| Pennsylvania State University |
23,059 |
| University of Pittsburgh Medical Center |
13,585 |
| University of Pittsburgh |
12,662 |
| Comcast Corporation |
10,230 |
| The PNC Financial Services Group |
8,139 |
| Carnegie Mellon University |
7,666 |
| SAP AG |
6,057 |
| Drexel University College of Medicine |
4,600 |
| City of Philadelphia Pennsylvania |
4,259 |
| SunGard |
3,922 |
| Genesis HealthCare |
3,690 |
| The University of Pennsylvania |
3,375 |
| Howard Hanna Smythe Cramer |
3,277 |
| Bayer Corporation |
2,875 |
| The United Judicial System of Pennsylvania |
2,858 |
| Ricoh Americas Corp |
2,815 |
| Universal Health Services, Inc. |
2,810 |
| Temple University |
2,662 |
| Harrisburg Area Community College |
2,476 |
| Lehigh Valley Health Network |
2,298 |
| K&L Gates LLP |
2,207 |
| The Vanguard Group, Inc. |
2,160 |
| Lincoln Financial Group |
2,154 |
| Air Products and Chemicals, Inc. |
2,095 |
| TE Connectivity |
2,034 |
| Prudential Fox Roach, Inc. |
2,020 |
| Rite Aid Corporation |
2,015 |
| Morgan, Lewis & Bockius LLP |
1,934 |
| Aramark Uniform Services |
1,888 |
| Dechert LLP |
1,801 |
| PPG Industries, Inc. |
1,765 |
| Community College of Philadelphia |
1,757 |
| Select Medical Corporation |
1,742 |
| Thomas Jefferson University |
1,676 |
| Highmark Inc. |
1,675 |
| Children's Hospital of Pittsburgh |
1,671 |
| Drexel University |
1,665 |
| Aramark Corporation |
1,639 |
| Villanova University |
1,624 |
| Airgas Inc |
1,612 |
| AON |
1,600 |
| West Chester University |
1,595 |
| The Children's Hospital of Philadelphia |
1,595 |
| Indiana University of Pennsylvania |
1,565 |
| Reading School District |
1,535 |
| Unisys Corporation |
1,525 |
| CDI Corp. |
1,514 |
| Geisinger Health System |
1,497 |
| Reed Smith LLP |
1,468 |
| TEVA Pharmaceuticals |
1,448 |
| Lehigh University |
1,415 |
| Saint-Gobain |
1,391 |
| Downingtown Area School District |
1,346 |
| Lower Merion School District |
1,330 |
| PPL Corporation |
1,302 |
| Black Box Corporation |
1,285 |
| The Hershey Company |
1,229 |
| Kenexa |
1,205 |
| West Penn Allegheny Health System |
1,190 |
| School District of Lancaster |
1,159 |
| Janney Montgomery Scott LLC |
1,130 |
| Ace Group |
1,118 |
| FMC Corporation |
1,101 |
| Janssen Research & Development, L.L.C. |
1,098 |
| WESCO Distribution, Inc. |
1,043 |
| H. J. Heinz Company |
1,015 |
| East Penn School District |
1,007 |
| Triumph Group, Inc. |
988 |
| Slippery Rock University |
976 |
| AmerisourceBergen |
971 |
| Bucks County Community College |
959 |
| GSI Commerce, Inc. |
934 |
| State College Area School District |
926 |
| Genpact Ltd. |
912 |
| Central Dauphin School District |
912 |
| Millersville University |
907 |
| Dick's Sporting Goods Inc |
895 |
| Mylan Inc. |
890 |
| Gettysburg College |
874 |
| Bryn Mawr College |
873 |
| Ahold U.S.A., Inc. |
871 |
| University of Pennsylvania, Nursing Science |
843 |
| Armstrong World Industries, Inc. |
842 |
| Main Line Health |
833 |
| The University of Scranton |
812 |
| Duane Morris LLP |
803 |
| Prudential Homesale Services Group |
801 |
| Wilkes University |
798 |
| Ametek, Inc. |
793 |
| The Penn Mutual Life Insurance Co. |
791 |
| Westinghouse Electric Company |
787 |
| Drinker Biddle & Reath LLP |
772 |
| La Salle University |
766 |
| Northampton Community College |
761 |
| Erie Insurance Group |
758 |
| QVC, Inc. |
755 |
| Crozer-Keystone Health System |
749 |
| SEI Investments Co. |
741 |
| Susquehanna Bancshares, Inc. |
740 |
| Lincoln University |
732 |
| Community College Allegheny County |
727 |
| Kutztown University of Pennsylvania |
725 |
| Saint Joseph's University |
709 |
| Guthrie Healthcare System |
694 |
| Wharton School of the University of Pennsylvania |
693 |
| Altoona Area School District |
692 |
| Cheltenham Township School District |
691 |
| School District of Haverford Township |
688 |
| Boyertown Area School District |
684 |
| Abington Memorial Hospital, Inc. |
664 |
| Franklin & Marshall College |
664 |
| Dickinson College |
652 |
| Exeter Township School District |
650 |
| Pep Boys |
648 |
| DePuy Synthes Companies |
648 |
| Arkema Inc. |
646 |
| Pennsylvania College of Technology |
640 |
| New Horizons Computer Learning Centers, Inc. |
634 |
| Allegheny Technologies Incorporated |
630 |
| GENEX Services, Inc. |
630 |
| Duquesne University |
627 |
| York College of Pennsylvania |
622 |
| Swarthmore College |
620 |
| DENTSPLY International Inc. |
617 |
| AmeriGas Partners, L.P. |
614 |
| Cephalon, Inc. |
612 |
| Gwynedd-Mercy College |
612 |
| PinnacleHealth |
608 |
| Giant Eagle, Inc. |
607 |
| Kennametal Inc. |
606 |
| Independence Blue Cross |
600 |
| Day & Zimmermann |
595 |
| School District of Philadelphia Education Center |
592 |
| Marshall, Dennehey, Warner, Coleman & Goggin |
580 |
| Bellefonte Area School District |
576 |
| Centimark Corporation |
567 |
| Philips Respironics, Inc. |
561 |
| Tredyffrin/Easttown School District |
558 |
| Sunoco, Inc. |
556 |
| Crown Holdings, Inc. |
553 |
| Bloomsburg University |
548 |
| Entercom Communications Corp. |
548 |
| North Hills School District |
546 |
| Toll Brothers, Inc. |
546 |
| Fox Chase Cancer Center |
545 |
| NCO Group, Inc. |
541 |
| WellSpan Health |
539 |
| University of Pennsylvania Medical School |
534 |
| Cozen O'Connor |
532 |
| Shippensburg University of Pennsylvania |
531 |
| Thomas Jefferson University Hospital |
527 |
| Juniata College |
521 |
| Management Science Associates, Inc. |
521 |
| Allegheny Energy, Inc. |
521 |
| SCA Americas |
519 |
| The Reading Hospital and Medical Center |
519 |
| Blank Rome |
515 |
| United States Steel Corporation |
514 |
| Concurrent Technologies Corporation |
513 |
| Pepper Hamilton LLP |
513 |
| Fox Rothschild LLP |
512 |
| Olympus America Inc. |
508 |
| Bon-Ton Stores, Inc. |
508 |
| Rosemont College |
508 |
| Hamot Health Foundation Inc. |
507 |
| SKF Group |
496 |
| American Eagle Outfitters, Inc. |
495 |
| Ursinus College |
492 |
| University of the Arts |
491 |
| Weston Solutions, Inc. |
484 |
| Conemaugh Health System |
482 |
| Michael Baker Corporation |
481 |
| VWR International, LLC |
481 |
| Seton Hill University |
478 |
| Elizabethtown College |
474 |
| Bucknell University |
472 |
| Ballard Spahr LLP |
471 |
| Bethel Park School District |
469 |
| EQT Corporation |
465 |
| Qliktech |
463 |
| NextGen Healthcare Information Systems |
462 |
| West Pharmaceutical Services, Inc. |
455 |
| McKeesport Area School District |
455 |
| Saint Francis University |
454 |
| Hornor, Townsend and Kent, Inc. |
453 |
| Bensalem Township School District |
453 |
| Federated Investors, Inc. |
448 |
| Penn State Milton S. Hershey Medical Center |
443 |
| Tuscarora Intermediate Unit 11 |
438 |
| Take Care Health Systems |
437 |
| Moon Area School District |
436 |
| Misericordia University |
436 |
| Pennsylvania Real Estate Investment Trust |
435 |
| Reading Area Community College |
433 |
| Perkiomen Valley School District |
430 |
| Wayne Memorial Health System |
425 |
| B. Braun Medical, Inc. |
424 |
| Draeger Medical Inc. |
420 |
| De Lage Landen Financial Services Inc |
418 |
| Burrell Area School District |
417 |
