| Business | Founded | Contacts |
|---|---|---|
| SPSS Us Inc | 1775 | 4 |
| Johnson Controls | 1885 | 2 |
| Sears, Roebuck and Co. | 1886 | 5 |
| Dentons | 1906 | 292 |
| Dentons | 1906 | 82 |
| Dentons US LLP | 1906 | 5 |
| United Cargo | 1926 | 53 |
| United | 1934 | 40 |
| Allianz Global Risks US Insurance Company | 1938 | 23 |
| International Effective | 1944 | 11 |
| Intl Engineering Consortium | 1944 | 41 |
| Camp Dresser & McKee In. | 1948 | 1 |
| Holman & Stefanowicz | 1948 | 6 |
| Morgan Stanley Wealth Management | 1948 | 5 |
| Environmental Systems Design, Inc. | 1967 | 261 |
| Gerald Dunlap Skoning | 1967 | - |
| Kennedy, Brigid E | 1967 | 1 |
| Williams Montgomery & John Ltd. | 1967 | 125 |
| Entrex, Inc. | 1968 | 6 |
| Merrill Lynch | 1968 | 5 |
| United Continental Holdings, Inc | 1968 | 14 |
| Willis Hrh | 1970 | 10 |
| Willis of Illinois Inc | 1970 | 8 |
| Leonard Quick International | 1972 | 1 |
| GATX Corporation | 1973 | 1308 |
| Willis Tower | 1973 | 12 |
| Metropolitan Business C. | 1974 | 1 |
| The Boardwalk Financial Services | 1974 | 1 |
| Christopher Arthur Bloom | 1975 | 1 |
| Gatx Corporation | 1975 | 1 |
| Norman Broadbent International | 1975 | 3 |
| Greythorn | 1976 | 3 |
| Linebarger Goggan Blair & Sampson LLP | 1976 | 9 |
| Douglass C. Hochstetler | 1977 | 1 |
| Owl Network Inc | 1977 | - |
| Willis: Lalich George | 1977 | 1 |
| RHR International | 1978 | 239 |
| Segal, Mccambridge, Singer & Mahoney | 1978 | 1 |
| Williams Montgomery & John Ltd. | 1978 | 1 |
| Marengo, Paul C, JD | 1979 | 2 |
| Transworld Business Advisors of Chicago Downtown | 1979 | - |
| UniCare Insurance Co. | 1979 | 2 |
| Bmo Capital Markets Gkst Inc. | 1980 | 39 |
| Davis McGrath LLC | 1980 | 1 |
| Griffin Kbik Stephens Thompson | 1980 | 16 |
| Seyfath Shaw LLP | 1980 | 1 |
| Chicago First Dates | 1982 | 1 |
| Heidrick Partners, Inc., The | 1982 | - |
| Liam Ventures | 1982 | 5 |
| Lv Ventures Inc | 1982 | 14 |
| The John Buck Co | 1982 | 30 |
| Catherine M. Masters | 1983 | 1 |
| Navigant Consulting, In. | 1983 | 1 |
| Sidney Berger, Attorney | 1983 | 1 |
| Weiss Financial Inc | 1983 | 3 |
| Cargill Investor Service | 1984 | 21 |
| Charles H Shaw Co | 1984 | 1 |
| Illinois Finance Authority | 1984 | 7 |
| John G. Murphy | 1984 | 1 |
| Tower Catering | 1984 | 1 |
| Blueprint Technology Solutions | 1985 | 1 |
| Fact Flow Research | 1985 | 8 |
| Latham & Watkins LLP | 1985 | 133 |
| Purohit Navigation | 1985 | 58 |
| Segal, Mccambridge, Singer & Mahoney | 1985 | 1 |
| Starbucks | 1985 | 8 |
| Willis Towers Watson | 1985 | 2 |
| Electrical & Computer Engineering Department Heads Association | 1986 | 1 |
| Hardin Schiff Foundation | 1986 | 1 |
| Segal Maccambridge Singer | 1986 | 6 |
| Segal McCambridge Singer & Mahoney, Ltd. | 1986 | 222 |
| Segal McCambridge Singer & Mahoney, Ltd. | 1986 | 117 |
| Tressler LLP | 1986 | 373 |
| Tressler Soderstrom Maloney: Baldwin Shaun M P | 1986 | 14 |
| Aizenstein- Neal Attorney | 1987 | - |
| Eadies Kitchen and Market | 1987 | 2 |
| Gray- Steven J. Attorney | 1987 | - |
| Stephen W Workman PC | 1987 | 1 |
| Vi Senior Living | 1987 | 144 |
| Gronek & Associates | 1988 | 1 |
| Marshall, Gerstein & Borun LLP | 1988 | 246 |
| Sonnenschein Nath & Ros. | 1988 | 205 |
| Sonnenschein Nath & Rosenthal | 1988 | 34 |
| Ernst & Young LLP | 1989 | 838 |
| Willis Towers Watson, Mergers & Acquisitions Group | 1989 | 1 |
| Kevin L. Kolton | 1990 | 1 |
| Seyfarth Shaw At Work; Workright Solutions | 1990 | 1 |
| Trizec Properties, Inc. | 1990 | 6 |
| United Airlines, Inc. | 1990 | 3 |
| Air Wis Services Inc | 1991 | 2 |
| Altour | 1991 | 1 |
| Anthem, Inc. | 1991 | 1 |
| Bandon Dunes L.P., a Limited Partnership of Delaware | 1991 | 1 |
| CBRE Group, Inc. | 1991 | 5 |
| Law Offices of Suzanne Derath | 1991 | 1 |
| William M. Ejzak, Attorney-At-Law | 1991 | 1 |
| Bain & Company, Inc. | 1992 | 18 |
| Celtic Insurance Company | 1992 | 113 |
| Chicago City Capital Group Inc | 1992 | 2 |
| Chicago Technology Law LLC | 1992 | 1 |
| Event Network, INC | 1992 | 4 |
| Fidessa Corporation | 1992 | 10 |
| John Claiborne Koski | 1992 | 1 |
| Monitor Liability Managers, Inc. | 1992 | 130 |
| Oracle U.S.A., Inc. | 1992 | 1 |
| Scott Michael Gettleson | 1992 | 1 |
| W.R. Berkley Corp. | 1992 | 1 |
| Berkley Select | 1993 | - |
| Genesis Recruiting | 1993 | 1 |
| Richmond Breslin LLP | 1993 | 4 |
| Trizechahn Park Meadows Mall LLC | 1993 | - |
| Uni Care Life & Health Insurance Co | 1993 | 42 |
| United Airllines | 1993 | 1 |
| American Capital | 1994 | 4 |
| Lawrence M Mack | 1994 | - |
| Legal Helpers Debt Resolution, LLC | 1994 | 1 |
| Netgenesis Corporation | 1994 | 5 |
| Nimmo Anthony | 1994 | 1 |
| Shirley A Irwin | 1994 | 1 |
| Amherst Partner | 1995 | 1 |
| Chicago Flower Delivery | 1995 | 1 |
| Coghill Capital Management | 1995 | 18 |
| Cognitor, Inc. | 1995 | 11 |
| Faegre Baker Daniels LLP | 1995 | - |
| Ing (U.S.) Securities, Futures & Options Inc. | 1995 | - |
| Kelly Anne Burden | 1995 | 1 |
| Lfg, L.L.C. | 1995 | 3 |
| Rodman & Renshaw, Inc. | 1995 | - |
| A D G Group Inc | 1996 | 2 |
| As&K Communications, Inc | 1996 | 3 |
| Barbara's Bestsellers | 1996 | 5 |
| Binswanger | 1996 | 1 |
| Daniel P Coffey & Assoc Ltd | 1996 | 8 |
| Eurex | 1996 | 29 |
| Mayubas Bookstores INC | 1996 | 2 |
| Professional Investment | 1996 | 1 |
| Staples Financial Inc | 1996 | 2 |
| Steger Ip, LLC | 1996 | 1 |
| T H Tower Leasing | 1996 | 3 |
| Tucker Ellis LLP | 1996 | 1 |
| United Continental Holdings, Inc. | 1996 | 1 |
| Venice Café Willis Tower | 1996 | 4 |
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