| AHAmc Home Remodelers | Philadelphia | — | ◇ UNVERIFIED |
| APAmerican Precision Glass Corporation | Duryea | — | ◇ UNVERIFIED |
| ATAmerican Tank & Concrete Service | Greensburg | — | ◇ UNVERIFIED |
| ASAppalachian Stone INC. | Lemoyne | — | ◇ UNVERIFIED |
| ASAppleridge Stone International, INC. | Blairsville | — | ◇ UNVERIFIED |
| APA P, Rhodes LLC | Pittsburgh | — | ◇ UNVERIFIED |
| ACArrow Concrete Company | Pittsburgh | — | ◇ UNVERIFIED |
| ACAtlantic Custom Granite & Marble, INC. | Dallastown | — | ◇ UNVERIFIED |
| ASAyers Supply, Inc. | Clarks Summit | — | ◇ UNVERIFIED |
 Baltimore Fabrication | Emigsville | — | ◇ UNVERIFIED |
| BIBay Industries INC. | Easton | — | ◇ UNVERIFIED |
| BIBay Industries Inc., Dba Bay Insulation of Pennsylvania | Easton | — | ◇ UNVERIFIED |
| BDBd & D Specialty Fabrication and Machine LLC | Curwensville | — | ◇ UNVERIFIED |
| BBBeavertown Block Co., INC. | East Freedom | — | ◇ UNVERIFIED |
| BMBella Marble and Granite, INC | Warminster | — | ◇ UNVERIFIED |
| BSBello Stone LLC | Drumore | — | ◇ UNVERIFIED |
| BMBerta Marble Design LLC | Huntingdon Valley | — | ◇ UNVERIFIED |
| BWBlairsville Wilbert Vault Company | Mount Pleasant | — | ◇ UNVERIFIED |
| BMBpb Mfg Inc/ Harding | Pittston | — | ◇ UNVERIFIED |
| BMBravo Marble and Granite, INC. | Lancaster | — | ◇ UNVERIFIED |
| BCBrentanos Concrete Connection, INC. | Pittsburgh | — | ◇ UNVERIFIED |
| BGBrian Giniewski LLC | Philadelphia | — | ◇ UNVERIFIED |
| BSButler Stone Craft, INC. | Cabot | — | ◇ UNVERIFIED |
| CLCardinal Lg Company | Jessup | — | ◇ UNVERIFIED |
| CBCarlini Brothers CO. | Pittsburgh | — | ◇ UNVERIFIED |
| CMCatawissa Monument, INC. | Catawissa | — | ◇ UNVERIFIED |
| CCCayuga Concrete Pipe | New Britain | — | ◇ UNVERIFIED |
| CCCellular Concrete Solutions LLC | Allentown | — | ◇ UNVERIFIED |
| CSCeltic Stone Granite and Tile LLC | Allentown | — | ◇ UNVERIFIED |
| CCCentermoreland Concrete Products | Tunkhannock | — | ◇ UNVERIFIED |
| CRCe Ready Mix/irwin Concrete | Irwin | — | ◇ UNVERIFIED |
| CLChattanooga Labeling Systems | Galeton | — | ◇ UNVERIFIED |
| CMCity Materials Services, INC. | Hermitage | — | ◇ UNVERIFIED |
| CSConcrete Safety Systems, LLC | Bethel | — | ◇ UNVERIFIED |
| CSConcrete Step Units INC | Scranton | — | ◇ UNVERIFIED |
| CCContract Crushing Const - Patton Site | Belle Vernon | — | ◇ UNVERIFIED |
| CICoon Industries, INC. | Pittston | — | ◇ UNVERIFIED |
| CACorning Asahi Video Prod Co/state College | State College | — | ◇ UNVERIFIED |
| CGCorporate Glass INC. | Erie | — | ◇ UNVERIFIED |
| CBCovered Bridge Precast | Ephrata | — | ◇ UNVERIFIED |
| CBCreamton Block, LLC | Lake Como | — | ◇ UNVERIFIED |
| CCunard | Morrisdale | — | ◇ UNVERIFIED |
| DBDarlington Brick & Clay/darlington | Darlington | — | ◇ UNVERIFIED |
| DHDectile Harkus Construction | Butler | — | ◇ UNVERIFIED |
| DVDeihl Vault & Precast, INC. | Orangeville | — | ◇ UNVERIFIED |
| DVDelaware Valley Concrete Company, INC. | Conshohocken | — | ◇ UNVERIFIED |
| DVDelaware Valley Concrete Company, INC. | Kennett Square | — | ◇ UNVERIFIED |
| DRDelta Ready Mix Concrete | Delta | — | ◇ UNVERIFIED |
| DSDesavino & Sons, Incorporated | Olyphant | — | ◇ UNVERIFIED |
| DSDiaz Stone and Pallet, INC. | Kingsley | — | ◇ UNVERIFIED |
