Banco Santander (SAN) discloses $12.4B in Form 13F holdings

Rhea-AI Filing Summary

Banco Santander, S.A. filed a Form 13F reporting institutional holdings with a Form 13F Information Table value total of $12,401,105,429 and 901 reported entries. The report lists 5 other included managers and is signed by Ruben Navajo on 05-06-2026.

Key Figures

Information Table Value Total: $12,401,105,429 Form 13F Information Table Entry Total: 901 entries Number of Other Included Managers: 5 +2 more

5 metrics

Information Table Value Total $12,401,105,429 Form 13F summary page

Form 13F Information Table Entry Total 901 entries Form 13F summary page

Number of Other Included Managers 5 Form 13F summary page list

Form 13F File Number 028-04177 Cover page

Signing Date 05-06-2026 Signature block

Key Terms

Form 13F, Form 13F Information Table, Institutional Investment Manager

3 terms

Form 13F regulatory

"Form 13F HOLDINGS REPORT. (Check here if all holdings are reported)"

A Form 13F is a quarterly filing that large investment managers must submit to disclose their holdings in publicly traded stocks and certain other securities. It acts like a peek into the portfolios of big investors, helping other market participants see what large players are buying or selling and offering clues about investment trends, crowded trades, and potential market impact.

Form 13F Information Table financial

"Form 13F Information Table Entry Total: 901"

Institutional Investment Manager regulatory

"Institutional Investment Manager Filing this Report Name: Banco Santander, S.A."

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F COVER PAGE

OMB APPROVAL

OMB Number:			3235-0006
Estimated average burden
hours per response:			23.8

Report for the Calendar Year or Quarter Ended: 03-31-2026

Check here if Amendment		Amendment Number:
This Amendment (Check only one.):		is a restatement.
		adds new holdings entries.

Institutional Investment Manager Filing this Report:
Name:	Banco Santander, S.A.
Address:	Ciudad Grupo Santander
	Boadilla del Monte
	Madrid, U3 28660
Form 13F File Number:	028-04177
CRD Number (if applicable):
SEC File Number (if applicable):	001-12518

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:
Name:		Ruben Navajo
Title:		Head of Group Accounting
Phone:		034-615900262
Signature, Place, and Date of Signing:
/s/ Ruben Navajo			Madrid, U3	05-06-2026
[Signature]			[City, State]	[Date]

Report Type (Check only one.):
X	13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.)
	13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).)
	13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)

Form 13F Summary Page
	Report Summary:
	Number of Other Included Managers:		5
	Form 13F Information Table Entry Total:		901
	Form 13F Information Table Value Total:		12,401,105,429
			(round to nearest dollar)

List of Other Included Managers:
Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.
[If there are no entries in this list, state "NONE" and omit the column headings and list entries.]
	No.	Name	Form 13F File No.	CRD No. (if applicable)	SEC File No. (if applicable)	CIK
	1	Banco Santander International SA	028-17923			0001697263
	2	Banco Santander International	028-17917			0001697453
	3	SAM Investment Holdings, S.L.	028-18759			0001739361
	4	Grupo Empresarial Santander, S.L.	028-20720			0001844952
	5	Banco Santander Mexico S.A., Institucion de Banca Multiple, Grupo Financiero Santander Mexico	028-17978			0001698287

FAQ

What does Banco Santander's (SAN) Form 13F report show?

The Form 13F reports holdings valued at $12,401,105,429. It lists 901 information table entries and identifies 5 other included managers, with the filing signed on 05-06-2026 by Ruben Navajo.

How many holdings did Banco Santander report in the 13F (SAN)?

Banco Santander reported 901 entries in its Form 13F information table. The filing aggregates those entries into a total value of $12,401,105,429 as shown on the summary page.

Who signed Banco Santander's Form 13F and when?

The report is signed by Ruben Navajo, Head of Group Accounting, on 05-06-2026. The signature block appears on the form cover page accompanying the 13F summary.

Does the 13F filing list other managers related to Banco Santander (SAN)?

Yes; the filing lists 5 other included managers by name, including Banco Santander International SA and Banco Santander Mexico S.A., with their respective Form 13F file numbers shown on the summary.

What is the Form 13F file number for Banco Santander's filing?

The Form 13F File Number shown on the cover is 028-04177. That identifier appears on the filing cover alongside the manager name and address.