Company: CIB
Filing Date: 2025-08-06
Form Type: 6-K
Source: 0002058897-25-000029
Chunk: 24

Company: Grupo Cibest S.A.
Filing Date: 2025-08-06
Form: 6-K
Chunk 24
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 |     |    4.46 |     | % |

| 25 |

| 2Q25 |

#### ANNEX 1

### DETAILS OF CORPORATE STRUCTURE EVOLUTION OPERATIONS
<div align='center'>(Amounts expressed in millions of Colombian pesos)</div>

On October 29, 2024, the Bank announced to the market that its Board of Directors had authorized management to proceed with the steps necessary to modify the corporate structure of Grupo Bancolombia and its subsidiaries, through the creation of a parent company named Grupo Cibest S.A. (“Cibest”), and the completion of a series of corporate operations to achieve this goal.

The changes in the corporate structure included the following corporate operations (the “Corporate Operations”) which, after obtaining the required regulatory approvals in Colombia and the Group’s various jurisdictions, were approved by the Shareholders’ Meetings of the entities involved. This process included an extraordinary meeting of the Bank’s Shareholders’ Assembly held on April 23, 2025, with the participation of holders of common shares and holders of preferred dividend shares without voting rights. The approved corporate operations were as follows:

i. Partial spin-off of Bancolombia (Panama) S.A. in favor of the Beneficiary Company BC Panama S.A.S.

ii. Merger by absorption by the Bank of the Beneficiary Company BC Panama S.A.S.

iii. Partial spin-off of Banca de Inversión Bancolombia S.A. Corporación Financiera in favor of the Bank.

iv. Partial spin-off of the Bank in favor of Cibest.

Corporate Operations (ii), (iii), and (iv) were authorized by the Colombian Financial Superintendence through Resolutions No. 0356 of 2025 dated February 28, 2025, and 0901 dated May 7, 2025.

The notice of merger by absorption and partial spin-off of the Bank was published on January 13, 2025. Changes to the corporate structure were formalized on May 12, 2025, through public deed No. 386 of Notary Thirty of Medellin, and on May 16, 2025—the date of completion of the operation—the Bank’s shareholders (except for Cibest) became shareholders of Cibest. Cibest issued, in their name, the same number and types of shares (common shares and preferred dividend shares without voting rights), preserving the terms and conditions previously held in the Bank