 Masters Machine, LLC | Richmond | MI | — | ◇ UNVERIFIED |
| Masters Machine Shop INC | Mankato | MN | — | ◇ UNVERIFIED |
| MPMasters Precision Machining Inc. | Kent | OH | — | ◇ UNVERIFIED |
| MSMaster Swaging, INC. | Jackson Center | OH | — | ◇ UNVERIFIED |
| MHMatic Hydraulics, INC. | College Point | NY | — | ◇ UNVERIFIED |
 Matrix Machine & Manufacturing LLC | Broomfield | CO | — | ◇ UNVERIFIED |
| MMMatrix Machining Inc. | Neenah | WI | — | ◇ UNVERIFIED |
| MTMatrix Tooling & Design INC | Ramsey | MN | — | ◇ UNVERIFIED |
| MAMatsu Alabama, INC | Huntsville | AL | — | ◇ UNVERIFIED |
| MMMatt Machine & Manufacturing, INC. | Pittsburgh | PA | — | ◇ UNVERIFIED |
| MMMaupins Machine Shop | Dodge City | KS | — | ◇ UNVERIFIED |
| MRMaverick Realty LLC | Norman | OK | — | ◇ UNVERIFIED |
| MCMaxcam Corporation | White Bear Lake | MN | — | ◇ UNVERIFIED |
| MMMaxim Motor Sports | Lake Havasu City | AZ | — | ◇ UNVERIFIED |
| MPMaximus Precison | North Springfield | VT | — | ◇ UNVERIFIED |
| MPMaximus Precison | Springfield | VT | — | ◇ UNVERIFIED |
| MAMayaguez Auto Part | Mayaguez | PR | — | ◇ UNVERIFIED |
| MJMaya Jig Grinding & Gage Co. | Plymouth | MI | — | ◇ UNVERIFIED |
| MPMayer Pollock Steel CORP | Pottstown | PA | — | ◇ UNVERIFIED |
| MMMayfield Machine & Tool CO | Mayfield | KY | — | ◇ UNVERIFIED |
| MFMay Foundry & Machine CO | Slc | UT | — | ◇ UNVERIFIED |
| MLMaynard Lake Machining LLC | Dassel | MN | — | ◇ UNVERIFIED |
| MMMayor's Machine Works, INC. | Sugar Land | TX | — | ◇ UNVERIFIED |
| MGMbi Global, LLC | Lafayette | LA | — | ◇ UNVERIFIED |
| MCMbta Charlestown Non-revenue Automotive Garage | Charlestown | MA | — | ◇ UNVERIFIED |
| MMMcadoo Machine Company | Kelayres | PA | — | ◇ UNVERIFIED |
| MMMcallen Motor Mart Machine Shop | Mcallen | TX | — | ◇ UNVERIFIED |
| MPMcarthur Park, INC. Dba the Bleacherman | Corinth | NY | — | ◇ UNVERIFIED |
| MRMcbride's Research & Machine, INC. | Sparks | NV | — | ◇ UNVERIFIED |
| MDMC Developers, LLC | Brodhead | WI | — | ◇ UNVERIFIED |
| MHMC&D Holdings, LLC | Addison | IL | — | ◇ UNVERIFIED |
| MPMcElheny Precision Machining | Pavilion | NY | — | ◇ UNVERIFIED |
| MTMcferron Tool and Machine Company | Harrisonville | MO | — | ◇ UNVERIFIED |
| MMMcgill Maintenance Partnership, Lt | Freeport | TX | — | ◇ UNVERIFIED |
| MMMcgregor Manufacturing Company | Ozark | MO | — | ◇ UNVERIFIED |
| MIMcguire INC. | Gnadenhutten | OH | — | ◇ UNVERIFIED |
| MMMckenney Machine & Tool Company | Corinna | ME | — | ◇ UNVERIFIED |
| MIMcmanus Instrument Co., INC. | Village Mills | TX | — | ◇ UNVERIFIED |
| MMMcmillan Machine Co., INC. | Phoenix | AZ | — | ◇ UNVERIFIED |
| MMMcmillan Mechanical & Machine Co., INC. | Shreveport | LA | — | ◇ UNVERIFIED |
| MMMcr Manufactured Component Resource LLC | Isanti | MN | — | ◇ UNVERIFIED |
| MMcwane | Tyler | TX | — | ◇ UNVERIFIED |
| MCMcwane Cast Iron Pipe CO. | Birmingham | AL | — | ◇ UNVERIFIED |
| MCMcwane Cast Iron Pipe CO. | Birmingham | AL | — | ◇ UNVERIFIED |
| MIMcwane, INC. | Oakland | CA | — | ◇ UNVERIFIED |
| MIMdf Ind. INC. | Salina | KS | — | ◇ UNVERIFIED |
| MDM & D Machine Company | Linthicum | MD | — | ◇ UNVERIFIED |
| MDM - D Machining | Truman | MN | — | ◇ UNVERIFIED |
| MMMeadow Manufacturing, Inc. | Berlin | CT | — | ◇ UNVERIFIED |
| MDMechanical Designs of Virginia | Stuart | VA | — | ◇ UNVERIFIED |
| MRMechanical Repair & Engineering, L.p. | La Porte | TX | — | ◇ UNVERIFIED |
| MCMechanovent Corporation Dba the New York Blower Company | Effingham | IL | — | ◇ UNVERIFIED |
| MMMechura Machine Works, LLC | Victoria | TX | — | ◇ UNVERIFIED |
| MIMecpro INC | Santa Clara | CA | — | ◇ UNVERIFIED |
| MMMedley Machine Shop INC. | Medley | FL | — | ◇ UNVERIFIED |
| MIMedplast INC. | West Berlin | NJ | — | ◇ UNVERIFIED |
| MTMedway Tool Machining, LLC | Troy | OH | — | ◇ UNVERIFIED |
| MTMega Tool & Mfg CORP | Elmira | NY | — | ◇ UNVERIFIED |
| MLMelAnna LLC | Cambridge | MN | — | ◇ UNVERIFIED |
| MMMelissa M Riley | Portland | OR | — | ◇ UNVERIFIED |
| MAMeltec a Div of Young CORP | Seattle | WA | — | ◇ UNVERIFIED |
| MLMenco, LLC | Wausaukee | WI | — | ◇ UNVERIFIED |
| MTMendeola Transaxles INC | San Diego | CA | — | ◇ UNVERIFIED |
| MFMercer Forge Corporation | Wheatland | PA | — | ◇ UNVERIFIED |
| MMMercer Machine and Tool LLC | Hamilton | NJ | — | ◇ UNVERIFIED |
| MMMerchant Mfg INC | Maple Grove | MN | — | ◇ UNVERIFIED |
| MRMerdian Rail Products CORP | Cicero | IL | — | ◇ UNVERIFIED |
| MIMeritor Industrial Products LLC | Chicago | IL | — | ◇ UNVERIFIED |
| MSMerit Specialities-merit Specialities | Saint Louis | MO | — | ◇ UNVERIFIED |
| MTMeritt Tool & Die | Vermontville | MI | — | ◇ UNVERIFIED |
| MTMeriwether Tool | Fort Wayne | IN | — | ◇ UNVERIFIED |
| MMMerrick Machine CO | Alda | NE | — | ◇ UNVERIFIED |
| MTMerritt Tool & Manufacturing, INC. | Sussex | WI | — | ◇ UNVERIFIED |
| MPMeschkat Precision Machining INC | Valencia | CA | — | ◇ UNVERIFIED |
| MAMetal Arc INC | Muskegon | MI | — | ◇ UNVERIFIED |
| MEMetalcraft Enterprises | Decatur | IN | — | ◇ UNVERIFIED |
| MMMetalcraft Machining | Southbridge | MA | — | ◇ UNVERIFIED |
| MSMetaldyne Sinterforged Products LLC | North Vernon | IN | — | ◇ UNVERIFIED |
| MFMetal Fab Products, Inc. | Odessa | TX | — | ◇ UNVERIFIED |
| MPMetalico Pgh INC | Pittsburgh | PA | — | ◇ UNVERIFIED |
| MCMetalite Corporation | Fort Worth | TX | — | ◇ UNVERIFIED |
| MLMetal Line CORP | Manistee | MI | — | ◇ UNVERIFIED |
| MMMetal & Machinery, INC. | La Fayette | GA | — | ◇ UNVERIFIED |
| MIMetalogic Industries LLC | Southbridge | MA | — | ◇ UNVERIFIED |
| MPMetal Parts | Cypress | CA | — | ◇ UNVERIFIED |
| MLMetalpro LLC | Old Saybrook | CT | — | ◇ UNVERIFIED |
| MIMetal-Tech, Inc. | New Castle | DE | — | ◇ UNVERIFIED |
| MTMetal Tech Midwest Incorporated | Joplin | MO | — | ◇ UNVERIFIED |
| MTMetal Technologies Dba Ravenna Ductile Iron Plant | Ravenna | MI | — | ◇ UNVERIFIED |
| MIMetaltek International, INC. | Pevely | MO | — | ◇ UNVERIFIED |
| MIMetaltek International, Sandusky International Division (0322020117) | Sandusky | OH | — | ◇ UNVERIFIED |
| MLMetavation LLC Vassar Plt | Vassar | MI | — | ◇ UNVERIFIED |
| MIMetco Incorporated | Anderson | SC | — | ◇ UNVERIFIED |
| MCMetem Corporation | Parsippany | NJ | — | ◇ UNVERIFIED |
| MDMethods Distributors and Manufacturers, INC. | Fox Lake | IL | — | ◇ UNVERIFIED |
| MMMetro Machine - Engineering CORP | Eden Prairie | MN | — | ◇ UNVERIFIED |
| MSMetro South Machining INC | Burnsville | MN | — | ◇ UNVERIFIED |
| MWMetro Welding & Fabricating, INC. | Big Bend | WI | — | ◇ UNVERIFIED |
| MMMetso Minerals Industries INC | Birmingham | AL | — | ◇ UNVERIFIED |
| MOMetso Outotec USA INC | Warrenton | MO | — | ◇ UNVERIFIED |
