Aqua-aerobic Systems INC | Loves Park | 100–499 | ● ACTIVE |
Bergstrom INC | Rockford | 100–499 | ● ACTIVE |
| IMIngersoll Machine Tools INC | Rockford | 100–499 | ● ACTIVE |
Accelerated Machine Design & Engineering LLC | Rockford | — | ● ACTIVE |
Advanced Machine & Engineering CO | Rockford | 100–499 | ● ACTIVE |
Bourn & Koch, INC. | Rockford | 20–99 | ● ACTIVE |
Ford Tool & Machining INC | Loves Park | — | ● ACTIVE |
Forest City Gear Company | Roscoe | 100–499 | ● ACTIVE |
Tapco Cutting Tools INC | Loves Park | — | ● ACTIVE |
| WTWestran Thermal Processing, LLC | South Beloit | 20–99 | ● ACTIVE |
Danray Products LLC | Rockford | — | ● ACTIVE |
Jerhen Industries INC | Rockford | — | ● ACTIVE |
Obsidian Manufacturing Industries INC | Rockford | — | ● ACTIVE |
Pietro Carnaghi USA INC | Rockford | — | ● ACTIVE |
| ZCZenith Cutter INC | Loves Park | 20–99 | ◐ LIKELY ACTIVE |
| HPHmc Products LLC | Caledonia | 20–99 | ◐ LIKELY ACTIVE |
| TCTaylor Co- Division of Carrier Commercial Refrigeration INC | Rockton | — | ◐ LIKELY ACTIVE |
| CRConcentric Rockford INC | Rockford | — | ◇ UNVERIFIED |
| EIEcolab INC | Roscoe | — | ◇ UNVERIFIED |
| GCGleason Cutting Tools CORP | Loves Park | — | ◇ UNVERIFIED |
| MHMte Hydraulics, INC. | Rockford | — | ◇ UNVERIFIED |
| PHParker Hannifin/cylinder Division | Rockford | — | ◇ UNVERIFIED |
| BIBarnes International INC | Rockford | — | ◇ UNVERIFIED |
| PCPrintjet CORP | Machesney Park | — | ◇ UNVERIFIED |
| DADixon Automatic Tool INC | Rockford | 20–99 | ◐ LIKELY ACTIVE |
| ICIngersoll Cutting Tool Company | Rockford | 100–499 | ◐ LIKELY ACTIVE |
| KKomline-Barnes | Rockford | 100–499 | ◐ LIKELY ACTIVE |
| MAMartin Automatic CO | Rockford | 100–499 | ◐ LIKELY ACTIVE |
| WIWeldments INC | Rockford | — | ◐ LIKELY ACTIVE |
| BPBesly Products CORP | South Beloit | — | ◇ UNVERIFIED |
| DCDana Companies LLC | Roscoe | — | ◇ UNVERIFIED |
| DCDana Companies LLC | Roscoe | — | ◇ UNVERIFIED |
| DIDynacorp, INC | Rockford | — | ◇ UNVERIFIED |
| EWEvoqua Water Technologies LLC | Rockford | — | ◇ UNVERIFIED |
| ICIngersoll Cutting Tool CO Member of the Imc Group | Rockford | — | ◇ UNVERIFIED |
| MTMachine Tool Builders INC | Machesney Park | — | ◇ UNVERIFIED |
| PFPiranha Fabrication | Rockford | — | ◇ UNVERIFIED |
| QDQuantum Design INC | Caledonia | — | ◇ UNVERIFIED |
| RCRegal Cutting Tools Div Yg-1 CO LTD | South Beloit | — | ◇ UNVERIFIED |
| SISuntec Industries INC | Rockford | — | ◇ UNVERIFIED |
| TMTrd Manufacturing INC | Machesney Park | — | ◇ UNVERIFIED |
| TPTy Precision Automatics | Rockford | — | ◇ UNVERIFIED |
| CICaldwell, Inc. - Distribution | Rockford | 1–19 | ◐ LIKELY ACTIVE |
| DLDanfoss LLC | Loves Park | 20–99 | ◐ LIKELY ACTIVE |
| DLDanfoss LLC Loves Park, IL | Loves Park | 100–499 | ◐ LIKELY ACTIVE |
| EMEcolab Manufacturing Roscoe | Roscoe | 100–499 | ◐ LIKELY ACTIVE |
| EPEmerson Professional Tools - Rockford CTSC | Rockford | 20–99 | ◐ LIKELY ACTIVE |
| EPEmerson Professional Tools - Rockford TEC | Rockford | 20–99 | ◐ LIKELY ACTIVE |
| GCGreenberg Casework Company | South Beloit | 20–99 | ◐ LIKELY ACTIVE |
| HSHorsburgh & Scott- Roscoe | Roscoe | 1–19 | ◐ LIKELY ACTIVE |