6-K

UNITEDSTATES

SECURITIESAND EXCHANGE COMMISSION

Washington,D.C. 20549

FORM6-K

ReportOf Foreign Private Issuer

PursuantTo Rule 13a-16 Or 15d-16 Of

TheSecurities Exchange Act Of 1934

For the month of September 2021

CommissionFile Number: 000-54290

GrupoAval Acciones y Valores S.A.

(Exactname of registrant as specified in its charter)

Carrera13 No. 26A - 47

BogotáD.C., Colombia

(Addressof principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or 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)(7):

GRUPOAVAL ACCIONES Y VALORES S.A.

TABLEOF CONTENTS

Item 1

RELEVANT INFORMATION

Bogotá,September 24, 2021. Grupo Aval Acciones y Valores S.A. (“Grupo Aval”) informs that Moody's Investor Services affirmed the Ba2 credit rating of Grupo Aval and Grupo Aval Limited and changed the rating outlook from stable to negative.

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.

Date: September 24, 2021