| 18501 | Memorial Exploration Company | Saint Louis, MO 63105 | Oil & Gas Operator | Aug 1996 |
| 18502 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 18503 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 18504 | Mendell Davis Gas Partners LLC | | Oil & Gas Operator | Dec 2013 |
| 18505 | Mendell Finisterre II LLC | | Oil & Gas Operator | Jun 2017 |
| 18506 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 18507 | Meng Oper & Expl Co | | Oil & Gas Operator | Dec 1989 |
| 18508 | Meng, Charles H | Lexington, KY 40502 | Gas Operator | Dec 2024 |
| 18509 | Menoah Petroleum Inc | | Oil & Gas Operator | Dec 2024 |
| 18510 | Mentren Corporation | | Gas Operator | Jul 2026 |
| 18511 | Mep Operating LLC | Houston, TX 77056-2733 | Oil & Gas Operator | Aug 2025 |
| 18512 | Mer Resources | Edmond, OK 73013 | Oil & Gas Operator | Sep 2026 |
| 18513 | Mer Resources Inc | Edmond, OK 73013-7662 | Oil & Gas Operator | Mar 2015 |
| 18514 | Mercantile Oil & Gas Prod. Corp. | Galena Park, TX 77547 | Oil & Gas Operator | Jun 2016 |
| 18515 | Mercer Oil And Gas Co Inc | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 18516 | Mercer Pet Management Inc | Edmond, OK 73013-6677 | Oil & Gas Operator | Jan 2011 |
| 18517 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 18518 | Mercury Operating, LLC | Dallas, TX 75208 | Oil & Gas Operator | Sep 2026 |
| 18519 | Mercury Petroleum Company, Inc | | Oil Operator | Dec 2018 |
| 18520 | Mercury Resources LLC | | Oil & Gas Operator | Jun 2026 |
| 18521 | Meredith Enterprises | | Oil Operator | Jun 1988 |
| 18522 | Mereken Energy Corp. | Fort Worth, TX 76102 | Gas Operator | Feb 2006 |
| 18523 | Merelco Inc | Seminole, OK 74868 | Oil Operator | Jun 2014 |
| 18524 | Merenco | Midland, TX 79702 | Oil & Gas Operator | Dec 1996 |
| 18525 | Merex Resources, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Sep 2019 |
| 18526 | Meridian Energy Company | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2010 |
| 18527 | Meridian Energy Inc. | | Oil Operator | Apr 2026 |
| 18528 | Meridian Exploration Inc | Oklahoma City, OK 73128 | Oil & Gas Operator | Aug 2013 |
| 18529 | Meridian Exploration Corp. | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2021 |
| 18530 | Meridian Interests, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Aug 2003 |
| 18531 | Meridian Oil & Gas Enter | Blairsville, PA 15717 | Oil & Gas Operator | Dec 2004 |
| 18532 | Meridian Oil & Gas Enterprises Inc | | Oil & Gas Operator | Dec 2003 |
| 18533 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 18534 | Meridian Oil Inc.-Midland | Midland, TX 79702 | Oil & Gas Operator | Jul 1996 |
| 18535 | Meridian Oil Offshore Inc. | | Oil & Gas Operator | Aug 1996 |
| 18536 | Meridian Oil Production Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 2024 |
| 18537 | Meridian Production Services LLC | | Oil & Gas Operator | Jun 2026 |
| 18538 | Meridian Resource & Expl Co, The | Houston, TX 77077 | Oil & Gas Operator | Dec 2000 |
| 18539 | Meridian Resource & Expl LLC,The | Houston, TX 77094 | Oil & Gas Operator | Nov 2012 |
| 18540 | Meridian Resources LLC | Evansville, IN 47715 | Oil Operator | Jul 2024 |
| 18541 | Meridian Resources USA Inc | | Oil & Gas Operator | Aug 2024 |
| 18542 | Merimac Investments, Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Jan 1997 |
| 18543 | Merit Energy Co. Dba Alabama Merit Energy Co., Inc. | | Oil & Gas Operator | Aug 2005 |
| 18544 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Sep 2026 |
| 18545 | Merit Energy Company, LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2026 |
| 18546 | Merit Field LLC | | Oil & Gas Operator | Dec 2001 |
| 18547 | Merit Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | May 1994 |
| 18548 | Merit Productions | | Oil Operator | Sep 1996 |
| 18549 | Meritage Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | May 2013 |
| 18550 | Meritage Energy Partners LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 18551 | Meritage Homes Of California Inc. | | Oil Operator | Dec 2020 |
| 18552 | Merkaz Drilling, LLC | Dallas, TX 75229 | Oil Operator | Sep 2026 |
| 18553 | Merkin LLC | Austin, TX 78737 | Oil Operator | Sep 2026 |
| 18554 | Merl Wiggins Et Al | | Oil & Gas Operator | Sep 1996 |
| 18555 | Merlin J Verret | | Gas Operator | Jun 1986 |
| 18556 | Merlon Texas, Inc. | Houston, TX 77056 | Oil Operator | Jun 2013 |
| 18557 | Mermac Operating Company Inc | Norman, OK 73072 | Oil & Gas Operator | Mar 2015 |
| 18558 | Meroda Resources LLC | Mustang, OK 73064-9408 | Oil & Gas Operator | Apr 2000 |
| 18559 | Merrick Oil & Gas | | Oil & Gas Operator | Apr 2026 |
| 18560 | Merrick Ward S Inc | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2001 |
| 18561 | Merrico Resource | | Oil Operator | Dec 1996 |
| 18562 | Merrico Resources | | Oil Operator | Mar 1992 |
| 18563 | Merrico Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2008 |
| 18564 | Merrill Natural Res Inc | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 1985 |
| 18565 | Merrill Operating, LLC | Snyder, TX 79550 | Oil Operator | Apr 2016 |
| 18566 | Merrill, Brian G. | Depew, NY 14043 | Gas Operator | Dec 2025 |
| 18567 | Merrimac Energy Corp. | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 18568 | Merrion & Bayless | Farmington, NM 87401 | Oil & Gas Operator | May 1982 |
| 18569 | Merrion Oil & Gas Corp | Farmington, NM 87401 | Oil & Gas Operator | Jul 2026 |
| 18570 | Merritt Oil Comp | | Oil Operator | Jan 1990 |
| 18571 | Merritt Operating, Inc. | Mineola, TX 75773 | Oil & Gas Operator | Sep 2026 |
| 18572 | Merritt, William Kevin | Dallas, TX 75225 | Oil & Gas Operator | Dec 1994 |
| 18573 | Mert Development Inc | | Oil & Gas Operator | Dec 2021 |
| 18574 | Merta, Mike | Alice, TX 78333 | Oil & Gas Operator | Aug 2005 |
| 18575 | Mertz Energy LLC | Houston, TX 77098 | Oil & Gas Operator | Jan 2025 |
| 18576 | Mervin Troyer | Union City, PA 16438-8510 | Gas Operator | Dec 2008 |
| 18577 | Mervine Oil Company Inc | Blackwell, OK 74631-0514 | Oil Operator | Jan 2013 |
| 18578 | Merzbacher, George F. Jr. | Robstown, TX 78380 | Oil & Gas Operator | May 1994 |
| 18579 | Mesa Chica Corp. | San Antonio, TX 78278 | Oil & Gas Operator | May 2018 |
| 18580 | Mesa Energy, Inc. | Austin, TX 78755 | Oil & Gas Operator | Dec 2013 |
| 18581 | Mesa Exploration Company Inc | Shawnee, OK 74801 | Oil & Gas Operator | May 2026 |
| 18582 | Mesa Gulf Coast LLC | | Oil & Gas Operator | Dec 2020 |
| 18583 | Mesa Operating Co. | Irving, TX 75039 | Oil & Gas Operator | Aug 1997 |
| 18584 | Mesa Operating L | | Oil & Gas Operator | Dec 1996 |
| 18585 | Mesa Operating LP | Irving, TX 75039-3746 | Oil & Gas Operator | Oct 2010 |
| 18586 | Mesa Operating LTD Partnership | Amarillo, TX 79189 | Oil & Gas Operator | May 1994 |
| 18587 | Mesa Petroleum C | | Oil & Gas Operator | Dec 1986 |
| 18588 | Mesa Petroleum Co. | | Oil & Gas Operator | Aug 1985 |
| 18589 | Mesa Production Company | Amarillo, TX 79189 | Oil & Gas Operator | Dec 1983 |
| 18590 | Mesa Ridge Holdings LLC | Abilene, TX 79603 | Oil Operator | Sep 2026 |
| 18591 | Mesa VIsta Operating, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2026 |
| 18592 | Mescalero Energy, Inc. | San Antonio, TX 78231 | Oil & Gas Operator | Aug 2003 |
| 18593 | Mescko Operating & Prod | Seville, OH 44273 | Oil & Gas Operator | Feb 2026 |
| 18594 | Mescko Producing & Operating Co. Inc. | Burbank, OH 44214 | Oil & Gas Operator | Dec 2025 |
| 18595 | Mesh LTD | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2025 |
| 18596 | Mesquite Land & Minerals Co. | Albany, TX 76430 | Oil Operator | Sep 2026 |
| 18597 | Mesquite Oil & Gas Production | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2026 |
| 18598 | Mesquite SWD Inc | Carlsbad, NM 88221 | Oil & Gas Operator | Sep 2026 |
| 18599 | Messenger Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Apr 2026 |
| 18600 | Messer Helium Cliffside LLC | Bridgewater, NJ 08807 | Gas Operator | Sep 2026 |