| University of Pittsburgh Medical Center |
6,200 |
| University of Pittsburgh |
5,884 |
| Alcoa Inc. |
3,698 |
| Howard Hanna Smythe Cramer |
3,119 |
| Bayer Corporation |
2,631 |
| PNC Financial Services Group Inc |
2,281 |
| Prudential Realty |
2,277 |
| Reed Smith LLP |
1,742 |
| PPG Industries, Inc. |
1,087 |
| Highmark Inc. |
944 |
| Carnegie Mellon University |
802 |
| Community College Allegheny County |
769 |
| Heinz North America |
759 |
| Woodland Hills School District |
722 |
| Buchanan Ingersoll & Rooney PC |
611 |
| Children's Hospital of Pittsburgh |
573 |
| North Hills School District |
568 |
| West Penn Allegheny Health System |
529 |
| Carlow University |
506 |
| Giant Eagle, Inc. |
476 |
| Management Science Associates, Inc. |
466 |
| Duquesne University |
435 |
| Dick's Sporting Goods, Inc. |
423 |
| American Eagle Outfitters, Inc. |
422 |
| United States Steel Corporation |
395 |
| Point Park University |
395 |
| Federated Investors, Inc. |
373 |
| WESCO International, Inc. |
367 |
| National Energy Technology Laboratory (NETL) |
340 |
| Plum Borough School District |
334 |
| Coldwell Banker - Susan T. Silversmith |
324 |
| Bayer MaterialScience LLC |
293 |
| Prudential Preferred Realty - Pat Bacu |
281 |
| Eckert Seamans Cherin |
280 |
| Mine Safety Appliances Company |
273 |
| Buck Consultants |
268 |
| Keystone Oaks School District |
250 |
| Upper St. Clair School Dsitrict |
241 |
| Dickie, McCamey |
215 |
| Education Management Corporation |
214 |
| PG Publishing Company |
213 |
| EQT Corporation |
201 |
| Allegheny Technologies Incorporated |
198 |
| Baldwin-Whitehall School District |
189 |
| LANXESS |
155 |
| Duquesne Light Holdings, Inc. |
150 |
| Obermayer Rebmann Maxwell |
145 |
| City Net Inc |
142 |
| Allegheny County |
142 |
| Northgate School District |
141 |
| GENCO Distribution System, Inc. |
140 |
| Brunner, Inc |
134 |
| Avonworth School District |
133 |
| Thorp Reed |
131 |
| Cohen & Grigsby |
124 |
| La Roche College |
122 |
| GNC Corporation |
119 |
| City of Pittsburgh |
107 |
| Brentwood Borough School District |
105 |
| The Fox Chapel Area School District |
104 |
| Mine Safety and Health Administration |
103 |
| Matthews International Corp. |
101 |
| Renda Broadcasting Corporation |
101 |
| Jefferson Regional Hospital |
97 |
| Prudential Preferred Realty |
97 |
| Chromalox, Inc. |
95 |
| Oncology Nursing Society |
94 |
| Morneau Sobeco |
92 |
| Ansoft Corporation |
91 |
| Koppers Inc. |
89 |
| Carmeuse Lime, Inc. |
89 |
| Schneider Downs |
86 |
| Pitt Ohio Express |
85 |
| Vector Security, Inc. |
84 |
| Lock Haven University of PA |
80 |
| Pittsburgh Public Schools |
77 |
| L. B. Foster Company |
77 |
| Zoll Lifecor, Inc. |
77 |
| Dollar Bank, FSB |
75 |
| Converteam Inc |
75 |
| Federal Home Loan Bank of Pittsburgh |
74 |
| Ansaldo STS USA |
72 |
| Lewis-Goetz and Company, Inc. |
72 |
| WPXI-TV (NBC 11) |
70 |
| Burns, White & Hickton |
69 |
| Vocollect, Inc. |
68 |
| Babst, Calland, Clements |
66 |
| Prithvi Solutions |
63 |
| Pittsburgh Supercomputing Center |
63 |
| St. Clair Health Corporation |
63 |
| MED3OOO Group, Inc. |
63 |
| Tucker Arensberg, P.C. |
63 |
| Seubert |
63 |
| American International Relocation Solutions |
60 |
| WQED Multimedia |
60 |
| Pietragallo Gordon Alfano Bosick & Raspanti, LLP |
60 |
| Meyer, Unkovic |
59 |
| Hefren Tillotson Inc |
57 |
| Mellon Equity Associates, LLP |
57 |
| Microbac Laboratories Inc |
56 |
| Alpern, Rosenthal & Co. |
55 |
| Allegheny Conference On Community Development |
54 |
| Kta-Tator, Inc. |
51 |
| Barkley REI |
51 |
| Air |
50 |
| Unison Health Plan of Tennessee |
50 |
| Bechtel Plant Machinery, Inc. |
50 |
| Justifacts Credential Verification, Inc. |
50 |
| Tetra Tech NUS, Inc. |
49 |
| Meyer-Darragh-Buckler-Bebenek |
49 |
| Allegheny Investments Ltd |
48 |
| Urban Redevelopment Authority |
48 |
| Port Authority of Allegheny County |
47 |
| Access Data Corp. |
46 |
| Carnegie Museums and Library of Pittsburgh |
46 |
| Highmark Life |
44 |
| Gateway Health Plan Inc. |
44 |
| NEP Broadcasting LLC |
44 |
| The Pittsburgh Pirates |
44 |
| Invivodata |
43 |
| Aerotech, Inc |
43 |
| Grane Healthcare |
43 |
| Maronda Homes |
42 |
| Babcock Lumber Company |
42 |
| Direct Energy Business |
42 |
| North Allegheny School Dist |
42 |
| Steel City Media |
41 |
| Eat'n Park Hospitality Group |
41 |
| Computer Enterprises, Inc. |
41 |
| HM Insurance Group |
41 |
| The York Group |
40 |
| Confluence Technologies Inc. |
40 |
| Civil |
40 |
| ECHO Real Estate Services Company |
40 |
| Bernstein & Bernstein |
39 |
| Astorino |
39 |
| The Institute for Transfusion Medicine |
39 |
| Pressley Ridge |
39 |
| Dagostino Electronic Services |
39 |
| Southwestern Pennsylvania Commission |
38 |
| Greater Pittsburgh Convention |
38 |
| Leech Tishman Fuscaldo & Lampl |
38 |
| Expedient Communications |
37 |
| Parker/Hunter Incorporated |
36 |
| BPL Global |
36 |
| Cipriani & Werner, P.C. |
35 |
| Allin Corporation |
35 |
| Houston Harbaugh PC |
35 |
| Community Care Behavioral Health Organization |
35 |
| DynaVox Mayer-Johnson |
34 |
| Golf Galaxy, Inc. |
34 |
| Limbach Facility Services LLC |
34 |
| Catalyst Connection |
34 |
| Neville Chemical Company |
33 |
| Innovative Systems, Inc. |
33 |
| Chatham University |
33 |
| Tucker Johnston |
33 |
| Rothman Gordon PC |
33 |
| Fidelity Bancorp, Inc. |
32 |
| Pittsburgh Corning Corporation |
32 |
| Tele-Tracking Technologies, Inc. |
32 |
| Spang |
31 |
| Sherrard, German |
31 |
| Doepken Keevican |
31 |
| Simpson |
31 |
| Oxford Development Company |
30 |
| Pittsburgh Symphony |
30 |
| Allegheny County Airport Authority |
30 |
| Nityo Infotech |
30 |
| CLG |
30 |
| United Steel Workers |
30 |
| PEAK Technical Services, Inc. |
29 |
| Metz Lewis LLC |
29 |
| Robb Leonard Mulvihill |
29 |
| Landslide Technologies, Inc. |
29 |
| Western Pennsylvania Conservancy |
28 |
| The HDH Group |
28 |
| TEGG Service Corporation |
28 |
| Gsp Consulting Corp |
28 |
| Jennmar Corporation |
28 |
| CNX GAS CORPORATION |
28 |
| CardiacAssist, Inc. |
27 |
| IMPAQT |
27 |
| Grogan Graffam, P.C |
27 |
| Summa Technologies |
27 |
| PA Commercial Real Estate |
27 |
| inMedius |
26 |
| Van Dyk Business Systems |
26 |
| Calgon Carbon Corporation |
25 |
| A. Stucki Company |
25 |
| Carnegie Learning |
25 |
| The Webb Law Firm |
25 |
| National Real Estate Information Services |
25 |
| Abarta Inc. |
25 |
| Coalition-Christian Outreach |
25 |
| Pittsburgh Technology Council |
25 |
| Select International |
25 |
| Equity Real Estate |
25 |
| SigmaKalon |
25 |
| Gateway Travel Management Inc. |
24 |
