| 1301 | MARTIN | Pondera County, MT | Oil Property | Dec 1999 |
| 1302 | MARTIN | Toole County, MT | Oil Property | May 2025 |
| 1303 | MARTIN | Teton County, MT | Oil Property | Apr 2025 |
| 1304 | MARTIN 1-2 | Richland County, MT | Oil & Gas Property | May 2025 |
| 1305 | MARVIN 14B-26 | Richland County, MT | Oil & Gas Property | May 2025 |
| 1306 | MARVIN 2-11-14 | Richland County, MT | Oil & Gas Property | May 2025 |
| 1307 | MARY REED | Big Horn County, MT | Oil Property | May 2025 |
| 1308 | MARY WILSON 10-3H | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 1309 | MASON | Roosevelt County, MT | Oil Property | Mar 1994 |
| 1310 | MATADOR | Richland County, MT | Oil & Gas Property | May 2025 |
| 1311 | MATADOR FEDERAL 2658 43-7H | Richland County, MT | Oil & Gas Property | May 2025 |
| 1312 | MATHER | Glacier County, MT | Gas Property | May 2025 |
| 1313 | MATTHEW 1-31H | Richland County, MT | Oil & Gas Property | May 2025 |
| 1314 | MAUGHAN | Toole County, MT | Oil Property | Oct 1992 |
| 1315 | MAVENCAMP | Phillips County, MT | Gas Property | Apr 2025 |
| 1316 | MAYSON PHOENIX 17-20 | Richland County, MT | Oil & Gas Property | May 2025 |
| 1317 | MCALPINE | Glacier County, MT | Oil Property | Mar 2025 |
| 1318 | MCALPINE | Toole County, MT | Gas Property | May 2025 |
| 1319 | MCCABE | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 1320 | MCCARTER | Toole County, MT | Gas Property | Mar 2025 |
| 1321 | MCCORMICK | Toole County, MT | Oil Property | Nov 2001 |
| 1322 | MCCRACKEN | Pondera County, MT | Gas Property | Oct 2024 |
| 1323 | MCCRACKEN 2758 | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 1324 | MCCUTCHEON | Toole County, MT | Oil & Gas Property | Apr 2025 |
| 1325 | MCCUTCHIN-WILLIAMS 2 | Powder River County, MT | Oil & Gas Property | Mar 2025 |
| 1326 | MCDONALD CREEK | Petroleum County, MT | Oil Property | Mar 2004 |
| 1327 | MCDONOUGH | Toole County, MT | Gas Property | Mar 2025 |
| 1328 | MCDOWELL | Liberty County, MT | Oil Property | Mar 2025 |
| 1329 | MCFARLAND | Pondera County, MT | Gas Property | Feb 2025 |
| 1330 | MCGINNIS | Richland County, MT | Oil & Gas Property | Mar 2025 |
| 1331 | MCGOWAN | Roosevelt County, MT | Oil Property | Nov 2024 |
| 1332 | MCGREGOR-NADEAU | Toole County, MT | Gas Property | Nov 2024 |
| 1333 | MCGUINNESS | Glacier County, MT | Oil & Gas Property | May 2025 |
| 1334 | MCHALE-SCHILTZ | Toole County, MT | Oil & Gas Property | Oct 2024 |
| 1335 | MCHENRY | Richland County, MT | Oil & Gas Property | May 2025 |
| 1336 | MCINTOSH | Hill County, MT | Gas Property | Apr 2007 |
| 1337 | MCKECHNIE | Toole County, MT | Gas Property | Mar 2025 |
| 1338 | MCKEE | Toole County, MT | Oil Property | Apr 2025 |
| 1339 | MCKEE | Toole County, MT | Oil Property | Jul 2019 |
| 1340 | MCKEE | Toole County, MT | Oil & Gas Property | Dec 2002 |
| 1341 | MCKINNON | Sheridan County, MT | Oil & Gas Property | May 2022 |
| 1342 | MCLEISH 1 | Blaine County, MT | Gas Property | May 2025 |
| 1343 | MCMANUS | Toole County, MT | Oil & Gas Property | May 2025 |
| 1344 | MCNAMER | Toole County, MT | Gas Property | Mar 2025 |
| 1345 | MCNAMER | Toole County, MT | Oil Property | Oct 1995 |
| 1346 | MCQUIGG | Liberty County, MT | Gas Property | Apr 2025 |
| 1347 | MCSLOY | Hill County, MT | Gas Property | May 2025 |
| 1348 | MCVAY | Richland County, MT | Oil & Gas Property | Mar 2025 |
| 1349 | MEAGHER 16-30 | Sheridan County, MT | Oil & Gas Property | May 2025 |
| 1350 | MEINS | Stillwater County, MT | Gas Property | Apr 2024 |
| 1351 | MEISSNER | Liberty County, MT | Gas Property | Feb 2025 |
| 1352 | MEISSNER | Liberty County, MT | Oil & Gas Property | May 2025 |
| 1353 | MELBY | Sheridan County, MT | Oil & Gas Property | Apr 2025 |
| 1354 | MELBY | Sheridan County, MT | Oil & Gas Property | May 2025 |
| 1355 | MELDAHL | Richland County, MT | Oil & Gas Property | May 2025 |
| 1356 | MELVIN | Richland County, MT | Oil & Gas Property | May 2025 |
| 1357 | MERCER | Richland County, MT | Oil & Gas Property | May 2025 |
| 1358 | MERCY FEDERAL 2759 44-11B | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 1359 | MERRILL | Richland County, MT | Oil & Gas Property | Apr 2025 |
| 1360 | MERRITT | Fallon County, MT | Oil & Gas Property | May 2025 |
| 1361 | MESA-FE | Rosebud County, MT | Oil & Gas Property | Dec 2024 |
| 1362 | METZGER | Hill County, MT | Gas Property | May 2025 |
| 1363 | MEULI | Pondera County, MT | Gas Property | Oct 2024 |
| 1364 | MICHAEL 1-27H | Richland County, MT | Oil & Gas Property | May 2025 |
| 1365 | MICHAELS | Glacier County, MT | Gas Property | May 2025 |
| 1366 | MICHELS | Wibaux County, MT | Oil & Gas Property | May 2025 |
| 1367 | MIDLAND | Glacier County, MT | Gas Property | Apr 2025 |
| 1368 | MIDLAND | Toole County, MT | Oil Property | Mar 2025 |
| 1369 | MIDLAND REALTY | Toole County, MT | Gas Property | May 2025 |
| 1370 | MILES | Toole County, MT | Oil Property | Oct 2021 |
| 1371 | MILES | Liberty County, MT | Gas Property | May 2025 |
| 1372 | MILLER | Sheridan County, MT | Oil & Gas Property | May 2019 |
| 1373 | MILLER | Toole County, MT | Gas Property | May 2025 |
| 1374 | MILLER | Glacier County, MT | Oil Property | Mar 2025 |
| 1375 | MILLER | Stillwater County, MT | Gas Property | Apr 1992 |
| 1376 | MILLER | Richland County, MT | Oil & Gas Property | Mar 2015 |
| 1377 | MILLER GIRLS FEDERAL 2758 42-7H | Roosevelt County, MT | Oil & Gas Property | May 2025 |
| 1378 | MISKE 11-60 3C-3-1 | Wibaux County, MT | Oil & Gas Property | Apr 2025 |
| 1379 | MLFU | Phillips County, MT | Gas Property | Apr 2019 |
| 1380 | MOE 1 | Toole County, MT | Oil Property | Jul 2023 |
| 1381 | MOFFAT | Toole County, MT | Gas Property | May 2025 |
| 1382 | MOFFATT | Toole County, MT | Gas Property | Jan 2025 |
| 1383 | MOFFATT | Toole County, MT | Gas Property | Jul 1991 |
| 1384 | MONARCH | Fallon County, MT | Oil & Gas Property | Dec 2011 |
| 1385 | MONARCH | Fallon County, MT | Oil & Gas Property | May 2025 |
| 1386 | MONDAK WEST FED 1 | Richland County, MT | Oil & Gas Property | May 2025 |
| 1387 | MONDALIN | Richland County, MT | Oil & Gas Property | May 2025 |
| 1388 | MONSON | Toole County, MT | Oil & Gas Property | May 2025 |
| 1389 | MONTANA A | Pondera County, MT | Oil Property | Mar 2025 |
| 1390 | MONTANA F | Musselshell County, MT | Oil & Gas Property | Jan 2003 |
| 1391 | MOORE | Blaine County, MT | Gas Property | May 2025 |
| 1392 | MOORE | Blaine County, MT | Gas Property | May 2025 |
| 1393 | MOORE | Blaine County, MT | Gas Property | May 2025 |
| 1394 | MOORE (23-24 | Richland County, MT | Oil & Gas Property | May 2025 |
| 1395 | MOOSE FALLS 29-31H | Richland County, MT | Oil Property | May 2025 |
| 1396 | MORASKO 41-25H 43 | Richland County, MT | Oil & Gas Property | May 2025 |
| 1397 | MORGAN ( | Glacier County, MT | Gas Property | May 2025 |
| 1398 | MORGAN 3 | Blaine County, MT | Gas Property | May 2017 |
| 1399 | MORKEN | Sheridan County, MT | Oil & Gas Property | May 2025 |
| 1400 | MORRIS | Musselshell County, MT | Oil Property | Aug 1993 |