Primary Metal Manufacturing in Illinois
NAICS 331 · IL
This register lists 550 facilities in Illinois. The Bureau of Labor Statistics counted 336 establishments in the Primary Metal Manufacturing industry in Illinois in 2025. Mapleton Foundry in Mapleton employed 1,186 people in 2025.
SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE
Map, cities and product lines
Plants in Illinois19 FACILITIES
Listing 19 of 26: the facilities with a website, a size band or two sources on record. The rest are in site search.
| Facility | City | Employees | Status |
|---|---|---|---|
| Ark Technologies, INC. | Saint Charles | 20–99 | ACTIVE |
| Aurora Metals Division LLC | Montgomery | 20–99 | ACTIVE |
| Cast Aluminum Solutions, LLC | Batavia | 100–499 | ACTIVE |
| Custom Aluminum Products INC | South Elgin | 100–499 | ACTIVE |
| Dynacast, LLC | Elgin | 100–499 | ACTIVE |
| Combined Metals Company, LLC | Elgin | 20–99 | ACTIVE |
| Albaksan Advanced Copper Alloys LLC | Sugar Grove | — | ACTIVE |
| Tri Star Metals, LLC | Aurora | — | ACTIVE |
| Combined Metals Company LLC - Hampshire | Hampshire | 100–499 | LIKELY ACTIVE |
| Great Lakes Precision Tube, INC. | Aurora | 20–99 | LIKELY ACTIVE |
| Trio Foundry Inc | Montgomery | 20–99 | LIKELY ACTIVE |
| Elgiloy Specialty Metals | Hampshire | — | LIKELY ACTIVE |
| National Metalwares L.p. | Aurora | 100–499 | UNVERIFIED |
| Batavia Foundry & Machine CO | Batavia | — | LIKELY ACTIVE |
| Epix Tube Company, INC. | Aurora | — | UNVERIFIED |
| Lunt Maufacturing CO INC | Hampshire | — | UNVERIFIED |
| Precise Castings INC | Saint Charles | — | UNVERIFIED |
| Rubicon Technology | Batavia | — | UNVERIFIED |
| Trio Foundry INC | Aurora | — | UNVERIFIED |
All primary metal manufacturing nationwide · All manufacturing in Illinois