Company: BBVXF
Filing Date: 2025-10-07
Form Type: 6-K
Source: 0001193125-25-232944
Chunk: 0

Company: BANCO BILBAO VIZCAYA ARGENTARIA, S.A.
Filing Date: 2025-10-07
Form: 6-K
Chunk 0
---
### 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 October, 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), in compliance with the Securities Market legislation, hereby communicates the following: OTHER RELEVANT INFORMATION Today October 7th, 2025, Fitch Ratings(Fitch) has upgraded by one notch BBVA ’ s long-term senior preferred debt rating to A from A-. The outlook changed to stable from Rating Watch Positive. Fitch has also taken the following actions over other BBVA’s ratings:

| ● |     | Upgraded by one notch long-term issuer default rating to A- from BBB+ and 
 outlook changed to stable from Rating Watch Positive.                     |

| ● |     | Upgraded by one notch short-term issuer default rating to F1 from F2 and outlook changed to stable from Rating Watch 
 Positive.                                                                                                            |

| ● |     | Upgraded by one notch Derivative Counterparty Rating to A(dcr) from A-(dcr) and 
 outlook changed to stable from Rating Watch Positive.                           |

| ● |     | Upgraded by one notch long-term deposits rating to A from A- and outlook changed 
 to stable from Rating Watch Positive.