| SBShort Brothers Construction INC | Marion | — | ◇ UNVERIFIED |
| SPSopus Products | Roxana | — | ◇ UNVERIFIED |
| SISouthern Illinois Materials CO | Dodds | — | ◇ UNVERIFIED |
| SISouthern Illinois Stone CO | Buncombe | — | ◇ UNVERIFIED |
| SCSpringfield Coal CO | Waltonville | — | ◇ UNVERIFIED |
| SPStark Paving INC | Bloomington | — | ◇ UNVERIFIED |
| SHState Highway Construction | Taylorville | — | ◇ UNVERIFIED |
| SHState Highway Construction | Springfield | — | ◇ UNVERIFIED |
| SHState Highway Construction CORP | Lincoln | — | ◇ UNVERIFIED |
| SHState Highway Construction CORP | Payson | — | ◇ UNVERIFIED |
| SHState Highway Construction CORP INC | Assumption | — | ◇ UNVERIFIED |
| SHState Highway Construction CORP INC | Litchfield | — | ◇ UNVERIFIED |
| SHState Highway Construction CORP INC | Pana | — | ◇ UNVERIFIED |
| SGSuperior Graphite CO | Chicago | — | ◇ UNVERIFIED |
| TCTazewell County Asphalt CO INC | East Peoria | — | ◇ UNVERIFIED |
| TFTruman Flatt & Sons CO INC | Buckhart | — | ◇ UNVERIFIED |
| UAUnited Asphalt Supply | Canton | — | ◇ UNVERIFIED |
| UAUnited Asphalt Supply INC | Macomb | — | ◇ UNVERIFIED |
| WAWabash Asphalt CO INC | Barnhill | — | ◇ UNVERIFIED |
| WIWabash Independent Oil CO | Farina | — | ◇ UNVERIFIED |
| WCWilliam Charles Const CO LLC Materials Div | Rochelle | — | ◇ UNVERIFIED |
| WCWilliam Charles Const CO LLC Materials Div | Roscoe | — | ◇ UNVERIFIED |
| WCWilliam Charles Construction CO | Belvidere | — | ◇ UNVERIFIED |
| WCWilliam Charles Construction CO | Durand | — | ◇ UNVERIFIED |
| WMWl Miller CO | Mt Sterling | — | ◇ UNVERIFIED |
| WAWw Asphalt INC | Sterling | — | ◇ UNVERIFIED |
| CDChevron Danville REG | Danville | 20–99 | ◐ LIKELY ACTIVE |
| ICICP Chicago | Chicago | 20–99 | ◐ LIKELY ACTIVE |
| MPMega Petroleum LLC | Chicago | — | ▲ REPORTED CLOSED |
| P6Phillips 66 - Wood River Refinery | Roxana | 500+ | ◐ LIKELY ACTIVE |
| PRPlant, Road and Shop | Swansea | 20–99 | ◐ LIKELY ACTIVE |
| RCRain CII Carbon - Robinson | Robinson | 20–99 | ◐ LIKELY ACTIVE |
| SESunCoke Energy Granite City Operations | Granite City | 100–499 | ◐ LIKELY ACTIVE |
| ECEj Cady & CO | Wheeling | 1–19 | ◇ UNVERIFIED |
| EIEmulsions INC | Lawrenceville | 1–19 | ◇ UNVERIFIED |
| LCLeahy-Wolf Co. | Addison | 20–99 | ◇ UNVERIFIED |