Grupo Cibest (CIB) clears COP 1.35T authorization for 2026 share buyback

Rhea-AI Filing Summary

Grupo Cibest S.A. reported that its Ordinary General Shareholders’ Meeting approved a new 2026 share buyback program and related corporate actions. The company will transfer COP 431,418,157,024.55 from its legal reserve into a specific reserve to fund repurchases previously approved at a June 9, 2025 extraordinary meeting.

The shareholders authorized a 2026 Share Buyback Program of up to COP 1,350,000,000,000 over three years, starting when the Board of Directors approves detailed regulations. The Board and management received broad powers to structure, authorize and execute transactions on equal terms for all shareholders, while retaining discretion not to implement the program if internal or market conditions are deemed unsuitable.

Insights

Equity capital markets analyst

Grupo Cibest gains flexibility with a sizeable, discretionary buyback authorization.

The General Shareholders’ Meeting approved a 2026 share buyback program of up to COP 1,350,000,000,000 for a three-year period, alongside a transfer of COP 431,418,157,024.55 from the legal reserve into a buyback reserve. These actions expand the company’s toolkit for returning capital.

The Board of Directors will design the 2026 regulations, define execution mechanisms, and ensure equal conditions across shareholders, while management handles permits and implementation. Importantly, the program is discretionary: Grupo Cibest is not obliged to execute it if internal or market conditions are considered inadequate, so actual repurchase volumes will depend on future decisions.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM 6-K

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REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 OF

THE SECURITIES EXCHANGE ACT OF 1934

For the month of March, 2026

Commission File Number 001-42656

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Grupo Cibest S.A.

(Translation of registrant’s name into English)

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Cra. 48 # 26-85

Medellín, Colombia

(Address of principal executive offices)

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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 o

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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.

			Grupo CIBEST S.A. (Registrant)
Date March,24,2026			By:			/s/ MAURICIO BOTERO WOLFF.
			Name:			Mauricio Botero Wolff
			Title:			Vice President of Strategy and Finance

March 24, 2026

Medellin, Colombia

GRUPO CIBEST S.A. ANNOUNCES APPROVAL OF SHARE BUYBACK PROGRAM

Grupo Cibest S.A. (“Grupo Cibest”) announced that, at today’s Ordinary General Shareholders’ Meeting, the following decisions were approved with the required majorities:

1.To transfer the amount of four hundred thirty-one thousand four hundred eighteen million one hundred fifty-seven thousand twenty-four Colombian pesos and fifty-five cents (COP 431,418,157,024.55) from the legal reserve, to be added to the reserve for executing the share repurchase program approved at the extraordinary shareholders’ meeting held on June 9, 2025.

2.To authorize the termination of the 2025 Share Buyback Program approved at the extraordinary shareholders’ meeting held on June 9, 2025 (the “2025 Share Buyback Program”) on the date the Board of Directors approves the regulations of the 2026 Share Buyback Program.

3.To authorize the 2026 share buyback program for up to one trillion three hundred fifty billion Colombian pesos (COP 1,350,000,000,000), for a term of three (3) years (the “2026 Share Buyback Program”) as from the date of approval of the regulations of the 2026 Share Buyback Program by the Board of Directors. There will be no minimum amount of securities to be acquired under the Buyback Program.

4.The granting of powers to the Board of Directors of Grupo Cibest to regulate the 2026 Share Buyback Program (the “2026 Regulation”), and to define and approve its terms and conditions, including, but not limited to, the mechanism through which the transactions or orders forming part of the 2026 Share Buyback Program shall be executed, including the procedure for each stage, and, in general, to carry out all actions and activities aimed at implementing the 2026 Share Buyback Program under the terms of the 2026 Regulations and in accordance with applicable regulations. The buyback shall be carried out through mechanisms that ensure equal conditions for all shareholders, and the buyback price for each class of shares shall be set in compliance with the regulations in force.

5.The granting of powers to the management of Grupo Cibest to enter into all legal acts necessary and/or convenient to implement and perfect the 2026 Share Buyback Program; to carry out all

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other actions necessary and/or convenient to execute the 2026 Share Buyback Program, including but not limited to obtaining permits from administrative authorities that may be required to carry out the buyback; and, in general, to carry out any other activity associated with or related to the 2026 Share Buyback Program, under the terms set forth in the 2026 Regulation.

Additionally, the General Shareholders' Meeting approved that in the event that management considers that the appropriate internal or market conditions are not met to carry out the Buyback Program, Grupo Cibest will not be obliged to implement, in whole or in part, the 2026 Buyback Program.

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

Contacts

Mauricio Botero Wolff			Catalina Tobón Rivera
Strategy and Financial VP			IR Director
Tel.: (57 604) 4040858			Tel.: (57 601) 4885950
ir@Grupocibest.com.co			ir@Grupocibest.com.co

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FAQ

What did Grupo Cibest (CIB) approve regarding its 2026 share buyback program?

Grupo Cibest’s shareholders approved a 2026 share buyback program for up to COP 1,350,000,000,000 over three years. The program will begin once the Board of Directors approves detailed regulations governing how repurchases are executed and under what conditions.

How is Grupo Cibest funding its share repurchase reserve?

The meeting approved transferring COP 431,418,157,024.55 from the legal reserve into the reserve used to execute the share repurchase program. This reallocation increases funds specifically earmarked for buybacks previously authorized at the June 9, 2025 extraordinary shareholders’ meeting.

What happens to Grupo Cibest’s 2025 share buyback program?

The 2025 Share Buyback Program will terminate on the date the Board of Directors approves the regulations for the 2026 Share Buyback Program. This shifts the company’s authorized repurchases into the new 2026 framework once the Board finalizes those rules.

Is Grupo Cibest obliged to execute the 2026 share buyback program fully?

Grupo Cibest is not obliged to execute the 2026 Buyback Program in whole or in part. The shareholders’ decision allows management to suspend or limit repurchases if internal or market conditions are considered inappropriate for carrying out the program.

Who will define the terms and execution of Grupo Cibest’s 2026 buyback?

The Board of Directors will issue the 2026 Regulation, defining terms, conditions, and execution mechanisms. Management is empowered to carry out all necessary legal acts, obtain required permits, and implement the program in line with those Board-approved regulations and applicable law.

How will Grupo Cibest ensure equal treatment of shareholders in the buyback?

The company states that buybacks will use mechanisms ensuring equal conditions for all shareholders. The repurchase price for each share class must comply with applicable regulations, and the Board-designed procedures will govern how transactions or orders are executed under the 2026 program.