| RRRamsey Rmx, Minneapolis Rmx, St Paul Rmx | Minneapolis | MN | — | ◐ LIKELY ACTIVE |
| RRRancho Ready Mix Products, L.P Lake Elsinore | Colton | CA | 1–19 | ◐ LIKELY ACTIVE |
| RCRanger Construction Industries, INC. | Fort Pierce | FL | — | ◐ LIKELY ACTIVE |
| RCRc Concrete | Burgettstown | PA | — | ◐ LIKELY ACTIVE |
| RCRea Construction Company | Raleigh | NC | — | ◐ LIKELY ACTIVE |
| RCRea Construction Company Garner | Raleigh | NC | — | ◐ LIKELY ACTIVE |
| RCRea Construction Company Gresham Lake | Raleigh | NC | — | ◐ LIKELY ACTIVE |
| RCRea Construction Company Kannapolis Place | Kannapolis | NC | — | ◐ LIKELY ACTIVE |
| RCRea Contracting, Limited Liability Company Kings Mountain | Kings Mountain | NC | — | ◐ LIKELY ACTIVE |
| RMReady Mix Concrete, INC. | Fredericktown | MO | — | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete Company - Old Stage Road | Chester | VA | — | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete CO - Plant 1 | Denver | CO | — | ◐ LIKELY ACTIVE |
| RMReady Mix USA LLC. | Dallas | GA | — | ◐ LIKELY ACTIVE |
| RMReady Mix Usa, LLC - Bay Minette | Bay Minette | AL | — | ◐ LIKELY ACTIVE |
| RMReady Mix Usa, LLC Dba Boones Creek Concrete Plant | Johnson City | TN | — | ◐ LIKELY ACTIVE |
| RMReady Mix USA - Racetrack Road Plant | Fort Walton Beach | FL | — | ◐ LIKELY ACTIVE |
| RRRealco Recycling CO. INC. | Jacksonville | FL | — | ◐ LIKELY ACTIVE |
| RCReames&son Construction | Valdosta | GA | — | ◐ LIKELY ACTIVE |
| RERed E Mix LLC | Highland | IL | — | ◐ LIKELY ACTIVE |
| RERed E Mix LLC | Troy | IL | — | ◐ LIKELY ACTIVE |
| RQRedland Quarries Ny Inc-lockport Quarry | Lockport | NY | — | ◐ LIKELY ACTIVE |
| RARedmon Asphalt, INC. | Selmer | TN | — | ◐ LIKELY ACTIVE |
| RFRedwood Falls Ready Mix | Redwood Falls | MN | 1–19 | ◐ LIKELY ACTIVE |
| RCReed Contracting Services | Huntsville | AL | — | ◐ LIKELY ACTIVE |
| RCReeves Construction Company - Lakeside Asphalt Plant | Greenville | SC | — | ◐ LIKELY ACTIVE |
| RCReeves Construction Company - North Columbia Asphalt Plant | Columbia | SC | — | ◐ LIKELY ACTIVE |
| RCReeves Construction-whitlock Hot Mix Asphalt Plant | Brunswick | GA | — | ◐ LIKELY ACTIVE |
| RCReis Concrete Products INC | Falmouth | KY | — | ◐ LIKELY ACTIVE |
| RCReliable Contracting Company, INC. - Gambrills | Millersville | MD | — | ◐ LIKELY ACTIVE |
| RCReliable Contracting Company, INC. - Glen Burnie | Glen Burnie | MD | — | ◐ LIKELY ACTIVE |
| RCRenfro Construction Company, INC. | Athens | TN | — | ◐ LIKELY ACTIVE |
| RPRe Pierson Materials CORP | Logan Twp | NJ | — | ◐ LIKELY ACTIVE |
| RPR.e. Pierson Materials Vineland Concrete | Vineland | NJ | — | ◐ LIKELY ACTIVE |
| RARichards Asphalt and Materials, INC. | Sparta | TN | — | ◐ LIKELY ACTIVE |
Richards-wilbert INC - Roanoke Valley | Salem | VA | — | ◐ LIKELY ACTIVE |
| RBRiegler Blacktop, INC | Florence | KY | — | ◐ LIKELY ACTIVE |
| RMRightmyer Machine Rentals INC | Gaston | NC | — | ◐ LIKELY ACTIVE |
| RMRiley Materials (0339020175) | Norwalk | OH | — | ◐ LIKELY ACTIVE |
| RPRiley Paving INC. | Haw River | NC | — | ◐ LIKELY ACTIVE |
| RMRinker Materials Concrete Pipe Division | Whitestown | IN | — | ◐ LIKELY ACTIVE |
| RMRinker Materials - Grand Junction | Grand Junction | CO | — | ◐ LIKELY ACTIVE |
| RCRiver City Concrete, INC. - Savannah | Savannah | TN | — | ◐ LIKELY ACTIVE |
| RCRiver City Supply | Macomb | IL | — | ◐ LIKELY ACTIVE |
| RCRiverside Const Materials/bristol Twp | Bristol | PA | — | ◐ LIKELY ACTIVE |
| RHRk Hall, LLC. | De Queen | AR | — | ◐ LIKELY ACTIVE |
| RCRmc Carolina Materials Incorporated | Stokesdale | NC | — | ◐ LIKELY ACTIVE |
| RBRoanoke Block - Plant 716 | Roanoke | VA | — | ◐ LIKELY ACTIVE |
| RCRoanoke Cement Company | Winston Salem | NC | — | ◐ LIKELY ACTIVE |
| RRRobertson Ready Mix | Winfield | AL | — | ◐ LIKELY ACTIVE |
| RARockingham Asphalt INC - Harrisonburg | Harrisonburg | VA | — | ◐ LIKELY ACTIVE |