| 301 | Geopetro LLC | Worthington, OH 43085-2316 | Oil & Gas Operator | Jul 2025 |
| 302 | Georgeanne & Thomas E Beresnyak | Home, PA 15747-6417 | Gas Operator | Dec 2018 |
| 303 | Glendale Gas Venture | Homer City, PA 15748-9232 | Gas Operator | Dec 2024 |
| 304 | Glenn Gas & Oil Co | Sigel, PA 15860-3234 | Oil & Gas Operator | Dec 2010 |
| 305 | Goe Pro Inc | Albion, PA 16401-9717 | Oil & Gas Operator | Dec 1991 |
| 306 | Graham Michael D | Oakdale, PA 15071-1088 | Oil & Gas Operator | Dec 2021 |
| 307 | Great Oak Energy, Inc. | Oakmont, PA 15139-2003 | Oil & Gas Operator | Feb 2021 |
| 308 | Great Plains Oper LLC Dba Great MTN Oper | Grapevine, TX 76051-5477 | Gas Operator | Nov 2015 |
| 309 | Greene Energy LLC | Pittsburgh, PA 15241-1405 | Gas Operator | Dec 2006 |
| 310 | Greene Mary E | Springboro, PA 16435-1635 | Oil & Gas Operator | Dec 2014 |
| 311 | Greenfield Baptist CH | North East, PA 16428-5610 | Gas Operator | Dec 2024 |
| 312 | Greenridge Oil Inc | New Freeport, PA 15352-1560 | Oil & Gas Operator | Dec 2024 |
| 313 | Greenway Energy LLC | Mayville, NY 14757 | Oil & Gas Operator | Dec 2024 |
| 314 | Greylock Conventional, LLC | Charleston, WV 25311 | Oil & Gas Operator | Jul 2025 |
| 315 | Greylock Opco LLC | Charleston, WV 25311 | Oil & Gas Operator | Dec 2024 |
| 316 | Greylock Production LLC | Charleston, WV 25311-1264 | Oil & Gas Operator | Jul 2025 |
| 317 | Guardian Exploration LLC | Hunt, TX 78024-0225 | Oil & Gas Operator | Dec 2011 |
| 318 | H & S Investments LLC | Fairview, PA 16415-1807 | Oil & Gas Operator | Dec 2024 |
| 319 | Ha Goal Inc | Indiana, PA 15701-2664 | Oil & Gas Operator | Dec 2018 |
| 320 | Haddad & Brooks Inc | Washington, PA 15301 | Oil & Gas Operator | Dec 2018 |
| 321 | Hahn Kahle E | Knox, PA 16232-4311 | Oil & Gas Operator | Dec 2003 |
| 322 | Halcon Opr Co Inc | Houston, TX 77002-5005 | Oil & Gas Operator | Jul 2017 |
| 323 | Hanley & Bird Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2011 |
| 324 | Harmony Oil & Gas Co Inc | Reno, NV 89509 | Oil Operator | Dec 1994 |
| 325 | Harold R Elkin | Punxsutawney, PA 15767-7922 | Oil & Gas Operator | Dec 2016 |
| 326 | Harper Crosby Holdings, LLC | Weston, WV 26452 | Oil & Gas Operator | Dec 2024 |
| 327 | Harus Inc | Indiana, PA 15701-9401 | Oil & Gas Operator | Dec 2024 |
| 328 | Hayden Harper Energy Ka, LLC | Charlotte, NC 28203-4173 | Oil & Gas Operator | Dec 2021 |
| 329 | Haysite Reinforced Plastics | Erie, PA 16509-3598 | Gas Operator | Dec 2024 |
| 330 | Heath 91 Cluster LP | Commodore, PA 15729-9109 | Gas Operator | Dec 2020 |
| 331 | Henry Patrick K | Chicora, PA 16025-4502 | Oil & Gas Operator | Dec 2024 |
| 332 | Herman Riemer Gas Co | Sarver, PA 16055-8507 | Oil & Gas Operator | Dec 2016 |
| 333 | HG Energy II Appalachia, LLC | | Oil & Gas Operator | Mar 2022 |
| 334 | Highhouse James R | Warren, PA 16365-7550 | Oil & Gas Operator | Dec 2008 |
| 335 | Highpointe Oil & Gas LLC | Indiana, PA 15701-8944 | Gas Operator | Dec 2024 |
| 336 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Oct 2025 |
| 337 | Hoffman George A | | Oil & Gas Operator | Dec 2022 |
| 338 | Holden Oil & Gas | Abilene, TX 79608 | Oil & Gas Operator | Dec 2024 |
| 339 | Hollis & Kathryn Nichols | Shinglehouse, PA 16748-2112 | Gas Operator | Dec 2015 |
| 340 | Hollobaugh Paul A | Mayport, PA 16240-1710 | Gas Operator | Dec 2024 |
| 341 | Home Gas & Oil Co Inc | Indiana, PA 15701-1532 | Oil & Gas Operator | Dec 2024 |
| 342 | Homeland Energy Ventures LLC | Pittsburgh, PA 15241-1633 | Oil & Gas Operator | Dec 2008 |
| 343 | Hoover Gregory M | Wattsburg, PA 16442-2209 | Gas Operator | Dec 2024 |
| 344 | Houston Exploration Co, The | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 345 | Howard Drilling Inc | Mount Jewett, PA 16740-0556 | Oil & Gas Operator | Dec 2024 |
| 346 | HR McClure | Scottdale, PA 15683-1533 | Gas Operator | Dec 2018 |
| 347 | Huffman Arthur | Waynesburg, PA 15370-1437 | Gas Operator | Dec 2024 |
| 348 | Hunt Marcellus Opr Co LLC | Wilcox, PA 15870 | Oil & Gas Operator | Jan 2019 |
| 349 | Huntley & Huntley Inc | Monroeville, PA 15146-2302 | Oil & Gas Operator | Dec 2019 |
| 350 | Idc Energy Corp | Warren, PA 16365-0792 | Oil & Gas Operator | Dec 2021 |
| 351 | Igas Corp | Charlottesville, VA 22905-5246 | Gas Operator | Dec 2000 |
| 352 | Il Geer & Sons Partnership | Clarendon, PA 16313-4107 | Oil & Gas Operator | Dec 2013 |
| 353 | Imod Oil Prod LLC | Pleasantville, PA 16341-0149 | Oil & Gas Operator | Dec 2009 |
| 354 | Indian Hill Gas Co Inc | Fayette City, PA 15438-1203 | Oil & Gas Operator | Dec 2024 |
| 355 | Inflection Energy (Pa) LLC | Montoursville, PA 17754-9702 | Gas Operator | Mar 2025 |
| 356 | Inr Opr LLC | Morgantown, WV 26508-9201 | Gas Operator | Jul 2025 |
| 357 | Integrity Funding Sys Inc | Lancaster, PA 17602-1933 | Gas Operator | Dec 2007 |
| 358 | Interstate Gas MKT Inc | Indiana, PA 15701 | Oil & Gas Operator | Dec 2018 |
| 359 | Iron Pennsylvania Land LLC | Waynesburg, PA 15370 | Gas Operator | Dec 2024 |
| 360 | Isaacs Scott J Jr | Butler, PA 16002-0059 | Gas Operator | Jul 2025 |
| 361 | Iseman William R | Ford City, PA 16226-1488 | Gas Operator | Dec 2024 |
| 362 | J & J Enterprises Inc | Indiana, PA 15701-1473 | Gas Operator | Dec 1985 |
| 363 | J & L Allen Inc | Sugar Grove, PA 16350-5606 | Oil & Gas Operator | Dec 2020 |
| 364 | J & M Co Inc | Abilene, TX 79601 | Oil & Gas Operator | Jan 2016 |
| 365 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Oct 2025 |
| 366 | Jab Enterprises Inc | Erie, PA 16510-2181 | Gas Operator | Dec 2009 |
| 367 | Jack Co | Indiana, PA 15701-0697 | Oil & Gas Operator | Dec 2013 |
| 368 | Jack Production Inc | Indiana, PA 15701-0697 | Oil & Gas Operator | Dec 2011 |
| 369 | James Drilling Corp | Blairsville, PA 15717 | Oil & Gas Operator | Dec 2004 |
| 370 | James E Mead Mead Oil Co | Sheffield, PA 16347-0667 | Oil & Gas Operator | Dec 2011 |
| 371 | JC Enterprises | Andrews, TX 79714 | Oil & Gas Operator | Jun 2012 |
| 372 | Jerome K & Rosemary Graber | Jamestown, PA 16134 | Oil & Gas Operator | Dec 2022 |
| 373 | Jesmar Energy Inc | Holbrook, PA 15341-1318 | Oil & Gas Operator | Dec 2024 |
| 374 | Jett Oil LLC | Warren, PA 16365-4366 | Oil & Gas Operator | Dec 2024 |
| 375 | JJ Bucher Producing Corp | Wellsville, NY 14895 | Oil & Gas Operator | Dec 2024 |
| 376 | JKLM Energy LLC | Sewickly, PA 15143 | Gas Operator | Jul 2025 |
| 377 | JMG Energy LLC | Cochranton, PA 16314 | Oil & Gas Operator | Dec 2024 |
| 378 | JMM Resources LLC | Indianola, PA 15051 | Oil & Gas Operator | Dec 2024 |
| 379 | John E Saul Corp | Apollo, PA 15613-8313 | Gas Operator | Dec 2024 |
| 380 | John F & Lewis L Garing | Chicora, PA 16025-2037 | Oil Operator | Dec 2024 |
| 381 | John F McConnell | Ebensburg, PA 15931-5408 | Gas Operator | Dec 2024 |
| 382 | John L Crawford Inc | New Bethlehem, PA 16242-2113 | Oil & Gas Operator | Dec 2024 |
| 383 | Jones Dev Inc | Warren, PA 16365-1460 | Oil & Gas Operator | Dec 2018 |
| 384 | Jr Resources LP | Ringgold, PA 15770-8346 | Oil & Gas Operator | Dec 2021 |
| 385 | Juart Exploration Inc | Home, PA 15747-6711 | Gas Operator | Dec 2017 |
| 386 | Judy M & Michael K Hetrick | New Bethlehem, PA 16242-1617 | Gas Operator | Dec 2024 |
| 387 | K & L Gas & Oil | Homer City, PA 15748-6033 | Gas Operator | Dec 2007 |
| 388 | K & L Gas & Oil Inc | Homer City, PA 15748-6033 | Oil & Gas Operator | Dec 2018 |
| 389 | K. Petroleum, Inc. | Gahanna, OH 43230 | Oil & Gas Operator | Jul 2025 |
| 390 | Kastle Resources Enterprises Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 391 | Kavouras Thomas | Apollo, PA 15613-1108 | Oil & Gas Operator | Dec 2023 |
| 392 | KCS Energy Inc | Warren, PA 16365-0187 | Oil & Gas Operator | Dec 2024 |
| 393 | Keane Dev | Bradford, PA 16701-3901 | Oil & Gas Operator | Dec 1998 |
| 394 | Keck Timothy A | Summerville, PA 15864-6301 | Gas Operator | Dec 2014 |
| 395 | Keith McClure | Waynesburg, PA 15370-3636 | Oil & Gas Operator | Dec 2018 |
| 396 | Kerpoe Stanley J | Tonawanda, NY 14150-8114 | Oil & Gas Operator | Dec 1989 |
| 397 | Kerr McGee Chem Corp | Oklahoma City, OK 73125-0861 | Gas Operator | Dec 1989 |
| 398 | Keyrock Energy LLC | Johnson City, TN 37604-5749 | Oil & Gas Operator | Dec 2024 |
| 399 | Keystate Inc | Davidsville, PA 15928-9655 | Gas Operator | Dec 2012 |
| 400 | Keystone Acquisitions LLC | Anita, PA 15711-9747 | Gas Operator | Dec 2024 |