Company: BBVXF
Filing Date: 2025-09-05
Form Type: 6-K
Source: 0001193125-25-196627
Chunk: 0

Company: BANCO BILBAO VIZCAYA ARGENTARIA, S.A.
Filing Date: 2025-09-05
Form: 6-K
Chunk 0
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### UNITED STATES SECURITIES AND EXCHANGE

### COMMISSION
WASHINGTON, D.C. 20549

FORM 6-K

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

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of September, 2025

Commission file number: 1-10110

BANCO BILBAO VIZCAYA ARGENTARIA, S.A.

(Exact name of Registrant as specified in its charter)

BANK BILBAO VIZCAYA ARGENTARIA, S.A.

(Translation of Registrant’s name into English)

Calle Azul 4,

28050 Madrid

Spain

(Address of principal executive offices)

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 X 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):

Yes No X

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):

Yes No X

Banco Bilbao Vizcaya Argentaria, S.A.
(“BBVA”), pursuant to the provisions of the Spanish Securities Market Act, hereby proceeds by means of the present document to notify the following:

### OTHER RELEVANT INFORMATION
A
presentation for analysts is convened in relation to the public tender offer for shares of Banco Sabadell, S.A., approved by the CNMV, which will take place today at 12.00 noon (Madrid time).

The presentation can be followed via BBVA’s website on the Internet (www.bbva.com).

A recording of the presentation will also be available on the above website, for a period of, at least, one month.

Madrid, September 5, 2025

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 5, 2025 |     | Banco Bilbao Vizcaya Argentaria, S.A. 
 By: /s/ Victoria del Castillo         
 Marchese                              |
|