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 August 2005 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: August 4, 2005 By /s/ JAIME ALBERTO VELASQUEZ B. ---------------------------------- Name: Jaime Alberto Velasquez B. Title: Vice President of Finance [BANCOLOMBIA LETTERHEAD] PRINCIPAL SHAREHOLDERS OF BANCOLOMBIA AFTER THE MERGER In accordance with request 20058-78 issued by the Superintendency of Securities of Colombia, we hereby disclose the 20 largest shareholders of Bancolombia after the merger, indicating the number of common and preferred shares of the bank each of them currently holds and showing the approximate number of shares of Bancolombia they have the right to receive in exchange for the shares they held in Conavi Banco Comercial y de Ahorros S.A. and Corporacion Financiera Nacional Y Suramericana S.A. Corfinsura (post spin-off), as a result of the merger. APPROXIMATE NUMBER OF SHARES OF BC APPROXIMATE TO BE RECEIVED APPROXIMATE PERCENTAGE ID COMMON PREFERRED IN THE TOTAL SHARES OWNERSHIP OF NAME NUMBER SHARES OF BC SHARES OF BC EXCHANGE BC BC BIC ADR PROGRAM FIDUBIC 811001966 106,162,095 106.162.095 14,59% PORTAFOLIO DE INVERSIONES SURAMERICANA S.A 811011258 50.846.918 -- 25.289.748 76.136.666 10,46% SURAMERICANA DE INVERSIONES S.A SURAMERICANA 811012271 33.890.197 -- 26.848.528 60.738.725 8,35% FIDEICOMISO CITITRUST- SURAMERICANA-IFC 830054054 39.341.408 39.341.408 5,41% CIA. DE CEMENTO ARGOS S.A 890900266 22.713.097 3,386,177 8.734.574 34.833.848 4,79% CEMENTOS DEL VALLE S.A 890300437 29.658.125 4,120,038 951.126 34.729.289 4,77% FONDO DE PENSIONES OBLIGATORIAS PROTECCION 800229739 5.554.187 22,856,020 243.210 28.653.417 3,94% INVERSIONES SPC S.A 811033992 26.626.931 26.626.931 3,66% EMMERY EQUITY CORPORATION 830064913 24,387,619 24,387,619 3.35% HOLDING MERCANTIL COLOMBIANA C.A 830018206 22,386,979 22,386,979 3.08% LORANGE INDUSTRIAL CORPORATION 830064912 20,612,331 20,612,331 2.83% IN VALKIRIA Y CIA S EN C 811046705 7,434,799 -- 8,069,420 15,504,219 2.13% CIA. SURAMERICANA DE CONSTRUCCIONES S.A 890903406 7,864,587 -- 3,860,233 11,724,820 1.61% CIA. SURAMERICANA DE SEGUROS S.A 890903407 2,987,671 -- 6,658,481 9,646,152 1.33% INTERNATIONAL FINANCE CORPORATION-IFC 830053770 9,358,802 9,358,802 1.29% FONDO DE PENSIONES OBLIGATORIAS HORIZONTE 800231967 4,342,711 2,771,775 2,038,095 9,152,581 1.26% CONSTRUCCIONES E INVERSIONES LA PAULITA SA 811031355 9,012,780 9,012,780 1.24% INVERSIONES ALASKA S.A 830505757 9,012,780 9,012,780 1.24% MERCANTIL INVERSIONES Y VALORES 830131174 8,629,735 8,629,735 1.19% FONDO DE PENSIONES OBLIGATORIAS COLFONDOS 800227940 2,756,816 3,961,738 978,910 7,697,464 1.06% Approximate total number of shares of BANCOLOMBIA (Not accounting for cash payments for fractional shares) 727,829,109 * In accordance with the Meger Agreement approved by the General Shareholders' Meetings of the merged entities, shareholders of Conavi and Corfinsura are able to choose the class of shares of Bancolombia (common or non voting preferred shares) to be received in the exchange for their Conavi or Corfinsura shares within the three months following the completion of the merger. The three-month term established for the share exchange started on August 1, 2005 and ends on October 31, 2005. Once this term has expired, shareholders of Conavi and Corfinsura who did not exercise their right to choose the class or shares of Bancolombia to be received in the exchange will receive common shares. Additionally, the number of shares of Bancolombia used as a base for the preparation of this information does not take into account cash payments for the fractional shares of Bancolombia that result from the exchange. For the foregoing reasons, the information hereby disclosed represents an estimate. The capital structure of BANCOLOMBIA post-merger, the number of outstanding shares and the total number of ordinary and preferred shares can only be known once the share exchange term has expired. ** This information is based on Bancolombia's capital structure at July 11, 2005 and Conavi's and Corfinsura's capital structure at July 29, 2005. *** In accordance with the requirement of the Superintendency of Securities, this information corresponds to the 20 largest shareholders of Bancolombia, considered individually, and does not take into account the beneficial owners of these shares.