Greenidge president gets RSU grant, tax shares withheld

Greenidge Generation Holdings Inc. President Dale Irwin reported routine equity compensation activity involving Class A Common Stock.

Rhea-AI Filing Summary

Greenidge Generation Holdings Inc. President Dale Irwin reported routine equity compensation activity involving Class A Common Stock. On March 4, 2026, he received a grant of 110,000 restricted stock units as bonus compensation for fiscal year 2025, which vested immediately and converted into shares. On March 11, 2026, 39,655 shares were withheld at $1.38 per share to cover his tax liability related to this vesting, a non-discretionary tax-withholding disposition rather than an open-market sale. After these transactions, he directly held 173,630 shares of Class A Common Stock. The filing notes it was submitted late due to an administrative oversight tied to migration to a new employee stock administration platform, and states this delay was not the result of any error by the reporting person.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Irwin Dale

Role President

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Class A Common Stock	39,655	$1.38	$55K
Grant/Award	Class A Common Stock	110,000	$0.00	$0.00

Holdings After Transaction: Class A Common Stock — 173,630 shares (Direct)

Footnotes (3)

1. F1. This Form 4 is being filed late due to an inadvertent administrative oversight related to the Issuer's migration to a new employee stock administration platform, which delayed the timely reporting of the transaction and was not the result of any error by the Reporting Person.
2. F2. Represents restricted stock units granted as bonus compensation for fiscal year 2025 pursuant to the Issuer's Third Amended and Restated 2021 Equity Incentive Plan. Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock and vested immediately.
3. F3. Represents the number of shares withheld to cover the Reporting Person's tax liability in connection with the vesting of certain restricted stock units and does not represent a discretionary sale by the Reporting Person.

FAQ

What insider transactions did Greenidge (GREE) President Dale Irwin report?

Dale Irwin reported a grant of 110,000 restricted stock units that vested immediately, and a related withholding of 39,655 shares to cover tax liabilities. Both transactions involved Class A Common Stock and reflect routine equity compensation rather than open-market trading activity.

Was there an open-market sale in the latest GREE Form 4 filing?

No, the Form 4 shows no open-market sale. The 39,655 Class A shares were withheld by the issuer at $1.38 per share solely to satisfy Dale Irwin’s tax liability from RSU vesting, described as a non-discretionary tax-withholding disposition.

How large was the equity award reported by Greenidge (GREE) President Dale Irwin?

The filing shows an award of 110,000 restricted stock units of Class A Common Stock. These RSUs were granted as bonus compensation for fiscal year 2025 under the company’s equity incentive plan and vested immediately into an equivalent number of shares.

What are Dale Irwin’s Greenidge (GREE) share holdings after these transactions?

After the RSU grant and related tax withholding, Dale Irwin directly holds 173,630 shares of Greenidge Class A Common Stock. This figure reflects his post-transaction position as reported in the Form 4 and provides context for the scale of the compensation-related movements.

Why was the Greenidge (GREE) Form 4 for Dale Irwin filed late?

The Form 4 states it was filed late due to an inadvertent administrative oversight during Greenidge’s migration to a new employee stock administration platform. The footnote specifies the delay was not the result of any error by the reporting person, Dale Irwin.

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Accepted by SEC EDGAR 03/13/2026 - 06:37 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Irwin Dale

(Last) (First) (Middle)

C/O GREENIDGE GENERATION HOLDINGS INC.

1159 PITTSFORD-VICTOR ROAD, SUITE 240

(Street)

PITTSFORD NY 14534

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Greenidge Generation Holdings Inc. [ GREE ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	03/04/2026(1)(2)		A		110,000	A	$0	213,285	D
Class A Common Stock	03/11/2026(3)		F		39,655	D	$1.38	173,630	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This Form 4 is being filed late due to an inadvertent administrative oversight related to the Issuer's migration to a new employee stock administration platform, which delayed the timely reporting of the transaction and was not the result of any error by the Reporting Person.

2. Represents restricted stock units granted as bonus compensation for fiscal year 2025 pursuant to the Issuer's Third Amended and Restated 2021 Equity Incentive Plan. Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock and vested immediately.

3. Represents the number of shares withheld to cover the Reporting Person's tax liability in connection with the vesting of certain restricted stock units and does not represent a discretionary sale by the Reporting Person.

Remarks:

	/s/ Dale Irwin	03/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.