Report of Foreign Issuer Pursuant to Rule 13a-16 or 15d-16 (6-k)

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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 April 2023

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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​	BANCOLOMBIA S.A. (Registrant) ​
Date April 03, 2023	By:	/s/ JOSE HUMBERTO ACOSTA MARTIN.
​	Name:	Jose Humberto Acosta Martin.
​	Title:	Vice President of Finance

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April 03, 2023

Medellín, Colombia

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BANCOLOMBIA S.A. ANNOUNCES FILING OF THE 2022 ANNUAL REPORT ON FORM 20-F

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Bancolombia S.A. (NYSE: CIB) announces that it has filed its annual report on Form 20-F for the year ended December 31, 2022 with the U.S. Securities and Exchange Commission – SEC.

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The annual report can be downloaded from the SEC website www.sec.gov and in the following days will also be made available on Bancolombia’s website in the Investor Relations section.

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If you need a hard copy of our Form 20-F, please contact [e-mail].

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Contacts	​	​	​
Mauricio Rosillo Rojas	Jose Humberto Acosta	Catalina Tobon Rivera	​
Corporate VP	Financial VP	IR Director	​
Tel.: [phone]	Tel.: [phone]	Tel: [phone]	​

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