| MCMishawaka Concrete & Asphalt Recycling | Mccook | IL | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
 Mississippi Lime CO | Prairie Du Rocher | IL | Nonmetallic Mineral Product Manufacturing327410 | — | ◇ UNVERIFIED |
| MCMoline Consumers CO - R/m Concrete Div | Moline | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MPMt Pulaski Products LLC | Mount Pulaski | IL | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| NRNaperville Ready Mix INC | Naperville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| NBNarvick Brothers Lumber CO INC | Yorkville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| NBNarvick Brothers Lumber CO INC | Morris | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| NBNarvick Brothers Lumber CO INC | Channahon | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| NINorthern Il Wilbert Vault CO INC | Belvidere | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| NMNorthern Materials | Lakewood | IL | Nonmetallic Mineral Product Manufacturing327410 | — | ◇ UNVERIFIED |
| NBNorthfield Block CO | Channahon | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| NBNorthfield Block CO | Joliet | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| NBNorthfield Block Company | Elgin | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| NBNorthfield Block INC | Romeoville | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| NMNorthfield Mundelein Plant | Mundelein | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| NINorthwest Illinois Construction CO | Rock Falls | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| NCNorthwind Concrete Products CO | Posen | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| NCNorthwind Concrete Products CO | South Beloit | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| OMOremus Material LLC | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OBOzinga Bros INC | Joliet | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OCOzinga Concrete Products - Hampshire | Hampshire | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OCOzinga Concrete Products Huntley | Huntley | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Elgin | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Monee | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OROzinga Ready Mix | Chicago Heights | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OROzinga Ready Mix | Naperville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OROzinga Ready Mix - 103rd St Plant | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OROzinga Ready Mix Concrete INC | Aurora | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OROzinga Ready Mix Concrete INC | Calumet Park | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OROzinga Ready Mix Concrete INC | Carol Stream | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete - Monee | Monee | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PPaschen-newberg-foster | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PRPaxton Ready Mix INC | Paxton | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PCPbm Concrete INC | Rochelle | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PGPeltier Glass Site | Ottawa | IL | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| PMPerformance Minerals CORP | Chicago | IL | Nonmetallic Mineral Product Manufacturing327420 | — | ◇ UNVERIFIED |
| PIPermacor INC | Oak Lawn | IL | Nonmetallic Mineral Product Manufacturing327110 | — | ◇ UNVERIFIED |
| PCPlote Construction | North Aurora | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PCPlote Construction INC | West Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PCPlote Construction INC | Waukegan | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PCPlote Construction INC | Hoffman Estates | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PCPlote Construction INC | East Dundee | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PRPoggenpohl Redi-mix | Taylorville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| 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 | Naperville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PMPrairie Material Sales INC | Bolingbrook | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PMPrairie Material Sales - Plant 2 | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
