Company: GIFLF
Filing Date: 2025-06-05
Form Type: 6-K
Source: 0001104659-25-056816
Chunk: 0

Company: Grifols SA
Filing Date: 2025-06-05
Form: 6-K
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<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of June 2025

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)</div>

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

<div align='center'>Form 20-F x Form 40-F
¨

Grifols, S.A.

TABLE OF CONTENTS</div>

| Grifols,                           
 S.A.                               
 Avinguda de la Generalitat 152-158 
 08174 Sant Cugat del Vallès        
 Barcelona - ESPAÑA                 
 Tel. [34] 935 710 500              
 Fax [34] 935 710 267               
 www.grifols.com                    |

Pursuant to the provisions of article 227 of the Law 6/2023,
of March 17, on Securities Markets and Investment Services, Grifols, S.A. (the "Company") hereby informs about the following

<div align='center'>OTHER RELEVANT INFORMATION</div>

| (i) | The Ordinary General Shareholders' Meeting held on today's date, on second call, has 
 passed the proposals submitted to the shareholders' approval.                        |

Furthermore, it is hereby expressly
noted that item 6.5 (Ratification of the appointment by co-option of Mr. Paul S. Herendeen as a member of the Board of Directors),
has not been submitted to a vote given that the minority shareholders FF Hybrid LP, Flat Footed Series LLC-Fund3, GP Recovery Fund LLC,
Mason Capital Master Fund, L.P., and Sachem Head LP have grouped their shares (a total of 8.4% of the Company's voting rights) and have
designated Mr. Paul S. Herendeen as a director in exercise of their right