Hydrofarm CAO reports 138-share tax withholding

HYDROFARM HOLDINGS GROUP, INC. executive Erica Ackerman, CAO and Corporate Controller, reported a code F transaction involving 138 shares of common stock on 2026-08-08.

Rhea-AI Filing Summary

HYDROFARM HOLDINGS GROUP, INC. executive Erica Ackerman, CAO and Corporate Controller, reported a code F transaction involving 138 shares of common stock on 2026-08-08. The shares were withheld to satisfy tax withholding obligations tied to the vesting of 334 stock-settled restricted stock units, based on a price of $1.60 per share. After this tax-withholding disposition, Ackerman directly holds 7,402 shares of HYDROFARM common stock.

Insider Trade Summary

Tax Withholding: 138 shares

Tax Withholding 1 txn

Insider Ackerman Erica

Role CAO and Corporate Controller

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock, $0.0001 par value per share F1	138	$1.60	$220.80

Holdings After Transaction: Common Stock, $0.0001 par value per share — 7,402 shares (Direct)

Footnotes (1)

1. F1. Shares withheld to satisfy tax withholding obligation applicable to the vesting of 334 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

Key Figures

Shares withheld for taxes: 138 shares Withholding price: $1.60 per share RSUs vested: 334 stock-settled restricted stock units +1 more

4 metrics

Shares withheld for taxes 138 shares Common stock withheld on 2026-08-08 for tax withholding obligation

Withholding price $1.60 per share Value used for 138 withheld shares of common stock

RSUs vested 334 stock-settled restricted stock units Vesting triggered the tax withholding; RSUs settle 1-for-1 in common stock

Shares owned after transaction 7,402 shares Direct ownership of Hydrofarm common stock following the 2026-08-08 transaction

Key Terms

restricted stock units, stock-settled restricted stock units, tax withholding obligation

3 terms

restricted stock units financial

"vesting of 334 stock-settled restricted stock units, which may be settled"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

stock-settled restricted stock units financial

"vesting of 334 stock-settled restricted stock units, which may be settled"

tax withholding obligation financial

"Shares withheld to satisfy tax withholding obligation applicable to the vesting"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did HYFM report for Erica Ackerman?

HYDROFARM HOLDINGS GROUP, INC. reported that Erica Ackerman had 138 shares of common stock withheld on 2026-08-08. The shares were used to satisfy tax withholding obligations related to the vesting of restricted stock units.

How many HYFM shares were involved in Erica Ackerman’s Form 4 filing?

The Form 4 shows 138 shares of HYDROFARM common stock, valued at $1.60 per share, were withheld. These shares covered taxes on the vesting of 334 stock-settled restricted stock units that settle 1-for-1 in common stock.

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

Following the reported tax-withholding disposition, Erica Ackerman directly holds 7,402 shares of HYDROFARM common stock. This figure reflects her post-transaction ownership as reported in the Form 4 filing for the 2026-08-08 event.

Was Erica Ackerman’s HYFM Form 4 transaction under a Rule 10b5-1 plan?

The filing’s Rule 10b5-1 checkbox is not marked as affirmed, and the transaction is described as tax withholding. There is no indication in the reported data that this disposition occurred under a Rule 10b5-1 trading plan.

What triggered the tax withholding for Erica Ackerman’s HYFM shares?

The tax withholding was triggered by the vesting of 334 stock-settled restricted stock units. According to the footnote, these RSUs may be settled 1-for-1 in HYDROFARM common stock, and shares were withheld to meet the related tax obligation.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/11/2026 - 04:17 PM Accepted by SEC EDGAR 08/11/2026 - 04:17 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^*

Ackerman Erica

(Last) (First) (Middle)

1510 MAIN STREET

(Street)

SHOEMAKERSVILLE PENNSYLVANIA 19555

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/08/2026

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

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

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

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	08/08/2026		F		138(1)	D	$1.6	7,402	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 334 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

	/s/ Erica Ackerman	08/11/2026
	** 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.
* Form 4: SEC 1474 (03-26)