Hydrofarm (HYFM) CAO shares withheld for RSU vesting tax obligations

Rhea-AI Filing Summary

Hydrofarm Holdings Group, Inc. reported an insider equity transaction by its CAO and Corporate Controller, Erica Ackerman. On 01/06/2026, 687 shares of common stock were withheld at $1.51 per share to satisfy tax withholding related to the vesting of 1,666 stock-settled restricted stock units, which convert into common shares on a 1-for-1 basis. Following this tax-withholding event, Ackerman beneficially owns 7,540 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^*

Ackerman Erica

(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)
	CAO and Corporate Controller

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		687(1)	D	$1.51	7,540	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 1,666 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/ Erica Ackerman	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).
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FAQ

What insider transaction did Hydrofarm (HYFM) report for Erica Ackerman?

The company reported that CAO and Corporate Controller Erica Ackerman had 687 shares of Hydrofarm common stock withheld on 01/06/2026 to cover tax obligations.

What does transaction code "F" mean in this Hydrofarm (HYFM) Form 4?

Transaction code "F" indicates shares were withheld to pay taxes in connection with the vesting of equity awards, rather than an open-market sale.

How many Hydrofarm (HYFM) shares does Erica Ackerman own after this transaction?

After the reported tax-withholding transaction, Erica Ackerman beneficially owns 7,540 shares of Hydrofarm common stock directly.

What equity award vesting triggered the Hydrofarm (HYFM) tax withholding?

The withholding relates to the vesting of 1,666 stock-settled restricted stock units, which may be settled on a 1-for-1 basis in Hydrofarm common stock.

Was the Hydrofarm (HYFM) insider transaction an open-market sale?

No. The Form 4 shows 687 shares were withheld to satisfy tax withholding on RSU vesting, rather than being sold in the open market.

Is Erica Ackerman a major shareholder of Hydrofarm (HYFM)?

The filing identifies Erica Ackerman as an officer (CAO and Corporate Controller) and does not mark her as a 10% owner.