6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report Of ForeignPrivate Issuer

Pursuant To Rule13a-16 Or 15d-16 Of

TheSecurities Exchange Act Of 1934

For the month of August 2021

Commission FileNumber: 000-54290

Grupo Aval Acciones y Valores S.A.

(Exact name ofregistrant as specified in its charter)

Carrera 13 No.26A - 47

BogotáD.C., Colombia

(Address of principalexecutive 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):

GRUPO AVAL ACCIONESY VALORES S.A.

TABLE OF CONTENTS

RELEVANT INFORMATION

Bogotá,August 9, 2021. Grupo Aval Acciones y Valores S.A. (“Grupo Aval”) informs that, following the periodic rating review, Moody's Investor Services affirmed the Ba2 credit rating of Grupo Aval and Grupo Aval Limited and upgraded the rating outlook from negative to stable.

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: August 9, 2021