| MMManitou Manufacturing Company | White Bear Lake | MN | — | ◇ UNVERIFIED |
| MNManitou North America LLC | West Bend | WI | — | ◇ UNVERIFIED |
| MLManitowoc Lifts and Manufacturing, LLC | Dekalb | IL | — | ◇ UNVERIFIED |
| MEManiva Engineering | Miami Gardens | FL | — | ◇ UNVERIFIED |
| MFMann's Fabrication & Welding Inc. | Columbus | OH | — | ◇ UNVERIFIED |
| MWManns Welding and Machine LLC | Jerseyville | IL | — | ◇ UNVERIFIED |
| MGManpower Group | Amarillo | TX | — | ◇ UNVERIFIED |
| MAMansell and Associates, LLC | Tuscumbia | AL | — | ◇ UNVERIFIED |
| MMMansfield Metal Solutions LLC | Ontario | CA | — | ◇ UNVERIFIED |
| MWMansfield Welding Services LLC | Oakwood | OH | — | ◇ UNVERIFIED |
| MMMantis Metalcraft LLC | Columbus | OH | — | ◇ UNVERIFIED |
| MIManufab, INC. | Bay Saint Louis | MS | — | ◇ UNVERIFIED |
| MLManufab, LLC | Rexburg | ID | — | ◇ UNVERIFIED |
| MCManufacturing Consulting Services | Sulphur Springs | TX | — | ◇ UNVERIFIED |
| MTManufacturing Techniques INC | Ham Lake | MN | — | ◇ UNVERIFIED |
| MIManzke Investments, Inc. | Escondido | CA | — | ◇ UNVERIFIED |
| MWManz Work, INC. | Orlando | FL | — | ◇ UNVERIFIED |
| MEMape Engineering INC. | Colton | CA | — | ◇ UNVERIFIED |
| MMMaple Mold Technologies | Auburn Hills | MI | — | ◇ UNVERIFIED |
| MPMapleton Properties LLC | Spanish Fork | UT | — | ◇ UNVERIFIED |
| MMMaplewood Machine | North Dartmouth | MA | — | ◇ UNVERIFIED |
| MLMap LLC | Franklin | IN | — | ◇ UNVERIFIED |
| MIMarano Ironworks, INC. | Norristown | PA | — | ◇ UNVERIFIED |
| MEMarathon Equipment Company | Yerington | NV | — | ◇ UNVERIFIED |
| MMMarble Machine, INC. | Danville | IL | — | ◇ UNVERIFIED |
| MMMar-bro Manufacturing, INC. | Phoenix | AZ | — | ◇ UNVERIFIED |
| MHMarc Holt | San Diego | CA | — | ◇ UNVERIFIED |
| MMMarco Machine LLC | Morgantown | WV | — | ◇ UNVERIFIED |
| MMMarco Manufacturing CO. | Akron | OH | — | ◇ UNVERIFIED |
| MMMarcres Manufacturing, INC. Dba Macres Metal Works | Mount Prospect | IL | — | ◇ UNVERIFIED |
| MIMarelco, INC. and Its Successors and Assigns | Beltsville | MD | — | ◇ UNVERIFIED |
| MMMarelich Mechanical Co, INC | Hayward | CA | — | ◇ UNVERIFIED |
| MBMaria Barath Dba Danworth Manufacturing CO | Hayward | CA | — | ◇ UNVERIFIED |
| MMMarietta Magnetics LLC | Marietta | OH | — | ◇ UNVERIFIED |
| MMMari Manufacturing & Engineering, INC. | West Chicago | IL | — | ◇ UNVERIFIED |
| MSMarina Security Gate, INC. | Gardena | CA | — | ◇ UNVERIFIED |
| MEMarine Equipment Supply LLC | Chula Vista | CA | — | ◇ UNVERIFIED |
| MFMarine Fab & Repair, INC | Houma | LA | — | ◇ UNVERIFIED |
| MPMarine Parts House | San Dimas | CA | — | ◇ UNVERIFIED |
| MMMarini Manufacturing, Inc. | Racine | WI | — | ◇ UNVERIFIED |
| MMarino/ware | Pasadena | TX | — | ◇ UNVERIFIED |
| MDMarinus Du Preez Kuyl | Forest Grove | OR | — | ◇ UNVERIFIED |
| MBMark Body Truck & Equipment CO | Imlay City | MI | — | ◇ UNVERIFIED |
| MCMark Carbide Company | Hazel Park | MI | — | ◇ UNVERIFIED |
| MMMarkco Machine Works INC. | Odessa | TX | — | ◇ UNVERIFIED |
| MGMark Godfrey Sr Individual Dba United Iron Works | Orland | CA | — | ◇ UNVERIFIED |
| MSMarking Specialists/Polymer Technologies | Buffalo Grove | IL | — | ◇ UNVERIFIED |
 Markins Enterprise, LLC | Apache Junction | AZ | — | ◇ UNVERIFIED |
| MKMark Knoedler | Ijamsville | MD | — | ◇ UNVERIFIED |
| MMMarkle Manufacturing Company of San Antonio | San Antonio | TX | — | ◇ UNVERIFIED |
| MMMark Manufacturing | Saint Paul | MN | — | ◇ UNVERIFIED |
| MPMark Peiser Manufacturing, Inc. | Tavares | FL | — | ◇ UNVERIFIED |
| MDMarks Design & Metalworks | Vancouver | WA | — | ◇ UNVERIFIED |
| MMMarksman Metal Company INC | Saint Michael | MN | — | ◇ UNVERIFIED |
| MMMarks Metal Technology INC | Clackamas | OR | — | ◇ UNVERIFIED |
| MSMark Steel CORP | Salt Lake City | UT | — | ◇ UNVERIFIED |
| MWMarks Welding & Fabricating | Thorsby | AL | — | ◇ UNVERIFIED |
| MFMarlatt Fabricators INC. | Sandia | TX | — | ◇ UNVERIFIED |
| MMMarlee MFG, Inc | Rochester | NY | — | ◇ UNVERIFIED |
| MPMarlton Pike Precision | Cherry Hill | NJ | — | ◇ UNVERIFIED |
| MIMaro International Corporation | Tulsa | OK | — | ◇ UNVERIFIED |
| MMMaro Manufacturing, INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| MMMarquardt & Mueller Machining, INC | Woodstock | IL | — | ◇ UNVERIFIED |
| MLMarrick, LLC | Chesapeake | VA | — | ◇ UNVERIFIED |
| MLMarrick LLC | Norfolk | VA | — | ◇ UNVERIFIED |
| MWMarriott Walker Corporation | Birmingham | MI | — | ◇ UNVERIFIED |
| MMMarshall Manufacturing Company | Minneapolis | MN | — | ◇ UNVERIFIED |
| MRMarshall Ruby INC | Frostburg | MD | — | ◇ UNVERIFIED |
| MSMarshall Stamping Company | Valencia | PA | — | ◇ UNVERIFIED |
| MMMarshal Machinery INC | San Clemente | CA | — | ◇ UNVERIFIED |
| MIMarstan INC | Coon Rapids | MN | — | ◇ UNVERIFIED |
| MIMarstrand Industries, INC. | Pittsburgh | PA | — | ◇ UNVERIFIED |
| MPMar-tech Precision, LLC | Hackettstown | NJ | — | ◇ UNVERIFIED |
| MDMartell Design and Fabrication LLC | Saco | ME | — | ◇ UNVERIFIED |
| MMMartelli's Metal Fabrication INC | Ivyland | PA | — | ◇ UNVERIFIED |
| MSMartha S Materials INC | Lexington | KY | — | ◇ UNVERIFIED |
| MIMarti, Inc. | Bemidji | MN | — | ◇ UNVERIFIED |
| MSMartinez Steel | San Francisco | CA | — | ◇ UNVERIFIED |
| MIMartin Iron Works, INC | Reno | NV | — | ◇ UNVERIFIED |
| MIMartin Iron Works, INC. | Reno | NV | — | ◇ UNVERIFIED |
| MMMartin Machine Works, INC. | Decaturville | TN | — | ◇ UNVERIFIED |
| MMMartin Manufactuirng, INC. | Sapulpa | OK | — | ◇ UNVERIFIED |
| MMMartin Metal Fabricators INC | Salem | OR | — | ◇ UNVERIFIED |
| MMMartin Metalwork LLC | Berea | KY | — | ◇ UNVERIFIED |
| MHMartin-Pittman Holdings, Inc. | Indianapolis | IN | — | ◇ UNVERIFIED |
| MSMartin Sheet Metal, INC. | Amarillo | TX | — | ◇ UNVERIFIED |
| MSMartin Steel Constructors | Eleele | HI | — | ◇ UNVERIFIED |
| MWMartin Welding and Fabrication LLC | Contoocook | NH | — | ◇ UNVERIFIED |
| MHMarvel Holdings LLC | Orchard | TX | — | ◇ UNVERIFIED |
| MMMarvel Machining Enterprises LLC | Bensenville | IL | — | ◇ UNVERIFIED |
| MTMar-vel Tool CO. | Dayton | OH | — | ◇ UNVERIFIED |
| MDMarx Digital Mfg, Inc | Las Vegas | NV | — | ◇ UNVERIFIED |
| MMMaryland Metals Processing, INC. | Sparrows Point | MD | — | ◇ UNVERIFIED |
| MSMaryland Structural Fabricators INC | Millington | MD | — | ◇ UNVERIFIED |
| MLMascoat LLC | West Monroe | LA | — | ◇ UNVERIFIED |
| MHMascotte Home Security Products INC | Portland | OR | — | ◇ UNVERIFIED |
| MCMason Corporation | Jemison | AL | — | ◇ UNVERIFIED |
| MHMason Header Die | Mason | MI | — | ◇ UNVERIFIED |
| MMMason Machine and Fab, LLC | Lafayette | LA | — | ◇ UNVERIFIED |
| MMMason Machinings INC | Morristown | TN | — | ◇ UNVERIFIED |
