| 1 | A C Service IncNot reported | Corporation | Not reported | Not reported |
| 2 | A.k.d. Printing CompanyNot reported | Corporation | Not reported | Not reported |
| 3 | Ams Systems, Inc.Not reported | Corporation | Not reported | Not reported |
| 4 | A-1 Iron & Metals Co., Inc.Not reported | Corporation | Not reported | Not reported |
| 5 | A-1 Signs IncNot reported | Corporation | Not reported | Not reported |
| 6 | Apl Inc.Not reported | Corporation | Not reported | Not reported |
| 7 | Abbeycraft CompanyNot reported | Corporation | Not reported | Not reported |
| 8 | Abbott Development CorporationNot reported | Corporation | Not reported | Not reported |
| 9 | Abel Recycling, Inc.Not reported | Corporation | Not reported | Not reported |
| 10 | Able Beer CoNot reported | Corporation | Not reported | Not reported |
| 11 | Accu-form, Inc.Not reported | Corporation | Not reported | Not reported |
| 12 | Acme Fuel CompanyNot reported | Corporation | Not reported | Not reported |
| 13 | Acorn Plastic Engineers IncNot reported | Corporation | Not reported | Not reported |
| 14 | Act CenterNot reported | Nonprofit | Not reported | Not reported |
| 15 | Actuarial and Pension Services, Inc.Not reported | Corporation | Not reported | Not reported |
| 16 | Adam Industrial Distributors, Inc.Not reported | Corporation | Not reported | Not reported |
| 17 | Norm Adams Inc.Not reported | Corporation | Not reported | Not reported |
| 18 | Adams & Streuber CompanyNot reported | Corporation | Not reported | Not reported |
| 19 | Admiral Construction CorpNot reported | Corporation | Not reported | Not reported |
| 20 | Admiral Perry Obedience Training Club, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 21 | Adrian IncNot reported | Corporation | Not reported | Not reported |
| 22 | Advance Printing & Litho CoNot reported | Corporation | Not reported | Not reported |
| 23 | Advanced Local Insurance Agents AssociationNot reported | Nonprofit | Not reported | Not reported |
| 24 | The Advisory Board of the Behrend Center of the Pennsylvania State UniversityNot reported | Nonprofit | Not reported | Not reported |
| 25 | Aerial Electric Inc.Not reported | Corporation | Not reported | Not reported |
| 26 | Aerial Products CorporationNot reported | Corporation | Not reported | Not reported |
| 27 | Aetna Placement Service, Inc.Not reported | Corporation | Not reported | Not reported |
| 28 | The Afro-american Congress, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 29 | John S. Agnello & Son, Inc.Not reported | Corporation | Not reported | Not reported |
| 30 | Ahl, IncorporatedNot reported | Corporation | Not reported | Not reported |
| 31 | J C Ainsworth Doc State Park Lifeguard AssociationNot reported | Nonprofit | Not reported | Not reported |
| 32 | Air-con, Inc.Not reported | Corporation | Not reported | Not reported |
| 33 | Airport Mobile Leasing, Inc.Not reported | Corporation | Not reported | Not reported |
| 34 | Airport Village Development Corp., Inc.Not reported | Corporation | Not reported | Not reported |
| 35 | Consumers Lumber IncNot reported | Corporation | Not reported | Not reported |
| 36 | Telestereo, Inc.Not reported | Corporation | Not reported | Not reported |
| 37 | Ajax Ready Mix Concrete CorpNot reported | Corporation | Not reported | Not reported |
| 38 | Akdar Sales and Service IncNot reported | Corporation | Not reported | Not reported |
| 39 | Al-case, Inc.Not reported | Corporation | Not reported | Not reported |
| 40 | Alcanon ClubNot reported | Nonprofit | Not reported | Not reported |
| 41 | Alcar Precision Tool, Inc.Not reported | Corporation | Not reported | Not reported |
| 42 | Alco Aluminum CorpNot reported | Corporation | Not reported | Not reported |
| 43 | Alco Home Modernization IncNot reported | Corporation | Not reported | Not reported |
| 44 | Alexander Courts, Inc.Not reported | Corporation | Not reported | Not reported |
| 45 | Salt Creek Construction CorporationNot reported | Corporation | Not reported | Not reported |
| 46 | All-weather Enclosures, Inc.Not reported | Corporation | Not reported | Not reported |
| 47 | Allas Metal Products IncNot reported | Corporation | Not reported | Not reported |
| 48 | Allburn Florists IncNot reported | Corporation | Not reported | Not reported |
| 49 | Allburn, James Jr., Inc.Not reported | Corporation | Not reported | Not reported |
| 50 | Allegheny Agencies, Inc.Not reported | Corporation | Not reported | Not reported |