| APAccurate Perforating Co., INC. | Chicago | 100–499 | ● ACTIVE |
| AIA.j.r. Industries, INC. | Elk Grove Village | 20–99 | ● ACTIVE |
American Grinding & Machine CO | Chicago | 20–99 | ● ACTIVE |
Astoria Wire Products INC | Bedford Park | 20–99 | ● ACTIVE |
| ATAtlas Tool & Die Works INC | Lyons | — | ● ACTIVE |
Bbc Fasteners, INC. | Alsip | 20–99 | ● ACTIVE |
Betts Precision, INC | Alsip | 20–99 | ● ACTIVE |
| CPCentury Plating CO INC | Chicago | 20–99 | ● ACTIVE |
Cornell Forge Company | Chicago | 100–499 | ● ACTIVE |
Ella Engineering Incorporated | Elk Grove Village | 20–99 | ● ACTIVE |
Fotofab, LLC | Chicago | 20–99 | ● ACTIVE |
Magnetic Inspection Laboratory, INC | Elk Grove Village | 100–499 | ● ACTIVE |
Mah Machine Company | Cicero | 20–99 | ● ACTIVE |
Marathon Cutting Die INC | Wheeling | 20–99 | ● ACTIVE |
| MSMaterial Sciences CORP | Elk Grove Village | 20–99 | ● ACTIVE |
Mech Tronics CORP | Melrose Park | 20–99 | ● ACTIVE |
Panek Precision Products LLC | Northbrook | 100–499 | ● ACTIVE |
Saporito Finishing CO | Cicero | 100–499 | ● ACTIVE |
| SFSenior Flexonics | Bartlett | 100–499 | ● ACTIVE |
Servi-sure, LLC | Chicago | — | ● ACTIVE |
| SISkolnik Industries LLC | Chicago | 100–499 | ● ACTIVE |
| WBWaltz Brothers, INC. | Wheeling | — | ● ACTIVE |
| AFAcme Finishing CO LLC | Elk Grove Village | 100–499 | ● ACTIVE |
A. Finkl & Sons CO. | Chicago | — | ● ACTIVE |
Alanson Mfg L.l.c | Chicago | — | ● ACTIVE |
Britt Industries, INC | Arlington Heights | — | ● ACTIVE |
Chicago Anodizing CO | Chicago | — | ● ACTIVE |
| CMChicago Metal Rolled Products Company | Chicago | 20–99 | ● ACTIVE |
| CMChucking Machine Products, INC. | Franklin Park | 20–99 | ● ACTIVE |
Columbia Metal Spinning CO | Chicago | 20–99 | ● ACTIVE |
Concept Industries INC | Elk Grove Village | 1–19 | ● ACTIVE |
Dexter Magnetic Technologies, INC. | Elk Grove Village | 100–499 | ● ACTIVE |
| DADjw Assembly INC | Arlington Heights | — | ● ACTIVE |
Dynomax INC | Wheeling | — | ● ACTIVE |
E. J. Basler CO. | Schiller Park | — | ● ACTIVE |
Equinox Group INC | Chicago | — | ● ACTIVE |
Era Industries, LLC | Elk Grove Village | — | ● ACTIVE |
Fjw Optical Systems, INC | Palatine | — | ● ACTIVE |
| GMGeneral Manufacturing LLC | Melrose Park | — | ● ACTIVE |
Graymills Corporation | Broadview | 20–99 | ● ACTIVE |
Hyspan Precision Products INC | South Holland | — | ● ACTIVE |
Imprex International, INC | Arlington Heights | — | ● ACTIVE |
| JCJohn Crane, INC | Morton Grove | — | ● ACTIVE |
Manor Tool & Manufacturing CO | Schiller Park | — | ● ACTIVE |
Mercury Products CORP | Schaumburg | — | ● ACTIVE |
Metal Impact LLC | Elk Grove Village | — | ● ACTIVE |
Methode Electronics INC | Rolling Meadows | — | ● ACTIVE |
M & R Precision Machining INC | Elk Grove Village | — | ● ACTIVE |
Nkp Metals LLC | Chicago | — | ● ACTIVE |
North American E.n., INC. | Elk Grove Village | — | ● ACTIVE |