Primary Metal Manufacturing in Maryland
NAICS 331 · MD
Maryland is the location of Primary Metal Manufacturing facilities with a location quotient of 0.13, according to the Bureau of Labor Statistics in 2024. Listed in the register are 37 facilities in 15 cities across Maryland as of 2026, with 13 of those facilities reporting they are currently operating. CAMBRIDGE INTERNATIONAL in Cambridge employed 136 people in 2025, alongside PLYMOUTH TUBE COMPANY in Salisbury with 75 employees and Amtrol Inc Baltimore in Sparrows Point with 5 employees.
SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE
Map, cities and product lines
Plants in Maryland11 FACILITIES
| Facility | City | Employees | Status |
|---|---|---|---|
| Lacy Foundries LLC | Baltimore | — | ACTIVE |
| Amg Resources CORP | Baltimore | — | LIKELY ACTIVE |
| Rg Steel Sparrows Point LLC | Sparrows Point | — | LIKELY ACTIVE |
| Halethorpe Extrusions Incorporated | Baltimore | — | UNVERIFIED |
| Maryland Recycling | Baltimore | — | UNVERIFIED |
| Maryland Specialty Wire | Cockeysville | — | UNVERIFIED |
| Vulcan Hart Corporation | Dundalk | — | UNVERIFIED |
| Worthington Steel Company the | Baltimore | — | UNVERIFIED |
| Amtrol Inc Baltimore | Sparrows Point | 1–19 | LIKELY ACTIVE |
| Design Assistance Construction Systems INC | Sparrows Point | — | UNVERIFIED |
| Maryland Metals Processing, INC. | Sparrows Point | — | UNVERIFIED |
All primary metal manufacturing nationwide · All manufacturing in Maryland