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): September 12, 2005 ------------------ FIRST NIAGARA FINANCIAL GROUP, INC. -------------------------------------------------- (Exact Name of Registrant as Specified in Charter) Delaware 000-23975 42-1556195 - ---------------------------- --------------------- ------------------- (State or Other Jurisdiction (Commission File No.) (I.R.S. Employer of Incorporation) Identification No.) 6950 South Transit Road, P.O. Box 514, Lockport, New York 14095-0514 - --------------------------------------------------------- ---------- (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code: (716) 625-7500 -------------- Not Applicable -------------- (Former name or former address, if changed since last report) Check the appropriate box below if the Form 8-K 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 8.01 Other Events. On September 12, 2005, First Niagara Financial Group, Inc. (the "Company") issued a press release disclosing that it has acquired Burke Group, Inc., an employee benefits administration and compensation consulting firm that has offices in Rochester and Syracuse and serves clients throughout First Niagara's upstate New York footprint. Under agreement by both parties financial terms of the acquisition were not disclosed. A copy of the press release is filed as exhibit 99.1 to this report. Item 9.01 Financial Statements and Exhibits (a) Not Applicable. (b) Not Applicable. (c) Exhibits. Exhibit No. Description ----------- ----------- 99.1 Press release dated September 12, 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. FIRST NIAGARA FINANCIAL GROUP, INC. DATE: September 12, 2005 By: /s/ John R. Koelmel -------------------------------- John R. Koelmel Chief Financial Officer (Duly authorized representative)