| GOGroup O Supply Chain Solutions | Milan | — | ◇ UNVERIFIED |
| HMHarris Marcus Furniture | Chicago | — | ◇ UNVERIFIED |
 Ideal Industries INC | Sycamore | — | ◇ UNVERIFIED |
| IIIdeal Industries INC | Sycamore | — | ◇ UNVERIFIED |
| ICIllinois Central College - North Campus | Peoria | — | ◇ UNVERIFIED |
| IEIllinois Electric Works | Granite City | — | ◇ UNVERIFIED |
| ITIllinois Tool Works INC | Buffalo Grove | — | ◇ UNVERIFIED |
| IMIndustrial Motor Service | Montgomery | — | ◇ UNVERIFIED |
| IEInglot Electronics CORP | Chicago | — | ◇ UNVERIFIED |
| IEInman Electric CO | Lasalle | — | ◇ UNVERIFIED |
| IPIntegrated Power Services | Thornton | — | ◇ UNVERIFIED |
| ISItw Switches | Harwood Heights | — | ◇ UNVERIFIED |
| JCJoslyn Corporation - E a D | Franklin Park | — | ◇ UNVERIFIED |
| JMJoslyn Mfg - Electrical Apparatus Div | Chicago | — | ◇ UNVERIFIED |
| KEKinney Electrical Mfg CO | Elgin | — | ◇ UNVERIFIED |
| LJL & J Technoligies | Hillside | — | ◇ UNVERIFIED |
| MCMachinery Components INC | West Chicago | — | ◇ UNVERIFIED |
| MIMatsushita Industrial Equipment CO (miec | Elmhurst | — | ◇ UNVERIFIED |
| MHMaytag Herrin Laundry Products | Herrin | — | ◇ UNVERIFIED |
| MIMicron Industries CORP | Sterling | — | ◇ UNVERIFIED |
| MMMidwest Motor Specialists | Morris | — | ◇ UNVERIFIED |
| MLMolex LLC | Monee | — | ◇ UNVERIFIED |
| MVMount Vernon Neon | Mount Vernon | — | ◇ UNVERIFIED |
| OCOneac CORP | Libertyville | — | ◇ UNVERIFIED |
| OSOsram Sylvania Products INC | Lake Zurich | — | ◇ UNVERIFIED |
| PSPacific Scientific Motion Control INC | Rockford | — | ◇ UNVERIFIED |
| PCPanduit CORP | Burr Ridge | — | ◇ UNVERIFIED |
| PCPanduit Corp-network System Div | Orland Park | — | ◇ UNVERIFIED |
| PCPanduit CORP - Terminals Division | New Lenox | — | ◇ UNVERIFIED |
| PIPohlers Industrial Electric Service | Joliet | — | ◇ UNVERIFIED |
| PEPowell Electrical Systems INC | Northlake | — | ◇ UNVERIFIED |
| RERichards Electric Motor CO | Quincy | — | ◇ UNVERIFIED |
| RERockford Electric Equipment CO | Rockford | — | ◇ UNVERIFIED |
| RIRock Island Electric Motor Repair INC | Rock Island | — | ◇ UNVERIFIED |
| RCRoper Corporation - Kankakee | Kankakee | — | ◇ UNVERIFIED |
| RHRoyal Haeger Lamp CO West | Macomb | — | ◇ UNVERIFIED |
| SESchumacher Electric CORP | Hoopeston | — | ◇ UNVERIFIED |
| SLShape LLC | Addison | — | ◇ UNVERIFIED |
| SFSiemans - Furnas Controls | West Chicago | — | ◇ UNVERIFIED |
| SISimplex INC | Springfield | — | ◇ UNVERIFIED |
| SCSouthwire CO | Waukegan | — | ◇ UNVERIFIED |
| TMTransformer Mfg INC | Norridge | — | ◇ UNVERIFIED |
| WPWeber-stephen Products CO Palatine Building 200 | Palatine | — | ◇ UNVERIFIED |
| WEWeg Electric CORP | Mchenry | — | ◇ UNVERIFIED |
| WWWoodstock Wire Works INC | Woodstock | — | ◇ UNVERIFIED |
| WCWoodward Controls INC | Niles | — | ◇ UNVERIFIED |
| AIAltak, Inc. | Saint Charles | 20–99 | ◐ LIKELY ACTIVE |
| AIAltorfer Inc. - Bartonville, IL - 6315 W Fauber Road | Bartonville | 20–99 | ◐ LIKELY ACTIVE |
| AGAmerican Graphene Partners LTD. | Shelbyville | — | ◐ LIKELY ACTIVE |
| BCBald Cypress Advisors LLC - Simplex System Controls | Elmhurst | 20–99 | ◐ LIKELY ACTIVE |
