| AHAsm Holdco Inc/contact Technologies INC | Saint Marys | — | ◐ LIKELY ACTIVE |
| BBetco-easton | Easton | 20–99 | ◐ LIKELY ACTIVE |
| BABonsal American INC | Bristol | — | ◐ LIKELY ACTIVE |
| DCDal-tile CORP Lincolnway East Plant | Gettysburg | — | ◐ LIKELY ACTIVE |
| DLDutchland LLC | Gap | 100–499 | ◐ LIKELY ACTIVE |
| FCFi-hoff Concrete Products INC | Johnstown | 20–99 | ◐ LIKELY ACTIVE |
| GCGlen-gery CORP Mid Atlantic Plant | Shoemakersville | — | ◐ LIKELY ACTIVE |
| GGGlen Gery Corporation Hanley Plant | Summerville | — | ◐ LIKELY ACTIVE |
| GCGlobal Custom Decorating | Curwensville | 20–99 | ◐ LIKELY ACTIVE |
| GIGraymont Industries | Pleasant Gap | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials US Cement Llc/ Nazareth | Nazareth | — | ◐ LIKELY ACTIVE |
| HKH & K Group/ Stockertown | Stockertown | — | ◐ LIKELY ACTIVE |
| IKIpsco Koppel Tubulars CORP | Koppel | — | ◐ LIKELY ACTIVE |
| KCKeystone Cement CO | Bath | — | ◐ LIKELY ACTIVE |
| LCLehigh Cement CO LLC | York | — | ◐ LIKELY ACTIVE |
| MVMcavoy Vitrified Brick CO | Phoenixville | — | ◐ LIKELY ACTIVE |
| MMclanahan/hollidaysburg | Hollidaysburg | 100–499 | ◐ LIKELY ACTIVE |
| MUMersen Usa/st Marys | Saint Marys | — | ◐ LIKELY ACTIVE |
| MPMonarch Products INC | York Haven | 20–99 | ◐ LIKELY ACTIVE |
| MAMorgan Am&t Coudersport Site | Coudersport | — | ◐ LIKELY ACTIVE |
| OGOwens-brockway Glass Container INC Plant 19 | Brockway | — | ◐ LIKELY ACTIVE |
| PGPittsburgh Glass Works LLC | Tyrone | 100–499 | ◐ LIKELY ACTIVE |
| PPPolymer Products CO INC | Stockertown | 20–99 | ◐ LIKELY ACTIVE |
| SCSika Corporation | Fairless Hills | 20–99 | ◐ LIKELY ACTIVE |
| TFTeledyne Flir Defense INC | Freeport | — | ◐ LIKELY ACTIVE |
| TITms International Llc/new Castle Plant | New Castle | — | ◐ LIKELY ACTIVE |
| VAVitro Architectural Glass (pa) | Carlisle | — | ◐ LIKELY ACTIVE |
| WBWatsontown Brick Co/watsontown Plt | Watsontown | — | ◐ LIKELY ACTIVE |
| WRWorld Resources CO | Pottsville | — | ◐ LIKELY ACTIVE |
| AWArmstrong World Industries | Marietta | — | ◐ LIKELY ACTIVE |
| CGCabinetworks Group Inc/thompsontown | Thompsontown | — | ◐ LIKELY ACTIVE |
| CICardinal Ig Company (mountain Top) | Mountain Top | — | ◐ LIKELY ACTIVE |
| EIErsvin Inds. INC. Amasteel Div. | Butler | — | ◐ LIKELY ACTIVE |
| HMHarsco Metals - Butler | Butler | — | ◐ LIKELY ACTIVE |
| PEPgh Elec Insulation Inc/munhall | Munhall | — | ◐ LIKELY ACTIVE |
| SGSaint Gobain Abrasives Montgomeryville Plt | Montgomeryville | — | ◐ LIKELY ACTIVE |
| UEUnion Electric Steel CORP | Burgettstown | — | ◐ LIKELY ACTIVE |
| APAds Pipe Dba Frederick Precast | Greencastle | — | ◇ UNVERIFIED |
| BCBall Corporation | Pittston | — | ◇ UNVERIFIED |
| BIBpi INC - New Castle Plant | New Castle | — | ◇ UNVERIFIED |
| CCCayuga Concrete Pipe | Croydon | — | ◇ UNVERIFIED |
| DLDutchland LLC | Christiana | — | ◇ UNVERIFIED |
| ECEastern Concrete Materials / Sharon Hill | Sharon Hill | — | ◇ UNVERIFIED |
Kopp Glass Inc/pgh | Swissvale | — | ◇ UNVERIFIED |
| NGNational Gypsum - Fedxcorp | Shippingport | — | ◇ UNVERIFIED |
| RBRedland Brick Inc/harmar Plt | Cheswick | — | ◇ UNVERIFIED |
| SGStoelzle Glass USA Inc/monaca Plt | Monaca | — | ◇ UNVERIFIED |
| UGUS Gypsum - Washingtonville Plant | Danville | — | ◇ UNVERIFIED |
| CCContinental Concrete Products, Inc | Pottstown | 20–99 | ◐ LIKELY ACTIVE |
Dubois Granite & Quartz LLC | Dubois | — | ◐ LIKELY ACTIVE |