| LMLibrandis Mach Shop | Middletown | PA | Fabricated Metal Product Manufacturing332813 | 20-99 | ● ACTIVE |
| LBLion Brewery | Wilkes Barre | PA | Beverage and Tobacco Product Manufacturing312111 | 100-499 | ● ACTIVE |
| LHLittlestown Hdwr & Foundry | Littlestown | PA | Primary Metal Manufacturing331524 | 20-99 | ● ACTIVE |
Lockheed Martin Aeroparts, INC. | Johnstown | PA | Fabricated Metal Product Manufacturing332322 | 500+ | ● ACTIVE |
Lockheed Martin CORP | Archbald | PA | Fabricated Metal Product Manufacturing332117 | — | ● ACTIVE |
| LCLord CORP | Erie | PA | Textile Mills313320 | — | ● ACTIVE |
L.p. Aero Plastics, INC | Jeannette | PA | Plastics and Rubber Products Manufacturing326199 | — | ● ACTIVE |
| LPL & P Berwick Div Leggett & Platt/salem Twp | Berwick | PA | Plastics and Rubber Products Manufacturing326150 | 20-99 | ● ACTIVE |
Machined Products Company | Lancaster | PA | Fabricated Metal Product Manufacturing332721 | 20-99 | ● ACTIVE |
| MRMagnesita Refractories/york | York | PA | Food Manufacturing311119 | 100-499 | ● ACTIVE |
Maid Rite Specialty Foods INC | Dunmore | PA | Food Manufacturing311612 | — | ● ACTIVE |
Matthews International Corporation | Pittsburgh | PA | Primary Metal Manufacturing331523 | — | ● ACTIVE |
| MPMedical Products Laboratories, INC. | Philadelphia | PA | Chemical Manufacturing325412 | 100-499 | ● ACTIVE |
Meeco, INC. | Warrington | PA | Computer and Electronic Product Manufacturing334513 | 20-99 | ● ACTIVE |
| MWMellott Wood Preserving CO INC | Needmore | PA | Wood Product Manufacturing321114 | 20-99 | ● ACTIVE |
Microsonic, INC | Ambridge | PA | Machinery Manufacturing333248 | — | ● ACTIVE |
| MWMi Windows & Doors INC | Hegins | PA | Plastics and Rubber Products Manufacturing326199 | 100-499 | ● ACTIVE |
| MEMonroe Energy, LLC - Trainer Refinery | Trainer | PA | Petroleum and Coal Products Manufacturing324110 | 100-499 | ● ACTIVE |
Morgan Advanced Materials and Technology, INC. | Coudersport | PA | Electrical Equipment, Appliance & Component Manufacturing335991 | 100-499 | ● ACTIVE |
| MTMorgan Truck Body LLC | Morgantown | PA | Transportation Equipment Manufacturing336211 | 100-499 | ● ACTIVE |
Myers Emergency Power Systems LLC | Bethlehem | PA | Electrical Equipment, Appliance & Component Manufacturing335999 | 100-499 | ● ACTIVE |
Nammo Pocal INC | Scranton | PA | Fabricated Metal Product Manufacturing332721 | 20-99 | ● ACTIVE |
Nathan Trotter and Co., INC | Coatesville | PA | Primary Metal Manufacturing331491 | 20-99 | ● ACTIVE |
National Chemical Laboratories of Pa INC | Philadelphia | PA | Chemical Manufacturing325611 | 20-99 | ● ACTIVE |
National Magnetics Group, INC. | Bethlehem | PA | Nonmetallic Mineral Product Manufacturing327110 | 100-499 | ● ACTIVE |
| NCNeville Chemical Company | Pittsburgh | PA | Chemical Manufacturing325199 | 100-499 | ● ACTIVE |
| NSNew Standard CORP | York | PA | Fabricated Metal Product Manufacturing332116 | 100-499 | ● ACTIVE |
| NSNj Shell Casting Corp/ Marietta | Marietta | PA | Primary Metal Manufacturing331511 | 1-19 | ● ACTIVE |
Noble Biomaterials INC | Scranton | PA | Textile Mills313320 | 100-499 | ● ACTIVE |
Northeast Industrial Manufacturing, INC. | Greenville | PA | Fabricated Metal Product Manufacturing332312 | 20-99 | ● ACTIVE |
| NPNortheast Prestressed Prod LLC | Cressona | PA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ● ACTIVE |
Oakworks INC | New Freedom | PA | Furniture and Related Product Manufacturing337121 | 20-99 | ● ACTIVE |
Oberg Industries LLC | Freeport | PA | Fabricated Metal Product Manufacturing332710 | 100-499 | ● ACTIVE |
| OUOpta USA Inc/opta Myoma Plt | Mars | PA | Nonmetallic Mineral Product Manufacturing327992 | 1-19 | ● ACTIVE |
Orasure Technologies INC | Bethlehem | PA | Chemical Manufacturing325413 | 100-499 | ● ACTIVE |
P. A. Hutchison Company LLC | Mayfield | PA | Printing and Related Support Activities323117 | — | ● ACTIVE |
| PIPalmer Intl INC | Skippack | PA | Chemical Manufacturing325211 | 20-99 | ● ACTIVE |
| PHPapetti's Hygrade Egg Products INC | Klingerstown | PA | Food Manufacturing311612 | 100-499 | ● ACTIVE |
PC Systems, INC | Ridgway | PA | Electrical Equipment, Appliance & Component Manufacturing335929 | 20-99 | ● ACTIVE |
| PCPecora CORP | Harleysville | PA | Chemical Manufacturing325520 | 20-99 | ● ACTIVE |
Penflex CORP | Gilbertsville | PA | Fabricated Metal Product Manufacturing332710 | 20-99 | ● ACTIVE |
Penn Engineering & Manufacturing CORP | Danboro | PA | Fabricated Metal Product Manufacturing332722 | 100-499 | ● ACTIVE |
| PAPennex Aluminum CO | Wellsville | PA | Primary Metal Manufacturing331314 | 100-499 | ● ACTIVE |
Penn Pallet INC | Saint Marys | PA | Wood Product Manufacturing321920 | 20-99 | ● ACTIVE |
Penn United Technologies INC | Cabot | PA | Fabricated Metal Product Manufacturing332710 | 100-499 | ● ACTIVE |
Peters Heat Treating INC | Meadville | PA | Fabricated Metal Product Manufacturing332811 | 20-99 | ● ACTIVE |
| PUPhilips Ultrasound INC | Reedsville | PA | Computer and Electronic Product Manufacturing334510 | — | ● ACTIVE |
Phoenix Lithographing Corporation | Philadelphia | PA | Printing and Related Support Activities323111 | 100-499 | ● ACTIVE |
| PIPhytogenx, INC | Morgantown | PA | Chemical Manufacturing325620 | 100-499 | ● ACTIVE |
| PRPik Rite INC | Lewisburg | PA | Fabricated Metal Product Manufacturing332420 | 100-499 | ● ACTIVE |