Company: GIFLF
Filing Date: 2025-04-02
Form Type: 6-K
Source: 0001104659-25-031282
Chunk: 0

Company: Grifols SA
Filing Date: 2025-04-02
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 April 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>

<div align='center'>2</div>

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

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

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

With respect to information published in certain media outlet regarding discussions having restarted with respect
to a potential new offer for Grifols’ shares from Brookfield Capital Partners (UK) Limited, the Company informs that its Board of
Directors has no knowledge regarding this information.

In Barcelona, 2 April 2025

| Nuria Martín Barnés                 |
| Secretary of the Board of Directors |

<div align='center'>3

SIGNATURES</div>

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.

| Grifols, S.A. |                   |                      |
| By:           | /