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 June, 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.

June 9, 2025

Medellín, Colombia

GRUPO CIBEST S.A. ANNOUNCES DECISIONS ADOPTED IN ITS SHAREHOLDERS' MEETING

Grupo Cibest S.A. (“Grupo Cibest”) announced that, at the Extraordinary Shareholders' Meeting held today, the following decisions were adopted with the required majorities:

1.Election of the Board of Directors for the period June 2025 - March 2027

2.Approval of the remuneration of the Board of Directors.

3.Approval of the change in the purpose of the legal reserve, of the creation of a reserve for the repurchase of shares, and of a share repurchase program.

The management of Grupo Cibest confirms that the necessary procedures and authorizations were completed to hold the Extraordinary General Shareholders' Meeting, and that the decisions adopted fall within the powers of the Extraordinary General Shareholders’ Meeting in accordance with applicable law and Grupo Cibest’s Bylaws.

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