STOCK TITAN

Hydrofarm CFO O’Brien acquires 55,248 shares

The CFO's warrants have a $0.78 exercise price, a 9.99% beneficial-ownership limit and a five-and-a-half-year term.

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Form Type
4

Rhea-AI Filing Summary

Hydrofarm Holdings Group, Inc. issued and sold 55,248 common shares to CFO Kevin Patrick O’Brien at $0.905 per share: 9,593 shares in a registered direct offering and 45,655 in a concurrent private placement. O’Brien also acquired 55,248 common warrants, exercisable one-for-one at $0.78 per share, subject to a 9.99% beneficial-ownership limit. The warrants expire five and a half years after issuance. His direct common-stock holdings following the acquisition were 68,470 shares.

Insider O'Brien Kevin Patrick
Role Chief Financial Officer
Type Security Shares Price Value
Grant/Award Common Warrant F1, F2 55,248 -- --
Grant/Award Common Stock, $0.0001 par value per share F1 55,248 $0.905 $50K
Holdings After Transaction: Common Warrant — 55,248 contracts (Direct); Common Stock, $0.0001 par value per share — 68,470 shares (Direct)
Holdings Before and After: Common Warrant, 0 to 55,248 contracts (Direct); Common Stock, $0.0001 par value per share, 13,222 to 68,470 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 9,593 shares of Common Stock, $0.0001 par value per share ("Common Stock") and (ii) in a concurrent private placement 45,655 shares of Common Stock and 55,248 accompanying common stock purchase warrants to purchase shares of Common Stock (the "Common Warrants"). The transaction was approved by the Issuer's board of directors in accordance with Rule 16b-3.
  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 acquired 55,248 shares Kevin Patrick O’Brien’s common-stock acquisition
Common-share price $0.905 per share Price for the common shares acquired
Common shares held following transaction 68,470 shares Direct holdings following the acquisition
Common warrants acquired 55,248 warrants Warrants to purchase common shares
Warrant exercise price $0.78 per share Common warrant exercise price
Beneficial-ownership limitation 9.99% Maximum beneficial ownership after warrant exercise
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.
concurrent private placement financial
"in a concurrent private placement"
A concurrent private placement is a sale of a company’s shares or bonds directly to a select group of investors that happens at the same time as another financing action or offering. Think of it as quietly selling a block of tickets to a few people while a larger ticket drive is underway; it raises cash quickly but can change ownership proportions, dilute existing shareholders and affect share price, so investors watch it as a sign of funding needs and potential value shifts.
Common Warrants technical
"55,248 accompanying common stock purchase warrants"
A common warrant is a tradable instrument that gives its holder the right to buy a company’s common shares at a fixed price within a set time period, similar to a coupon that can be redeemed later to purchase stock. Investors care because exercising warrants can boost potential gains if the stock rises, but it can also dilute existing shareholders by increasing the number of shares outstanding, which can lower per-share value.
beneficially own regulatory
"would beneficially own ... no more than 9.99%"
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
Rule 16b-3 regulatory
"approved ... in accordance with Rule 16b-3"
Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.

FAQ

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

How many HYFM common shares did Kevin Patrick O’Brien acquire?

Kevin Patrick O’Brien acquired 55,248 common shares at $0.905 per share. The shares comprised 9,593 in a registered direct offering and 45,655 in a concurrent private placement; his direct common-stock holdings following the acquisition were 68,470 shares.

What are the terms of Kevin Patrick O’Brien’s HYFM warrants?

O’Brien acquired 55,248 common warrants, exercisable one-for-one for common shares at $0.78 per share. Exercise is limited so that, after exercise, he would beneficially own no more than 9.99% of outstanding common shares. The warrants expire five and a half years after issuance.

How was Kevin Patrick O’Brien’s HYFM transaction approved?

The transaction was approved by Hydrofarm Holdings Group, Inc.’s board of directors in accordance with Rule 16b-3.

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*
O'Brien Kevin Patrick

(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)
Chief Financial Officer
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 share10/27/2006A(1)55,248A$0.90568,470D
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$0.7810/27/2026A(1)55,248 (2) (2)Common Stock, $0.0001 par value per share55,248(1)55,248D
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 9,593 shares of Common Stock, $0.0001 par value per share ("Common Stock") and (ii) in a concurrent private placement 45,655 shares of Common Stock and 55,248 accompanying common stock purchase warrants to purchase shares of Common Stock (the "Common Warrants"). The transaction was approved by the Issuer's board of directors in accordance with Rule 16b-3.
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/ Kevin Patrick O'Brien10/29/2026
** 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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