| 1 | Abc Rent-a-car, Inc.Not reported | Corporation | Not reported | Not reported |
| 2 | A. and L. Auto Parts, Inc.Not reported | Corporation | Not reported | Not reported |
| 3 | Aldo, Inc.Not reported | Corporation | Not reported | Not reported |
| 4 | Area Oil Company,inc.Not reported | Corporation | Not reported | Not reported |
| 5 | B & B Aviation, Inc.Not reported | Corporation | Not reported | Not reported |
| 6 | B and Y, Inc.Not reported | Corporation | Not reported | Not reported |
| 7 | Bisch Industries IncorporatedNot reported | Corporation | Not reported | Not reported |
| 8 | Blakely Ceramic Studio and Supply, Inc.Not reported | Corporation | Not reported | Not reported |
| 9 | Breakneck Eagle ClubNot reported | Nonprofit | Not reported | Not reported |
| 10 | Brown's Lane, Inc.Not reported | Corporation | Not reported | Not reported |
| 11 | William J. Brown Trucking, Inc.Not reported | Corporation | Not reported | Not reported |
| 12 | Butler Tire & Supply CoNot reported | Corporation | Not reported | Not reported |
| 13 | Camel Alloy CompanyNot reported | Corporation | Not reported | Not reported |
| 14 | Colonello, Inc.Not reported | Corporation | Not reported | Not reported |
| 15 | Council of Indpendent Business (c. I. B.)Not reported | Nonprofit | Not reported | Not reported |
| 16 | Davison Manufacturing Co., Inc.Not reported | Corporation | Not reported | Not reported |
| 17 | Drive-in Auto-mart, Inc., a Close CorporationNot reported | Corporation | Not reported | Not reported |
| 18 | Grouch, Inc.Not reported | Corporation | Not reported | Not reported |
| 19 | Edwob Industries, Inc.Not reported | Corporation | Not reported | Not reported |
| 20 | Equity Systems CorporationNot reported | Corporation | Not reported | Not reported |
| 21 | Ferree, Roy E., Inc.Not reported | Corporation | Not reported | Not reported |
| 22 | 5001 William Flynn Highway, Inc.Not reported | Corporation | Not reported | Not reported |
| 23 | Forward Investment and Real Estate CoNot reported | Corporation | Not reported | Not reported |
| 24 | Ram Electric, Inc.Not reported | Corporation | Not reported | Not reported |
| 25 | Gateway Kitchen Equipment and Supplies, Inc.Not reported | Corporation | Not reported | Not reported |
| 26 | Glycolator Manufacturing CompanyNot reported | Corporation | Not reported | Not reported |
| 27 | Graham's Nursing Home, Inc.Not reported | Corporation | Not reported | Not reported |
| 28 | Hammerheld, Inc.Not reported | Corporation | Not reported | Not reported |
| 29 | Hat Tree, Inc.Not reported | Corporation | Not reported | Not reported |
| 30 | Hot-top Stables, Inc.Not reported | Corporation | Not reported | Not reported |
| 31 | Irwin, Floyd T., Inc.Not reported | Corporation | Not reported | Not reported |
| 32 | Vernon C. Kaufman & Son, Inc.Not reported | Corporation | Not reported | Not reported |
| 33 | Kennihan, H P & Sons IncNot reported | Corporation | Not reported | Not reported |
| 34 | Keystone Polled Hereford Sale AssociationNot reported | Nonprofit | Not reported | Not reported |
| 35 | The Kiwanis Club of SewickleyNot reported | Nonprofit | Not reported | Not reported |
| 36 | Kurtain CorporationNot reported | Corporation | Not reported | Not reported |
| 37 | Ladies Auxiliary of Middlesex Township Volunteer Fire Company and Relief AssociationNot reported | Nonprofit | Not reported | Not reported |
| 38 | Leslie Distributor, Inc.Not reported | Corporation | Not reported | Not reported |
| 39 | Lipo Farms, Inc.Not reported | Corporation | Not reported | Not reported |
| 40 | J. W. Marshall, Inc.Not reported | Corporation | Not reported | Not reported |
| 41 | Middlesex Action CouncilNot reported | Nonprofit | Not reported | Not reported |
| 42 | Middlesex Development Company, Inc.Not reported | Corporation | Not reported | Not reported |
| 43 | Middlesex Township Volunteer Fire CompanyNot reported | Nonprofit | Not reported | Not reported |
| 44 | North Pittsburgh Secretarial Service Co.Not reported | Corporation | Not reported | Not reported |
| 45 | North Suburban Fine Arts League, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 46 | Park Products, Inc.Not reported | Corporation | Not reported | Not reported |
| 47 | Paul & Ann's Bowl-a-way, Inc.Not reported | Corporation | Not reported | Not reported |
| 48 | Pittsburgh Printing Supplies CompanyNot reported | Corporation | Not reported | Not reported |
| 49 | Polcsak Auto Repair and Towing Service, Inc.Not reported | Corporation | Not reported | Not reported |
| 50 | Pool King, Inc.Not reported | Corporation | Not reported | Not reported |