EXHIBIT 99.1 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM The Board of Directors and Audit Committee PrivateBancorp, Inc. We have reviewed the accompanying consolidated balance sheet of PrivateBancorp, Inc. as of June 30, 2004, and the related consolidated statements of income, changes in stockholders' equity and cash flows for the three and six month periods ended June 30, 2004 and 2003. These financial statements are the responsibility of the Company's management. We conducted our reviews in accordance with standards of the Public Company Accounting Oversight Board (United States). A review of interim financial information consists principally of applying analytical procedures to financial data, and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with auditing standards generally accepted in the United States, which will be performed for the full year with the objective of expressing an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion. Based on our reviews, we are not aware of any material modifications that should be made to the accompanying consolidated financial statements referred to above for them to be in conformity with U.S. generally accepted accounting principles. We have previously audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheet of PrivateBancorp, Inc. as of December 31, 2003, and the related consolidated statements of income, changes in shareholders' equity and cash flows for the year then ended not presented herein, and in our report dated January 16, 2004, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying consolidated balance sheet as of December 31, 2003, is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived. /s/ Ernst & Young LLP Chicago, Illinois August 6, 2004