6-K

UNITED STATES

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 1934

For the month of May,2025

Commission File Number 001-42656

Grupo Cibest S.A.

(Translation of registrant’s name into English)

Cra. 48 # 26-85

Medellín, 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.

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.

May 19, 2025

Medellín, Colombia

GRUPO CIBEST S.A. ANNOUNCES THAT IT HAS STARTED A LIQUIDITY PROGRAM IN COLOMBIA WITH CREDICORP CAPITAL COLOMBIA FOR ITS ORDINARY AND PREFERRED SHARES

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.

This program seeks to increase the number of transactions involving Grupo Cibest’s shares through purchase and sale orders entered by Credicorp Capital Colombia in the stock market, enabling price formation.

These mechanisms contribute to promoting liquidity and mitigating volatility in stock trading, facilitating market entry and exit mechanisms for investors.

Contacts