Company: CIB
Filing Date: 2025-05-15
Form Type: POS AM
Source: 0001193125-25-120631
Chunk: 0

Company: Grupo Cibest S.A.
Filing Date: 2025-05-15
Form: POS AM
Chunk 0
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As filed with the U.S. Securities and Exchange Commission on May 15, 2025 Registration Statement No. 333-283549 U.S. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM F-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Grupo Cibest S.A. (Exact Name of Registrant as Specified in its Charter) N/A (Translation of Registrant’s Name into English)

| Republic of Colombia            |     |                         6029 |     | Not Applicable     |
| (State or Other Jurisdiction of 
 Incorporation or Organization)  |     | -Primary Standard Industrial 
   Classification Code Number |     | -I.R.S. Employer   
 Identification No. |

Carrera 48 

# 26-85,Avenida Los Industriales Medellín, Colombia Telephone: +57 604 4041918 (Address and telephone number of Registrant’s principal executive offices) Puglisi & Associates 850 Library Avenue, Suite 204 Newark, Delaware 19711 Telephone: (302) 738-6680 (Name, address and telephone number of agent for service) Copies to: Sergio J. Galvis, Esq. Patrick S. Brown, Esq. Sullivan & Cromwell LLP 125 Broad Street New York, New York 10004 Telephone: (212) 558-4000 Facsimile: (212) 558-3588
EXPLANATORY NOTE

This Post-Effective Amendment No. 1 filed by Grupo Cibest S.A., or the Registrant, a stock company (sociedad anónima)
organized under the laws of the Republic of Colombia, relates to the Registration Statement on Form F-4 (Registration No. 333-283549) of Bancolombia S.A., a stock
company (sociedad anónima) organized under the laws of the Republic of Colombia (“Bancolombia”), and is being filed by the Registrant in order to adopt such Registration Statement as its own for all purposes under the U.S.
Securities Act of 1933, as amended, or the Securities Act. Such Registration Statement, which was declared effective on March 21, 2025, was filed by Bancolombia on behalf of the Registrant to register the offering of the Registrant’s
common and preferred shares (including preferred shares in respect of