Company: BBVXF
Filing Date: 2025-09-25
Form Type: 6-K
Source: 0001193125-25-216702
Chunk: 1

Company: BANCO BILBAO VIZCAYA ARGENTARIA, S.A.
Filing Date: 2025-09-25
Form: 6-K
Chunk 1
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For these purposes, on September 5, 2025, BBVA published on its
website, the corresponding exemption document prepared in accordance with the requirements of Delegated Regulation (EU) 2021/528, which does not constitute a prospectus for the purposes of Regulation (EU) 2017/1129, as announced through a disclosure
of other relevant information of the same date on the CNMV’s website (registration number 36558).

As a result of the amendment to the Offer
through the improvement of the consideration (which consist entirely of newly issued BBVA ordinary shares, at an exchange ratio of one BBVA ordinary share for every 4.8376 Banco Sabadell ordinary shares) announced by means of a communication of
inside information dated September 22, 2025 (registration number 2892) and authorized by the CNMV today, September 25, 2025 (disclosure of other relevant information with registration number 36838), BBVA has also published today on its
website (www.bbva.com) a supplement to the exemption document referred to in the preceding paragraph, which likewise does not constitute a prospectus for the purposes of Regulation (EU) 2017/1129 and which is available at the following link:https://accionistaseinversores.bbva.com/wp-content/uploads/2025/09/Suplemento-al-documento-de-exencion-250925.pdf

The supplement to the exemption document does not require review or approval by any supervisory authority
and, specifically, has not been reviewed, approved or filed with the CNMV.

Madrid, September 25, 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 25, 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   |