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 Number 001-42819

SAYONA MINING LIMITED

(Translation of registrant’s name into English)

Level 28,

10 Eagle Street

Brisbane, Queensland 4000

Australia

(Address of principal executive office)

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

Form 20-F   x                  Form 40-F   ¨

Sayona Mining Limited (the “Registrant”) is filing the following exhibits on this Report on Form 6-K, each of which is hereby incorporated by reference:

Exhibit

No.	Description
99.1	Appendix 3G – Notification of issue, conversion or payment up of unquoted equity securities, as filed by the Registrant with the Australian Securities Exchange on September 4, 2025.
99.2	Notice under section 708(5)(e) of the Corporations Act 2001 (Cth), as filed by the Registrant with the Australian Securities Exchange on September 5, 2025.

SIGNATURE

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.

	SAYONA MINING LIMITED
Date: September 5, 2025	By:	/s/ Dylan Roberts
		Name: Dylan Roberts
		Title: Company Secretary and General Counsel