| CRCardinal Red-e-mix | East Moline | — | ◇ UNVERIFIED |
| CRCardinal Red-e-mix CO | Carbon Cliff | — | ◇ UNVERIFIED |
| CCCarus Chemical CO | Ottawa | — | ◇ UNVERIFIED |
| CBChampaign Builders Supply CO | Champaign | — | ◇ UNVERIFIED |
| CFChicago Finished Metals INC | Bridgeview | — | ◇ UNVERIFIED |
| CSConcrete Specialties CO | Franklin Park | — | ◇ UNVERIFIED |
| CSConcrete Specialties CO Hazel Crest | Markham | — | ◇ UNVERIFIED |
| CSConcrete Supply LLC | Alorton | — | ◇ UNVERIFIED |
| CSConcrete Supply LLC | Madison | — | ◇ UNVERIFIED |
| CSConcrete Supply LLC | Godfrey | — | ◇ UNVERIFIED |
| CSConcrete Supply LLC | Roxana | — | ◇ UNVERIFIED |
| CSConcrete Supply LLC | Roxana | — | ◇ UNVERIFIED |
| CCContractors Concrete INC | Pana | — | ◇ UNVERIFIED |
| CCContractors Concrete INC | Tolono | — | ◇ UNVERIFIED |
| CCContractors Concrete INC | Effingham | — | ◇ UNVERIFIED |
| CCContractors Concrete INC | Shelbyville | — | ◇ UNVERIFIED |
| CCCornick Concrete Products CO | Pekin | — | ◇ UNVERIFIED |
| CMCounty Materials CORP | Springfield | — | ◇ UNVERIFIED |
| CPCounty Prestress LLC | Salem | — | ◇ UNVERIFIED |
| CPCounty Prestress LLC | Champaign | — | ◇ UNVERIFIED |
| CCovia | Ottawa | — | ◇ UNVERIFIED |
| CMCowhey Materials and Fuel | Chicago | — | ◇ UNVERIFIED |
| CCCraft Concrete Products INC | Cary | — | ◇ UNVERIFIED |
| CCrush-crete | Addison | — | ◇ UNVERIFIED |
| CRCurry Ready Mix INC | Pawnee | — | ◇ UNVERIFIED |
| CRCurry Ready Mix of Carlinville INC | Staunton | — | ◇ UNVERIFIED |
| CRCurry Ready Mix of Carlinville INC | Raymond | — | ◇ UNVERIFIED |
| DCDarnall Concrete Products CO | Normal | — | ◇ UNVERIFIED |
| DCDecatur Construction Services INC | Decatur | — | ◇ UNVERIFIED |
| DCDicicco Concrete Products CO | Chicago Heights | — | ◇ UNVERIFIED |
| DIDoll's INC | Olney | — | ◇ UNVERIFIED |
| DPDukane Precast CO | Naperville | — | ◇ UNVERIFIED |
| DPDukane Precast INC | Plainfield | — | ◇ UNVERIFIED |
| EGEagle Grinding Wheel CORP | Chicago | — | ◇ UNVERIFIED |
| EIEastern Illinois Precast,inc. | Charleston | — | ◇ UNVERIFIED |
| EREdwards Ready Mix | Geneseo | — | ◇ UNVERIFIED |
| ECElmhurst Chicago Stone | Elgin | — | ◇ UNVERIFIED |
| ECElmhurst Chicago Stone CO | Elmhurst | — | ◇ UNVERIFIED |
| EBElston Block Plant | Chicago | — | ◇ UNVERIFIED |
| EEnnis-flint | Niles | — | ◇ UNVERIFIED |
| ESEt Stimonds Construction CO | Utica | — | ◇ UNVERIFIED |
| FCFayette County Concrete INC | Vandalia | — | ◇ UNVERIFIED |
 Fives Landis CORP | South Beloit | — | ◇ UNVERIFIED |
| FRForrest Redi-mix Inc/gilman | Gilman | — | ◇ UNVERIFIED |
| FRFox Ridge Stone CO | Oswego | — | ◇ UNVERIFIED |
| GCGalassi Cut Stone | Worth | — | ◇ UNVERIFIED |
| GCGalva Concrete | Galva | — | ◇ UNVERIFIED |
| GCGanna Construction INC | Bartlett | — | ◇ UNVERIFIED |
| GEGayton Enterprises LLC | New Lenox | — | ◇ UNVERIFIED |
| GCGem City Concrete LLC | Quincy | — | ◇ UNVERIFIED |
