| 1 | C & D Gas Co | Apollo, PA 15613-9714 | Oil & Gas Operator | Dec 2025 |
| 2 | Cady Myrle L | Sugar Grove, PA 16350-9803 | Oil & Gas Operator | Dec 2025 |
| 3 | Calarie Lee J & Lisa A | Rural Valley, PA 16249-4113 | Oil & Gas Operator | Dec 2025 |
| 4 | Caldera Resources LLC | Smicksburg, PA 16256-0055 | Gas Operator | Dec 2025 |
| 5 | Cameron Energy Co | Sheffield, PA 16347-2642 | Oil & Gas Operator | Dec 2025 |
| 6 | Campbell Dale H | McKeesport, PA 15135-3307 | Gas Operator | Dec 2017 |
| 7 | Campbell Oil & Gas Inc | Indiana, PA 15701-0278 | Oil & Gas Operator | Mar 2026 |
| 8 | Canton Oil & Gas Co | Pleasantville, PA 16341-1729 | Oil & Gas Operator | Dec 2004 |
| 9 | Capital Oil & Gas Inc | Austintown, OH 44515-3033 | Oil & Gas Operator | Dec 2025 |
| 10 | Carlon Oil & Gas Co Inc | Derby, KS 67037 | Gas Operator | Dec 2025 |
| 11 | Carnegie Natural Gas Co | Pittsburgh, PA 15236-1435 | Gas Operator | Dec 1991 |
| 12 | Carnegie Production Co | Charleston, WV 25328 | Oil & Gas Operator | Dec 2017 |
| 13 | Carol S Pultorak & Ra A Pultorak | Waynesburg, PA 15370-2434 | Gas Operator | Dec 2018 |
| 14 | Carrizo (Marcellus) LLC | Houston, TX 77002-5018 | Gas Operator | Jun 2019 |
| 15 | Casella Charles J | Avonmore, PA 15618-1028 | Oil & Gas Operator | Dec 2015 |
| 16 | Castex Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 17 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 18 | Castle Gas Company Inc | Pittsburgh, PA 15236-2466 | Oil & Gas Operator | Dec 2007 |
| 19 | Catalyst Energy Inc | Pittsburgh, PA 15218 | Oil & Gas Operator | Mar 2026 |
| 20 | Cedar Valley Energy Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2021 |
| 21 | Cgas Expl Inc | Columbus, OH 43214-1862 | Oil & Gas Operator | Dec 2006 |
| 22 | Charis Energy Inc | Kerrville, TX 78029-0469 | Oil & Gas Operator | Dec 2015 |
| 23 | Charis Energy LLC | Kerrville, TX 78029 | Oil & Gas Operator | Dec 2005 |
| 24 | Charles T Giewont | Edinboro, PA 16412-5415 | Gas Operator | Dec 2009 |
| 25 | Chautauqua Energy Inc | | Oil & Gas Operator | Dec 2020 |
| 26 | Chesapeake Appalachia, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2025 |
| 27 | Chestnut Oil LLC | Clarendon, PA 16313-2001 | Oil & Gas Operator | Dec 2022 |
| 28 | Chestnut Ridge Energy Of Pa LLC | Mineral Point, PA 15942-4411 | Gas Operator | Dec 2025 |
| 29 | Chestnut Ridge Storage LLC | San Diego, CA 92130 | Gas Operator | Dec 2025 |
| 30 | Chief Oil & Gas LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2022 |
| 31 | Christine Marie Exploration LP | Indiana, PA 15701-0515 | Oil & Gas Operator | Dec 2025 |
| 32 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Dec 2025 |
| 33 | Clean Energy Exploration & Production LLC | Norristown, PA 19403 | Gas Operator | Mar 2026 |
| 34 | Clifford & Scott McKeever | Clarksburg, PA 15725 | Gas Operator | Dec 2024 |
| 35 | Cline Oil Inc | Bradford, PA 16701 | Oil & Gas Operator | Dec 2025 |
| 36 | Clyde H & Rae M Peters | Waterford, PA 16441-8872 | Gas Operator | Dec 2007 |
| 37 | CNG Development Co | | Oil & Gas Operator | Dec 2008 |
| 38 | CNX Gas Company LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Mar 2026 |
| 39 | Coal Gas Recovery II LLC | Waynesburg, PA 15370 | Gas Operator | Dec 2017 |
| 40 | Coal Gas Recovery LLC | | Gas Operator | Dec 2012 |
| 41 | Coal Gas Recovery LP | Linthicum Heights, MD 21090-2227 | Gas Operator | Dec 2010 |
| 42 | Coastal Petro Corp | Oil City, PA 16301-6327 | Oil & Gas Operator | Jul 2018 |
| 43 | Cobra Resources LLC | North Jackson, OH 44451 | Oil & Gas Operator | Dec 2025 |
| 44 | Columbia Gas Trans LLC | Charleston, WV 25325-1273 | Gas Operator | Dec 1987 |
| 45 | Columbia Natural Res Inc | Charleston, WV 25362-0070 | Gas Operator | Dec 2008 |
| 46 | Columbia Natural Resources, LLC | Charleston, WV 23502 | Oil & Gas Operator | Dec 2021 |
| 47 | Columbus Oilfield Explor Co | Powell, OH 43065-9315 | Gas Operator | Dec 2004 |
| 48 | Commodore Energy Co | Rolling Hills, CA 90274-5265 | Oil & Gas Operator | Dec 2007 |
| 49 | Connie J & Ronald L Yeany | Fairmount City, PA 16224-1903 | Gas Operator | Dec 2025 |
| 50 | Consol Gas Company | Canonsburg, PA 15317 | Oil & Gas Operator | Dec 2021 |
| 51 | Consolidation Coal Company | Saint Clairsville, OH 43950-8742 | Oil & Gas Operator | Dec 2020 |
| 52 | Consortium Energy LLC | Tallmadge, OH 44278 | Oil & Gas Operator | Dec 2025 |
| 53 | Cook Energy Inc | Cooksburg, PA 16217-0054 | Oil & Gas Operator | Dec 2004 |
| 54 | Coolspring Gas & Oil Co LLC | Coolspring, PA 15730-8524 | Gas Operator | Dec 2025 |
| 55 | Copeland Gas LLC | Albion, PA 16401 | Gas Operator | Dec 2025 |
| 56 | Copper Ridge Oil Inc | Olean, NY 14760 | Oil & Gas Operator | Dec 2024 |
| 57 | Copperhead Enterprises LLC | | Oil & Gas Operator | Dec 2025 |
| 58 | Coterra Energy Inc | Coraopolis, PA 15108-9862 | Oil & Gas Operator | Mar 2026 |
| 59 | Cotton Well Drilling Co Inc | Sheridan, NY 14135 | Oil & Gas Operator | Dec 2024 |
| 60 | Cottonwood Opr Corp | | Gas Operator | Dec 1989 |
| 61 | Cottonwood Prod Co Inc | Buffalo, NY 14202-2212 | Gas Operator | Dec 2002 |
| 62 | Cougar Energy Inc | Oil City, PA 16301-4046 | Oil & Gas Operator | Dec 2013 |
| 63 | Curtis & Son Oil Inc | Sugar Grove, PA 16350 | Oil & Gas Operator | Dec 2025 |
| 64 | Curtis Oil Inc | Duke Center, PA 16729-0287 | Oil & Gas Operator | Dec 2025 |