| Pennsylvania State University |
22,456 |
| University of Pittsburgh Medical Center |
13,619 |
| University of Pittsburgh |
12,112 |
| Comcast Corporation |
10,349 |
| The PNC Financial Services Group |
8,476 |
| Carnegie Mellon University |
7,662 |
| SAP AG |
5,858 |
| Sunoco, Inc. |
4,654 |
| Drexel University College of Medicine |
4,592 |
| City of Philadelphia Pennsylvania |
4,265 |
| SunGard |
3,954 |
| Genesis HealthCare |
3,513 |
| The University of Pennsylvania |
3,425 |
| Howard Hanna Smythe Cramer |
3,279 |
| The United Judicial System of Pennsylvania |
2,875 |
| Ricoh Americas Corp |
2,821 |
| Universal Health Services, Inc. |
2,798 |
| Bayer Corporation |
2,774 |
| Temple University |
2,707 |
| Harrisburg Area Community College |
2,475 |
| Lincoln Financial Group |
2,315 |
| Lehigh Valley Health Network |
2,295 |
| K&L Gates LLP |
2,252 |
| The Vanguard Group, Inc. |
2,161 |
| Air Products and Chemicals, Inc. |
2,069 |
| Prudential Fox Roach, Inc. |
2,050 |
| Rite Aid Corporation |
2,031 |
| Dechert LLP |
2,028 |
| TE Connectivity |
2,027 |
| Aramark Uniform Services |
1,954 |
| Morgan, Lewis & Bockius LLP |
1,924 |
| Community College of Philadelphia |
1,757 |
| PPG Industries, Inc. |
1,720 |
| Thomas Jefferson University |
1,701 |
| The Children's Hospital of Philadelphia |
1,685 |
| Highmark Inc. |
1,684 |
| Children's Hospital of Pittsburgh |
1,680 |
| Drexel University |
1,675 |
| Aramark Corporation |
1,652 |
| Villanova University |
1,625 |
| Airgas Inc |
1,623 |
| West Chester University |
1,581 |
| Indiana University of Pennsylvania |
1,553 |
| Reading School District |
1,520 |
| Unisys Corporation |
1,520 |
| Geisinger Health System |
1,502 |
| AON |
1,497 |
| CDI Corp. |
1,492 |
| TEVA Pharmaceuticals |
1,477 |
| Reed Smith LLP |
1,453 |
| Lehigh University |
1,419 |
| Saint-Gobain |
1,386 |
| Select Medical Corporation |
1,348 |
| Downingtown Area School District |
1,347 |
| Lower Merion School District |
1,328 |
| Black Box Corporation |
1,317 |
| PPL Corporation |
1,316 |
| Janney Montgomery Scott LLC |
1,290 |
| The Hershey Company |
1,232 |
| West Penn Allegheny Health System |
1,159 |
| School District of Lancaster |
1,151 |
| Ace Group |
1,143 |
| Kenexa |
1,140 |
| FMC Corporation |
1,108 |
| Saint Joseph's University |
1,095 |
| Janssen Research & Development, L.L.C. |
1,079 |
| WESCO Distribution, Inc. |
1,039 |
| H. J. Heinz Company |
1,028 |
| East Penn School District |
1,007 |
| AmerisourceBergen |
986 |
| Slippery Rock University |
974 |
| Bucks County Community College |
955 |
| GSI Commerce, Inc. |
951 |
| State College Area School District |
925 |
| Mylan Inc. |
917 |
| Triumph Group, Inc. |
912 |
| Genpact Ltd. |
909 |
| Dick's Sporting Goods Inc |
907 |
| Central Dauphin School District |
906 |
| Hornor, Townsend and Kent, Inc. |
893 |
| Millersville University |
891 |
| Gettysburg College |
873 |
| Bryn Mawr College |
872 |
| Ahold U.S.A., Inc. |
848 |
| University of Pennsylvania, Nursing Science |
843 |
| Main Line Health |
841 |
| Armstrong World Industries, Inc. |
830 |
| The University of Scranton |
819 |
| Abington School District |
818 |
| Ametek, Inc. |
809 |
| Duane Morris LLP |
807 |
| Prudential Homesale Services Group |
796 |
| The Penn Mutual Life Insurance Co. |
796 |
| QVC, Inc. |
787 |
| Drinker Biddle & Reath LLP |
770 |
| Wilkes University |
767 |
| Erie Insurance Group |
764 |
| Northampton Community College |
763 |
| Gannon University |
759 |
| La Salle University |
757 |
| Crozer-Keystone Health System |
753 |
| SEI Investments Co. |
753 |
| Westinghouse Electric Company |
747 |
| Community College Allegheny County |
731 |
| Lincoln University |
730 |
| Kutztown University of Pennsylvania |
715 |
| Wharton School of the University of Pennsylvania |
701 |
| Susquehanna Bancshares, Inc. |
693 |
| Altoona Area School District |
690 |
| Cheltenham Township School District |
690 |
| School District of Haverford Township |
689 |
| Boyertown Area School District |
685 |
| Abington Memorial Hospital, Inc. |
672 |
| University of the Arts |
672 |
| Franklin & Marshall College |
664 |
| Guthrie Healthcare System |
657 |
| Dickinson College |
654 |
| Pep Boys |
653 |
| DePuy Synthes Companies |
653 |
| Exeter Township School District |
650 |
| Pennsylvania College of Technology |
642 |
| Cephalon, Inc. |
634 |
| DENTSPLY International Inc. |
634 |
| Allegheny Technologies Incorporated |
627 |
| Arkema Inc. |
626 |
| York College of Pennsylvania |
624 |
| GENEX Services, Inc. |
624 |
| Giant Eagle, Inc. |
622 |
| New Horizons Computer Learning Centers, Inc. |
621 |
| Moravian College |
619 |
| Duquesne University |
619 |
| Swarthmore College |
615 |
| School District of Philadelphia Education Center |
614 |
| AmeriGas Partners, L.P. |
612 |
| Gwynedd-Mercy College |
612 |
| PinnacleHealth |
611 |
| University of Pennsylvania Medical School |
605 |
| Independence Blue Cross |
592 |
| Kennametal Inc. |
585 |
| Day & Zimmermann |
582 |
| Marshall, Dennehey, Warner, Coleman & Goggin |
582 |
| Bellefonte Area School District |
576 |
| Centimark Corporation |
558 |
| Tredyffrin/Easttown School District |
558 |
| Toll Brothers, Inc. |
550 |
| Bloomsburg University |
550 |
| Philips Respironics, Inc. |
549 |
| Pepper Hamilton LLP |
546 |
| Crown Holdings, Inc. |
545 |
| North Hills School District |
544 |
| WellSpan Health |
540 |
| Fox Chase Cancer Center |
537 |
| Cozen O'Connor |
533 |
| Entercom Communications Corp. |
532 |
| United States Steel Corporation |
531 |
| The Reading Hospital and Medical Center |
526 |
| NCO Group, Inc. |
526 |
| Thomas Jefferson University Hospital |
522 |
| Shippensburg University of Pennsylvania |
517 |
| Blank Rome |
516 |
| Bon-Ton Stores, Inc. |
515 |
| Fox Rothschild LLP |
513 |
| Management Science Associates, Inc. |
507 |
| Rosemont College |
506 |
| Olympus America Inc. |
504 |
| Concurrent Technologies Corporation |
504 |
| Hamot Health Foundation Inc. |
501 |
| SCA Americas |
498 |
| Juniata College |
494 |
| Allegheny Energy, Inc. |
493 |
| SKF Group |
491 |
| American Eagle Outfitters, Inc. |
490 |
| Ursinus College |
489 |
| VWR International, LLC |
488 |
| Bethel Park School District |
486 |
| Weston Solutions, Inc. |
486 |
| Seton Hill University |
478 |
| Bucknell University |
478 |
| Elizabethtown College |
474 |
| Ballard Spahr LLP |
473 |
| Conemaugh Health System |
472 |
| Michael Baker Corporation |
469 |
| Penn State Milton S. Hershey Medical Center |
463 |
| NextGen Healthcare Information Systems |
457 |
| The School District of Philadelphia |
456 |
| Qliktech |
456 |
| Saint Francis University |
455 |
| EQT Corporation |
455 |
| Federated Investors, Inc. |
451 |
| McKeesport Area School District |
451 |
| Bensalem Township School District |
451 |
| West Pharmaceutical Services, Inc. |
450 |
| Burrell Area School District |
443 |
| Reading Area Community College |
440 |
| Tuscarora Intermediate Unit 11 |
439 |
| Take Care Health Systems |
439 |
| Executive Health Resources |
438 |
| Moon Area School District |
437 |
| Perkiomen Valley School District |
432 |
| B. Braun Medical, Inc. |
430 |
