October 4, 2021


Division of Corporation Finance

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Attention: Matthew Crispino, Staff Attorney

                 Jan Woo, Legal Branch Chief

                 Office of Technology


RE:    Greenidge Generation Holdings Inc.
   Registration Statement on Form S-1
   File No. 333-259637
   Request for Acceleration

Ladies and Gentlemen:

Pursuant to Rule 461 under the Securities Act of 1933, as amended (the “Securities Act”), Greenidge Generation Holdings Inc. (the “Company”) hereby requests that the effective date of the above-referenced Registration Statement on Form S-1 (the “Registration Statement”) be accelerated by the Securities and Exchange Commission so that the Registration Statement, as then amended, will be declared effective under the Securities Act at 2:00 p.m. Eastern Daylight Time on October 6, 2021, or as soon thereafter as is practicable, or such other time as the Company or its outside counsel, Shearman & Sterling LLP, may request by telephone that such Registration Statement be declared effective.

We request that we be notified of such effectiveness by a telephone call to Richard Alsop of Shearman & Sterling LLP at (212) 848-7333 and that such effectiveness also be confirmed in writing.


Very truly yours,

/s/ Jeffrey E. Kirt

Name:   Jeffrey E. Kirt
Title:   Chief Executive Officer

cc:    Richard Alsop, Esq.

         Kristina Trauger, Esq.

         Shearman & Sterling LLP