| AGArdagh Glass INC. (port Allegany) | Port Allegany | 100–499 | ● ACTIVE |
Bent Glass Design, INC. | Hatboro | 20–99 | ● ACTIVE |
Bethlehem Pre-cast INC | Bethlehem | 20–99 | ● ACTIVE |
Du-co Ceramics Company | Saxonburg | 100–499 | ● ACTIVE |
| ECEaton CORP | Beaver | — | ● ACTIVE |
Gbc Advanced Materials LLC | Latrobe | 20–99 | ● ACTIVE |
Gichner Systems Group, INC. | Dallastown | 100–499 | ● ACTIVE |
High Concrete Group, LLC | Denver | 100–499 | ● ACTIVE |
| MRMagnesita Refractories/york | York | 100–499 | ● ACTIVE |
National Magnetics Group, INC. | Bethlehem | 100–499 | ● ACTIVE |
| NPNortheast Prestressed Prod LLC | Cressona | 20–99 | ● ACTIVE |
| OUOpta USA Inc/opta Myoma Plt | Mars | 1–19 | ● ACTIVE |
Reading Precast INC | Leesport | 20–99 | ● ACTIVE |
Sauereisen INC | Pittsburgh | 20–99 | ● ACTIVE |
Schott North America, INC. | Duryea | 100–499 | ● ACTIVE |
Sun Precast Co., INC. | Beaver Springs | — | ● ACTIVE |
Universal Manufacturing CORP. | Zelienople | 20–99 | ● ACTIVE |
| UGUS Gypsum CO - Aliquippa Facility | Aliquippa | 100–499 | ● ACTIVE |
Veritas Medical Solutions LLC | Harleysville | 20–99 | ● ACTIVE |
| VMVitro Meadville Flat Glass Meadville Plt/crawford | Cochranton | 100–499 | ● ACTIVE |
A.c. Miller Concrete Products, INC | Spring City | — | ● ACTIVE |
Certech, INC. | Hanover Township | — | ● ACTIVE |
Crystal Imagery, INC | York Springs | — | ● ACTIVE |
Graymont (pa) INC. | Bellefonte | — | ● ACTIVE |
| GLGreat Lakes Vault & Precast Girard | Girard | 1–19 | ● ACTIVE |
Kadco Ceramics, LLC | Easton | — | ● ACTIVE |
Kopp Glass, INC. | Pittsburgh | 20–99 | ● ACTIVE |
Mcdanel Advanced Ceramic Technologies, LLC | Beaver Falls | — | ● ACTIVE |
| RMReed Minerals, LLC | Camp Hill | 20–99 | ● ACTIVE |
Schott Pharma Usa, INC. | Lebanon | 100–499 | ● ACTIVE |
Taktl LLC | Turtle Creek | — | ● ACTIVE |
Aa Abrasives, INC. | Philadelphia | — | ● ACTIVE |
Aero Aggregates of North America LLC | Crum Lynne | — | ● ACTIVE |
Ameri Tech Products, LLC | Bethel Park | — | ● ACTIVE |
Carmeuse Lime, INC. | Pittsburgh | — | ● ACTIVE |
| HPHanover Prest-paving Company | Hanover | — | ● ACTIVE |
Isoclima Specialty Glass LLC | East Butler | — | ● ACTIVE |
Kmz Enterprises LLC | Willow Grove | — | ● ACTIVE |
Lancaster Lime Works INC | Willow Street | — | ● ACTIVE |
Macinnis Group LLC | Roaring Spring | — | ● ACTIVE |
Magnet Applications, INC. | Dubois | — | ● ACTIVE |
Otb Materials CORP | New Freedom | — | ● ACTIVE |
Rfsj, INC | Mount Pleasnt | — | ● ACTIVE |
(rk)2 Materials, INC. | West Chester | — | ● ACTIVE |
Sbg Defense LLC | East Butler | — | ● ACTIVE |
Susmax INC | Philadelphia | — | ● ACTIVE |
Vitro Flat Glass LLC | Cheswick | — | ● ACTIVE |
| UCUniversal Concrete Prod Corp/stowe | Stowe | 100–499 | ◐ LIKELY ACTIVE |
Amrize Cement Inc/whitehall Plt | Whitehall | — | ◐ LIKELY ACTIVE |
| ACArmstrong Cement & Supply - Winfield | Cabot | — | ◐ LIKELY ACTIVE |