| CHChicago Hardware & Fixture CO | Franklin Park | IL | Fabricated Metal Product Manufacturing332510 | 20-99 | ◐ LIKELY ACTIVE |
| CIColony INC | Elgin | IL | Fabricated Metal Product Manufacturing332618 | — | ◐ LIKELY ACTIVE |
| CCConex Cable LLC | Dekalb | IL | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| CSContour Screw Products INC | Arlington Heights | IL | Fabricated Metal Product Manufacturing332721 | 20-99 | ◐ LIKELY ACTIVE |
| CMCorrugated Metals, INC. | Belvidere | IL | Fabricated Metal Product Manufacturing332114 | 20-99 | ◐ LIKELY ACTIVE |
| CCCrown Cork & Seal USA, Inc - Alsip Plant | Alsip | IL | Fabricated Metal Product Manufacturing332431 | 20-99 | ◐ LIKELY ACTIVE |
| DADavid Architectural Metals INC | Chicago | IL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| DVDixon Valve | Westmont | IL | Fabricated Metal Product Manufacturing332721 | — | ◐ LIKELY ACTIVE |
| DTDomeny Tool & Stamping CO | Wauconda | IL | Fabricated Metal Product Manufacturing332119 | 20-99 | ◐ LIKELY ACTIVE |
| DIDynomax, Inc. | Wheeling | IL | Fabricated Metal Product Manufacturing332710 | 100-499 | ◐ LIKELY ACTIVE |
| EHEaton Hydraulics | Machesney Park | IL | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| EME.C. Machining Inc | Justice | IL | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| EBE.h. Baare CORP | Robinson | IL | Primary Metal Manufacturing331222 | — | ◐ LIKELY ACTIVE |
| ETElba Tool Company, INC. | Bloomingdale | IL | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| EPElectronic Plating CO INC | Cicero | IL | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| EPEnchro Plating LTD | Melrose Park | IL | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| EFEngineered Fluid INC | Centralia | IL | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| FSFabrication Specialists INC | Alton | IL | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| FOFreeway of Rockford | Rockford | IL | Fabricated Metal Product Manufacturing332722 | — | ◐ LIKELY ACTIVE |
| FCFulton CORP | Fulton | IL | Fabricated Metal Product Manufacturing332116 | 100-499 | ◐ LIKELY ACTIVE |
| GAGears and Sprockets Headquarters INC | Broadview | IL | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| GAGe Aviation Systems LLC | Loves Park | IL | Fabricated Metal Product Manufacturing332911 | — | ◐ LIKELY ACTIVE |
| GMGeneral Machinery & Manufacturing CO | Chicago | IL | Fabricated Metal Product Manufacturing332119 | — | ▲ REPORTED CLOSED |
| GPGeneral Plating CO INC | Addison | IL | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| GSGeneral Surface Hardening | Chicago | IL | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| GSGilbert Spring Corporation | Chicago | IL | Fabricated Metal Product Manufacturing332613 | 20-99 | ◐ LIKELY ACTIVE |
| HIHennig, INC | Machesney Park | IL | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| HIHpz INC | Toledo | IL | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
| IMIcon Metalcraft, INC. | Wood Dale | IL | Fabricated Metal Product Manufacturing332111 | — | ◐ LIKELY ACTIVE |
| IPIllinois Pulley & Gear INC | Schaumburg | IL | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| ITImperial Trailer Mfg. & Sales, INC. | Olney | IL | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
| IEIms Engineered Products LLC | Des Plaines | IL | Fabricated Metal Product Manufacturing332322 | — | ▲ REPORTED CLOSED |
| IFIndustrial Finishing INC | Franklin Park | IL | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| IBItw Buildex- Roselle | Roselle | IL | Fabricated Metal Product Manufacturing332722 | 20-99 | ◐ LIKELY ACTIVE |
| JPJamco Products, INC. | South Beloit | IL | Fabricated Metal Product Manufacturing332999 | 100-499 | ◐ LIKELY ACTIVE |
| JCJett Cutting Service, INC. | Bedford Park | IL | Fabricated Metal Product Manufacturing332996 | 20-99 | ◐ LIKELY ACTIVE |
| JSJohn Sakash Company, INC. | Elmhurst | IL | Fabricated Metal Product Manufacturing332618 | — | ◐ LIKELY ACTIVE |
| KTKenmode Tool & Engineering | Algonquin | IL | Fabricated Metal Product Manufacturing332116 | — | ◐ LIKELY ACTIVE |
| KNKitagawa Northtech, INC. | Schaumburg | IL | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| LILdi Industries - Huntley | Huntley | IL | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| LIL&n Industries | Rushville | IL | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| LMLudlow Manufacturing Inc. | Waukegan | IL | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| MVMackinaw Valley Powder Coating | Mackinaw | IL | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| MTManor Tool & Mfg CO | Schiller Park | IL | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| MBMba Building Supplies, INC. | Libertyville | IL | Fabricated Metal Product Manufacturing332114 | 100-499 | ◐ LIKELY ACTIVE |
Mclaughlin Body CO | Rock Island | IL | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| MMMennie Machine CO | Mark | IL | Fabricated Metal Product Manufacturing332721 | 100-499 | ◐ LIKELY ACTIVE |
| MNMetalex North | Libertyville | IL | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| MAMetals and Services INC. | Addison | IL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| MHMexicali Hard Chrome | Addison | IL | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |