| 3M Company |
| ACNielsen* |
| Advanta Corp.* |
| AEGON USA, Inc.* |
| Aflac Incorporated |
| Allianz Global Investors |
| Allied Insurance* |
| Allsteel Inc.* |
| American Airlines, Inc. |
| American Axle & Manufacturing |
| American Equity Investment Life |
| American International Group, Inc. |
| American Profol Inc.* |
| Ameriprise Financial, Inc.* |
| Amerus Capital Management* |
| Appleton Papers Inc.* |
| Armstrong World Industries, Inc.* |
| Avery Dennison Corporation* |
| Aviva Capital Management* |
| Bank of North Carolina/BB&T Corp.* |
| Best Buy Co., Inc.* |
| Boeing Company, The* |
| Bradford Group, The |
| Carlson Companies, Inc. |
| Caterpillar Inc.* |
| CCA Strategies LLC |
| Chicago Consulting Actuaries, LLC* |
| Citigroup Inc. |
| Cleargauge* |
| Clow Valve Company |
| Colgate – Palmolive Company |
| ConAgra Foods* |
| CSX Corporation |
| Cybus Capital Markets, LLC.* |
| Daiichi Sankyo Co., Limited* |
| DeBruce Grain, Inc. |
| Degussa Corporation |
| Dell Inc. |
| Deloitte Consulting LLP |
| Deutsche Bank* |
| Digital Artefacts LLC* |
| Discover Financial Services LLC* |
| E. & J. Gallo Winery |
| E.I. du Pont de Nemours and Company |
| Eaton Corporation* |
| Electonic Arts Inc. (EA Games)* |
| Eli Lilly and Company |
| Engineered Seal Products* |
| ENVIRON Holdings, Inc.* |
| Epic Systems Corporation |
| Ernst & Young, LLP |
| ESP International Inc.* |
| FactSet Research Systems Inc. |
| FedEx Corporation |
| Fidelity Investments Company, Inc. |
| Fifth Third Bank |
| First Commercial Bank Co., Ltd.* |
| First National Bank* |
| Frankfurter Volksbank* |
| Frito-Lay, Inc. |
| Frontier Cooperative Herbs Inc.* |
| General Electric Company |
| General Mills, Inc. |
| Georgia-Pacific Corporation |
| Gerdau S.A. |
| Global Granite & Marble, LLC* |
| GlobalSantaFe Corporation |
| Goldman Sachs Group, Inc., The* |
| Goodyear Tire & Rubber Company, The |
| Grant Thornton LLP |
| Hamilton Sundstrand Company |
| Harley-Davidson, Inc.* |
| Hasbro, Inc. |
| Health Care Futures L.P.* |
| Hewitt Associates, Inc. |
| Highway Equipment Company, Inc.* |
| HNI Corporation* |
| HON Company, The* |
|
| HSBC Finance Corporation* |
| IBM* |
| Information Handling Services Inc.* |
| Intel Corp.* |
| Interactive Mediums |
| JC Flowers & Co. LLC* |
| John Deere Credit Company* |
| Johnson & Johnson* |
| JPMorgan Chase & Co.* |
| Kellogg Company |
| Kemin Health, L.C. |
| Kimberly-Clark Corp. |
| Kleffmann & Partner GmbH & Co. |
| Kohler Co.* |
| Kraft Foods Inc. |
| Kum & Go |
| Kurt Salmon Associates |
| Lafarge North American Inc.* |
| Lowe's Home Improvement* |
| McGladrey & Pullen, LLP |
| Mercer Human Resource Consulting Limited |
| Merck & Co., Inc. |
| Meredith Corporation* |
| Merrill Lynch* |
| Microsoft Corporation |
| Miller Hybrids, Inc.* |
| Motorola Inc.* |
| Nationwide Mutual Insurance Company* |
| NIKE, Inc. |
| North Star Resource Group |
| Northwest Airlines Corporation* |
| OPN, Inc.* |
| Orbitz Worldwide, Inc.* |
| Oriental Trading Company, Inc. |
| OSI Group LLC |
| Pearson Education, Inc.* |
| Pella Corporation |
| PepsiCo, Inc. |
| Principal Financial Group, Inc.* |
| Procter & Gamble Company, The |
| Progressive Corporation, The* |
| Pure Fishing Asia Co., LTD* |
| Quantitative Risk Management Incorporated |
| Rawlings Sporting Goods Company* |
| RBC Dain Rauscher Corp.* |
| Richmark Group, Inc., The* |
| Rockwell Collins, Inc.* |
| RSM McGladrey Business Services, Inc. |
| Sankyo Pharma Inc. |
| Sara Lee Corporation |
| Sears Holding Corporation |
| Scotia Capital* |
| Security Benefit Group of Companies* |
| Shottenkirk Automotive Inc. |
| Social Security Administration |
| Sprint Nextel Corporation* |
| Stark Investments |
| Sun Microsystems, Inc. |
| Swiss Re Life and Health America Inc.* |
| Symantec Corporation |
| Target Corporation |
| Teach for America* |
| Thomson Financial* |
| Thrivent Financial Services |
| Tiger Hawk Profiles* |
| Towers Perrin |
| Tru Art Color Graphics* |
| UBS Investment Bank |
| Umicore Group - Belgium |
| Union Pacific Railroad Company |
| United Stationers |
| University of Iowa* |
| US Bank |
| Vanguard Group, Inc., The |
| Wachovia Corporation |
| Waddell & Reed Financial, Inc.* |
| Wal-Mart Stores, Inc. |
| Wells Fargo & Company* |
| Whirlpool Corporation* |
|
