6-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUERPURSUANT TO RULE 13a-16 OR 15d-16 OF THESECURITIES EXCHANGE ACT OF 1934

For the month August 2021

(Commission File No. 001-35193)

Grifols, S.A.

(Translation of registrant’s name into English)

Avinguda de la Generalitat, 152-158

Parc de Negocis Can Sant Joan

Sant Cugat del Valles 08174

Barcelona, Spain

(Address of registrant’s principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F x  Form 40-F ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (1):

Yes ¨  No x

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (7):

Yes ¨  No x

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ¨  No x

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-         .                       .

Grifols, S.A.

TABLE OF CONTENTS

Pursuant to the provisions of article 227 of the Consolidated Text of the Securities Market Act, approved by the Legislative Royal Decree 4/2015, of 23 October, Grifols, S.A. ("Grifols") hereby informs about the following

OTHER RELEVANT INFORMATION

In connection with the Other Relevant Information notice number 11105 of 30 July 2021, Grifols announces that it has also received from (i) the required majority of lenders under the Credit Agreement as well as from (ii) the European Investment Bank (EIB) the consent to incorporate the proposed amendments in the corresponding debt documents in order to allow, among other things and subject to the conditions set forth therein, an internal corporate reorganization and the issuance and sale of Class B common stock in each of Biomat USA, Inc. and Biomat Newco Corp. (both indirect wholly-owned subsidiaries of Grifols) and transactions ancillary thereto (the "Amendments").

As a result of the receipt of the consents described above, Grifols will enter into the corresponding amendment documents to the Credit Agreement executed on 15 November 2019 (Relevant Event number 283695 of 15 November 2019) and to the relevant finance contracts entered into with the EIB (Relevant Events number 230196 of 28 of October 2015, 259188 of 5 December 2017 and 269458 of 7 September 2018) to reflect such Amendments.

In Barcelona, on 16 August 2021

Nuria Martín Barnés

Secretary to the Board of Directors

SIGNATURES

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, thereto duly authorized.

Date:  August 16, 2021