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                               April 23, 2024

       Christian Mulvihill
       Chief Financial Officer
       Greenidge Generation Holdings Inc.
       135 Rennell Drive, 3rd Floor
       Fairfield, CT 06890

                                                        Re: Greenidge
Generation Holdings Inc.
                                                            Form 10-K for the
Fiscal Year Ended December 31, 2023
                                                            File No. 001-40808

       Dear Christian Mulvihill:

              We have reviewed your February 29, 2024 response to our comment
letter and have the
       following comments.

              Please respond to this letter 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 a
       comment applies to your facts and circumstances, please tell us why in
your response.

               After reviewing your response to this letter, we may have
additional comments. Unless
       we note otherwise, any references to prior comments are to comments in
our December 19, 2023
       letter.

       Form 10-K for the Fiscal Year Ended December 31, 2023

       Significant Accounting Policies
       Cryptocurrency Mining Revenue, page F-14

   1.                                                   We note your response
to prior comment 2 and your revised cryptocurrency mining
                                                        revenue policy
disclosure on page F-14. In your revised disclosure you state that you are
                                                        entitled to
compensation even if the pool operator is unsuccessful in placing a block.
                                                        However, your
disclosure also implies you receive a share of the rewards paid to the pool
                                                        operator for successful
efforts. Please revise your disclosure in future filings to reconcile
                                                        the two statements and
clearly state that as a participant in an FPPS mining pool your
                                                        compensation is not
contingent on the pool operator successfully placing a block.

   2.                                                   We note your response
to the third bullet in prior comment 2, that you consider each
                                                        mining pool arrangement
to be a contract that is continuously renewed, that the duration
                                                        of each contract is 24
hours or less and provides the same rate of payment upon renewal
 Christian Mulvihill
Greenidge Generation Holdings Inc.
April 23, 2024
Page 2
         and that since the pricing remains the same upon contract renewal, the
contract does not
         provide the applicable mining pool operator with a material right that
represents a separate
         performance obligation. Please enhance your cryptocurrency mining
revenue policy to
         disclose in future filings.
       Please contact David Irving at 202-551-3321 or Michelle Miller at
202-551-3368 if you
have questions regarding comments on the financial statements and related
matters.



FirstName LastNameChristian Mulvihill                          Sincerely,
Comapany NameGreenidge Generation Holdings Inc.
                                                               Division of
Corporation Finance
April 23, 2024 Page 2                                          Office of Crypto
Assets
FirstName LastName