| Pennsylvania State University |
10,003 |
| University of Pittsburgh Medical Center |
6,221 |
| University of Pittsburgh |
5,849 |
| SunGard Data Systems Inc. |
5,526 |
| SAP America, Inc. |
5,344 |
| City of Philadelphia, Pennsylvania |
5,266 |
| CIGNA Corporation |
3,834 |
| Alcoa Inc. |
3,734 |
| Howard Hanna Smythe Cramer |
3,119 |
| Comcast Corporation |
2,827 |
| CDI Corp. |
2,620 |
| Bayer Corporation |
2,608 |
| IKON Office Solutions, Inc. |
2,583 |
| Morgan, Lewis & Bockius LLP |
2,376 |
| Saint Joseph's University |
2,333 |
| PNC Financial Services Group Inc |
2,304 |
| Reading School District |
2,298 |
| Prudential Fox Roach, Inc. |
2,158 |
| Prudential Realty |
2,146 |
| Harrisburg Area Community College |
2,118 |
| Commonwealth of Pennsylvania |
2,062 |
| Unisys Corporation |
1,993 |
| Indiana University of Pennsylvania |
1,859 |
| William Penn School District |
1,819 |
| Reed Smith LLP |
1,608 |
| Dechert LLP |
1,604 |
| Downingtown Area School District |
1,561 |
| University Of Pennsylvania |
1,406 |
| School District of Lancaster |
1,382 |
| School District of Philadelphia Education Center |
1,345 |
| Drexel University |
1,343 |
| ARAMARK Corporation |
1,319 |
| Temple University |
1,288 |
| York College of Pennsylvania |
1,287 |
| State College Area School District |
1,285 |
| Franklin & Marshall College |
1,145 |
| PPG Industries, Inc. |
1,095 |
| Central Dauphin School District |
1,045 |
| Black Box Corporation |
1,036 |
| Towers Perrin |
1,010 |
| The Vanguard Group, Inc. |
1,005 |
| Air Products and Chemicals, Inc. |
998 |
| Millersville University |
987 |
| Saint-Gobain Corporation |
965 |
| Sovereign Bancorp, Inc. |
957 |
| Highmark Inc. |
943 |
| Lincoln National Corporation |
937 |
| Lower Merion School District |
924 |
| Pepper Hamilton LLP |
921 |
| Bryn Mawr College |
915 |
| The University of Scranton |
897 |
| Slippery Rock University |
888 |
| Drinker Biddle & Reath LLP |
885 |
| Swarthmore College |
837 |
| Airgas, Inc. |
836 |
| Prudential Homesale Services Group |
831 |
| Teva Pharmaceuticals USA |
825 |
| Bucks County Community College |
813 |
| PPL Corporation |
802 |
| Altoona Area School District |
792 |
| Heinz North America |
786 |
| Carnegie Mellon University |
775 |
| Community College Allegheny County |
772 |
| Centocor, Inc. |
764 |
| Citi Smith Barney |
755 |
| Duane Morris LLP |
752 |
| Cumberland Valley School District |
745 |
| The Hershey Company |
739 |
| Daniel Boone Area School District |
725 |
| GMAC Mortgage, LLC |
723 |
| Woodland Hills School District |
722 |
| La Salle University |
677 |
| Rohm and Haas Company |
674 |
| Souderton Area School District |
673 |
| Dickinson College |
672 |
| Cheltenham Township School District |
671 |
| Ballard Spahr LLP |
661 |
| ACE INA |
631 |
| Moravian College |
626 |
| Robert Morris University |
625 |
| FMC Corporation |
623 |
| Respironics, Inc. |
617 |
| Manheim Township School District |
608 |
| Rite Aid Corporation |
603 |
| Shire US |
601 |
| Huntingdon Co CTC |
599 |
| Lincoln University |
594 |
| Allegheny Energy, Inc. |
584 |
| Pennsylvania College of Technology |
584 |
| Cephalon, Inc. |
582 |
| Children's Hospital of Pittsburgh |
576 |
| Marshall, Dennehey, Warner, Coleman & Goggin |
571 |
| North Hills School District |
567 |
| Lehigh University |
564 |
| Armstrong World Industries, Inc. |
561 |
| Blank Rome LLP |
560 |
| Buchanan Ingersoll & Rooney PC |
559 |
| Carlisle Area School District |
555 |
| Geisinger Health System |
553 |
| Philadelphia Newspapers Inc |
546 |
| QVC, Inc. |
543 |
| Albright College |
542 |
| Fox Rothschild LLP |
534 |
| West Penn Allegheny Health System |
532 |
| Juniata College |
523 |
| AmerisourceBergen Corporation |
519 |
| Moon Area School District |
519 |
| Aamco Transmissions |
515 |
| Carlow University |
506 |
| The Children's Hospital of Philadelphia |
506 |
| Crown Holdings, Inc. |
503 |
| Haverford College |
501 |
| Sunoco, Inc. |
499 |
| Schoolwires |
489 |
| Bethel Park School District |
488 |
| Bellefonte Area School District |
475 |
| Management Science Associates, Inc. |
466 |
| Triumph Group, Inc. |
459 |
| Perkiomen Valley School District |
458 |
| Right Management Consultants |
450 |
| Allegheny College |
449 |
| McKeesport Area School District |
449 |
| Entercom Communications Corp. |
448 |
| American Eagle Outfitters, Inc. |
444 |
| Capmark |
442 |
| Cozen O'Connor |
435 |
| Bensalem Township School District |
435 |
| Dick's Sporting Goods, Inc. |
433 |
| University of the Arts |
432 |
| Duquesne University |
430 |
| Kenexa |
429 |
| Villanova University |
424 |
| Universal Health Services, Inc. |
424 |
| Kennametal Inc. |
420 |
| Giant Eagle, Inc. |
416 |
| AmeriGas Partners, L.P. |
416 |
| Pittsburgh Tribune Review/News |
414 |
| Ametek, Inc. |
411 |
| Rodale, Inc. |
406 |
| New Horizons Computer Learning Centers, Inc. |
406 |
| GSI Commerce, Inc. |
404 |
| Misericordia University |
403 |
| United States Steel Corporation |
402 |
| University of Pennsylvania Health System |
402 |
| Ursinus College |
401 |
| Independence Blue Cross |
400 |
| Westinghouse Electric Company |
399 |
| Luzerne County Community College |
395 |
| Point Park University |
395 |
| Mansfield University Of Pennsylvania |
385 |
| Kennett Consolidated School District |
381 |
| Concurrent Technologies Corporation |
380 |
| Mylan, Inc. |
376 |
| Delaware Valley School District |
376 |
| Thomas Jefferson University |
373 |
| The Bon-Ton Stores, Inc. |
373 |
| Gwynedd-Mercy College |
371 |
| Dallastown Area School District |
368 |
| 84 Lumber Company |
367 |
| WESCO International, Inc. |
367 |
| Conestoga Valley School District |
362 |
| WellSpan Health |
358 |
| Bucknell University |
358 |
| DecisionOne Corporation |
357 |
| Arkema Inc. |
355 |
| Susquehanna University |
353 |
| Avon Grove Intermediate School |
351 |
| Waynesboro Area School District |
347 |
| Main Line Health |
346 |
| Erie Insurance Group |
346 |
| Chambersburg Area School District |
343 |
| National Energy Technology Laboratory (NETL) |
341 |
| Drexel University College of Medicine |
339 |
| Pennsbury School District |
338 |
| Wharton School of the University of Pennsylvania |
335 |
| Plum Borough School District |
334 |
| Medrad, Inc. |
333 |
| Gettysburg College |
332 |
| DENTSPLY International Inc. |
332 |
| Elizabethtown College |
330 |
| Crozer-Keystone Health System |
329 |
| Rosemont College |
326 |
| Washington & Jefferson College |
325 |
| Coldwell Banker - Susan T. Silversmith |
323 |
| SEI Investments Co. |
322 |
| Federated Investors, Inc. |
321 |
| Exeter Township School District |
321 |
| Elizabeth Forward School District |
318 |
| Toll Brothers, Inc. |
317 |
| Geneva College |
315 |
| Franklin Regional School District |
315 |
| Hampton Township School District |
312 |
| Michael Baker Corporation |
304 |
| Penn Mutual Life Insurance Company |
304 |
| NORTHUMBERLAND COUNTY |
302 |
| White and Williams, LLP |
301 |
| Ridley School District |
301 |
| Immaculata University |
299 |
| Burrell Area School District |
298 |
| Blue Mountain School District |
296 |
