| ALAisin Light Metals LLC | Marion | 100–499 | ◐ LIKELY ACTIVE |
| AIAndersons INC the - Danville Rail | Danville | — | ◐ LIKELY ACTIVE |
| ASA. Stucki dba Wheelworx | Pekin | 20–99 | ◐ LIKELY ACTIVE |
| CRCalumet River Fleeting - Chicago Dry Dock | Chicago | 1–19 | ◐ LIKELY ACTIVE |
| DMDanville Metal Stamping 17 oakwood Ave | Danville | 100–499 | ◐ LIKELY ACTIVE |
| DIDynomax, Inc. | Wheeling | 100–499 | ◐ LIKELY ACTIVE |
| FMFargo Manufacturing CO | Franklin Park | 1–19 | ◐ LIKELY ACTIVE |
| FCFlex-N-Gate Chicago | Chicago | 500+ | ◐ LIKELY ACTIVE |
| GAGe Aviation Systems LLC | Loves Park | — | ◐ LIKELY ACTIVE |
| HSHamilton Sundstrand Corporation | Rockford | — | ◐ LIKELY ACTIVE |
| HSHamilton Sundstrand Corporation | Rockford | — | ◐ LIKELY ACTIVE |
| JCJnr Custo-matic Screw, INC. | Glendale Heights | 20–99 | ◐ LIKELY ACTIVE |
| KMKnapheide Manufacturing 6th & State | Quincy | 20–99 | ◐ LIKELY ACTIVE |
| KMKnapheide Manufacturing CO | Quincy | — | ◐ LIKELY ACTIVE |
| KTKnapheide Truck Equipment CO | Quincy | — | ◐ LIKELY ACTIVE |
| MEMagna Exteriors Belvidere (2) | Belvidere | 20–99 | ◐ LIKELY ACTIVE |
| MBMartin Barkey Racing Products (mbrp Ltd) | Huntsville, Ontario, Ca | — | ◐ LIKELY ACTIVE |
| NMNational Maintenance & Repair INC | Hartford | — | ◐ LIKELY ACTIVE |
| PDPrecision Dynamics LCC | Machesney Park | 20–99 | ◐ LIKELY ACTIVE |
| PBPrikos & Becker | Skokie | 20–99 | ◐ LIKELY ACTIVE |
| PMPrincipal Manufacturing Corporation | Braodview | 100–499 | ◐ LIKELY ACTIVE |
| RMRandall Manufacturing LLC | Elmhurst | 20–99 | ◐ LIKELY ACTIVE |
| RCRicon CORP | Buffalo Grove | 20–99 | ◐ LIKELY ACTIVE |
| RARivian Automotive | Normal | — | ◐ LIKELY ACTIVE |
| RARivian Automotive LLC | Normal | — | ◐ LIKELY ACTIVE |
| SSSchaumburg Specialties | Schaumburg | 20–99 | ◐ LIKELY ACTIVE |
| SCSteiner CORP. | Chicago | 20–99 | ◐ LIKELY ACTIVE |
| SDStellantis Dba Fca US LLC - Belvidere Assembly Plant | Belvidere | — | ◐ LIKELY ACTIVE |
| TDthyssenkrupp Dynamic Components Danville, LLC. | Danville | 100–499 | ◐ LIKELY ACTIVE |
| ZSZf Services LLC | Vernon Hills | 100–499 | ◐ LIKELY ACTIVE |
| BCBoeing CO Bldg 850 & 858 | Mascoutah | — | ◐ LIKELY ACTIVE |
| BEBorg-warner Emissions/thermal Systems | Dixon | — | ◐ LIKELY ACTIVE |
| CCChevron Commercial, INC. | Highland | 20–99 | ◐ LIKELY ACTIVE |
| DMDynamic Manufacturing- Hillside 5 | Hillside | — | ◐ LIKELY ACTIVE |
| DMDynamic Manufacturing INC | Hillside | — | ◐ LIKELY ACTIVE |
| FSFreedman Seating Company | Chicago | 500+ | ◐ LIKELY ACTIVE |
| NMNational Maintenance and Repair | Hartford | — | ◐ LIKELY ACTIVE |
| NRNational Railway Equipment | Silvis | — | ◐ LIKELY ACTIVE |
| RARivian Automotive | Le Roy | — | ◐ LIKELY ACTIVE |
| TIThule INC. | Forest Park | — | ◐ LIKELY ACTIVE |
| ARAdm Rail Car Repair Facility | Decatur | — | ◇ UNVERIFIED |
| APAircraft Propeller Service LLC | Lake Zurich | — | ◇ UNVERIFIED |
| APAirtex Products | Fairfield | — | ◇ UNVERIFIED |
| APAirtex Products Division | Fairfield | — | ◇ UNVERIFIED |
| APAirtex Products INC | Fairfield | — | ◇ UNVERIFIED |
| AAAmerican Allied Rail | Washington | — | ◇ UNVERIFIED |
| AAApplied Acoustics Intl | Chicago Heights | — | ◇ UNVERIFIED |
| ATAutomotive Technology Systems | Lawrenceville | — | ◇ UNVERIFIED |
| BPBabbitrite Products CO | Peoria | — | ◇ UNVERIFIED |
| BNBloomington Normal Seating CO | Normal | — | ◇ UNVERIFIED |