Company: GIFLF
Filing Date: 2025-09-29
Form Type: 6-K
Source: 0001104659-25-094131
Chunk: 0

Company: Grifols SA
Filing Date: 2025-09-29
Form: 6-K
Chunk 0
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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 September 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-FxForm 40-F ¨

Grifols, S.A.

TABLE OF CONTENTS</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>

The Board of Directors of Grifols, in its meeting
held on 25 and 26 September 2025 resolved, among other resolutions:

| - | To create a Strategy Committee with an advisory role and with the main purpose of assisting the Board                                         
 of Directors and making proposals to it on strategic initiatives and developments, with the specific authorities set forth in the Regulations 
 of the Internal Functioning of the Board of Directors of Grifols and in the Strategy Committee's own Regulations.                             |

The composition of the Strategy Committee
will be the following:

| Director                          |     | Position             |     | Category       |
| Mrs. Anne-Catherine Berner        |     | Chairperson          |     | Independent    |
| Mr. Íñigo Sánchez-Asiaín M