Griffon Corporation (GFF) Insider Trading
Over the last 3 months, GFF insiders made 0 open-market buys and 5 sales, a net sale of -$11.0M (SEC Form 4). Over the last 6 months, 269 institutions increased and 227 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
5
Net (3m)
-$11.0M
Insider trades by month Buys Sells
Nov
Dec
Feb
Feb
Mar
Jun
Context3-month price +28.8%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 16, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 5,501 | $95.18 |
| Jun 16, 2026 | MEHMEL ROBERT Fofficer: President and COO | Sell | 3,272 | $95.40 |
| Jun 15, 2026 | KRAMER RONALD Jdirector, officer: Chairman of the Board and CEO | Sell | 48,971 | $94.62 |
| Jun 15, 2026 | Harris Brian Gofficer: EVP, Chief Financial Officer | Sell | 7,500 | $95.03 |
| Jun 15, 2026 | KRAMER RONALD Jdirector, officer: Chairman of the Board and CEO | Sell | 51,029 | $95.21 |
| Mar 9, 2026 | ALPERT HENRY Adirector | Buy | 1,000 | $79.99 |
| Feb 20, 2026 | SIGHT JAMES Wdirector | Grant | 1,340 | — |
| Feb 20, 2026 | Johnson Lacy M.director | Grant | 1,340 | — |
| Feb 20, 2026 | Coben Jerome Ldirector | Grant | 1,340 | — |
| Feb 20, 2026 | Diao H.C. Charlesdirector | Grant | 1,340 | — |
| Feb 20, 2026 | TURNBULL CHERYL Ldirector | Grant | 1,340 | — |
| Feb 20, 2026 | ALPERT HENRY Adirector | Grant | 1,340 | — |
| Feb 20, 2026 | Grabowsky Louis J.director | Grant | 1,340 | — |
| Feb 20, 2026 | Hegedus Samantadirector | Grant | 1,340 | — |
| Feb 20, 2026 | Taylor Michelle Ldirector | Grant | 1,340 | — |
| Feb 20, 2026 | Sullivan Kevin Fdirector | Grant | 1,340 | — |
| Feb 18, 2026 | Durborow W. Christopherofficer: Vice President & CAO | Sell | 10,000 | $91.97 |
| Feb 17, 2026 | Taylor Michelle Ldirector | Sell | 1,650 | $92.56 |
| Feb 17, 2026 | Grabowsky Louis J.director | Sell | 11,000 | $93.06 |
| Feb 11, 2026 | SIGHT JAMES Wdirector | Sell | 3,070 | $96.15 |
| Feb 11, 2026 | Kaplan Seth L.officer: Sr VP, Gen. Counsel and Secy | Sell | 400 | $97.46 |
| Feb 11, 2026 | Kaplan Seth L.officer: Sr VP, Gen. Counsel and Secy | Sell | 3,240 | $96.67 |
| Feb 11, 2026 | Kaplan Seth L.officer: Sr VP, Gen. Counsel and Secy | Sell | 4,274 | $95.61 |
| Feb 11, 2026 | Kaplan Seth L.officer: Sr VP, Gen. Counsel and Secy | Sell | 7,086 | $94.67 |
| Dec 2, 2025 | KRAMER RONALD Jdirector, officer: Chairman of the Board and CEO | Tax | 74,079 | $75.00 |
| Dec 2, 2025 | Harris Brian Gofficer: EVP, Chief Financial Officer | Tax | 7,610 | $75.00 |
| Dec 2, 2025 | MEHMEL ROBERT Fofficer: President and COO | Tax | 26,928 | $75.00 |
| Dec 2, 2025 | Kaplan Seth L.officer: Sr VP, Gen. Counsel and Secy | Tax | 8,921 | $75.00 |
| Dec 2, 2025 | Durborow W. Christopherofficer: Vice President & CAO | Tax | 4,343 | $75.00 |
| Nov 19, 2025 | MEHMEL ROBERT Fofficer: President and COO | Grant | 68,432 | — |
Source: GFF SEC Form 4 filings, latest Jun 16, 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
269
New positions
90
Reduced
227
Sold out
67
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Increased | 6.0M | May 13, 2026 |
| BLACKROCK, INC. | Increased | 5.9M | Feb 12, 2026 |
| VANGUARD GROUP INC | Reduced | 5.9M | Jan 29, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 3.7M | May 8, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 1.9M | May 15, 2026 |
| VOSS CAPITAL, LLC | Increased | 1.8M | May 15, 2026 |
| VOSS CAPITAL, LLC | Increased | 1.8M | Feb 13, 2026 |
| STATE STREET CORP | Increased | 1.5M | Feb 13, 2026 |
| STATE STREET CORP | Reduced | 1.5M | May 15, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 1.0M | Feb 12, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 1.0M | May 7, 2026 |
| FULLER & THALER ASSET MANAGEMENT, INC. | Increased | 1.0M | Feb 18, 2026 |
| FULLER & THALER ASSET MANAGEMENT, INC. | Reduced | 1.0M | May 14, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 924K | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 922K | Feb 9, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.