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

Plants in Maryland37 FACILITIES

Facility	City	Employees	Status
Plymouth Tube Company	Salisbury	20–99	● ACTIVE
CICambridge International	Cambridge	100–499	● ACTIVE
Danko Arlington, INC.	Baltimore	—	● ACTIVE
Garrett Container Systems, INC.	Accident	—	● ACTIVE
Marlin Steel Wire Products LLC	Baltimore	—	● ACTIVE
Aclara Metals INC.	Bethesda	—	● ACTIVE
Aclara Technologies INC.	Bethesda	—	● ACTIVE
Caldwell Casting Co., INC.	Cambridge	—	● ACTIVE
Lacy Foundries LLC	Baltimore	—	● ACTIVE
ARAmg Resources CORP	Baltimore	—	◐ LIKELY ACTIVE
CBClendenin Brothers	Baltimore	—	◇ UNVERIFIED
EAEastalco Aluminum Company	Baltimore	—	◇ UNVERIFIED
TGThe Gill Corporation - Maryland	Edgewood	—	◐ LIKELY ACTIVE
RSRg Steel Sparrows Point LLC	Sparrows Point	—	◐ LIKELY ACTIVE
BWBlaine Window Hardware	Hagerstown	—	◇ UNVERIFIED
CCCianbro Corporation Baltimore Facility	Curtis Bay	—	◇ UNVERIFIED
EAEastalco Aluminum CO	Frederick	—	◇ UNVERIFIED
EAElf Atochem North America, INC	Baltimore	—	◇ UNVERIFIED
HEHalethorpe Extrusions Incorporated	Baltimore	—	◇ UNVERIFIED
MRMaryland Recycling	Baltimore	—	◇ UNVERIFIED
MSMaryland Specialty Wire	Cockeysville	—	◇ UNVERIFIED
MCMpa - Cox Creek	Baltimore	—	◇ UNVERIFIED
SSSchultz & Sons Salvage INC	Denton	—	◇ UNVERIFIED
TTechalloy	Baltimore	—	◇ UNVERIFIED
UIUnited Iron & Metal	Baltimore	—	◇ UNVERIFIED
VHVulcan Hart Corporation	Dundalk	—	◇ UNVERIFIED
WSWorthington Steel Company the	Baltimore	—	◇ UNVERIFIED
AIAmtrol Inc Baltimore	Sparrows Point	1–19	◐ LIKELY ACTIVE
AAAmerican Alloy Foundry INC	Baltimore	—	◇ UNVERIFIED
AMAnsam Metals CORP	Baltimore	—	◇ UNVERIFIED
BBBlack Briar Investments, LLC	North East	—	◇ UNVERIFIED
Boldmark Steel Industry, LLC	Baltimore	—	◇ UNVERIFIED
CICambridge Iron & Metal	Baltimore	—	◇ UNVERIFIED
DADesign Assistance Construction Systems INC	Sparrows Point	—	◇ UNVERIFIED
JIJ&d Industrial Services INC	Pasadena	—	◇ UNVERIFIED
MMMaryland Metals Processing, INC.	Sparrows Point	—	◇ UNVERIFIED
NANew Arts Bronze Studios INC	Baltimore	—	◇ UNVERIFIED

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