Cathedral Stone Products, INC | Hanover | MD | Nonmetallic Mineral Product Manufacturing327310 | 1-19 | ● ACTIVE |
Chesapeake Specialty Products, INC. | Sparrows Point | MD | Nonmetallic Mineral Product Manufacturing327910 | 1-19 | ● ACTIVE |
Maryland Portable Concrete, INC. | Havre De Grace | MD | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ● ACTIVE |
Washington Wilbert Vault Works, INC. | Laurel | MD | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ● ACTIVE |
Dc Scientific, INC. | Glen Burnie | MD | Nonmetallic Mineral Product Manufacturing327212 | 1-19 | ● ACTIVE |
Reagg LLC | Temple Hills | MD | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ● ACTIVE |
| TITrans-tech, INC. | Adamstown | MD | Nonmetallic Mineral Product Manufacturing327110 | 100-499 | ● ACTIVE |
Arkadia, LLC | Annapolis | MD | Nonmetallic Mineral Product Manufacturing327991 | — | ● ACTIVE |
Carma Enterprises Limited Liability Company | Lexington Park | MD | Nonmetallic Mineral Product Manufacturing327991 | — | ● ACTIVE |
| HNHilgartner Natural Stone Co., INC. | Baltimore | MD | Nonmetallic Mineral Product Manufacturing327991 | — | ● ACTIVE |
Jj Innovative Materials, INC. | Baltimore | MD | Nonmetallic Mineral Product Manufacturing327120 | — | ● ACTIVE |
| MCMaryland China Company INC. | Reisterstown | MD | Nonmetallic Mineral Product Manufacturing327110 | — | ● ACTIVE |
Nelson Precast Products, LLC | Baltimore | MD | Nonmetallic Mineral Product Manufacturing327390 | — | ● ACTIVE |
Richards-wilbert INC | Hagerstown | MD | Nonmetallic Mineral Product Manufacturing327390 | — | ● ACTIVE |
The Maryland Ceramics and Steatite Company, INC. | Street | MD | Nonmetallic Mineral Product Manufacturing327110 | — | ● ACTIVE |
Tr Granite & Stone Studio LLC | Bethesda | MD | Nonmetallic Mineral Product Manufacturing327991 | — | ● ACTIVE |
Walpanel INC. | Bowie | MD | Nonmetallic Mineral Product Manufacturing327390 | — | ● ACTIVE |
| ACAtlantic Concrete MD, LLC | Cockeysville | MD | Nonmetallic Mineral Product Manufacturing327332 | 20-99 | ◐ LIKELY ACTIVE |
| TATate Access Floors | Jessup | MD | Nonmetallic Mineral Product Manufacturing327390 | 100-499 | ▲ REPORTED CLOSED |
| HBHagerstown Block CO | Hagerstown | MD | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| SCSchuster Concrete Ready Mix Llc-hobbs Rd | Denton | MD | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| DGDaniel G. Schuster, LLC - Portable Plant #5 | Baltimore | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| MPMaryland Portable Concrete-riverside | Aberdeen | MD | Petroleum and Coal Products Manufacturing324121 | 20-99 | ◐ LIKELY ACTIVE |
| NNNew Ngc, INC. Dba National Gypsum Company | Highlandtown | MD | Nonmetallic Mineral Product Manufacturing327420 | — | ◐ LIKELY ACTIVE |
| PCPowercon Corporation | Severn | MD | Nonmetallic Mineral Product Manufacturing327110 | 100-499 | ◐ LIKELY ACTIVE |
| QCQuikrete Company | Perryville | MD | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| SSScientific Specialties Service INC | Hanover | MD | Nonmetallic Mineral Product Manufacturing327213 | 20-99 | ◐ LIKELY ACTIVE |
| TUThe United States Gypsum Company - Baltimore Plant | Baltimore | MD | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| AHAmrize Hagerstown Cement Plant (formerly Holcim Ha | Hagerstown | MD | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| CQCapital Quickrete | Clinton | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| CPConcrete Pipe & Products | Jessup | MD | Nonmetallic Mineral Product Manufacturing327332 | — | ◐ LIKELY ACTIVE |
| DGDaniel G. Schuster, INC. - Frederick Plant | Frederick | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials US Cement LLC | Union Bridge | MD | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| LBLafarge Building Material INC | Sparrows Point | MD | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| MCMerit Concrete | Laurel | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| RBRedland Brick | Rocky Ridge | MD | Nonmetallic Mineral Product Manufacturing327120 | — | ◐ LIKELY ACTIVE |
| SCSchuster Concrete Ready Mix, LLC | Owings Mills | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| SCS&g Concrete Brooklyn Plant | Baltimore | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| SCS&g Concrete Company | Odenton | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| SGS & G Concrete Company, Llc- Grantley Ave. Plant | Baltimore | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CPContractors Precast CORP. | Davidsonville | MD | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| OPOldcastle Precast INC. | Edgewood | MD | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| FMFrostburg Memorials | Frostburg | MD | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◇ UNVERIFIED |
| LMLaney Materials LLC - Laney Recycling and Aggregates | Laurel | MD | Nonmetallic Mineral Product Manufacturing327992 | 20-99 | ◇ UNVERIFIED |
| LILocke Insulators INC | Baltimore | MD | Nonmetallic Mineral Product Manufacturing327110 | — | ◇ UNVERIFIED |
| MEMaier, Ernst, INC. | Bladensburg | MD | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◇ UNVERIFIED |
| BRBack River Wastewater Treatment Facility | Baltimore | MD | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| BPBWIP Pavestone | Hagerstown | MD | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| DMD.c. Materials | Hyattsville | MD | Nonmetallic Mineral Product Manufacturing327123 | — | ◐ LIKELY ACTIVE |
| DMDimensional Marble & Tile, INC. | Rockville | MD | Nonmetallic Mineral Product Manufacturing327991 | 20-99 | ◐ LIKELY ACTIVE |