================================================================================ 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): December 13, 2006 WESTBANK CORPORATION ------------------------------------------------------ (Exact name of registrant as specified in its charter) Massachusetts 0-12784 04-2830731 ---------------------------- ------------ ------------------- (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 225 Park Avenue, West Springfield, Massachusetts 01089 ------------------------------------------------ ---------- (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (413) 747-1400 Not Applicable -------------------------------------------------------------- (Former name or former address, if changed since last report.) 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 (see General Instruction A.2. below): [ ] 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 December 13, 2006, the shareholders of Westbank Corporation (the "Corporation") approved the Agreement and Plan of Merger (the "Merger Agreement") dated July 18, 2006 by and among NewAlliance Bancshares, Inc. ("NAL"), its wholly owned subsidiary NewAlliance Bank, the Corporation and Westbank, the Corporation's wholly owned subsidiary. Pursuant to the Merger Agreement, the Corporation will merge with and into NAL, and Westbank will merge with and into NewAlliance Bank upon the satisfaction of all conditions to the consummation of the mergers. As of this date, the parties to the Merger Agreement have received relevant approvals from the Federal Reserve Bank of Boston, the Federal Deposit Insurance Corporation and the Connecticut Commissioner of Banking. Approvals of the Massachusetts Board of Bank Incorporation and the Massachusetts Division of Banks are pending, and the Corporation is not aware of any reason why those approvals should not be forthcoming in due course. The Corporation expects that all conditions will be satisfied and expects to close on the mergers on or about January 2, 2007. SIGNATURES 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. Dated: December 19, 2006 WESTBANK CORPORATION By: /s/ John M. Lilly ----------------------- Name: John M. Lilly Title: Treasurer and Chief Financial Officer