| GBGalesburg Builders Supply CO | Galesburg | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GEGayton Enterprises | Saint Charles | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GGGeneva Glass Works, INC. | Geneva | IL | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| GFGeorge Ferber & Sons | Fairmount | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GRGibson Redi - Mix INC | Gibson City | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GMGlenn Mccann CO INC | Ransom | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GBGold Bond - Wak Plant | Waukegan | IL | Nonmetallic Mineral Product Manufacturing327420 | — | ◇ UNVERIFIED |
| GCGoreville Concrete INC | Goreville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GCGoreville Concrete Products INC | Vienna | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GCGp Concrete | Pontiac | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GCGraber Concrete Pipe Company | Bloomingdale | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| GBGrandioso Brick & Stone | Chicago | IL | Nonmetallic Mineral Product Manufacturing327121 | — | ◇ UNVERIFIED |
| GMGranite Marble Gallery | Mundelein | IL | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| GEGranit Expert, Inc. | Wheeling | IL | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| GRGranville Ready Mix | Granville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GDGreenlee Diamond Tool CO | Des Plaines | IL | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| GCGrexii CORP D/b/a Block Ready Mix Group | Silvis | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GAGrier Abrasive Operating LLC | South Holland | IL | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| GPGrier Products Inc. | South Holland | IL | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| GRGrundy Redi Mix CO | Coal City | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
 Hahn Ready Mix CO | Aledo | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHardin Ready Mix INC | Hardin | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HIHardroc INC. | Wheeling | IL | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| HKHarry Kuhn INC | Plainfield | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HCHarsco Corporation | Pawnee | IL | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| HCHarvest Custom Countertops | West Chicago | IL | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| HBHayward Baker | Gillespie | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HCHoward Concrete Pumping CO INC | Belleville | IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| IBIbc Block Mfg LLC | Champaign | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| ILIc Lights, LLC | Nokomis | IL | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix | Roseville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix CO INC | Stronghurst | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix CO INC | Dallas City | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix CO INC | Little York | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IRIllini Ready Mix INC | Carbondale | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IGIllinois Granite and Marble LTD. | Elk Grove Village | IL | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| IMIllinois Mining CORP | Romeoville | IL | Nonmetallic Mineral Product Manufacturing327410 | — | ◇ UNVERIFIED |
| IVIllinois Valley Paving CO | Jacksonville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IVIllinois Valley Paving CO | Monticello | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IVIllinois Valley Paving CO | Bloomington | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IVIllinois Valley Paving CO | Peoria | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| IVIllinois Valley Paving CO | Bloomington | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
 Indian Industries INC D/b/a US Weight | Olney | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ITInnovative Technology & Materials INC | Chicago | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| ICIpsen Ceramics | Pecatonica | IL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| IMIrving Materials INC | Lawrenceville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| JCJames Cape & Sons CO | Rochelle | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| JCJames Cape & Sons -illinois | Addison | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| JCJames Cape & Sons-illinois | Barrington | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| JCJ Curry Ready Mix of Rushville INC | Astoria | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
