| State Farm Mutual Automobile Insurance Company |
17,490 |
| Kraft Foods Group, Inc. |
16,083 |
| Allstate Insurance Company |
14,231 |
| The University of Chicago |
14,016 |
| Southern Illinois University |
7,789 |
| The Boeing Company |
7,743 |
| Abbott Laboratories |
6,841 |
| John Deere Company |
6,689 |
| 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 |
| CDW Corporation |
4,076 |
| Baker & McKenzie |
3,972 |
| The University of Chicago Medicine |
3,807 |
| Chicago Public Schools |
3,676 |
| Hyatt Hotels Corporation |
3,566 |
| Northwestern University |
3,555 |
| Sears Holdings Corporation |
3,290 |
| W.W. Grainger, Inc. |
3,149 |
| University Illinois Urbana Campus |
2,933 |
| Caterpillar |
2,923 |
| OfficeMax Incorporated |
2,914 |
| Takeda Pharmaceuticals |
2,755 |
| BMO Harris Bank |
2,694 |
| Advocate Health Care |
2,668 |
| Northern Trust Corporation |
2,637 |
| US Foods |
2,634 |
| Walgreen Co. |
2,622 |
| Western Illinois University |
2,577 |
| Zurich Financial Services |
2,560 |
| Northern Illinois University |
2,550 |
| City Colleges of Chicago |
2,465 |
| DePaul University |
2,390 |
| State of Illinois |
2,287 |
| University of Illinois |
2,196 |
| Rush University Medical Center |
2,177 |
| Dentons |
2,069 |
| Illinois State University |
2,063 |
| Plainfield Community Consolidated School District 202 |
2,052 |
| Tribune Company |
2,049 |
| Archer Daniels Midland Company |
2,026 |
| Draftfcb |
1,995 |
| Sidley Austin LLP |
1,985 |
| Arthur J. Gallagher & Co. |
1,964 |
| COUNTRY Financial |
1,959 |
| DeVry, Inc. |
1,944 |
| First Midwest Bancorp, Inc. |
1,850 |
| Exelon Corporation |
1,829 |
| 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 |
| Peoria School District 150 |
1,619 |
| Mayer Brown LLP |
1,611 |
| Kirkland & Ellis LLP |
1,606 |
| 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 |
| Northeastern Illinois University |
1,456 |
| Anixter International Inc. |
1,454 |
| Blue Cross Blue Shield of Illinois (BCBSIL) |
1,450 |
| Loyola University Health System |
1,436 |
| Hillshire Brands |
1,425 |
| True Value Company |
1,423 |
| Roosevelt University |
1,397 |
| Quaker Oats Company |
1,394 |
| 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 |
| School District U-46 |
1,303 |
| CHAMPAIGN COMMUNITY UNIT SCHOOL DISTRICT 4 |
1,298 |
| National-Louis University |
1,291 |
| East Aurora School District #131 |
1,272 |
| Eastern Illinois University |
1,219 |
| Waubonsee Community College |
1,207 |
| Johnson |
1,200 |
| Akzo Nobel CRNA |
1,193 |
| United States Cellular Corporation |
1,189 |
| McDonald's Corporation |
1,178 |
| Columbia College Chicago |
1,164 |
| Wheaton College (Liberal Arts College) |
1,117 |
| Southern Illinois University School of education Medicine |
1,111 |
| Township High School District 211 |
1,103 |
| CME Group Inc |
1,095 |
| Transamerica Life Insurance and Annuity Company LLC |
1,087 |
| College of DuPage |
1,084 |
| Navigant Consulting, Inc. |
1,078 |
| Community Unit School Dist 200 |
1,070 |
| 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 |
| Chicago State University |
1,027 |
| Black Hawk College |
1,022 |
| Winston & Strawn LLP |
1,020 |
| USG |
1,019 |
| Tellabs, Inc. |
1,018 |
| GolinHarris |
1,002 |
| Rock Valley College |
994 |
| CareerBuilder, LLC |
989 |
| Clifton Gunderson LLP |
982 |
| Springfield Public Schools #186 |
978 |
| Navistar, Inc. |
975 |
| Band Digital Inc |
972 |
| Indian Prairie School District 204 |
967 |
| Astellas Pharma US, Inc. |
956 |
| Aon Hewitt |
947 |
| Barrington 220 Community Unit School District |
942 |
| TransUnion, LLC |
923 |
| Benedictine University |
918 |
| Seyfarth Shaw LLP |
910 |
| Hub International |
895 |
| Glenbard District 87 |
889 |
| BDO USA, LLP |
884 |
| Motorola Solutions, Inc. |
883 |
| Heidrick & Struggles International, Inc. |
873 |
| Forsythe Technology, INC |
867 |
| McLean County District Unit District No. 5 |
858 |
| Joliet Junior College |
850 |
| OSF Healthcare System |
841 |
| Nalco Holding Company |
841 |
| Robert Morris University |
835 |
| Sotheby's International Realty, Inc. |
832 |
| Pactiv Corporation |
830 |
| Crowe Horwath LLP |
813 |
| Woodstock Community Unit School District #200 |
808 |
| Governors State University |
807 |
| Blue Cross & Blue Shield Association |
798 |
| Mesirow Financial Holdings Inc. |
788 |
| Crete-Monee School District |
785 |
| North Park University |
784 |
| LKQ Corporation |
783 |
| Thornton Township High School District 205 |
780 |
| William Blair & Company, L.L.C. |
779 |
| Danville School District 118 |
762 |
| Horace Mann Educators Corporation |
758 |
| Resurrection Health Care |
749 |
| McGladrey LLP |
743 |
| Saint Xavier University |
733 |
| Oak Park Elementary School District |
730 |
| Molex Incorporated |
721 |
| Edward Hospital and Health Services Corporation |
705 |
| Oswego 308 Community Unit School District |
698 |
| Starcom MediaVest Group |
695 |
| Rockford Public School District #205 |
689 |
| Aurora University |
681 |
| Glenbrook High School District 225 |
678 |
| Underwriters Laboratories Inc. |
678 |
| Tenneco Inc. |
672 |
| Illinois Valley Community College |
670 |
| New Trier High School |
664 |
| Lewis University |
663 |
| T-Systems North America Inc. |
660 |
| PSAV Presentation Services |
652 |
| KEMPER CORPORATION |
650 |
| The School of the Art Institute of Chicago |
650 |
| Wheaton Franciscan Healthcare |
649 |
| 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 |
| Carle Foundation Hospital |
615 |
| Fermilab |
612 |
| Elmhurst School District 205 |
612 |
| Arlington Heights Sch Dist 25 |
609 |
| American Intercontinental University |
605 |
| Elgin Community College |
601 |
| NAVTEQ Corporation |
596 |
| Medline Industries, Inc. |
596 |
| SymphonyIRI Group |
594 |
| Packaging Corporation of America |
594 |
| The University of Chicago Booth School of Business |
588 |
| Woodland School District 50 |
587 |
| IDEX Corporation |
579 |
| Lincoln Land Community College |
576 |
| Baker Tilly Virchow Krause, LLP |
574 |
| Koenig & Strey |
568 |
