| MPMidwest Production Solutions | Moran | KS | — | ◇ UNVERIFIED |
| MPMidwest Pro Manufacturing INC. | Rock Valley | IA | — | ◇ UNVERIFIED |
| MRMidwest Remanufacturing, LLC | Bedford Park | IL | — | ◇ UNVERIFIED |
| MSMidwest Stainless Technologies, LLC | Menomonie | WI | — | ◇ UNVERIFIED |
| MWMier Welding & Fabrication INC | Thornton | CO | — | ◇ UNVERIFIED |
| MDMike Dyell Machine Shop & Hydraulics, in | Rialto | CA | — | ◇ UNVERIFIED |
| MMMike's Machine Shop | Licking | MO | — | ◇ UNVERIFIED |
| MPMike's Performance & Machine Shop | Las Cruces | NM | — | ◇ UNVERIFIED |
| MHMilans Holdings Enterprises LLC | Doral | FL | — | ◇ UNVERIFIED |
| MWMilan Welding & Fabrication LLC | Merritt Island | FL | — | ◇ UNVERIFIED |
| MIMilark Industries, INC. | Mansfield | OH | — | ◇ UNVERIFIED |
| MMMile-hi Machine, INC. | Arvada | CO | — | ◇ UNVERIFIED |
| MMMiles Machine LLC | Waterboro | ME | — | ◇ UNVERIFIED |
| MRMilford Rivet | Fullerton | CA | — | ◇ UNVERIFIED |
| MMMilk Motorsports Fabrication LLC | Zanesville | OH | — | ◇ UNVERIFIED |
| MMMillcraft Mfg INC | San Jose | CA | — | ◇ UNVERIFIED |
| MMMillennium Machining, INC | Lewiston | UT | — | ◇ UNVERIFIED |
| MPMillennium Power Services, Inc. | Westfield | MA | — | ◇ UNVERIFIED |
| MMMiller Machined Products, INC. | Endeavor | WI | — | ◇ UNVERIFIED |
| MMMiller Machine & Mechanical Inc. | Mexico | NY | — | ◇ UNVERIFIED |
| MMMiller Machine & Mechanical, INC. | Mexico | NY | — | ◇ UNVERIFIED |
| MMMiller Machine Works, LLC | San Diego | CA | — | ◇ UNVERIFIED |
 Miller Welding & Machine Co/maplevale Plt | Brookville | PA | — | ◇ UNVERIFIED |
| MMMill Mechanical, LLC. | Monroe | OH | — | ◇ UNVERIFIED |
| MMMillpro Manufacturing and Engineering | Hawthorne | CA | — | ◇ UNVERIFIED |
| MPMill Pro Manufacturing LLC | Bluffdale | UT | — | ◇ UNVERIFIED |
| MPMill Pro Manufacturing LLC | Bluffdale | UT | — | ◇ UNVERIFIED |
| MMMills Mobile Welding Service LLC | Harmony | NC | — | ◇ UNVERIFIED |
| MMMillwood Metalworks INC | Freeport | MN | — | ◇ UNVERIFIED |
| MSMillwright Services | Fort Morgan | CO | — | ◇ UNVERIFIED |
| MAMinnesota Ag Power INC Howard Lake | Howard Lake | MN | — | ◇ UNVERIFIED |
| MMMinnesota Machining Incorporated | Wyoming | MN | — | ◇ UNVERIFIED |
| MWMinnesota Waterjet INC | Ramsey | MN | — | ◇ UNVERIFIED |
| MAMinova Americas Dba Minova Holdings INC. | Marion | IL | — | ◇ UNVERIFIED |
| MUMinova USA INC | Grundy | VA | — | ◇ UNVERIFIED |
| MUMinova USA INC. | Proctorville | OH | — | ◇ UNVERIFIED |
| MPMiratech Prior Lake INC | Prior Lake | MN | — | ◇ UNVERIFIED |
| MLMist123, LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| MMMitchell Machine Works, INC. | Dalton | GA | — | ◇ UNVERIFIED |
| MMMitchell Manufacturing, INC. | Tomball | TX | — | ◇ UNVERIFIED |
| MSMitchell & Son INC | Memphis | TN | — | ◇ UNVERIFIED |
| MCMJCA Companies, LLC | Blaine | MN | — | ◇ UNVERIFIED |
| MMMjj Machine Shop | Mission | TX | — | ◇ UNVERIFIED |
| MEMJLJ Enterprises, LLC | Anaheim | CA | — | ◇ UNVERIFIED |
| MJM. J. Machine, INC. | Bridgewater | MA | — | ◇ UNVERIFIED |
 Mjm Manufacturing Solutions INC | Swansea | MA | — | ◇ UNVERIFIED |
| MSMj System, LLC | Opelika | AL | — | ◇ UNVERIFIED |
| MMMkc Machine & Fab, INC. | Carrollton | GA | — | ◇ UNVERIFIED |
| MSMK Services Corp. | Middleton | MA | — | ◇ UNVERIFIED |
| MIMks Instruments INC. | Colorado Springs | CO | — | ◇ UNVERIFIED |
| MWMk Welding & Builds LLC | Fort Collins | CO | — | ◇ UNVERIFIED |
| MLM - L Industries INC | Rogers | MN | — | ◇ UNVERIFIED |
| MMM & M Certified Welding, INC. | Macedonia | OH | — | ◇ UNVERIFIED |
| MGMM Group 1 LLC | Morgan Hill | CA | — | ◇ UNVERIFIED |
| MMM & M Hydraulic CO | Roseville | MN | — | ◇ UNVERIFIED |
| MMmi | Sonora | CA | — | ◇ UNVERIFIED |
| MPMmi Precision LLC | Ramsey | MN | — | ◇ UNVERIFIED |
| MMMmj Machining and Fabricating, INC. | Randleman | NC | — | ◇ UNVERIFIED |
| MMM & M Machining | Salinas | CA | — | ◇ UNVERIFIED |
| MQM&m Quality Grinding | Hodgkins | IL | — | ◇ UNVERIFIED |
| MMM & M Tooling Inc | Patillas | PR | — | ◇ UNVERIFIED |
| MIModacam, Incorporated | Denver | NC | — | ◇ UNVERIFIED |
 Modern Machine and Metal Fabricators, INC. | Winston Salem | NC | — | ◇ UNVERIFIED |
| MMModern Machinery CO | Bay City | MI | — | ◇ UNVERIFIED |
| Modern Machine Shop, INC. | Laredo | TX | — | ◇ UNVERIFIED |
 Modern Machine Works, INC. | Bismarck | ND | — | ◇ UNVERIFIED |
| MCModular Concepts INC | Burnsville | MN | — | ◇ UNVERIFIED |
| MMMoeller Mfg and Supply INC | Anaheim | CA | — | ◇ UNVERIFIED |
| MBMoenter Bilt Performance Engineering, LLC | Woodville | OH | — | ◇ UNVERIFIED |
| MMMolalla Machine Shop INC | Molalla | OR | — | ◇ UNVERIFIED |
| MMMolenda Machining | Concord | CA | — | ◇ UNVERIFIED |
| MMMonalex Manufacturing, INC. | Douglas | MA | — | ◇ UNVERIFIED |
| MIMonogram Ind, Monogram Aerospace | Los Angeles | CA | — | ◇ UNVERIFIED |
| MMMonovision Machine, LLC | Massillon | OH | — | ◇ UNVERIFIED |
| MMMonroe Mold LLC | Monroe | MI | — | ◇ UNVERIFIED |
| MTMontague Tool and Manufacturing Company | Clio | MI | — | ◇ UNVERIFIED |
| MWMontemayor Welding | Dawn | TX | — | ◇ UNVERIFIED |
| MIMonti INC. Santa Teresa Plant | Santa Teresa | NM | — | ◇ UNVERIFIED |
| MFMoody Fabrication & Machine, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| MIMooney Industries Precision Machining | Canoga Park | CA | — | ◇ UNVERIFIED |
| MDMoore Dry Kiln Company of Ore* | Memphis | TN | — | ◇ UNVERIFIED |
| MMMorales Motorsports | Daly City | CA | — | ◇ UNVERIFIED |
| MMMorford Managers, LLC | Edgewood | NM | — | ◇ UNVERIFIED |
| MIMorlin, INC. | Erie | PA | — | ◇ UNVERIFIED |
| MBMorris Building LLC | Loveland | CO | — | ◇ UNVERIFIED |
| MMMorris Machine & Welding, INC. | Baxley | GA | — | ◇ UNVERIFIED |
| MCMorrison Custom Welding, INC. | Wooster | OH | — | ◇ UNVERIFIED |
| MEMorrison Engineering & Machining INC | Tualatin | OR | — | ◇ UNVERIFIED |
| MMMorton Manufacturing | Lancaster | CA | — | ◇ UNVERIFIED |
| MIMote INC Dba Allen Company | Minnetonka | MN | — | ◇ UNVERIFIED |
| MSMotive Systems Engineering CORP | Rancho Cordova | CA | — | ◇ UNVERIFIED |
| MTMotorsport Tech, INC. | Reno | NV | — | ◇ UNVERIFIED |
| MTMotorsport Tech, INC. | Sparks | NV | — | ◇ UNVERIFIED |
| MMMoundville Metal Works, INC | Moundville | AL | — | ◇ UNVERIFIED |
| MFMountaineer Fabricators INC | Nitro | WV | — | ◇ UNVERIFIED |
| MMMountaineer Machine & Hydraulics, INC. | Athens | WV | — | ◇ UNVERIFIED |
| MTMountain Town Machine CORP | Mount Sterling | KY | — | ◇ UNVERIFIED |
| MZMount Zion Machine LLC | Morgantown | IN | — | ◇ UNVERIFIED |
| MHMowdy Holdings LLC | Duncan | OK | — | ◇ UNVERIFIED |
| MGMp & G Machine & Design, INC. | Lewiston | ME | — | ◇ UNVERIFIED |
