Christian Mulvihill - 13 Oct 2025 Form 4 Insider Report for Greenidge Generation Holdings Inc. (GREE)

Role: Chief Financial Officer
Signature: /s/ Christian Mulvihill
Issuer symbol: GREE
Transactions as of: 13 Oct 2025
Transactions value $: -$1,261
Form type: 4
Filing time: 15 Oct 2025, 17:47:50 UTC
Previous filing: 17 Sep 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Mulvihill Christian	Chief Financial Officer	C/O GREENIDGE GENERATION HOLDINGS INC., 1159 PITTSFORD-VICTOR ROAD, SUITE 240, PITTSFORD	/s/ Christian Mulvihill	15 Oct 2025	0001998358

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GREE	Class A Common Stock	Sale	-$1.26K	-609	-0.62%	$2.07	97.4K	13 Oct 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents the number of shares sold to cover the tax withholding obligations in connection with the vesting of certain restricted stock units and does not represent a discretionary sale by the Reporting Person.