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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Weigel Oil Company, LLC | Kansas | 1,538 BBLs | 0 MCF | Feb 1980 - Jun 2025 |
| Wem Operating, LLC | Utah | 343,005 BBLs | 422,641 MCF | Dec 2023 - Jul 2025 |
| Wesco Operating Inc | Wyoming | 29,523 BBLs | 78,825 MCF | Jan 1991 - Aug 2025 |
| Wesco Operating, Inc | Utah | 8,213 BBLs | 30,614 MCF | Mar 2016 - Aug 2025 |
| Wesco Operating, Inc. | Montana | 6,001 BBLs | 2,984 MCF | Jun 1999 - Jul 2025 |
| Wesco Operating, Inc. | North Dakota | 7,511 BBLs | 6,537 MCF | Aug 1987 - Aug 2025 |
| West Bay Exploration Company | Michigan | 29,453 BBLs | 38,129 MCF | Jul 1982 - Jul 2025 |
| Western Operating Company | Colorado | 5,598 BBLs | 398 MCF | Jan 1999 - Jul 2025 |
| Wexpro Company | Colorado | 1,716 BBLs | 265,190 MCF | Jan 1999 - Jul 2025 |
| Wexpro Company | Utah | 502 BBLs | 148,809 MCF | Jan 1971 - Jul 2025 |
| Wexpro Company | Wyoming | 6,756 BBLs | 2,812,305 MCF | Jan 1978 - Jul 2025 |
| Wexpro II Company | Wyoming | 1,099 BBLs | 480,388 MCF | Mar 2017 - Jul 2025 |
| Wgo Resources, LLC | North Dakota | 9,105 BBLs | 5,052 MCF | Nov 2024 - Aug 2025 |
| Whisler Enterprise Company | Wyoming | 1,642 BBLs | 0 MCF | May 2021 - Aug 2025 |
| White & Ellis Drilling, Inc. | Kansas | 1,648 BBLs | 1,291 MCF | Jan 1980 - Jun 2025 |
| White Butte Oil Operations, LLC | North Dakota | 8,601 BBLs | 43,542 MCF | Apr 2015 - Aug 2025 |
| White Exploration, Inc. | Kansas | 2,477 BBLs | 14,648 MCF | Apr 1983 - Jun 2025 |
| White Hawk Oil Company, LLP | Kansas | 2,857 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| White Pine Production LLC | Michigan | 11,541 BBLs | 9,166 MCF | Sep 2022 - Aug 2025 |
| White Rock Oil & Gas, LLC | Montana | 121,691 BBLs | 122,224 MCF | Jan 2015 - Jul 2025 |
| White Rock Oil & Gas, LLC | North Dakota | 85,089 BBLs | 80,811 MCF | Sep 2015 - Aug 2025 |
| Whiting Oil And Gas Corporation | Montana | 36,949 BBLs | 53,323 MCF | Oct 2003 - Jul 2025 |
| Whiting Oil And Gas Corporation | North Dakota | 1,516,400 BBLs | 7,028,337 MCF | Jun 2002 - Aug 2025 |
| Whitney Oil & Gas, LLC | Louisiana | 28,298 BBLs | 26,495 MCF | Jul 2015 - Jan 2025 |
| Wiepking-Fullerton Energy LLC | Colorado | 6,054 BBLs | 4,110 MCF | Jan 1999 - Jul 2025 |
| Wilcox Energy Company | Louisiana | 9,355 BBLs | 0 MCF | Nov 1984 - Dec 2024 |
| Wilton Petroleum, Inc. | Kansas | 2,271 BBLs | 1,866 MCF | Jan 1980 - Jun 2025 |
| Windham Oil Corp. | Louisiana | 4,053 BBLs | 0 MCF | Jul 1996 - Dec 2024 |
| Windridge Operating LLC | North Dakota | 1,243 BBLs | 11,067 MCF | Jul 2017 - Aug 2025 |
| Wolverine Gas & Oil Company Of Utah, LLC | Utah | 85,634 BBLs | 40,356 MCF | May 2004 - Aug 2025 |
| Wolverine Gas And Oil Company Of Michigan LLC | Michigan | 36,437 BBLs | 0 MCF | Oct 2016 - Jul 2025 |
| WPX Energy Permian, LLC | New Mexico | 182,669 BBLs | 1,135,624 MCF | Jan 2007 - Aug 2025 |
| WPX Energy Rocky Mountain LLC | Colorado | 48,164 BBLs | 15,697,161 MCF | May 2001 - Jul 2025 |
| WPX Energy Williston, LLC | North Dakota | 1,116,521 BBLs | 3,974,504 MCF | Apr 2011 - Aug 2025 |
| WRC Energy LLC | Wyoming | 425,256 BBLs | 1,231,594 MCF | Aug 2018 - Jul 2025 |
| Wyoil Corp | Wyoming | 1,572 BBLs | 0 MCF | Jan 1982 - Aug 2025 |
| XCL Assetco, LLC | Utah | 491,680 BBLs | 522,214 MCF | Feb 2020 - Jul 2025 |
| XTO Energy Inc | North Dakota | 1,482,736 BBLs | 5,456,517 MCF | Jun 2007 - Aug 2025 |
| XTO Energy Inc. | Kansas | 366 BBLs | 63,728 MCF | Jan 1980 - Jun 2025 |
| XTO Energy Inc. | Louisiana | 50,026 BBLs | 942,997 MCF | Jun 2001 - Dec 2024 |
| XTO Energy, Inc | New Mexico | 2,011,185 BBLs | 10,435,789 MCF | Jan 1993 - Jul 2025 |
| XTO Permian Operating LLC. | New Mexico | 4,667,659 BBLs | 22,185,930 MCF | May 2019 - Jul 2025 |
| Yates Industries LLC | New Mexico | 1,985 BBLs | 1,040 MCF | Sep 2021 - Aug 2025 |
| Younger Energy Company | Kansas | 2,198 BBLs | 1,483 MCF | Jan 1980 - Jun 2025 |
| Z & L Oil LLC | Kansas | 2,130 BBLs | 0 MCF | Jan 2010 - Jun 2025 |
| Zachry Exploration, LLC | Louisiana | 13,515 BBLs | 84,415 MCF | Jan 2010 - Dec 2024 |
| Zargon Oil (ND) Inc. | North Dakota | 6,974 BBLs | 269 MCF | Jul 2002 - Aug 2025 |
| Zarvona Energy LLC | Louisiana | 6,049 BBLs | 40,890 MCF | Apr 2016 - Jan 2025 |
| Zavanna, LLC | North Dakota | 182,599 BBLs | 662,900 MCF | Apr 2007 - Aug 2025 |
| Zenith Drilling Corporation | Kansas | 2,090 BBLs | 740 MCF | Jan 1980 - Jun 2025 |