CONFORMED COPY SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1933 For the month of December 2006 BANCOLOMBIA S.A. ---------------- (Translation of Registrant's name into English) Calle 50 No. 51-66 Medellin, Colombia ------------------ (Address of principal executive offices) (Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.) Form 20-F [X] Form 40-F [ ] (Indicate by check mark whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.) Yes[ ] No [X] (If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-______________.) This Report on Form 6-K shall be incorporated by reference into the registrant's registration statement on Form F-3 (File No. 001-32535). 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, thereunto duly authorized. BANCOLOMBIA S.A. (Registrant) Date: December 21, 2006 By /s/ JAIME ALBERTO VELASQUEZ B. ----------------------------------------- Name: Jaime Alberto Velasquez B. Title: Vice President of Finance CIB LISTED NYSE [BANCOLOMBIA LOGO] BANCOLOMBIA PURCHASES MORTGAGE-BACKED TIPS MEDELLIN, COLOMBIA, DECEMBER 21, 2006 BANCOLOMBIA S.A. announces that today it purchased mortgage-backed TIPS, fixed rate in Pesos, in a public offering made by Titularizadora Colombiana S.A. The purchase amounts to Ps. 223,234,800,000. Below are the details of the purchased securities: Type Rate Value (Ps) ---------------------- ----------- ----------------- TIPS Pesos E-2 A 2016 8.84% EA 199.486.400.000 TIPS Pesos E-2 A 2021 10.00% EA 6.332.900.000 TIPS Pesos E-2 B 2021 11.00% EA 15.832.300.000 TIPS Pesos E-2 MZ 2021 12.00% EA 1.583.200.000 Total 223.234.800.000 CONTACTS SERGIO RESTREPO JAIME A. VELASQUEZ MAURICIO BOTERO EXECUTIVE VP FINANCIAL VP IR MANAGER TEL.: (574) 5108668 TEL.: (574) 5108666 TEL.: (574) 5108866