| 901 | Western Oil Independent LLC | | Oil & Gas Operator | Dec 2016 |
| 902 | Western States International Inc. | | Oil & Gas Operator | Nov 2023 |
| 903 | Westside Farming Co. Inc. | | Gas Operator | Dec 1995 |
| 904 | Whisler Enterprise Company | Erie, CO 80516 | Oil & Gas Operator | Mar 2024 |
| 905 | White Knight Production LLC | Lafayette, LA 70505 | Oil & Gas Operator | Apr 2024 |
| 906 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 907 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Feb 2024 |
| 908 | Wilco-Placentia Oil Operator LLC | | Oil & Gas Operator | Dec 2023 |
| 909 | Wild Goose Storage LLC | | Gas Operator | Dec 2023 |
| 910 | William H. Fisk | | Gas Operator | Dec 2023 |
| 911 | William K. Barker & Associates | | Oil & Gas Operator | Dec 1986 |
| 912 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 913 | Windrush Operating Co., L.L.C. | Longville, LA 70652 | Oil & Gas Operator | Apr 2024 |
| 914 | WM. H. Brayton Trust | | Oil & Gas Operator | Dec 2000 |
| 915 | Woodward Petroleum | | Oil & Gas Operator | Dec 2003 |
| 916 | Worldwide Energy Corp. | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |
| 917 | Yoelin Family Trust | | Oil & Gas Operator | Dec 2023 |
| 918 | Yunker Oil Co. | | Oil & Gas Operator | Dec 1986 |
| 919 | Zonal Holding Corp. | | Oil Operator | Dec 1998 |
| 920 | Zynergy LLC | | Oil Operator | Nov 2023 |