| 1 | A-z Dairy Stores IncNot reported | Corporation | Not reported | Not reported |
| 2 | Climate Services, Inc.Not reported | Corporation | Not reported | Not reported |
| 3 | Advertisers Reproductions, Inc.Not reported | Corporation | Not reported | Not reported |
| 4 | Ajax Magnethermic CorporationNot reported | Corporation | Not reported | Not reported |
| 5 | Allegheny Cement Products CompanyNot reported | Corporation | Not reported | Not reported |
| 6 | Allegheny Veterans ClubNot reported | Nonprofit | Not reported | Not reported |
| 7 | American Legion Post No. 82, Department of Pennsylvania, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 8 | American Paddle & Racquet Courts, Inc.Not reported | Corporation | Not reported | Not reported |
| 9 | Amick Associates, Inc.Not reported | Corporation | Not reported | Not reported |
| 10 | Anderson Engineers, Inc.Not reported | Corporation | Not reported | Not reported |
| 11 | Andre Testing Laboratory Inc.Not reported | Corporation | Not reported | Not reported |
| 12 | Appalachian Food Products, Inc.Not reported | Corporation | Not reported | Not reported |
| 13 | Arlet and Ambrose, Inc.Not reported | Corporation | Not reported | Not reported |
| 14 | W. W. Armstrong, Inc.Not reported | Corporation | Not reported | Not reported |
| 15 | Bob Arnold Auto Body, Inc.Not reported | Corporation | Not reported | Not reported |
| 16 | B and L Equipment Sales Inc.Not reported | Corporation | Not reported | Not reported |
| 17 | Bales Restaurant IncNot reported | Corporation | Not reported | Not reported |
| 18 | Bartlett & StullNot reported | Corporation | Not reported | Not reported |
| 19 | Batey, Inc.Not reported | Corporation | Not reported | Not reported |
| 20 | Baylor CorporationNot reported | Corporation | Not reported | Not reported |
| 21 | Ben-fran, Inc.Not reported | Corporation | Not reported | Not reported |
| 22 | H. G. Benson and Sons IncorporatedNot reported | Corporation | Not reported | Not reported |
| 23 | Berry Door Speciality, Inc.Not reported | Corporation | Not reported | Not reported |
| 24 | Better Business Bureau of Western Pennsylvania, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 25 | Boor IncorporatedNot reported | Corporation | Not reported | Not reported |
| 26 | Bradburn Coal CompanyNot reported | Corporation | Not reported | Not reported |
| 27 | Braden & Mcsweeny, Inc.Not reported | Corporation | Not reported | Not reported |
| 28 | Brosky X-ray and Research Laboratories IncNot reported | Corporation | Not reported | Not reported |
| 29 | The Buddlee Company IncNot reported | Corporation | Not reported | Not reported |
| 30 | Builders Association of Metropolitan PittsburghNot reported | Nonprofit | Not reported | Not reported |
| 31 | Bushee, Inc.Not reported | Corporation | Not reported | Not reported |
| 32 | C T Enterprises IncorporatedNot reported | Corporation | Not reported | Not reported |
| 33 | C V T V Corp.Not reported | Corporation | Not reported | Not reported |
| 34 | Camphill Sportsmens ClubNot reported | Nonprofit | Not reported | Not reported |
| 35 | Cardinal Motor Parts Co.Not reported | Corporation | Not reported | Not reported |
| 36 | Caribe, Inc.Not reported | Corporation | Not reported | Not reported |
| 37 | Carlson Manufacturing Co.Not reported | Corporation | Not reported | Not reported |
| 38 | Carnegie Area Diamond Jubilee Celebration, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 39 | Carnegie Box and Crate CompanyNot reported | Corporation | Not reported | Not reported |
| 40 | Carnegie Camping ClubNot reported | Nonprofit | Not reported | Not reported |
| 41 | Carnegie Catholic Cultural CentreNot reported | Nonprofit | Not reported | Not reported |
| 42 | Carnegie Civic SymphonyNot reported | Nonprofit | Not reported | Not reported |
| 43 | Carnegie Coatings IncNot reported | Corporation | Not reported | Not reported |
| 44 | Carnegie Community Action Committee, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 45 | Carnegie Community BandNot reported | Nonprofit | Not reported | Not reported |
| 46 | Carnegie Firemen's Relief Association of the State of PennsylvaniaNot reported | Nonprofit | Not reported | Not reported |
| 47 | Carnegie Firemen's Pension Fund and Relief AssociationNot reported | Nonprofit | Not reported | Not reported |
| 48 | Carnegie Floor and Wall Coverings IncNot reported | Corporation | Not reported | Not reported |
| 49 | Carnegie Floral & Gift Shop IncNot reported | Corporation | Not reported | Not reported |
| 50 | Carnegie Foods, Inc.Not reported | Corporation | Not reported | Not reported |