Banco Santander (NYSE: SAN) closes purchase of UK lender TSB Banking Group

Rhea-AI Filing Summary

Banco Santander, S.A. reports that its previously announced acquisition of TSB Banking Group plc has been completed. The transaction closed on 30 April 2026 (London time) on the terms that were announced in earlier inside information notices from July 2025.

The company also clarifies that this communication is classified as "Other Relevant Information" under securities market rules and explicitly states that it does not constitute an offer to sell or a solicitation of an offer to purchase securities.

Insights

Banking sector M&A analyst

Banco Santander confirms closing of its TSB Banking Group acquisition.

Banco Santander discloses that its acquisition of TSB Banking Group plc, first flagged as inside information in July 2025, was completed on 30 April 2026 on previously announced terms. This moves the deal from announced to closed status.

The notice is brief and does not include valuation, consideration, or integration details, so investors only learn that legal completion has occurred. It is presented as "Other Relevant Information" and explicitly states it is not an offer or solicitation to buy or sell securities.

The key follow-up areas, which are not covered here, would typically relate to how the acquired business will be integrated and its financial contribution, which may be discussed in future periodic reports or strategic updates.

Key Figures

Acquisition completion date: 30 April 2026 Initial disclosure date: 1 July 2025

2 metrics

Acquisition completion date 30 April 2026 Completion of TSB Banking Group acquisition (London time)

Initial disclosure date 1 July 2025 Inside information notices on TSB acquisition terms

Key Terms

Other Relevant Information, inside information, Acquisition, Does Not Constitute an Offer of Securities, +1 more

5 terms

Other Relevant Information regulatory

"hereby announces the following OTHER RELEVANT INFORMATION Reference"

inside information regulatory

"notices of inside information dated 1 July 2025"

Information not available to the public that, if known, would likely cause a company’s stock or bonds to rise or fall—for example, undisclosed earnings, deals, product results, or management plans. It matters because trading on that information gives an unfair advantage, can distort market prices, and is typically illegal or subject to strict rules, so investors watch for proper disclosure and compliance to protect fair, transparent markets.

Acquisition financial

"concerning the acquisition of TSB Banking Group, plc (the “Acquisition”)"

An acquisition is when one company buys control of another by purchasing its shares or assets and brings that business into its own operations. For investors, acquisitions matter because they can reshape a company’s future cash flow, growth and risk profile—like a homeowner adding an extension to increase space and value; a well-priced, well-integrated deal can boost returns, while an expensive or poorly merged one can hurt earnings and raise debt.

Does Not Constitute an Offer of Securities regulatory

"IMPORTANT INFORMATION Does Not Constitute an Offer of Securities"

Report of Foreign Issuer regulatory

"Report of Foreign Issuer Pursuant to Rule 13a-16 or 15d-16"

Form 6-K: How Foreign Companies Report to the SEC →

FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of May, 2026

Commission File Number: 001-12518

Banco Santander, S.A.

(Exact name of registrant as specified in its charter)

Ciudad Grupo Santander

28660 Boadilla del Monte (Madrid) Spain 

(Address of principal executive office)

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 X Form 40-F

Banco Santander, S.A.

TABLE OF CONTENTS

Item
1	Report of Other Relevant Information dated May 1, 2026

Item 1

 

Banco Santander, S.A. (“Banco Santander” or the “Bank”), in compliance with the Securities Market legislation, hereby announces the following:

OTHER RELEVANT INFORMATION

Reference is made to our notices of inside information dated 1 July 2025 (official registry numbers 2807 and 2808) concerning the acquisition of TSB Banking Group, plc (the “Acquisition”). The Bank hereby informs that the Acquisition was completed on 30 April 2026 (London time) on the terms previously announced.

Boadilla del Monte (Madrid), 1 May 2026

IMPORTANT INFORMATION

Does Not Constitute an Offer of Securities

Neither this document nor the information contained herein constitutes an offer to sell or a solicitation of an offer to purchase securities.

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.

		Banco Santander, S.A.
Date:	May 1, 2026	By:	/s/ Pedro de Mingo Kaminouchi
			Name:	Pedro de Mingo Kaminouchi
			Title:	Head of Corporate Compliance

FAQ

What did Banco Santander (SAN) announce regarding TSB Banking Group?

Banco Santander announced that its acquisition of TSB Banking Group plc has been completed. The deal closed on April 30, 2026, London time, on the terms previously announced in inside information notices released in July 2025.

When was Banco Santander’s acquisition of TSB Banking Group completed?

The acquisition of TSB Banking Group plc by Banco Santander was completed on April 30, 2026, based on London time. This update confirms that the transaction has moved from an announced agreement to full closing on the prior disclosed terms.

How had Banco Santander previously disclosed the TSB acquisition?

Banco Santander had previously disclosed the TSB Banking Group acquisition as inside information on July 1, 2025, under official registry numbers 2807 and 2808. The new notice simply confirms completion of the transaction on the same, already announced terms.

Does Banco Santander’s May 2026 communication constitute an offer of securities?

No, Banco Santander explicitly states that neither the document nor the information it contains constitutes an offer to sell, or a solicitation of an offer to purchase, securities. It is presented as regulatory information about completing the TSB acquisition.

What type of information does Banco Santander classify this TSB update as?

Banco Santander classifies this update as "Other Relevant Information" under securities market legislation. It focuses on confirming that the TSB Banking Group acquisition closed on April 30, 2026, following the terms detailed in earlier inside information notices.