| 301 | Evergreen Resource Co | Warren, PA 16365-4321 | Oil & Gas Operator | Dec 2025 |
| 302 | Exchange Oil & Gas Inc | Cuba, NY 14727-9760 | Oil & Gas Operator | Dec 2008 |
| 303 | Exco Resources (Pa), LLC | Montoursville, PA 17754-2235 | Oil & Gas Operator | Dec 2025 |
| 304 | Exco Resources Pa Inc | Warrendale, PA 15086-6501 | Oil & Gas Operator | Dec 2011 |
| 305 | Exley Oil & Gas Corp | Lemont, PA 16851-0425 | Oil & Gas Operator | Dec 2019 |
| 306 | Exotic Oil & Gas LLC | Indiana, PA 15701-3634 | Oil & Gas Operator | Dec 2025 |
| 307 | Expand Oper LLC | Morgantown, WV 26508 | Oil & Gas Operator | Dec 2025 |
| 308 | Exploration Energy Inc | Cortland, OH 44410 | Oil & Gas Operator | Dec 2009 |
| 309 | F & S Oil | | Oil Operator | Dec 2021 |
| 310 | Fairman Corp | Du Bois, PA 15801-0288 | Oil & Gas Operator | Dec 2025 |
| 311 | Fairman Drilling Co | Du Bois, PA 15801-0288 | Oil & Gas Operator | Dec 2002 |
| 312 | Fairman Oil & Gas Co Inc | Oil City, PA 16301 | Oil & Gas Operator | Dec 1991 |
| 313 | Farabaugh Arthur R & John A | Loretto, PA 15940-8001 | Gas Operator | Dec 2015 |
| 314 | Farrington & Hepler Gas & Oil Inc | Seneca, PA 16346-0546 | Oil & Gas Operator | Dec 2024 |
| 315 | Fawnwood Energy Inc | Bruin, PA 16022-0157 | Oil & Gas Operator | Dec 2025 |
| 316 | Feikls Oil & Gas Inc | Eagle, ID 83616-7713 | Oil & Gas Operator | Dec 2025 |
| 317 | Felmont Oil Corporation | Walnut Creek, CA 94596-3568 | Oil & Gas Operator | Feb 1990 |
| 318 | Ferraro Prod | Indiana, PA 15701-0543 | Gas Operator | Dec 1994 |
| 319 | Fetterman Samuel C SR | Rossiter, PA 15772 | Gas Operator | Dec 2025 |
| 320 | Finish Thompson Inc | Erie, PA 16501-1525 | Gas Operator | Dec 2025 |
| 321 | Finnegan Gas Corp | Wind Ridge, PA 15380-1212 | Gas Operator | Dec 2019 |
| 322 | First Alliance CH | Erie, PA 16506-5024 | Gas Operator | Dec 2017 |
| 323 | First Amer Energy Inc | Bradford, PA 16701-0184 | Oil & Gas Operator | Dec 2025 |
| 324 | Flanigan Bros | Edinboro, PA 16412-1443 | Oil & Gas Operator | Dec 2024 |
| 325 | Flatirons Development LLC | Westminster, CO 80020-2771 | Gas Operator | Dec 2015 |
| 326 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Feb 2026 |
| 327 | Fork Run Oil & Gas LLC | Sheffield, PA 16347-0012 | Oil & Gas Operator | Dec 2025 |
| 328 | Formentera Opr LLC | Austin, TX 78701-4889 | Gas Operator | Dec 2025 |
| 329 | Forrest Richard E | New Bethlehem, PA 16242-2547 | Gas Operator | Dec 2019 |
| 330 | Fortress Energy Corp | Pittsburgh, PA 15217-4207 | Oil & Gas Operator | Dec 2023 |
| 331 | Frank L Washabaugh Oil Producers | Imperial, PA 15126-1050 | Oil & Gas Operator | Dec 2010 |
| 332 | Frederick Don C | Tylersburg, PA 16361-0066 | Gas Operator | Dec 1985 |
| 333 | Frederick Drilling Co & Sons Inc | Tylersburg, PA 16361-0066 | Oil & Gas Operator | Dec 2017 |
| 334 | Frontier Natural Resources | Bellefonte, PA 16823 | Gas Operator | Dec 2025 |
| 335 | G & G Gas Inc | New Bethlehem, PA 16242-4118 | Oil & Gas Operator | Dec 2025 |
| 336 | Galati Enterprises Inc | Jamestown, NY 14701-9358 | Oil & Gas Operator | Dec 2018 |
| 337 | Gallatin Fuels, Inc. | Uniontown, PA 15401-5513 | Oil & Gas Operator | Dec 2020 |
| 338 | Garold M Oakes | Kane, PA 16735-0442 | Oil & Gas Operator | Dec 2009 |
| 339 | Gas & Oil Co | Apollo, PA 15613-1108 | Oil & Gas Operator | Dec 2007 |
| 340 | Gas & Oil MGMT Assn Inc | Youngsville, PA 16371-1602 | Oil & Gas Operator | Dec 2025 |
| 341 | Gas Acquisition Co LTD | Akron, OH 44308 | Oil & Gas Operator | Dec 2017 |
| 342 | Gasp Investment LLC | Cherry Tree, PA 15724-7704 | Oil & Gas Operator | Dec 2025 |
| 343 | Gass Energy LLC | Sugar Grove, PA 16350 | Gas Operator | Dec 2025 |
| 344 | Gastar Expl Inc | Houston, TX 77010-3131 | Oil & Gas Operator | Dec 2015 |
| 345 | Geer I L | Clarendon, PA 16313-0126 | Oil & Gas Operator | Dec 2013 |
| 346 | General Electric Company | Erie, PA 16531-0001 | Oil & Gas Operator | Sep 1987 |
| 347 | Geopetro LLC | Worthington, OH 43085-2316 | Oil & Gas Operator | Dec 2025 |
| 348 | Georgeanne & Thomas E Beresnyak | Home, PA 15747-6417 | Gas Operator | Dec 2018 |
| 349 | Glendale Gas Venture | Homer City, PA 15748-9232 | Gas Operator | Dec 2024 |
| 350 | Glenn Gas & Oil Co | Sigel, PA 15860-3234 | Oil & Gas Operator | Dec 2010 |
| 351 | Glenn Perry W | Sigel, PA 15860-3234 | Gas Operator | Dec 2019 |
| 352 | Goe Pro Inc | Albion, PA 16401-9717 | Oil & Gas Operator | Dec 1991 |
| 353 | Graham Michael D | Oakdale, PA 15071-1088 | Oil & Gas Operator | Dec 2021 |
| 354 | Great Oak Energy, Inc. | Oakmont, PA 15139-2003 | Oil & Gas Operator | Feb 2021 |
| 355 | Great Plains Oper LLC Dba Great MTN Oper | Grapevine, TX 76051-5477 | Gas Operator | Nov 2015 |
| 356 | Greene Energy LLC | Pittsburgh, PA 15241-1405 | Gas Operator | Dec 2006 |
| 357 | Greene Mary E | Springboro, PA 16435-1635 | Oil & Gas Operator | Dec 2014 |
| 358 | Greenfield Baptist CH | North East, PA 16428-5610 | Gas Operator | Dec 2025 |
| 359 | Greenridge Oil Inc | New Freeport, PA 15352-1560 | Oil & Gas Operator | Dec 2025 |
| 360 | Greenway Energy LLC | Mayville, NY 14757 | Oil & Gas Operator | Dec 2025 |
| 361 | Greylock Conventional, LLC | Charleston, WV 25311 | Oil & Gas Operator | Dec 2025 |
| 362 | Greylock Opco LLC | Charleston, WV 25311 | Oil & Gas Operator | Dec 2025 |
| 363 | Greylock Production LLC | Charleston, WV 25311-1264 | Oil & Gas Operator | Dec 2025 |
| 364 | Guardian Exploration LLC | Hunt, TX 78024-0225 | Oil & Gas Operator | Dec 2011 |
| 365 | H & S Gas & Oil | Trafford, PA 15085-2828 | Gas Operator | Dec 2009 |
| 366 | H & S Investments LLC | Fairview, PA 16415-1807 | Oil & Gas Operator | Dec 2025 |
| 367 | Ha Goal Inc | Indiana, PA 15701-2664 | Oil & Gas Operator | Dec 2018 |
| 368 | Haddad & Brooks Inc | Washington, PA 15301 | Oil & Gas Operator | Dec 2018 |
| 369 | Hahn Kahle E | Knox, PA 16232-4311 | Oil & Gas Operator | Dec 2003 |
| 370 | Halcon Opr Co Inc | Houston, TX 77002-5005 | Oil & Gas Operator | Jul 2017 |
| 371 | Hanley & Bird Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2011 |
| 372 | Harborcreek SCH Dist | Harborcreek, PA 16421-1606 | Oil & Gas Operator | Dec 2025 |
| 373 | Harmony Oil & Gas Co Inc | Reno, NV 89509 | Oil Operator | Dec 1994 |
| 374 | Harold R & Richard B Elkin | Punxsutawney, PA 15767-7922 | Gas Operator | Dec 2016 |
| 375 | Harold R Elkin | Punxsutawney, PA 15767-7922 | Oil & Gas Operator | Dec 2016 |
| 376 | Harper Crosby Holdings, LLC | Weston, WV 26452 | Oil & Gas Operator | Dec 2025 |
| 377 | Harus Inc | Indiana, PA 15701-9401 | Oil & Gas Operator | Dec 2025 |
| 378 | Hastings Acquistion LLC | Cherry Tree, PA 15724-7309 | Gas Operator | Dec 2024 |
| 379 | Hayden Harper Energy Ka, LLC | Charlotte, NC 28203-4173 | Oil & Gas Operator | Dec 2021 |
| 380 | Haysite Reinforced Plastics | Erie, PA 16509-3598 | Gas Operator | Dec 2024 |
| 381 | Heath 91 Cluster LP | Commodore, PA 15729-9109 | Gas Operator | Dec 2025 |
| 382 | Hemenger Daniel A | Erie, PA 16510-2035 | Gas Operator | Dec 2025 |
| 383 | Henry Patrick K | Chicora, PA 16025-4502 | Oil & Gas Operator | Dec 2025 |
| 384 | Herbert A Thomas | Cambridge Springs, PA 16403-2555 | Gas Operator | Dec 2025 |
| 385 | Herman Riemer Gas Co | Sarver, PA 16055-8507 | Oil & Gas Operator | Dec 2016 |
| 386 | Hetricks Farm Sply Inc | New Bethlehem, PA 16242-1832 | Gas Operator | Dec 2025 |
| 387 | HG Energy II Appalachia, LLC | | Oil & Gas Operator | Mar 2022 |
| 388 | Highhouse James R | Warren, PA 16365-7550 | Oil & Gas Operator | Dec 2008 |
| 389 | Highpointe Oil & Gas LLC | Indiana, PA 15701-8944 | Gas Operator | Dec 2025 |
| 390 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Feb 2026 |
| 391 | Hoffman George A | | Oil & Gas Operator | Dec 2022 |
| 392 | Holden Oil & Gas | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 393 | Holden Res LLC | Tiona, PA 16352-0292 | Oil & Gas Operator | Dec 2025 |
| 394 | Hollis & Kathryn Nichols | Shinglehouse, PA 16748-2112 | Gas Operator | Dec 2015 |
| 395 | Hollobaugh Paul A | Mayport, PA 16240-1710 | Gas Operator | Dec 2025 |
| 396 | Home Gas & Oil Co Inc | Indiana, PA 15701-1532 | Oil & Gas Operator | Dec 2025 |
| 397 | Homeland Energy Ventures LLC | Pittsburgh, PA 15241-1633 | Oil & Gas Operator | Dec 2008 |
| 398 | Hoover Gregory M | Wattsburg, PA 16442-2209 | Gas Operator | Dec 2025 |
| 399 | Houston Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 400 | Howard Drilling Inc | Mount Jewett, PA 16740-0556 | Oil & Gas Operator | Dec 2025 |