| GBGlenstone Block Co-glenstone Block CO | Springfield | MO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| GMGraymont Materials, INC. | Plattsburgh | NY | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| HIHarsco Infrastructure | Marion | OH | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| HCH C Muddox | Ione | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| HWHead West INC | Compton | CA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| HCHenry Camosse and Son | Worcester | MA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| HWHickman Williams & Company | Etna | PA | Plastics and Rubber Products Manufacturing326192 | — | ◇ UNVERIFIED |
| HTHovey Tile Art | Mentone | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| HHudson-denton | Hudson | FL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| IBIbc Block Mfg LLC | Champaign | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| ICIdeal Concrete Block Company, INC. | Westford | MA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| IBInnovative Block Plant | La Feria | TX | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| ITInnovative Technology & Materials INC | Chicago | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| ICInterlock Concrete Products, INC. | Jordan | MN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| JHJericho Holdings, LLC | Kinston | NC | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| JCJerry's Concrete Pumping Service LLC | Lithia | FL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| JGJ.f. Gillespie, INC. | Vineland | NJ | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| JBJohns Building Supply CO. INC. | Cheshire | MA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| JSJoplin Stoneworks LLC | Duenweg | MO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| JMJoseph Mining CO | Mcdowell | KY | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| KIKellystone, INC. | Lake Charles | LA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| KCKeystone Concrete Block and Supply Company, INC. | Scranton | PA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| KCKeystone Concrete Block INC. | Clarks Summit | PA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| KKoss #108 | North Little Rock | AR | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LCLargo Concrete | Colton | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LMLee Masonry Products INC | Antioch | TN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LMLee Masonry Products INC | Bardstown | KY | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LMLee Masonry Products INC | Hopkinsville | KY | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LMLee Masonry Products LLC | Bowling Green | KY | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LPLivonia Pre Cast LLC | Livonia | MI | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LLL.K. Lehman Trucking, Inc | Sonora | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LCLoby Concrete Products CO | La Follette | TN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LMLojac Materials INC | Lebanon | TN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LPL P Mcnear Brick CO INC | San Rafael | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| LCL&s Concrete and Redi Mix | Plummer | ID | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MFManuel Flores Concrete Construction INC | Calexico | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MLMarcaco LLC | Albany | NY | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MCMarshall Concrete Products INC | Hutchinson | MN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MCMartinsburg Concrete Products | Martinsburg | WV | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MSMatt Stone CO INC | Lexington | KY | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MAMckinney Ave Plt | Houston | TX | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MCMcMaster Concrete Products of Haines City, LLC (TDN Holdings, LLC | Haines City | FL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MDMenards Distribution Center | Mckenzie | ND | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MBMeridian Brick Llc, Bessemer Plant No. 6, LLC | Bessemer | AL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| MCMidland Concrete Products | Hiawatha | IA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MNM & N Manufacturing | Poughkeepsie | NY | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MCModern Concrete Incorporated | Moorhead | MN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MVMohican Valley Concrete Corporation, the | Fairfield | CT | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MSMonty Sanitation | Fort Myers | FL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| MMMudart Molds | Pocatello | ID | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
