| 301 | W F D Oil Corp. | Edmond, OK 73012 | Oil & Gas Operator | Dec 2025 |
| 302 | Wadkins T Roy | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2019 |
| 303 | Walton W W & Beatrice F | Breckenridge, TX 76024 | Gas Operator | Jul 2002 |
| 304 | Walton, W. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 1994 |
| 305 | Waterbridge Arkoma Operating LLC | Houston, TX 77056 | Oil Operator | Oct 2025 |
| 306 | Wentworth Operating Company | Oklahoma City, OK 73162-1863 | Oil & Gas Operator | Dec 2025 |
| 307 | Westamerica Corporation | Dewey, OK 74029-0040 | Oil & Gas Operator | Aug 1999 |
| 308 | Westend Operating LLC | Collinsville, OK 74021 | Oil Operator | Nov 2025 |
| 309 | White Alton L Trust | Nowata, OK 74048 | Oil & Gas Operator | Aug 2013 |
| 310 | White Operating Company | Oklahoma City, OK 73159-7136 | Oil & Gas Operator | Dec 2025 |
| 311 | Wise Oil & Gas Company LLC | Shawnee, OK 74801-8507 | Oil & Gas Operator | Feb 2024 |
| 312 | Woolever Stephen L | Tulsa, OK 74108-2303 | Oil Operator | Jul 2024 |
| 313 | Worstell Oil & Gas Company | Collinsville, OK 74021 | Oil Operator | Nov 2005 |
| 314 | Wyatt'S Oil Corporation | | Oil & Gas Operator | Nov 2025 |
| 315 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | Dec 2025 |
| 316 | Yager Company | Hutchinson, KS 67502 | Oil & Gas Operator | Dec 2000 |
| 317 | Yarhola Production Company | Drumright, OK 74030 | Oil & Gas Operator | Dec 2025 |
| 318 | Yegen E C | Casper, WY 82604 | Oil & Gas Operator | Mar 2015 |
| 319 | Young Stanton L | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 2014 |
| 320 | Zap Oil Company | Nowata, OK 74048-2640 | Oil & Gas Operator | Nov 2005 |