| RTReading Truck Body, LLC | Reading | 500+ | ◐ LIKELY ACTIVE |
| AIAmer Ind | Sharon | — | ◐ LIKELY ACTIVE |
| BTBwise Trailers | Chambersburg | — | ◐ LIKELY ACTIVE |
| CCCheetah Chassis CORP | Berwick | 100–499 | ◐ LIKELY ACTIVE |
| CSCurry Supply Co/hollidaysburg | Hollidaysburg | 100–499 | ◐ LIKELY ACTIVE |
| DDDana Driveshaft Prod Llc/pottstown | Pottstown | — | ◐ LIKELY ACTIVE |
| DMDor Mae Industries INC | Reading | 20–99 | ◐ LIKELY ACTIVE |
| HMHarley-davidson Motor CO Operations INC | York | — | ◐ LIKELY ACTIVE |
| JEJeraco Enterprises Inc/milton Plt | Milton | — | ◐ LIKELY ACTIVE |
| JMJohnson Matthey INC | Smithfield | — | ◐ LIKELY ACTIVE |
| JMJohnson Matthey - Wayne Plt | Wayne | — | ◐ LIKELY ACTIVE |
| LRLoad Rite Trailers INC | Fairless Hills | 100–499 | ◐ LIKELY ACTIVE |
| LCLord Corp/erie | Erie | 500+ | ◐ LIKELY ACTIVE |
| LELycoming Engines/oliver St Plt | Williamsport | — | ◐ LIKELY ACTIVE |
| MTMack Trucks Inc/macungie | Macungie | — | ◐ LIKELY ACTIVE |
| MIMgs Inc/const Denver | Denver | — | ◐ LIKELY ACTIVE |
| PMPenn Machine CO INC | Johnstown | 20–99 | ◐ LIKELY ACTIVE |
| PWPratt & Whitney Amercon Div United Tech Corp/middletown | Middletown | — | ◐ LIKELY ACTIVE |
| SVSpecialized Vehicles Corp/montgomery Plt | Montgomery | — | ◐ LIKELY ACTIVE |
| UEUnison Engine Components Mountaintop | Mountain Top | — | ◐ LIKELY ACTIVE |
| JPJones Performance Pr/west Middlesex | West Middlesex | — | ◐ LIKELY ACTIVE |
| 4G4 Guys INC | Meyersdale | — | ◇ UNVERIFIED |
| GTGe Transportation Emporium Facility | Emporium | — | ◇ UNVERIFIED |
| GDGreat Dane Trailers | Elysburg | — | ◇ UNVERIFIED |
| WCWells Cargo/carbondale Plt | Carbondale | — | ◇ UNVERIFIED |
| WGWyman Gordon Tru-form | Wilkes Barre | — | ◇ UNVERIFIED |
Mobile Concepts Specialty Vehicles INC | Mount Pleasant | — | ◐ LIKELY ACTIVE |
| ACAmerican Cargo Group Trailers LLC | Mcadoo | 20–99 | ◐ LIKELY ACTIVE |
| ASA. Stucki Company Dba American Industries | Sharon | 20–99 | ◐ LIKELY ACTIVE |
| ASA. Stucki dba Independent Draft Gear | Farrell | 1–19 | ◐ LIKELY ACTIVE |
| ATAtlantic Track & Turnout CO. | Saint Clair | 20–99 | ◐ LIKELY ACTIVE |
| BSBissinger & Stein,inc. | Kulpsville | 20–99 | ◐ LIKELY ACTIVE |
| BIBoeing Integrated Defense Systems Group Rototcraft | Ridley Park | — | ◐ LIKELY ACTIVE |
| BCBolsan CO Inc/eighty Four | Eighty Four | — | ◐ LIKELY ACTIVE |
| CCCheetah Chassis Corp/berwick Plt | Berwick | — | ◐ LIKELY ACTIVE |
| DIDudlik Industries INC. | Hatboro | — | ◐ LIKELY ACTIVE |
| EMEastern Manufacturing LLC | Montgomery | 20–99 | ◐ LIKELY ACTIVE |
| EGElysburg Gd Llc/elysburg Plt | Elysburg | — | ◐ LIKELY ACTIVE |
| GDGeneral Dynamics Land Systems INC | Eynon | — | ◐ LIKELY ACTIVE |
| JAJ. A. Reinhardt & Co., INC. | Mountainhome | — | ◐ LIKELY ACTIVE |
| JMJohnson Matthey, INC. | Wayne | 500+ | ◐ LIKELY ACTIVE |
| KRKasgro Rail/taylor Twp | New Castle | — | ◐ LIKELY ACTIVE |
| MCMcneilus Co/morgantown Truck Serv Facili | Morgantown | — | ◐ LIKELY ACTIVE |
| MMMetro Machine CORP | Philadelphia | — | ◐ LIKELY ACTIVE |
| MTMorgan Truck Body Ephrata | Ephrata | — | ◐ LIKELY ACTIVE |
| NSNorfolk Southern Railway Company | Altoona | — | ◐ LIKELY ACTIVE |
| NLNovae LLC | Mountain Top | 20–99 | ◐ LIKELY ACTIVE |
| PMPenn Machine Company LLC PLG | Blairsville | 1–19 | ◐ LIKELY ACTIVE |
| RCRalmark Company | Larksville | 20–99 | ◐ LIKELY ACTIVE |
| RBReading Body Works INC. | Reading | — | ◐ LIKELY ACTIVE |