| MIModernfold Inc Dyersville | Dyersville | IA | 100–499 | ◐ LIKELY ACTIVE |
| MMModern Metal Products | Owatonna | MN | 20–99 | ◐ LIKELY ACTIVE |
| MMModern Metals | Ashland | KY | 20–99 | ◐ LIKELY ACTIVE |
| MMModern Mold Corporation | Columbia Station | OH | — | ◐ LIKELY ACTIVE |
| MSModern Studio Equipment | Van Nuys | CA | 20–99 | ◐ LIKELY ACTIVE |
| MWModern Welding Company of Kentucky, Inc. (Madisonville) | Madisonville | KY | 20–99 | ◐ LIKELY ACTIVE |
| MTModesys Technologies, LLC | Providence | RI | — | ◐ LIKELY ACTIVE |
Modine Manufacturing Company - Absolute Air | Kalamazoo | MI | 20–99 | ◐ LIKELY ACTIVE |
Modine Manufacturing Company - Climate By Design | Owatonna | MN | 100–499 | ◐ LIKELY ACTIVE |
Modine Manufacturing Company - Dallas | Grand Prairie | TX | 1–19 | ◐ LIKELY ACTIVE |
Modine Manufacturing Company - Franklin WI | Franklin | WI | 20–99 | ◐ LIKELY ACTIVE |
Modine Manufacturing Company - Grenada CCP | Grenada | MS | 100–499 | ◐ LIKELY ACTIVE |
Modine Manufacturing Company - Grenada OEM | Grenada | MS | 500+ | ◐ LIKELY ACTIVE |
Modine Manufacturing Company - Jacksonville | Jacksonville | TX | 20–99 | ◐ LIKELY ACTIVE |
Modine Manufacturing Company - Longview | Longview | TX | 20–99 | ◐ LIKELY ACTIVE |
Modine Manufacturing Company - Louisville | Louisville | KY | 20–99 | ◐ LIKELY ACTIVE |
Modine Manufacturing Company - Natrual Bridge Station | Natural Bridge Station | VA | 20–99 | ◐ LIKELY ACTIVE |
Modine Manufacturing Company - Rockbridge | Lexington | VA | 500+ | ◐ LIKELY ACTIVE |
| MMMod Metal LLC | West End | NC | — | ◐ LIKELY ACTIVE |
| MTMod Tech Industries, Inc. | Shawano | WI | 20–99 | ◐ LIKELY ACTIVE |
| MModula | Lewiston | ME | 1–19 | ◐ LIKELY ACTIVE |
| MMMoeller Manufacturing & Supply, LLC | Brea | CA | — | ◐ LIKELY ACTIVE |
Mo Enterprises | Bakersfield | CA | — | ◐ LIKELY ACTIVE |
| MLMohawk Laboratories-Irving | Irving | TX | 20–99 | ◐ LIKELY ACTIVE |
| MAMoiron- A Div. of Leggett & Platt Components Co., Inc. | Sparta | MI | 20–99 | ◐ LIKELY ACTIVE |
| MCMojave CA Wheelshop | Mojave | CA | 20–99 | ◐ LIKELY ACTIVE |
| MMMojave Mountain Manufacturing LLC | Vail | AZ | — | ◐ LIKELY ACTIVE |
| MFMolded Fiber Glass | Morganton | NC | 100–499 | ◐ LIKELY ACTIVE |
| MFMolded Fiber Glass | Union City | PA | 20–99 | ◐ LIKELY ACTIVE |
Molded Products, INC. | Harlan | IA | — | ◐ LIKELY ACTIVE |
| MMMolding Media of America | Muskegon | MI | 1–19 | ◐ LIKELY ACTIVE |
| MSMolding Services of Illinois INC | Olney | IL | — | ◐ LIKELY ACTIVE |
| MSMolding Solutions, Inc. | Rome | NY | 20–99 | ◐ LIKELY ACTIVE |
| MMMold-Tech Midwest | Carol Stream | IL | 1–19 | ◐ LIKELY ACTIVE |
| MIMolecular Imaging - Crystal Growth Facility | Rockford | TN | 20–99 | ◐ LIKELY ACTIVE |
| MIMolecular Imaging - Detector Center | Rockford | TN | 20–99 | ◐ LIKELY ACTIVE |
| MIMolecular Imaging - Hoffman Estates Facility | Hoffman Estates | IL | 500+ | ◐ LIKELY ACTIVE |
| MIMolecular Imaging - Knoxville Facility | Knoxville | TN | 500+ | ◐ LIKELY ACTIVE |
| MIMolecular Imaging - R&D | Rockford | TN | 20–99 | ◐ LIKELY ACTIVE |
| MMMoly Manufacturing, LLC | Ellsworth | KS | 20–99 | ◐ LIKELY ACTIVE |
| MTMomentive Technologies - Willoughby | Willoughby | OH | 20–99 | ◐ LIKELY ACTIVE |
| MMMonarch Machine & Tool Co., INC. | Pasco | WA | — | ◐ LIKELY ACTIVE |
Monarc Holdings, INC | Rochester | NY | — | ◐ LIKELY ACTIVE |
| MVMonday Voigt Products, INC. | Anderson | IN | — | ◐ LIKELY ACTIVE |
| MAMondial Automotive, INC. | College Point | NY | — | ◐ LIKELY ACTIVE |
| MPMonett Plant | Monett | MO | 500+ | ◐ LIKELY ACTIVE |
| MHMonk's Hood Media, LLC | Mc Lean | VA | — | ◐ LIKELY ACTIVE |
| MEMono Engineering CORP. | Chatsworth | CA | — | ◐ LIKELY ACTIVE |
| MIMonoflo International | Ottawa | KS | 20–99 | ◐ LIKELY ACTIVE |
| MAMonogram Aerospace Fasteners AZ | Mesa | AZ | 20–99 | ◐ LIKELY ACTIVE |