| UTUnited Technologies Automotive INC. | Newton | IL | Transportation Equipment Manufacturing336000 | — | ◇ UNVERIFIED |
| VAVista-pro Automotive LLC | Burr Ridge | IL | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| WCWehrli Custom Fabrication | Dekalb | IL | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| WGWest Grant Dev INC | Rockton | IL | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| WIWoodward INC. | Niles | IL | Transportation Equipment Manufacturing336413 | — | ◇ UNVERIFIED |
| XMXenia Mfg INC | Olney | IL | Transportation Equipment Manufacturing336321 | — | ◇ UNVERIFIED |
| ZLZf Lemforder | Chicago | IL | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| ZSZf Services North America | Vernon Hills | IL | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| 1R100 Rivian Motorway (Normal, Illinois) | Normal | IL | Transportation Equipment Manufacturing336112 | 500+ | ◐ LIKELY ACTIVE |
| 1J1990 Janice Ave. | Melrose Park | IL | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| 2U2701 United Lane | Elk Grove Village | IL | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| 8D801 Diesel Radiator Co. | Elk Grove Village | IL | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| ANAdient Normal | Normal | IL | Transportation Equipment Manufacturing336360 | 20-99 | ◐ LIKELY ACTIVE |
| ASAegis Station Infrastructure LLC | Chicago | IL | Transportation Equipment Manufacturing336414 | — | ◐ LIKELY ACTIVE |
| APAgnelo Pereira | Chicago | IL | Transportation Equipment Manufacturing336320 | — | ◐ LIKELY ACTIVE |
| AGAIRCRAFT GEAR CORPORATION - Plant 2 | Rockford | IL | Transportation Equipment Manufacturing336350 | 20-99 | ◐ LIKELY ACTIVE |
| AIAlorton IL Trackwork | Alorton | IL | Transportation Equipment Manufacturing336510 | 20-99 | ◐ LIKELY ACTIVE |
| APAMS Performance LLC | Batavia | IL | Transportation Equipment Manufacturing336310 | 20-99 | ◐ LIKELY ACTIVE |
| AMAMST Main Branch | University Park | IL | Transportation Equipment Manufacturing336212 | 100-499 | ◐ LIKELY ACTIVE |
| ASAntolin Southern Illinois, LLC (dba Antolin Nashville) | Nashville | IL | Transportation Equipment Manufacturing336360 | 100-499 | ◐ LIKELY ACTIVE |
| AAApplied Aeronautics LLC | Lake Bluff | IL | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| AArcola | Arcola | IL | Transportation Equipment Manufacturing336510 | 20-99 | ◐ LIKELY ACTIVE |
| ACAstronics Chicago | Chicago | IL | Transportation Equipment Manufacturing336411 | 1-19 | ◐ LIKELY ACTIVE |
| ALAstronics Lake Zurich | Lake Zurich | IL | Transportation Equipment Manufacturing336411 | 20-99 | ◐ LIKELY ACTIVE |
| AAAvio Aero Chicago IL | Bedford Park | IL | Transportation Equipment Manufacturing336413 | 100-499 | ◐ LIKELY ACTIVE |
| BDBorgWarner Dixon LLC | Dixon | IL | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| BPBrake Parts Inc. R & D | Mchenry | IL | Transportation Equipment Manufacturing336340 | 20-99 | ◐ LIKELY ACTIVE |
| BNBurgess Norton - Piston Pin Geneva | Geneva | IL | Transportation Equipment Manufacturing336310 | 100-499 | ◐ LIKELY ACTIVE |
| CChicago | Forest Park | IL | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| CAChicago Asmby | Chicago | IL | Transportation Equipment Manufacturing336111 | 500+ | ◐ LIKELY ACTIVE |
| COChicago - Oakbrook VM | Oak Brook | IL | Transportation Equipment Manufacturing336212 | 20-99 | ◐ LIKELY ACTIVE |
| CSChicago Stmp | Chicago Heights | IL | Transportation Equipment Manufacturing336370 | 500+ | ◐ LIKELY ACTIVE |
| CICIF Industries, Inc.-Staunton | Litchfield | IL | Transportation Equipment Manufacturing336212 | 20-99 | ◐ LIKELY ACTIVE |
| CMCorrigan Moving Systems | Hanover Park | IL | Transportation Equipment Manufacturing336212 | 1-19 | ◐ LIKELY ACTIVE |
| DEDac Engineered Products, LLC | Oswego | IL | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| DIDakkota Intergrated Sytems LLC | Chicago | IL | Transportation Equipment Manufacturing336111 | 100-499 | ◐ LIKELY ACTIVE |
| DIDana Incorporated | Lisle | IL | Transportation Equipment Manufacturing336350 | 1-19 | ◐ LIKELY ACTIVE |
| DIDanvers IL Trackwork | Danvers | IL | Transportation Equipment Manufacturing336510 | 1-19 | ◐ LIKELY ACTIVE |
| DMDynamic Manufacturing, Inc. | Melrose Park | IL | Transportation Equipment Manufacturing336350 | 20-99 | ◐ LIKELY ACTIVE |
| EFEagle Fabrication, LLC | Sauget | IL | Transportation Equipment Manufacturing336611 | 1-19 | ◐ LIKELY ACTIVE |
Eclipse Aerospace Inc ARR | Sugar Grove | IL | Transportation Equipment Manufacturing336411 | 1-19 | ◐ LIKELY ACTIVE |
| FNFlex N Gate Effingham | Effingham | IL | Transportation Equipment Manufacturing336390 | 500+ | ◐ LIKELY ACTIVE |
| FNFlex N Gate Plastics Danville | Danville | IL | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| FRFlex-N-Gate Rantoul LLC | Rantoul | IL | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| GRGalesburg Recycling | Galesburg | IL | Transportation Equipment Manufacturing336510 | 1-19 | ◐ LIKELY ACTIVE |
| GGGlobal Gear & Machining, LLC | Downer Grove | IL | Transportation Equipment Manufacturing336350 | 20-99 | ◐ LIKELY ACTIVE |
| HMHeadly Manufacturing Co. | Broadview | IL | Transportation Equipment Manufacturing336370 | 100-499 | ◐ LIKELY ACTIVE |
| HAHeligear Acquisition CO. | Chicago | IL | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
Henderson Products - Upfit Service Center Huntley | Huntley | IL | Transportation Equipment Manufacturing336211 | 20-99 | ◐ LIKELY ACTIVE |
| H1Hillside 1 | Hillside | IL | Transportation Equipment Manufacturing336350 | 500+ | ◐ LIKELY ACTIVE |