Company: CIB
Filing Date: 2025-05-16
Form Type: 8-K12B
Source: 0001193125-25-121701
Chunk: 1

Company: Grupo Cibest S.A.
Filing Date: 2025-05-16
Form: 8-K12B
Chunk 1
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 With the effectiveness of the Corporate Structure Changes, the rights of shareholders of Grupo Cibest will continue to be governed by Colombian corporate law and Grupo Cibest’s bylaws, which are described in more detail in the Registration Statement on Form F-4(File No. 333-283549)(the “Registration Statement”) filed by Bancolombia on December 2, 2024, as amended by Amendment No. 1 filed by Bancolombia on March 19, 2025 and declared effective by the U.S. Securities and Exchange Commission (the “SEC”) on March 21, 2025, as amended by Post-EffectiveAmendment No. 1 to the Registration Statement (as so amended, the “Registration Statement”). Further information relating to the Grupo Cibest common and preferred shares is described under the caption “Description of Grupo Cibest’s Capital Stock” in the Registration Statement and is incorporated herein by reference. The rights of the holders of Grupo Cibest ADSs will be governed by a Deposit Agreement (the “Deposit Agreement”) dated the date hereof between Grupo Cibest and The Bank of New York Mellon (the “Depositary”), which made certain amendments to the previous deposit agreement between Bancolombia and the Depositary which governed the rights of holders of Bancolombia ADSs. A form of the Deposit Agreement is attached to the Form F-6(File No. 333-286996)filed with the SEC by the Depositary and Grupo Cibest on May 6, 2025. Further information relating to the Grupo Cibest ADSs is described under the caption “Description of Grupo Cibest American Depositary Shares” in the Registration Statement and is incorporated herein by reference. In addition, the directors and executive officers of Grupo Cibest immediately after the Corporate Structure Changes were the same individuals who were directors and executive officers, respectively, of Bancolombia disclosed in Bancolombia’s most recent Annual Report on Form 20-Ffor the fiscal year ended December 31, 2024. Grupo Cibest and Bancolombia are each a “foreign private issuer” (as such term is defined in Rule 3b-4under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)). Pursuant to Rule 12g-3(a)under the Exchange Act, this Report on Form 6-Kis being filed using the EDGAR format type 8-K12B