| 1 | Abjp, Inc.Not reported | Corporation | Not reported | Not reported |
| 2 | A-c Recreation, Inc.Not reported | Corporation | Not reported | Not reported |
| 3 | Selective Investments, Inc.Not reported | Corporation | Not reported | Not reported |
| 4 | Abell Engineering Co., Inc.Not reported | Corporation | Not reported | Not reported |
| 5 | Acorn Construction Ltd.Not reported | Corporation | Not reported | Not reported |
| 6 | Acorn Realty, Inc.Not reported | Corporation | Not reported | Not reported |
| 7 | Agribusiness, Inc.Not reported | Corporation | Not reported | Not reported |
| 8 | Airmatic, Inc.Not reported | Corporation | Not reported | Not reported |
| 9 | Junior Service BoardNot reported | Nonprofit | Not reported | Not reported |
| 10 | Alpha Development Co., Inc.Not reported | Corporation | Not reported | Not reported |
| 11 | The Darby Group, Inc.Not reported | Corporation | Not reported | Not reported |
| 12 | American Collection Service, Inc.Not reported | Corporation | Not reported | Not reported |
| 13 | American Institute for Chartered Property Casualty UnderwritersNot reported | Nonprofit | Not reported | Not reported |
| 14 | Analy-syn Laboratories, Inc.Not reported | Corporation | Not reported | Not reported |
| 15 | Anglo-american Properties, Inc.Not reported | Corporation | Not reported | Not reported |
| 16 | Applied Energy Systems, Inc.Not reported | Corporation | Not reported | Not reported |
| 17 | Philadelphia/tri State Artists Equity Association, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 18 | Association for Forms Management IncorporatedNot reported | Nonprofit | Not reported | Not reported |
| 19 | Augustinian Daughters of the Crucified, Malvern CommunityNot reported | Nonprofit | Not reported | Not reported |
| 20 | Azat Bros., Inc.Not reported | Corporation | Not reported | Not reported |
| 21 | S. P. Baker Co.Not reported | Corporation | Not reported | Not reported |
| 22 | Bell Steel CoNot reported | Corporation | Not reported | Not reported |
| 23 | Bert Bell Memorial Football Conference, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 24 | Big Top Diner, Inc.Not reported | Corporation | Not reported | Not reported |
| 25 | Billmac, Inc.Not reported | Corporation | Not reported | Not reported |
| 26 | Birmingham Water CompanyNot reported | Corporation | Not reported | Not reported |
| 27 | Black Angus Meats of Reading, Inc.Not reported | Corporation | Not reported | Not reported |
| 28 | Blackburn, Inc.Not reported | Corporation | Not reported | Not reported |
| 29 | The Interlock Group, Inc.Not reported | Corporation | Not reported | Not reported |
| 30 | Bobjones, Inc.Not reported | Corporation | Not reported | Not reported |
| 31 | Brah CorporationNot reported | Corporation | Not reported | Not reported |
| 32 | Brooke Productions, Inc.Not reported | Corporation | Not reported | Not reported |
| 33 | Gerald E. Brown Builders, Inc.Not reported | Corporation | Not reported | Not reported |
| 34 | Bryn Mawr Operating CompanyNot reported | Corporation | Not reported | Not reported |
| 35 | Rouse & Associates - 55 Valley Stream Parkway Limited PartnershipNot reported | Partnership | Not reported | Not reported |
| 36 | The Butterfly Shop, Inc.Not reported | Corporation | Not reported | Not reported |
| 37 | Cdj Inc.Not reported | Corporation | Not reported | Not reported |
| 38 | C-t-s Products IncNot reported | Corporation | Not reported | Not reported |
| 39 | Cardt Leasing CorporationNot reported | Corporation | Not reported | Not reported |
| 40 | Care-0-wee, Inc.Not reported | Corporation | Not reported | Not reported |
| 41 | Carr Liquid Transport, Inc.Not reported | Corporation | Not reported | Not reported |
| 42 | Carr, William Jr. Construction and Development Co., Inc.Not reported | Corporation | Not reported | Not reported |
| 43 | Chester County Commons Owners' Association, Inc.Not reported | Nonprofit | Not reported | Not reported |
| 44 | Chadds Ford Water CompanyNot reported | Corporation | Not reported | Not reported |
| 45 | The David S. Chapman Agency, Inc.Not reported | Corporation | Not reported | Not reported |
| 46 | Charisma of America, Inc.Not reported | Corporation | Not reported | Not reported |
| 47 | Chemclene CorporationNot reported | Corporation | Not reported | Not reported |
| 48 | Ches-mont Utilities Construction CompanyNot reported | Corporation | Not reported | Not reported |
| 49 | Tri-county Suburban RealtorsNot reported | Nonprofit | Not reported | Not reported |
| 50 | Chester County Equestrian Center, Inc.Not reported | Corporation | Not reported | Not reported |