| HSHelena Sand & Gravel | Helena | MT | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| HWHilltop Welding | Sidney | MT | Machinery Manufacturing333992 | — | ◇ UNVERIFIED |
| HWHilltop Welding | Sidney | MT | Machinery Manufacturing333992 | — | ◇ UNVERIFIED |
 Idaho Forest Group- St. Regis | Saint Regis | MT | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| IIIda, INC. | Heron | MT | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| IGIndustrial Gas Distributors | Billings | MT | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| IPInnovative Postal Services | Great Falls | MT | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| ILIntellimet LLC | Missoula | MT | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| ITIntercontinental Truck Body, INC | Conrad | MT | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| IBIps Billings | Billings | MT | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| JCJ4k Corporation | Helena | MT | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| JBJason Bohnsack | Columbia Falls | MT | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| JJjj | Missoula | MT | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| JBJohnson Brothers Contracting | Eureka | MT | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| JLJohnson Lumber Company | Eureka | MT | Wood Product Manufacturing321912 | — | ◇ UNVERIFIED |
| JMJohnson Metal Works LLC | Bozeman | MT | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| JMJohnson Metal Works LLC | Bozeman | MT | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| JCJore Corporation | Ronan | MT | Machinery Manufacturing333991 | — | ◇ UNVERIFIED |
| JCJore Corporation | Ronan | MT | Fabricated Metal Product Manufacturing332212 | — | ◇ UNVERIFIED |
| JPJTech Precision Machining | Broadus | MT | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| JGJtl Group INC. | Belgrade | MT | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| JGJtl Group INC - 031-0001 | Bozeman | MT | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| JGJtl Group INC - Target Range | Missoula | MT | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| KSK2 Stone (montana) LLC | Kalispell | MT | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| KKKagiyama Kitchens LLC | Saint Ignatius | MT | Food Manufacturing311421 | — | ◇ UNVERIFIED |
| KTKalispell Truss Center, INC. | Kalispell | MT | Wood Product Manufacturing321214 | — | ◇ UNVERIFIED |
| KDKalmont Distributors INC | Kalispell | MT | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| KLKdna Life Sciences LLC | Belgrade | MT | Miscellaneous Manufacturing339114 | — | ◇ UNVERIFIED |
| KLKearney Logging & Sawmill | Eureka | MT | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| KLKlingler Lumber | Kalispell | MT | Wood Product Manufacturing321912 | — | ◇ UNVERIFIED |
| KSKopi Shak Plus | Belgrade | MT | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| KHKozba Holdings LLC | Billings | MT | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KXK x 2 CORPORATION | Helena | MT | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| LFLakeland Feed & Supply | Hamilton | MT | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| LRLand & Resource Management INC. | Kalispell | MT | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| LLLaurel Lfm East | Laurel | MT | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| LMLawton Machine | Dillon | MT | Fabricated Metal Product Manufacturing332995 | — | ◇ UNVERIFIED |
| LILehrkinds, INC. | Helena | MT | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| LML.f. Manufacturing, INC. | Laurel | MT | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| LCLinley's Cabinet Company INC. | Victor | MT | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| LPLittle Pink Farm House LLC | Three Forks | MT | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| LLLongball, LLC | Billings | MT | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| LMLuck-e-g Montana, INC | Libby | MT | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| MLMaDFoods, LLC | Bozeman | MT | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| MRMadison River Custom Works | Three Forks | MT | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| MCMarsich Crane, INC | Billings | MT | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| MCMartel Construction, INC. | Missoula | MT | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| MCMasterwork Components Inc | Kalispell | MT | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
 Mesa Laboratories, INC. | Bozeman | MT | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| MMMidland Mechanical, INC. | Billings | MT | Fabricated Metal Product Manufacturing332996 | — | ◇ UNVERIFIED |
