| MMMutual Materials Company | Clackamas | — | ◇ UNVERIFIED |
| NSNatural Stone Designs INC | Tualatin | — | ◇ UNVERIFIED |
| NBNehalem Bay Ready Mix Mohler Sand & Gravel LLC | Nehalem | — | ◇ UNVERIFIED |
| NPNewcastle Precast LLC | Portland | — | ◇ UNVERIFIED |
| NDNull Designs in Stone INC | Portland | — | ◇ UNVERIFIED |
| NCNW Concrete Vent Wells LLC | Gervais | — | ◇ UNVERIFIED |
| OOldcastle | Keizer | — | ◇ UNVERIFIED |
| OOldcastle | Eugene | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Clackamas | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Tualatin | — | ◇ UNVERIFIED |
| OBOregon Block and Paver Manufacturing INC | Prineville | — | ◇ UNVERIFIED |
| OGOregon Glass Company | Wilsonville | — | ◇ UNVERIFIED |
| OOOregon On-site Concrete INC | Sherwood | — | ◇ UNVERIFIED |
| PSPacific Stone Installers LLC | Portland | — | ◇ UNVERIFIED |
| PMPdx Movers | Tualatin | — | ◇ UNVERIFIED |
| PDPinnacle Design/build Group INC | Corvallis | — | ◇ UNVERIFIED |
| PRPortable Ready Mix - Hillsboro | Hillsboro | — | ◇ UNVERIFIED |
| PGPortland Glass Manufacturing INC | Clackamas | — | ◇ UNVERIFIED |
| PMPortland Marble Works INC | Portland | — | ◇ UNVERIFIED |
| POPort of Tillamook Bay Wwspf | Tillamook | — | ◇ UNVERIFIED |
| PIPpg Industries INC | Salem | — | ◇ UNVERIFIED |
| PCPrecision Colored Glass LLP | Portland | — | ◇ UNVERIFIED |
| PCPrecision Countertops INC | Wilsonville | — | ◇ UNVERIFIED |
| PGPrecision Glassworks INC | Portland | — | ◇ UNVERIFIED |
| PRPrineville Ready Mix LLC | Prineville | — | ◇ UNVERIFIED |
| RDR D Mac INC | Island City | — | ◇ UNVERIFIED |
| RMR.d. Mac, INC. | Baker City | — | ◇ UNVERIFIED |
| RCReid Concrete LLC | La Pine | — | ◇ UNVERIFIED |
| RHRock Hard Granite Iii LLC | Bend | — | ◇ UNVERIFIED |
| RIRoss Island Boise Concrete Plant | Portland | — | ◇ UNVERIFIED |
| RIRoss Island Hardtack Island Plant | Portland | — | ◇ UNVERIFIED |
| RIRoss Island Sand and Gravel Tait Facility | Portland | — | ◇ UNVERIFIED |
| RIRoss Island Sand & Gravel CO | Portland | — | ◇ UNVERIFIED |
| SRSk Redfield INC | Sisters | — | ◇ UNVERIFIED |
| SCSky Cooper | Eugene | — | ◇ UNVERIFIED |
| SISlowfire, Inc. | Portland | — | ◇ UNVERIFIED |
| SRSolid Rock Granite LLC | Sisters | — | ◇ UNVERIFIED |
| SOSpirit of Glass INC | Portland | — | ◇ UNVERIFIED |
| SCStone Center INC | Portland | — | ◇ UNVERIFIED |
| SISuhor Industries INC | Clackamas | — | ◇ UNVERIFIED |
| SPSupreme Perlite Company | Portland | — | ◇ UNVERIFIED |
| TGThe Glass Forge Gallery & Studio LLC | Grants Pass | — | ◇ UNVERIFIED |
| TPThe Pottery Place LLC | Albany | — | ◇ UNVERIFIED |
| TQTosoh Quartz INC | Portland | — | ◇ UNVERIFIED |
| TATrautman Art Glass INC | West Linn | — | ◇ UNVERIFIED |
| TATrautman Art Glass INC | Wilsonville | — | ◇ UNVERIFIED |
| TATri Agg INC | South Beach | — | ◇ UNVERIFIED |
| TITri-agg INC | Waldport | — | ◇ UNVERIFIED |
| TITri-agg, INC. Dba Newport Ready Mix | South Beach | — | ◇ UNVERIFIED |
| TCTriple C Redi-mix | Baker City | — | ◇ UNVERIFIED |
