| HPHarmar Plt | Cheswick | PA | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| HCHarmony Cleaners & Alterations | Harmony | PA | Machinery Manufacturing333318 | — | ◇ UNVERIFIED |
| HCHarsco CO. Heckett Div. Plant 15 | Morrisville | PA | Petroleum and Coal Products Manufacturing324122 | — | ◇ UNVERIFIED |
| HCHarsco Corp/east Stroudsburg Plt | East Stroudsburg | PA | Fabricated Metal Product Manufacturing332410 | — | ◇ UNVERIFIED |
| HMHarsco Metals - Coatesville | Coatesville | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| HMHarsco Metals - Natrona Facility - Gate 10 | Natrona Heights | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| HRHawbaker Recycling Center Stormwater Pag-03 | State College | PA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| HCHazleton Casting CO | Hazleton | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| HCHazleton Casting CO Llc/hazleton | Hazleton | PA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| HCHbc Chemical INC. | Philadelphia | PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| HIH-b Instrument/bel Art Products INC | Trappe | PA | Computer and Electronic Product Manufacturing334513 | — | ◇ UNVERIFIED |
| HIHeatron INC | Erie | PA | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| HPHeckett Plant #21 | Natrona Heights | PA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| HCHeekin Can Incorporated | Pittsburgh | PA | Fabricated Metal Product Manufacturing332431 | — | ◇ UNVERIFIED |
| HPHegins Precision Division | Hegins | PA | Miscellaneous Manufacturing339920 | — | ◇ UNVERIFIED |
| HMHeidelberg Materials Ne Llc/torrance Quarry | Blairsville | PA | Machinery Manufacturing333613 | — | ◇ UNVERIFIED |
| HCHenry Co/kimberton Plt | Kimberton | PA | Petroleum and Coal Products Manufacturing324122 | — | ◇ UNVERIFIED |
| HEHeraeus Electro Nite | Ellwood City | PA | Computer and Electronic Product Manufacturing334513 | — | ◇ UNVERIFIED |
| HPHercon Pharmaceuticals LLC | Emigsville | PA | Textile Mills313320 | — | ◇ UNVERIFIED |
| HPHercon Pharm Llc/emigsville | Emigsville | PA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| HAHeritage Auto Body | New London | PA | Food Manufacturing311800 | — | ◇ UNVERIFIED |
| HIHerley Industries LLC (a Caes LLC Business) | Lancaster | PA | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| HCHerr-voss Corporation-office Basement | Callery | PA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| HFHershey Foods Corp/technical Center | Hershey | PA | Food Manufacturing311352 | — | ◇ UNVERIFIED |
| HLHershey Laundry-dry Cleaners | Hershey | PA | Fabricated Metal Product Manufacturing332410 | — | ◇ UNVERIFIED |
| HLHickman Lumber Co/emlenton | Emlenton | PA | Wood Product Manufacturing321912 | — | ◇ UNVERIFIED |
| HFHighland Field Services LLC | Blossburg | PA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| HMHighway Materials INC - Nazareth | Nazareth | PA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| HPHilex Poly CO LLC | Milesburg | PA | Paper Manufacturing322220 | — | ◇ UNVERIFIED |
| HFHillandale Feed Mill | Gettysburg | PA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| HLHimedia Laboratories LLC | Lincoln University | PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
 Hitachi Energy Usa, INC. | Mt. Pleasant | PA | Electrical Equipment, Appliance & Component Manufacturing335313 | — | ◇ UNVERIFIED |
| HPHi-tech Plating | Erie | PA | Primary Metal Manufacturing331112 | — | ◇ UNVERIFIED |
| HJH J Heinz Chef Francisco | King of Prussia | PA | Food Manufacturing311412 | — | ◇ UNVERIFIED |
| HMHoltec Manufacturing | Turtle Creek | PA | Fabricated Metal Product Manufacturing332420 | — | ◇ UNVERIFIED |
| HWHoly Water Solutions, LLC D/b/a Zero Hazard | Lewisberry | PA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| HCHomette Corp/skyline Homes Ephrata | Ephrata | PA | Wood Product Manufacturing321991 | — | ◇ UNVERIFIED |
| HIHoneywell Intl / Delaware Plt | Marcus Hook | PA | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| HPHood Packaging Corp/hazleton | Hazle Township | PA | Paper Manufacturing322220 | — | ◇ UNVERIFIED |
| HCHoover Conveyor & Fab/meyersdale | Meyersdale | PA | Machinery Manufacturing333922 | — | ◇ UNVERIFIED |
| HRHorgan Recycling Inc/west Point | West Point | PA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| HZHorsehead Zinc Powders LLC | Monaca | PA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| HIHoughton International INC | Norristown | PA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| HIHoughton Intl | Allentown | PA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| HHHp Hood Llc/philadelphia | Phila | PA | Food Manufacturing311511 | — | ◇ UNVERIFIED |
| HBHri Brookville Asphalt Plt | Brookville | PA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| HIHri Inc/brookville Hma Plt 109 | Brookville | PA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| HIHri INC Johnstown Hma Plt | Johnstown | PA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| HAHunt Auto Body/fairless Hills | Fairless Hills | PA | Food Manufacturing311420 | — | ◇ UNVERIFIED |
| HEHuntingdon Elec Motor Svc Inc/7th & Penn Huntingdon | Huntingdon | PA | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
