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Hydrofarm Holdings (HYFM) President reports 740-share tax withholding on RSU vesting

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

HYDROFARM HOLDINGS GROUP, INC. President Mark S. Parker reported a tax-related share disposition. On 2026-08-08, 740 shares of common stock were withheld at $1.60 per share to satisfy a tax withholding obligation arising from the vesting of 1,667 stock-settled restricted stock units. After this withholding, Parker directly held 18,558 shares of common stock.

Positive

  • None.

Negative

  • None.
Insider PARKER MARK S
Role President
Type Security Shares Price Value
Tax Withholding Common Stock, $0.0001 par value per share F1 740 $1.60 $1K
Holdings After Transaction: Common Stock, $0.0001 par value per share — 18,558 shares (Direct)
Footnotes (1)
  1. F1. Shares withheld to satisfy tax withholding obligation applicable to the vesting of 1,667 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
Shares withheld for taxes 740 shares Common stock withheld on 2026-08-08 to satisfy tax withholding obligation
Transaction price per share $1.60 per share Value used for the 740-share tax-withholding disposition
Shares held after transaction 18,558 shares Direct HYFM common stock holdings of Mark S. Parker following the withholding
Restricted stock units vested 1,667 units Stock-settled RSUs vesting, settled 1-for-1 in common stock, triggering tax withholding
stock-settled restricted stock units financial
"Shares withheld to satisfy tax withholding obligation applicable to the vesting of 1,667 stock-settled restricted stock units"
tax withholding obligation financial
"Shares withheld to satisfy tax withholding obligation applicable to the vesting of 1,667 stock-settled restricted stock units"
1-for-1 basis financial
"which may be settled, on a 1-for-1 basis, only in shares of common stock"

FAQ

What insider transaction did HYFM President Mark S. Parker report?
Mark S. Parker reported 740 shares of HYFM common stock were withheld on 2026-08-08 at $1.60 per share to cover tax withholding on vesting restricted stock units, leaving him with 18,558 shares directly held.

Was the HYFM Form 4 transaction a discretionary sale by Mark S. Parker?
The Form 4 shows no open-market sale; instead, 740 shares were withheld to satisfy tax withholding obligations related to the vesting of 1,667 stock-settled restricted stock units of Hydrofarm Holdings Group, Inc. (HYFM).

How many HYFM shares does Mark S. Parker hold after this Form 4 transaction?
After the transaction, Mark S. Parker directly holds 18,558 shares of HYFM common stock. This figure reflects his position following the tax-withholding disposition of 740 shares on 2026-08-08 tied to RSU vesting.

What price per share was used for the HYFM tax-withholding transaction?
The tax-withholding disposition used a value of $1.60 per share for 740 shares of HYFM common stock. This price is shown as the transaction price per share for the shares withheld to cover the tax obligation on vested RSUs.

How many HYFM restricted stock units vested in connection with this Form 4?
The footnote states that 1,667 stock-settled restricted stock units vested, each settled on a 1-for-1 basis in HYFM common shares. To satisfy tax withholding on this vesting, 740 shares were withheld from Mark S. Parker.

Does the HYFM Form 4 indicate a Rule 10b5-1 trading plan for this transaction?
The filing’s Rule 10b5-1 checkbox is not marked as a plan transaction. The transaction is described instead as shares withheld to satisfy tax withholding obligations on the vesting of 1,667 restricted stock units of HYFM.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
PARKER MARK S
(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
President
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/08/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock, $0.0001 par value per share08/08/2026F740(1)D$1.618,558D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Shares withheld to satisfy tax withholding obligation applicable to the vesting of 1,667 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/ Mark Parker08/11/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR