| AIArcos Industries LLC | Mount Carmel | 20–99 | ● ACTIVE |
| BABristol Aluminum CO | Levittown | 20–99 | ● ACTIVE |
| CPCleveland-cliffs Plate LLC | Coatesville | 500+ | ● ACTIVE |
Donsco, INC. | Wrightsville | — | ● ACTIVE |
Effort Foundry, INC. | Bath | — | ● ACTIVE |
| EQEllwood Quality Steels Company | New Castle | 100–499 | ● ACTIVE |
| EMEpic Metals CORP | Braddock | — | ● ACTIVE |
Franklin Bronze Plaques, INC. | Franklin | 20–99 | ● ACTIVE |
Global Advanced Metals USA INC | Boyertown | 100–499 | ● ACTIVE |
Grand Valley Manufacturing CO | Titusville | — | ● ACTIVE |
Grant Manufacturing & Alloying INC | Birdsboro | — | ● ACTIVE |
| HTHighland Tank, LLC (Stoystown, PA) | Stoystown | 100–499 | ● ACTIVE |
Hygrade Metal Moulding Manufacturing CORP. | Bethlehem | — | ● ACTIVE |
| JMJohnson Matthey INC. | West Chester | 100–499 | ● ACTIVE |
| LMLangeloth Metallurgical Company LLC | Langeloth | 20–99 | ● ACTIVE |
Luxfer Magtech INC | Saxonburg | — | ● ACTIVE |
Metalwerks, INC. | Aliquippa | — | ● ACTIVE |
| MRMountain Ridge Metals INC | Millersburg | 100–499 | ● ACTIVE |
North American Hoganas Company | Hollsopple | — | ● ACTIVE |
Perryman CO | Houston | — | ● ACTIVE |
Phb INC | Fairview | — | ● ACTIVE |
| PMPrecision Marshall Steel | Washington | 20–99 | ● ACTIVE |
Prl Industries INC | Lebanon | 100–499 | ● ACTIVE |
| RAReading Alloys, LLC | Robesonia | 100–499 | ● ACTIVE |
Scicast International Incorporated | Bechtelsville | 20–99 | ● ACTIVE |
St Products LLC | Duncansville | — | ● ACTIVE |
Wire and Cable Specialties, INC. | Coatesville | — | ● ACTIVE |
Wirerope Works, INC. | Williamsport | — | ● ACTIVE |
Alleima USA LLC | South Abington Township | — | ● ACTIVE |
Americas Rare Earth CORP | Pittston | — | ● ACTIVE |
Amg Critical Materials CORP. | Wayne | — | ● ACTIVE |
Ampal INC. | Palmerton | — | ● ACTIVE |
Arconic Corporation | Pittsburgh | — | ● ACTIVE |
Ati Flat Rolled Products Holdings, LLC | Pittsburgh | — | ● ACTIVE |
Ati Specialty Alloys & Components, LLC | Pittsburgh | — | ● ACTIVE |
Ati Specialty Materials LLC | Pittsburgh | — | ● ACTIVE |
Bolton Metal Products CO. INC. | State College | — | ● ACTIVE |
Carpenter Technology Corporation | Philadelphia | — | ● ACTIVE |
Carter Alloys Company | Bryn Mawr | — | ● ACTIVE |
Cavalier Steel & Fence CO | Darby | — | ● ACTIVE |
Evolution Metals and Mining Technologies, LLC | Haverford | — | ● ACTIVE |
Hegedus Aluminum Industries, INC | Oil City | — | ● ACTIVE |
Hrp Metals, INC. | Burgettstown | — | ● ACTIVE |
Ice Station Zebra, LLC | Canonsburg | — | ● ACTIVE |
| JAJudson A. Smith Company | Boyertwon | 20–99 | ● ACTIVE |
Kapp Alloy & Wire, INC | Oil City | — | ● ACTIVE |
Lifezone Recycling US LLC | Fairview | — | ● ACTIVE |
North American Hoganas High Alloys LLC | Johnstown | — | ● ACTIVE |
| PAPa94 Ametek-hamilton Precision Metals | Lancaster | 20–99 | ● ACTIVE |
Pennsylvania Precision Cast Parts INC | Lebanon | — | ● ACTIVE |