| 1301 | MCHALE-SCHILTZ | Toole County, MT | Oil & Gas Property | Oct 2024 |
| 1302 | MCHENRY | Richland County, MT | Oil & Gas Property | Jan 2025 |
| 1303 | MCINTOSH | Hill County, MT | Gas Property | May 2007 |
| 1304 | MCKECHNIE | Toole County, MT | Gas Property | Apr 2024 |
| 1305 | MCKEE | Toole County, MT | Oil Property | Feb 2025 |
| 1306 | MCKEE | Toole County, MT | Oil Property | Jul 2019 |
| 1307 | MCKEE | Toole County, MT | Oil & Gas Property | Dec 2002 |
| 1308 | MCKINNON | Sheridan County, MT | Oil & Gas Property | May 2022 |
| 1309 | MCLEISH 1 | Blaine County, MT | Gas Property | Feb 2025 |
| 1310 | MCMANUS | Toole County, MT | Oil & Gas Property | Feb 2025 |
| 1311 | MCNAMER | Toole County, MT | Gas Property | Oct 2024 |
| 1312 | MCNAMER | Toole County, MT | Oil Property | Oct 1995 |
| 1313 | MCNAMER | Glacier County, MT | Gas Property | Jul 2014 |
| 1314 | MCQUIGG | Liberty County, MT | Gas Property | Jan 2025 |
| 1315 | MCSLOY | Hill County, MT | Gas Property | Feb 2025 |
| 1316 | MCVAY | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1317 | MEINS | Stillwater County, MT | Gas Property | Apr 2024 |
| 1318 | MEISSNER | Liberty County, MT | Gas Property | Jan 2025 |
| 1319 | MEISSNER | Liberty County, MT | Oil & Gas Property | Feb 2025 |
| 1320 | MELBY | Sheridan County, MT | Oil & Gas Property | Feb 2025 |
| 1321 | MELBY | Sheridan County, MT | Oil & Gas Property | Feb 2025 |
| 1322 | MELDAHL | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1323 | MELVIN | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1324 | MERCER | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1325 | MERCY FEDERAL 2759 44-11B | Roosevelt County, MT | Oil & Gas Property | Feb 2025 |
| 1326 | MERRILL | Richland County, MT | Oil & Gas Property | Jan 2025 |
| 1327 | MERRITT | Fallon County, MT | Oil & Gas Property | Feb 2025 |
| 1328 | MESA-FE | Rosebud County, MT | Oil & Gas Property | Dec 2024 |
| 1329 | METZGER | Hill County, MT | Gas Property | Feb 2025 |
| 1330 | MEULI | Pondera County, MT | Gas Property | Oct 2024 |
| 1331 | MICHAEL 1-27H | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1332 | MICHAELS | Glacier County, MT | Gas Property | Feb 2025 |
| 1333 | MICHELS | Wibaux County, MT | Oil & Gas Property | Jan 2025 |
| 1334 | MIDLAND | Glacier County, MT | Gas Property | Jan 2025 |
| 1335 | MIDLAND | Toole County, MT | Oil Property | Jan 2025 |
| 1336 | MIDLAND REALTY | Toole County, MT | Gas Property | Feb 2025 |
| 1337 | MILES | Toole County, MT | Oil Property | Oct 2021 |
| 1338 | MILES | Liberty County, MT | Gas Property | Feb 2025 |
| 1339 | MILLER | Sheridan County, MT | Oil & Gas Property | May 2019 |
| 1340 | MILLER | Toole County, MT | Gas Property | Feb 2025 |
| 1341 | MILLER | Glacier County, MT | Oil Property | Jan 2025 |
| 1342 | MILLER | Stillwater County, MT | Gas Property | Apr 1992 |
| 1343 | MILLER | Richland County, MT | Oil & Gas Property | Mar 2015 |
| 1344 | MILLER GIRLS FEDERAL 2758 42-7H | Roosevelt County, MT | Oil & Gas Property | Feb 2025 |
| 1345 | MLFU | Phillips County, MT | Gas Property | Apr 2019 |
| 1346 | MODDRELL | Stillwater County, MT | Gas Property | Nov 1989 |
| 1347 | MOE 1 | Toole County, MT | Oil Property | Jul 2023 |
| 1348 | MOFFAT | Toole County, MT | Gas Property | Feb 2025 |
| 1349 | MOFFATT | Toole County, MT | Gas Property | Apr 2024 |
| 1350 | MOFFATT | Toole County, MT | Gas Property | Jul 1991 |
| 1351 | MONARCH | Fallon County, MT | Oil & Gas Property | Dec 2011 |
| 1352 | MONARCH | Fallon County, MT | Oil & Gas Property | Feb 2025 |
| 1353 | MONDAK WEST FED 1 | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1354 | MONDALIN | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1355 | MONSON | Toole County, MT | Oil & Gas Property | Jan 2025 |
| 1356 | MONTANA A | Pondera County, MT | Oil Property | Jan 2025 |
| 1357 | MONTANA F | Musselshell County, MT | Oil & Gas Property | Jan 2003 |
| 1358 | MOORE | Blaine County, MT | Gas Property | Feb 2025 |
| 1359 | MOORE | Blaine County, MT | Gas Property | Feb 2025 |
| 1360 | MOORE | Blaine County, MT | Gas Property | Feb 2025 |
| 1361 | MOORE (23-24 | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1362 | MORASKO 41-25H 43 | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1363 | MORGAN ( | Glacier County, MT | Gas Property | Feb 2025 |
| 1364 | MORGAN 3 | Blaine County, MT | Gas Property | May 2017 |
| 1365 | MORKEN | Sheridan County, MT | Oil & Gas Property | Feb 2025 |
| 1366 | MORRIS | Musselshell County, MT | Oil Property | Aug 1993 |
| 1367 | MORRIS | Toole County, MT | Gas Property | Jan 2025 |
| 1368 | MORRIS | Teton County, MT | Oil Property | Feb 2025 |
| 1369 | MORSE | Hill County, MT | Gas Property | Feb 2025 |
| 1370 | MORSE | Hill County, MT | Gas Property | Feb 2025 |
| 1371 | MORTON | Toole County, MT | Oil & Gas Property | Jan 2025 |
| 1372 | MOSQUITO | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1373 | MOSSER | Yellowstone County, MT | Oil Property | Mar 2025 |
| 1374 | MOTT 1-16H | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1375 | MOULTON | Toole County, MT | Oil & Gas Property | Feb 2025 |
| 1376 | MPC/UNOCAL | Toole County, MT | Gas Property | Nov 2024 |
| 1377 | MRFU | Phillips County, MT | Gas Property | Apr 2019 |
| 1378 | MT INDUSTRIAL (1 | Carbon County, MT | Gas Property | May 2024 |
| 1379 | MT ROYALTY | Big Horn County, MT | Gas Property | Jun 2019 |
| 1380 | MT STATE "D" | Dawson County, MT | Oil & Gas Property | Feb 2025 |
| 1381 | MUD LAKE | Hill County, MT | Gas Property | Oct 2012 |
| 1382 | MUELLER | Blaine County, MT | Gas Property | Feb 2025 |
| 1383 | MUELLER | Blaine County, MT | Gas Property | Nov 2024 |
| 1384 | MULDER 22-15 | Roosevelt County, MT | Oil & Gas Property | Feb 2025 |
| 1385 | MULHOLLAND FEDERAL 1-32H | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1386 | MULLIN | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1387 | MULLIN 21-24 | Richland County, MT | Oil & Gas Property | Feb 2025 |
| 1388 | MUNSON | Teton County, MT | Oil Property | Jun 2024 |
| 1389 | MUNTZING | Glacier County, MT | Oil & Gas Property | Feb 2025 |
| 1390 | MURDOCK | Phillips County, MT | Gas Property | Feb 2025 |
| 1391 | MURPHY | Bowman County, ND | Oil & Gas Property | Jan 2009 |
| 1392 | MURRILLS | Toole County, MT | Gas Property | Jan 2025 |
| 1393 | MWCBSU | Glacier County, MT | Oil Property | Dec 1994 |
| 1394 | MYERS | Musselshell County, MT | Oil Property | Dec 2018 |
| 1395 | MYSTERY CREEK | Fallon County, MT | Oil & Gas Property | Feb 2025 |
| 1396 | N E ST S U | Rosebud County, MT | Oil Property | Feb 2025 |
| 1397 | N. PINE UNIT | Prairie County, MT | Oil & Gas Property | Feb 2025 |
| 1398 | N.W. BATTLE | Blaine County, MT | Gas Property | Dec 2023 |
| 1399 | NADEAU | Toole County, MT | Gas Property | Mar 2019 |
| 1400 | NADEAU | Toole County, MT | Gas Property | Feb 2025 |