| DCDrb Company | Snohomish | WA | — | ◇ UNVERIFIED |
 D-tek Manufacturing | San Jose | CA | — | ◇ UNVERIFIED |
| DPDukane Precast CO | Naperville | IL | — | ◇ UNVERIFIED |
| DADura Art Stone INC | Fontana | CA | — | ◇ UNVERIFIED |
| DBDz Block, INC. | Wildwood | FL | — | ◇ UNVERIFIED |
| DBDz Block Plant | The Villages | FL | — | ◇ UNVERIFIED |
| ETEastern Tank & Utility Services INC | Bluefield | WV | — | ◇ UNVERIFIED |
| EBEaston Block Supply | Florham Park | NJ | — | ◇ UNVERIFIED |
| EDE Dillon & Company-treatment Plant | Swords Creek | VA | — | ◇ UNVERIFIED |
| EBElston Block Plant | Chicago | IL | — | ◇ UNVERIFIED |
| ESElwood Staffing Services, INC. | Middletown | PA | — | ◇ UNVERIFIED |
| ESEmery Sapp and Sons INC | Hiwasse | AR | — | ◇ UNVERIFIED |
| EDEMK Development Group, LLC | New Philadelphia | OH | — | ◇ UNVERIFIED |
| EAEngineered Arresting Systems CORP | Logan Twp | NJ | — | ◇ UNVERIFIED |
| EPE P Henry CORP | New Jersey | NJ | — | ◇ UNVERIFIED |
| EPE P Henry Corporation | Parker Ford | PA | — | ◇ UNVERIFIED |
| EMErnest Maier INC. | Ocean City | MD | — | ◇ UNVERIFIED |
| EMEulls Manufacturing Company INC | Saint Michael | MN | — | ◇ UNVERIFIED |
| EBEvansville Block CO Dba Miller Block & Brick CO | Evansville | IN | — | ◇ UNVERIFIED |
| FBFay Block Materials, INC. | Fayetteville | NC | — | ◇ UNVERIFIED |
| FPFirebaugh Precast, INC. | Colorado Springs | CO | — | ◇ UNVERIFIED |
| FPFirerock Products, LLC | Fairfield | AL | — | ◇ UNVERIFIED |
| FBFlemington Block & Supply CO | Raritan Twp | NJ | — | ◇ UNVERIFIED |
| FRFlorida Rock Industries INC | Jacksonville | FL | — | ◇ UNVERIFIED |
| FFmyp2 | Fort Myers | FL | — | ◇ UNVERIFIED |
| FPForterra Pipe & Precast, LLC | Elgin | TX | — | ◇ UNVERIFIED |
| FRForterra Roof Tile INC | Fort Myers | FL | — | ◇ UNVERIFIED |
| FBFreeway Building Materials | Perris | CA | — | ◇ UNVERIFIED |
| GPGagne Precast Concrete Products, INC. | Veazie | ME | — | ◇ UNVERIFIED |
| GEGC Easter Corp | Floresville | TX | — | ◇ UNVERIFIED |
| GSGeneral Shale Brick, INC. | Memphis | TN | — | ◇ UNVERIFIED |
| GSGeneral Shale Brick, INC. Dba Tri-cities Block - Plant #58 | Piney Flats | TN | — | ◇ UNVERIFIED |
| GSGeneral Shale INC. | Colorado Springs | CO | — | ◇ UNVERIFIED |
| GCGenest Concrete | Biddeford | ME | — | ◇ UNVERIFIED |
| GMGeorgia Masonry Supply-macon | Macon | GA | — | ◇ UNVERIFIED |
| GMGeorgia Masonry Supply Montgomery | Montgomery | AL | — | ◇ UNVERIFIED |
| GGGlen Gery CORP Landmark Stone Products LLC | Cynthiana | KY | — | ◇ UNVERIFIED |
| GGGlen Gery Corporation | Summerville | PA | — | ◇ UNVERIFIED |
| GBGlenstone Block Co-glenstone Block CO | Springfield | MO | — | ◇ UNVERIFIED |
| GMGraymont Materials, INC. | Plattsburgh | NY | — | ◇ UNVERIFIED |
| GLGreat Lakes an Oldcastle Company | Sheffield | OH | — | ◇ UNVERIFIED |
 Great Lakes Concrete Products LLC | Hamburg | NY | — | ◇ UNVERIFIED |
| GLGreat Lakes Minerals LLC | Wurtland | KY | — | ◇ UNVERIFIED |
| HPHanover Prest Paving Brick Plt | Hanover | PA | — | ◇ UNVERIFIED |
| HPHanson Paver Products INC | Pompano Beach | FL | — | ◇ UNVERIFIED |
| HPHanson Pipe & Precast INC Hanover Block Plant | Ashland | VA | — | ◇ UNVERIFIED |
| HPHanson Pipe & Precast INC Petersburg Block Plant | Prince George | VA | — | ◇ UNVERIFIED |
| HIHarsco Infrastructure | Marion | OH | — | ◇ UNVERIFIED |
| HCH C Muddox | Ione | CA | — | ◇ UNVERIFIED |
| HCH C Muddox-sacramento | Sacramento | CA | — | ◇ UNVERIFIED |
| HWHead West INC | Compton | CA | — | ◇ UNVERIFIED |
| HCHenry Camosse and Son | Worcester | MA | — | ◇ UNVERIFIED |
| HWHickman Williams & Company | Etna | PA | — | ◇ UNVERIFIED |
| HRHolbrook Ready Mix INC. | Selma | AL | — | ◇ UNVERIFIED |
| HRHoover Ready Mix | Madison | TN | — | ◇ UNVERIFIED |
| HTHovey Tile Art | Mentone | CA | — | ◇ UNVERIFIED |
| HHudson-denton | Hudson | FL | — | ◇ UNVERIFIED |
| HCHydro Conduit, LLC Dba Rinker Materials | Miami | FL | — | ◇ UNVERIFIED |
| IBIbc Block Mfg LLC | Champaign | IL | — | ◇ UNVERIFIED |
| ICIdeal Concrete Block Company, INC. | Westford | MA | — | ◇ UNVERIFIED |
| IBInnovative Block Plant | La Feria | TX | — | ◇ UNVERIFIED |
| ITInnovative Technology & Materials INC | Chicago | IL | — | ◇ UNVERIFIED |
| ICInterlock Concrete Products, INC. | Jordan | MN | — | ◇ UNVERIFIED |
| JSJacksonsonville South Mfg | Jacksonville | FL | — | ◇ UNVERIFIED |
| JHJericho Holdings, LLC | Kinston | NC | — | ◇ UNVERIFIED |
| JCJerry's Concrete Pumping Service LLC | Lithia | FL | — | ◇ UNVERIFIED |
| JWJewell Waco Site | Waco | TX | — | ◇ UNVERIFIED |
| JGJ.f. Gillespie, INC. | Vineland | NJ | — | ◇ UNVERIFIED |
| JBJohns Building Supply CO. INC. | Cheshire | MA | — | ◇ UNVERIFIED |
| JCJohnson Concrete Co-eastern | Willow Springs | NC | — | ◇ UNVERIFIED |
| JCJohnson Concrete Company | Lexington | NC | — | ◇ UNVERIFIED |
| JCJohnson Concrete Company | Willow Spring | NC | — | ◇ UNVERIFIED |
| JSJoplin Stoneworks LLC | Duenweg | MO | — | ◇ UNVERIFIED |
| JMJoseph Mining CO | Mcdowell | KY | — | ◇ UNVERIFIED |
| JWJ. W. Kelso Company, INC. | Galveston | TX | — | ◇ UNVERIFIED |
| KCKasten Concrete Products | Cape Girardeau | MO | — | ◇ UNVERIFIED |
| KMKast Marble | Colorado Springs | CO | — | ◇ UNVERIFIED |
| KIKellystone, INC. | Lake Charles | LA | — | ◇ UNVERIFIED |
| KCKeystone Concrete Block and Supply Company, INC. | Scranton | PA | — | ◇ UNVERIFIED |
| KCKeystone Concrete Block INC. | Clarks Summit | PA | — | ◇ UNVERIFIED |
| KGKing General Contractors INC | Bristol | VA | — | ◇ UNVERIFIED |
| KCKirkpatrick Concrete,inc. Plant 13 | Birmingham | AL | — | ◇ UNVERIFIED |
| KKoss #108 | North Little Rock | AR | — | ◇ UNVERIFIED |
| LCLargo Concrete | Colton | CA | — | ◇ UNVERIFIED |
| LCLarson Cement Stone CO | Omaha | NE | — | ◇ UNVERIFIED |
| LCLash Construction INC. | Santa Barbara | CA | — | ◇ UNVERIFIED |
| LBLee Brick & Block | Bowling Green | KY | — | ◇ UNVERIFIED |
| LMLee Masonry Products INC | Bardstown | KY | — | ◇ UNVERIFIED |
| LMLee Masonry Products INC | Lexington | KY | — | ◇ UNVERIFIED |
| LMLee Masonry Products INC | Antioch | TN | — | ◇ UNVERIFIED |
| LMLee Masonry Products INC | Hopkinsville | KY | — | ◇ UNVERIFIED |
| LMLee Masonry Products LLC | Bowling Green | KY | — | ◇ UNVERIFIED |
| LBLeonard Block Company | Winston Salem | NC | — | ◇ UNVERIFIED |
| LBLightweight Block CO | Lynchburg | VA | — | ◇ UNVERIFIED |
| LBLightweight Block Lexington Corporation | Lexington | NC | — | ◇ UNVERIFIED |
| LPLivonia Pre Cast LLC | Livonia | MI | — | ◇ UNVERIFIED |
| LLL.K. Lehman Trucking, Inc | Sonora | CA | — | ◇ UNVERIFIED |
| LCLoby Concrete Products CO | La Follette | TN | — | ◇ UNVERIFIED |
| LMLojac Materials INC | Lebanon | TN | — | ◇ UNVERIFIED |
| LPL P Mcnear Brick CO INC | San Rafael | CA | — | ◇ UNVERIFIED |
