| UBS Financial Services Inc. |
7,143 |
| University of Illinois at Chicago |
6,815 |
| The Boeing Company |
5,257 |
| DePaul University |
4,335 |
| The University of Chicago |
3,580 |
| National Association of Realtors |
2,812 |
| Baker & McKenzie LLP |
2,488 |
| Illinois Institute of Technology |
2,349 |
| K&L Gates |
2,339 |
| DLA PIPER LAW FIRM |
2,335 |
| Tribune Company |
2,199 |
| Kirkland & Ellis LLP |
1,988 |
| City Colleges of Chicago |
1,910 |
| National-Louis University |
1,868 |
| Roosevelt University |
1,832 |
| Jones Lang LaSalle Incorporated |
1,821 |
| R.R. Donnelley & Sons Company |
1,727 |
| Northern Trust Corporation |
1,692 |
| Sidley Austin LLP |
1,639 |
| McDermott, Will & Emery |
1,614 |
| Mayer Brown LLP |
1,571 |
| Hyatt Corporation |
1,560 |
| Sonnenschein Nath & Rosenthal, LLP |
1,454 |
| Grant Thornton LLP |
1,436 |
| Loyola University of Chicago |
1,419 |
| Exelon Corporation |
1,398 |
| Aon Corporation |
1,341 |
| Columbia College Chicago |
1,294 |
| Northeastern Illinois University |
1,267 |
| MillerCoors LLC |
1,215 |
| Robert Morris University |
1,213 |
| Winston & Strawn LLP |
1,180 |
| YMCA of the USA (National Headquarters) |
1,179 |
| Katten Muchin Rosenman LLP |
1,098 |
| CareerBuilder Inc. |
1,089 |
| Locke Lord Bissell |
1,088 |
| CNA Financial Corporation |
1,060 |
| Board of Education of The City of Chicago |
1,021 |
| Seyfarth Shaw LLP |
877 |
| The School of the Art Institute of Chicago |
856 |
| Blue Cross and Blue Shield of Illinois |
806 |
| Hinshaw & Culbertson, LLP |
803 |
| Starcom MediaVest Group |
735 |
| A. T. Kearney Inc. |
730 |
| City of Chicago |
717 |
| Saint Xavier University |
713 |
| UAL Corporation |
698 |
| BDO Seidman, LLP |
692 |
| Quarles |
665 |
| TransUnion, LLC |
659 |
| Harris Bankcorp, Inc. |
630 |
| Hudson Highland Group |
608 |
| General Growth Properties, Inc. |
607 |
| USG Corporation |
604 |
| Akzo Nobel NV |
600 |
| U.S. Cellular Corporation |
596 |
| Edelman |
588 |
| North Park University |
568 |
| DraftFCB |
548 |
| Evangelical Lutheran Church in America |
529 |
| Jenner & Block LLP |
519 |
| Wm. Wrigley Jr. Company |
502 |
| Mesirow Financial Holdings Inc. |
495 |
| The University of Chicago Graduate School of Business |
488 |
| William Blair & Company, L.L.C. |
487 |
| Navigant Consulting, Inc. |
485 |
| Rush University Medical Center |
483 |
| Heidrick & Struggles International, Inc. |
466 |
| Spencer Stuart Management Consultants N.V. |
463 |
| Alzheimer's Disease and Related Disorders Association, Inc. |
457 |
| USF Corporation |
451 |
| Allscripts-Misys Healthcare Solutions, Inc. |
446 |
| Blue Cross Blue Shield Association |
431 |
| American Medical Association |
418 |
| Schiff Hardin |
413 |
| Smurfit-Stone Container |
413 |
| Chicago Public School System |
412 |
| Intercall, Inc. |
404 |
| Axiom Associates, Inc. |
403 |
| Hub International |
403 |
| Securitas Security Services USA |
400 |
| University of Chicago Hospitals |
399 |
| Robert Half Technology |
394 |
| Vedder Price P.C. |
392 |
| GATX Corporation |
383 |
| Children's Memorial Hospital |
374 |
| Rexam Beverage Can Americas Inc. |
372 |
| The Quaker Oats Company |
369 |
| SPSS Inc. |
366 |
| Nuveen Investments, Inc. |
360 |
| @ properties |
360 |
| Lovells |
359 |
| NAVTEQ Corporation |
357 |
| Morningstar, Inc. |
340 |
| Huron Consulting Group Inc. |
340 |
| Northwestern Memorial Healthcare |
332 |
| Sun-Times Media Group, Inc. |
324 |
| Equity Office Properties Trust |
321 |
| Leo Burnett Worldwide, Inc. |
309 |
| Chapman and Cutler LLP |
293 |
| The Revere Group |
284 |
| American Bar Association |
284 |
| American Library Association |
280 |
| Classified Ventures |
279 |
| Bally Total Fitness Holding Corporation |
278 |
| UHY Advisors, Inc. |
270 |
| Ryerson, Inc. |
264 |
| Equity Residential |
262 |
| Unitrin, Inc. |
259 |
| ARC Worldwide |
252 |
| American Hospital Association |
248 |
| SmithBucklin Corporation |
246 |
| Neal, Gerber & Eisenberg LLP |
240 |
| Rubloff |
239 |
| Information Resources, Inc. |
233 |
| SIMS Group |
232 |
| Northwestern Medical Faculty Foundation, Inc. |
231 |
| Integrys Energy Group, Inc. |
229 |
| Health Care Service Corporation |
229 |
| Easter Seals, Inc. |
224 |
| Brinks Hofer Gilson |
220 |
| Chicago Transit Authority |
212 |
| Illinois Housing Development Authority |
210 |
| Bankers Life and Casualty Company |
209 |
| Veolia Environmental Services |
208 |
| Golin/Harris International |
207 |
| Cook County, Illinois |
202 |
| Berlin Packaging |
198 |
| Clausen Miller PC |
198 |
| Perkins+Will |
195 |
| Wildman, Harrold, Allen & Dixon LLP |
194 |
| Prudential Preferred Prop. |
190 |
| SmithAmundsen LLC |
187 |
| Telephone and Data Systems, Inc. |
186 |
| Henderson Global Investors |
181 |
| American Dental Association |
181 |
| Chicago-Kent College of Law |
180 |
| Dream Town Realty |
180 |
| Cook County Hospital |
180 |
| UGL Equis Corp. |
178 |
| Citadel Investment Group, LLC |
176 |
| MB Financial, Inc. |
163 |
| Arnstein |
163 |
| Chicago Board Options Exchange |
163 |
| LaSalle Investment Management |
161 |
| Cramer-Krasselt |
161 |
| Federal Reserve Bank of Chicago |
161 |
| Click Commerce Inc. |
160 |
| Ungaretti & Harris LLP |
160 |
| Littelfuse, Inc. |
158 |
| Freeborn & Peters LLP |
158 |
| Morton Salt Group |
155 |
| Orbitz Worldwide, Inc |
154 |
| The Private Bank |
150 |
| Select Hotels Group |
148 |
| NES Equipment Services Corporation d/b/a NES Rentals |
147 |
| Cook County Hospital |
146 |
| Blackman Kallick LLP |
144 |
| US Railroad Retirement Board |
144 |
| Playboy Enterprises, Inc. |
141 |
| Howe Barnes Hoefer |
140 |
| Segal McCambridge Singer |
140 |
| Much Shelist Freed Denenberg Ament |
137 |
| Querrey |
136 |
| Moody Bible Institute |
135 |
| CCC Information Services Inc. |
135 |
| Sargent & Lundy LLC |
134 |
| Chicago State University |
133 |
| Feeding America |
132 |
| Pepper Construction Group, LLC |
131 |
| Man Investment Products Inc. |
131 |
| Wayne Hummer Investments LLC |
130 |
| Pretzel |
130 |
| The Options Clearing Corporation |
128 |
| Mercy Hospital and Medical Center |
126 |
| Classic Residence by Hyatt |
126 |
| Federal Home Loan Bank of Chicago |
126 |
| GTCR Golder Rauner, LLC |
125 |
| Cision US, Inc. |
123 |
| Banner and Witcoff |
121 |
| Gala |
121 |
| S&C Electric Company |
121 |
| American College of Surgeons |
119 |
| American Invsco Corp. |
119 |
| The John Marshall Law School |
118 |
| The Art Institute of Chicago |
117 |
| Morton's Restaurant Group, Inc. |
117 |
| Goldberg Kohn |
117 |
| Computershare |
116 |
| Merchandise Mart |
115 |
| Levy Restaurants, Inc. |
115 |
| Cassiday, Schade |
115 |
| Peoples Energy Corporation |
115 |
| Jameson Realty Group |
114 |
| AbelsonTaylor Inc |
112 |
| PrivateBancorp, Inc. |
112 |
| Tripp Lite |
111 |
| EnvestNet Advisory Corp. |
110 |
| Archdiocese of Chicago |
110 |
| West Monroe Partners |
109 |
