| JMJ&e Metal Fabricators INC | Metuchen | NJ | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| JPJet Precision Metal Inc. | Hawthorne | NJ | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| JFJ.m. Fabrication Company, LLC | Arlington | TX | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| JSJnl Steel Components INC | Seminole | TX | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| KMKemlee Manufacturing INC | Galena | KS | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| KIKieschnick Industries | Beaumont | TX | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| KLKinmetal LLC. | Alpharetta | GA | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| KKuest | San Antonio | TX | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| KSKy State Reformatory | La Grange | KY | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| LCLabconco Corporation-labconco Corporation | Kansas City | MO | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| LSLaurel Sheet Metal Products, INC | N Hollywood | CA | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| LILdi Industries - Huntley | Huntley | IL | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| LMLeatherwood Manufacturing INC | North Charleston | SC | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| LMLindblade Metalworks INC | La Mirada | CA | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| LILinx Industries, INC. | Portsmouth | VA | Fabricated Metal Product Manufacturing332322 | 100-499 | ◐ LIKELY ACTIVE |
| LPLionshead Precision Metals | Greenwood | IN | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
Lloyd Industries, INC. | Montgomeryville | PA | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| LILouis Industries INC | Paynesville | MN | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
| LSL & S Metals, Inc. | North Tonawanda | NY | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| LTL & T Precision, LLC | Poway | CA | Primary Metal Manufacturing331315 | — | ◐ LIKELY ACTIVE |
| LMLudlow Manufacturing Inc. | Waukegan | IL | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MMMallory Metal Products INC | Santa Teresa | NM | Fabricated Metal Product Manufacturing332322 | — | ▲ REPORTED CLOSED |
| MRMarine & Restaurant Fabricators, INC. | San Diego | CA | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| MRMason Road Sheet Metal | Houston | TX | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| MPMass Precision INC | Fremont | CA | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| MSMccorvey Sheet Metal Works, L.p. | Houston | TX | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| MAMcgill Airclean LLC | Columbus | OH | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MCMCIMP Contech Engineered Solutions LLC | Topeka | KS | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| MEM & E Mfg. Co., INC. | Kingston | NY | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MCMEMMP Contech Engineered Solutions LLC | Walnut Ridge | AR | Fabricated Metal Product Manufacturing332322 | 1-19 | ◐ LIKELY ACTIVE |
| MBMetal Building Components | Rome | NY | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| MIMetalcraft Industries, INC. | Westminster | CO | Fabricated Metal Product Manufacturing332119 | 20-99 | ◐ LIKELY ACTIVE |
| MNMetalex North | Libertyville | IL | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| MFMetal Fab Crib | Wichita | KS | Fabricated Metal Product Manufacturing332322 | 1-19 | ◐ LIKELY ACTIVE |
| MMMetalfab Material Handling Systems, LLC | Vernon | NJ | Fabricated Metal Product Manufacturing332322 | 1-19 | ◐ LIKELY ACTIVE |
| MMetalfx | Willits | CA | Fabricated Metal Product Manufacturing332322 | 100-499 | ◐ LIKELY ACTIVE |
| MPMetallic Products | Houston | TX | Fabricated Metal Product Manufacturing332311 | 20-99 | ◐ LIKELY ACTIVE |
| MHMetalmax Hermiston | Hermiston | OR | Fabricated Metal Product Manufacturing332114 | 1-19 | ◐ LIKELY ACTIVE |
| MLMetalmax, LLC | Murfreesboro | TN | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MIMetalStorm, Inc. | De Pere | WI | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MIMetfab International, INC. | Waynesboro | VA | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| MIMetko INC. | New Holstein | WI | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MTMiami Tech, INC. | Miami | FL | Fabricated Metal Product Manufacturing332322 | 1-19 | ◐ LIKELY ACTIVE |
| MPMicroform Precision, LLC | Sacramento | CA | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MCMicrometl Corporation | Indianapolis | IN | Fabricated Metal Product Manufacturing332322 | 100-499 | ◐ LIKELY ACTIVE |
Midwest Precision, INC | Tulsa | OK | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MSMission Sheet Metal | Anaheim | CA | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MMMkt Metal Manufacturing | York | PA | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MMM&m Metals | San Antonio | TX | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MPModineer Plant 6 | Niles | MI | Fabricated Metal Product Manufacturing332322 | 100-499 | ◐ LIKELY ACTIVE |