| HNHilgartner Natural Stone Co., INC. | Baltimore | — | ● ACTIVE |
Jj Innovative Materials, INC. | Baltimore | — | ● ACTIVE |
Nelson Precast Products, LLC | Baltimore | — | ● ACTIVE |
| DGDaniel G. Schuster, LLC - Portable Plant #5 | Baltimore | — | ◐ LIKELY ACTIVE |
| TUThe United States Gypsum Company - Baltimore Plant | Baltimore | — | ◐ LIKELY ACTIVE |
| SCS&g Concrete Brooklyn Plant | Baltimore | — | ◐ LIKELY ACTIVE |
| SGS & G Concrete Company, Llc- Grantley Ave. Plant | Baltimore | — | ◇ UNVERIFIED |
| BRBack River Wastewater Treatment Facility | Baltimore | — | ◐ LIKELY ACTIVE |
| RMRecovermat Mid-atlantic, LLC | Baltimore | — | ◐ LIKELY ACTIVE |
| LILocke Insulators INC | Baltimore | — | ◇ UNVERIFIED |
| OMOpta Minerals | Baltimore | — | ◇ UNVERIFIED |
| BRBay Ready Mix of Maryland Llc | Baltimore | 20–99 | ◐ LIKELY ACTIVE |
| GBGold Bond Building Products - Baltimore | Baltimore | 100–499 | ◐ LIKELY ACTIVE |
| UGUS Gypsum Baltimore | Baltimore | 100–499 | ◐ LIKELY ACTIVE |
| 1W1501 W. Patapsco, LLC | Baltimore | — | ◇ UNVERIFIED |
| AIAtlantic Imprints, Inc. | Baltimore | — | ◇ UNVERIFIED |
| CGCarr-lowrey Glass | Baltimore | — | ◇ UNVERIFIED |
| CRConcierge Remodeling Services, INC. | Baltimore | — | ◇ UNVERIFIED |
| CWConcrete Works INC | Baltimore | — | ◇ UNVERIFIED |
| CFCountry Floral Supply INC | Baltimore | — | ◇ UNVERIFIED |
| LNLafarge North America INC. and Its Successors | Baltimore | — | ◇ UNVERIFIED |
| MQMillville Quarry | Baltimore | — | ◇ UNVERIFIED |
Nelson Precast Products, LLC | Baltimore | — | ◇ UNVERIFIED |
| SGS - G Concrete Company, Llc- Grantley Ave. Plant | Baltimore | — | ◇ UNVERIFIED |
| VMVulcan Materials Company | Baltimore | — | ◇ UNVERIFIED |
| VMVulcan Materials Company | Baltimore | — | ◇ UNVERIFIED |