| MPMicron PharmaWorks LLC | Odessa | FL | 20–99 | ◐ LIKELY ACTIVE |
| MLMicrophoto, LLC | Roseville | MI | 1–19 | ◐ LIKELY ACTIVE |
| MLMicroPrecision LLC | Delavan | WI | 100–499 | ◐ LIKELY ACTIVE |
| MPMicro Precision Swiss, LLC (dba Orchid MPS, Orchid Santa Ana, Orchid Keller, Orchid Torrance) | Santa Ana | CA | 100–499 | ◐ LIKELY ACTIVE |
| MSMicrotech Shar Systems LLC | Fort Wayne | IN | 1–19 | ◐ LIKELY ACTIVE |
| MIMicro-Tronics, Inc | Tempe | AZ | 100–499 | ◐ LIKELY ACTIVE |
| M4Microvention 45 | Aliso Viejo | CA | 100–499 | ◐ LIKELY ACTIVE |
| MHMid-America Hydraulic Repair, Inc | La Cygne | KS | 1–19 | ◐ LIKELY ACTIVE |
| MFMid-Atlantic Fabrication and Finishing | Knightdale | NC | 20–99 | ◐ LIKELY ACTIVE |
| MMMiddleby Marshall Inc. | Elgin | IL | 20–99 | ◐ LIKELY ACTIVE |
| MPMiddleby Packaging Solutions - Appleton | Appleton | WI | 1–19 | ◐ LIKELY ACTIVE |
| MPMiddleby Packaging Solutions - Elgin | Elgin | IL | 100–499 | ◐ LIKELY ACTIVE |
| MGMiddle Georgia Diversified Industries, INC | Eastman | GA | — | ◐ LIKELY ACTIVE |
| MCMiddletown CC AKS Steel | Middletown | OH | 20–99 | ◐ LIKELY ACTIVE |
| MCMidland Chutes Acquisition Company LLC | Elgin | IL | 20–99 | ◐ LIKELY ACTIVE |
| MLMidland Levare US Inc | Midland | TX | 100–499 | ◐ LIKELY ACTIVE |
| MMMidland Machinery | Buffalo | NY | 20–99 | ◐ LIKELY ACTIVE |
| MOMidland Operations | Midland | TX | 1–19 | ◐ LIKELY ACTIVE |
| MCMidmark - Carthage | Carthage | MO | 20–99 | ◐ LIKELY ACTIVE |
| MCMidmark-Kansas City | Kansas City | KS | 100–499 | ◐ LIKELY ACTIVE |
| MMMid-south Metal Buildings LLC | Hernando | MS | — | ◐ LIKELY ACTIVE |
| MSMid-state Stainless, INC. | Grantsburg | WI | — | ◐ LIKELY ACTIVE |
| MMMidway Machining Incorporated | Mandan | ND | 1–19 | ◐ LIKELY ACTIVE |
| MBMidwest Blow Molding LLC | Vandalia | IL | 1–19 | ◐ LIKELY ACTIVE |
| MBMidwest Brazing LLC DBA East-Lind Heat Treat | Madison Heights | MI | 20–99 | ◐ LIKELY ACTIVE |
| MDMidwest Defense & More LLC | Florissant | MO | — | ◐ LIKELY ACTIVE |
| MIMidwest Industrial Sales | Gardner | IL | 20–99 | ◐ LIKELY ACTIVE |
| MWMid West Industries & Development, LTD | Mcpherson | KS | 20–99 | ◐ LIKELY ACTIVE |
| MMMid-West Mfg., Inc. - a div. of Mid-West Innovators, Inc. | Alpena | MI | 20–99 | ◐ LIKELY ACTIVE |
| MMMidwest Mixer Service, LLC | Scott City | KS | — | ◐ LIKELY ACTIVE |
Midwest Precision Machining | Monticello | MN | 20–99 | ◐ LIKELY ACTIVE |
| MPMidwest Products and Engineer | Sturtevant | WI | 20–99 | ◐ LIKELY ACTIVE |
| MPMidwest Products and Engineering Distribution Center | Meonomonee Falls | WI | 1–19 | ◐ LIKELY ACTIVE |
| MPMidwest Products and Engineering Material Service Center | Milwaukee | WI | 1–19 | ◐ LIKELY ACTIVE |
| MRMidwest Rescue Tools LLC | Milton | WI | — | ◐ LIKELY ACTIVE |
| MSMidwest Screw Products, Inc. | Brooklyn Center | MN | 20–99 | ◐ LIKELY ACTIVE |
| MTMidwest Trailers, LLC | Clinton | KY | — | ◐ LIKELY ACTIVE |
| MBMidyette Bros. Manufacturing INC | Virginia Beach | VA | — | ◐ LIKELY ACTIVE |
| MNMII NJ1 Medical Indicators, Inc. | Hamilton | NJ | 20–99 | ◐ LIKELY ACTIVE |
| MTMikros Technologies | Claremont | NH | 20–99 | ◐ LIKELY ACTIVE |
| MCMilitary Cadence Mc Promotions INC | Sarasota | FL | — | ◐ LIKELY ACTIVE |
| MRMilk River Metal Works LLC | Malta | MT | — | ◐ LIKELY ACTIVE |
| MMMillbrook Machining LLC | Millbrook | NY | — | ◐ LIKELY ACTIVE |
| MCMill Creek Machining | Paullina | IA | 20–99 | ◐ LIKELY ACTIVE |
| MSMillennium Steel of Texas | San Antonio | TX | 100–499 | ◐ LIKELY ACTIVE |
| MSMillennium Systems International, LLC | Havre De Grace | MD | — | ◐ LIKELY ACTIVE |
| MMMiller Manufacturing Glencoe DC | Glencoe | MN | 20–99 | ◐ LIKELY ACTIVE |
| MPMiller Precision Mfg. Industries, Inc. | Ottoville | OH | 20–99 | ◐ LIKELY ACTIVE |
| MMMillers Manufacturing LLC | North Franklin | CT | — | ◐ LIKELY ACTIVE |
| MIMillifab INC. | Covina | CA | — | ◐ LIKELY ACTIVE |