| HCHippo Concrete LLC | King of Prussia | — | ◇ UNVERIFIED |
| HGH&k Group, INC. | Birdsboro | — | ◇ UNVERIFIED |
| HCHowell Craft INC. | Elizabeth | — | ◇ UNVERIFIED |
| HIHpkd INC. | Pittsburgh | — | ◇ UNVERIFIED |
| HYH Y K Construction Co., INC. | Collegeville | — | ◇ UNVERIFIED |
| HCHyk Construction Co., INC. | Coopersburg | — | ◇ UNVERIFIED |
| IIIca, INC. | Lehighton | — | ◇ UNVERIFIED |
| IDIms Div - Tube City Ims | Belle Vernon | — | ◇ UNVERIFIED |
| IAIndustrial Abrasives CO. | Reading | — | ◇ UNVERIFIED |
| ISInterstate Safety Service, Incorporated | Clarks Summit | — | ◇ UNVERIFIED |
| ICIsland Concrete | Duncannon | — | ◇ UNVERIFIED |
| JBJdn Block, INC | Lansdale | — | ◇ UNVERIFIED |
| JHJ & H Concrete CO. | Wilkes Barre | — | ◇ UNVERIFIED |
| JKJ.J. Kennedy, Inc. | Imperial | — | ◇ UNVERIFIED |
| JCJmm Concrete Designs LLC | Pittsburgh | — | ◇ UNVERIFIED |
| JDJohn D Shaffer | Latrobe | — | ◇ UNVERIFIED |
| JSJones Stone & Marble, INC. | Greensburg | — | ◇ UNVERIFIED |
| JRJRG Realty Limited LLC | Thompson | — | ◇ UNVERIFIED |
| KFKauffman Family LP Land Development Renewal | Sadsbury, Township of | — | ◇ UNVERIFIED |
| KPKey Precast & Supply, INC. | Butler | — | ◇ UNVERIFIED |
| KCKeystone Concrete Block and Supply Company, INC. | Scranton | — | ◇ UNVERIFIED |
| KCKeystone Concrete Block INC. | Clarks Summit | — | ◇ UNVERIFIED |
| KPKeystone Portland Cement/east Allen | Bath | — | ◇ UNVERIFIED |
| KLKischland LLC | Pittsburgh | — | ◇ UNVERIFIED |
| KMKurtz Monument Company | Washington | — | ◇ UNVERIFIED |
| LHLane Holdings | Carnegie | — | ◇ UNVERIFIED |
| LAL a Stone & Kitchens, LLC. | Brodheadsville | — | ◇ UNVERIFIED |
| LCLesney Concrete Specialist | Tarentum | — | ◇ UNVERIFIED |
| LULexmar USA | Mckeesport | — | ◇ UNVERIFIED |
| LSLiving Stones Masonry | Columbia | — | ◇ UNVERIFIED |
| L3Lock 3 Company | Monongahela | — | ◇ UNVERIFIED |
| MMMajesty Marble and Granite, INC. | Philadelphia | — | ◇ UNVERIFIED |
| MMMajesty Marble and Granite, INC. | Aston | — | ◇ UNVERIFIED |
| MCMckenzie Concrete Products, INC. | Fayetteville | — | ◇ UNVERIFIED |
| MRMeadville Redi-mix Concrete, INC. | Meadville | — | ◇ UNVERIFIED |
| MSMeshoppen Stone INC. | Meshoppen | — | ◇ UNVERIFIED |
| MIMfs Inc/mineral Wool Plt 1 | Bethlehem | — | ◇ UNVERIFIED |
| MPMineral Processing Specialties Inc. | Springdale | — | ◇ UNVERIFIED |
| MPMineral Processing Specialties Inc. | Bessemer | — | ◇ UNVERIFIED |
| MAMolded Acoustical Products of Easton, INC. | Easton | — | ◇ UNVERIFIED |
| MFMRBBB Futures Glass LLC | Allentown | — | ◇ UNVERIFIED |
| MPMudworks Pottery, LLC | Effort | — | ◇ UNVERIFIED |
| NSNatural Stoneworks | Lancaster | — | ◇ UNVERIFIED |
| NCNesl Chambersburg Facility | Chambersburg | — | ◇ UNVERIFIED |
| NCNesl CO Inc/ Earl Twp Hinkletown Asphalt Plant and Quarry | Ephrata | — | ◇ UNVERIFIED |
| NBNew Bethlehem Burial Services, INC. | New Bethlehem | — | ◇ UNVERIFIED |
| NFNolde Forest Pottery LLC | Mohnton | — | ◇ UNVERIFIED |
| NANortheast Architectural Products INC. | Archbald | — | ◇ UNVERIFIED |
| NPNortheast Prestressed Products, LLC | Brogue | — | ◇ UNVERIFIED |
| NPNortheast Prestressed Products, LLC. | Pottsville | — | ◇ UNVERIFIED |
