UNITED STATES SECURITIES AND EXCHANGE
COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

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

UNDER THE SECURITIESEXCHANGE ACT OF 1934

For the month of January, 2026

Commission file number: 1-10110

BANCO BILBAO VIZCAYA ARGENTARIA, S.A.

(Exact name of Registrant as specified in itscharter)

BANK BILBAO VIZCAYA ARGENTARIA, S.A.

(Translation of Registrant’s name intoEnglish)

Calle Azul 4,

28050 Madrid

Spain

(Address of principal executive offices)

Indicate by check mark whether the registrant filesor will file annual reports under cover of Form 20-F or Form 40-F:

Indicate by check mark if the registrant is submittingthe Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Indicate by check mark if the registrant is submittingthe Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Banco Bilbao Vizcaya Argentaria, S.A. (“BBVA”),in compliance with the securities market legislation, hereby communicates the following:

OTHER RELEVANT INFORMATION

Furtherto the notice of inside information of 19 December 2025, with registration number 3046, relating to the execution of the first trancheof a buyback program of own shares of BBVA (the “First Tranche”), and pursuant to article 5 of Regulation (EU) no.596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse, BBVA informs–on the basis of the informationreceived from J.P. Morgan SE as the First Tranche manager– that it has carried out the following transactions over BBVA shares inexecution of the First Tranche between 2 January and 9 January 2026 (both inclusive):

The cashamount of the shares purchased to date as a result of the execution of the First Tranche amounts to 292,356,301.58 Euros, which, approximately,represents 19.49% of the maximum cash amount of the First Tranche.

Issuer name: Banco Bilbao Vizcaya Argentaria,S.A. - LEI K8MS7FD7N5Z2WQ51AZ71

ISIN Code of the ordinary shares ofBBVA: ES0113211835

Madrid, 12 January 2026

SIGNATURE

Pursuantto the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by theundersigned, thereunto duly authorized.