[Form 4] Hydrofarm Holdings Group, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Erica Ackerman, listed as Chief Accounting Officer and Corporate Controller of Hydrofarm Holdings Group, Inc. (HYFM), reported a securities transaction dated 08/11/2025 involving the company’s common stock.

The filing discloses that 333 stock-settled restricted stock units (RSUs) vested and shares were withheld to satisfy the related tax withholding obligation. The withholding activity is shown at a per-share amount of $4.49. After the reported transaction the reporting person is shown as beneficially owning 8,227 shares of common stock directly. The RSUs may be settled 1-for-1 in common shares and fractional amounts were rounded.

Positive

• 333 RSUs vested, converting compensation into equity
• Post-transaction direct beneficial ownership: 8,227 shares, explicitly disclosed

Negative

• None.

Insights

Securities Analyst

TL;DR: Routine insider tax-withholding on vested RSUs; not likely material to investors.

The Form 4 shows a common, non-sale related transaction: 333 RSUs vested and shares were withheld to meet tax obligations, recorded at $4.49 per share. Post-transaction direct beneficial ownership is 8,227 shares. This is a standard compensation-related event rather than an active buy/sell signal. The numbers are small relative to typical public-company float and do not indicate a change in control or a material shift in insider ownership.

Corporate Governance Expert

TL;DR: Disclosure is routine and compliant; it documents equity compensation settlement mechanics.

The report documents the settlement mechanics of equity compensation: stock-settled RSUs vesting with shares withheld for taxes and fractional rounding noted. The filing identifies the reporting person as the company’s CAO and Corporate Controller and was filed as an individual Form 4. This disclosure meets Section 16 reporting requirements and provides transparency on insider compensation conversion into common stock.

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

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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)
08/11/2025

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	08/11/2025		F		52(1)	D	$4.49	8,227	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 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/ Erica Ackerman	08/13/2025
	** 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 transaction did Erica Ackerman report on Form 4 for HYFM?

The Form 4 reports the vesting of 333 stock-settled RSUs and shares withheld to satisfy the associated tax withholding obligation.

When was the transaction executed for HYFM insider activity?

The transaction date shown in the filing is 08/11/2025.

How many shares does the reporting person own after the reported transaction for HYFM?

Following the reported transaction the reporting person beneficially owns 8,227 shares of HYFM common stock directly.

At what price were the withheld shares recorded in the HYFM Form 4?

The filing shows a per-share amount of $4.49 associated with the reported transaction.

Were the vested RSUs in HYFM settled on a 1-for-1 basis?

Yes, the filing states the RSUs may be settled, on a 1-for-1 basis, only in shares of common stock and that fractional amounts were rounded.