Banco Santander, S.A., ("Santander" or the "Offeror") in accordance with the provisions of the securities market legislation, communicates the following:

OTHER RELEVANT INFORMATION

Further to the communication made on 23 September 2024 (registered under number 2389) regarding the invitation by Santander to holders of its outstanding €1,500,000,000 1.375 per cent. Senior Non-Preferred Instruments due January 2026 (ISIN: XS2168647357) (the "EUR SNP Notes") and €1,750,000,000 3.750 per cent. Fixed Rate Senior Preferred Instruments due January 2026 (ISIN: XS2575952424) (the "EUR SP Notes" and, together with the EUR SNP Notes, the "Notes" and each a "Series") to tender any and all of such Notes for purchase by the Offeror for cash, in accordance with the terms of the tender offer memorandum dated 23 September 2024 (the "Tender Offer Memorandum") (the "Offers"), the Offeror now announces the results of the Offers.

Capitalised terms used but not otherwise defined in this announcement shall have the meaning given to them in the Tender Offer Memorandum.

The Expiration Time for the Offers was 5.00 p.m. (CET) on 27 September 2024.

The Offeror hereby announces that it will accept for purchase in accordance with the terms and subject to the conditions set out in the Tender Offer Memorandum and at the relevant Purchase Price: (i) €502,700,000 in aggregate principal amount of the EUR SNP Notes ; and (ii) €713,700,000 in aggregate principal amount of the EUR SP Notes, as set out in the table below.

Notes purchased by the Offeror pursuant to the Offer will be cancelled by the Offeror and will not be re-issued or re-sold. Notes which have not been validly submitted or validly submitted but not accepted for purchase pursuant to the Offer will remain outstanding. Following the Settlement Date, there will be an outstanding nominal amount of (i) €997,300,000 of EUR SNP Notes and (ii) €1,036,300,000 of EUR SP Notes.

Payment of the relevant Tender Consideration in respect of the Notes accepted for purchase by the Offeror will occur on the Settlement Date, which is expected to be 2 October 2024.

Any requests for information in relation to the Offers should be directed to the Dealer Managers or the Tender Agent whose contact details are listed below.

Boadilla del Monte (Madrid), 30 September 2024

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN OR INTO OR TO ANY PERSON LOCATED OR RESIDENT IN ANY JURISDICTION WHERE OR TO WHOM IT IS UNLAWFUL TO RELEASE, PUBLISH OR DISTRIBUTE THIS ANNOUNCEMENT.

DISCLAIMER

This announcement must be read in conjunction with the Tender Offer Memorandum. This announcement and the Tender Offer Memorandum contain important information which should be read carefully before any decision is made with respect to the Offer. If any Qualifying Holder is in any doubt as to the contents of this announcement, the Tender Offer Memorandum or the action it should take, it is recommended to seek its own financial, legal, regulatory and tax advice, including in respect of any tax consequences, immediately from its broker, bank manager, solicitor, accountant or other independent financial, tax or legal adviser.

The distribution of this announcement and the Tender Offer Memorandum in certain jurisdictions may be restricted by law. Persons into whose possession this announcement and/or the Tender Offer Memorandum comes are required by each of the Offeror, the Sole Dealer Manager and the Tender Agent to inform themselves about, and to observe, any such restrictions.