Griffon COO Robert F. Mehmel sells 6,918 shares

Q: How many GFF shares did Robert F. Mehmel sell?

On November 5, 2026, Robert F. Mehmel sold 6,918 shares at a weighted-average price of $107.56 and 825 shares at $108.13. Both sales were made under a Rule 10b5-1 plan.

For the two lots, the reported price ranges were $107.00–$107.99 and $108.00–$108.32, inclusive.

Available on EDGAR 11/06/2026 - 04:32 PM EST Accepted by SEC EDGAR 11/06/2026 - 04:31 PM EST

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Rhea-AI Filing Summary

Griffon Corp. (GFF) President and COO Robert F. Mehmel sold 6,918 shares of common stock at a weighted-average price of $107.56 and another 825 shares at $108.13 on November 5, 2026. Both sales were made under a Rule 10b5-1 plan. A separate holding entry lists 4,219 common shares held indirectly by the ESOP as of November 5, 2026.

Insider Trade Summary 10b5-1

Net Seller: 7,743 shares

Net Sell 2 txns

Insider MEHMEL ROBERT F

Role President and COO

Sold 7,743 shs ($833K)

Type	Security	Shares	Price	Value
Sale	Common Stock ^F1	6,918	$107.56	$744K
Sale	Common Stock ^F2	825	$108.13	$89K
Holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 715,289 shares (Direct); Common Stock — 4,219 shares (Indirect, by ESOP)

Footnotes (2)

F1. 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 $107.99, 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) and (2) to this Form 4.
F2. 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 $108.32, inclusive.

Key Figures

Common shares sold: 6,918 shares Weighted-average sale price: $107.56 per share Reported sale price range: $107.00–$107.99 per share +4 more

7 metrics

Common shares sold 6,918 shares November 5, 2026

Weighted-average sale price $107.56 per share 6,918-share sale on November 5, 2026

Reported sale price range $107.00–$107.99 per share 6,918-share sale; inclusive range

Common shares sold 825 shares November 5, 2026

Weighted-average sale price $108.13 per share 825-share sale on November 5, 2026

Reported sale price range $108.00–$108.32 per share 825-share sale; inclusive range

Common shares held indirectly by the ESOP 4,219 shares November 5, 2026

Key Terms

weighted average price, Rule 10b5-1 plan, non-derivative

3 terms

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 plan regulatory

"Both sales were made under a Rule 10b5-1 plan."

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

non-derivative technical

"Common Stock; non-derivative transaction"

FAQ

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How many GFF shares did Robert F. Mehmel sell?

On November 5, 2026, Robert F. Mehmel sold 6,918 shares at a weighted-average price of $107.56 and 825 shares at $108.13. Both sales were made under a Rule 10b5-1 plan.

What price ranges applied to Robert F. Mehmel’s GFF sales?

The 6,918-share sale was reported across multiple transactions priced from $107.00 to $107.99, inclusive. The 825-share sale was reported across multiple transactions priced from $108.00 to $108.32, inclusive.

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

Form 4 Insider Transactions: What Each Field Means →

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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^*

MEHMEL ROBERT F

(Last)

(First)

(Middle)

C/O GRIFFON CORPORATION

712 FIFTH AVENUE

(Street)

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)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	President and COO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/05/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	11/05/2026		S		6,918	D	$107.56⁽¹⁾	716,114	D
Common Stock	11/05/2026		S		825	D	$108.13⁽²⁾	715,289	D
Common Stock								4,219	I	by 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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 $107.00 to $107.99, 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) and (2) 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 $108.00 to $108.32, inclusive.

Remarks:

	/s/ Seth L. Kaplan, as attorney-in-fact	11/06/2026
	** 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)

Source: View Original Filing on SEC EDGAR