| 1 | Banding M R Inc | Gillette, WY 82717 | Oil & Gas Operator | Mar 2026 |
| 2 | Barn Owls LLC | | Oil & Gas Operator | May 2026 |
| 3 | Bearcat Energy LLC (Colorado) | Denver, CO 80202 | Oil & Gas Operator | May 2022 |
| 4 | Berco Resources LLC | Denver, CO 80206 | Oil & Gas Operator | Sep 2009 |
| 5 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Jun 2026 |
| 6 | Big Chief Exploration | Palisades, CO 81526 | Oil & Gas Operator | Oct 1993 |
| 7 | Bill Barrett Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 8 | Bird Oil Corporation | | Oil & Gas Operator | Jul 1992 |
| 9 | Black Diamond Energy Inc | Pittsburgh, PA 15237 | Gas Operator | May 2016 |
| 10 | Black Hills Exploration & Production Inc | Newcastle, WY 82701 | Oil & Gas Operator | Mar 2018 |
| 11 | Blackjack Oil, Inc. | Las Vegas, NV 89128 | Oil & Gas Operator | Nov 2019 |
| 12 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |
| 13 | BP Exploration Inc | | Oil & Gas Operator | May 1993 |
| 14 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 15 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2026 |
| 16 | Burlington Resources Oil & Gas Company L | Gillette, WY 82718 | Oil & Gas Operator | Jan 2022 |
| 17 | BXP Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Jul 2026 |
| 18 | Carbon Creek Energy LLC | Sheridan, WY 82801 | Oil & Gas Operator | Apr 2026 |
| 19 | Cenergy Resources LLC | | Oil & Gas Operator | Jan 2026 |
| 20 | CH4 Energy LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2006 |
| 21 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | May 2026 |
| 22 | Chemily Management Company | Cypress, TX 77429 | Oil & Gas Operator | Apr 2023 |
| 23 | Chipcore LLC | Casper, WY 82601 | Oil & Gas Operator | May 2026 |
| 24 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Jul 2026 |
| 25 | CNX Gas Company LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Apr 2026 |
| 26 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 27 | Comet Energy Services LLC | Traverse City, MI 49686 | Oil & Gas Operator | Oct 2011 |
| 28 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 29 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 30 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | May 2026 |
| 31 | Continental Production Co LLC | Greenwood VIllage, CO 80155 | Oil & Gas Operator | Aug 2012 |
| 32 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Jul 2026 |
| 33 | Daube Company The | Ardmore, OK 73401 | Oil & Gas Operator | May 2026 |
| 34 | Davey Corporation | Golden, CO 80401 | Oil & Gas Operator | May 2026 |
| 35 | Davis Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 1988 |
| 36 | Davis Petroleum Corp. | Houston, TX 77027 | Oil & Gas Operator | Jul 2026 |
| 37 | DCD Inc | Gillette, WY 82716 | Oil & Gas Operator | Aug 2003 |
| 38 | Denbury Onshore, LLC | Spring, TX 77389 | Oil & Gas Operator | Jul 2026 |
| 39 | Deuel Arch W | | Oil & Gas Operator | Aug 1995 |
| 40 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2026 |
| 41 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 42 | Diamond Oil & Gas LLC | Casper, WY 82604 | Oil & Gas Operator | May 2026 |
| 43 | Dome Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 44 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 45 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | May 2026 |
| 46 | Elf Aquitaine Inc | Houston, TX 77002 | Oil & Gas Operator | May 1991 |
| 47 | Enerex Limited Liability Co | Craig, CO 81625 | Oil & Gas Operator | Sep 2025 |
| 48 | Energetics Inc | Englewood, CO 80155 | Oil & Gas Operator | Aug 1985 |
| 49 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 50 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Jul 2026 |
| 51 | EOG Y Resources Inc | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
| 52 | Equitable Resources Energy Company | Big Stone Gap, VA 24219 | Oil & Gas Operator | Dec 1997 |
| 53 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jul 2026 |
| 54 | Falcon Creek Resources, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2001 |
| 55 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Jul 2026 |
| 56 | Federated Oil & Gas Properties | Traverse City, MI 49685 | Gas Operator | Mar 2014 |
| 57 | Fidelity Exploration & Production Company | Denver, CO 80203 | Oil & Gas Operator | Jun 2026 |
| 58 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 59 | Hershey Oil Corporation | | Oil & Gas Operator | Jul 1992 |
| 60 | High Plains Gas LLC | Gillette, WY 82717 | Gas Operator | Aug 2014 |
| 61 | Highland Exploration | | Oil Operator | Sep 1979 |
| 62 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Jul 2026 |
| 63 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Jul 2026 |
| 64 | Hot Springs Resources LTD | Casper, WY 82601 | Oil Operator | Dec 2014 |
| 65 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Jul 2026 |
| 66 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 2026 |
| 67 | Jayne Morton Living Trust | Troup, TX 75789 | Oil Operator | Jul 2023 |
| 68 | Jims Water Service Inc | Gillette, WY 82717 | Oil & Gas Operator | Oct 2016 |
| 69 | JN Exploration & Production | Billings, MT 59103-0159 | Oil & Gas Operator | Apr 2001 |
| 70 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2026 |
| 71 | Kase Energy LLC | Roseville, MN 55113 | Oil Operator | Aug 2006 |
| 72 | Kennedy Oil | Gillette, WY 82716 | Oil & Gas Operator | May 2026 |
| 73 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Feb 2026 |
| 74 | Lance Oil & Gas Company Inc | Kirtland, NM 87417 | Oil & Gas Operator | Mar 2013 |
| 75 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Jul 2026 |
| 76 | Loil Oil LLC | Golden, CO 80402 | Oil & Gas Operator | Mar 2026 |
| 77 | Loundagin N B | Casper, WY 82602 | Oil & Gas Operator | Sep 2015 |
| 78 | M K M Oil Company | Casper, WY 82602 | Oil & Gas Operator | Jun 1996 |
| 79 | Manx Oil Corporation | Casper, WY 82601 | Oil & Gas Operator | Jun 2010 |
| 80 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | May 2026 |
| 81 | Marlin Oil Company LLC | Gillette, WY 82718 | Oil & Gas Operator | Mar 2023 |
| 82 | Matrix Production Company | Sugar Land, TX 77478 | Oil & Gas Operator | May 2026 |
| 83 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | May 2026 |
| 84 | Meadow Deep LLC | | Oil & Gas Operator | May 2026 |
| 85 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 86 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2026 |
| 87 | Meritage Energy Partners LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 88 | Merrion Oil & Gas Corp | Farmington, NM 87401 | Oil & Gas Operator | May 2026 |
| 89 | Meyer Douglas P | Longmont, CO 80501 | Oil & Gas Operator | Aug 2006 |
| 90 | Mi3 Energy LLC | | Oil & Gas Operator | May 2026 |
| 91 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2026 |
| 92 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 93 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | May 2026 |
| 94 | Montex Drilling Company LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2026 |
| 95 | MTG Operating Inc | Ridgeland, MS 39158 | Gas Operator | Apr 2011 |
| 96 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
| 97 | Navigation Powder River LLC | Houston, TX 77024 | Oil & Gas Operator | May 2026 |
| 98 | Nielson & Associates, Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 99 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Jul 2026 |
| 100 | Nonsuch Natural Gas Inc | Naples, FL 34108 | Oil & Gas Operator | Jun 2026 |