| OSOldcastle Sw Group, INC. Dba B&b Excavat | Eagle | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group INC. Dba Four Corners | Cortez | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group- Port Concrete Plant | Gunnison | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Grp - Gunnison Redi-mix Pit | Gunnison | CO | — | ◇ UNVERIFIED |
| OIOlipdp Ii LLC - Mggt-gl Production Facility | Vinton | LA | — | ◇ UNVERIFIED |
| OPOmega Products International, INC. | Commerce City | CO | — | ◇ UNVERIFIED |
| OPOneonta Plant | Oneonta | AL | — | ◇ UNVERIFIED |
| OPOrchard Park Plant | Orchard Park | NY | — | ◇ UNVERIFIED |
| OMOremus Material LLC | Chicago | IL | — | ◇ UNVERIFIED |
| OROrgain Ready Mix Concrete Co., INC. | Clarksville | TN | — | ◇ UNVERIFIED |
| OROrgain Ready Mix Concrete Co., INC. | Murfreesboro | TN | — | ◇ UNVERIFIED |
| OCOsage County Industries Inc-linn | Linn | MO | — | ◇ UNVERIFIED |
| OCOsborne Co., LTD. | Valley View | OH | — | ◇ UNVERIFIED |
| OIOsborne INC. | Cleveland | OH | — | ◇ UNVERIFIED |
| OROscar Renda Contracting, Biloxi North Facility | Biloxi | MS | — | ◇ UNVERIFIED |
| OCOsceola Concrete LLC | Osceola | MO | — | ◇ UNVERIFIED |
| OTO Tex Pumping Fenelton | Fenelton | PA | — | ◇ UNVERIFIED |
| OROverland Ready Mixed Super 8 | No City Name | NE | — | ◇ UNVERIFIED |
| OSOverton Sand & Gravel CO | Lexington | NE | — | ◇ UNVERIFIED |
| OSOverton Sand & Gravel Company | Overton | NE | — | ◇ UNVERIFIED |
| OBOwens Brothers Concrete CO | Arvada | CO | — | ◇ UNVERIFIED |
| OAOxford Auxiliary Division of B and B Concrete Company INC | Oxford | MS | — | ◇ UNVERIFIED |
| OBOzark Building Materials, LLC Plant 1 | Saint Louis | MO | — | ◇ UNVERIFIED |
| OROzark Ready Mix | Eldon | MO | — | ◇ UNVERIFIED |
| OROzark Ready Mix Company INC. | Linn Creek | MO | — | ◇ UNVERIFIED |
| OROzark Ready Mix Company, INC. | Lebanon | MO | — | ◇ UNVERIFIED |
| OROzark Ready Mix Kc - Kansas City, Kansas | Kansas City | KS | — | ◇ UNVERIFIED |
| OROzark Ready Mix Kc - Kansas City, Missouri | Kansas City | MO | — | ◇ UNVERIFIED |
| OROzark Ready Mix Kc - Olathe, Kansas | Olathe | KS | — | ◇ UNVERIFIED |
| OROzark Ready Mix - Osage Beach | Osage Beach | MO | — | ◇ UNVERIFIED |
| OROzark Ready Mix - Show Me Ready Mix | Lake Lotawana | MO | — | ◇ UNVERIFIED |
| OBOzinga Bros INC | Joliet | IL | — | ◇ UNVERIFIED |
| OBOzinga Bros Inc-mccook Plant | Mccook | IL | — | ◇ UNVERIFIED |
| OCOzinga Concrete Products - Hampshire | Hampshire | IL | — | ◇ UNVERIFIED |
| OCOzinga Concrete Products Huntley | Huntley | IL | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Elgin | IL | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Monee | IL | — | ◇ UNVERIFIED |
| OMOzinga - Miami Plant | Miami | FL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix | Naperville | IL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix | Roscoe | IL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix | Chicago Heights | IL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix - 103rd St Plant | Chicago | IL | — | ◇ UNVERIFIED |
| OROzinga Ready-mix-belvidere | Belvidere | IL | — | ◇ UNVERIFIED |
| OROzinga Ready-mix-channahon | Channahon | IL | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete - Bremen | Bremen | IN | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete - Elkhart E | Elkhart | IN | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete - Gary | Gary | IN | — | ◇ UNVERIFIED |
| OROzinga Ready Mix Concrete INC | Carol Stream | IL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix Concrete INC | Calumet Park | IL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix Concrete INC | Aurora | IL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix Concrete INC | Marengo | IL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix Concrete INC - Manteno | Manteno | IL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix Concrete INC. - South Bend | South Bend | IN | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete -lisbon/sussex | Sussex | WI | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete - Mchenry | Mchenry | IL | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete - Monee | Monee | IL | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete - Oak Creek | Oak Creek | WI | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete-wheatfield | Wheatfield | IN | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Davie | Fort Lauderdale | FL | — | ◇ UNVERIFIED |
| OROzinga Ready-mix-deerfield Beach | Pompano Beach | FL | — | ◇ UNVERIFIED |
| OROzinga Ready-mix-dekalb | Dekalb | IL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix-golden Glades | Miami | FL | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Goshen | Goshen | IN | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Miami 17th St | Miami | FL | — | ◇ UNVERIFIED |
| OSOzinga South Florida, Inc., Proposed Miami Gardens Cbp | Miami | FL | — | ◇ UNVERIFIED |
| OSOzinga South Florida INC. - Riviera Beach Plant 440 | Riviera Beach | FL | — | ◇ UNVERIFIED |
| OWOzinga Waveland | Franklin Park | IL | — | ◇ UNVERIFIED |
| PCPacific Cast Stone | Lincoln | NE | — | ◇ UNVERIFIED |
| PRPai Ready Mix LLC - Many Plant | Many | LA | — | ◇ UNVERIFIED |
| PBPalmdale Batch Plant | Palmdale | CA | — | ◇ UNVERIFIED |
| PTPalomar Transit Mix CO | Escondido | CA | — | ◇ UNVERIFIED |
| PRParadise Ready Mix | Paradise | CA | — | ◇ UNVERIFIED |
| PPParamount Precast Design INC | Sun Valley | CA | — | ◇ UNVERIFIED |
| PRParamount Ready Mix Concrete Plant 23 | Paramount | CA | — | ◇ UNVERIFIED |
| PUParex USA | Cleburne | TX | — | ◇ UNVERIFIED |
| PRParish Ready Mix,inc. | Walker | LA | — | ◇ UNVERIFIED |
| PCPark City Ready-mix Concrete | Park City | UT | — | ◇ UNVERIFIED |
| PCParleys Canyon Aggregate (pit 16) | Salt Lake County | UT | — | ◇ UNVERIFIED |
| PPaschen-newberg-foster | Chicago | IL | — | ◇ UNVERIFIED |
| PIPaulsen INC. (portable) | Portable | KS | — | ◇ UNVERIFIED |
| PCPavestone Company | Fountain | CO | — | ◇ UNVERIFIED |
| PTPavestone - Tyrone, Ga Plant | Tyrone | GA | — | ◇ UNVERIFIED |
| PRPaxton Ready Mix INC | Paxton | IL | — | ◇ UNVERIFIED |
| PCPayless Concrete-atchison St | Saint Joseph | MO | — | ◇ UNVERIFIED |
| PCPcl Construction Services | Auburn | WA | — | ◇ UNVERIFIED |
| PAPcr Aquisitions Dba Campania Intl Inc/quakertown | Quakertown | PA | — | ◇ UNVERIFIED |
| PLPdk Liquid Stone Partners LP | Midlothian | TX | — | ◇ UNVERIFIED |
| PRPeak Ready Mix - Steamboat Springs Batch | Steamboat Springs | CO | — | ◇ UNVERIFIED |
| PAPearson - Andover (stormwater) | Andover | KS | — | ◇ UNVERIFIED |
| PEPearson - El Dorado (stormwater) | El Dorado | KS | — | ◇ UNVERIFIED |
| PEPearson - Eureka Facility | Eureka | KS | — | ◇ UNVERIFIED |
| PHPearson - Howard (stormwater) | Howard | KS | — | ◇ UNVERIFIED |
| PNPearson - Northshore (stormwater) | Wichita | KS | — | ◇ UNVERIFIED |
| PPPearson - Plant 3 (stormwater) | Wichita | KS | — | ◇ UNVERIFIED |
| POPece of Mind Environmental - Concrete Crusher Yard | Orlando | FL | — | ◇ UNVERIFIED |
| PDPee Dee Ready Mix | Effingham | SC | — | ◇ UNVERIFIED |
| PJPenn Jersey Bldg Materials-dial Block | Tuckahoe | NJ | — | ◇ UNVERIFIED |
| PWPenn-mar Wilbert | York | PA | — | ◇ UNVERIFIED |
| PSPennsy Supply INC Paxton St Ready Mix | Harrisburg | PA | — | ◇ UNVERIFIED |
| PSPenny S Concrete | Shawnee | KS | — | ◇ UNVERIFIED |