| MHMte Hydraulics, INC. | Rockford, IL | Machinery Manufacturing333996 | — | ◇ UNVERIFIED |
| PHParker Hannifin/cylinder Division | Rockford, IL | Machinery Manufacturing333995 | — | ◇ UNVERIFIED |
| RFRocknel Fastener INC | Rockford, IL | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| RORust Oleum | Rockford, IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| SWSherwin Williams CO the | Rockford, IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| TCTestor CORP | Rockford, IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| TPTpg Pressure INC | South Beloit, IL | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| YIYoungberg Industries INC. | Belvidere, IL | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
Evergreen Warehouse INC | Rockford, IL | Fabricated Metal Product Manufacturing332721 | — | ◐ LIKELY ACTIVE |
| BIBarnes International INC | Rockford, IL | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| PCPrintjet CORP | Machesney Park, IL | Machinery Manufacturing333993 | — | ◇ UNVERIFIED |
| APAdapt Plastics, INC. | Loves Park, IL | Plastics and Rubber Products Manufacturing326199 | — | ◐ LIKELY ACTIVE |
American Aluminum Extrusion HQ (Roscoe IL) | Roscoe, IL | Primary Metal Manufacturing331316 | 100–499 | ◐ LIKELY ACTIVE |
| BIBehr Iron & Metal | Rockford, IL | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| CLCamcar LLC | Belvidere, IL | Fabricated Metal Product Manufacturing332722 | — | ◐ LIKELY ACTIVE |
| CMCorrugated Metals, INC. | Belvidere, IL | Fabricated Metal Product Manufacturing332114 | 20–99 | ◐ LIKELY ACTIVE |
| DFDean Foods Co.-belvidere Ice Cream Plt. | Belvidere, IL | Food Manufacturing311520 | — | ◐ LIKELY ACTIVE |
| DADixon Automatic Tool INC | Rockford, IL | Machinery Manufacturing333249 | 20–99 | ◐ LIKELY ACTIVE |
| EHEaton Hydraulics | Machesney Park, IL | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| EPEickman's Processing Company, INC. | Seward, IL | Food Manufacturing311611 | — | ◐ LIKELY ACTIVE |
| FOFreeway of Rockford | Rockford, IL | Fabricated Metal Product Manufacturing332722 | — | ◐ LIKELY ACTIVE |
| GAGe Aviation Systems LLC | Loves Park, IL | Fabricated Metal Product Manufacturing332911 | — | ◐ LIKELY ACTIVE |
General Mills - Belvidere, IL | Belvidere, IL | Food Manufacturing311230 | 500+ | ◐ LIKELY ACTIVE |
| HSHamilton Sundstrand Corporation | Rockford, IL | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| HSHamilton Sundstrand Corporation | Rockford, IL | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| HIHennig, INC | Machesney Park, IL | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| ICIngersoll Cutting Tool Company | Rockford, IL | Machinery Manufacturing333515 | 100–499 | ◐ LIKELY ACTIVE |
| JPJamco Products, INC. | South Beloit, IL | Fabricated Metal Product Manufacturing332999 | 100–499 | ◐ LIKELY ACTIVE |
| KKomline-Barnes | Rockford, IL | Machinery Manufacturing333999 | 100–499 | ◐ LIKELY ACTIVE |
| LRLubricants Rockford | Rockford, IL | Petroleum and Coal Products Manufacturing324191 | 1–19 | ◐ LIKELY ACTIVE |
| MEMagna Exteriors Belvidere (2) | Belvidere, IL | Transportation Equipment Manufacturing336390 | 20–99 | ◐ LIKELY ACTIVE |
| MAMartin Automatic CO | Rockford, IL | Machinery Manufacturing333244 | 100–499 | ◐ LIKELY ACTIVE |
| MCMid-States Concrete Industries | South Beloit, IL | Nonmetallic Mineral Product Manufacturing327390 | 100–499 | ◐ LIKELY ACTIVE |
| PIPhelps Industries, LLC | Rockford, IL | Food Manufacturing311111 | 20–99 | ◐ LIKELY ACTIVE |
| PSProgressive Steel Treating, INC | Loves Park, IL | Fabricated Metal Product Manufacturing332618 | — | ◐ LIKELY ACTIVE |
| RARockford Acquisition CO LLC Dba Rockford Specialties | Loves Park, IL | Fabricated Metal Product Manufacturing332618 | — | ◐ LIKELY ACTIVE |
| RFRockford Fastener, INC. | Rockford, IL | Fabricated Metal Product Manufacturing332722 | 20–99 | ◐ LIKELY ACTIVE |
| RHRockford Heat Treaters INC | Rockford, IL | Fabricated Metal Product Manufacturing332811 | 20–99 | ◐ LIKELY ACTIVE |
| RPRockford Powertrain INC | Loves Park, IL | Transportation Equipment Manufacturing336350 | — | ◐ LIKELY ACTIVE |
| RSRockford Silk Screen | Rockford, IL | Printing and Related Support Activities323113 | — | ◐ LIKELY ACTIVE |
| RSRockford Specialties Company | Loves Park, IL | Primary Metal Manufacturing331420 | 20–99 | ◐ LIKELY ACTIVE |
| SSSafeway Services | Rockford, IL | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| SPSlidematic Precision Components | Rockford, IL | Fabricated Metal Product Manufacturing332722 | 100–499 | ◐ LIKELY ACTIVE |
| SFStateline Foundries Inc | Roscoe, IL | Primary Metal Manufacturing331511 | 20–99 | ◐ LIKELY ACTIVE |
| SDStellantis Dba Fca US LLC - Belvidere Assembly Plant | Belvidere, IL | Transportation Equipment Manufacturing336110 | — | ◐ LIKELY ACTIVE |
| SMSwebco Mfg INC | Machesney Park, IL | Fabricated Metal Product Manufacturing332721 | 20–99 | ◐ LIKELY ACTIVE |
| TITanner Industries INC | Belvidere, IL | Miscellaneous Manufacturing339999 | — | ◐ LIKELY ACTIVE |
| WCWilliam Charles Construction | Loves Park, IL | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| WIWoodward INC | Loves Park, IL | Nonmetallic Mineral Product Manufacturing327410 | — | ◐ LIKELY ACTIVE |
| WIWoodward INC | Rockford, IL | Fabricated Metal Product Manufacturing332912 | — | ◐ LIKELY ACTIVE |