Exhibit 21.1
List of Subsidiaries
Greenidge Generation Holdings Inc.’s subsidiaries are listed below.
| Name of Subsidiary | Jurisdiction of Formation | |
| Greenidge Generation LLC | New York | |
| Lockwood Hills LLC | New York | |
| Greenidge Solar LLC | Delaware | |
| Greenidge Pipeline LLC | Delaware | |
| Greenidge Pipeline Properties Corporation | New York | |
| Greenidge Markets and Trading LLC | Delaware | |
| Greenidge Generation Blocker Inc. | Delaware | |
| Greenidge Generation Holdings LLC | Delaware | |
| Greenidge Secured Lending LLC | Delaware | |
| Support.com, Inc. | Delaware | |
