| 101 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 102 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 103 | Hyndrex Resources | | Oil & Gas Operator | Apr 2018 |
| 104 | Impetro Resources LLC | | Oil & Gas Operator | Sep 2024 |
| 105 | Industrial Gas Services Inc | Wheat Ridge, CO 80033 | Oil & Gas Operator | Feb 2023 |
| 106 | Intermountain Oil Co | | Oil & Gas Operator | Nov 2003 |
| 107 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Sep 2024 |
| 108 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Dec 2024 |
| 109 | Jenex Petroleum Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2024 |
| 110 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Oct 2024 |
| 111 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2024 |
| 112 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |
| 113 | Kugler* Dean & Joe Dba D-J Oil Company | | Oil & Gas Operator | Sep 2019 |
| 114 | Lilis Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Aug 2017 |
| 115 | Longs Peak Resources LLC | Houston, TX 77019 | Oil & Gas Operator | Oct 2024 |
| 116 | Lundvall Oil & Gas Inc | | Oil & Gas Operator | Jan 2023 |
| 117 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 118 | M E III Corporation | | Oil & Gas Operator | Apr 2022 |
| 119 | Machii-Ross Petroleum Co | | Oil & Gas Operator | Apr 2014 |
| 120 | Magpie Operating, Inc | | Oil & Gas Operator | Sep 2024 |
| 121 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2024 |
| 122 | Markus Production, Inc | | Oil & Gas Operator | Mar 2021 |
| 123 | Matrix Energy LLC | | Oil & Gas Operator | Apr 2013 |
| 124 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Oct 2024 |
| 125 | MDS Energy Development LLC | | Oil & Gas Operator | Sep 2024 |
| 126 | Mendell Niobrara LLC | | Oil & Gas Operator | Apr 2017 |
| 127 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Dec 2024 |
| 128 | Mineral Resources, Incorporated | Lewisville, TX 75029 | Oil & Gas Operator | Dec 2024 |
| 129 | Monago Operating Inc | | Oil & Gas Operator | Mar 2017 |
| 130 | Monahan* Rex Family Trust | | Oil & Gas Operator | Sep 2010 |
| 131 | Nanke Energy LLC | Westminster, CO 80234 | Oil & Gas Operator | Sep 2024 |
| 132 | New Horizon Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jun 2006 |
| 133 | Nickel Road Operating LLC | | Oil & Gas Operator | Sep 2024 |
| 134 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
| 135 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 136 | North American Resources Company | Billings, MT 59101 | Oil & Gas Operator | Dec 2019 |
| 137 | O'Brien Energy Resources Corp | Portsmouth, NH 03801 | Oil & Gas Operator | Dec 2024 |
| 138 | Omimex Petroleum Inc | Fort Worth, TX 76120 | Oil & Gas Operator | Aug 2022 |
| 139 | Orr Energy LLC | | Oil & Gas Operator | Nov 2012 |
| 140 | Overland Resources LLC | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Jul 2019 |
| 141 | Oxbow Properties Inc | Centennial, CO 80122-1422 | Oil & Gas Operator | Sep 2024 |
| 142 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 143 | Painted Pegasus Petroleum LLC | | Oil & Gas Operator | Jul 2024 |
| 144 | Paladin Energy Partners LLC | | Oil & Gas Operator | Dec 2006 |
| 145 | Pancanadian Energy Resources Inc | | Oil & Gas Operator | Dec 2004 |
| 146 | Pape Oilfield Service Inc | | Oil & Gas Operator | Jul 2018 |
| 147 | Par Pacific Holdings Inc | | Oil & Gas Operator | Apr 2015 |
| 148 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 149 | PCR Operating LLC | | Oil & Gas Operator | Jul 2024 |
| 150 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Sep 2024 |
| 151 | Peterson Energy Operating Inc | Loveland, CO 80537 | Oil & Gas Operator | Oct 2024 |
| 152 | Petro Operating Company LLC | | Oil & Gas Operator | Sep 2024 |
| 153 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 154 | Petroleum Energy Corp | | Oil & Gas Operator | Aug 2012 |
| 155 | Petroleum Management LLC | Platteville, CO 80651 | Oil & Gas Operator | May 2011 |
| 156 | Petroshare Corporation | | Oil & Gas Operator | Jan 2024 |
| 157 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |
| 158 | Pozo Resources, Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 159 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Oct 2024 |
| 160 | Providence Operating LLC Dba Poco Operating | | Oil & Gas Operator | Sep 2024 |
| 161 | Ranchers Exploration Partners LLC | | Oil & Gas Operator | Jan 2015 |
| 162 | Recovery Energy Inc | | Oil & Gas Operator | Jan 2014 |
| 163 | Red Hawk Petroleum LLC | | Oil & Gas Operator | Sep 2024 |
| 164 | Red Willow Production, LLC | Ignacio, CO 81137 | Oil & Gas Operator | Oct 2015 |
| 165 | Renegade Oil & Gas Company LLC | | Oil & Gas Operator | Sep 2024 |
| 166 | Richardson Operating Company | Denver, CO 80237 | Oil & Gas Operator | Sep 2024 |
| 167 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 168 | Rocket Petroleum Company | | Oil & Gas Operator | Aug 2005 |
| 169 | Roughhouse Oil & Gas LLC | | Oil & Gas Operator | Oct 2024 |
| 170 | Rubicon Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2024 |
| 171 | RWL Enterprises | | Oil & Gas Operator | Feb 2017 |
| 172 | Sandlin Oil Corp | Dacono, CO 80514 | Oil & Gas Operator | Nov 2024 |
| 173 | Sawtooth Energy Partners LLC | | Oil & Gas Operator | Nov 2005 |
| 174 | Schneider Energy Services Inc | | Oil & Gas Operator | Aug 2024 |
| 175 | Setex Oil And Gas Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2012 |
| 176 | Shepler & Thomas, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Aug 2024 |
| 177 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
| 178 | Smith Energy Corp | | Oil & Gas Operator | Jan 2024 |
| 179 | Smith Energy LLC | | Oil & Gas Operator | Sep 2024 |
| 180 | Smith Oil Properties Inc | | Oil & Gas Operator | Nov 2022 |
| 181 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 182 | Soper Production | | Oil & Gas Operator | Dec 2011 |
| 183 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Oct 2024 |
| 184 | Sovereign Energy LLC | | Oil & Gas Operator | Sep 2011 |
| 185 | Sovereign Operating Company LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2016 |
| 186 | Spellbound Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2024 |
| 187 | St James Energy Operating Inc | | Oil & Gas Operator | Aug 2013 |
| 188 | Starlight Resources LLC | | Oil & Gas Operator | Jun 2006 |
| 189 | Stelbar Oil Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Aug 2024 |
| 190 | Stoneham Production LLC | | Oil & Gas Operator | Sep 2024 |
| 191 | Strachan Exploration Inc | Englewood, CO 80112 | Oil & Gas Operator | Sep 2024 |
| 192 | Summit Oil & Gas LLC | | Oil & Gas Operator | Oct 2024 |
| 193 | Sunburst, Inc. | Wheat Ridge, CO 80033 | Oil & Gas Operator | Aug 2024 |
| 194 | Sundance Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Jul 2014 |
| 195 | Sundance Resources, Inc. | Rio VIsta, TX 76093 | Oil & Gas Operator | Mar 2012 |
| 196 | Swift Beef Company | | Oil & Gas Operator | May 2006 |
| 197 | Synergy Resources Corporation | | Oil & Gas Operator | Oct 2022 |
| 198 | Tamco Drilling Inc | | Oil & Gas Operator | Apr 2003 |
| 199 | Tarpon Oil Company | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2017 |
| 200 | Texas American Resources Company | Austin, TX 78701 | Oil & Gas Operator | Dec 2024 |