| 1301 | MARMONT | Toole County, MT | Gas Property | Feb 2024 |
| 1302 | MARRA | Hill County, MT | Gas Property | Jun 1996 |
| 1303 | MARSH | Stillwater County, MT | Gas Property | Jan 1991 |
| 1304 | MARSH | Blaine County, MT | Gas Property | Mar 2024 |
| 1305 | MARTIN | Pondera County, MT | Oil Property | Dec 1999 |
| 1306 | MARTIN | Toole County, MT | Oil Property | Aug 2023 |
| 1307 | MARTIN | Teton County, MT | Oil Property | Mar 2024 |
| 1308 | MARTIN 1-2 | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1309 | MARVIN 14B-26 | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1310 | MARVIN 2-11-14 | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1311 | MARY REED | Big Horn County, MT | Oil Property | Feb 2024 |
| 1312 | MARY WILSON 10-3H | Roosevelt County, MT | Oil & Gas Property | Mar 2024 |
| 1313 | MASON | Roosevelt County, MT | Oil Property | Mar 1994 |
| 1314 | MATADOR | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1315 | MATADOR FEDERAL 2658 43-7H | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1316 | MATHER | Glacier County, MT | Gas Property | Mar 2024 |
| 1317 | MATTHEW 1-31H | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1318 | MAUGHAN | Toole County, MT | Oil Property | Oct 1992 |
| 1319 | MAVENCAMP | Phillips County, MT | Gas Property | Mar 2024 |
| 1320 | MAYSON PHOENIX 17-20 | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1321 | MCALPINE | Glacier County, MT | Oil Property | Mar 2024 |
| 1322 | MCALPINE | Toole County, MT | Gas Property | Mar 2024 |
| 1323 | MCCABE | Roosevelt County, MT | Oil & Gas Property | Mar 2024 |
| 1324 | MCCARTER | Toole County, MT | Gas Property | Feb 2024 |
| 1325 | MCCORMICK | Toole County, MT | Oil Property | Nov 2001 |
| 1326 | MCCRACKEN | Pondera County, MT | Gas Property | Jan 2024 |
| 1327 | MCCRACKEN 2758 | Roosevelt County, MT | Oil & Gas Property | Mar 2024 |
| 1328 | MCCUTCHEON | Toole County, MT | Oil & Gas Property | Jan 2024 |
| 1329 | MCCUTCHIN-WILLIAMS 2 | Powder River County, MT | Oil & Gas Property | Mar 2024 |
| 1330 | MCDONALD CREEK | Petroleum County, MT | Oil Property | Mar 2004 |
| 1331 | MCDONOUGH | Toole County, MT | Gas Property | Feb 2024 |
| 1332 | MCDOWELL | Liberty County, MT | Oil Property | Mar 2024 |
| 1333 | MCFARLAND | Pondera County, MT | Gas Property | Dec 2023 |
| 1334 | MCGINNIS | Richland County, MT | Oil & Gas Property | Feb 2024 |
| 1335 | MCGOWAN | Roosevelt County, MT | Oil Property | Mar 2024 |
| 1336 | MCGREGOR-NADEAU | Toole County, MT | Gas Property | Feb 2024 |
| 1337 | MCGUINNESS | Glacier County, MT | Oil & Gas Property | Mar 2024 |
| 1338 | MCHALE-SCHILTZ | Toole County, MT | Oil & Gas Property | Jun 2023 |
| 1339 | MCHENRY | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1340 | MCINTOSH | Hill County, MT | Gas Property | Oct 2006 |
| 1341 | MCKECHNIE | Toole County, MT | Gas Property | Feb 2024 |
| 1342 | MCKEE | Toole County, MT | Oil Property | Mar 2024 |
| 1343 | MCKEE | Toole County, MT | Oil Property | Jul 2019 |
| 1344 | MCKEE | Toole County, MT | Oil & Gas Property | Dec 2002 |
| 1345 | MCKINNON | Sheridan County, MT | Oil & Gas Property | May 2022 |
| 1346 | MCLEISH 1 | Blaine County, MT | Gas Property | Mar 2024 |
| 1347 | MCMANUS | Toole County, MT | Oil & Gas Property | Mar 2024 |
| 1348 | MCMILLEN | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1349 | MCNAMER | Toole County, MT | Gas Property | Mar 2024 |
| 1350 | MCNAMER | Toole County, MT | Oil Property | Oct 1995 |
| 1351 | MCQUIGG | Liberty County, MT | Gas Property | Feb 2024 |
| 1352 | MCSLOY | Hill County, MT | Gas Property | Mar 2024 |
| 1353 | MCVAY | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1354 | MEINS | Stillwater County, MT | Gas Property | Mar 2024 |
| 1355 | MEISSNER | Liberty County, MT | Gas Property | Feb 2024 |
| 1356 | MEISSNER | Liberty County, MT | Oil & Gas Property | Feb 2024 |
| 1357 | MELBY | Sheridan County, MT | Oil & Gas Property | Mar 2024 |
| 1358 | MELBY | Sheridan County, MT | Oil & Gas Property | Mar 2024 |
| 1359 | MELDAHL | Richland County, MT | Oil & Gas Property | Jan 2024 |
| 1360 | MELVIN | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1361 | MERCER | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1362 | MERCY FEDERAL 2759 44-11B | Roosevelt County, MT | Oil & Gas Property | Mar 2024 |
| 1363 | MERRILL | Richland County, MT | Oil & Gas Property | Apr 2024 |
| 1364 | MERRITT | Fallon County, MT | Oil & Gas Property | Mar 2024 |
| 1365 | MESA-FE | Rosebud County, MT | Oil & Gas Property | Aug 2019 |
| 1366 | METZGER | Hill County, MT | Gas Property | Mar 2024 |
| 1367 | MEULI | Pondera County, MT | Gas Property | Aug 2023 |
| 1368 | MICHAEL 1-27H | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1369 | MICHAELS | Glacier County, MT | Gas Property | Mar 2024 |
| 1370 | MICHELS | Wibaux County, MT | Oil & Gas Property | Mar 2024 |
| 1371 | MIDLAND | Glacier County, MT | Gas Property | May 2023 |
| 1372 | MIDLAND | Toole County, MT | Oil Property | Mar 2024 |
| 1373 | MIDLAND REALTY | Toole County, MT | Gas Property | Mar 2024 |
| 1374 | MILES | Toole County, MT | Oil Property | Oct 2021 |
| 1375 | MILES | Liberty County, MT | Gas Property | Mar 2024 |
| 1376 | MILLER | Sheridan County, MT | Oil & Gas Property | May 2019 |
| 1377 | MILLER | Toole County, MT | Gas Property | Feb 2024 |
| 1378 | MILLER | Glacier County, MT | Oil Property | Mar 2024 |
| 1379 | MILLER | Stillwater County, MT | Gas Property | Apr 1992 |
| 1380 | MILLER | Richland County, MT | Oil & Gas Property | Mar 2015 |
| 1381 | MILLER GIRLS FEDERAL 2758 42-7H | Roosevelt County, MT | Oil & Gas Property | Mar 2024 |
| 1382 | MISKE 11-60 3C-3-1 | Wibaux County, MT | Oil & Gas Property | Apr 2024 |
| 1383 | MLFU | Phillips County, MT | Gas Property | Apr 2019 |
| 1384 | MOE 1 | Toole County, MT | Oil Property | Jul 2023 |
| 1385 | MOFFAT | Toole County, MT | Gas Property | Mar 2024 |
| 1386 | MOFFATT | Toole County, MT | Gas Property | Feb 2024 |
| 1387 | MONARCH | Fallon County, MT | Oil & Gas Property | Dec 2011 |
| 1388 | MONARCH | Fallon County, MT | Oil & Gas Property | Mar 2024 |
| 1389 | MONDAK WEST FED 1 | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1390 | MONDALIN | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1391 | MONSON | Toole County, MT | Oil & Gas Property | Mar 2024 |
| 1392 | MONTANA A | Pondera County, MT | Oil Property | Jan 2024 |
| 1393 | MONTANA F | Musselshell County, MT | Oil & Gas Property | Jan 2003 |
| 1394 | MOORE | Blaine County, MT | Gas Property | Mar 2024 |
| 1395 | MOORE | Blaine County, MT | Gas Property | Mar 2024 |
| 1396 | MOORE | Blaine County, MT | Gas Property | Mar 2024 |
| 1397 | MOORE (23-24 | Richland County, MT | Oil & Gas Property | Mar 2024 |
| 1398 | MORGAN 3 | Blaine County, MT | Gas Property | May 2017 |
| 1399 | MORKEN | Sheridan County, MT | Oil & Gas Property | Mar 2024 |
| 1400 | MORRIS | Musselshell County, MT | Oil Property | Aug 1993 |