| Property Name | Property Location | Property Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | OBERGFELL | Richland County, MT | Oil & Gas Property | Jan 2026 |
| 2 | OBIE | Blaine County, MT | Gas Property | Jan 2026 |
| 3 | OCONNEL | Blaine County, MT | Gas Property | Jan 2026 |
| 4 | OIEN-FEE | Toole County, MT | Oil Property | Sep 2025 |
| 5 | OLD BORDER | Toole County, MT | Oil Property | Feb 2026 |
| 6 | OLDHAM | Petroleum County, MT | Oil Property | Jan 2015 |
| 7 | OLFERT | Valley County, MT | Oil & Gas Property | Feb 2019 |
| 8 | OLIVE-LESUEUR 27-4H | Richland County, MT | Oil & Gas Property | Jan 2026 |
| 9 | OLOUGHLIN | Toole County, MT | Gas Property | Dec 2025 |
| 10 | OLSON | Chouteau County, MT | Gas Property | Jan 2026 |
| 11 | OLSON | Hill County, MT | Gas Property | Jan 2026 |
| 12 | OLSON | Sheridan County, MT | Oil Property | Dec 2012 |
| 13 | OLSON | Blaine County, MT | Gas Property | Jan 2026 |
| 14 | OLSON | Richland County, MT | Oil & Gas Property | Jan 2026 |
| 15 | OLSON | Roosevelt County, MT | Oil & Gas Property | Jan 2026 |
| 16 | OLSON JENSEN | Petroleum County, MT | Oil Property | Sep 1993 |
| 17 | OLSON-JENNY | Toole County, MT | Gas Property | Nov 2025 |
| 18 | ONEIL | Blaine County, MT | Gas Property | Jan 2026 |
| 19 | ONEILL | Rosebud County, MT | Oil Property | Nov 2025 |
| 20 | ONSTAD | Sheridan County, MT | Oil & Gas Property | Jan 2026 |
| 21 | ORVILLE HENDRICKSON 24-12H | Sheridan County, MT | Oil & Gas Property | Jan 2026 |
| 22 | OSBORN 1-34H | Richland County, MT | Oil & Gas Property | Jan 2026 |
| 23 | OSCAR | Richland County, MT | Oil & Gas Property | Jan 2026 |
| 24 | OSLER (1 | Liberty County, MT | Gas Property | Jan 2026 |
| 25 | OSTBY | Sheridan County, MT | Oil & Gas Property | Dec 2025 |
| 26 | OSWOOD | Liberty County, MT | Gas Property | Jan 2026 |
| 27 | OSWOOD | Liberty County, MT | Gas Property | Jan 2026 |
| 28 | OTIS 2658 43-23H | Richland County, MT | Oil & Gas Property | Jan 2026 |
| 29 | OTTMAN | Rosebud County, MT | Oil Property | Oct 2023 |
| 30 | OUTLOOK | Sheridan County, MT | Oil & Gas Property | Aug 1996 |
| 31 | OVERBY | Toole County, MT | Gas Property | Nov 2025 |