275 | Harper Hefte, Inc. | 3 | 3 | 0 | 0 | May 21, 2008 | Nov 4, 2009 |
| 276 | Hoskins, L. R. & Sons, Inc. | 3 | 3 | 0 | 0 | Nov 27, 1985 | Jun 16, 1987 |
| 277 | Hughes & Hughes | 3 | 3 | 0 | 0 | Dec 28, 1982 | Dec 15, 1983 |
| 278 | Hughes Texas Petroleum | 3 | 3 | 0 | 0 | Apr 17, 1987 | Dec 4, 1987 |
| 279 | Hunter Petroleum Inc. | 3 | 3 | 0 | 0 | Oct 25, 1994 | Mar 13, 1996 |
| 280 | Johnson Exploration Corporation | 3 | 3 | 0 | 0 | Jul 24, 1985 | Mar 20, 1986 |
| 281 | Joyce & Hilty, Inc. | 3 | 3 | 0 | 0 | Dec 15, 1980 | Dec 21, 1981 |
| 282 | Lahoma Properties, Inc. | 3 | 3 | 0 | 0 | Dec 13, 1977 | May 22, 1978 |
| 283 | Layline Energy I LLC | 3 | 3 | 0 | 0 | Oct 17, 2013 | Oct 17, 2013 |
| 284 | Murphy Exploration & Prod. Co. | 3 | 3 | 3 | 0 | Jul 2, 2009 | Nov 16, 2010 |
| 285 | Oil & Gas Reserves, Inc. | 3 | 3 | 0 | 0 | Jul 9, 1987 | Apr 6, 1988 |
| 286 | Paloma Cattle Co.&dolch Prod.inc | 3 | 3 | 0 | 0 | Mar 27, 1984 | Jul 16, 1984 |
| 287 | Pioneer Exploration Company | 3 | 3 | 0 | 0 | Jul 3, 2000 | Jul 3, 2000 |
| 288 | Rock Resources, Inc. | 3 | 3 | 0 | 0 | Apr 10, 2003 | Mar 9, 2010 |
| 289 | San Patricio Corporation | 3 | 3 | 0 | 0 | Nov 17, 1981 | Jun 21, 1984 |
| 290 | South Texas Limited Partnership | 3 | 3 | 0 | 0 | Jun 17, 1993 | Jul 21, 1993 |
| 291 | Supron Energy Corp. | 3 | 3 | 0 | 0 | Aug 19, 1977 | Nov 9, 1977 |
| 292 | Texas Gas Exploration Corp. | 3 | 3 | 0 | 0 | Nov 5, 1984 | Jun 18, 1985 |
| 293 | Texas Independent Explor., Inc. | 3 | 3 | 0 | 0 | Feb 10, 1994 | Sep 16, 1999 |
| 294 | Texegy Operating Company LLC | 3 | 3 | 0 | 0 | Feb 12, 2015 | Aug 2, 2019 |
| 295 | Sparkman Energy, LLC | 2 | 2 | 1 | 29 | Aug 6, 2014 | Aug 6, 2014 |
| 296 | Columbus Energy, LLC | 2 | 2 | 0 | 14 | Apr 20, 2026 | Jun 29, 2026 |
| 297 | Simray Oil & Gas, Inc. | 2 | 2 | 0 | 11 | Feb 10, 1993 | Oct 13, 1998 |
| 298 | Devon Energy Production Co, L.P. | 2 | 2 | 0 | 9 | Apr 25, 2006 | Apr 25, 2006 |
| 299 | Vintage Petroleum, Inc. | 2 | 2 | 0 | 4 | Mar 21, 1986 | Mar 21, 1986 |
| 300 | Finley Resources, Inc. | 2 | 2 | 0 | 3 | Jun 27, 2008 | Jan 11, 2011 |
763 OPERATORS · THE 300 MOST ACTIVE SHOWN · WINDOW ON THE RRC ISSUE DATE