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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Warren American Oil Co | New Mexico | 1,002 BBLs | 1,765 MCF | Sep 2000 - Mar 2026 |
| Warrior Met Coal Gas, LLC | Alabama | 0 BBLs | 340,854 MCF | Sep 1984 - Mar 2026 |
| Wave Petroleum Operating LLC | Wyoming | 1,149 BBLs | 665 MCF | Dec 2014 - Mar 2026 |
| Webco Oil Company, Inc. | Kansas | 1,172 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Weigel Oil Company, LLC | Kansas | 2,192 BBLs | 0 MCF | Feb 1980 - Jan 2026 |
| Wem Operating, LLC | Utah | 224,486 BBLs | 507,718 MCF | Dec 2023 - Mar 2026 |
| Wesco Operating, Inc | Utah | 8,169 BBLs | 94,248 MCF | Mar 2016 - Mar 2026 |
| Wesco Operating, Inc. | Montana | 5,702 BBLs | 2,875 MCF | Jun 1999 - Mar 2026 |
| Wesco Operating, Inc. | North Dakota | 7,989 BBLs | 6,414 MCF | Aug 1987 - Apr 2026 |
| West Bay Exploration Company | Michigan | 28,224 BBLs | 34,998 MCF | Jul 1982 - Mar 2026 |
| Wexpro Company | Colorado | 1,778 BBLs | 249,261 MCF | Jan 1999 - Feb 2026 |
| Wexpro Company | Utah | 6,170 BBLs | 209,698 MCF | Jan 1971 - Mar 2026 |
| Wexpro Company | Wyoming | 10,159 BBLs | 2,945,892 MCF | Jan 1978 - Mar 2026 |
| Wexpro II Company | Wyoming | 1,029 BBLs | 351,633 MCF | Mar 2017 - Mar 2026 |
| Wgo Resources, LLC | North Dakota | 11,974 BBLs | 6,985 MCF | Nov 2024 - Apr 2026 |
| Whisler Enterprise Company | Wyoming | 1,675 BBLs | 0 MCF | May 2021 - Mar 2026 |
| Whitco Petroleum, LP | Kansas | 954 BBLs | 737 MCF | Nov 1992 - Jan 2026 |
| White & Ellis Drilling, Inc. | Kansas | 1,281 BBLs | 1,519 MCF | Jan 1980 - Jan 2026 |
| White Butte Oil Operations, LLC | North Dakota | 7,792 BBLs | 52,040 MCF | Apr 2015 - Mar 2026 |
| White Exploration, Inc. | Kansas | 3,025 BBLs | 12,456 MCF | Apr 1983 - Jan 2026 |
| White Hawk Oil Company, LLP | Kansas | 3,469 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| White Rock Oil & Gas, LLC | Montana | 200,979 BBLs | 175,114 MCF | Jan 2015 - Mar 2026 |
| White Rock Oil & Gas, LLC | North Dakota | 78,376 BBLs | 65,785 MCF | Sep 2015 - Mar 2026 |
| Whitetail Crude, Inc | Kansas | 1,146 BBLs | 62 MCF | Jan 1980 - Jan 2026 |
| Whiting Oil And Gas Corporation | Montana | 33,831 BBLs | 43,664 MCF | Oct 2003 - Mar 2026 |
| Whiting Oil And Gas Corporation | North Dakota | 1,437,271 BBLs | 6,128,993 MCF | Jun 2002 - Mar 2026 |
| Whitney Oil & Gas, LLC | Louisiana | 28,298 BBLs | 26,495 MCF | Jul 2015 - Jan 2025 |
| Wiepking-Fullerton Energy LLC | Colorado | 5,453 BBLs | 2,844 MCF | Jan 1999 - Feb 2026 |
| Wilcox Energy Company | Louisiana | 9,355 BBLs | 0 MCF | Nov 1984 - Dec 2024 |
| Wilton Petroleum, Inc. | Kansas | 1,254 BBLs | 1,258 MCF | Jan 1980 - Jan 2026 |
| Windham Oil Corp. | Louisiana | 4,053 BBLs | 0 MCF | Jul 1996 - Dec 2024 |
| Windridge Operating LLC | North Dakota | 887 BBLs | 7,125 MCF | Jul 2017 - Mar 2026 |
| Wolverine Gas And Oil Company Of Michigan LLC | Michigan | 35,398 BBLs | 0 MCF | Oct 2016 - Mar 2026 |
| WPX Energy Permian, LLC | New Mexico | 647,058 BBLs | 2,859,259 MCF | Jan 2007 - Mar 2026 |
| WPX Energy Rocky Mountain LLC | Colorado | 35,817 BBLs | 14,180,426 MCF | Jan 1999 - Feb 2026 |
| WRC Energy LLC | Wyoming | 523,749 BBLs | 1,511,655 MCF | Aug 2018 - Mar 2026 |
| Wy Basin Operating LLC | Montana | 2,200 BBLs | 168 MCF | Oct 2024 - Mar 2026 |
| XTO Energy Inc | North Dakota | 1,773,969 BBLs | 5,481,307 MCF | Jun 2007 - Mar 2026 |
| XTO Energy Inc. | Kansas | 194 BBLs | 58,291 MCF | Jan 1980 - Jan 2026 |
| XTO Energy Inc. | Louisiana | 50,026 BBLs | 942,997 MCF | Jun 2001 - Dec 2024 |
| XTO Energy, Inc | New Mexico | 1,185,591 BBLs | 7,834,392 MCF | Jan 1993 - Mar 2026 |
| XTO Permian Operating LLC. | New Mexico | 7,788,635 BBLs | 33,291,696 MCF | May 2019 - Mar 2026 |
| Yates Industries LLC | New Mexico | 1,941 BBLs | 950 MCF | Sep 2021 - Mar 2026 |
| Younger Energy Company | Kansas | 3,073 BBLs | 1,059 MCF | Jan 1980 - Jan 2026 |
| Z & L Oil LLC | Kansas | 1,873 BBLs | 0 MCF | Jan 2010 - Jan 2026 |
| Zachry Exploration, LLC | Louisiana | 13,515 BBLs | 84,415 MCF | Jan 2010 - Dec 2024 |
| Zargon Oil (ND) Inc. | North Dakota | 8,509 BBLs | 300 MCF | Jul 2002 - Mar 2026 |
| Zarvona Energy LLC | Louisiana | 6,049 BBLs | 40,890 MCF | Apr 2016 - Jan 2025 |
| Zavanna Energy Operating, LLC | North Dakota | 225,632 BBLs | 818,877 MCF | Apr 2025 - Mar 2026 |
| Zenith Drilling Corporation | Kansas | 1,929 BBLs | 225 MCF | Jan 1980 - Jan 2026 |