Company: CIB
Filing Date: 2025-05-20
Form Type: 6-K
Source: 0002058897-25-000009
Chunk: 0

Company: Grupo Cibest S.A.
Filing Date: 2025-05-20
Form: 6-K
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549
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#### FORM 6-K
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### REPORT OF FOREIGN PRIVATE ISSUER

#### PURSUANT TO RULE 13a-16 OR 15d-16 OF

#### THE SECURITIES EXCHANGE ACT OF 1934

#### For the month of May,2025

#### Commission File Number 001-42656
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#### Grupo Cibest S.A.
<div align='center'>(Translation of registrant’s name into English)

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#### Cra. 48 # 26-85

#### Medellín, Colombia
<div align='center'>(Address of principal executive offices)

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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-Fþ |     | Form 40-Fo |

| 1 |

### 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.

| Date May 19, 2025 |     | Grupo CIBEST S.A. 
 (Registrant)      
 By:               |     | /s/ MAURICIO BOTERO WOLFF.             |
|:------------------|:----|:------------------|:----|:---------------------------------------|
|                   |     | Name:             |     | Mauricio Botero Wolff                  |
|                   |     | Title:            |     | Vice President of Strategy and Finance |

May 19, 2025

M edellín, Colombia

<div align='center'>GRUPO CIBEST S.A. ANNOUNCES THAT IT HAS STARTED A LIQUIDITY PROGRAM IN COLOMBIA WITH CREDICORP CAPITAL COLOMBIA FOR ITS ORDINARY AND PREFERRED SHARES</div>

Grupo Cibest S.A. announces that, in accordance with the provisions of Article 2.9.17.1.8 of Colombian Decree 2555 of 2010, it has contracted a liquidity program in Colombia for its common shares and its preferred shares without voting rights, under a contract with Credicorp Capital Colombia.