| 3M Company | Irvine | CA | 10 |
| 7/11 Materials, Inc. | Modesto | CA | 17 |
| Agcon, Inc. | Oro Grande | CA | 6 |
| Aggregate Products, Inc. | Thermal | CA | 6 |
| All American Asphalt | Corona | CA | 14 |
| Alpha Materials Inc | Jurupa Valley | CA | 6 |
| American Pavement Systems, Inc. | Modesto, Ca | CA | 2 |
| Ames Construction, Inc. | Duarte | CA | 7 |
| AngloGold Ashanti North America Inc. | Greenwood Village | CO | 9 |
| Asarco LLC | Sahuarita | AZ | 49 |
| Asphalt Specialties co Inc | Denver | CO | 3 |
| A Teichert and Son Inc | Pleasanton | CA | 37 |
| Atlas Energy Solutions Inc. | Austin | TX | 5 |
| Atlas Stone Fabricators, Inc. | Odenton | MD | 3 |
| Baldwin Contracting Company, Inc. | Marysville | CA | 7 |
| Barrick Gold of North America, Inc. | Elko | NV | 8 |
| Basalite Building Products LLC | Roseville | CA | 9 |
| Bhp Minerals Service Company | Tucson | AZ | 17 |
| Big River Construction Inc | Astoria | OR | 3 |
| Bj Rees's Enterprise | Lone Pine | CA | 5 |
| Bo Dean Co., Inc. | Santa Rosa | CA | 6 |
| Brubaker-Mann, Inc. | Barstow | CA | 12 |
| Buellflat Rock Company Inc. | Solvang | CA | 5 |
| Butte Equipment Rentals, Inc | Georgetown | CA | 6 |
| Calaveras Materials, Inc. | San Andreas | CA | 12 |
| Cal Grade Inc. | Niland | CA | 8 |
| Calmat Co | Irwindale | CA | 61 |
| CalPortland | Santa Maria | CA | 49 |
| Calportland Construction | Atascadero | CA | 15 |
| Canyon Rock Co., Inc | Forestville | CA | 5 |
| C. A. Rasmussen, Inc. | Valencia | CA | 3 |
| Carlota Copper Company | Miami | AZ | 2 |
| Carmeuse Lime & Stone, Inc. | Pittsburgh | PA | 9 |
| Cemex | West Sacramento | CA | 5 |
| CEMEX Construction Materials Pacific, LLC | Ontario | CA | 58 |
| Chandler Aggregates Inc | Lake Elsinore | CA | 22 |
| Cherry Crushed Concrete, Inc. Dba Arcosa Crushed Concrete | Houston | TX | 2 |
| Chili Bar LLC | Placerville | CA | 5 |
| Cind-r-lite Block Company | Lathropwells | NV | 5 |
| C.J. Miller, LLC | Hampstead | MD | 4 |
| Claystone Construction Inc | Fort Lupton | CO | 3 |
| Clearlake Lava, Inc. | Clearlake Oaks | CA | 12 |
| Climax Molybdenum Company | Phoenix | AZ | 17 |
| Coachella Valley Aggregates, Inc. | Indio | CA | 8 |
| Coast Aggregates | Palmdale | CA | 5 |
| Colacurcio Brothers Inc | Bellingham | WA | 5 |
| Cold Spring Granite Company | Clovis | CA | 9 |
| Connolly-Pacific Co. | Long Beach | CA | 3 |
| CONSOL Mining Company LLC | Canonsburg | PA | 5 |
| Core Natural Resources f/k/a CONSOL Mining Company LLC | Canonsburg | PA | 10 |
| Coronet Concrete Products, Inc. | Indio | CA | 11 |
| Coulson Excavating Company Inc | Loveland | CO | 2 |
| Crawford Associates | Blythe | CA | 6 |
| Dalrymple Gravel & Contracting | Elmira | NY | 4 |
| Distinctive Inc. | Seekonk | MA | 3 |
| Dolomite Products Company , Inc | Clifton Springs | NY | 5 |
| Double D Mining, LLC | Blythe | CA | 6 |
| Duke Sherwood Contracting, Inc. | Oroville | CA | 5 |
| Dv Natural Resources, LLC. | Trona | CA | 5 |
| Edison Sand Company | Bakersfield | CA | 6 |
| Eureka Ready Mix Concrete Co., Inc. | Fortuna | CA | 6 |
| Fireman Rock and Nursery, Inc. | Barstow | CA | 7 |
| Fisher Sand & Gravel Company | Dickinson | ND | 2 |
| Florida Canyon Mining, Inc. | Imlay | NV | 3 |
| FP Legend Stone LLC | Florence | TX | 2 |
| Franklin Construction Inc. | Chico | CA | 17 |
| Freeport-McMoRan Bagdad Inc. | Phoenix | AZ | 20 |
| Freeport-McMoRan Chino Mines Company | Phoenix | AZ | 7 |
| Freeport-McMoRan Exploration Corporation | Phoenix | AZ | 6 |
| Freeport-McMoRan Miami Inc. | Phoenix | AZ | 11 |
| Freeport-McMoRan Morenci Inc. | Phoenix | AZ | 59 |
| Freeport-McMoRan Safford Inc. | Phoenix | AZ | 15 |
| Freeport-McMoRan Sierrita Inc. | Phoenix | AZ | 13 |
| Freeport-McMoRan Tyrone Mining LLC | Phoenix | AZ | 3 |
| Freeport Minerals Corporation | Phoenix | AZ | 97 |
| Fst Sand & Gravel, Inc. | Corona | CA | 18 |
| F.W. Aggregates Inc. | Lone Pine | CA | 6 |
| G3 Enterprises, Inc. | Modesto | CA | 6 |
| Gail Materials, Inc. | Corona | CA | 10 |
| GEO Drilling Fluids, Inc. | Bakersfield | CA | 6 |
| Gillibrand Industrial Sands, Inc. | Simi Valley | CA | 7 |
| Global Pumice, LLC | Olancha | CA | 12 |
| Golden Queen Mining Company, LLC | Mojave | CA | 12 |
| Granite Rock Company | San Jose | CA | 24 |
| Gray & Son, Inc. | Timonium | MD | 8 |
| Griffith Company | Lebec | CA | 16 |
| Grimes Rock, Inc. | Fillmore | CA | 6 |
| Hahm International Inc. | Baker | CA | 6 |
| Haile Gold Mine, Inc. | Kershaw | SC | 11 |
| Hansen Bros. Enterprises | Grass Valley | CA | 9 |
| Hanson Aggregates Mid-Pacific, Inc. | Santa Margarita | CA | 8 |
| Hanson Aggregates Pacific Southwest Inc. | Lakeside | CA | 14 |
| Harbor Rail Services of California, Inc. | Pasadena | CA | 2 |
| Harris Transfer Inc. | Upland | CA | 11 |
| Hat Creek Construction & Materials, Inc. | Alturas | CA | 2 |
| Hawaiian Rock Products | Saipan | MP | 5 |
| Hecla Limited | Coeur D'Alene | ID | 2 |
| Hi-Grade Materials | Littlerock | CA | 29 |
| Imerys USA Inc. | Roswell | GA | 3 |
| Imperial Valley Aggregates, LLC | Ocotillo | CA | 14 |
| Ivanhoe Electric Inc. | Tempe | AZ | 6 |
| James T. Lynch Construction Co., Inc. | Reading | MA | 9 |
| Jaxon Enterprises | Le Grand | CA | 11 |
| Jones Water Trucks, Inc. | Redlands | CA | 7 |
| Jtl Group,inc. DBA Knife River Materials | Casper | WY | 4 |
| Kellog Creek Aggregates, Inc. | Mokelumne Hill | CA | 6 |
| Klingspor Abrasives, Inc. | Hickory | NC | 2 |
| Kloepfer Inc. | Paul | ID | 5 |
| LB3 Enterprises Inc. | Lakeside | CA | 2 |
| Legacy Vulcan, LLC - Subsidiary of Vulcan Materials Company | Birmingham | AL | 11 |
| Lehigh Southwest Cement Company | Cupertino | CA | 8 |
| Lhoist North America, Inc. | Fort Worth | TX | 14 |
| Lilac Solutions, Inc. | Oakland | CA | 8 |
| Lind Marine Incorporated | Vallejo | CA | 10 |
| Lloyd Enterprises Inc | Federal Way | WA | 3 |
| Mariana Minerals Co. | San Francisco | CA | 25 |
| Marietta Industrial Enterprises | Marietta | OH | 4 |
| Marigold Mining Company | Valmy | CO | 2 |
| Martin Marietta Northern California Aggregates, LLC | Sanger | CA | 8 |
| Marzano & Sons General Engineering Contractors, Inc. | Lee Vining | CA | 7 |
| Matich Corporation | San Bernardino | CA | 6 |
| Mayhew Aggregates & Mine Reclamation, LLC | Corona | CA | 5 |
| McLaughlin Engineering & Mining, Inc | Irwindale | CA | 6 |
| Missouri Cobalt, LLC | Clayton | MO | 4 |
| Mitsubishi Cement Corporation | Lucerne Valley | CA | 7 |
| Mittleider Excavating and Gravel Crushing, LLP | Buchanan | ND | 3 |
| MP Magnetics LLC | Las Vegas | NV | 11 |
| MP Mine Operations LLC | Las Vegas | CA | 10 |
| MP Mine Operations LLC | Las Vegas | NV | 20 |
| Mrc Rock & Sand, LLC | Upland | CA | 9 |
| Nevada Gold Mines LLC | Elko | NV | 71 |
| Newmont Cripple Creek & Victor Mining Company | Victor | CO | 2 |
| Newmont International Services Limited | Denver | CO | 28 |
| North County Sand and Gravel, Inc. | Murrieta | CA | 12 |
| Northern Aggregates, Inc | Willits | CA | 5 |
| Northern Star (POGO) LLC | Fairbanks | AK | 4 |
| North Star Foundations, Inc. | Frederick | MD | 3 |
| North Star Minerals, Inc. | Acton | CA | 6 |
| North Valley Rock LLC | Willows | CA | 9 |
| Nyrstar Clarksville, Inc. | Clarksville | TN | 8 |
| Nyrstar Tennessee Mines - Strawberry Plains, LLC | Strawberry Plains | TN | 8 |
| Oil Dri Corporation of America | Taft | CA | 8 |
| Pabco Clay Products, LLC | Sacramento | CA | 5 |
| Pacific Aggregates | Lake Elsinore | CA | 8 |
| Pacific Rock, Inc. | Camarillo | CA | 7 |
| Painted Hills Mining Company, Inc. | Whitewater | CA | 6 |
| Pavestone | Grapevine | TX | 3 |
| Pessoa Construction Company | Parkville | MD | 5 |
| Pinto Valley Mining Corp. | Miami | AZ | 13 |
| Plymouth Sand & Gravel | Plymouth | CA | 7 |
| Porterville Rock & Recycle, Inc. | Porterville | CA | 5 |
| Portola Minerals Company | Columbia | CA | 6 |
| Quality Aggregates | Jurupa Valley | CA | 7 |
| Recycled Base Materials, Inc. | Westlake Village | CA | 7 |
| Resolution Copper Company | Superior | AZ | 6 |
| Rich-Ted Trucking, Inc. | Kelseyville | CA | 6 |
| Rio Tinto Minerals, Inc. | Cartago | CA | 9 |
| Rio Tinto Services Inc. | South Jordan | UT | 32 |
| Riverside Milling Co., Inc. | Jurupa Valley | CA | 5 |
| R. & J. Joy, Inc. | Beckwourth | CA | 9 |
| Robertson's Ready Mix Ltd A California Limited Partnership | Redlands | CA | 20 |
| Rock Structures Construction Company | Corona | CA | 11 |
| Rogers Management, Inc. | Nashville | TN | 8 |
| Round Mountain Gold Corporation | Round Mountain | NV | 2 |
| Santa Fe Aggregates, Inc. | Winton | CA | 12 |
| Santa Paula Materials, Inc. | Santa Paula | CA | 5 |
| Sealevel Construction Inc | Thibodaux | LA | 2 |
| Searles Valley Minerals Inc | Trona | CA | 8 |
| Seduli Sutter Operations Corporation | Sutter Creek | CA | 10 |
| Shawn Barker Construction Inc | Trona | CA | 5 |
| Sierra Aggregate Company, Inc. | Lucerne Valley | CA | 7 |
| Sierra Rock Products, Inc. | Jamestown | CA | 7 |
| Silica Resources, Inc. | Marysville | CA | 6 |
| Sisecam Chemicals Wyoming LLC | Atlanta | GA | 4 |
| Sls&n Inc. | Monrovia | CA | 5 |
| So Cal Sandbags, Inc. | Corona | CA | 5 |
| Soiland Co., Inc. | Cotati | CA | 5 |
| Specialty Granules LLC | Ione | CA | 5 |
| Specialty Minerals Inc. | Lucerne Valley | CA | 9 |
| SSR Management, Inc. | Denver | CO | 9 |
| Star Stone Quarries Inc | Oakley | ID | 11 |
| Stevens Creek Quarry, Inc. | Cupertino | CA | 9 |
| Stutzke Stone | Clark Fork | ID | 10 |
| Superior Ready Mix Concrete LP | El Centro | CA | 34 |
| Syar Industries, Inc. | Napa | CA | 9 |
| Sydney Peak Stone Inc. | Randsburg | CA | 7 |
| Taishan Resources LLC | Wilcoe | WV | 3 |
| Tapo Rock and Sand, Inc. | Simi Valley | CA | 6 |
| Teck Alaska Incorporated | Anchorage | AK | 12 |
| Thieneman Construction, Inc. | Westfield | IN | 2 |
| Thiess Mining USA Inc. | Salt Lake City | UT | 5 |
| Thorin Resources, LLC | Ouray | CO | 3 |
| Tidewater Contractors Inc. | Smith River | CA | 5 |
| Tintic Consolidated Metals, LLC | Eureka | UT | 2 |
| Triangle Rock Products, LLC | Oroville | CA | 10 |
| Troesh Recycling, Inc. DBA Roxsand | Nipomo | CA | 5 |
| True Organic Products Inc. | Helm | CA | 3 |
| Turf Care Supply, LLC | Hatfield | MA | 5 |
| Twin Mountain Rock Venture, LLC. | Little Lake | CA | 6 |
| United Rock Products Corp. | Irwindale | CA | 7 |
| United States Gypsum Company | Ocotillo | CA | 10 |
| United States Pumice Company | Lee Vining | CA | 7 |
| Upland Rock Inc | Mentone | CA | 10 |
| USA Rare Earth, Inc | Stillwater | OK | 8 |
| US Mine Corporation | Ione | CA | 7 |
| Viborg Sand & Gravel, Inc. | Paso Robles | CA | 7 |
| Victoria Granite Works, Inc. | Cicero | IL | 3 |
| Vulcan Materials | Hermitage | TN | 5 |
| Vulcan Materials Company | Birmingham | AL | 24 |
| Vulcan Materials Company | Petaluma | CA | 31 |
| Wayne J. Sand & Gravel, Inc. | Moorpark | CA | 6 |
| West Coast Aggregates Supply Inc. | Indio | CA | 6 |
| West Coast Aggregate Supply Inc. | Thermal | CA | 11 |
| Western Engineering Contractors, Inc. | Loomis | CA | 3 |
| Western Mesquite Mines, Inc. | Brawley | CA | 10 |