| 401 | ZIONS FED | Emery County, UT | Gas Property | Jun 2026 |
| 402 | ZIPP RANCH 34 | Crockett County, TX | Oil & Gas Property | Jun 2026 |
| 403 | ZIPSIE | Cotton County, OK | Oil Property | May 2026 |
| 404 | ZIRCON | Eddy County, NM | Oil & Gas Property | Jun 2026 |
| 405 | ZIRCON | Lavaca County, TX | Oil & Gas Property | Jun 2026 |
| 406 | ZIRCON 1 B1 | Eddy County, NM | Oil & Gas Property | Jun 2026 |
| 407 | ZIRCON 100 | Upton County, TX | Oil & Gas Property | Jun 2026 |
| 408 | ZIRCON 12 7 B | Eddy County, NM | Oil & Gas Property | Jun 2026 |
| 409 | ZIRCON 12 7 GF FEDERAL COM | Eddy County, NM | Oil & Gas Property | Jun 2026 |
| 410 | ZIRCON 2 | Eddy County, NM | Oil & Gas Property | Jun 2026 |
| 411 | ZIRCON 2 1 B3 | Eddy County, NM | Oil & Gas Property | Jun 2026 |
| 412 | ZIRCON 2 B1 | Eddy County, NM | Oil & Gas Property | Jun 2026 |
| 413 | ZIRCON 2 STATE COM | Eddy County, NM | Oil & Gas Property | Jun 2026 |
| 414 | ZIRCON UNIT 1 | Fayette County, TX | Oil & Gas Property | Jun 2026 |
| 415 | ZIRCONIUM 147-93-05B-08H | Dunn County, ND | Oil & Gas Property | Jun 2026 |
| 416 | ZIRICOTE | Gonzales County, TX | Oil & Gas Property | Jun 2026 |
| 417 | ZIRKLE | Upshur County, WV | Oil & Gas Property | Dec 2021 |
| 418 | ZIRKLE, ESTELLA | Harrison County, WV | Oil & Gas Property | Dec 2021 |
| 419 | ZIRKLE, WILBERT O. P.C. WILLIAMS | Harrison County, WV | Oil & Gas Property | Jul 2012 |
| 420 | ZISCH | Weld County, CO | Oil & Gas Property | May 2026 |
| 421 | ZISSOU | Howard County, TX | Oil & Gas Property | May 2026 |
| 422 | ZITTLE E | Erie County, NY | Gas Property | Dec 2025 |
| 423 | ZIVLEY | Fort Bend County, TX | Oil Property | Sep 2011 |
| 424 | ZIVLEY TRUSTEE | Fort Bend County, TX | Oil Property | Jun 2026 |
| 425 | ZIZINIA | La Salle County, TX | Oil & Gas Property | Jun 2026 |
| 426 | ZLOMEK | Allegany County, NY | Oil & Gas Property | Dec 2025 |
| 427 | ZM FARMS A | Haskell County, KS | Oil & Gas Property | Apr 2026 |
| 428 | ZMIJEWSKI & ZIETLOW ET AL 1-26 | Jackson County, MI | Oil & Gas Property | Jun 2026 |
| 429 | ZN 27 22 FEDERAL STATE COM | Lea County, NM | Oil & Gas Property | Jun 2026 |
| 430 | ZOCH | Fayette County, TX | Oil & Gas Property | Jun 2026 |
| 431 | ZOCH UNIT | Lee County, TX | Oil & Gas Property | Jun 2026 |
| 432 | ZOE 09 | San Juan County, NM | Gas Property | Jul 2026 |
| 433 | ZOE 37 | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 434 | ZOE DRAW | Campbell County, WY | Oil Property | Dec 2008 |
| 435 | ZOE H IRWIN | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 436 | ZOELLER | Pottawatomie County, OK | Oil Property | May 2026 |
| 437 | ZOEY 4-16 | Upton County, TX | Oil & Gas Property | Jun 2026 |
| 438 | ZOEY 9-16 | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 439 | ZOFNESS | Moore County, TX | Gas Property | May 2026 |
| 440 | ZOGOL, JOHN A. & REBECCA J. ZOGOL | Marion County, WV | Gas Property | Dec 2021 |
| 441 | ZOKOE | Ottawa County, MI | Oil & Gas Property | Jun 2026 |
| 442 | ZOLA | Erie County, NY | Gas Property | Dec 2025 |
| 443 | ZOLADZ | Genesee County, NY | Gas Property | Dec 2025 |
| 444 | ZOLDOSKE | Harper County, OK | Oil & Gas Property | May 2026 |
| 445 | ZOLDOSKE | Ellis County, OK | Oil & Gas Property | Dec 2019 |
| 446 | ZOLLAR | Lincoln County, OK | Oil & Gas Property | Jun 2026 |
| 447 | ZOLLER 34 | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 448 | ZOLLINGER | Harper County, OK | Oil & Gas Property | May 2026 |
| 449 | ZONKER | Hood County, TX | Oil & Gas Property | Jun 2026 |
| 450 | ZOOK | Montgomery County, KS | Oil & Gas Property | Apr 2026 |
| 451 | ZOOK | Pawnee County, KS | Oil & Gas Property | Jan 2023 |
| 452 | ZOOK | Kay County, OK | Oil & Gas Property | May 2026 |
| 453 | ZOOK 1 | Woods County, OK | Oil & Gas Property | Sep 2015 |
| 454 | ZOOK 1-2 | Woods County, OK | Oil & Gas Property | Feb 2023 |
| 455 | ZOOK 41-25TFH | Mountrail County, ND | Oil & Gas Property | Jun 2026 |
| 456 | ZORA MAE | Johnson County, TX | Oil & Gas Property | May 2026 |
| 457 | ZORA UNIT | Cooke County, TX | Oil & Gas Property | Jun 2026 |
| 458 | ZORACKI | Westmoreland County, PA | Gas Property | Dec 2025 |
| 459 | ZORILLA-MALONE | Victoria County, TX | Oil & Gas Property | Jun 2026 |
| 460 | ZORIN | Monroe County, OH | Gas Property | Jun 2026 |
| 461 | ZORN | Richardson County, NE | Oil Property | Dec 2025 |
| 462 | ZORN | Barton County, KS | Oil Property | Apr 2026 |
| 463 | ZORNS T. H | Wise County, TX | Oil & Gas Property | Jun 2026 |
| 464 | ZORO LOT 451 0 | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 465 | ZOROSAK UNIT | Westmoreland County, PA | Gas Property | Jun 2026 |
| 466 | ZORRILLO ANZ FEDERAL | Eddy County, NM | Oil & Gas Property | Oct 2021 |
| 467 | ZORRO | McKenzie County, ND | Oil & Gas Property | Jun 2026 |
| 468 | ZORRO | Washington County, PA | Gas Property | Jun 2026 |
| 469 | ZORRO 16 | Major County, OK | Oil & Gas Property | Apr 2020 |
| 470 | ZOS 1-26-35XH | Custer County, OK | Oil & Gas Property | May 2026 |
| 471 | ZPZ 34-196 WRD UNIT | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 472 | ZPZ 34-211 UNIT | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 473 | ZPZ FEE | Upton County, TX | Oil & Gas Property | Jun 2026 |
| 474 | ZPZ FEE 10 | Upton County, TX | Oil & Gas Property | Jun 2026 |
| 475 | ZPZ FEE 5406 | Upton County, TX | Oil & Gas Property | Jun 2026 |
| 476 | ZR A 1 | McMullen County, TX | Oil & Gas Property | Apr 2026 |
| 477 | ZR UNIT | McMullen County, TX | Oil & Gas Property | Jun 2026 |
| 478 | ZRZAVY UNIT | Frio County, TX | Oil & Gas Property | Jun 2026 |
| 479 | ZSCHECH C UNIT | Burleson County, TX | Oil Property | Jun 2026 |
| 480 | ZSCHECH UNIT | Lee County, TX | Oil & Gas Property | May 2026 |
| 481 | ZUBER | Jack County, TX | Oil & Gas Property | Jun 2026 |
| 482 | ZUCINNI CS FED | Campbell County, WY | Gas Property | Feb 2012 |
| 483 | ZUCK S.V. STATE A2796 | Webb County, TX | Oil & Gas Property | Jun 2026 |
| 484 | ZUCKERMAN | San Joaquin County, CA | Gas Property | Mar 1990 |
| 485 | ZUDELL | Noble County, OH | Oil & Gas Property | Dec 2025 |
| 486 | ZUEB | Gray County, TX | Oil & Gas Property | Jun 2026 |
| 487 | ZUEGE | Yuma County, CO | Gas Property | May 2026 |
| 488 | ZUEHLKE UNIT | Fayette County, TX | Oil & Gas Property | Jun 2026 |
| 489 | ZUERCHER | Edwards County, KS | Oil & Gas Property | Apr 2026 |
| 490 | ZUERCHER | Edwards County, KS | Oil & Gas Property | Apr 2026 |
| 491 | ZUGG | Pawnee County, KS | Oil & Gas Property | Mar 2026 |
| 492 | ZUIDERVEEN | Missaukee County, MI | Oil & Gas Property | May 2026 |
| 493 | ZULA 1 | Howard County, TX | Oil & Gas Property | Apr 2026 |
| 494 | ZULA 18 | Roger Mills County, OK | Oil & Gas Property | May 2026 |
| 495 | ZULCH, SALLY | Madison County, TX | Oil & Gas Property | May 2026 |
| 496 | ZULETTE | Reagan County, TX | Oil & Gas Property | Jan 2026 |
| 497 | ZULU | Mountrail County, ND | Oil & Gas Property | Jun 2026 |
| 498 | ZUM 28-13-7 | Canadian County, OK | Oil & Gas Property | May 2026 |
| 499 | ZUM MALLEN | Canadian County, OK | Oil & Gas Property | Feb 2021 |
| 500 | ZUM MALLEN 1307 | Canadian County, OK | Oil & Gas Property | May 2026 |