STOCK TITAN

Hydrofarm President Mark S. Parker buys 22,099 shares

Hydrofarm Holdings Group, Inc. (HYFM) President Mark S. Parker purchased 22,099 common shares on October 27, 2026, at $0.905 per share, bringing his directly held common shares to 40,657.

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Form Type
4

Rhea-AI Filing Summary

Hydrofarm Holdings Group, Inc. (HYFM) President Mark S. Parker purchased 22,099 common shares on October 27, 2026, at $0.905 per share, bringing his directly held common shares to 40,657. He also acquired 22,099 common warrants. The warrants may be exercised one-for-one at $0.78 per share, subject to a 9.99% beneficial-ownership limit, and expire five and a half years after issuance.

Insider PARKER MARK S
Role President
Bought 44,198 shs
Increase in Position 119.1%
Type Security Shares Price Value
Purchase Common Warrant F1, F2 22,099 -- --
Purchase Common Stock, $0.0001 par value per share F1 22,099 $0.905 $20K
Holdings After Transaction: Common Warrant — 22,099 contracts (Direct); Common Stock, $0.0001 par value per share — 40,657 shares (Direct)
Holdings Before and After: Common Warrant, 0 to 22,099 contracts (Direct); Common Stock, $0.0001 par value per share, 18,558 to 40,657 shares (Direct)
Footnotes (2)
  1. F1. On October 27, 2026, Issuer entered into a Securities Purchase Agreement (the "Purchase Agreement") with the purchasers signatory thereto and consummated the transactions contemplated thereunder. Pursuant to the Purchase Agreement, Issuer agreed to issue and sell to Reporting Person (i) in a registered direct offering 3,837 shares of Common Stock, $0.0001 par value per share ("Common Stock") and (ii) in a concurrent private placement 18,262 shares of Common Stock and 22,099 accompanying common stock purchase warrants to purchase shares of Common Stock (the "Common Warrants").
  2. F2. The Common Warrants may be exercised on a one-for-one basis for shares of Common Stock at an exercise price of $0.78 per share of Common Stock, to the extent that after giving effect to such exercise the Reporting Person would beneficially own, for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, no more than 9.99% of the outstanding shares of Common Stock. The Common Warrants will expire five and a half years following the date of issuance.
Common shares purchased 22,099 shares October 27, 2026
Common-stock purchase price $0.905 per share October 27, 2026 purchase
Direct common shares held after purchase 40,657 shares Reported after the October 27, 2026 purchase
Common warrants acquired 22,099 warrants October 27, 2026
Warrant exercise price $0.78 per share Common Warrants exercisable one-for-one
Beneficial-ownership limit 9.99% Applies after giving effect to warrant exercise
Warrant expiration term Five and a half years after issuance Common Warrants
registered direct offering financial
"in a registered direct offering"
A registered direct offering is a way for a company to sell new shares of its stock directly to select investors with regulatory approval. This method allows the company to raise funds quickly and efficiently without needing a public auction, similar to offering exclusive access to a limited number of buyers. For investors, it often provides an opportunity to purchase shares at a favorable price, while giving the company immediate access to capital.
private placement financial
"in a concurrent private placement"
A private placement is a sale of securities directly to a selected group of investors, typically institutions or accredited investors, instead of through a public offering. It lets a company raise money faster and with fewer regulatory steps; for existing shareholders it matters because the newly issued shares, often sold at a discount, increase the share count and can dilute their ownership.
exercise price financial
"at an exercise price of $0.78 per share"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
one-for-one basis financial
"exercised on a one-for-one basis"

FAQ

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

What did HYFM President Mark S. Parker purchase?

Mark S. Parker purchased 22,099 common shares at $0.905 per share and acquired 22,099 common warrants on October 27, 2026. His directly held common shares after the purchase totaled 40,657. No Rule 10b5-1 plan is reported.

What are the terms of Mark S. Parker’s HYFM warrants?

Each warrant may be exercised for one common share at $0.78 per share, subject to the condition that exercise would leave Mark S. Parker beneficially owning no more than 9.99% of outstanding common shares. The warrants expire five and a half years after issuance.

How was the HYFM stock-and-warrant purchase structured?

The issuer agreed to issue and sell 3,837 shares in a registered direct offering and 18,262 common shares plus 22,099 accompanying warrants in a concurrent private placement. The transactions were consummated on October 27, 2026.

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

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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)
10/27/2026
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 share10/27/2026P(1)22,099A$0.90540,657D
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
Common Warrant$0.7810/27/2026P(1)22,099 (2) (2)Common Stock, $0.0001 par value per share22,099(1)22,099D
Explanation of Responses:
1. On October 27, 2026, Issuer entered into a Securities Purchase Agreement (the "Purchase Agreement") with the purchasers signatory thereto and consummated the transactions contemplated thereunder. Pursuant to the Purchase Agreement, Issuer agreed to issue and sell to Reporting Person (i) in a registered direct offering 3,837 shares of Common Stock, $0.0001 par value per share ("Common Stock") and (ii) in a concurrent private placement 18,262 shares of Common Stock and 22,099 accompanying common stock purchase warrants to purchase shares of Common Stock (the "Common Warrants").
2. The Common Warrants may be exercised on a one-for-one basis for shares of Common Stock at an exercise price of $0.78 per share of Common Stock, to the extent that after giving effect to such exercise the Reporting Person would beneficially own, for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, no more than 9.99% of the outstanding shares of Common Stock. The Common Warrants will expire five and a half years following the date of issuance.
/s/ Mark Parker10/29/2026
** 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)

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