6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 OF THE

SECURITIES EXCHANGE ACT OF 1934

14 August 2025

Commission File Number: 001-10691

DIAGEO plc

(Translation of registrant’s name into English)

16 Great Marlborough Street, London, United Kingdom, W1F 7HS

(Address of principal executive offices)

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 þ Form 40-F ¨

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, thereunto duly authorized.

Diageo plc

(Registrant)

Date: 14 August 2025

By: /s/ James Edmunds

James Edmunds

Deputy Company Secretary

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