| GCGlen-gery CORP | Marseilles | — | ◇ UNVERIFIED |
| GRGreat River Ready Mix | Hamilton | — | ◇ UNVERIFIED |
| GCGrundy CO Redi-mix | Plano | — | ◇ UNVERIFIED |
| GIGtc International | Chicago | — | ◇ UNVERIFIED |
| HIHaeger Industries INC | East Dundee | — | ◇ UNVERIFIED |
| HPHaeger Potteries of Macomb, INC | Macomb | — | ◇ UNVERIFIED |
| HRHahn Ready Mix CO | Aledo | — | ◇ UNVERIFIED |
| HCHamilton County Concrete INC | Mcleansboro | — | ◇ UNVERIFIED |
| HWHarry W Kuhn INC | West Chicago | — | ◇ UNVERIFIED |
| HAHayes Abrasives INC | Hillsboro | — | ◇ UNVERIFIED |
| HMHeckett Multiserv-plant 45 | Chicago | — | ◇ UNVERIFIED |
| HFHenry Frerk Sons INC | Chicago | — | ◇ UNVERIFIED |
| HNHenry Nelch & Son CO INC | Springfield | — | ◇ UNVERIFIED |
| HRHillsboro Ready Mix Div of Mid-illinois Concrete | Hillsboro | — | ◇ UNVERIFIED |
| HMHj Mohr & Sons CO | Oak Park | — | ◇ UNVERIFIED |
| IRIdeal Ready Mix CO INC | Elvaston | — | ◇ UNVERIFIED |
| IVIllinois Valley Paving CO | Elwin | — | ◇ UNVERIFIED |
| IIImi Illinois | Clinton | — | ◇ UNVERIFIED |
| IIImi Illinois, LLC | Tuscola | — | ◇ UNVERIFIED |
| ICInfo Corner Materials INC | Springfield | — | ◇ UNVERIFIED |
| IMIrving Materials INC | Mount Carmel | — | ◇ UNVERIFIED |
| JAJones and Son INC | Lawrenceville | — | ◇ UNVERIFIED |
| JMJust Mfg CO | Franklin Park | — | ◇ UNVERIFIED |
| KCKendall County Concrete Crushing INC | Bristol | — | ◇ UNVERIFIED |
| KCKendall County Concrete INC | Aurora | — | ◇ UNVERIFIED |
| KCK-five Construction INC | North Aurora | — | ◇ UNVERIFIED |
| KBKienstra Block & Brick LLC | Wood River | — | ◇ UNVERIFIED |
| LCLincolnland Concrete INC | New Berlin | — | ◇ UNVERIFIED |
| LCLincolnland Concrete INC | Springfield | — | ◇ UNVERIFIED |
| LSLone Star Industries INC | Oglesby | — | ◇ UNVERIFIED |
| LALotton Art Glass | Crete | — | ◇ UNVERIFIED |
| MDMad Dog Concrete LLC | Rock Island | — | ◇ UNVERIFIED |
| MMagneco | Addison | — | ◇ UNVERIFIED |
| MAMarathon Ashland Petroleum LLC | Robinson | — | ◇ UNVERIFIED |
| MGMertel Gravel CO | Peru | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Harvard | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Huntley | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Marengo | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Belvidere | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Mchenry | — | ◇ UNVERIFIED |
| MMMeyer Material CO | Northbrook | — | ◇ UNVERIFIED |
| MIMid Il Concrete INC Dba Clark County Ready Mix | Martinsville | — | ◇ UNVERIFIED |
| MIMid Illinois Concrete - Effingham Ready Mix | Effingham | — | ◇ UNVERIFIED |
| MCMid-illinois Concrete INC | Effingham | — | ◇ UNVERIFIED |
| MCMiller & CO | Seneca | — | ◇ UNVERIFIED |
| MRMillers Ready-mix LLC | South Chicago Heights | — | ◇ UNVERIFIED |
| MIMinnick Illinois LLC | Joliet | — | ◇ UNVERIFIED |
| MCMishawaka Concrete & Asphalt Recycling | Mccook | — | ◇ UNVERIFIED |
 Mississippi Lime CO | Prairie Du Rocher | — | ◇ UNVERIFIED |
| MCMoline Consumers CO - R/m Concrete Div | Moline | — | ◇ UNVERIFIED |
