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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Wapiti Operating LLC | Colorado | 0 BBLs | 226,746 MCF | Jun 1999 - Sep 2025 |
| Wapiti Operating LLC | Wyoming | 19 BBLs | 23,255 MCF | Apr 2018 - Sep 2025 |
| Warhorse Petroleum Inc | Kansas | 3,529 BBLs | 0 MCF | Jan 2010 - Jun 2025 |
| Warrior Met Coal Gas, LLC | Alabama | 0 BBLs | 403,523 MCF | Sep 1984 - Sep 2025 |
| Weigel Oil Company, LLC | Kansas | 1,538 BBLs | 0 MCF | Feb 1980 - Jun 2025 |
| Wem Operating, LLC | Utah | 164,532 BBLs | 367,650 MCF | Dec 2023 - Sep 2025 |
| Wesco Operating Inc | Wyoming | 28,942 BBLs | 78,353 MCF | Jan 1991 - Sep 2025 |
| Wesco Operating, Inc | Utah | 9,635 BBLs | 93,427 MCF | Mar 2016 - Sep 2025 |
| Wesco Operating, Inc. | Montana | 5,989 BBLs | 3,138 MCF | Jun 1999 - Sep 2025 |
| Wesco Operating, Inc. | North Dakota | 6,711 BBLs | 5,659 MCF | Aug 1987 - Sep 2025 |
| Wexpro Company | Utah | 10,556 BBLs | 273,843 MCF | Jan 1971 - Sep 2025 |
| Wexpro II Company | Wyoming | 992 BBLs | 458,356 MCF | Mar 2017 - Sep 2025 |
| Wgo Resources, LLC | North Dakota | 7,761 BBLs | 4,479 MCF | Nov 2024 - Sep 2025 |
| Whisler Enterprise Company | Wyoming | 1,691 BBLs | 0 MCF | May 2021 - Sep 2025 |
| White & Ellis Drilling, Inc. | Kansas | 1,648 BBLs | 1,291 MCF | Jan 1980 - Jun 2025 |
| White Butte Oil Operations, LLC | North Dakota | 6,893 BBLs | 46,093 MCF | Apr 2015 - Sep 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 | 10,960 BBLs | 7,053 MCF | Sep 2022 - Oct 2025 |
| White Rock Oil & Gas, LLC | Montana | 111,060 BBLs | 120,123 MCF | Jan 2015 - Sep 2025 |
| White Rock Oil & Gas, LLC | North Dakota | 84,274 BBLs | 82,973 MCF | Sep 2015 - Sep 2025 |
| Whiting Oil And Gas Corporation | Montana | 31,836 BBLs | 45,469 MCF | Oct 2003 - Sep 2025 |
| Whiting Oil And Gas Corporation | North Dakota | 1,454,829 BBLs | 6,516,285 MCF | Jun 2002 - Sep 2025 |
| Whitney Oil & Gas, LLC | Louisiana | 28,298 BBLs | 26,495 MCF | Jul 2015 - Jan 2025 |
| Wiepking-Fullerton Energy LLC | Colorado | 6,427 BBLs | 4,742 MCF | Jan 1999 - Sep 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 | 1,133 BBLs | 9,919 MCF | Jul 2017 - Sep 2025 |
| Wolverine Gas & Oil Company Of Utah, LLC | Utah | 81,297 BBLs | 38,508 MCF | May 2004 - Sep 2025 |
| WPX Energy Permian, LLC | New Mexico | 242,950 BBLs | 1,363,007 MCF | Jan 2007 - Sep 2025 |
| WPX Energy Rocky Mountain LLC | Colorado | 49,949 BBLs | 15,394,678 MCF | Jan 1999 - Oct 2025 |
| WPX Energy Williston, LLC | North Dakota | 1,069,352 BBLs | 3,836,321 MCF | Apr 2011 - Sep 2025 |
| WRC Energy LLC | Wyoming | 302,787 BBLs | 1,023,030 MCF | Aug 2018 - Sep 2025 |
| XCL Assetco, LLC | Utah | 561,336 BBLs | 594,724 MCF | Feb 2020 - Sep 2025 |
| XTO Energy Inc | North Dakota | 1,434,327 BBLs | 5,239,082 MCF | Jun 2007 - Sep 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 | 1,709,854 BBLs | 9,926,182 MCF | Jan 1993 - Sep 2025 |
| XTO Permian Operating LLC. | New Mexico | 6,062,455 BBLs | 26,223,016 MCF | May 2019 - Sep 2025 |
| Yates Industries LLC | New Mexico | 1,906 BBLs | 970 MCF | Sep 2021 - Oct 2025 |
| Yellow Creek Operating, LLC | Mississippi | 1,417 BBLs | 0 MCF | Dec 1976 - Aug 2025 |
| Yost Energy Inc | Michigan | 1,243 BBLs | 0 MCF | Jan 1984 - Sep 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 | 6,425 BBLs | 243 MCF | Jul 2002 - Sep 2025 |
| Zarvona Energy LLC | Louisiana | 6,049 BBLs | 40,890 MCF | Apr 2016 - Jan 2025 |
| Zavanna, LLC | North Dakota | 368,165 BBLs | 908,081 MCF | Apr 2007 - Sep 2025 |
| Zenith Drilling Corporation | Kansas | 2,090 BBLs | 740 MCF | Jan 1980 - Jun 2025 |