| company | role | hq | verified |
|---|
| MARION CENTER SUPPLY INC | DIST | — (US) | 1 mfrs |
| MCCANN CONST | DIST | — (US) | 1 mfrs |
| Mega Supply Pro megasupplypro.com | DIST | Bensalem, PA (US) | 1 mfrs |
| MENAREK STAMPED CONCRETE | DIST | Union Grove, WI (US) | 1 mfrs |
| Metropolitan Concrete Products | DIST | Sterling Heights, MI (US) | 1 mfrs |
| Metro Sealant metrosealant.com | DIST | — (US) | 1 mfrs |
| MILWAUKEE PLATE GLASS CO. milwaukeeplateglass.com | DIST | West Allis, WI (US) | 1 mfrs |
| Miyake Concrete Accessories miyakeconcrete.com | DIST | — (US) | 1 mfrs |
| MMI of Kentucky cmcmmi.com | DIST | Lexington, KY (US) | 1 mfrs |
| MULLER CONSTRUCTION SPLY | DIST | San Francisco, CA (US) | 1 mfrs |
| MULTIPLE CONCRETE ACC. | DIST | Brookfield, WI (US) | 1 mfrs |
| NATIONAL FLAT GLASS PRODUCTS nationalglassproducts.com | DIST | Englewood, CO (US) | 1 mfrs |
| Newark Supplies, LLC newarksupplies.com | DIST | Newark, NJ (US) | 1 mfrs |
| NEW BERLIN REDI-MIX INC | DIST | New Berlin, WI (US) | 1 mfrs |
| New South newsouthsupply.com | DIST | — (US) | 1 mfrs |
| NIKKA CORPORATION nikkacorp.com | DIST | Marietta, GA (US) | 1 mfrs |
| Norkan/Baxter | DIST | River Rouge, MI (US) | 1 mfrs |
| Northwestern Glass Fab bringlass.com | DIST | St. Minneapolis, MN (US) | 1 mfrs |
| NW CONSTRUCTION SPLY | DIST | — (US) | 1 mfrs |
| NW CONSTRUCTION SUPPLY | DIST | — (US) | 1 mfrs |