UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED): MAY 26, 2005 WINTRUST FINANCIAL CORPORATION (Exact name of registrant as specified in its charter) ----------------------------- ILLINOIS 0-21923 36-3873352 (State or other jurisdiction of (Commission File Number) (I.R.S. Employer Identification No.) Incorporation) 727 NORTH BANK LANE 60045 LAKE FOREST, ILLINOIS (Zip Code) (Address of principal executive offices) Registrant's telephone number, including area code (847) 615-4096 NOT APPLICABLE (Former name or former address, if changed since last year) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) ITEM 1.01. ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT. On May 26, 2005, the Board of Directors of Wintrust Financial Corporation (the "Company") approved an amendment (the "Amendment") to the Rights Agreement, dated as of July 28, 1998 (the "Rights Agreement"), between the Company and Illinois Stock Transfer Company, as rights agent, relating to the common stock of the Company (the "Common Stock"), and pursuant to which certain rights (the "Rights") were awarded to the holders of Common Stock, to change the Final Expiration Date (as defined in the Rights Agreement) from July 31, 2008 to June 30, 2005. As a result of this amendment, the preferred share purchase rights granted under the Rights Agreement will expire on June 30, 2005, and the Rights Agreement will terminate. A copy of the Amendment to Rights Agreement is attached as Exhibit 4.1 hereto and incorporated herein by reference. ITEM 3.03. MATERIAL MODIFICATIONS TO RIGHTS OF SECURITY HOLDERS. The information included in Item 1.01 above is incorporated into this Item 3.03 in its entirety. ITEM 8.01. OTHER EVENTS. On May 26, 2005, Wintrust Financial Corporation issued a press release announcing that its Board of Directors has approved an amendment to the Company's existing shareholder rights plan. As a result of this amendment, the preferred share purchase rights granted under the Rights Agreement will expire on June 30, 2005, and the Rights Agreement will terminate. The press release is attached as Exhibit 99.1 hereto and incorporated herein by reference. ITEM 9.01. EXHIBITS. (c) Exhibits. EXHIBIT NUMBER DESCRIPTION ------- -------------------------------------------------- 4.1 Amendment, dated as of May 26, 2005, to Rights Agreement, dated as of July 28, 1998, between Wintrust Financial Corporation and Illinois Stock Transfer Company, as rights agent. 99.1 Press Release dated May 26, 2005. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. WINTRUST FINANCIAL CORPORATION (Registrant) By: /s/ David A. Dykstra ----------------------------------- David A. Dykstra Senior Executive Vice President and Chief Operating Officer Date: May 26, 2005 2 INDEX TO EXHIBITS ----------------- Exhibit - ------- 4.1 Amendment, dated as of May 26, 2005 to the Rights Agreement, dated as of July 28, 1998, between Wintrust Financial Corporation and Illinois Stock Transfer Company, as rights agent. 99.1 Press Release, dated May 26, 2005.