As filed with the Securities and Exchange Commission on December 6, 2006 Registration No. 333-134153 ================================================================================ SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ---------- FORM S-4 POST EFFECTIVE AMENDMENT NO. 1 TO REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ---------- GLACIER BANCORP, INC. (Exact name of registrant as specified in its charter) MONTANA 6022 81-0519541 (State or other jurisdiction of (Primary standard industrial (I.R.S. employer incorporation or organization) classification code number) identification no.) 49 COMMONS LOOP, KALISPELL, MONTANA 59901 (406) 756-4200 (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) ---------- MICHAEL J. BLODNICK President and Chief Executive Officer 49 Commons Loop Kalispell, Montana 59901 (406) 756-4200 (Name, address, including zip code, and telephone number, including area code, of agent for service) ---------- Copies of communications to: STEPHAN M. KLEIN KIMBERLY F. STEPHAN Graham & Dunn P.C. Pier 70, 2801 Alaskan Way, Suite 300 Seattle, Washington 98121 ================================================================================ DEREGISTRATION OF UNISSUED SECURITIES The Registration Statement of Glacier Bancorp, Inc. ("Glacier") on Form S-4 declared effective on May 24, 2006, Commission File No. 333-134153 (the "Registration Statement"), provided for the issuance of up to 1,300,000 shares of Glacier's common stock. These securities were registered for issuance in accordance with the Plan and Agreement of Merger to acquire Citizens Development Company dated April 20, 2006, (the "Agreement") described in the Registration Statement. Pursuant to the exchange formula in the Agreement, 952,143 shares of Glacier's common stock were exchanged, leaving 347,857 shares registered but unissued. No further securities are to be exchanged pursuant to the Agreement. Accordingly, Glacier hereby deregisters 347,857 shares not exchanged pursuant to the Agreement. SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this Post-Effective Amendment No. 1 to this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Kalispell, State of Montana, on December 6, 2006. GLACIER BANCORP, INC. (Issuer) By: /s/ Michael J. Blodnick ------------------------------------ Michael J. Blodnick President and Chief Executive Officer Pursuant to the requirements of the Securities Act of 1933, this Post Effective Amendment No. 1 to the registration statement has been signed by the following persons in the capacities indicated on this 6th day of December 2006. SIGNATURE TITLE --------- ----- PRINCIPAL EXECUTIVE OFFICER /s/ Michael J. Blodnick President and Chief ------------------------------------- Executive Officer, Director Michael J. Blodnick PRINCIPAL FINANCIAL OFFICER /s/ James H. Strosahl Executive Vice President and ------------------------------------- Chief Financial Officer James H. Strosahl (Principal Accounting Officer) * A Majority of the Board of Directors John S. MacMillan James M. English Jon W. Hippler L. Peter Larson Allen J. Fetscher Craig A. Langel *By: /s/ Michael J. Blodnick -------------------------------- Michael J. Blodnick (Attorney-in-Fact and Designated Agent for Service)