| 201 | Woodlawn Energy Dev., L.L.C. | | Oil & Gas Operator | Aug 2006 |
| 202 | Woodpecker Corp. | | Oil & Gas Operator | Jun 2024 |
| 203 | Woods & Deas | | Oil & Gas Operator | Jan 1984 |
| 204 | Woods & Deas-Dobie | | Oil & Gas Operator | Aug 1983 |
| 205 | Woods Operating Co., Inc. | Shreveport, LA 71136 | Oil & Gas Operator | Dec 2020 |
| 206 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 207 | Woods, Et Al | | Gas Operator | Sep 1990 |
| 208 | Wooldridge Land & Cattle, LLC | | Oil Operator | Jul 2024 |
| 209 | Wooldridge Production Co.,LTD. | | Oil & Gas Operator | Apr 2008 |
| 210 | Wooldridge Production, L.L.C. | | Oil Operator | Mar 2005 |
| 211 | Woolf & Magee, Inc. | | Oil & Gas Operator | Oct 1991 |
| 212 | Workover One, Inc. | | Oil & Gas Operator | Jul 1989 |
| 213 | World Oil & Gas Expl., Inc. | | Oil & Gas Operator | Mar 1988 |
| 214 | World Producers, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1994 |
| 215 | Worldwide Energy Corp. | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |
| 216 | Wright Production Company | | Oil Operator | Jun 1990 |
| 217 | WRT Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | May 1998 |
| 218 | WSF, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2013 |
| 219 | Wylee Petroleum Corporation | | Oil & Gas Operator | Dec 1984 |
| 220 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 221 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Feb 2025 |
| 222 | Wytex Production Corporation | Fort Smith, AR 72903 | Oil & Gas Operator | Jan 2020 |