| LLockport | Lockport | NY | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| LPLonestar Prestress Mfg., Inc. | Bellville | TX | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
Mack Industries of Bowling Green | Bowling Green | OH | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
Mack Industries of Michigan | White Lake | MI | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
Mack Industries of North Carolina | Rocky Mount | NC | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
Mack Industries of PA | Vienna | OH | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MQMAF Quikrete | Midland | TX | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MPMammoth Precast Solutions, INC. | Omaha | NE | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| MIMarkham INC | N Chesterfield | VA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MIMarkham INC | N. Chesterfield | VA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MLMarshfield Location | Marshfield | MA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MMMasons Mark Youngwood, PA | Youngwood | PA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| MMassarelli's | Hammonton | NJ | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MMbo | Carver | MA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MCMDC Contracting LLC | Charlevoix | MI | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MQMDT Quikrete | Paxinos | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MMMemorial Monuments Salt Lake City | Salt Lake City | UT | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| MBMemphis Burial Vault Company | Memphis | TN | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MVMerz Vault Company, INC | Salem | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| MQMIA3 Quikrete | Doral | FL | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MQMIA Quikrete | Medley | FL | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MCMichie Concrete Products, LLC | Henniker | NH | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MLMississippi Limestone CORP | Friars Point | MS | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| MTMI Trenton Plant | Trenton | MI | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MQMKE Quikrete | Sussex | WI | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MQMKJ Quikrete | Chilhowie | VA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MMm-q | Atlanta | GA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| MCModified Concrete Suppliers, LLC | Indianapolis | IN | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MQMSY Quikrete | Harahan | LA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MCMurphy Cormier General Contractor INC | Lake Charles | LA | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| MPM&W Precast, LLC | Ottsville | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| NFNaperville Field Office | Naperville | IL | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| NMNCAM Monarch Mountain | Tulelake | CA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| NINebco INC | Lincoln | NE | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| NCNew Castle Plant | New Castle | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| NCNitterhouse Concrete Products | Chambersburg | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| NMNitterhouse Masonry Products | Chambersburg | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| NMNitterhouse Masonry Products- GS | Chambersburg | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| NMNorth Metro | East Bethel | MN | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| OQOKC Quikrete | Oklahoma City | OK | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| OCOld Covington Highway Facility | Conyers | GA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| OPOlson Precast of Arizona | Phoenix | AZ | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| OQORL Quikrete | Kissimmee | FL | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| OQOrnamentacion Quintana, INC | Dorado | PR | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
Outdoor Creations Inc. - LOC 01 | Anderson | CA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
Outdoor Creations, Inc. - LOC 03 | Anderson | CA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| PAP&D Architectural Precast Inc. | La Grange | NC | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| PAP&D Architectural Precast Inc. | Lagrange | NC | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| PQPDX Quikrete | NE Aurora | OR | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| PLPete Lien & Sons Rapid City Central Mix | Rapid City | SD | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |