Company: BBVXF
Filing Date: 2025-08-29
Form Type: 425
Source: 0001193125-25-192644
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Company: BANCO BILBAO VIZCAYA ARGENTARIA, S.A.
Filing Date: 2025-08-29
Form: 425
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Filed by Banco Bilbao Vizcaya Argentaria, S.A.

Pursuant to Rule 425 under the Securities Act of 1933

Subject Company: Banco de Sabadell, S.A.

Commission File No.: 333-281111

Banco Bilbao Vizcaya Argentaria, S.A. (“BBVA”), in compliance with the Securities Market
legislation, hereby communicates the following:

OTHER RELEVANT INFORMATION

In relation to the voluntary tender offer launched by BBVA for the entire share capital of Banco de Sabadell, S.A. (“Banco Sabadell”) (the
“Offer”), for which the prior announcement was published as inside information on May 9, 2024 and the request for authorisation was submitted to the Spanish Securities Market Commission (CNMV) on May 24, 2024, and
accepted for processing on June 11, 2024, it is hereby stated that in accordance with the prior announcement of the Offer and as a consequence of the interim dividend against the 2025 financial year results in the gross amount of €0.07 per
share paid by Banco Sabadell to its shareholders today, the consideration for the Offer must be adjusted with the ex dividend date (August 27, 2025).

Therefore, after applying the adjustment in the terms set forth in the prior announcement, the consideration offered by BBVA to the shareholders of Banco
Sabadell under the Offer is adjusted to one (1) newly issued ordinary share of BBVA and €0.70 in cash for every five point five four eight three (5.5483) ordinary shares of Banco Sabadell.

This adjustment, as outlined in the prior announcement of May 9, 2024, is intended to maintain the economic terms of the Offer equivalent, following the
dividend payments made by Banco Sabadell.

Madrid, August 29, 2025

IMPORTANT INFORMATION FOR INVESTORS

In connection with the proposed transaction, Banco Bilbao Vizcaya Argentaria, S.A. has filed with the U.S. Securities and Exchange Commission (the
“SEC”) a Registration Statement on Form F-4 that includes an offer to exchange/prospectus. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT, OFFER TO
EXCHANGE/PROSPECTUS AND ALL OTHER RELEVANT DOCUMENTS THAT HAVE BEEN OR WILL BE FILED WITH THE SEC REGARDING THE