| APAccurate Perforating Co., INC. | Chicago | 100–499 | ● ACTIVE |
Ace Metal Crafts CO | Bensenville | — | ● ACTIVE |
Acme Industrial CO | Carpentersville | 100–499 | ● ACTIVE |
Advanced Machine & Engineering CO | Rockford | 100–499 | ● ACTIVE |
Affton Fabricating and Welding Co., INC. | Sauget | 20–99 | ● ACTIVE |
A. Finkl & Sons CO. | Chicago | 100–499 | ● ACTIVE |
| AIA.j.r. Industries, INC. | Elk Grove Village | 20–99 | ● ACTIVE |
Aldrico, INC. | Wyoming | 20–99 | ● ACTIVE |
Allied Locke Industries INC | Dixon | 100–499 | ● ACTIVE |
American Grinding & Machine CO | Chicago | 20–99 | ● ACTIVE |
Anchor-harvey Components LLC | Freeport | 1–19 | ● ACTIVE |
| AHApplied Hydraulics Corporation | Chicago | 1–19 | ● ACTIVE |
Ark Technologies, INC. | Saint Charles | 20–99 | ● ACTIVE |
Armoloy of Illinois INC | Dekalb | 20–99 | ● ACTIVE |
Ash Manufacturing Company | Plainfield | 1–19 | ● ACTIVE |
| ASA & S Machining & Welding, INC | Mccook | — | ● ACTIVE |
Astoria Wire Products INC | Bedford Park | 20–99 | ● ACTIVE |
| ATAtlas Tool & Die Works INC | Lyons | 20–99 | ● ACTIVE |
Avanti Engineering INC | Glendale Heights | 20–99 | ● ACTIVE |
| AGAzz Galvanizing Dixon | Dixon | 20–99 | ● ACTIVE |
Bales Mold Service, INC. | Downers Grove | 20–99 | ● ACTIVE |
Ballco Manufacturing Company, INC. | Aurora | 20–99 | ● ACTIVE |
Barrington Automation LTD | Lake in the Hills | 1–19 | ● ACTIVE |
Bbc Fasteners, INC. | Alsip | 20–99 | ● ACTIVE |
Bem Mold INC | Schaumburg | 100–499 | ● ACTIVE |
Bennett Metal Products INC. | Mount Vernon | — | ● ACTIVE |
Betts Precision, INC | Alsip | 20–99 | ● ACTIVE |
Big Bolt, LLC | Bloomingdale | 100–499 | ● ACTIVE |
Braun Manufacturing CO INC | Mount Prospect | 1–19 | ● ACTIVE |
Britt Industries, INC | Arlington Heights | 1–19 | ● ACTIVE |
Brynolf Manufacturing INC | Rockford | 20–99 | ● ACTIVE |
Burns Machine CO | Ottawa | 20–99 | ● ACTIVE |
Camcraft INC | Hanover Park | 100–499 | ● ACTIVE |
Cast Aluminum Solutions, LLC | Batavia | 100–499 | ● ACTIVE |
Catalytic Products International INC | Lake Zurich | 20–99 | ● ACTIVE |
| CPCentury Plating CO INC | Chicago | 20–99 | ● ACTIVE |
| CDCharter Dura-bar, INC. | Woodstock | — | ● ACTIVE |
Chem Processing INC | Rockford | 20–99 | ● ACTIVE |
Chicago Anodizing CO | Chicago | — | ● ACTIVE |
Classic Products INC | Mchenry | — | ● ACTIVE |
| CSCleveland Steel Container CORP | Peotone | 20–99 | ● ACTIVE |
Clifford-jacobs Forging Company | Champaign | 100–499 | ● ACTIVE |
| CAClinkenbeard & Associates INC | South Beloit | 1–19 | ● ACTIVE |
Columbia Metal Spinning CO | Chicago | 1–19 | ● ACTIVE |
Concept Industries INC | Elk Grove Village | 1–19 | ● ACTIVE |
Cope Plastics INC | Alton | 100–499 | ● ACTIVE |
Cornell Forge Company | Chicago | 100–499 | ● ACTIVE |
Craig Industries, INC. | Quincy | 20–99 | ● ACTIVE |
D & B Fabricators INC | Lemont | 1–19 | ● ACTIVE |
Deep Coat Industries LLC | Sugar Grove | 20–99 | ● ACTIVE |