Door Systems of Montana Great Falls LLC | Great Falls | — | ◐ LIKELY ACTIVE |
Imperium Tool & Instrument, INC. | Butte | — | ◐ LIKELY ACTIVE |
Lawrence Hancock Jr | Victor | — | ◐ LIKELY ACTIVE |
Shield Arms LLC | Bigfork | — | ◐ LIKELY ACTIVE |
| AMApex Manufacturing Services, LTD | Billings | — | ◇ UNVERIFIED |
| BHBoeing Helena | Helena | — | ◐ LIKELY ACTIVE |
| CSC Sharps Arms CO INC | Big Timber | — | ◐ LIKELY ACTIVE |
| FIFirstharvest, INC. Dba Montana Steel Industries | Belgrade | 20–99 | ◐ LIKELY ACTIVE |
| MRMontana Railroad Services, INC | Joliet | — | ◐ LIKELY ACTIVE |
| SSShiloh Sharps | Big Timber | — | ◐ LIKELY ACTIVE |
| ASAmerican Steel | Billings | — | ◐ LIKELY ACTIVE |
| DMDefiance Machine INC | Columbia Falls | — | ◐ LIKELY ACTIVE |
| HPH-e Parts International, Mining Solutions INC. | Billings | — | ◐ LIKELY ACTIVE |
| AAA and S Industries | Poplar | — | ◇ UNVERIFIED |
| AIAdf Industrial Coatings | Great Falls | — | ◇ UNVERIFIED |
| AIAllison Industries INC | Great Falls | — | ◇ UNVERIFIED |
| APArmor Powder Coating | Missoula | — | ◇ UNVERIFIED |
| BLBay LTD | Billings | — | ◇ UNVERIFIED |
| BSBig Sky Racks INC | Bozeman | — | ◇ UNVERIFIED |
| CICoatings INC Riverside | Billings | — | ◇ UNVERIFIED |
| CMCompatible Manufacturing INC | Marion | — | ◇ UNVERIFIED |
| DIDecorative Industrial Plating LLC | Helena | — | ◇ UNVERIFIED |
| FLFinishing Lab, LLC | Bozeman | — | ◇ UNVERIFIED |
| IIIronhaus INC | Hamilton | — | ◇ UNVERIFIED |
| JKJ K Fabrication & Supply LLC | Butte | — | ◇ UNVERIFIED |
| KMKnick Machining | Bozeman | — | ◇ UNVERIFIED |
| PCPowder Coating of Montana Belgrade | Belgrade | — | ◇ UNVERIFIED |
| PMPrecious Metals Plating Hud | Bonner | — | ◇ UNVERIFIED |
| SASpectrum Aquatics | Missoula | — | ◇ UNVERIFIED |
| AEAcm Elite, LLC | Stevensville | — | ◐ LIKELY ACTIVE |
| APAdvanced Products, LLC | Kalispell | — | ◐ LIKELY ACTIVE |
| AFAnaconda Foundry Fabrication Co. Inc | Anaconda | 20–99 | ◐ LIKELY ACTIVE |
| AIAp Industries, INC | Billings | — | ◐ LIKELY ACTIVE |
Atomic Industries LLC | Billings | 20–99 | ◐ LIKELY ACTIVE |
| BBelgrade | Belgrade | 1–19 | ◐ LIKELY ACTIVE |
| B1Branch 16 - Billings | Billings | 1–19 | ◐ LIKELY ACTIVE |
| B1Branch 19 - Missoula | Missoula | 1–19 | ◐ LIKELY ACTIVE |
| BJBrian Jones | Geraldine | — | ◐ LIKELY ACTIVE |
| CCColin Campbell | Great Falls | — | ◐ LIKELY ACTIVE |
| CMCommercial Machine Services, INC | Kalispell | — | ◐ LIKELY ACTIVE |
| CFConsolidated Fuel and Iron LLC | Lakeside | — | ◐ LIKELY ACTIVE |
| CSContinental Steel Works, INC. | Butte | — | ◐ LIKELY ACTIVE |
| CMCustom Machining Industries INC | Missoula | — | ◐ LIKELY ACTIVE |
| DDDamon Designs, INC | Kalispell | — | ◐ LIKELY ACTIVE |
| FWFirst Wave Fabrication, LLC | Helena | — | ◐ LIKELY ACTIVE |
| GDGcdl Defense LLC | Plevna | — | ◐ LIKELY ACTIVE |
| GMGlacier Machining Solutions, INC. | Columbia Falls | — | ◐ LIKELY ACTIVE |
| HAH a Burrow Pattern Works, INC. | Joliet | — | ◐ LIKELY ACTIVE |
| HMHardwear Manufacturing INC | Ryegate | — | ◐ LIKELY ACTIVE |
| HPH-E Parts International - MSUSA | Billings | 20–99 | ◐ LIKELY ACTIVE |