| 4901 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 4902 | Witt Oil Production, Inc | | Oil & Gas Operator | Feb 2024 |
| 4903 | Wle, Inc. | | Oil & Gas Operator | Feb 2012 |
| 4904 | WLS Corporation | | Oil Operator | Aug 2009 |
| 4905 | WM B Hill Production Co | | Oil Operator | Jun 1991 |
| 4906 | WM. H. Kenny Consultants, LTD. | | Oil & Gas Operator | Nov 1991 |
| 4907 | WM. Herbert Hunt TR.Est. | | Oil & Gas Operator | Oct 1992 |
| 4908 | WM. Inabnet | | Gas Operator | Dec 2023 |
| 4909 | WM. T. Burton Industries, Inc. | | Oil & Gas Operator | Apr 1988 |
| 4910 | WM. Zuhone, Jr. | | Oil & Gas Operator | Aug 1988 |
| 4911 | WNR Enterprises', Inc. | | Oil & Gas Operator | Feb 1997 |
| 4912 | Woco La, LLC | | Oil Operator | Jan 2024 |
| 4913 | Wolfe Oil | Bremen, OH 43107 | Oil Operator | Dec 2023 |
| 4914 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 4915 | Womack & Nelson | | Gas Operator | Feb 1987 |
| 4916 | Womack & Price | | Oil & Gas Operator | Oct 1990 |
| 4917 | Womack Prod Co. | | Oil Operator | Feb 1996 |
| 4918 | Wood Energy Corporation | Baytown, TX 77520 | Oil & Gas Operator | Jun 1999 |
| 4919 | Woodall Oil Company | | Oil Operator | Sep 2010 |
| 4920 | Woodbine Petroleum, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Aug 2003 |
| 4921 | Woodbine Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 4922 | Woodlawn Energy Dev., L.L.C. | | Oil & Gas Operator | Aug 2006 |
| 4923 | Woodpecker Corp. | | Oil & Gas Operator | Dec 2023 |
| 4924 | Woods & Deas | | Oil & Gas Operator | Jan 1984 |
| 4925 | Woods & Deas-Dobie | | Oil & Gas Operator | Aug 1983 |
| 4926 | Woods Operating Co., Inc. | Shreveport, LA 71136 | Oil & Gas Operator | Dec 2020 |
| 4927 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 4928 | Woods, Et Al | | Gas Operator | Sep 1990 |
| 4929 | Wooldridge Land & Cattle, LLC | | Oil Operator | Jan 2024 |
| 4930 | Wooldridge Production Co.,LTD. | | Oil & Gas Operator | Apr 2008 |
| 4931 | Wooldridge Production, L.L.C. | | Oil Operator | Mar 2005 |
| 4932 | Woolf & Magee, Inc. | | Oil & Gas Operator | Oct 1991 |
| 4933 | Workover One, Inc. | | Oil & Gas Operator | Jul 1989 |
| 4934 | World Producers, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1994 |
| 4935 | Worldwide Energy Corp. | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |
| 4936 | Wright Production Company | | Oil Operator | Jun 1990 |
| 4937 | WRT Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | May 1998 |
| 4938 | WSF, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2013 |
| 4939 | Wylee Petroleum Corporation | | Oil & Gas Operator | Dec 1984 |
| 4940 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 4941 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 4942 | Wytex Production Corporation | Fort Smith, AR 72903 | Oil & Gas Operator | Jan 2020 |
| 4943 | XCL-Louisiana, Inc. | | Oil & Gas Operator | Aug 1993 |
| 4944 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 4945 | Xplor Energy Operating Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 2012 |
| 4946 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 4947 | Xtra Energy Corporation | | Oil & Gas Operator | Jun 1989 |
| 4948 | Yasny Corporation | | Oil Operator | Nov 1991 |
| 4949 | Yates Oil Company | | Oil Operator | Jul 1990 |
| 4950 | Yellow Dog Oil Company | | Oil Operator | Apr 1988 |
| 4951 | Yellow Rock, LLC | | Oil & Gas Operator | Dec 2023 |
| 4952 | Yentzen Investments, Inc. | Sugar Land, TX 77478 | Oil Operator | May 1993 |
| 4953 | Yentzen Production, Inc. | | Oil Operator | Mar 1987 |
| 4954 | Youngblood Enterprises, Inc. | | Oil & Gas Operator | Jan 1992 |
| 4955 | Yuma E & P Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2024 |
| 4956 | Yuma Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Aug 2002 |
| 4957 | Z C Ambrose-G L Blaxton, Jr. | | Oil & Gas Operator | Mar 1980 |
| 4958 | Zachry Exploration, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Apr 2024 |
| 4959 | Zachry Exploration, LLC | San Antonio, TX 78224 | Oil & Gas Operator | Apr 2024 |
| 4960 | Zachry Exploration, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Jan 2009 |
| 4961 | Zad, Inc. | | Oil Operator | May 2001 |
| 4962 | Zadeck Energy Group Inc | | Oil & Gas Operator | Jun 2013 |
| 4963 | Zam'S Production Company | | Oil Operator | Sep 2004 |
| 4964 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 4965 | Zeagler Enterprises, Inc. | Shreveport, LA 71115 | Oil & Gas Operator | Mar 2009 |
| 4966 | Zeit Exploration Co., Inc. | | Oil & Gas Operator | May 1994 |
| 4967 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2024 |
| 4968 | Zenergy Operating Company, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2016 |
| 4969 | Zercon Oil & Gas, Inc. | | Oil Operator | Oct 2003 |
| 4970 | Zero Mass Mining, LLC | | Oil Operator | Jan 2024 |
| 4971 | Zgen, Inc. | | Oil & Gas Operator | Jul 1990 |
| 4972 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |
| 4973 | Zinke & Trumbo, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2007 |
| 4974 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |
| 4975 | Zone Energy, LLC | Houston, TX 77251 | Oil & Gas Operator | Dec 2023 |