| 201 | ZENITH-NEWTON | Stark County, ND | Oil & Gas Property | Dec 2014 |
| 202 | ZENO KING GAS UNIT | Freestone County, TX | Oil & Gas Property | Mar 2026 |
| 203 | ZENT 14-11SH | Fallon County, MT | Oil & Gas Property | Mar 2026 |
| 204 | ZENTNER | Richardson County, NE | Oil Property | Dec 2025 |
| 205 | ZENYATTA 2 | Stephens County, OK | Oil & Gas Property | Feb 2026 |
| 206 | ZEOLITE FED | Sweetwater County, WY | Oil & Gas Property | Oct 2024 |
| 207 | ZEON 1807 | Kingfisher County, OK | Oil & Gas Property | Feb 2026 |
| 208 | ZEPEDA | Caldwell County, TX | Oil & Gas Property | Feb 2026 |
| 209 | ZEPHYR 1-36H | Mountrail County, ND | Oil & Gas Property | Apr 2026 |
| 210 | ZEPHYR FEDERAL | Mountrail County, ND | Oil & Gas Property | Apr 2026 |
| 211 | ZEPPELIN 1606 | Kingfisher County, OK | Oil & Gas Property | Feb 2026 |
| 212 | ZEPPELIN 32 W | Eddy County, NM | Oil & Gas Property | Mar 2026 |
| 213 | ZEPPO | Lipscomb County, TX | Oil & Gas Property | Mar 2026 |
| 214 | ZEPPO 5 FEDERAL COM 0 | Lea County, NM | Oil & Gas Property | Mar 2026 |
| 215 | ZERBST | Niobrara County, WY | Oil & Gas Property | Mar 2026 |
| 216 | ZERBST | Niobrara County, WY | Oil & Gas Property | Mar 2026 |
| 217 | ZERBST | Niobrara County, WY | Oil & Gas Property | Sep 2018 |
| 218 | ZERBST FE | Niobrara County, WY | Oil & Gas Property | Mar 2026 |
| 219 | ZERENER | Sumner County, KS | Oil Property | Apr 2019 |
| 220 | ZERFAS | Ellis County, KS | Oil Property | Feb 2026 |
| 221 | ZERGER | Rooks County, KS | Oil Property | Jan 2026 |
| 222 | ZERGER | Kingman County, KS | Oil & Gas Property | Feb 2026 |
| 223 | ZERGER | Kingman County, KS | Oil & Gas Property | Feb 2026 |
| 224 | ZERR | Logan County, KS | Oil Property | Dec 2025 |
| 225 | ZERR TRUST | Gove County, KS | Oil Property | Feb 2026 |
| 226 | ZERTUCHE | Starr County, TX | Oil & Gas Property | Mar 2026 |
| 227 | ZERVOS | Greene County, PA | Oil & Gas Property | Dec 2025 |
| 228 | ZERWER UNIT | Denton County, TX | Oil & Gas Property | Mar 2026 |
| 229 | ZETA 20 | Kingfisher County, OK | Oil & Gas Property | May 2016 |
| 230 | ZETA REED | Big Horn County, MT | Oil Property | Dec 2024 |
| 231 | ZETAS | Andrews County, TX | Oil & Gas Property | Mar 2026 |
| 232 | ZETTA | Ector County, TX | Oil & Gas Property | Jun 2016 |
| 233 | ZETTIE 1-23-26XHM | Custer County, OK | Oil & Gas Property | Feb 2026 |
| 234 | ZEUS | Madison County, TX | Oil & Gas Property | Feb 2026 |
| 235 | ZEUS | Seminole County, OK | Oil Property | Feb 2026 |
| 236 | ZEUS | Westmoreland County, PA | Gas Property | Mar 2026 |
| 237 | ZEUS 149-93-33D-28H | Dunn County, ND | Oil & Gas Property | Apr 2026 |
| 238 | ZEUS 2 11 2BS FEDERAL COM | Lea County, NM | Oil & Gas Property | Mar 2026 |
| 239 | ZEUS 24 | Lea County, NM | Oil & Gas Property | Apr 2026 |
| 240 | ZEUS 7-6 UNIT | Martin County, TX | Oil & Gas Property | Mar 2026 |
| 241 | ZEUS FE | Campbell County, WY | Oil & Gas Property | Mar 2026 |
| 242 | ZEUS STATE | Lea County, NM | Oil & Gas Property | Apr 2026 |
| 243 | ZEV 22 UNIT 1H | Culberson County, TX | Oil & Gas Property | Mar 2026 |
| 244 | ZGABAY | Lee County, TX | Oil & Gas Property | Mar 2026 |
| 245 | ZGABAY A | Dewitt County, TX | Oil & Gas Property | Mar 2026 |
| 246 | ZGABAY B UNIT | Lee County, TX | Oil Property | Feb 2026 |
| 247 | ZGABAY EF UNIT | Burleson County, TX | Oil & Gas Property | Feb 2026 |
| 248 | ZGABAY RAYMOND | Burleson County, TX | Oil & Gas Property | Apr 2020 |
| 249 | ZGRABIK | Ashtabula County, OH | Oil & Gas Property | Dec 2016 |
| 250 | ZIA AHZ FEDERAL COM | Eddy County, NM | Oil & Gas Property | Mar 2026 |
| 251 | ZIA FEDERAL COM | Lea County, NM | Oil & Gas Property | Mar 2026 |
| 252 | ZIA HILLS UNIT | Eddy County, NM | Oil & Gas Property | Apr 2026 |
| 253 | ZIA HILLS UNIT 2532 BS | Lea County, NM | Oil & Gas Property | Apr 2026 |
| 254 | ZICKAFOOSE | Upshur County, WV | Gas Property | Dec 2021 |
| 255 | ZICKAFOOSE, S. H | Ritchie County, WV | Oil & Gas Property | Dec 2021 |
| 256 | ZICKEFOOSE | Upshur County, WV | Oil & Gas Property | Dec 2021 |
| 257 | ZICKEFOOSE, CHARLES, ET AL | Upshur County, WV | Gas Property | Dec 2021 |
| 258 | ZIEBELL | Logan County, OK | Oil & Gas Property | Nov 2014 |
| 259 | ZIEBOLD, JOHN ET AL | Perry County, KY | Gas Property | Dec 2024 |
| 260 | ZIEBOLD, W | Knott County, KY | Oil & Gas Property | Dec 2024 |
| 261 | ZIEGELGRUBER | Oklahoma County, OK | Oil & Gas Property | Feb 2026 |
| 262 | ZIEGENBALG | Gove County, KS | Oil Property | Dec 2025 |
| 263 | ZIEGLER | Tarrant County, TX | Gas Property | Mar 2026 |
| 264 | ZIEGLER | Trego County, KS | Oil Property | Nov 1993 |
| 265 | ZIEGLER | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 266 | ZIEGLER | Venango County, PA | Oil Property | Dec 2025 |
| 267 | ZIEGLER | Sheridan County, KS | Oil Property | Apr 2025 |
| 268 | ZIEGLER | Toole County, MT | Gas Property | Mar 2026 |
| 269 | ZIEGLER | Sheridan County, KS | Oil Property | Aug 2023 |
| 270 | ZIEGLER | Sheridan County, KS | Oil Property | Feb 2026 |
| 271 | ZIEGLER | Gregg County, TX | Oil & Gas Property | Mar 2026 |
| 272 | ZIEGLER | Lavaca County, TX | Oil & Gas Property | Aug 2023 |
| 273 | ZIEGLER | Logan County, CO | Oil & Gas Property | Feb 2026 |
| 274 | ZIEGLER 03 001 0 | Bradford County, PA | Gas Property | Mar 2026 |
| 275 | ZIEGLER TRUST | Gove County, KS | Oil Property | Feb 2026 |
| 276 | ZIEGLERS WASH | Lincoln County, WY | Oil & Gas Property | Apr 2026 |
| 277 | ZIEGLSCHMID | Robertson County, TX | Oil & Gas Property | Mar 2026 |
| 278 | ZIEHM | Manistee County, MI | Oil & Gas Property | May 1985 |
| 279 | ZIELINSKI | Manistee County, MI | Oil & Gas Property | Jun 2023 |
| 280 | ZIEMER | Weld County, CO | Oil & Gas Property | Feb 2026 |
| 281 | ZIENTEK UNIT | Dimmit County, TX | Oil & Gas Property | Mar 2026 |
| 282 | ZIESKE | Coleman County, TX | Oil & Gas Property | Mar 2026 |
| 283 | ZIFF | Centre County, PA | Gas Property | Dec 2025 |
| 284 | ZIFFEL BEY STATE COM | Eddy County, NM | Oil & Gas Property | Dec 2021 |
| 285 | ZIFFLE | Howard County, TX | Oil & Gas Property | Jan 2026 |
| 286 | ZIGLER | Stephens County, OK | Oil Property | Jul 2022 |
| 287 | ZILANT UNIT | Borden County, TX | Oil & Gas Property | Mar 2026 |
| 288 | ZILLINGER | Phillips County, KS | Oil Property | Jan 2026 |
| 289 | ZIMA | McClain County, OK | Oil & Gas Property | Mar 2026 |
| 290 | ZIMBELMAN | Cheyenne County, KS | Gas Property | Feb 2026 |
| 291 | ZIMBELMAN | Cheyenne County, KS | Gas Property | Feb 2026 |
| 292 | ZIMBELMAN | Cheyenne County, KS | Gas Property | Feb 2026 |
| 293 | ZIMBELMAN 1-28 | Cheyenne County, KS | Oil Property | Feb 2026 |
| 294 | ZIMMER | Ellis County, KS | Oil & Gas Property | Feb 2026 |
| 295 | ZIMMER | Grant County, KS | Oil & Gas Property | Jan 2002 |
| 296 | ZIMMER | Barton County, KS | Oil Property | Feb 2026 |
| 297 | ZIMMER | Washington County, OH | Oil & Gas Property | Dec 2025 |
| 298 | ZIMMER | Victoria County, TX | Oil & Gas Property | Mar 2026 |
| 299 | ZIMMER RONALD 10007 | Washington County, PA | Gas Property | Mar 2026 |
| 300 | ZIMMER-MCGREGOR FEE | Kern County, CA | Oil Property | Feb 1991 |