| 33201 | Yost Energy Inc | | Oil & Gas Operator | Mar 2025 |
| 33202 | Yost Oil Operati | | Oil Operator | Jul 1990 |
| 33203 | Yost Oil Operations, Inc. | Russell, KS 67665 | Oil Operator | May 1999 |
| 33204 | Yost Richard D Dba Yost Inc | | Oil Operator | Aug 2024 |
| 33205 | Yost, Barbra E | | Oil Operator | Dec 2018 |
| 33206 | Yost, M. A. | Russell, KS 67665 | Oil Operator | Aug 1990 |
| 33207 | Yotpolis, Joni L. | Clymer, NY 14724 | Gas Operator | Dec 2023 |
| 33208 | Yotpolis, Rosemarie | Clymer, NY 14724 | Gas Operator | Dec 2023 |
| 33209 | Young H Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 1993 |
| 33210 | Young Oil Corporation | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 33211 | Young Petroleum Service, LLC | Wichita, KS 67212 | Oil & Gas Operator | Sep 2023 |
| 33212 | Young Resources, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1999 |
| 33213 | Young Stanton L | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 2014 |
| 33214 | Young Tommy Oil Inc | Woodward, OK 73802-0893 | Oil & Gas Operator | Jan 2025 |
| 33215 | Young Z Joe | Cement, OK 73017-0600 | Oil & Gas Operator | Mar 2015 |
| 33216 | Young Zoral J | Cement, OK 73017 | Oil & Gas Operator | Sep 2000 |
| 33217 | Young, Clint Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 33218 | Young, Harvey L. | Erie, KS 66733 | Oil Operator | Feb 2008 |
| 33219 | Young, John H., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2025 |
| 33220 | Young, L. M. | Brownwood, TX 76804 | Oil & Gas Operator | Aug 2003 |
| 33221 | Young, Marshall R., Oil Co. | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 33222 | Youngberg, Brian Lenn | Forestville, NY 14062 | Gas Operator | Dec 2023 |
| 33223 | Youngblood Enterprises | | Gas Operator | Dec 1983 |
| 33224 | Youngblood Enterprises, Inc. | | Oil & Gas Operator | Jan 1992 |
| 33225 | Youngblood J Lee | Dallas, TX 75221 | Oil & Gas Operator | Feb 1996 |
| 33226 | Youngblood, C. S. III | Pampa, TX 79065 | Oil & Gas Operator | Dec 2001 |
| 33227 | Younger Bernard | | Oil Operator | Nov 1992 |
| 33228 | Younger Energy C | | Oil & Gas Operator | Dec 1996 |
| 33229 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Apr 2025 |
| 33230 | Younger Enterprises Inc | Ada, OK 74821-1882 | Oil Operator | Jan 2003 |
| 33231 | Yount Foundation Inc | | Oil Operator | Dec 2023 |
| 33232 | Yturri, Robert & John | San Antonio, TX 78205 | Oil & Gas Operator | Aug 2003 |
| 33233 | Yturria, Frank D. | Brownsville, TX 78520 | Oil & Gas Operator | Mar 2008 |
| 33234 | Yucca Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 33235 | Yucca Petroleum | | Gas Operator | Jan 1994 |
| 33236 | Yukon Exploration Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Apr 2025 |
| 33237 | Yukon Properties LLC | Villa Park, CA 92861 | Oil & Gas Operator | Sep 2017 |
| 33238 | Yuma E & P Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2025 |
| 33239 | Yuma Oil Company | El Dorado, KS 67042 | Oil Operator | Apr 1993 |
| 33240 | Yuma Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Aug 2002 |
| 33241 | Yunker Oil Co. | | Oil & Gas Operator | Dec 1986 |
| 33242 | Yust, C. F. & R. L. | Batson, TX 77519 | Oil & Gas Operator | Sep 2002 |
| 33243 | Z & L Oil LLC | Longton, KS 67352 | Oil Operator | Dec 2024 |
| 33244 | Z & S Construction Co Inc | Kimball, NE 69145 | Oil & Gas Operator | Mar 2025 |
| 33245 | Z C Ambrose-G L Blaxton, Jr. | | Oil & Gas Operator | Apr 1983 |
| 33246 | Z G Operating LLC | Oklahoma City, OK 73134-5038 | Oil & Gas Operator | Nov 2009 |
| 33247 | Z G Exploration Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2005 |
| 33248 | Z&G Operating | Wichita Falls, TX 76302 | Oil Operator | Sep 2011 |
| 33249 | Z/F Little Buddy, L.P. | Tyler, TX 75710 | Oil & Gas Operator | Sep 2000 |
| 33250 | Zachary Oil Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2023 |
| 33251 | Zachris, Inc. | Mansfield, TX 76063 | Oil Operator | Oct 2021 |
| 33252 | Zachry Exploration, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Apr 2025 |
| 33253 | Zachry Exploration, LLC | San Antonio, TX 78224 | Oil & Gas Operator | Apr 2025 |
| 33254 | Zachry Exploration, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Jan 2009 |
| 33255 | Zachry Oil And Gas Properties | Midland, TX 79708 | Oil & Gas Operator | Apr 2025 |
| 33256 | Zachry Operating | Midland, TX 79708 | Oil & Gas Operator | Jan 2011 |
| 33257 | Zachry, H. B. Company | San Antonio, TX 78205 | Oil & Gas Operator | Apr 1994 |
| 33258 | Zackson Resources, Inc. | Houston, TX 77063 | Oil & Gas Operator | Apr 2025 |
| 33259 | Zad, Inc. | | Oil Operator | May 2001 |
| 33260 | Zadeck Energy Group | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2011 |
| 33261 | Zadeck Energy Group Inc | | Oil & Gas Operator | Dec 2011 |
| 33262 | Zaf Oil | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2002 |
| 33263 | Zafar Oil & Gas, Inc. | Oklahoma City, OK 73132 | Oil Operator | Aug 2013 |
| 33264 | Zagava, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 33265 | Zajac Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Apr 2025 |
| 33266 | Zam'S Production Company | | Oil Operator | Sep 2004 |
| 33267 | Zama Petro Inc | Clinton, WA 98236-0100 | Oil & Gas Operator | Dec 2024 |
| 33268 | Zap Oil Company | Nowata, OK 74048-2640 | Oil & Gas Operator | Nov 2005 |
| 33269 | Zapata-Fender, L. L. C. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2001 |
| 33270 | Zargon Oil (ND) Inc. | | Oil & Gas Operator | Mar 2025 |
| 33271 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 33272 | Zavala Independent Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2007 |
| 33273 | Zavanna Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2025 |
| 33274 | Zavanna, LLC | | Oil & Gas Operator | Feb 2025 |
| 33275 | Zaveri Oil & Gas LTD | Albany, KY 42602 | Oil Operator | Dec 2006 |
| 33276 | Zaza Energy, LLC | Houston, TX 77010 | Oil & Gas Operator | Apr 2025 |
| 33277 | Zca Gas Gathering Co., Inc. | Bartlesville, OK 74003 | Oil & Gas Operator | Apr 2020 |
| 33278 | Zeagler Enterprises, Inc. | | Oil & Gas Operator | Jun 2008 |
| 33279 | Zeal Production Company | Sperry, OK 74073-4714 | Oil & Gas Operator | Feb 2025 |
| 33280 | Zebra Oil And Gas | Lubbock, TX 79423 | Oil & Gas Operator | Aug 2002 |
| 33281 | Zebra Oil Company | El Campo, TX 77437 | Oil & Gas Operator | Apr 2025 |
| 33282 | Zeiders Bros Oil & Gas Co LLC | Edmond, OK 73003 | Oil & Gas Operator | Jan 2025 |
| 33283 | Zeit Exploration Co., Inc. | | Oil & Gas Operator | May 1994 |
| 33284 | Zelaya Oil And Gas, LLC | Premont, TX 78375 | Oil & Gas Operator | Apr 2025 |
| 33285 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2025 |
| 33286 | Zenergy Operating Co. | | Oil & Gas Operator | Sep 2023 |
| 33287 | Zenergy Operating Company, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2016 |
| 33288 | Zenith Drilling | | Oil & Gas Operator | Aug 1995 |
| 33289 | Zenith Drilling Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
| 33290 | Zenith Exploration Co Inc | Washington, PA 15301 | Oil & Gas Operator | Dec 2014 |
| 33291 | Zenith Oil & Gas Inc | MT Gilead, OH 43338 | Oil & Gas Operator | Dec 1999 |
| 33292 | Zenith Oil & Gas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2025 |
| 33293 | Zenithal LLC | Isonville, KY 41149 | Oil & Gas Operator | Dec 2023 |
| 33294 | Zephyr Lone Star Oper Co.,L.L.C. | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2025 |
| 33295 | Zephyr Operating Co LLC | Oklahoma City, OK 73118-6035 | Oil & Gas Operator | Feb 2025 |
| 33296 | Zephyr SWD LLC | Oklahoma City, OK 73118-6035 | Oil Operator | Jan 2025 |
| 33297 | Zerbst James E | | Oil & Gas Operator | Apr 2007 |
| 33298 | Zercon Oil & Gas, Inc. | | Oil Operator | Oct 2003 |
| 33299 | Zero Mass Mining, LLC | | Oil Operator | Jan 2025 |
| 33300 | Zeta Energy LLC | Ashland, OR 97520 | Oil Operator | Dec 2024 |