| 1 | 1876 Resources LLC | Highlands Ranch, CO 80129 | Oil & Gas Operator | Oct 2025 |
| 2 | 31 Operating | | Oil & Gas Operator | Jul 2022 |
| 3 | 4-H Operating Corporation | | Oil & Gas Operator | Oct 2017 |
| 4 | 8 North LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 5 | Abilene Perfect Energy JV LLC | | Oil & Gas Operator | Dec 2017 |
| 6 | Abundance Energy Services LLC | Tulsa, OK 74114 | Gas Operator | Sep 2025 |
| 7 | Advanced Wireless Communications, L.L.C. | Farmington, NM 87401 | Oil & Gas Operator | Oct 2025 |
| 8 | Advantage Resources Inc | Broomfield, CO 80020 | Oil & Gas Operator | Jun 2025 |
| 9 | Aeon Energy Corp. | | Oil & Gas Operator | Oct 2025 |
| 10 | Alamosa Drilling Inc | Dallas, TX 75206-1841 | Oil & Gas Operator | Apr 2024 |
| 11 | Alan Howard Karchmer Living Trust | | Oil Operator | Dec 2022 |
| 12 | Alta Mesa Services, LP | Houston, TX 77084 | Oil & Gas Operator | Dec 2025 |
| 13 | American Helium LLC | | Oil & Gas Operator | Sep 2025 |
| 14 | American Petroleum Energy Co | | Gas Operator | Sep 2025 |
| 15 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 16 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 17 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 18 | Antler Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | Jun 2025 |
| 19 | Apex Oil Ventures Inc | | Oil & Gas Operator | Aug 2025 |
| 20 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | Dec 2025 |
| 21 | Argali Exploration Company | | Oil & Gas Operator | Aug 2025 |
| 22 | Argonex Company LLC | | Oil & Gas Operator | Jan 2024 |
| 23 | Ark Trust, Carol W Byrd Trustee | | Oil Operator | Oct 2025 |
| 24 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 25 | Aurora Power Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Aug 2018 |
| 26 | Aus-Tex Exploration, Inc | | Oil & Gas Operator | Oct 2025 |
| 27 | Ausmus & Clark Oil | | Oil Operator | Jul 2022 |
| 28 | Axis Exploration LLC | | Oil & Gas Operator | Sep 2025 |
| 29 | B & B Oil Company LTD | | Gas Operator | Mar 2020 |
| 30 | Baney Well Service Inc | Denver, CO 80237 | Oil Operator | Dec 2015 |
| 31 | Barrett Corporation* Bill | | Oil & Gas Operator | Sep 2025 |
| 32 | Bataa Oil Inc | Arvada, CO 80005 | Oil & Gas Operator | Oct 2025 |
| 33 | Bates* James Edward | | Oil & Gas Operator | Jul 2017 |
| 34 | Bayless Producer LLC* Robert L | | Oil & Gas Operator | Sep 2025 |
| 35 | Bayswater Exploration & Production LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 36 | Beartooth Oil & Gas Company | Billings, MT 59103 | Oil & Gas Operator | Oct 2025 |
| 37 | Becca Oil LLC | Cushing, OK 74023-1347 | Oil & Gas Operator | Aug 2025 |
| 38 | Beeman Oil & Gas LLC | | Oil & Gas Operator | Oct 2025 |
| 39 | Behrens Resources Inc | | Oil & Gas Operator | Jul 2019 |
| 40 | Benchmark Energy LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2023 |
| 41 | Benson-Montin-Greer DRLG Corp | Farmington, NM 87402 | Oil & Gas Operator | Oct 2025 |
| 42 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 43 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Oct 2025 |
| 44 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 45 | Berry Energy Inc*Walter | | Oil & Gas Operator | Aug 2016 |
| 46 | Berry Petroleum Company LLC | Bakersfield, CA 93311 | Oil & Gas Operator | Oct 2025 |
| 47 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 48 | Bison IV Operating LLC | | Oil & Gas Operator | Oct 2025 |
| 49 | Black Hills Exploration & Production Inc | Newcastle, WY 82701 | Oil & Gas Operator | Mar 2018 |
| 50 | Black Hills Plateau Production LLC | | Gas Operator | Sep 2016 |
| 51 | Blackrock Energy Corp | | Oil & Gas Operator | Sep 2025 |
| 52 | Blue Chip Oil Inc | | Oil & Gas Operator | Oct 2025 |
| 53 | Blue Creek Inc | Fort Worth, TX 76181 | Oil & Gas Operator | Jul 2002 |
| 54 | Bluestone Natural Resources II LLC | | Oil & Gas Operator | Mar 2017 |
| 55 | Bonanza Creek Energy Operating Company LLC | | Oil & Gas Operator | Sep 2025 |
| 56 | Booco'S Contract Services Inc | | Oil & Gas Operator | Jan 2021 |
| 57 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Aug 2025 |
| 58 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 59 | Brooks Exploration Inc | Denver, CO 80293 | Oil & Gas Operator | Mar 2001 |
| 60 | Brown Oil & Gas LLC | | Oil & Gas Operator | Sep 2025 |
| 61 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 62 | Burr Oil & Gas Inc | Farmington, NM 87499 | Oil & Gas Operator | Oct 2019 |
| 63 | Byron Oil Industries Inc | Ballwin, MO 63011 | Oil & Gas Operator | Apr 2019 |
| 64 | C & J Field Services | | Oil & Gas Operator | Sep 2025 |
| 65 | Caerus Piceance LLC | | Oil & Gas Operator | Sep 2025 |
| 66 | Caerus Washco LLC | Denver, CO 80202 | Gas Operator | Mar 2015 |
| 67 | Carrizo Niobrara LLC | | Oil & Gas Operator | Jun 2017 |
| 68 | Catamount Energy Partners LLC | Denver, CO 80202 | Gas Operator | Oct 2025 |
| 69 | CDM Oil & Gas | | Oil & Gas Operator | Apr 2017 |
| 70 | Ceh Operating LLC | | Oil & Gas Operator | Sep 2025 |
| 71 | Central Operating Inc | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 72 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Oct 2025 |
| 73 | Chandler DJ Basin LLC | | Oil & Gas Operator | Dec 2007 |
| 74 | Charles P Dunning LLC | | Oil & Gas Operator | Sep 2025 |
| 75 | Chemco Inc | | Oil & Gas Operator | Sep 2023 |
| 76 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 77 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 78 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 79 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |
| 80 | Cholla Production LLC | Littleton, CO 80127 | Oil & Gas Operator | Jun 2025 |
| 81 | Churchill Energy, Inc. | | Oil & Gas Operator | Aug 2020 |
| 82 | Cig Resources Company | Colorado Spring, CO 80944-1087 | Oil & Gas Operator | Jun 2018 |
| 83 | Cinnamon Creek Oil & Gas Inc | | Oil Operator | Oct 2025 |
| 84 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Dec 2025 |
| 85 | City & County Of Denver | | Oil & Gas Operator | Sep 2023 |
| 86 | Civitas North LLC | | Oil & Gas Operator | Sep 2025 |
| 87 | CM Production, LLC | | Oil & Gas Operator | Aug 2020 |
| 88 | Colorado Interstate Gas Company LLC | Colorado Springs, CO 80944 | Oil & Gas Operator | Sep 2025 |
| 89 | Colton Limited Liability Co | | Oil & Gas Operator | Sep 2023 |
| 90 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 91 | Consolidated Resources, Inc. | | Oil & Gas Operator | May 2004 |
| 92 | Copper Land Resources LLC | | Oil Operator | Sep 2025 |
| 93 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Jun 2025 |
| 94 | Crestone Peak Resources Operating LLC | | Oil & Gas Operator | Sep 2025 |
| 95 | Crowheart Energy LLC | Baggs, WY 82321 | Oil & Gas Operator | Sep 2025 |
| 96 | Cub Creek Energy LLC | | Oil & Gas Operator | Mar 2019 |
| 97 | CWC Petro LLC | | Gas Operator | Dec 2024 |
| 98 | Dakota Exploration LLC | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2025 |
| 99 | Danmar Production Company LLC | | Oil & Gas Operator | Dec 2022 |
| 100 | Declar Oil & Gas Inc | | Oil & Gas Operator | Dec 2012 |