| NJNew Jersey Boom & Erectors | Henryville | — | ◇ UNVERIFIED |
| OCOld Castle Building Envelope | Bloomsburg | — | ◇ UNVERIFIED |
| OMO'neal Manufacturing Services | Ambridge | — | ◇ UNVERIFIED |
| PEPa Equipment Rental | Turtle Creek | — | ◇ UNVERIFIED |
| PMPatriot Metal Products INC. | Berwick | — | ◇ UNVERIFIED |
| PSPennsylvania Sintered Metals INC | Emporium | — | ◇ UNVERIFIED |
| PMPhoenix Metals of Pennsylvania, INC. | Butler | — | ◇ UNVERIFIED |
| PFPittsburgh Flatroll Company | Pittsburgh | — | ◇ UNVERIFIED |
| PMPocono Metal INC. | Bangor | — | ◇ UNVERIFIED |
| PSPrecison Steel Services, INC. | Farrell | — | ◇ UNVERIFIED |
| PMPrenatt Manufacturing, INC. | Pleasantville | — | ◇ UNVERIFIED |
 Prl Industries INC | Lebanon | — | ◇ UNVERIFIED |
| PMPsc Metals, INC. | Koppel | — | ◇ UNVERIFIED |
| RIRansom Ind Lp/macungie | Macungie | — | ◇ UNVERIFIED |
| RMRitchey Metals/scenery Hill | Scenery Hill | — | ◇ UNVERIFIED |
| RFRoll Former Corporation | Chalfont | — | ◇ UNVERIFIED |
| RTRolling, Tank and Fabrication Inc | Eighty Four | — | ◇ UNVERIFIED |
| RQRoyer Quality Castings, Incorporated | Boyertown | — | ◇ UNVERIFIED |
| STSalem Tube Inc/greenville Reynolds Ind Pk | Greenville | — | ◇ UNVERIFIED |
| SGSamuel Grossi & Sons, INC. | Bensalem | — | ◇ UNVERIFIED |
| SBSbc Building Systems, LLC. | Ambridge | — | ◇ UNVERIFIED |
| SGSeibu Giken America, Incorporation | Wyomissing | — | ◇ UNVERIFIED |
| SCSeybert Castings, INC. | Huntingdon Valley | — | ◇ UNVERIFIED |
| SAShepherd Aluminum Inc | Hanover | — | ◇ UNVERIFIED |
| SISinnott Industries, INC. | Philadelphia | — | ◇ UNVERIFIED |
| SLSmoyer L M Brass Products, INC. | Bethlehem | — | ◇ UNVERIFIED |
| SSSovereign Steel Manufacturing, LLC | Allentown | — | ◇ UNVERIFIED |
| SSStation Steel Services, Inc | Milford | — | ◇ UNVERIFIED |
| SBSuperior Bronze CORP | Erie | — | ◇ UNVERIFIED |
| SMSupreme Manufacutring, INC. | Stoneboro | — | ◇ UNVERIFIED |
| SSSusini Specialty Steels, INC. | Natrona Heights | — | ◇ UNVERIFIED |
| SBSussman Brothers Recycling | Allentown | — | ◇ UNVERIFIED |
| SSSwedish Steel | Pittsburgh | — | ◇ UNVERIFIED |
| TMTalley Metals, INC. | Hermitage | — | ◇ UNVERIFIED |
| TWTatano Wire and Steel | Canonsburg | — | ◇ UNVERIFIED |
| TWTaylor Winefield Corporation | Verona | — | ◇ UNVERIFIED |
| TTTech Tube Inc/upper Merion | King of Prussia | — | ◇ UNVERIFIED |
| TATemple Aluminum Foundry, Incorporated | Blandon | — | ◇ UNVERIFIED |
| TMTitanium Metals Corporation | Exton | — | ◇ UNVERIFIED |
| TKTmk-ipsco Koppel Tubulars, LLC | Ambridge | — | ◇ UNVERIFIED |
| TLTmk-ipsco, LLC. | Ambridge | — | ◇ UNVERIFIED |
| TMT M P Refining Corporation | Malvern | — | ◇ UNVERIFIED |
| TToolmax | Latrobe | — | ◇ UNVERIFIED |
| TDTri-vet Design and Fabrication, LLC | Shenandoah | — | ◇ UNVERIFIED |
| TPTsk Partners, INC. | Erie | — | ◇ UNVERIFIED |
| UAUf Acquisitions, INC. | Johnstown | — | ◇ UNVERIFIED |
| UEUnion Electric Akers | Avonmore | — | ◇ UNVERIFIED |
| USUnited States Steel Corporation | Braddock | — | ◇ UNVERIFIED |
| UWUSA Waste (monroeville Landfill) | Monroeville | — | ◇ UNVERIFIED |
| UOUsdol Osha | Palmerton | — | ◇ UNVERIFIED |
