| GLGreen Land LLC | Batavia | IL | Computer and Electronic Product Manufacturing334512 | — | ◇ UNVERIFIED |
| GCGte Communication Systems CORP | Genoa | IL | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| HCHarris CORP | Quincy | IL | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| HIHomaco INC | Chicago | IL | Computer and Electronic Product Manufacturing334210 | — | ◇ UNVERIFIED |
| HIHoneywell International Incorporated Plant 6 | Freeport | IL | Computer and Electronic Product Manufacturing334000 | — | ◇ UNVERIFIED |
| ISIllinois Superconductor CORP | Mount Prospect | IL | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| ITIllinois Tool Works Chronomatic | Chicago | IL | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| IUImco US | Frankfort | IL | Computer and Electronic Product Manufacturing334418 | — | ◇ UNVERIFIED |
| KTKeysight Technologies, INC. | Arlington Heights | IL | Computer and Electronic Product Manufacturing334515 | — | ◇ UNVERIFIED |
| LSLamination Specialties Corporation | Chicago | IL | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| LMLighthouse Microwave | Wenona | IL | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| MEMarvel Electric Corporation | Schiller Park | IL | Computer and Electronic Product Manufacturing334416 | — | ◇ UNVERIFIED |
| MGMaster Gauge CO. | Chicago | IL | Computer and Electronic Product Manufacturing334513 | — | ◇ UNVERIFIED |
| MMMcdonnell & Miller Itt | Chicago | IL | Machinery Manufacturing333414 | — | ◇ UNVERIFIED |
| MIMFXG, Inc. | Batavia | IL | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| MIMotorola INC | Libertyville | IL | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| MMMsl Midwest Operations | Mt Prospect | IL | Computer and Electronic Product Manufacturing334210 | — | ◇ UNVERIFIED |
| NINashy, Inc. | Rolling Meadows | IL | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| NPNat'l Precision Circuits & Electronics | Elmhurst | IL | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems CORP | Arlington Heights | IL | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems CORP | Palatine | IL | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| NENsi Electrical | Wheeling | IL | Computer and Electronic Product Manufacturing334417 | — | ◇ UNVERIFIED |
| NSNu-way Speaker Products INC | Antioch | IL | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| OSOccupational Safety & Health Administration | Bolingbrook | IL | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
 Olympic Controls Corp. | Elgin | IL | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| OLOrimtech LTD | Buffalo Grove | IL | Computer and Electronic Product Manufacturing334517 | — | ◇ UNVERIFIED |
| PIPhusion, INC. | Chicago | IL | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| PTPmj Technology INC | Arlington Heights | IL | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| PGPowerVolt Group Inc. | Addison | IL | Computer and Electronic Product Manufacturing334416 | — | ◇ UNVERIFIED |
| PIProcomm, INC. of Hoopeston, Illinois | Onarga | IL | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
 Rockwell Automation | Elmhurst | IL | Computer and Electronic Product Manufacturing334519 | — | ◇ UNVERIFIED |
| SMSchleifering Medical Systems | Elgin | IL | Computer and Electronic Product Manufacturing334510 | — | ◇ UNVERIFIED |
| SESchott Elecpac | Cary | IL | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
 Schweitzer Engineering Laboratories INC - Lake Zurich Facili | Lake Zurich | IL | Computer and Electronic Product Manufacturing334515 | — | ◇ UNVERIFIED |
| SMSeco Mfg CO INC | Mound City | IL | Computer and Electronic Product Manufacturing334519 | — | ◇ UNVERIFIED |
| SISensaphonics, Inc. | Chicago | IL | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| TSTavo Sleep, LLC | Brookfield | IL | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| TPTech Properties, LLC | Elgin | IL | Computer and Electronic Product Manufacturing334118 | — | ◇ UNVERIFIED |
| TOTellabs Operations INC | Bolingbrook | IL | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| TTToryon Technologies INC | Elgin | IL | Computer and Electronic Product Manufacturing334418 | — | ◇ UNVERIFIED |
| TITricon Industries INC | Downers Grove | IL | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| TITri-onics INC | Highland | IL | Computer and Electronic Product Manufacturing334418 | — | ◇ UNVERIFIED |
| TITsc International, INC. | Toledo | IL | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| UIUnited Innovative Solutions, Corp | Elk Grove Village | IL | Computer and Electronic Product Manufacturing334418 | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Polo | IL | Computer and Electronic Product Manufacturing334416 | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Loves Park | IL | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| VIVaisala, INC | Paw Paw | IL | Computer and Electronic Product Manufacturing334519 | — | ◇ UNVERIFIED |
| VLVokyl LLC | Collinsville | IL | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| ZLZacuto LLC | Chicago | IL | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| ZLZacuto LLC | Chicago | IL | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
