Griffon Corporation (GFF) Insider Trading

Over the last 3 months, GFF insiders made 0 open-market buys and 47 sales, a net sale of -$32.8M (SEC Form 4). Over the last 6 months, 251 institutions increased and 240 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
47
Net (3m)
-$32.8M
Insider trades by month Buys Sells
Feb
Feb
Mar
Jun
Jul
Aug
Context3-month price +14.5%Institutions accumulating (13F)
DateInsiderTypeSharesPrice
Aug 14, 2026Sullivan Kevin FdirectorSell3,500$105.59
Aug 14, 2026TURNBULL CHERYL LdirectorSell3,000$106.12
Aug 13, 2026MEHMEL ROBERT Fofficer: President and COOSell3,240$107.16
Aug 11, 2026MEHMEL ROBERT Fofficer: President and COOSell2,913$104.64
Aug 11, 2026MEHMEL ROBERT Fofficer: President and COOSell13,464$107.43
Aug 11, 2026MEHMEL ROBERT Fofficer: President and COOSell1,911$106.60
Aug 11, 2026MEHMEL ROBERT Fofficer: President and COOSell3,638$104.08
Aug 11, 2026MEHMEL ROBERT Fofficer: President and COOSell553$108.09
Aug 11, 2026Harris Brian Gofficer: EVP, Chief Financial OfficerSell5,267$107.11
Aug 11, 2026MEHMEL ROBERT Fofficer: President and COOSell88$105.21
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell5,476$104.56
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell2,074$106.27
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell3,527$100.46
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell617$98.68
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell2,283$99.67
Aug 7, 2026KRAMER RONALD Jdirector, officer: Chairman of the Board and CEOSell17,322$101.58
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell158$102.03
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell211$103.52
Aug 7, 2026Harris Brian Gofficer: EVP, Chief Financial OfficerSell2,233$104.01
Aug 7, 2026KRAMER RONALD Jdirector, officer: Chairman of the Board and CEOSell8,120$104.27
Aug 7, 2026Harris Brian Gofficer: EVP, Chief Financial OfficerSell8,817$103.08
Aug 7, 2026KRAMER RONALD Jdirector, officer: Chairman of the Board and CEOSell12,916$100.44
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell6,933$105.46
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell5,341$102.59
Aug 7, 2026KRAMER RONALD Jdirector, officer: Chairman of the Board and CEOSell16,402$103.37
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell2,790$101.44
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell2,217$104.12
Aug 7, 2026KRAMER RONALD Jdirector, officer: Chairman of the Board and CEOSell45,240$102.63
Aug 7, 2026MEHMEL ROBERT Fofficer: President and COOSell5,434$103.53
Jul 2, 2026Harris Brian Gofficer: EVP, Chief Financial OfficerSell6,183$98.01

Source: GFF SEC Form 4 filings, latest Aug 14, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their GFF positions over the last 6 months (SEC Form 13F).

Increased
251
New positions
108
Reduced
240
Sold out
43
Largest moves
InstitutionActionSharesFiled
BlackRock, Inc.Increased6.1MAug 7, 2026
BLACKROCK, INC.Increased6.0MMay 13, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position3.7MMay 8, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCReduced3.7MAug 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position1.9MMay 15, 2026
VANGUARD CAPITAL MANAGEMENT LLCReduced1.9MAug 13, 2026
VOSS CAPITAL, LLCIncreased1.8MMay 15, 2026
FMR LLCIncreased1.6MAug 13, 2026
STATE STREET CORPIncreased1.6MAug 7, 2026
Voss Capital, LPReduced1.5MAug 14, 2026
STATE STREET CORPReduced1.5MMay 15, 2026
FULLER & THALER ASSET MANAGEMENT, INC.Increased1.1MAug 12, 2026
DIMENSIONAL FUND ADVISORS LPReduced1.0MMay 7, 2026
DIMENSIONAL FUND ADVISORS LPReduced1.0MAug 11, 2026
FULLER & THALER ASSET MANAGEMENT, INC.Reduced1.0MMay 14, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.