| MAMechanical and Industrial Steel Services, INC. | Channahon | IL | — | ◇ UNVERIFIED |
| MHMedway Hall Development Group, Inc. | Jacksonville | FL | — | ◇ UNVERIFIED |
| MMMeiers Modern Metals, LLC | Portland | OR | — | ◇ UNVERIFIED |
| MPMellies Products INC. | Morganville | KS | — | ◇ UNVERIFIED |
| MPMelting Point Welding & Fabrication, Inc. | Killingly | CT | — | ◇ UNVERIFIED |
| MBMelvin Baltodano | Ontario | CA | — | ◇ UNVERIFIED |
| MWMelvin Wrought Iron & Ornamental | Ontario | CA | — | ◇ UNVERIFIED |
| MSMemphis Sheet Metal Works INC | Memphis | TN | — | ◇ UNVERIFIED |
| MMMenard Manufacturing INC. | Dewitt | AR | — | ◇ UNVERIFIED |
| MMMenator Metal Works LLC | Winneconne | WI | — | ◇ UNVERIFIED |
| MSMendel Steel & Ornamental Iron Company | Bethel Park | PA | — | ◇ UNVERIFIED |
| MOMendoza's Ornamental Iron | Fullerton | CA | — | ◇ UNVERIFIED |
| MMMerchants Metals, LLC | Jacksonville | FL | — | ◇ UNVERIFIED |
| MMMerchant's Moving & Storage Corporation | Yoakum | TX | — | ◇ UNVERIFIED |
| MCMere Capital, LLC dba Czar Weld | House Springs | MO | — | ◇ UNVERIFIED |
| MSMeridian Specialty Vehicles | Las Vegas | NV | — | ◇ UNVERIFIED |
| MEMerrill Engineering & Integration | Saginaw | MI | — | ◇ UNVERIFIED |
| MFMerrill Fab | Merrill | WI | — | ◇ UNVERIFIED |
| MIMerrill Iron & Steel South | Springfield | MO | — | ◇ UNVERIFIED |
| MSMerrill Steel Camanche | Camanche | IA | — | ◇ UNVERIFIED |
| MCMerrimack County Customs, LLC. | Bradford | NH | — | ◇ UNVERIFIED |
| MVMesilla Valley Metals | Las Cruces | NM | — | ◇ UNVERIFIED |
| MMMesser Machine - Mfg INC | Windom | MN | — | ◇ UNVERIFIED |
| MDMeta Designs, LLC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| MAMetal Air Ironworks, INC. | Chico | CA | — | ◇ UNVERIFIED |
| MAMetal Alliance Inc | Huntingdon Valley | PA | — | ◇ UNVERIFIED |
| MAMetal Arts Engravers INC | Shawnee | KS | — | ◇ UNVERIFIED |
| MBMetal Bending Corporation | Orange | CA | — | ◇ UNVERIFIED |
| MLMetalbuilt LLC | Macomb | MI | — | ◇ UNVERIFIED |
| MCMetal Concepts Az LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| MCMetal Concepts LLC | Cypress | TX | — | ◇ UNVERIFIED |
| MIMetal-con, INC. | Sylvania | GA | — | ◇ UNVERIFIED |
| MCMetal Container Corporation | Oklahoma City | OK | — | ◇ UNVERIFIED |
| MLMetalCraft LLC | Bantam | CT | — | ◇ UNVERIFIED |
| MDMetal Design Corporation | Madison | WI | — | ◇ UNVERIFIED |
| MEMetal Enterprises, INC. | Portland | OR | — | ◇ UNVERIFIED |
| MAMetalfab Arizona L.l.c. | Phoenix | AZ | — | ◇ UNVERIFIED |
| MIMetalfab INC | Kennewick | WA | — | ◇ UNVERIFIED |
| MIMetalfab INC | Richland | WA | — | ◇ UNVERIFIED |
| MIMetalfab, INC. | San Antonio | FL | — | ◇ UNVERIFIED |
| MFMetal Fabrication Technologies D/b/a Gerdau Ameris | Johnson City | TN | — | ◇ UNVERIFIED |
| MFMetal Fabricators, LLC | Tallahassee | FL | — | ◇ UNVERIFIED |
| MFMetal Fabricators of St Louis | Saint Louis | MO | — | ◇ UNVERIFIED |
| MFMetal for Electronics LLC | Memphis | TN | — | ◇ UNVERIFIED |
| MIMetal Impressions INC | Sanford | NC | — | ◇ UNVERIFIED |
| MIMetal Innovations, Inc. | Chatsworth | CA | — | ◇ UNVERIFIED |
| MKMetal Kings | Lynwood | CA | — | ◇ UNVERIFIED |
 Metal Machining Co., INC | Dorado | PR | — | ◇ UNVERIFIED |
| MMMetal Magic | Waynesboro | VA | — | ◇ UNVERIFIED |
| MMMetal Magic, LLC | Ocala | FL | — | ◇ UNVERIFIED |
