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)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 14, 2026 | Sullivan Kevin Fdirector | Sell | 3,500 | $105.59 |
| Aug 14, 2026 | TURNBULL CHERYL Ldirector | Sell | 3,000 | $106.12 |
| Aug 13, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 3,240 | $107.16 |
| Aug 11, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 2,913 | $104.64 |
| Aug 11, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 13,464 | $107.43 |
| Aug 11, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 1,911 | $106.60 |
| Aug 11, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 3,638 | $104.08 |
| Aug 11, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 553 | $108.09 |
| Aug 11, 2026 | Harris Brian Gofficer: EVP, Chief Financial Officer | Sell | 5,267 | $107.11 |
| Aug 11, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 88 | $105.21 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 5,476 | $104.56 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 2,074 | $106.27 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 3,527 | $100.46 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 617 | $98.68 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 2,283 | $99.67 |
| Aug 7, 2026 | KRAMER RONALD Jdirector, officer: Chairman of the Board and CEO | Sell | 17,322 | $101.58 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 158 | $102.03 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 211 | $103.52 |
| Aug 7, 2026 | Harris Brian Gofficer: EVP, Chief Financial Officer | Sell | 2,233 | $104.01 |
| Aug 7, 2026 | KRAMER RONALD Jdirector, officer: Chairman of the Board and CEO | Sell | 8,120 | $104.27 |
| Aug 7, 2026 | Harris Brian Gofficer: EVP, Chief Financial Officer | Sell | 8,817 | $103.08 |
| Aug 7, 2026 | KRAMER RONALD Jdirector, officer: Chairman of the Board and CEO | Sell | 12,916 | $100.44 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 6,933 | $105.46 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 5,341 | $102.59 |
| Aug 7, 2026 | KRAMER RONALD Jdirector, officer: Chairman of the Board and CEO | Sell | 16,402 | $103.37 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 2,790 | $101.44 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 2,217 | $104.12 |
| Aug 7, 2026 | KRAMER RONALD Jdirector, officer: Chairman of the Board and CEO | Sell | 45,240 | $102.63 |
| Aug 7, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 5,434 | $103.53 |
| Jul 2, 2026 | Harris Brian Gofficer: EVP, Chief Financial Officer | Sell | 6,183 | $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
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BlackRock, Inc. | Increased | 6.1M | Aug 7, 2026 |
| BLACKROCK, INC. | Increased | 6.0M | May 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 3.7M | May 8, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 3.7M | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 1.9M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 1.9M | Aug 13, 2026 |
| VOSS CAPITAL, LLC | Increased | 1.8M | May 15, 2026 |
| FMR LLC | Increased | 1.6M | Aug 13, 2026 |
| STATE STREET CORP | Increased | 1.6M | Aug 7, 2026 |
| Voss Capital, LP | Reduced | 1.5M | Aug 14, 2026 |
| STATE STREET CORP | Reduced | 1.5M | May 15, 2026 |
| FULLER & THALER ASSET MANAGEMENT, INC. | Increased | 1.1M | Aug 12, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 1.0M | May 7, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 1.0M | Aug 11, 2026 |
| FULLER & THALER ASSET MANAGEMENT, INC. | Reduced | 1.0M | May 14, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.