SEC Form 4 · accession 0001628280-26-054911

GRIFFON CORP · GFF

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Robert F Mehmel

Officer — President and COO

Period of report

Aug 5, 2026

Accepted (ET)

Aug 7, 2026 · 5:02 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0000050725

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1	Aug 5, 2026	S	617	$98.68	D	785,283	D
Common Stock^F2	Aug 5, 2026	S	2,283	$99.67	D	783,000	D
Common Stock^F3	Aug 5, 2026	S	3,527	$100.46	D	779,473	D
Common Stock^F4	Aug 5, 2026	S	2,790	$101.44	D	776,683	D
Common Stock^F5	Aug 5, 2026	S	5,341	$102.59	D	771,342	D
Common Stock^F6	Aug 5, 2026	S	5,434	$103.53	D	765,908	D
Common Stock^F7	Aug 5, 2026	S	2,217	$104.12	D	763,691	D
Common Stock^F8	Aug 6, 2026	S	158	$102.03	D	763,533	D
Common Stock^F9	Aug 6, 2026	S	211	$103.52	D	763,322	D
Common Stock^F10	Aug 6, 2026	S	5,476	$104.56	D	757,846	D
Common Stock^F11	Aug 6, 2026	S	6,933	$105.46	D	750,913	D
Common Stock^F12	Aug 6, 2026	S	2,074	$106.27	D	748,839	D
Common Stock	holding	—	—		—	4,219	I	by ESOP

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1The 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.
F10The 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.
F11The 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.
F12The 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.
F2The 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.
F3The 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.
F4The 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.
F5The 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.
F6The 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.
F7The 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.
F8The 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.
F9The 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.