| MAMichael a Thomas and Renae Thomas, Individually and As Husband and Wife | Apache Junction | AZ | — | ◇ UNVERIFIED |
| MMMichael Mccann | Grants Pass | OR | — | ◇ UNVERIFIED |
| MTMichael Todd Mcmurray | Portland | OR | — | ◇ UNVERIFIED |
| MRMicrosoft Redmond 17760 Facility | Redmond | WA | — | ◇ UNVERIFIED |
| MMMidlander Manufacturing Inc | Howell | MI | — | ◇ UNVERIFIED |
| MPMidland Precision Machining, INC | Chandler | AZ | — | ◇ UNVERIFIED |
| MAMidwest Air Technologies, INC. | Mesquite | TX | — | ◇ UNVERIFIED |
| MIMileon Investments LLC | Chatsworth | CA | — | ◇ UNVERIFIED |
| MMMillerbernd Manufacturing Company | Winsted | MN | — | ◇ UNVERIFIED |
| MCMiller's Custom Metals, INC. | Lake Worth | FL | — | ◇ UNVERIFIED |
 Minestone Construction | Hillsborough | NJ | — | ◇ UNVERIFIED |
| MBMiranda Bros Iron Works LLC | Oxnard | CA | — | ◇ UNVERIFIED |
| MIMission Iron Works | Pacoima | CA | — | ◇ UNVERIFIED |
| MVMission Viejo Ornamental Iron,r Honarvar | Rancho Sta Margarita | CA | — | ◇ UNVERIFIED |
| MOMissouri Ornamental Iron Company, INC. | University City | MO | — | ◇ UNVERIFIED |
| MMM & M Contractors | Aberdeen | WA | — | ◇ UNVERIFIED |
| MCModern Crane Technologies | Montrose | MI | — | ◇ UNVERIFIED |
 Modern Metal Solutions LLC | Hudson | NH | — | ◇ UNVERIFIED |
| MCMomomi CO LTD Dba Tru-form Metals | Livermore | CA | — | ◇ UNVERIFIED |
| MHMonarch Hardware Manufacturing | Shepherdsville | KY | — | ◇ UNVERIFIED |
| MMMonster Mud Pits INC. | Fort Stockton | TX | — | ◇ UNVERIFIED |
| MMMonster Mud Pits INC. | Mentone | TX | — | ◇ UNVERIFIED |
| MEMorgan Engineering Systems INC. | Alliance | OH | — | ◇ UNVERIFIED |
| MOMorgan's Outdoor Living INC. | Concord | CA | — | ◇ UNVERIFIED |
| MMMorris Material Handling INC | Oak Creek | WI | — | ◇ UNVERIFIED |
| MMMorris Material Handling - Kone Cranes | Franklin | OH | — | ◇ UNVERIFIED |
| MMMorris Material Handling - Watertown | Watertown | WI | — | ◇ UNVERIFIED |
| MDMoz Designs INC | Livermore | CA | — | ◇ UNVERIFIED |
| MOMq Ornamental | Chula Vista | CA | — | ◇ UNVERIFIED |
| MCMt Clemens Crane & Service CO INC | Harrison Twp | MI | — | ◇ UNVERIFIED |
| MOMueller Ornamental Iron Works, INC. | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| MMMulti Metals Company, INC. | Greensburg | PA | — | ◇ UNVERIFIED |
| MMMunns Manufacturing INC. | Tremonton | UT | — | ◇ UNVERIFIED |
| MIMurray's Iron Works INC | Commerce | CA | — | ◇ UNVERIFIED |
| MMMusic's Metal Works, LLC. | Dayton | OH | — | ◇ UNVERIFIED |
| MM+v | El Paso | TX | — | ◇ UNVERIFIED |
| MIMwi INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| MFMyers Fabrication INC | Eugene | OR | — | ◇ UNVERIFIED |
| NDNarragansett Dock Works INC. | Narragansett | RI | — | ◇ UNVERIFIED |
| NCNational Crane CORP | Waverly | NE | — | ◇ UNVERIFIED |
| NHNebraska Hoist and Crane | Omaha | NE | — | ◇ UNVERIFIED |
| NINext Innovations LTD | Walker | MN | — | ◇ UNVERIFIED |
| NINicks Iron Works, INC | Brooklyn | NY | — | ◇ UNVERIFIED |
| NMNick's Metal Fabricating & Sons, Inc. | Seneca | IL | — | ◇ UNVERIFIED |
| NBNor Bay Ironcraft | Petaluma | CA | — | ◇ UNVERIFIED |
| NSNorfolk Southern Corporation | Roanoke | VA | — | ◇ UNVERIFIED |
| NCNortheast Construction Industries, INC. | Montgomery | NY | — | ◇ UNVERIFIED |
| NFNortheast Fence & Iron Works, INC. | Philadelphia | PA | — | ◇ UNVERIFIED |
| NCNorthern Containment LLC | Brainerd | MN | — | ◇ UNVERIFIED |
| NPNorth Pacific Industrial Coatings Kent | Kent | WA | — | ◇ UNVERIFIED |
