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                             September 23, 2021

       Jason Conroy
       Chief Executive Officer
       Iris Energy Pty Ltd
       Level 21, 60 Margaret Street
       Sydney, NSW 2000 Australia

                                                        Re: Iris Energy Pty Ltd
                                                            Draft Registration
Statement on Form F-1
                                                            Submitted August
26, 2021
                                                            CIK No. 0001878848

       Dear Mr. Conroy:

              We have reviewed your draft registration statement and have the
following comments. In
       some of our comments, we may ask you to provide us with information so
we may better
       understand your disclosure.

              Please respond to this letter by providing the requested
information and either submitting
       an amended draft registration statement or publicly filing your
registration statement on
       EDGAR. If you do not believe our comments apply to your facts and
circumstances or do not
       believe an amendment is appropriate, please tell us why in your
response.

             After reviewing the information you provide in response to these
comments and your
       amended draft registration statement or filed registration statement, we
may have additional
       comments.

       Draft Registration Statement on Form F-1

       Cover Page

   1.                                                   Please tell us why you
include references to the designated market maker here and on
                                                        page 102 when it
appears that you intend to list on the Nasdaq. Also, tell us why you refer
                                                        to multiple financial
advisors when it appears that B. Riley Securities, Inc. is the only
                                                        financial advisor for
this offering.
 Jason Conroy
FirstName
Iris EnergyLastNameJason   Conroy
           Pty Ltd
Comapany 23,
September  NameIris
               2021 Energy Pty Ltd
September
Page  2    23, 2021 Page 2
FirstName LastName
Prospectus Summary
Our Company, page 1

2.       Please disclose the company's revenues and net loss for the periods
presented.
Summary Historical Financial Information, page 8

3.       Please revise to include pro forma earnings per share information that
reflects the
         conversion of the convertible notes into ordinary shares upon the IPO,
along with the
         related impact to interest expense. Also, to the extent the IPO will
satisfy the share price
         thresholds for any tranche in the incentive arrangement with Daniel
and William Roberts
         such that compensation expense will be recorded and ordinary shares
issued upon
         effectiveness of the offering, revise to include adjustments to the
numerator and
         denominator of your pro forma per share calculations for the
additional shares and related
         share-based compensation expense. Further, include comparable pro
forma statements of
         financial position information.
Risk Factors
Any critical failure of key electrical or data equipment..., page 12

4.       Please provide examples of the types of equipment that represent
single points of failure
         and that have long lead times from the time an order is placed until
installation and
         commissioning.
We may be unable to raise additional capital..., page 14

5.       We note your disclosure of your binding commitment to purchase mining
hardware.
         Please disclose the material terms of such agreement(s), including the
term, termination
         provisions and any minimum purchase requirements.
Our reliance on third-party mining pool service providers..., page 26

6.       We note your disclosure of your reliance on third-party mining pool
service providers.
         Please disclose the material terms of any service agreement with such
providers, including
         the term and termination provisions.
The registration and listing of our Ordinary shares..., page 40

7.       Please replace the first two sentences of this risk factor with the
sentence: "Prior to the
         opening of trading on the Nasdaq Stock Market LLC, there will be no
book building
         process and no price at which underwriters initially sell shares to
the public..." in order to
         properly focus the risk on the underwriting activities that will not
be present.
 Jason Conroy
FirstName
Iris EnergyLastNameJason   Conroy
           Pty Ltd
Comapany 23,
September  NameIris
               2021 Energy Pty Ltd
September
Page  3    23, 2021 Page 3
FirstName LastName
Capitalization, page 58

8.       Please revise to include pro forma information here in columnar format
reflecting the
         impact of the conversion of the convertible debt upon the IPO, the
impact of the incentive
         arrangement with Daniel and William Robert, if any, as well as the two
classes of shares
         to be outstanding following the offering.
Management's Discussion and Analysis of Financial Condition and Results of
Operations
Comparison of Our Results of Operations for the Half Year ended December 31,
2020 and
December 31, 2019, page 61

9.       You state on page 63 that the increase in mining revenue was primarily
attributable to
         higher Bitcoin prices and the greater number of Bitcoin produced and
sold in the half year
         ended December 31, 2020. Please revise to quantify the number of
Bitcoin produced and
         sold for each period as well as the amount of the increase in revenue
attributable to the
         higher Bitcoin prices. Refer to Section III.D of SEC Release No.
33-6835.
Liquidity and Capital Resources, page 65

10.      Please revise to state whether, as of the most recent balance sheet
date, your existing cash
         will be sufficient to meet capital expenditure needs for the next 12
months. To the extent
         it will not, disclose how long you will be able to continue to fund
your operations using
         current available cash resources. We refer you to FRC 501.03(a) and
Section IV of SEC
         Release 33-8350.
Management
Remuneration, page 81

11.      Please file the Employee Share Plan, Employee Option Plan and the
employment
         agreements with your executive officers as exhibits to your
registration statement or
         advise. Refer to Item 601(b)(10)(iii)(A) of Regulation S-K.
Certain Relationships and Related Party Transactions, page 87

12.      Please disclose the material terms of the related party loans
described on page F-30. Also,
         identify the entity affiliated with Mr. Gozowski that purchased your
ordinary shares in a
         private placement. Refer to Item 7.B of Form 20-F.
 Jason Conroy
FirstName
Iris EnergyLastNameJason   Conroy
           Pty Ltd
Comapany 23,
September  NameIris
               2021 Energy Pty Ltd
September
Page  4    23, 2021 Page 4
FirstName LastName
Principal and Registered Stockholders, page 88

13.      Please disclose the portion of each class of securities held in the
United States and the
         number of record holders in the United States. Refer to Item 7.A.2 of
Form 20-F.
Description of Share Capital and Constitution
Key Provisions in Our Constitution, page 89

14.      Please describe the circumstances under which holders of your ordinary
shares will be
         entitled to vote separately as a single class.
Plan of Distribution, page 112

15.      Please disclose which specific Nasdaq rule provision requires Nasdaq
to consult with B.
         Riley Securities, Inc. when conducting its price validation checks and
clarify the type of
         guidance Nasdaq may seek from B. Riley Securities, Inc. when
conducting its price
         validation checks on the day of listing.
Notes to the consolidated financial statements
Note 2. Significant accounting policies
Revenue Recognition, page F-10

16.      You disclose that in certain pools the amount of reward for computing
power depends on
         the pool   s success in mining blocks. Please revise to clarify
whether revenue earned from
         these pools consists of block rewards and transaction fees and how the
amount of revenue
         earned is determined. Further, you disclose that in other pools, the
group is not directly
         exposed to the pool   s success in mining blocks. For these other
pools, revise to explain
         how revenue is generated, how it is determined and how that differs
from pools in which
         rewards are based on the pool   s success.
Notes to the unaudited interim consolidated financial statements
Note 14. Events after the reporting period, page F-45

17.      Please disclose the date when the financial statements were authorized
for issue and who
         gave that authorization. Refer to IAS 10.17.
18.      You disclose an incentive arrangement with Daniel Roberts and William
Roberts under
         which the number of options will convert into ordinary shares upon
achieving certain
         share price thresholds. Please revise to include the estimated
share-based compensation
         expense to be recorded upon completion of the IPO if the various
thresholds are met.
         Refer to IAS 10.21(b).
19.      Please provide us with a breakdown of all share-based compensation
awards granted since
         January 1, 2021. Provide the fair value of the underlying shares used
to value each award.
         To the extent there was any significant fluctuations in the fair
values, describe for us the
         factors that contributed to such fluctuations, including any
intervening events within the
 Jason Conroy
Iris Energy Pty Ltd
September 23, 2021
Page 5
      company or changes in your valuation assumptions or methodology. Please
continue to
      update this analysis through effectiveness of the registration statement.
Also, disclose any
      share-based issuances subsequent to the most recent balance sheet date
and the expected
      financial statement impact in your subsequent event footnote, if
material.
General

20.   Please supplementally provide us with copies of all written
communications, as defined in
      Rule 405 under the Securities Act, that you, or anyone authorized to do
so on your behalf,
      present to potential investors in reliance on Section 5(d) of the
Securities Act, whether or
      not they retain copies of the communications.
       You may contact Melissa Kindelan, Senior Staff Accountant, at (202)
551-3564 or
Kathleen Collins, Accounting Branch Chief, at (202) 551-3499 if you have
questions regarding
comments on the financial statements and related matters. Please contact
Priscilla Dao, Staff
Attorney, at (202) 551-5997 or Jeff Kauten, Staff Attorney, at (202) 551-3447
with any other
questions.



                                                            Sincerely,
FirstName LastNameJason Conroy
                                                            Division of
Corporation Finance
Comapany NameIris Energy Pty Ltd
                                                            Office of
Technology
September 23, 2021 Page 5
cc:       Drew Capurro
FirstName LastName