1、 SECURITIES AND EXCHANGE COMMISSIONWashington,D.C.20549FORM 20-F(Mark One)REGISTRATION STATEMENT PURSUANT TO SECTION 12(b)OR(g)OF THE SECURITIES EXCHANGE ACT OF 1934ORANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934For the fiscal year ending 31December 2025ORTRANSI
2、TION REPORT PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934Date of event requiring this shell company report Commission file number 001-12518BANCO SANTAND
3、ER,S.A.(Exact name of Registrant as specified in its charter)Kingdom of Spain(Jurisdiction of incorporation)Ciudad Grupo Santander28660 Boadilla del Monte(Madrid),Spain(address of principal executive offices)Jos G.CanteraBanco Santander,S.A.Ciudad Grupo Santander-28660 Boadilla del Monte(Madrid),Spa
4、inTel:+34 91 276 92 90(Name,Telephone,E-mail and/or Facsimile number and Address of Company Contact Person)Securities registered or to be registered,pursuant to Section 12(b)of the ActTitle of each className of each exchange on which registeredAmerican Depositary Shares,each representing the right t
5、o receive one Share of Capital Stock of Banco Santander,S.A.,par value euro 0.50 eachSANNew York Stock ExchangeShares of Capital Stock of Banco Santander,S.A.,par value euro 0.50 eachNot applicableNew York Stock Exchange*Non-cumulative Preferred Stock Series 6SAN PRBNew York Stock Exchange4.250%Seco
6、nd Ranking Senior Debt Securities due 2027SAN27New York Stock Exchange3.800%Senior Non Preferred Fixed Rate Notes due 2028SAN28New York Stock Exchange3.306%Senior Non Preferred Fixed Rate Notes due 2029SAN29New York Stock Exchange4.379%Senior Non Preferred Fixed Rate Notes due 2028SAN28ANew York Sto