| CIChs INC Laurel Refinery | Laurel | 100–499 | ● ACTIVE |
| P6Phillips 66 - Billings Refinery | Billings | 100–499 | ● ACTIVE |
 Calumet Montana Refining, LLC | Great Falls | — | ● ACTIVE |
| GFGreat Falls Renewable Diesel Plant | Great Falls | — | ◐ LIKELY ACTIVE |
| PMPar Montana, LLC - Billings Refinery | Billings | — | ◐ LIKELY ACTIVE |
| JGJtl Group Belgrade Dba Knife River - Belgrade | Belgrade | — | ◇ UNVERIFIED |
| KMKoch Materials CO Billings | Billings | — | ◇ UNVERIFIED |
| LRLaurel Refinery | Laurel | 100–499 | ◐ LIKELY ACTIVE |
 Treasure State Concrete, INC. | Polson | — | ◐ LIKELY ACTIVE |
| EAErgon Asphalt & Emulsions, INC. - Butte | Butte | — | ◇ UNVERIFIED |
| JGJtl Group Billings (dba - Knife River Billings) | Billings | — | ◇ UNVERIFIED |
| JGJtl Group-wilkie Street | Missoula | — | ◇ UNVERIFIED |
| KRKnife River - 777-2699 | Kalispell | — | ◇ UNVERIFIED |
| KRKnife River Billings East Site | Billings | — | ◇ UNVERIFIED |
| NINupac, INC - a Division of Helena Sand & Gravel | Kalispell | — | ◇ UNVERIFIED |
| RCRiverside Contracting - 3046 | Missoula | — | ◇ UNVERIFIED |
| SCSchellinger Construction - 3045 | Hamilton | — | ◇ UNVERIFIED |
| TSTri State Recycling Services INC | Worden | — | ◇ UNVERIFIED |
| UMUnited Mat'ls Missouri River Gravel Pit | Great Falls | — | ◇ UNVERIFIED |
| PMPar Montana Refinery, LLC | Billings | 100–499 | ◐ LIKELY ACTIVE |
| PRP & R Mummey, INC. | Malta | — | ◐ LIKELY ACTIVE |
| QFQb Fueling, INC | Frenchtown | — | ◐ LIKELY ACTIVE |
| MFMarchi Family Enterprises LLC | Bozeman | — | ◐ LIKELY ACTIVE |
| SESafer Environmental Lubricants, INC | Fort Benton | — | ◐ LIKELY ACTIVE |
| B0Blankenship - 093-0012 | Butte | — | ◇ UNVERIFIED |
| C0Century - 021-0002 | Glendive | — | ◇ UNVERIFIED |
| C0Century - 027-0004 | Lewistown | — | ◇ UNVERIFIED |
| CIChs, INC. | Laurel | — | ◇ UNVERIFIED |
| COCity of Wolf Point Asphalt Plant | Wolf Point | — | ◇ UNVERIFIED |
| FLFlynn Lane - 063-0012 | Missoula | — | ◇ UNVERIFIED |
| GEGilman Excavating - 777-2543 | Butte | — | ◇ UNVERIFIED |
| HCHardrives Construction INC | Billings | — | ◇ UNVERIFIED |
| HSHelena Sand & Gravel | Helena | — | ◇ UNVERIFIED |
| JGJtl Group INC - 031-0001 | Bozeman | — | ◇ UNVERIFIED |
| JGJtl Group INC - Target Range | Missoula | — | ◇ UNVERIFIED |
| MMMontana Materials and Construction Black Eagle | Great Falls | — | ◇ UNVERIFIED |
| MAMr Asphalt, INC. | Corvallis | — | ◇ UNVERIFIED |
| NFNwpmg00002 Former Texaco Sunburst Works | Sunburst | — | ◇ UNVERIFIED |
| RCRiverside Contracting - 063-0049 | Seeley Lake | — | ◇ UNVERIFIED |
| RMRocky Mountain Asphalt, LLC | Belgrade | — | ◇ UNVERIFIED |
| SCSchellinger Construction CO. INC. | Seeley Lake | — | ◇ UNVERIFIED |
 Western Emulsions Plant | Billings | — | ◇ UNVERIFIED |
