| Kraft Foods Group, Inc. |
16,083 |
| Allstate Insurance Company |
14,231 |
| The University of Chicago |
14,016 |
| Northwestern Mutual Life Insurance Company |
12,946 |
| The Boeing Company |
7,743 |
| Abbott Laboratories |
6,841 |
| Schneider Electric |
5,988 |
| University of Illinois at Chicago |
5,281 |
| City of Chicago |
5,085 |
| R.R. Donnelley & Sons Co. |
4,848 |
| Aon plc |
4,502 |
| Baxter International Inc. |
4,332 |
| Jones Lang LaSalle Incorporated |
4,269 |
| Fiserv, Inc. |
4,221 |
| Baker & McKenzie |
3,972 |
| Chicago Public Schools |
3,676 |
| Hyatt Hotels Corporation |
3,566 |
| Northwestern University |
3,555 |
| Sears Holdings Corporation |
3,290 |
| Marquette University |
3,164 |
| W.W. Grainger, Inc. |
3,149 |
| OfficeMax Incorporated |
2,914 |
| Rockwell Automation, Inc. |
2,837 |
| Kenosha Unified School District |
2,774 |
| Takeda Pharmaceuticals |
2,755 |
| BMO Harris Bank |
2,694 |
| Kohl's Corporation |
2,690 |
| Advocate Health Care |
2,668 |
| Northern Trust Corporation |
2,637 |
| US Foods |
2,634 |
| Walgreen Co. |
2,622 |
| Zurich Financial Services |
2,560 |
| Northern Illinois University |
2,550 |
| City Colleges of Chicago |
2,465 |
| DePaul University |
2,390 |
| Milwaukee Area Technical College |
2,354 |
| Rush University Medical Center |
2,177 |
| ManpowerGroup |
2,097 |
| Dentons |
2,069 |
| Plainfield Community Consolidated School District 202 |
2,052 |
| Tribune Company |
2,049 |
| Johnson Controls, Inc. |
2,048 |
| Draftfcb |
1,995 |
| Sidley Austin LLP |
1,985 |
| Arthur J. Gallagher & Co. |
1,964 |
| DeVry, Inc. |
1,944 |
| Ivy Tech Community College |
1,854 |
| First Midwest Bancorp, Inc. |
1,850 |
| Coldwell Banker Residential Brokerage |
1,796 |
| Grant Thornton LLP |
1,727 |
| Illinois Institute of Technology |
1,708 |
| Oakton Community College |
1,707 |
| YMCA of the USA |
1,692 |
| NorthShore University HealthSystem |
1,690 |
| Wolters Kluwer |
1,640 |
| A. T. Kearney, Inc. |
1,634 |
| General Growth Properties, Inc |
1,621 |
| Mayer Brown LLP |
1,611 |
| Kirkland & Ellis LLP |
1,606 |
| Aurora Health Care |
1,589 |
| McDermott Will & Emery LLP |
1,581 |
| United Continental Holdings, Inc. |
1,574 |
| Community Unit School District 300 |
1,565 |
| Allscripts |
1,549 |
| Hospira, Inc. |
1,531 |
| CNA |
1,501 |
| Anixter International Inc. |
1,454 |
| Blue Cross Blue Shield of Illinois (BCBSIL) |
1,450 |
| Cardinal Stritch University |
1,449 |
| Medical College of Wisconsin |
1,449 |
| Loyola University Health System |
1,436 |
| Hillshire Brands |
1,425 |
| True Value Company |
1,423 |
| Roosevelt University |
1,397 |
| Community Unit School District 303 |
1,356 |
| MillerCoors LLC |
1,352 |
| Ace Hardware Corporation |
1,351 |
| Edelman |
1,348 |
| Loyola University Chicago |
1,331 |
| Discover Financial Services |
1,304 |
| National-Louis University |
1,291 |
| East Aurora School District #131 |
1,272 |
| Elmbrook School District |
1,271 |
| Waubonsee Community College |
1,207 |
| Akzo Nobel CRNA |
1,193 |
| Experis |
1,192 |
| United States Cellular Corporation |
1,189 |
| University of Wisconsin-Whitewater |
1,184 |
| McDonald's Corporation |
1,178 |
| University of Wisconsin-Milwaukee |
1,171 |
| Columbia College Chicago |
1,164 |
| Extendicare Health Service Inc. |
1,123 |
| Wheaton College (Liberal Arts College) |
1,117 |
| Township High School District 211 |
1,103 |
| CME Group Inc |
1,095 |
| College of DuPage |
1,084 |
| Navigant Consulting, Inc. |
1,078 |
| Locke Lord Bissell & Liddell LLP |
1,060 |
| Elmhurst College |
1,054 |
| Lee & Associates |
1,052 |
| Provena Health |
1,047 |
| Argonne National Laboratory |
1,047 |
| Ann & Robert H. Lurie Children's Hospital of Chicago |
1,041 |
| USG |
1,019 |
| Tellabs, Inc. |
1,018 |
| GolinHarris |
1,002 |
| CareerBuilder, LLC |
989 |
| Harley-Davidson, Inc. |
976 |
| Band Digital Inc |
972 |
| Indian Prairie School District 204 |
967 |
| Aon Hewitt |
947 |
| Barrington 220 Community Unit School District |
942 |
| NiSource Inc. |
932 |
| TransUnion, LLC |
923 |
| Benedictine University |
918 |
| Seyfarth Shaw LLP |
910 |
| Foley & Lardner LLP |
897 |
| Glenbard District 87 |
889 |
| BDO USA, LLP |
884 |
| Motorola Solutions, Inc. |
883 |
| Heidrick & Struggles International, Inc. |
873 |
| Forsythe Technology, INC |
867 |
| Quad/Graphics, Inc. |
864 |
| Ministry Health Care, Inc. |
857 |
| Joliet Junior College |
850 |
| Alverno College |
845 |
| Nalco Holding Company |
841 |
| Robert Morris University |
835 |
| Duneland School Corporation |
833 |
| Pactiv Corporation |
830 |
| Quarles & Brady LLP |
814 |
| Crowe Horwath LLP |
813 |
| Woodstock Community Unit School District #200 |
808 |
| Blue Cross & Blue Shield Association |
798 |
| Mesirow Financial Holdings Inc. |
788 |
| LKQ Corporation |
783 |
| Thornton Township High School District 205 |
780 |
| William Blair & Company, L.L.C. |
779 |
| Shorewest Realtors |
775 |
| GE Healthcare |
754 |
| Resurrection Health Care |
749 |
| McGladrey LLP |
743 |
| Saint Xavier University |
733 |
| Waukesha County Technical College |
733 |
| Oak Park Elementary School District |
730 |
| Molex Incorporated |
721 |
| Edward Hospital and Health Services Corporation |
705 |
| Oswego 308 Community Unit School District |
698 |
| Right Management Consultants |
697 |
| Underwriters Laboratories Inc. |
678 |
| Tenneco Inc. |
672 |
| Lewis University |
663 |
| T-Systems North America Inc. |
660 |
| PSAV Presentation Services |
652 |
| KEMPER CORPORATION |
650 |
| Wheaton Franciscan Healthcare |
649 |
| We Energies |
646 |
| Brady Corporation |
645 |
| Prudential Rubloff Properties |
643 |
| Maine Township High School District 207 |
642 |
| Intercall, Inc. |
639 |
| Dominican University |
636 |
| CNH |
631 |
| College of Lake County |
629 |
| Naperville Community Unit School District 203 |
622 |
| Morningstar, Inc. |
621 |
| DeKalb High School |
621 |
| Hinshaw & Culbertson, LLP |
620 |
| Elmhurst School District 205 |
612 |
| Fermilab |
612 |
| American Intercontinental University |
605 |
| NAVTEQ Corporation |
596 |
| Medline Industries, Inc. |
596 |
| SymphonyIRI Group |
594 |
| Woodland School District 50 |
587 |
| Milwaukee Public Schools |
586 |
| IDEX Corporation |
579 |
| Baker Tilly Virchow Krause, LLP |
574 |
| Koenig & Strey |
568 |
| UOP LLC |
568 |
| S.C. Johnson & Son Incorporated |
564 |
| Lake Central School Corporation |
561 |
| Mu Sigma |
560 |
| Northwestern Memorial Hospital |
553 |
| Yorkville School Dist 115 |
551 |
| Lake Forest College |
534 |
| Trustwave |
532 |
| Community High School District 128 |
522 |
| Atlas Copco Compressors |
522 |
| Rich Township High School District 227 |
521 |
| Northwest Community Healthcare |
518 |
| Zebra Technologies Corporation |
517 |
| Kellogg School of Management |
515 |
| University of Wisconsin-Parkside |
512 |
| Brunswick Corporation |
512 |
| Baird & Warner |
507 |
| Nuveen Investments, Inc. |
501 |
| UPM-Kymmene, Inc. |
498 |
| McMaster-Carr Supply Co. |
496 |
| Veolia Environmental Services |
490 |
