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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 2024

Commission File Number 001-32535

Bancolombia 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.

Form 20-F þ                    Form 40-F ◻

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):___

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(2):___

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 þ

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-                    .

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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.

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May 3, 2024

Medellín

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BANCOLOMBIA S.A. ANNOUNCES THE RESIGNATION OF A MEMBER OF THE BOARD OF DIRECTORS

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Bancolombia S.A. announces that Mr. Gonzalo Alberto Pérez Rojas resigned as a member of the Board of Directors effective May 1, 2024.

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The Board of Directors, the President and Grupo Bancolombia’s employees express their special

recognition and gratitude to Mr. Pérez for his dedication and commitment as a Board Member for more than 20 years. His personal and professional qualities contributed to the enhancement of the sustainability and business success of the Company.

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The appointment of a new member of the Board of Directors will be made at the General

Shareholders Meeting.

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