Company: BBVXF
Filing Date: 2025-09-22
Form Type: 6-K
Source: 0001193125-25-209952
Chunk: 1

Company: BANCO BILBAO VIZCAYA ARGENTARIA, S.A.
Filing Date: 2025-09-22
Form: 6-K
Chunk 1
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 of
the Offer, pursuant to the provisions of Article 31.1 of Royal Decree 1066/2007 and the extension, under Article 23.2 of Royal Decree 1066/2007, of the acceptance period following its resumption once the amendment of the Offer has been authorized by
the CNMV.

Today, September 22, 2025, BBVA will submit the request for authorization of the amendment to the Offer, together with the Offer
prospectus supplement, an independent expert report attesting the improvement of the consideration and other required documentation, as provided in Article 31, sections 1, 3 and 4 of of Royal Decree 1066/2007.

Madrid, September 22, 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 22, 2025 |     | Banco Bilbao Vizcaya Argentaria, S.A.  |
|:-------------------------|:----|:---------------------------------------|
|                          |     | By: /s/ Victoria del Castillo Marchese |
|                          |     | Name: Victoria del Castillo Marchese   |
|                          |     | Title: Global Head of Strategy & M&A   |