Lockheed Martin Corporation | Pinellas Park | FL | — | ● ACTIVE |
Lockheed Martin Corporation | Ventura | CA | — | ● ACTIVE |
Lodi Iron Works, INC. | Lodi | CA | — | ● ACTIVE |
| LMLomont Molding Incorporated | Mount Pleasant | IA | 100–499 | ● ACTIVE |
Longhorn Ammunition, LLC | Florence | TX | — | ● ACTIVE |
Long Machine, INC | Temecula | CA | — | ● ACTIVE |
Loree Air, INC. | Diamond Springs | CA | — | ● ACTIVE |
Louis Hoffmann CO. | Menomonee Falls | WI | — | ● ACTIVE |
Louisiana Energy Services, LLC | Eunice | NM | 100–499 | ● ACTIVE |
| LILucas-milhaupt, INC. | Cudahy | WI | 100–499 | ● ACTIVE |
Luxfer Magtech INC | Saxonburg | PA | — | ● ACTIVE |
Lyall Turbosonics, INC. | Lake Forest | CA | — | ● ACTIVE |
Lymtal International INC | Lake Orion | MI | — | ● ACTIVE |
Lynco Grinding Company INC | Bell Gardens | CA | — | ● ACTIVE |
Machine Service, INC. | Green Bay | WI | 100–499 | ● ACTIVE |
| MSMachine Specialties, LLC | Whitsett | NC | — | ● ACTIVE |
Machinetek, LLC | Carlsbad | CA | — | ● ACTIVE |
Machineworks Manufacturing | Northridge | CA | — | ● ACTIVE |
Machining Technologies, INC | Salisbury | MD | — | ● ACTIVE |
| MIMadix, INC. | Terrell | TX | 500+ | ● ACTIVE |
| MIMadix, INC. - Goodwater | Goodwater | AL | 100–499 | ● ACTIVE |
Magee Technologies LLC | California | MD | 20–99 | ● ACTIVE |
Magellan Aerospace, Middletown, INC | Middletown | OH | 100–499 | ● ACTIVE |
Magid Glove and Safety Manufacturing Company, L.l.c. | Romeoville | IL | 500+ | ● ACTIVE |
| MCMagna-matic CORP | Waldo | WI | — | ● ACTIVE |
Magna Tool INC. | Cypress | CA | — | ● ACTIVE |
| MSMagnetic Seal LLC | Warren | RI | 20–99 | ● ACTIVE |
Mahle Industrial Thermal Systems America LP | Belmont | MI | — | ● ACTIVE |
Main Manufacturing Products INC | Grand Blanc | MI | — | ● ACTIVE |
Majr Products CORP | Saegertown | PA | — | ● ACTIVE |
Mallory Industries, Incorporated | Farmington | CT | — | ● ACTIVE |
Maloy Mobile Storage, INC | Albuquerque | NM | — | ● ACTIVE |
Maney Aircraft, INC. | Ontario | CA | — | ● ACTIVE |
Mannon Metal Works LLC | Lebanon | MO | — | ● ACTIVE |
Mantec Services INC | Saint Charles | IL | — | ● ACTIVE |
| MDManufacturing Development INC | Cheney | KS | — | ● ACTIVE |
| MSManufacturing Solutions, INC | Newton | KS | 20–99 | ● ACTIVE |
Manufacturing Solutions, INC | Morrisville | VT | 100–499 | ● ACTIVE |
Manufacturing Technology, INC | South Bend | IN | — | ● ACTIVE |
Manville Rubber Products INC | Manville | NJ | — | ● ACTIVE |
| MAMarathonnorco Aerospace, INC. | Waco | TX | 20–99 | ● ACTIVE |
Marian Fort Worth, INC. | Fort Worth | TX | 20–99 | ● ACTIVE |
Marine & Industrial Supply Company, INC. | Mobile | AL | 20–99 | ● ACTIVE |
Marine Rigging INC | Mobile | AL | — | ● ACTIVE |
| MBMarks Brothers INC | Boring | OR | — | ● ACTIVE |
Marlboro Wire, Limited | Quincy | IL | 20–99 | ● ACTIVE |
Marlon INC | Boise | ID | — | ● ACTIVE |
Marotta Controls INC | Montville | NJ | — | ● ACTIVE |
Martin-baker America INC | Johnstown | PA | — | ● ACTIVE |
Marvin Engineering Co, INC | Inglewood | CA | — | ● ACTIVE |
Marvin Test Solutions, INC. | Irvine | CA | — | ● ACTIVE |
Maryland Screen Printers, INC. | Baltimore | MD | — | ● ACTIVE |
Mas Components & Coatings, LLC | Selmer | TN | — | ● ACTIVE |
Master Metal Products Company | San Jose | CA | — | ● ACTIVE |
| MAMaterion Advanced Chemicals INC | Milwaukee | WI | — | ● ACTIVE |
| MNMaterion Newton INC | Newton | MA | 100–499 | ● ACTIVE |
Matrix Plastic Products INC | Wood Dale | IL | 100–499 | ● ACTIVE |
Maverick Aerospace LLC | City of Industry | CA | — | ● ACTIVE |
Mavrix, INC. | New Berlin | WI | — | ● ACTIVE |
Max Aerostructures, LLC | Wichita | KS | — | ● ACTIVE |
Maxsteel Fabrication, LLC | Paris | TN | 20–99 | ● ACTIVE |
Maynard INC | Fayetteville | AR | — | ● ACTIVE |
May Tool and Mold Co., INC. | Kansas City | MO | — | ● ACTIVE |
Mcclarin Plastics, LLC | Hanover | PA | — | ● ACTIVE |
Mckenzie Machining INC | San Jose | CA | — | ● ACTIVE |
| MBMcmellon Bros., Incorporated | Stratford | CT | 20–99 | ● ACTIVE |
Mcneil Industries INC | Painesville | OH | 20–99 | ● ACTIVE |
Mct INC | Albuquerque | NM | — | ● ACTIVE |
Mct Industries, INC. | Bernalillo | NM | — | ● ACTIVE |
| MPMdc Precision LLC | Hayward | CA | — | ● ACTIVE |
Mears Machine CORP | Avon | IN | — | ● ACTIVE |
Mechanical Metal Finishing CO | Gardena | CA | — | ● ACTIVE |
| MVMedtronic Vascular | Santa Rosa | CA | 100–499 | ● ACTIVE |
| MDMeggitt Defense Systems, INC. | Irvine | CA | 100–499 | ● ACTIVE |
Mekra Lang North America, LLC | Ridgeway | SC | 100–499 | ● ACTIVE |
Melco Steel INC | Azusa | CA | — | ● ACTIVE |
Melrose Metal Finishing, INC | Oakland | CA | — | ● ACTIVE |
Melton Machine & Control CO | Washington | MO | 100–499 | ● ACTIVE |
Mercer Spring & Wire LLC | Townville | PA | — | ● ACTIVE |
Merit3d, LLC | Price | UT | — | ● ACTIVE |
Merlin Mold & Manufacturing INC | Canastota | NY | — | ● ACTIVE |
Metal Chem, INC. | Chatsworth | CA | — | ● ACTIVE |
Metalcraft, INC | Baltimore | MD | 20–99 | ● ACTIVE |
| MFMetal Fab South INC | Kenner | LA | — | ● ACTIVE |
Metal Finishing Specialty, LLC | Albuquerque | NM | — | ● ACTIVE |
Metalform Industries, INC. | Wichita | KS | — | ● ACTIVE |
Metal Forming & Coining LLC | Maumee | OH | — | ● ACTIVE |
Metal Improvement Company, LLC | Addison | IL | — | ● ACTIVE |
| MIMetal Improvement Company, LLC | Milwaukee | WI | 20–99 | ● ACTIVE |
| MIMetal Improvement Company, LLC | Santa Ana | CA | — | ● ACTIVE |
Metal Improvement Company, LLC | Saint Paul | MN | — | ● ACTIVE |
Metal Improvement Company, LLC | Twinsburg | OH | — | ● ACTIVE |
| MIMetal Improvement Company, LLC | Lynwood | CA | — | ● ACTIVE |
Metal Improvement Company, LLC | Grand Prairie | TX | — | ● ACTIVE |
Metallion Industries, INC. | Estacada | OR | — | ● ACTIVE |
Metallizing Service Company Holdings, LLC | West Hartford | CT | — | ● ACTIVE |
Metallus INC. | Canton | OH | 500+ | ● ACTIVE |
Metalor Technologies USA Corporation | North Attleboro | MA | — | ● ACTIVE |
Metal Solutions Design & Fabrication LLC | Dayton | KY | — | ● ACTIVE |
| MSMetal Surfaces International, LLC | Bell Gardens | CA | 100–499 | ● ACTIVE |