Hydrofarm (HYFM) president reports 1,672 shares withheld for RSU taxes

Rhea-AI Filing Summary

Hydrofarm Holdings Group, Inc. president Mark S. Parker reported a routine share withholding related to equity compensation. On January 6, 2026, 1,672 shares of common stock were withheld at $1.51 per share to satisfy tax obligations from the vesting of 3,333 stock-settled restricted stock units, which are deliverable on a one-for-one basis in common shares. After this tax withholding, Parker beneficially owned 19,328 shares of Hydrofarm common stock directly.

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

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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^*

PARKER MARK S

(Last) (First) (Middle)

1510 MAIN STREET

(Street)

SHOEMAKERSVILLE PA 19555

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
HYDROFARM HOLDINGS GROUP, INC. [ HYFM ]

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)
01/06/2026

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
Common Stock, $0.0001 par value per share	01/06/2026		F		1,672(1)	D	$1.51	19,328	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. Shares withheld to satisfy tax withholding obligation applicable to the vesting of 3,333 stock-settled restricted stock units, which may be settled, on a 1-for-1 basis, only in shares of common stock. Fractional amounts have been rounded to the nearest whole number

Remarks:

	/s/ Mark Parker	01/08/2026
	** 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.

FAQ

What insider transaction did HYFM president Mark S. Parker report?

Mark S. Parker reported that 1,672 shares of Hydrofarm common stock were withheld on January 6, 2026 to cover taxes on vested restricted stock units.

What was the price per share for the Hydrofarm (HYFM) shares withheld?

The 1,672 shares of Hydrofarm common stock were withheld at a price of $1.51 per share in connection with the tax withholding.

How many Hydrofarm shares does Mark S. Parker own after this Form 4 transaction?

Following the reported tax withholding transaction, Mark S. Parker beneficially owned 19,328 shares of Hydrofarm common stock directly.

Was the HYFM insider transaction a sale or a tax withholding event?

The Form 4 describes a tax withholding event, where 1,672 shares were withheld to satisfy taxes on vesting of 3,333 restricted stock units, rather than an open-market sale.

What equity award was associated with this Hydrofarm Form 4 filing?

The withholding related to the vesting of 3,333 stock-settled restricted stock units, which may be settled on a 1-for-1 basis in Hydrofarm common stock.

What is Mark S. Parker’s role at Hydrofarm Holdings Group, Inc.?

In this filing, Mark S. Parker is identified as an officer of Hydrofarm Holdings Group, Inc., holding the title of President.