| 33201 | Young Tommy Oil Inc | Woodward, OK 73802-0893 | Oil & Gas Operator | Jan 2025 |
| 33202 | Young Z Joe | Cement, OK 73017-0600 | Oil & Gas Operator | Mar 2015 |
| 33203 | Young Zoral J | Cement, OK 73017 | Oil & Gas Operator | Sep 2000 |
| 33204 | Young, Clint Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 33205 | Young, Harvey L. | Erie, KS 66733 | Oil Operator | Feb 2008 |
| 33206 | Young, John H., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2025 |
| 33207 | Young, L. M. | Brownwood, TX 76804 | Oil & Gas Operator | Aug 2003 |
| 33208 | Young, Marshall R., Oil Co. | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 33209 | Youngberg, Brian Lenn | Forestville, NY 14062 | Gas Operator | Dec 2023 |
| 33210 | Youngblood Enterprises | | Gas Operator | Dec 1983 |
| 33211 | Youngblood Enterprises, Inc. | | Oil & Gas Operator | Jan 1992 |
| 33212 | Youngblood J Lee | Dallas, TX 75221 | Oil & Gas Operator | Feb 1996 |
| 33213 | Youngblood, C. S. III | Pampa, TX 79065 | Oil & Gas Operator | Dec 2001 |
| 33214 | Younger Bernard | | Oil Operator | Nov 1992 |
| 33215 | Younger Energy C | | Oil & Gas Operator | Dec 1996 |
| 33216 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Apr 2025 |
| 33217 | Younger Enterprises Inc | Ada, OK 74821-1882 | Oil Operator | Jan 2003 |
| 33218 | Yount Foundation Inc | | Oil Operator | Dec 2023 |
| 33219 | Yturri, Robert & John | San Antonio, TX 78205 | Oil & Gas Operator | Aug 2003 |
| 33220 | Yturria, Frank D. | Brownsville, TX 78520 | Oil & Gas Operator | Mar 2008 |
| 33221 | Yucca Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 33222 | Yucca Petroleum | | Gas Operator | Jan 1994 |
| 33223 | Yukon Exploration Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Apr 2025 |
| 33224 | Yukon Properties LLC | Villa Park, CA 92861 | Oil & Gas Operator | Sep 2017 |
| 33225 | Yuma E & P Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2025 |
| 33226 | Yuma Oil Company | El Dorado, KS 67042 | Oil Operator | Apr 1993 |
| 33227 | Yuma Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Aug 2002 |
| 33228 | Yunker Oil Co. | | Oil & Gas Operator | Dec 1986 |
| 33229 | Yust, C. F. & R. L. | Batson, TX 77519 | Oil & Gas Operator | Sep 2002 |
| 33230 | Z & L Oil LLC | Longton, KS 67352 | Oil Operator | Dec 2024 |
| 33231 | Z & S Construction Co Inc | Kimball, NE 69145 | Oil & Gas Operator | Mar 2025 |
| 33232 | Z C Ambrose-G L Blaxton, Jr. | | Oil & Gas Operator | Apr 1983 |
| 33233 | Z G Operating LLC | Oklahoma City, OK 73134-5038 | Oil & Gas Operator | Nov 2009 |
| 33234 | Z G Exploration Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2005 |
| 33235 | Z&G Operating | Wichita Falls, TX 76302 | Oil Operator | Sep 2011 |
| 33236 | Z/F Little Buddy, L.P. | Tyler, TX 75710 | Oil & Gas Operator | Sep 2000 |
| 33237 | Zachary Oil Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2023 |
| 33238 | Zachris, Inc. | Mansfield, TX 76063 | Oil Operator | Oct 2021 |
| 33239 | Zachry Exploration, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Apr 2025 |
| 33240 | Zachry Exploration, LLC | San Antonio, TX 78224 | Oil & Gas Operator | Apr 2025 |
| 33241 | Zachry Exploration, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Jan 2009 |
| 33242 | Zachry Oil And Gas Properties | Midland, TX 79708 | Oil & Gas Operator | Apr 2025 |
| 33243 | Zachry Operating | Midland, TX 79708 | Oil & Gas Operator | Jan 2011 |
| 33244 | Zachry, H. B. Company | San Antonio, TX 78205 | Oil & Gas Operator | Apr 1994 |
| 33245 | Zackson Resources, Inc. | Houston, TX 77063 | Oil & Gas Operator | Apr 2025 |
| 33246 | Zad, Inc. | | Oil Operator | May 2001 |
| 33247 | Zadeck Energy Group | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2011 |
| 33248 | Zadeck Energy Group Inc | | Oil & Gas Operator | Dec 2011 |
| 33249 | Zaf Oil | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2002 |
| 33250 | Zafar Oil & Gas, Inc. | Oklahoma City, OK 73132 | Oil Operator | Aug 2013 |
| 33251 | Zagava, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 33252 | Zajac Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Apr 2025 |
| 33253 | Zam'S Production Company | | Oil Operator | Sep 2004 |
| 33254 | Zama Petro Inc | Clinton, WA 98236-0100 | Oil & Gas Operator | Dec 2024 |
| 33255 | Zap Oil Company | Nowata, OK 74048-2640 | Oil & Gas Operator | Nov 2005 |
| 33256 | Zapata-Fender, L. L. C. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2001 |
| 33257 | Zargon Oil (ND) Inc. | | Oil & Gas Operator | Feb 2025 |
| 33258 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 33259 | Zavala Independent Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2007 |
| 33260 | Zavanna Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2025 |
| 33261 | Zavanna, LLC | | Oil & Gas Operator | Feb 2025 |
| 33262 | Zaveri Oil & Gas LTD | Albany, KY 42602 | Oil Operator | Dec 2006 |
| 33263 | Zaza Energy, LLC | Houston, TX 77010 | Oil & Gas Operator | Apr 2025 |
| 33264 | Zca Gas Gathering Co., Inc. | Bartlesville, OK 74003 | Oil & Gas Operator | Apr 2020 |
| 33265 | Zeagler Enterprises, Inc. | | Oil & Gas Operator | Jun 2008 |
| 33266 | Zeal Production Company | Sperry, OK 74073-4714 | Oil & Gas Operator | Feb 2025 |
| 33267 | Zebra Oil And Gas | Lubbock, TX 79423 | Oil & Gas Operator | Aug 2002 |
| 33268 | Zebra Oil Company | El Campo, TX 77437 | Oil & Gas Operator | Apr 2025 |
| 33269 | Zeiders Bros Oil & Gas Co LLC | Edmond, OK 73003 | Oil & Gas Operator | Jan 2025 |
| 33270 | Zeit Exploration Co., Inc. | | Oil & Gas Operator | May 1994 |
| 33271 | Zelaya Oil And Gas, LLC | Premont, TX 78375 | Oil & Gas Operator | Apr 2025 |
| 33272 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2025 |
| 33273 | Zenergy Operating Co. | | Oil & Gas Operator | Sep 2023 |
| 33274 | Zenergy Operating Company, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2016 |
| 33275 | Zenith Drilling | | Oil & Gas Operator | Aug 1995 |
| 33276 | Zenith Drilling Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
| 33277 | Zenith Exploration Co Inc | Washington, PA 15301 | Oil & Gas Operator | Dec 2014 |
| 33278 | Zenith Oil & Gas Inc | MT Gilead, OH 43338 | Oil & Gas Operator | Dec 1999 |
| 33279 | Zenith Oil & Gas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2025 |
| 33280 | Zenithal LLC | Isonville, KY 41149 | Oil & Gas Operator | Dec 2023 |
| 33281 | Zephyr Lone Star Oper Co.,L.L.C. | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2025 |
| 33282 | Zephyr Operating Co LLC | Oklahoma City, OK 73118-6035 | Oil & Gas Operator | Feb 2025 |
| 33283 | Zephyr SWD LLC | Oklahoma City, OK 73118-6035 | Oil Operator | Jan 2025 |
| 33284 | Zerbst James E | | Oil & Gas Operator | Apr 2007 |
| 33285 | Zercon Oil & Gas, Inc. | | Oil Operator | Oct 2003 |
| 33286 | Zero Mass Mining, LLC | | Oil Operator | Jan 2025 |
| 33287 | Zeta Energy LLC | Ashland, OR 97520 | Oil Operator | Dec 2024 |
| 33288 | Zetetic Partners, LTD. | Georgetown, TX 78626 | Oil Operator | Dec 2018 |
| 33289 | Zgen, Inc. | | Oil & Gas Operator | Jul 1990 |
| 33290 | Zia Energy Inc | The Woodlands, TX 77380 | Oil & Gas Operator | May 2005 |
| 33291 | Zia Minerals LTD Co | Andrews, TX 79714 | Oil & Gas Operator | Sep 1996 |
| 33292 | Zickefoose, R. L. And W.F. | Burgettstown, PA 15021 | Oil & Gas Operator | Dec 2021 |
| 33293 | Ziegler-Peru, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2019 |
| 33294 | Zielke Contracting LLC | Balko, OK 73931-1187 | Oil Operator | Jun 2020 |
| 33295 | Zilhaver Brian K | Cambridge Springs, PA 16403-4114 | Gas Operator | Dec 2024 |
| 33296 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |
| 33297 | Zilkha Energy Inc | Houston, TX 77002-5223-5223 | Oil & Gas Operator | Dec 2008 |
| 33298 | Zim Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Jan 1998 |
| 33299 | Zimco (Robt A Zimmerman) | Wolf Point, MT 59201 | Oil Operator | Apr 2009 |
| 33300 | Zimet Brothers Inc | | Oil Operator | Mar 2008 |