| LSLenex Steel | Indianapolis | IN | — | ◇ UNVERIFIED |
| LALennox Aes-tallassee | Tallassee | AL | — | ◇ UNVERIFIED |
| LTLetourneau Technologies, INC | Vicksburg | MS | — | ◇ UNVERIFIED |
| LILfm Industries | Houston | TX | — | ◇ UNVERIFIED |
| LBLiberty Brass Turning CO Former | Long Island City | NY | — | ◇ UNVERIFIED |
| LMLiddy's Machine Shop, INC | Jacksonville | FL | — | ◇ UNVERIFIED |
| LBLiebovich Brothers INC | Rockford | IL | — | ◇ UNVERIFIED |
| LTLife Time Construction - Millwork 2 | Chaska | MN | — | ◇ UNVERIFIED |
| LDLifetime Doors, INC. | Los Banos | CA | — | ◇ UNVERIFIED |
| LLightolier | Wilmington | MA | — | ◇ UNVERIFIED |
| LILinamar Indiana Plant 1 | Albion | IN | — | ◇ UNVERIFIED |
| LSLincoln Steel Corporation | Lincoln | NE | — | ◇ UNVERIFIED |
| LBLinesville Bus Park | Linesville | PA | — | ◇ UNVERIFIED |
 Linita Design & Mfg CORP | Lackawanna | NY | — | ◇ UNVERIFIED |
 Lippert Components, INC | Goshen | IN | — | ◇ UNVERIFIED |
| Lippert Components INC. 83 | Elkhart | IN | — | ◇ UNVERIFIED |
| Lippert Components Manufacturing, INC. | White Pigeon | MI | — | ◇ UNVERIFIED |
| Lippert Components Plant 084 | Nampa | ID | — | ◇ UNVERIFIED |
| Lippert Components Plant 151 | Kendallville | IN | — | ◇ UNVERIFIED |
| LRLittle River Millwork INC | Ashdown | AR | — | ◇ UNVERIFIED |
| LWLittle Washington Fabrications, INC. | Christiana | PA | — | ◇ UNVERIFIED |
| LALmi Aerospace | Fredonia | KS | — | ◇ UNVERIFIED |
| LMLmi Manufacturing Holdings LLC | Allenton | WI | — | ◇ UNVERIFIED |
| LIL&n Industries INC | Rushville | IL | — | ◇ UNVERIFIED |
| LKLoad King Mfg | Jacksonville | FL | — | ◇ UNVERIFIED |
| LELobdell Emery Mfg CO | Alma | MI | — | ◇ UNVERIFIED |
| LMLockheed Martin | Akron | OH | — | ◇ UNVERIFIED |
| LMLoftness Manufacturing | Hector | MN | — | ◇ UNVERIFIED |
| LILong Industries Buffalo Facility | Buffalo | TX | — | ◇ UNVERIFIED |
| LILong Industries Carlsbad Facility | Carlsbad | TX | — | ◇ UNVERIFIED |
| LCLorac CO | Providence | RI | — | ◇ UNVERIFIED |
| LALoral Aeronutronic | Newport Beach | CA | — | ◇ UNVERIFIED |
| LCLoren Cook Co-barnes St Plant | Springfield | MO | — | ◇ UNVERIFIED |
| LPLoren Products | Lawrence | MA | — | ◇ UNVERIFIED |
| LTLoud Technologies | Whitinsville | MA | — | ◇ UNVERIFIED |
| LMLoughberry Manufacturing Corporation | Saratoga Springs | NY | — | ◇ UNVERIFIED |
| LLtc | Lebanon | PA | — | ◇ UNVERIFIED |
| LLLubrizol Life Sciences INC | Franklin | WI | — | ◇ UNVERIFIED |
| LILuffland Industries | Bates City | MO | — | ◇ UNVERIFIED |
| LTLufthansa Technik Engine Services | Tulsa | OK | — | ◇ UNVERIFIED |
| LILumbermens INC | Byron Center | MI | — | ◇ UNVERIFIED |
| LALynns Auto Body/oreland | Oreland | PA | — | ◇ UNVERIFIED |
| MGMacdermid Graphic Arts | Adams, Town of | MA | — | ◇ UNVERIFIED |
| MMMachined Metals Mfg INC | Collegeville | PA | — | ◇ UNVERIFIED |
| MPMachine Precision Components | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| MTMachine Tool Factory INC | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| MHMack Hils, INC. | Moberly | MO | — | ◇ UNVERIFIED |
| MIMadison INC / 8500 New Sapulpa Rd | Tulsa | OK | — | ◇ UNVERIFIED |
| MIMadison Industries | Los Angeles | CA | — | ◇ UNVERIFIED |
| MPMadison Pre-hung Doors & Pre-finishing | Oregon | WI | — | ◇ UNVERIFIED |
| MPMagga Products Company INC | Holly Hill | FL | — | ◇ UNVERIFIED |
| MMMagnuson Metals Utah, LLC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| MMMajestic Machine & Engineering, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| MUMalach USA | Valley City | ND | — | ◇ UNVERIFIED |
| MMMa Metal | Edinburgh | IN | — | ◇ UNVERIFIED |
| MTManchester Tank and Equipment | Petersburg | VA | — | ◇ UNVERIFIED |
| MTManchester Tank & Equipment CO | Elkhart | IN | — | ◇ UNVERIFIED |
| MTManchester Tank & Equipment CO | Bedford | IN | — | ◇ UNVERIFIED |
| MSManitex Sabre INC | Knox | IN | — | ◇ UNVERIFIED |
| MMMannington Mills, INC. - Mannington Wood Floors Company | High Point | NC | — | ◇ UNVERIFIED |
| MTMapp Technologies, L.l.c. | Joplin | MO | — | ◇ UNVERIFIED |
| MPMarch Performance INC | Naples | FL | — | ◇ UNVERIFIED |
| MWMarc Woodworking INC | Indianapolis | IN | — | ◇ UNVERIFIED |
| MAMarine Accessories Corporation (mac) | Maryville | TN | — | ◇ UNVERIFIED |
| MPMarion Process Solutions | Marion | IA | — | ◇ UNVERIFIED |
| MSMarion Steel Fabrication Incorporated | Marion | IN | — | ◇ UNVERIFIED |
| MIMaritime International INC | Broussard | LA | — | ◇ UNVERIFIED |
| MVMark Vii Equipment Incorporated | Arvada | CO | — | ◇ UNVERIFIED |
| MCMarley Cooling Tower Company | Louisville | KY | — | ◇ UNVERIFIED |
| MCMarox CORP | Holyoke | MA | — | ◇ UNVERIFIED |
| MTMarquette Tool & Die | Saint Louis | MO | — | ◇ UNVERIFIED |
| MSMarshall Steel Services INC. | Arvada | CO | — | ◇ UNVERIFIED |
| MCMartin Conveyor Division | Mansfield | TX | — | ◇ UNVERIFIED |
| MSMartin Steel INC | Huntington | WV | — | ◇ UNVERIFIED |
| MIMarx Industries INC | Sawmills | NC | — | ◇ UNVERIFIED |
| MFMason Forest Products INC | Hattiesburg | MS | — | ◇ UNVERIFIED |
| MDMasonite Door Fabrication Services | Yulee | FL | — | ◇ UNVERIFIED |
| MPMaster Printing INC | Carlstadt | NJ | — | ◇ UNVERIFIED |
| MTMatco Tools | Lakewood | NY | — | ◇ UNVERIFIED |
| MTMaterials Technology INC | Somerset | NJ | — | ◇ UNVERIFIED |
| MBMaterion Brush INC | Fremont | CA | — | ◇ UNVERIFIED |
| MMMathy Machine INC | Santee | CA | — | ◇ UNVERIFIED |
 Matrix Machine and Repair INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
 Matthews International Corporation | Kingwood | WV | — | ◇ UNVERIFIED |
| MCMauell Corporation-utility Room | Dillsburg | PA | — | ◇ UNVERIFIED |
| MTMaxcess Technologies-closed | Summerville | SC | — | ◇ UNVERIFIED |
| MMMaxcor Manufacturing INC | Colorado Springs | CO | — | ◇ UNVERIFIED |
| MHMayflower Hardwoods Flooring | Lynchburg | VA | — | ◇ UNVERIFIED |
| MFMaynard Frame Shop INC | Star | NC | — | ◇ UNVERIFIED |
| MVMay-wilbert Vault-pt Huron | Port Huron | MI | — | ◇ UNVERIFIED |
| MWMazzella Welding & Fabrication INC | Wellsburg | WV | — | ◇ UNVERIFIED |
 M-b Companies INC | Chilton | WI | — | ◇ UNVERIFIED |
| MWMbc Woodshop INC | Morgantown | WV | — | ◇ UNVERIFIED |
| MAMcabee Assembly Facility | Tuscaloosa | AL | — | ◇ UNVERIFIED |
| MLMcbride Lumber Company | Star | NC | — | ◇ UNVERIFIED |
| MSMcb Steel, INC. | Bessemer | AL | — | ◇ UNVERIFIED |
| MIMccullough Industries | Kenton | OH | — | ◇ UNVERIFIED |
| MIMcdermott INC | Gibson | LA | — | ◇ UNVERIFIED |
| MIMcdermott INC - Morgan City Fabrication Facility - Amelia Yard | Amelia | LA | — | ◇ UNVERIFIED |
| MMMcdonald Mfg INC | Artesia | CA | — | ◇ UNVERIFIED |
