| 401 | COONEY | Liberty County, MT | Oil & Gas Property | Jan 2026 |
| 402 | COOPER 1-10H | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 403 | COPLEY | Pondera County, MT | Oil Property | Mar 2026 |
| 404 | COPPER 2959 42-20H | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 405 | COPULOS | Stillwater County, MT | Gas Property | Aug 2008 |
| 406 | CORAL CR | Fallon County, MT | Oil & Gas Property | Feb 2026 |
| 407 | CORAL CREEK | Fallon County, MT | Oil & Gas Property | Feb 2026 |
| 408 | COREY | Toole County, MT | Oil & Gas Property | Jan 2026 |
| 409 | CORRAL CREEK 14-14SH | Fallon County, MT | Oil & Gas Property | Mar 2026 |
| 410 | CORRIGEUX | Glacier County, MT | Oil Property | Aug 2023 |
| 411 | COURCHENE | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 412 | COURTNEY | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 413 | COX 2 | Fallon County, MT | Gas Property | Feb 2026 |
| 414 | COYOTE | Toole County, MT | Oil Property | Sep 2024 |
| 415 | COYOTE FEDERAL 2758 43-8H | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 416 | COYOTE-CUNDIFF 10-14-H | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 417 | COYOTE-DENNY 10-16H | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 418 | CP 33 | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 419 | CRAIG FEDERAL | Toole County, MT | Oil & Gas Property | Sep 1990 |
| 420 | CRAWFORD A | Valley County, MT | Oil & Gas Property | Mar 2026 |
| 421 | CREIGHTON | Yellowstone County, MT | Oil Property | Jul 1993 |
| 422 | CROCKET 2958 42-21 1H | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 423 | CROFT | Carbon County, MT | Oil & Gas Property | Aug 1988 |
| 424 | CROSS | Glacier County, MT | Oil Property | Mar 2026 |
| 425 | CROW TRIB | Big Horn County, MT | Oil Property | Feb 2026 |
| 426 | CROW TRIBAL | Big Horn County, MT | Oil Property | Feb 2026 |
| 427 | CROW TRIBAL | Big Horn County, MT | Oil Property | Oct 1997 |
| 428 | CROWE | Hill County, MT | Gas Property | Mar 2026 |
| 429 | CRUSCH | Roosevelt County, MT | Oil & Gas Property | Nov 2014 |
| 430 | CRUSCH | Roosevelt County, MT | Oil & Gas Property | Nov 2013 |
| 431 | CRUSCH | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 432 | CSTSU | Rosebud County, MT | Oil Property | Jul 2025 |
| 433 | CULVERIN 1-32H | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 434 | CUNDIFF | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 435 | CUNDIFF 8-22 | Richland County, MT | Oil & Gas Property | Dec 2022 |
| 436 | CUNNINGHAM 1 | Hill County, MT | Gas Property | Apr 2016 |
| 437 | CURTIS HUNTER | Richland County, MT | Oil & Gas Property | Sep 2023 |
| 438 | DAD FRYE FEDERAL 2758 24-32B | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 439 | DAFOE | Liberty County, MT | Gas Property | Mar 2026 |
| 440 | DAGNEY 21-28 #1H | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 441 | DAGNEY 33-21 | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 442 | DAHL | Valley County, MT | Oil & Gas Property | Mar 2026 |
| 443 | DAHL | Sheridan County, MT | Oil & Gas Property | Feb 2026 |
| 444 | DAHL | Sheridan County, MT | Oil & Gas Property | Dec 2025 |
| 445 | DAHLIN 2 | Hill County, MT | Gas Property | Mar 2026 |
| 446 | DAHLQUIST | Toole County, MT | Oil Property | Dec 2021 |
| 447 | DAHLQUIST | Glacier County, MT | Oil & Gas Property | Apr 2026 |
| 448 | DAKOTA | Toole County, MT | Oil & Gas Property | Mar 2026 |
| 449 | DAN MCGOW | Toole County, MT | Oil & Gas Property | Sep 2025 |
| 450 | DANIEL | Hill County, MT | Gas Property | Mar 2026 |
| 451 | DANIELS | Richland County, MT | Oil & Gas Property | Jun 2015 |
| 452 | DANIELS 33X-2 | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 453 | DANIELSON | Toole County, MT | Oil Property | Dec 2025 |
| 454 | DANNENBERG | Stillwater County, MT | Gas Property | May 1992 |
| 455 | DANSER 4 | Toole County, MT | Oil & Gas Property | Jan 2026 |
| 456 | DARLENE 41X-20 | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 457 | DART 21-33 | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 458 | DAVE T 2958 13-25H | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 459 | DAVEY | Blaine County, MT | Gas Property | Mar 2026 |
| 460 | DAVEY | Toole County, MT | Oil Property | Apr 2005 |
| 461 | DAVEY | Hill County, MT | Gas Property | Mar 2026 |
| 462 | DAVID | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 463 | DAVID FEDERAL 2658 43-9H | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 464 | DAY GOVERNMENT | Toole County, MT | Oil Property | Jun 2016 |
| 465 | DECKER | Big Horn County, MT | Gas Property | Jun 2013 |
| 466 | DECKER FED | Big Horn County, MT | Gas Property | Jun 2013 |
| 467 | DECKER FEDERAL 2790 11 | Big Horn County, MT | Gas Property | Dec 2012 |
| 468 | DEER CREEK | Dawson County, MT | Oil & Gas Property | Mar 2026 |
| 469 | DEES | Hill County, MT | Gas Property | Mar 2026 |
| 470 | DEHLBOM | Blaine County, MT | Gas Property | Mar 2026 |
| 471 | DEJAEGHER | Musselshell County, MT | Oil Property | Oct 2020 |
| 472 | DEL RE | Toole County, MT | Gas Property | Apr 2026 |
| 473 | DELANEY | Glacier County, MT | Gas Property | Apr 2026 |
| 474 | DELANEY FEDERAL 21-4 4-9H | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 475 | DELORES | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 476 | DEMAREST | Liberty County, MT | Oil & Gas Property | Feb 2026 |
| 477 | DENZER | Pondera County, MT | Oil Property | Nov 2024 |
| 478 | DEPARMENT | Toole County, MT | Oil Property | Mar 2026 |
| 479 | DESCHAMP | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 480 | DETIENNE | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 481 | DEVELIN GOV | Toole County, MT | Oil & Gas Property | Sep 2018 |
| 482 | DEVIN | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 483 | DEWALD | Hill County, MT | Gas Property | Mar 2026 |
| 484 | DEWEY | Sheridan County, WY | Gas Property | Jun 2015 |
| 485 | DEZORT 1 | Glacier County, MT | Gas Property | Apr 2026 |
| 486 | DIAL | Glacier County, MT | Oil & Gas Property | Dec 2022 |
| 487 | DIAL | Toole County, MT | Gas Property | Mar 2026 |
| 488 | DIAMOND | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 489 | DIANNE FEDERAL 2658 42-22H | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 490 | DICKEY (1 | Blaine County, MT | Gas Property | Mar 2026 |
| 491 | DIGE 41X-29DXA | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 492 | DION | Hill County, MT | Gas Property | Mar 2026 |
| 493 | DIPPLE | Toole County, MT | Oil Property | Mar 2026 |
| 494 | DIRK FEDERAL 1-22-21H | Richland County, MT | Oil & Gas Property | Mar 2026 |
| 495 | DISCO 2959 13-30H | Roosevelt County, MT | Oil & Gas Property | Mar 2026 |
| 496 | DIX MONT STATE | Toole County, MT | Oil & Gas Property | Mar 2026 |
| 497 | DK BRUINS | Toole County, MT | Oil Property | Feb 2026 |
| 498 | DONOVAN | Toole County, MT | Oil Property | Nov 1989 |
| 499 | DONOVAN | Toole County, MT | Oil Property | Oct 2024 |
| 500 | DORE | Richland County, MT | Oil & Gas Property | Oct 2024 |