| PRPoggenpohl Redi-mix | Morrisonville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PRPoint Ready Mix LLC | Hampshire | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PPPorcelain Products CO | Macomb | IL | Nonmetallic Mineral Product Manufacturing327110 | — | ◇ UNVERIFIED |
| PMPrairie Material Sales | Romeoville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PMPrairie Material Sales INC | Bolingbrook | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PMPrairie Material Sales INC | Naperville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PMPrairie Material Sales - Plant 2 | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PMPrairie Materials Sales-#3 | La Grange | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PMPrairie Materials Sales-plant 10 | Batavia | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PMPrairie Materials Sales-plt 4 | South Holland | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PBPresnell Bros INC | Coalton | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PEPrestress Engineering CO | Blackstone | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| PRPrinceton Redi-mix INC | Princeton | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| QCQuad County Ready Mix | Centralia | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| QCQuad County Ready Mix | Carlyle | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| QCQuad County Ready Mix | Nashville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| QRQuad-county Ready Mix | Okawville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| QRQuality Ready Mix Concrete CO | Sterling | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| QCQuikrete - Chicago, Il Plant | Elburn | IL | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| QRQuincy Ready Mix INC | Quincy | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRanger Redi-mix | Woodstock | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RMReady Mix Solutions LLC | Anna | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RERed E Mix LLC | Litchfield | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RERed E Mix LLC | Jerseyville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RCRegal China CORP | Antioch | IL | Nonmetallic Mineral Product Manufacturing327112 | — | ◇ UNVERIFIED |
| RIRegal Industrial LLC | Pekin | IL | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| RRRegional Ready Mix LLC | Rochelle | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RVRex Vault & Mausoleum Service INC | Newton | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| RRRiver Redi-mix INC | Minonk | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RGRiverstone Group INC | Rock Island | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RCRoanoke Concrete Products CO | Bloomington | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RCRoanoke Concrete Products CO | Lincoln | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RCRoanoke Concrete Products CO | Petersburg | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RCRockford Cement Products CO | Rockford | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RCRock-tred CORP | Skokie | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| RRRoessler Ready Mix INC | Columbia | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRogers Ready Mix | Sparta | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRogers Ready-mix & Materials | Byron | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRogers Ready-mix & Materials INC | Rockford | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRogers Redi-mix | Ruma | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRoscoe Ready - Mix INC | Pecatonica | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RCRouland Concrete and Supplies | Jacksonville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SSSchrey Systems INC | Newton | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SASelee Advanced Ceramics | Gilberts | IL | Nonmetallic Mineral Product Manufacturing327110 | — | ◇ UNVERIFIED |
| SSSheridan Sand & Gravel | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SBSilver Bros INC | Hoopeston | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSouth Chicago Property Development | Chicago | IL | Nonmetallic Mineral Product Manufacturing327410 | — | ◇ UNVERIFIED |
| SOSpancrete of Illinois | Crystal Lake | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| SRSport Redi-mix LLC | Champaign | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SIStaleys Interstate Ready-mix Concrete | Peoria | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
