| 401 | ZIRCON 2 | Eddy County, NM | Oil & Gas Property | Mar 2026 |
| 402 | ZIRCON 2 1 B3 | Eddy County, NM | Oil & Gas Property | Mar 2026 |
| 403 | ZIRCON 2 B1 | Eddy County, NM | Oil & Gas Property | Mar 2026 |
| 404 | ZIRCON 2 STATE COM | Eddy County, NM | Oil & Gas Property | Mar 2026 |
| 405 | ZIRCON UNIT 1 | Fayette County, TX | Oil & Gas Property | Mar 2026 |
| 406 | ZIRCONIUM 147-93-05B-08H | Dunn County, ND | Oil & Gas Property | Apr 2026 |
| 407 | ZIRICOTE | Gonzales County, TX | Oil & Gas Property | Mar 2026 |
| 408 | ZIRKLE | Upshur County, WV | Oil & Gas Property | Dec 2021 |
| 409 | ZIRKLE, ESTELLA | Harrison County, WV | Oil & Gas Property | Dec 2021 |
| 410 | ZIRKLE, WILBERT O. P.C. WILLIAMS | Harrison County, WV | Oil & Gas Property | Jul 2012 |
| 411 | ZISCH | Weld County, CO | Oil & Gas Property | Jan 2026 |
| 412 | ZISSOU | Howard County, TX | Oil & Gas Property | Mar 2026 |
| 413 | ZITTLE E | Erie County, NY | Gas Property | Dec 2024 |
| 414 | ZIVLEY | Fort Bend County, TX | Oil Property | Sep 2011 |
| 415 | ZIVLEY TRUSTEE | Fort Bend County, TX | Oil Property | Jan 2026 |
| 416 | ZIZINIA | La Salle County, TX | Oil & Gas Property | Mar 2026 |
| 417 | ZLOMEK | Allegany County, NY | Oil & Gas Property | Dec 2024 |
| 418 | ZM FARMS A | Haskell County, KS | Oil & Gas Property | Feb 2026 |
| 419 | ZMIJEWSKI & ZIETLOW ET AL 1-26 | Jackson County, MI | Oil & Gas Property | Mar 2026 |
| 420 | ZN 27 22 FEDERAL STATE COM | Lea County, NM | Oil & Gas Property | Mar 2026 |
| 421 | ZOCH | Fayette County, TX | Oil & Gas Property | Mar 2026 |
| 422 | ZOCH UNIT | Lee County, TX | Oil & Gas Property | Mar 2026 |
| 423 | ZOE 09 | San Juan County, NM | Gas Property | Mar 2026 |
| 424 | ZOE 37 | Midland County, TX | Oil & Gas Property | Mar 2026 |
| 425 | ZOE DRAW | Campbell County, WY | Oil Property | Dec 2008 |
| 426 | ZOE H IRWIN | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 427 | ZOELLER | Pottawatomie County, OK | Oil Property | Mar 2026 |
| 428 | ZOEY 4-16 | Upton County, TX | Oil & Gas Property | Mar 2026 |
| 429 | ZOEY 9-16 | Midland County, TX | Oil & Gas Property | Mar 2026 |
| 430 | ZOFNESS | Moore County, TX | Gas Property | Mar 2026 |
| 431 | ZOGOL, JOHN A. & REBECCA J. ZOGOL | Marion County, WV | Gas Property | Dec 2021 |
| 432 | ZOKOE | Ottawa County, MI | Oil & Gas Property | Mar 2026 |
| 433 | ZOLA | Erie County, NY | Gas Property | Dec 2024 |
| 434 | ZOLADZ | Genesee County, NY | Gas Property | Dec 2024 |
| 435 | ZOLDOSKE | Harper County, OK | Oil & Gas Property | Feb 2026 |
| 436 | ZOLDOSKE | Ellis County, OK | Oil & Gas Property | Dec 2019 |
| 437 | ZOLLAR | Lincoln County, OK | Oil & Gas Property | Mar 2026 |
| 438 | ZOLLER 34 | Ward County, TX | Oil & Gas Property | Mar 2026 |
| 439 | ZOLLINGER | Harper County, OK | Oil & Gas Property | Mar 2026 |
| 440 | ZONKER | Hood County, TX | Oil & Gas Property | Mar 2026 |
| 441 | ZOOK | Montgomery County, KS | Oil & Gas Property | Feb 2026 |
| 442 | ZOOK | Pawnee County, KS | Oil & Gas Property | Jan 2023 |
| 443 | ZOOK | Kay County, OK | Oil & Gas Property | Dec 2025 |
| 444 | ZOOK 1 | Woods County, OK | Oil & Gas Property | Sep 2015 |
| 445 | ZOOK 1-2 | Woods County, OK | Oil & Gas Property | Feb 2023 |
| 446 | ZOOK 41-25TFH | Mountrail County, ND | Oil & Gas Property | Apr 2026 |
| 447 | ZORA MAE | Johnson County, TX | Oil & Gas Property | Feb 2026 |
| 448 | ZORA UNIT | Cooke County, TX | Oil & Gas Property | Mar 2026 |
| 449 | ZORACKI | Westmoreland County, PA | Gas Property | Dec 2025 |
| 450 | ZORILLA-MALONE | Victoria County, TX | Oil & Gas Property | Mar 2026 |
| 451 | ZORIN | Monroe County, OH | Gas Property | Mar 2026 |
| 452 | ZORN | Richardson County, NE | Oil Property | Dec 2025 |
| 453 | ZORN | Barton County, KS | Oil Property | Feb 2026 |
| 454 | ZORNS T. H | Wise County, TX | Oil & Gas Property | Feb 2026 |
| 455 | ZORO LOT 451 0 | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 456 | ZOROSAK UNIT | Westmoreland County, PA | Gas Property | Mar 2026 |
| 457 | ZORRILLO ANZ FEDERAL | Eddy County, NM | Oil & Gas Property | Apr 2021 |
| 458 | ZORRO | McKenzie County, ND | Oil & Gas Property | Apr 2026 |
| 459 | ZORRO | Washington County, PA | Gas Property | Mar 2026 |
| 460 | ZORRO 16 | Major County, OK | Oil & Gas Property | Apr 2020 |
| 461 | ZOS 1-26-35XH | Custer County, OK | Oil & Gas Property | Feb 2026 |
| 462 | ZPZ 34-196 WRD UNIT | Ward County, TX | Oil & Gas Property | Mar 2026 |
| 463 | ZPZ 34-211 UNIT | Ward County, TX | Oil & Gas Property | Mar 2026 |
| 464 | ZPZ FEE | Upton County, TX | Oil & Gas Property | Mar 2026 |
| 465 | ZPZ FEE 10 | Upton County, TX | Oil & Gas Property | Mar 2026 |
| 466 | ZPZ FEE 5406 | Upton County, TX | Oil & Gas Property | Mar 2026 |
| 467 | ZR UNIT | McMullen County, TX | Oil & Gas Property | Mar 2026 |
| 468 | ZRZAVY UNIT | Frio County, TX | Oil & Gas Property | Mar 2026 |
| 469 | ZSCHECH C UNIT | Burleson County, TX | Oil Property | Feb 2026 |
| 470 | ZSCHECH UNIT | Lee County, TX | Oil & Gas Property | Feb 2026 |
| 471 | ZUBER | Jack County, TX | Oil & Gas Property | Mar 2026 |
| 472 | ZUCINNI CS FED | Campbell County, WY | Gas Property | Feb 2012 |
| 473 | ZUCK 1-1 | McClain County, OK | Oil & Gas Property | Feb 2026 |
| 474 | ZUCK S.V. STATE A2796 | Webb County, TX | Oil & Gas Property | Mar 2026 |
| 475 | ZUCKERMAN | San Joaquin County, CA | Gas Property | Mar 1990 |
| 476 | ZUDELL | Noble County, OH | Oil & Gas Property | Dec 2025 |
| 477 | ZUEB | Gray County, TX | Oil & Gas Property | Feb 2026 |
| 478 | ZUEGE | Yuma County, CO | Gas Property | Feb 2026 |
| 479 | ZUEHLKE UNIT | Fayette County, TX | Oil & Gas Property | Mar 2026 |
| 480 | ZUERCHER | Edwards County, KS | Oil & Gas Property | Feb 2026 |
| 481 | ZUERCHER | Edwards County, KS | Oil & Gas Property | Feb 2026 |
| 482 | ZUGG | Pawnee County, KS | Oil & Gas Property | Jan 2026 |
| 483 | ZUIDERVEEN | Missaukee County, MI | Oil & Gas Property | Jan 2026 |
| 484 | ZULA 1 | Howard County, TX | Oil & Gas Property | Feb 2026 |
| 485 | ZULA 18 | Roger Mills County, OK | Oil & Gas Property | Feb 2026 |
| 486 | ZULCH, SALLY | Madison County, TX | Oil & Gas Property | Feb 2026 |
| 487 | ZULETTE | Reagan County, TX | Oil & Gas Property | Jan 2026 |
| 488 | ZULU | Mountrail County, ND | Oil & Gas Property | Apr 2026 |
| 489 | ZUM 28-13-7 | Canadian County, OK | Oil & Gas Property | Mar 2026 |
| 490 | ZUM MALLEN | Canadian County, OK | Oil & Gas Property | Feb 2021 |
| 491 | ZUM MALLEN 1307 | Canadian County, OK | Oil & Gas Property | Feb 2026 |
| 492 | ZUMA 3 | Loving County, TX | Oil & Gas Property | Mar 2026 |
| 493 | ZUMA 57-T1-3X10 | Loving County, TX | Oil & Gas Property | Mar 2026 |
| 494 | ZUMBACH UNIT | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 495 | ZUMBRO | Franklin County, MS | Oil & Gas Property | Jul 2021 |
| 496 | ZUMMALLEN | Kingfisher County, OK | Oil & Gas Property | Feb 2026 |
| 497 | ZUMPETTA, LAWRENCE ET AL ZMBG | Wetzel County, WV | Oil & Gas Property | Dec 2021 |
| 498 | ZUMWALT | Colusa County, CA | Gas Property | Mar 2026 |
| 499 | ZUMWALT | Stephens County, OK | Oil & Gas Property | Feb 2026 |
| 500 | ZUMWALT | Colusa County, CA | Gas Property | Jul 2005 |