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  4. [Form 4] GRIFFON CORP Insider Trading Activity

Griffon Corp (GFF) COO Robert Mehmel reports 22,567-share stock sale under plan

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Griffon Corp22,567 shares$103$1084,219 shares

Positive

  • None.

Negative

  • None.

Insights

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Insider MEHMEL ROBERT F
Role President and COO
Sold 22,567 shs ($2.40M)
Type Security Shares Price Value
Sale Common Stock F4 3,638 $104.08 $379K
Sale Common Stock F5 2,913 $104.64 $305K
Sale Common Stock F6 88 $105.21 $9K
Sale Common Stock F1 1,911 $106.60 $204K
Sale Common Stock F2 13,464 $107.43 $1.45M
Sale Common Stock F3 553 $108.09 $60K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 726,272 shares (Direct); Common Stock — 4,219 shares (Indirect, by ESOP)
Footnotes (6)
  1. F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.22 to $106.99, inclusive. The reporting person undertakes to provide Griffon Corporation, any security holder of Griffon Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares disposed of at each price within the ranges set forth in footnotes (1), (2), (3), (4), (5) and (6) to this Form 4.
  2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.00 to $107.96, inclusive.
  3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.00 to $108.24, inclusive.
  4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.32 to $104.31, inclusive.
  5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.32 to $104.97, inclusive.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.00 to $105.63, inclusive.
Total shares sold 22,567 shares Aggregate non-derivative sale transactions reported in this Form 4
Shares sold 2026-08-07 at $106.60 1,911 shares Open-market sale at weighted average price $106.6000
Shares sold 2026-08-07 at $107.43 13,464 shares Open-market sale at weighted average price $107.4300
Shares sold 2026-08-07 at $108.09 553 shares Open-market sale at weighted average price $108.0900
Shares sold 2026-08-10 at $104.08 3,638 shares Open-market sale at weighted average price $104.0800
Shares sold 2026-08-10 at $104.64 2,913 shares Open-market sale at weighted average price $104.6400
Shares sold 2026-08-10 at $105.21 88 shares Open-market sale at weighted average price $105.2100
Indirect ESOP holdings 4,219 shares Indirect ownership held by ESOP as of 2026-08-07
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
Rule 10b5-1 regulatory
"Transactions were affirmed as made under a Rule 10b5-1 trading plan."
Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.
ESOP financial
"Indirect ownership type noted as by ESOP for 4,219 shares."
An Employee Stock Ownership Plan (ESOP) is a program that gives employees ownership shares in their company, often as part of their benefits package. It acts like a company-sponsored savings plan, allowing workers to have a stake in the company's success, which can boost motivation and loyalty. For investors, ESOPs can influence company decisions and stock value, making them an important aspect of corporate ownership and governance.

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Form 4 Insider Transactions: What Each Field Means →

FAQ

What insider transaction did GFF executive Robert F. Mehmel report?
Robert F. Mehmel, President and COO of Griffon Corp (GFF), reported selling a total of 22,567 common shares$100 per share

Over what dates did GFF’s Robert F. Mehmel sell shares?
Robert F. Mehmel reported selling Griffon common stock on August 7, 2026August 10, 2026

How many GFF shares did Robert F. Mehmel sell in this Form 4?
The Form 4 shows that Robert F. Mehmel sold 22,567 shares

At what prices were GFF shares sold by Robert F. Mehmel?
The reported weighted average sale prices range from about $103.32$108.24

Were Robert F. Mehmel’s GFF sales under a Rule 10b5-1 trading plan?
Yes. The filing indicates that the transactions were made pursuant to an affirmed Rule 10b5-1 trading plan

What Griffon (GFF) holdings does Robert F. Mehmel report after these transactions?
The Form 4 discloses an indirect position of 4,219 Griffon common shares
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).
X
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*
MEHMEL ROBERT F
(Last)(First)(Middle)
C/O GRIFFON CORPORATION
712 FIFTH AVENUE
(Street)
NEW YORK NEW YORK 10019
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
GRIFFON CORP [ GFF ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
President and COO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/07/2026		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 Stock08/07/2026S1,911D$106.6(1)746,928D
Common Stock08/07/2026S13,464D$107.43(2)733,464D
Common Stock08/07/2026S553D$108.09(3)732,911D
Common Stock08/10/2026S3,638D$104.08(4)729,273D
Common Stock08/10/2026S2,913D$104.64(5)726,360D
Common Stock08/10/2026S88D$105.21(6)726,272D
Common Stock4,219Iby ESOP
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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.22 to $106.99, inclusive. The reporting person undertakes to provide Griffon Corporation, any security holder of Griffon Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares disposed of at each price within the ranges set forth in footnotes (1), (2), (3), (4), (5) and (6) to this Form 4.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.00 to $107.96, inclusive.
3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.00 to $108.24, inclusive.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.32 to $104.31, inclusive.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.32 to $104.97, inclusive.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.00 to $105.63, inclusive.
Remarks:
/s/ Seth L. Kaplan, as attorney-in-fact08/11/2026
** 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