UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO SECTION 13A-16 OR 15D-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of May 2022

Commission File Number: 001-41072

Iris Energy Limited

(Translation of registrant’s name into English)

Level 12, 44 Market Street

Sydney, NSW 2000 Australia

+61 2 7906 8301

(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 ☒ Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐

Iris Energy Announces CFO Appointment

On May 16, 2022, Iris Energy Limited (the “Company”) issued a press release, a copy of which is furnished as Exhibit 99.1 to this Report on Form 6-K, announcing the appointment of Belinda Nucifora as Chief Financial Officer, effective immediately.

This Report on Form 6-K and Exhibit 99.1 to this Report on Form 6-K shall be deemed to be incorporated by reference into the registration statement on Form S-8 (File No. 333-261320) of Iris Energy Limited and to be a part thereof from the date on which this report is filed, to the extent not superseded by documents or reports subsequently filed or furnished.

2

EXHIBIT INDEX

Exhibit No.	Description
99.1	Press Release of Iris Energy Limited, dated May 16, 2022

3

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	Iris Energy Limited
Date: May 16, 2022	By:	/s/ Daniel Roberts
		Daniel Roberts
		Co-Chief Executive Officer and Director

4