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  4. [Form 4] GRIFFON CORP Insider Trading Activity

Griffon Corp (GFF) COO sells 37,061 shares in planned stock trades

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

Rhea-AI Filing Summary

Griffon Corp President and COO Robert F. Mehmel reported open‑market sales of 37,061 shares of common stock on August 5–6, 2026. The trades were executed at weighted‑average prices between about $98.68 and $106.27 per share under a Rule 10b5‑1 trading plan. He continues to hold 4,219 shares indirectly through an ESOP.

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Insider MEHMEL ROBERT F
Role President and COO
Sold 37,061 shs ($3.83M)
Type Security Shares Price Value
Sale Common Stock F8 158 $102.03 $16K
Sale Common Stock F9 211 $103.52 $22K
Sale Common Stock F10 5,476 $104.56 $573K
Sale Common Stock F11 6,933 $105.46 $731K
Sale Common Stock F12 2,074 $106.27 $220K
Sale Common Stock F1 617 $98.68 $61K
Sale Common Stock F2 2,283 $99.67 $228K
Sale Common Stock F3 3,527 $100.46 $354K
Sale Common Stock F4 2,790 $101.44 $283K
Sale Common Stock F5 5,341 $102.59 $548K
Sale Common Stock F6 5,434 $103.53 $563K
Sale Common Stock F7 2,217 $104.12 $231K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 748,839 shares (Direct); Common Stock — 4,219 shares (Indirect, by ESOP)
Footnotes (12)
  1. F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.19 to $98.96, 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), (6), (7), (8), (9), (10), (11), and (12) 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 $99.10 to $99.98, 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 $100.02 to $100.96, 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 $101.03 to $101.80, 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 $102.00 to $102.98, 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 $103.01 to $104.00, inclusive.
  7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.00 to $104.48, inclusive.
  8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $101.86 to $102.40, inclusive.
  9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.90 to $103.89, inclusive.
  10. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.95 to $104.93, inclusive.
  11. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.95 to $105.93, inclusive.
  12. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.97 to $106.70, inclusive.
Common shares sold 37,061 shares Aggregate Griffon Corp common shares sold by Robert F. Mehmel on August 5–6, 2026
Lowest weighted-average sale price $98.68 per share Weighted-average price for a sale of 617 shares on August 5, 2026
Highest weighted-average sale price $106.27 per share Weighted-average price for a sale of 2,074 shares on August 6, 2026
Indirect ESOP holdings 4,219 shares Shares held indirectly "by ESOP" after the reported transactions
Number of sale transactions 12 transactions Count of non-derivative common stock sale entries reported in the Form 4
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.
open market financial
"Transaction code description: Sale in open market or private transaction"
An open market is a system where buying and selling of goods, services, or financial assets happen freely without restrictions or special controls. For investors, it means they can trade assets easily and quickly, which helps determine fair prices based on supply and demand. This environment encourages transparency and competition, making it easier to buy or sell with confidence.
ESOP financial
"Indirect ownership listed as "by ESOP" in the holdings entry"
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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FAQ

What insider stock sale did GFF report for Robert F. Mehmel?
Griffon Corp reported that President and COO Robert F. Mehmel sold 37,061 shares of common stock in open‑market transactions on August 5–6, 2026 at weighted‑average prices between roughly $98.68 and $106.27 per share under a Rule 10b5‑1 trading plan.

How many GFF shares did Robert F. Mehmel sell, and over what dates?
37,061 Griffon Corp (GFF) common shares were sold by Robert F. Mehmel in a series of open‑market transactions spanning two days, specifically on August 5 and 6, 2026, according to the Form 4 insider trading report data.

At what prices were Robert F. Mehmel’s GFF share sales executed?
The Form 4 reports weighted‑average sale prices for each transaction, with column‑4 prices ranging from about $98.68 to $106.27 per share. Footnotes explain that each reported price reflects multiple trades within specific intraday price ranges disclosed for every transaction.

Were Robert F. Mehmel’s GFF sales made under a Rule 10b5-1 plan?
Yes. The filing’s Rule 10b5‑1 checkbox is marked, indicating the reported transactions were carried out under a pre‑arranged Rule 10b5‑1 trading plan. Such plans allow insiders to schedule trades in advance, independent of later material non‑public information.

How many GFF shares does Robert F. Mehmel still hold through the ESOP?
After the reported transactions, the holdings table shows 4,219 Griffon Corp shares held indirectly, with ownership described as "by ESOP". This reflects his reported position in the company’s employee stock ownership plan at the time of the filing.

Did the latest GFF Form 4 include any option exercises or derivative trades?
No. The summary data show 0 derivative transactions and 0 option exercises, with all reported activity involving non‑derivative common stock sales. The derivative positions section is empty, indicating no new derivative movements were disclosed in this particular Form 4.
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)
08/05/2026		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 Stock08/05/2026S617D$98.68(1)785,283D
Common Stock08/05/2026S2,283D$99.67(2)783,000D
Common Stock08/05/2026S3,527D$100.46(3)779,473D
Common Stock08/05/2026S2,790D$101.44(4)776,683D
Common Stock08/05/2026S5,341D$102.59(5)771,342D
Common Stock08/05/2026S5,434D$103.53(6)765,908D
Common Stock08/05/2026S2,217D$104.12(7)763,691D
Common Stock08/06/2026S158D$102.03(8)763,533D
Common Stock08/06/2026S211D$103.52(9)763,322D
Common Stock08/06/2026S5,476D$104.56(10)757,846D
Common Stock08/06/2026S6,933D$105.46(11)750,913D
Common Stock08/06/2026S2,074D$106.27(12)748,839D
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 $98.19 to $98.96, 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), (6), (7), (8), (9), (10), (11), and (12) 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 $99.10 to $99.98, inclusive.
3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.02 to $100.96, inclusive.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $101.03 to $101.80, inclusive.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.00 to $102.98, inclusive.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.01 to $104.00, inclusive.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.00 to $104.48, inclusive.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $101.86 to $102.40, inclusive.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.90 to $103.89, inclusive.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.95 to $104.93, inclusive.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.95 to $105.93, inclusive.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.97 to $106.70, inclusive.
Remarks:
/s/ Seth L. Kaplan, as attorney-in-fact08/07/2026
** 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