 Precision Dose INC | South Beloit | 100–499 | ● ACTIVE |
 Prochem Incorporated International | Rockford | — | ● ACTIVE |
 Aeromotive Research and Defense Group, INC. | Rockford | — | ● ACTIVE |
 Clayens Rockford, LLC | Machesney Park | — | ● ACTIVE |
| SWSherwin Williams CO the | Rockford | — | ◐ LIKELY ACTIVE |
| FIFiberglass Innovations | Rockford | — | ◇ UNVERIFIED |
| RORust Oleum | Rockford | — | ◇ UNVERIFIED |
| SWSherwin Williams CO the | Rockford | — | ◇ UNVERIFIED |
| TCTestor CORP | Rockford | — | ◇ UNVERIFIED |
| ALAir Liquide Advanced Technologies US LLC | Rockford | — | ◐ LIKELY ACTIVE |
| PPPci Pharmaceutical Services | Rockford | — | ◐ LIKELY ACTIVE |
| PBPierce Biotechnology INC | Rockford | — | ◐ LIKELY ACTIVE |
| SNStandox North America | Rockford | — | ◐ LIKELY ACTIVE |
| AAndersonbrecon | Rockford | — | ◇ UNVERIFIED |
| ACArch Chemicals Specialty Products, INC. | Seward | — | ◇ UNVERIFIED |
| CCCustom Compounding Services LLC | Rockford | — | ◇ UNVERIFIED |
| EIEndpoint INC | Rockford | — | ◇ UNVERIFIED |
| FFFree Flow Rockford LLC | Machesney Park | — | ◇ UNVERIFIED |
| PLPci Logistics | Rockford | — | ◇ UNVERIFIED |
| RIRockford Industrial Distribution Ctr | Rockford | — | ◇ UNVERIFIED |
| TCTioga Coatings CORP | Rockford | — | ◇ UNVERIFIED |
| FPFernway Prairie State LLC | Rockford | 1–19 | ◐ LIKELY ACTIVE |
 Life Technologies Corporation | Rockford | 100–499 | ◐ LIKELY ACTIVE |
| LALobo Alliance Solutions LLC | Winnebago | — | ◐ LIKELY ACTIVE |
| LPLoves Park, IL | Loves Park | 20–99 | ◐ LIKELY ACTIVE |
| SISustainable Innovations INC | Rockford | — | ◐ LIKELY ACTIVE |
| UIUSA IL Rockford Nelson Boulevard Plant | Rockford | 20–99 | ◐ LIKELY ACTIVE |
| UIUSA IL Rockford Technology Drive Plant | Rockford | 20–99 | ◐ LIKELY ACTIVE |
| ACAGI Corporation | Loves Park | — | ◇ UNVERIFIED |
| ABAmerican Bentonite International, INC. | Rockford | — | ◇ UNVERIFIED |
| ABAmerican Bentonite International, INC. | Rockford | — | ◇ UNVERIFIED |
| CCColorlab Cosmetics, INC. | Rockford | — | ◇ UNVERIFIED |
| FFFree Flow Rockford LLC | Machesney Park | — | ◇ UNVERIFIED |
| NLNova-kem LLC | Seward | — | ◇ UNVERIFIED |
| PRPrem Reliance INC | Rockford | — | ◇ UNVERIFIED |
| WCWinnebago County Ethanol Plant | Rockford | — | ◇ UNVERIFIED |
| WRWinnebago Rng Plant | Rockford | — | ◇ UNVERIFIED |
