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                              April 8, 2022

       Hugh Gallagher
       Chief Financial Officer
       Marathon Digital Holdings, Inc.
       1180 North Town Center Drive, Suite 100
       Las Vegas, NV 89144

                                                        Re: Marathon Digital 
Holdings, Inc.
                                                            Form 10-K for the 
Fiscal Year Ended December 31, 2021
                                                            File No. 001-36555

       Dear Mr. Gallagher:

              We have limited our review of your filing to the financial 
statements and related
       disclosures 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 these comments within ten business days by 
providing the requested
       information or advise us as soon as possible when you will respond. If 
you do not believe our
       comments apply to your facts and circumstances, please tell us why in 
your response.

                                                        After reviewing your 
response to these comments, we may have additional comments.

       Form 10-K for the Fiscal Year Ended December 31, 2021

       Business, page 5

   1.                                                   Consistent with your 
response in the letter dated July 2, 2019, please clarify your business
                                                        model as to your patent 
licensing business and assets.
   2.                                                   Please ensure that all 
of your disclosures are updated. For example, you state that you
                                                        have no long-term debt, 
but we note the convertible notes payable on your balance sheet
                                                        as of December 31, 
2021. You also state on page 21 that you do not currently own, and
                                                        do not have any current 
plans to seek, any patents in connection with your existing and
                                                        planned blockchain and 
cryptocurrency related operations, but we note from your
                                                        disclosure on page F-14 
that your intangible assets include the Crypto Currency Patent. In
                                                        addition, on page 26, 
you indicate that the current fixed reward on the bitcoin network is
                                                        12.5 bitcoins per 
block, but the reward has decreased by half to become 6.25 bitcoins
                                                        around May 10, 2020.
 Hugh Gallagher
FirstName   LastNameHugh
Marathon Digital  Holdings,Gallagher
                           Inc.
Comapany
April       NameMarathon Digital Holdings, Inc.
       8, 2022
April 28, 2022 Page 2
Page
FirstName LastName
Management's Discussion and Analysis of Financial Condition and Results of 
Operations
Non-GAAP Financial Measures, page 42

3.       We believe that adjusting for impairment of mined cryptocurrency does 
not provide useful
         information to investors in light of your strategy to hold bitcoin as 
a long term investment
         and sell bitcoin in future periods as needed to generate cash for 
treasury management and
         other general corporate purposes, in addition to the recurring nature 
of this charge. Please
         revise to remove this adjustment from your computation of non-GAAP 
measures. Refer
         to Rule 100 of Regulation G.
4.       Please tell us the nature of the non-GAAP adjustment for server 
maintenance contract
         amortization. Explain why you believe that adjusting for this item is 
useful information to
         investors as it appears to represent a normal, recurring, operating 
expense. Refer to Item
         10(e)(1)(i)(C) of Regulation S-K and Question 100.01 of the Compliance 
and Disclosure
         Interpretations on Non-GAAP Financial Measures.
5.       Please tell us what consideration you gave to providing for the income 
tax effects related
         to the adjustments to arrive at non-GAAP net income and non-GAAP 
diluted earnings per
         share. Refer to Question 102.11 of the Compliance and Disclosure 
Interpretations
         on Non-GAAP Financial Measures.
Results of Operations for the Years Ended December 31, 2021, December 31, 2020 
and
December 31, 2019, page 45

6.       Please revise to describe and quantify the significant factors 
affecting the changes in cost
         of revenues in each of the periods presented. Refer to Item 303(b) of 
Regulation S-K.
Liquidity and Capital Resources, page 47

7.       Please revise to provide quantitative and qualitative analysis of the 
underlying reasons for
         the material changes in operating, investing, and financing cash 
flows. Your discussion
         should focus on the primary drivers and other material factors 
necessary to understand
         your cash flows in addition to the indicative value of your historical 
cash flows. Refer to
         Item 303(b) of Regulation S-K and Section IV.B.1 of SEC Release No. 
33-8350.
Notes to Consolidated Financial Statements
Note 1 - Organization and Description of Business
Organization, page F-8

8.       Please provide us with your detailed accounting analysis of whether 
the series of
         agreements entered into in October 2020 related to the Hardin Station 
are or contain leases
         under ASC 842. Also address the power purchase and data facility 
services agreements as
         part of your analysis. In addition, tell us and disclose how the build 
out costs are being
         paid for.
 Hugh Gallagher
FirstName   LastNameHugh
Marathon Digital  Holdings,Gallagher
                           Inc.
Comapany
April       NameMarathon Digital Holdings, Inc.
       8, 2022
April 38, 2022 Page 3
Page
FirstName LastName
9.       Please provide us with your detailed accounting analysis of whether 
the agreement with
         Compute North, LLC entered into on May 21, 2021 is or contains a lease 
under ASC 842.
         Also provide your evaluation under ASC 842 of the hosting agreements 
with Compute
         North, LLC.
10.      We note that you own 82% of the equity in the Marathon Compute North 1 
LLC joint
         venture (the "LLC") with Compute North and the LLC has entered into a 
hosting
         agreement with Compute North to host bitcoin miners. Explain and 
disclose how you are
         accounting for the income from this hosting arrangement. Tell us 
whether you own these
         bitcoin miners and if they are subject to the hosting agreement 
between the Company and
         Compute North.
Note 2 - Summary of Significant Accounting Policies
Digital Currencies, page F-13

11.      Please tell why you believe pricing of BTC on a nightly basis is the 
proper time to use in
         the quantitative impairment test of the mined BTC balances as well as 
for the recordation
         of daily revenues. Cite the literature that supports your accounting. 
Refer to ASC 350-
         30-35-20.
Property and Equipment, page F-14

12.      We note that you changed the estimate of the expected life of 
transaction verification
         servers from two years to five years subsequent to December 31, 2020. 
Please revise to
         disclose the effect of this change in accounting estimate. Refer to 
ASC 250-10-50-4.
Investment Fund, page F-15

13.      Please explain how you are accounting for your limited partnership 
agreement with
         NYDIG Digital Assets Fund III, LP and cite the authoritative 
accounting guidance relied
         upon. Also explain how the Fund was established and describe the 
general terms of the
         agreement. We note that you own 100% of the limited partnership 
interest. Address
         whether the general partner or any other parties also hold any 
interests in the Fund.
          Explain the rights and responsibilities of the general partner and 
investment manager in
         more detail. Please also address whether the agreement provides you 
with substantive
         kick-out or participating rights. In addition, please provide us with 
your detailed
         accounting analysis of how the Fund qualifies as an investment company 
for accounting
         purposes under ASC 946. Refer to ASC 946-10-15.
Revenue Recognition , page F-15

14.      Please clarify when you recognize revenue. Your disclosure states that 
you recognize
         revenue at the date you receive confirmation of the consideration you 
will receive;
         however, you also state that you measure the non-cash consideration at 
fair value on the
         date received. Tell us the time frame between confirmation of the 
consideration and the
         receipt of the consideration. Explain how you recognize revenue before 
you have
 Hugh Gallagher
Marathon Digital Holdings, Inc.
April 8, 2022
Page 4
         determined the fair value. Also tell us how you comply with ASC 
606-10-32-21 to 32-24.
          That is, please provide us with your analysis of how you comply with 
the requirement to
         recognize the estimated fair value of the non-cash consideration at 
contract inception.
15.      Please clarify whether some or all of your mining activity is 
conducted with other third
         party pool participants and collectively provides transaction 
verification services to the
         blockchain network through a pool operator. If so, clearly disclose 
the reward sharing
         mechanism you select when participating in mining pools. Explain how 
you are
         accounting for any fees retained by the pool operator. In addition, 
tell us and disclose the
         amount of rewards earned from mining separately from fees earned for 
transaction
         verification.
16.      We note from disclosures elsewhere in your filing that you operate 
your own bitcoin
         mining pools. Explain to us and disclose how you recognize revenue as 
a pool operator.
         Ensure your disclosure addresses the nature, amount, timing, and 
uncertainty of revenue
         and cash flows arising from these arrangements.
       In closing, we remind you that the company and its management are 
responsible for the
accuracy and adequacy of their disclosures, notwithstanding any review, 
comments, action or
absence of action by the staff.

       You may contact Melissa Walsh, Staff Accountant, at (202) 551-3224 or 
Stephen
Krikorian, Accounting Branch Chief, at (202) 551-3488 with any questions.



FirstName LastNameHugh Gallagher                               Sincerely,
Comapany NameMarathon Digital Holdings, Inc.
                                                               Division of 
Corporation Finance
April 8, 2022 Page 4                                           Office of 
Technology
FirstName LastName