| 301 | C PETERS | Sheridan County, MT | Oil & Gas Property | May 2025 |
| 302 | C R HORTON | Yellowstone County, MT | Oil & Gas Property | Jul 2007 |
| 303 | C. REDDIG | Valley County, MT | Oil & Gas Property | Aug 2013 |
| 304 | C. SOLBERG | Sheridan County, MT | Oil & Gas Property | May 2025 |
| 305 | C.J. IVERSON | Liberty County, MT | Oil & Gas Property | Apr 2025 |
| 306 | CABIN CR | Fallon County, MT | Oil & Gas Property | May 2025 |
| 307 | CABLE MARIE 29-15-HLID3 | Richland County, MT | Oil & Gas Property | May 2025 |
| 308 | CABLE-LEONARD 29-14H | Richland County, MT | Oil & Gas Property | May 2025 |
| 309 | CABLE-S | Richland County, MT | Oil & Gas Property | May 2025 |
| 310 | CABLE-STEPPLER 20-2H | Richland County, MT | Oil & Gas Property | May 2025 |
| 311 | CAINE | Toole County, MT | Oil Property | May 2025 |
| 312 | CALLISON | Glacier County, MT | Gas Property | May 2025 |
| 313 | CALVIN | Richland County, MT | Oil & Gas Property | May 2025 |
| 314 | CAMPBELL | Blaine County, MT | Gas Property | May 2025 |
| 315 | CAMPBELL | Pondera County, MT | Oil Property | Apr 2013 |
| 316 | CAMPBELL | Teton County, MT | Oil Property | Jan 2025 |
| 317 | CANAL 6-4 | Richland County, MT | Oil & Gas Property | May 2025 |
| 318 | CANDEE | Richland County, MT | Oil & Gas Property | Jan 2016 |
| 319 | CANDEE | Richland County, MT | Oil & Gas Property | May 2025 |
| 320 | CANDEE | Richland County, MT | Oil & Gas Property | Apr 2019 |
| 321 | CANDEE | Richland County, MT | Oil & Gas Property | May 2025 |
| 322 | CANDEE 41X-6 | Richland County, MT | Oil & Gas Property | May 2025 |
| 323 | CANUCKS | Richland County, MT | Oil & Gas Property | Aug 2017 |
| 324 | CARDA | Richland County, MT | Oil & Gas Property | May 2025 |
| 325 | CARL FEDERAL 2658 43-23H | Richland County, MT | Oil & Gas Property | May 2025 |
| 326 | CARLTON DEWEY 3290 | Big Horn County, MT | Gas Property | Feb 2012 |
| 327 | CAROLINE 1-32H | Richland County, MT | Oil & Gas Property | May 2025 |
| 328 | CARSON FEDERAL 2658 13-17H | Richland County, MT | Oil & Gas Property | May 2025 |
| 329 | CASE | Blaine County, MT | Gas Property | May 2025 |
| 330 | CASKEY | Teton County, MT | Oil Property | Dec 2020 |
| 331 | CAT CREEK UNIT | Petroleum County, MT | Oil Property | May 2025 |
| 332 | CAYKO | Richland County, MT | Oil & Gas Property | May 2025 |
| 333 | CAYKO FEDERAL 34-41 | Richland County, MT | Oil & Gas Property | May 2025 |
| 334 | CBSU | Glacier County, MT | Oil & Gas Property | Jan 2014 |
| 335 | CEDAR CREEK | Bowman County, ND | Oil & Gas Property | May 2025 |
| 336 | CELSIUS | Toole County, MT | Oil Property | May 2025 |
| 337 | CHAINSAW | Richland County, MT | Oil & Gas Property | May 2025 |
| 338 | CHAINSAW-MAGRUDER 11 | Richland County, MT | Oil & Gas Property | May 2025 |
| 339 | CHAPMAN | Carbon County, MT | Oil & Gas Property | May 2024 |
| 340 | CHARLES NEVINS | Richland County, MT | Oil & Gas Property | May 2025 |
| 341 | CHARLES SENNER 20D-2-1 | Dawson County, MT | Oil & Gas Property | Apr 2025 |
| 342 | CHARLIE | Richland County, MT | Oil & Gas Property | May 2025 |
| 343 | CHARLIE CREEK | Richland County, MT | Oil & Gas Property | May 2025 |
| 344 | CHARLOTTE | Richland County, MT | Oil & Gas Property | May 2025 |
| 345 | CHERRY | Richland County, MT | Oil & Gas Property | May 2025 |
| 346 | CHERRY PATCH | Blaine County, MT | Gas Property | Jan 2020 |
| 347 | CHERRY PATCH | Blaine County, MT | Gas Property | Apr 2025 |
| 348 | CHERRY PATCH 1 | Blaine County, MT | Gas Property | Aug 2011 |
| 349 | CHERYL PEDERSON 14 | Richland County, MT | Oil & Gas Property | May 2025 |
| 350 | CHEVRON | Sheridan County, WY | Gas Property | Mar 2012 |
| 351 | CHEVRON | Toole County, MT | Gas Property | May 2025 |
| 352 | CHILDERS | Richland County, MT | Oil & Gas Property | May 2025 |
| 353 | CHILDERS | Toole County, MT | Gas Property | Mar 2025 |
| 354 | CHIPPEWA | Hill County, MT | Gas Property | May 2025 |
| 355 | CHOUTEAU | Blaine County, MT | Gas Property | May 2025 |
| 356 | CHOUTEAU | Blaine County, MT | Gas Property | Apr 2025 |
| 357 | CHRISTENSEN | Teton County, MT | Oil Property | Mar 2025 |
| 358 | CHRISTENSEN | Sheridan County, MT | Oil & Gas Property | May 2025 |
| 359 | CHRISTENSEN 1 | Sheridan County, MT | Oil & Gas Property | May 2025 |
| 360 | CHRISTENSON | Teton County, MT | Oil Property | Apr 2025 |
| 361 | CHRISTIAN | Toole County, MT | Gas Property | May 2025 |
| 362 | CHRISTIANSEN | Richland County, MT | Oil & Gas Property | May 2025 |
| 363 | CITADEL 2-11-2H | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 364 | CLAPPER | Glacier County, MT | Gas Property | May 2025 |
| 365 | CLAYBORN | Hill County, MT | Gas Property | May 2025 |
| 366 | CLAYTON | Richland County, MT | Oil & Gas Property | May 2025 |
| 367 | CLAYTON-ALICE HSU | Richland County, MT | Oil & Gas Property | May 2025 |
| 368 | CLEAVER 1-30H | Richland County, MT | Oil & Gas Property | May 2025 |
| 369 | CLIFFORD-PARKER | Toole County, MT | Oil Property | Jun 1989 |
| 370 | COBB | Toole County, MT | Oil Property | Mar 2025 |
| 371 | COBURN | Glacier County, MT | Gas Property | May 2025 |
| 372 | COFFEE | Rosebud County, MT | Oil Property | May 2020 |
| 373 | COLBRY | Liberty County, MT | Gas Property | May 2025 |
| 374 | COLLEEN | Richland County, MT | Oil & Gas Property | May 2025 |
| 375 | COLLIER | Toole County, MT | Gas Property | May 2025 |
| 376 | COLUMBIAN 1 | Blaine County, MT | Gas Property | May 2025 |
| 377 | CONAWAY 1-19H | Richland County, MT | Oil & Gas Property | May 2025 |
| 378 | CONNER | Big Horn County, MT | Gas Property | Mar 2012 |
| 379 | CONNOLE | Teton County, MT | Oil Property | Apr 2025 |
| 380 | CONNOLLY | Glacier County, MT | Oil Property | Aug 1996 |
| 381 | CONSOL | Big Horn County, MT | Gas Property | Apr 2012 |
| 382 | CONSOL FEDERAL | Big Horn County, MT | Gas Property | Apr 2012 |
| 383 | CONSOL FEDERAL 2 | Big Horn County, MT | Gas Property | Jun 2013 |
| 384 | CONSTANCE | Richland County, MT | Oil & Gas Property | May 2025 |
| 385 | CONSTANCE-STONEY BUTTE HSU | Richland County, MT | Oil & Gas Property | May 2025 |
| 386 | CONT | Toole County, MT | Gas Property | Apr 2025 |
| 387 | CONTINENTAL | Toole County, MT | Gas Property | Apr 2025 |
| 388 | CONTINENTAL | Toole County, MT | Oil & Gas Property | Apr 2025 |
| 389 | COON | Richland County, MT | Oil & Gas Property | May 2025 |
| 390 | COONEY | Liberty County, MT | Oil & Gas Property | Dec 2024 |
| 391 | COOPER 1-10H | Richland County, MT | Oil & Gas Property | May 2025 |
| 392 | COPLEY | Pondera County, MT | Oil Property | Apr 2025 |
| 393 | COPPER 2959 42-20H | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 394 | COPULOS | Stillwater County, MT | Gas Property | Aug 2008 |
| 395 | CORAL CR | Fallon County, MT | Oil & Gas Property | May 2025 |
| 396 | CORAL CREEK | Fallon County, MT | Oil & Gas Property | May 2025 |
| 397 | COREY | Toole County, MT | Oil & Gas Property | Apr 2025 |
| 398 | CORRAL CREEK 14-14SH | Fallon County, MT | Oil & Gas Property | May 2025 |
| 399 | CORRIGEUX | Glacier County, MT | Oil Property | Aug 2023 |
| 400 | COURCHENE | Roosevelt County, MT | Oil & Gas Property | May 2025 |