| 401 | COX 2 | Fallon County, MT | Gas Property | Apr 2025 |
| 402 | COYOTE | Toole County, MT | Oil Property | Sep 2024 |
| 403 | COYOTE-CUNDIFF 10-14H | Richland County, MT | Oil & Gas Property | May 2025 |
| 404 | CP 33 | Richland County, MT | Oil & Gas Property | Apr 2025 |
| 405 | CRAIG FEDERAL | Toole County, MT | Oil & Gas Property | Sep 1990 |
| 406 | CRAWFORD A | Valley County, MT | Oil & Gas Property | May 2025 |
| 407 | CREIGHTON | Yellowstone County, MT | Oil Property | Jul 1993 |
| 408 | CROCKET 2958 42-21 1H | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 409 | CROFT | Toole County, MT | Gas Property | Nov 2023 |
| 410 | CROFT | Carbon County, MT | Oil & Gas Property | Aug 1988 |
| 411 | CROSS | Glacier County, MT | Oil Property | May 2025 |
| 412 | CROW TRIB | Big Horn County, MT | Oil Property | May 2025 |
| 413 | CROW TRIBAL | Big Horn County, MT | Oil Property | May 2025 |
| 414 | CROW TRIBAL | Big Horn County, MT | Oil Property | Oct 1997 |
| 415 | CROWE | Hill County, MT | Gas Property | May 2025 |
| 416 | CRUSCH | Roosevelt County, MT | Oil & Gas Property | Nov 2014 |
| 417 | CRUSCH | Roosevelt County, MT | Oil & Gas Property | Nov 2013 |
| 418 | CRUSCH | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 419 | CSTSU | Rosebud County, MT | Oil Property | Feb 2025 |
| 420 | CULVERIN 1-32H | Richland County, MT | Oil & Gas Property | May 2025 |
| 421 | CUNDIFF | Richland County, MT | Oil & Gas Property | May 2025 |
| 422 | CUNDIFF 8-22 | Richland County, MT | Oil & Gas Property | Dec 2022 |
| 423 | CUNNINGHAM 1 | Hill County, MT | Gas Property | Apr 2016 |
| 424 | CURTIS HUNTER | Richland County, MT | Oil & Gas Property | Feb 2024 |
| 425 | DAD FRYE FEDERAL 2758 24-32B | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 426 | DAFOE | Liberty County, MT | Gas Property | May 2025 |
| 427 | DAGNEY 21-28 1H | Richland County, MT | Oil & Gas Property | May 2025 |
| 428 | DAGNEY 33-21 | Richland County, MT | Oil & Gas Property | May 2025 |
| 429 | DAHL | Valley County, MT | Oil & Gas Property | May 2025 |
| 430 | DAHL | Sheridan County, MT | Oil & Gas Property | Apr 2025 |
| 431 | DAHL | Sheridan County, MT | Oil & Gas Property | Jan 2025 |
| 432 | DAHLIN 2 | Hill County, MT | Gas Property | May 2025 |
| 433 | DAHLQUIST | Toole County, MT | Oil Property | Dec 2021 |
| 434 | DAHLQUIST | Glacier County, MT | Oil & Gas Property | May 2025 |
| 435 | DAISY MA | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 436 | DAKOTA | Toole County, MT | Oil & Gas Property | May 2025 |
| 437 | DAN MCGOW | Toole County, MT | Oil & Gas Property | Jan 2024 |
| 438 | DANIEL | Hill County, MT | Gas Property | May 2025 |
| 439 | DANIELLE 4-9 #1H | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 440 | DANIELS | Richland County, MT | Oil & Gas Property | Jun 2015 |
| 441 | DANIELS 33X-2 | Richland County, MT | Oil & Gas Property | May 2025 |
| 442 | DANIELSON | Toole County, MT | Oil Property | Mar 2025 |
| 443 | DANNENBERG | Stillwater County, MT | Gas Property | May 1992 |
| 444 | DANSER 4 | Toole County, MT | Oil & Gas Property | Mar 2025 |
| 445 | DARLENE 41X-20 | Richland County, MT | Oil & Gas Property | May 2025 |
| 446 | DAVEY | Blaine County, MT | Gas Property | May 2025 |
| 447 | DAVEY | Toole County, MT | Oil Property | Apr 2005 |
| 448 | DAVEY | Hill County, MT | Gas Property | May 2025 |
| 449 | DAVID | Richland County, MT | Oil & Gas Property | May 2025 |
| 450 | DAVID FEDERAL 2658 43-9H | Richland County, MT | Oil & Gas Property | May 2025 |
| 451 | DAVIES 1-20H | Richland County, MT | Oil & Gas Property | May 2025 |
| 452 | DAY GOVERNMENT | Toole County, MT | Oil Property | Jun 2016 |
| 453 | DECKER | Big Horn County, MT | Gas Property | Jun 2013 |
| 454 | DECKER FED | Big Horn County, MT | Gas Property | Jun 2013 |
| 455 | DECKER FEDERAL 2790 11 | Big Horn County, MT | Gas Property | Dec 2012 |
| 456 | DEER CREEK | Dawson County, MT | Oil & Gas Property | Apr 2025 |
| 457 | DEES | Hill County, MT | Gas Property | May 2025 |
| 458 | DEHLBOM | Blaine County, MT | Gas Property | May 2025 |
| 459 | DEJAEGHER | Musselshell County, MT | Oil Property | Oct 2020 |
| 460 | DEL RE | Toole County, MT | Gas Property | May 2025 |
| 461 | DELANEY | Glacier County, MT | Gas Property | May 2025 |
| 462 | DELANEY FEDERAL 21-4 4-9H | Richland County, MT | Oil & Gas Property | Apr 2025 |
| 463 | DELLA 14-23 #1H | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 464 | DEMAREST | Liberty County, MT | Oil & Gas Property | Apr 2025 |
| 465 | DENZER | Pondera County, MT | Oil Property | Oct 2023 |
| 466 | DEPARMENT | Toole County, MT | Oil Property | May 2025 |
| 467 | DESCHAMP | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 468 | DETHMAN | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 469 | DETIENNE | Roosevelt County, MT | Oil & Gas Property | Apr 2025 |
| 470 | DEVELIN GOV | Toole County, MT | Oil & Gas Property | Sep 2018 |
| 471 | DEVIN | Richland County, MT | Oil & Gas Property | May 2025 |
| 472 | DEWALD | Hill County, MT | Gas Property | Apr 2025 |
| 473 | DEWEY | Sheridan County, WY | Gas Property | Jun 2015 |
| 474 | DEZORT 1 | Glacier County, MT | Gas Property | May 2025 |
| 475 | DIAL | Glacier County, MT | Oil & Gas Property | Dec 2022 |
| 476 | DIAL | Toole County, MT | Gas Property | May 2025 |
| 477 | DIANNE FEDERAL 2658 42-22H | Richland County, MT | Oil & Gas Property | May 2025 |
| 478 | DICKEY (1 | Blaine County, MT | Gas Property | May 2025 |
| 479 | DIGE 41X-29DXA | Richland County, MT | Oil & Gas Property | May 2025 |
| 480 | DION | Hill County, MT | Gas Property | May 2025 |
| 481 | DIPPLE | Toole County, MT | Oil Property | May 2025 |
| 482 | DIRK FEDERAL 1-22-21H | Richland County, MT | Oil & Gas Property | May 2025 |
| 483 | DIX MONT STATE | Toole County, MT | Oil & Gas Property | May 2025 |
| 484 | DIXIE FEDERAL 2758 14-6H | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 485 | DK BRUINS | Toole County, MT | Oil Property | May 2025 |
| 486 | DONNA 31X-15BXC | Richland County, MT | Oil & Gas Property | May 2025 |
| 487 | DONOVAN | Toole County, MT | Oil Property | Nov 1989 |
| 488 | DONOVAN | Toole County, MT | Oil Property | Oct 2024 |
| 489 | DORE | Richland County, MT | Oil & Gas Property | Oct 2024 |
| 490 | DORIGHT | Richland County, MT | Oil & Gas Property | May 2025 |
| 491 | DORIS 10-3 #1H | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 492 | DOROTHY | Richland County, MT | Oil & Gas Property | May 2025 |
| 493 | DOROTHY MELVIN 4 HSU | Richland County, MT | Oil & Gas Property | May 2025 |
| 494 | DOUBLE "V" 1-21 H | Richland County, MT | Oil & Gas Property | May 2025 |
| 495 | DOUBLE BAR M 24-32H | Richland County, MT | Oil & Gas Property | May 2025 |
| 496 | DOUG | Slope County, ND | Oil & Gas Property | May 2025 |
| 497 | DOYLE (1-9 | Richland County, MT | Oil & Gas Property | Apr 2025 |
| 498 | DRAKE | Toole County, MT | Gas Property | Mar 2025 |
| 499 | DREES | Musselshell County, MT | Oil & Gas Property | Jun 1992 |
| 500 | DRINGMAN | Big Horn County, MT | Gas Property | Nov 2020 |