Company: BBVXF
Filing Date: 2025-01-14
Form Type: 6-K
Source: 0001193125-25-005943
Chunk: 0

Company: BANCO BILBAO VIZCAYA ARGENTARIA, S.A.
Filing Date: 2025-01-14
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 January, 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 ☒ Form 40-F ☐

BANCO BILBAO VIZCAYA ARGENTARIA, S.A. Explanatory Note This Report on Form 6-Kcontains, as exhibits, certain documents listed below relating to the issuance and sale by Banco Bilbao Vizcaya Argentaria, S.A. (the “ Issuer”) of $1,000,000,000 aggregate liquidation preference of its Series 14 Non-Step-Up Non-CumulativeContingent Convertible Perpetual Preferred Tier 1 Securities (the “ Preferred Securities”). This Report on Form 6-Kand the Exhibits hereto are hereby incorporated by reference into the Registration Statement on Form F-3 (No. 333-266391)filed with the Securities and Exchange Commission and into the related prospectus supplement filed with the Securities and Exchange Commission on January 8, 2025. Exhibit Index

| Exhibit 
 1.1     
 4.18    |     | Description of Exhibit                                                                                                                                                                                          
 Pricing Agreement dated January 7, 2025                                                                                                                                                                         
 Fourth Supplemental Indenture for the Preferred Securities between the Issuer, as Issuer, and The Bank of New York Mellon, acting (except with respect to its role as Contingent Convertible Preferred Security 
 Registrar) through its London Branch, as Trustee, Paying and Conversion Agent, Calculation Agent, Principal Paying Agent and Contingent Preferred Security Registrar dated as of January 14, 2025               |
|: