| MSMarion Silverline Extrusion | Marion | OH | 20–99 | ◐ LIKELY ACTIVE |
| MNMariplast North America | Greer | SC | 20–99 | ◐ LIKELY ACTIVE |
| MPMarkey Paper & Packaging, INC. | Zieglerville | PA | — | ◐ LIKELY ACTIVE |
| MIMar-Mac Industries, Inc. | Mcbee | SC | 20–99 | ◐ LIKELY ACTIVE |
| MCMarvin Composites - Fargo | Fargo | ND | 100–499 | ◐ LIKELY ACTIVE |
| MCMarvin Composites - Salem | Salem | VA | 100–499 | ◐ LIKELY ACTIVE |
| MMMarvin Modern - Fargo | Fargo | ND | 100–499 | ◐ LIKELY ACTIVE |
| MWMarvin Windows and Doors - Kansas City | Kansas City | KS | 20–99 | ◐ LIKELY ACTIVE |
| MWMarvin Windows and Doors - Roanoke | Roanoke | VA | 500+ | ◐ LIKELY ACTIVE |
| MSMaryland Spring | Baltimore | MD | 20–99 | ◐ LIKELY ACTIVE |
| MRMasonry Reinforcing Corp of America dba Wirebond | Charlotte | NC | 100–499 | ◐ LIKELY ACTIVE |
| MLMasterMold LLC Johnson Creek | Johnson Creek | WI | 100–499 | ◐ LIKELY ACTIVE |
| MSMaster Spas (Indiana) | Fort Wayne | IN | 500+ | ◐ LIKELY ACTIVE |
| MSMaster Spas (Michigan) | Grand Rapids | MI | 1–19 | ◐ LIKELY ACTIVE |
| MSMaster Spring and Wire Form, Co. | Roselle | IL | 20–99 | ◐ LIKELY ACTIVE |
| MHMaterial Handling Division | Nashville | TN | 100–499 | ◐ LIKELY ACTIVE |
| MAMatikon America Inc. | Auburn Hills | MI | 100–499 | ◐ LIKELY ACTIVE |
| MCMativ Conwed LLC | Roanoke | VA | 20–99 | ◐ LIKELY ACTIVE |
| MCMativ Conwed, LLC | New Berlin | WI | 100–499 | ◐ LIKELY ACTIVE |
| MPMativ (Conwed Plastics) | Athens | GA | 20–99 | ◐ LIKELY ACTIVE |
| MPMauser packaging solutions | South Plainfield | NJ | 20–99 | ◐ LIKELY ACTIVE |
| MPMauser Packaging Solutions | Clarkston | MI | 20–99 | ◐ LIKELY ACTIVE |
| MPMauser Packaging Solutions | Bolingbrook | IL | 20–99 | ◐ LIKELY ACTIVE |
| MPMauser Packaging Solutions Mt Vernon IBC | Mount Vernon | OH | 100–499 | ◐ LIKELY ACTIVE |
| MPMauser Packaging Solutions - Woodlands IBC | Conroe | TX | 20–99 | ◐ LIKELY ACTIVE |
| MTMayco Toledo | Toledo | OH | 100–499 | ◐ LIKELY ACTIVE |
| MWMayco Warren | Warren | MI | 100–499 | ◐ LIKELY ACTIVE |
| MPMaysville Plant | Maysville | KY | 100–499 | ◐ LIKELY ACTIVE |
| MNMaze Nails | Peru | IL | 20–99 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Baltimore) | Baltimore | MD | 20–99 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Baton Rouge, LA) | Gonzales | LA | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Carter Rd, OH) | Cleveland | OH | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Charlotte, NC) | Charlotte | NC | 20–99 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Chattanooga, TN) | Chattanooga | TN | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Cincinnati, OH) | Cincinnati | OH | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Cleveland, OH) | Cleveland | OH | 100–499 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Dallas, TX) | Dallas | TX | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Denver) | Denver | CO | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Distribution Center) | Memphis | TN | 20–99 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Dolomite) | Dolomite | AL | 20–99 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (East Chicago, IN) | East Chicago | IN | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Granite City) | Granite City | IL | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Lafayette) | Lafayette | LA | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Longview) | Longview | TX | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Memphis) | Memphis | TN | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Oklahoma City) | Oklahoma City | OK | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Pittsburgh, PA) | Cranberry Twp | PA | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (San Antonio) | San Antonio | TX | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Vancouver) | Vancouver | WA | 1–19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Virginia Beach, VA) | Virginia Beach | VA | 20–99 | ◐ LIKELY ACTIVE |