Systech Design INC. | Exton | PA | Machinery Manufacturing333413 | 1-19 | ◐ LIKELY ACTIVE |
| TTTapco Tube Co/meadville | Meadville | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| TWT.b. Wood's INC. | Chambersburg | PA | Machinery Manufacturing333613 | 100-499 | ◐ LIKELY ACTIVE |
Tci Mobility, LLC | Sciota | PA | Transportation Equipment Manufacturing336211 | 1-19 | ◐ LIKELY ACTIVE |
| TATechnical Applications INC | Broomall | PA | Electrical Equipment, Appliance & Component Manufacturing335314 | 1-19 | ◐ LIKELY ACTIVE |
| TUTecniplast Usa, INC. | West Chester | PA | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| TWTedd Wood LLC | Mifflintown | PA | Furniture and Related Product Manufacturing337110 | 100-499 | ◐ LIKELY ACTIVE |
| TDTegrant Diversified Brands INC | Montgomeryville | PA | Plastics and Rubber Products Manufacturing326150 | — | ◐ LIKELY ACTIVE |
| TFTeledyne Flir Defense INC | Freeport | PA | Nonmetallic Mineral Product Manufacturing327215 | — | ◐ LIKELY ACTIVE |
| TPTempur Production USA LLC Dba Mountain Top Foam/wright Twp | Mountain Top | PA | Plastics and Rubber Products Manufacturing326299 | — | ◐ LIKELY ACTIVE |
| TATessy Automation LLC | Meadville | PA | Machinery Manufacturing333249 | 20-99 | ◐ LIKELY ACTIVE |
| TCThe Closet Works, Inc. | Montgomeryville | PA | Furniture and Related Product Manufacturing337215 | 20-99 | ◐ LIKELY ACTIVE |
The Coffee Tree Roasters Corporation | West Mifflin | PA | Food Manufacturing311920 | 20-99 | ◐ LIKELY ACTIVE |
| TEThe Esab Group, INC. | Hanover | PA | Primary Metal Manufacturing331491 | — | ◐ LIKELY ACTIVE |
| TFThe Fredericks Company, INC. | Huntingdon Valley | PA | Nonmetallic Mineral Product Manufacturing327215 | 20-99 | ◐ LIKELY ACTIVE |
| TTThermal Transfer CORP | Duquesne | PA | Fabricated Metal Product Manufacturing332410 | — | ◐ LIKELY ACTIVE |
| TSThe Sherwin Williams Co/rochester Plt | Rochester | PA | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| TWThe Winery at Wyndridge Farm | Dallastown | PA | Beverage and Tobacco Product Manufacturing312130 | 20-99 | ◐ LIKELY ACTIVE |
| TFThompson Fabrication, LLC | Wheatland | PA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| TITimberlane, Inc. | Montgomeryville | PA | Wood Product Manufacturing321911 | 20-99 | ◐ LIKELY ACTIVE |
| TMTitanium Metals CORP Dba Timet | Morgantown | PA | Primary Metal Manufacturing331410 | — | ◐ LIKELY ACTIVE |
| TITms International Llc/new Castle Plant | New Castle | PA | Nonmetallic Mineral Product Manufacturing327999 | — | ◐ LIKELY ACTIVE |
Tnt Handling USA INC | West Chester | PA | Machinery Manufacturing333923 | 1-19 | ◐ LIKELY ACTIVE |
| TMTonnard Manufacturing CORP | Corry | PA | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
| TIToppan Interamerica Inc/caernarvon | Morgantown | PA | Paper Manufacturing322222 | — | ◐ LIKELY ACTIVE |
| TPTreehouse Private Brands | Hanover | PA | Food Manufacturing311821 | 100-499 | ◐ LIKELY ACTIVE |
| TITrion Industries, Inc | Wilkes Barre | PA | Fabricated Metal Product Manufacturing332618 | 100-499 | ◐ LIKELY ACTIVE |
| TATruck Accessories Npdes Stormwater | Milton | PA | Plastics and Rubber Products Manufacturing326199 | — | ◐ LIKELY ACTIVE |
| THTuscarora Hardwoods, Inc. | Elliottsburg | PA | Wood Product Manufacturing321113 | 20-99 | ◐ LIKELY ACTIVE |
| TATYK America | Clairton | PA | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| USUfp Stockertown LLC | Stockertown | PA | Wood Product Manufacturing321114 | — | ◐ LIKELY ACTIVE |
| UPUltra Poly CORP - Bloomsburg Plant | Bloomsburg | PA | Textile Product Mills314110 | — | ◐ LIKELY ACTIVE |
| UCUnicast Co/boyertown | Boyertown | PA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| UEUnion Electric Steel CORP | Burgettstown | PA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
| UEUnison Engine Components Mountaintop | Mountain Top | PA | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| URUnited Refining Co/warren Plt | Warren | PA | Petroleum and Coal Products Manufacturing324110 | — | ◐ LIKELY ACTIVE |
| UUUnivar USA INC - Bunola Facility | Bunola | PA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| USUniversal Stainless & Alloy Prod/prp Division | Titusville | PA | Petroleum and Coal Products Manufacturing324199 | — | ◐ LIKELY ACTIVE |
| UFUrick Foundry Co/erie | Erie | PA | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| UPUSA Pork Packers Incorporated | Hazleton | PA | Food Manufacturing311611 | — | ◐ LIKELY ACTIVE |
| UAUS Army Tobyhanna Army Depot | Tobyhanna | PA | Paper Manufacturing322122 | — | ◐ LIKELY ACTIVE |
| UBUS Boiler INC | Lancaster | PA | Fabricated Metal Product Manufacturing332410 | 100-499 | ◐ LIKELY ACTIVE |
| UCUss Corp/edgar Thomson Works | Braddock | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| UMUss Mon Valley Works - Irvin Plant | West Mifflin | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| USUS Steel Fairless Hills Works | Fairless Hills | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| USUS Steel Mon Valley Works - Clairton Plant | Clairton | PA | Petroleum and Coal Products Manufacturing324110 | — | ◐ LIKELY ACTIVE |
| UQUtz Quality Foods INC | Hanover | PA | Food Manufacturing311919 | 500+ | ◐ LIKELY ACTIVE |
| VIVerichem INC | Pittsburgh | PA | Chemical Manufacturing325320 | — | ◐ LIKELY ACTIVE |
| VVibroplating | Bensalem | PA | Fabricated Metal Product Manufacturing332813 | 1-19 | ◐ LIKELY ACTIVE |
| VCVictaulic Company/alburtis Facility | Alburtis | PA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |