GFF Griffon Corporation
Griffon Corporation (GFF) Insider Activity
What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.
How much of that selling was preplanned? 0% planned / 100% discretionary
Largest single sale: $4.9M.
Where they traded
Last open-market purchase: March 5, 2026 , by ALPERT HENRY A .
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| Sullivan Kevin F | Director | Sell | 3,500 | $105.59 | $369.6K | 40,602 −7.9% of holding | |
| TURNBULL CHERYL L | Director | Sell | 3,000 | $106.12 | $318.4K | 30,039 −9.1% of holding | |
| MEHMEL ROBERT F | President and COO | Sell | 3,240 | $107.16 | $347.2K | 723,032 −0.4% of holding | |
| MEHMEL ROBERT F 3 fills | President and COO | Sell | 6,639 | $104.34 | $692.7K | 729,273 −0.9% of holding | |
| MEHMEL ROBERT F 3 fills | President and COO | Sell | 15,928 | $107.35 | $1.7M | 746,928 −2.1% of holding | |
| Harris Brian G | EVP, Chief Financial Officer | Sell | 5,267 | $107.11 | $564.1K | 128,649 −3.9% of holding | |
| MEHMEL ROBERT F 5 fills | President and COO | Sell | 14,852 | $105.18 | $1.6M | 763,533 −1.9% of holding | |
| KRAMER RONALD J 5 fills | Chairman of the Board and CEO | Sell | 100,000 | $102.42 | $10.2M | 1,771,381 −5.3% of holding | |
| MEHMEL ROBERT F 7 fills | President and COO | Sell | 22,209 | $102.08 | $2.3M | 785,283 −2.8% of holding | |
| Harris Brian G 2 fills | EVP, Chief Financial Officer | Sell | 11,050 | $103.27 | $1.1M | 136,149 −7.5% of holding | |
| Harris Brian G | EVP, Chief Financial Officer | Sell | 6,183 | $98.01 | $606.0K | 144,966 −4.1% of holding | |
| MEHMEL ROBERT F | President and COO | Sell | 4,166 | $97.76 | $407.3K | 785,900 −0.5% of holding | |
| MEHMEL ROBERT F 3 fills | President and COO | Sell | 286 | $95.66 | $27.4K | 790,122 −0% of holding | |
| MEHMEL ROBERT F 3 fills | President and COO | Sell | 7,873 | $96.02 | $756.0K | 793,076 −1% of holding | |
| MEHMEL ROBERT F 2 fills | President and COO | Sell | 4,726 | $95.46 | $451.2K | 798,325 −0.6% of holding | |
| MEHMEL ROBERT F | President and COO | Sell | 547 | $95.37 | $52.2K | 802,951 −0.1% of holding | |
| MEHMEL ROBERT F 2 fills | President and COO | Sell | 3,018 | $95.39 | $287.9K | 803,595 −0.4% of holding | |
| MEHMEL ROBERT F | President and COO | Sell | 3,272 | $95.40 | $312.1K | 806,516 −0.4% of holding | |
| KRAMER RONALD J 2 fills | Chairman of the Board and CEO | Sell | 100,000 | $94.92 | $9.5M | 1,833,268 −5.2% of holding | |
| MEHMEL ROBERT F | President and COO | Sell | 5,501 | $95.18 | $523.6K | 809,788 −0.7% of holding | |
| Harris Brian G | EVP, Chief Financial Officer | Sell | 7,500 | $95.03 | $712.7K | 151,149 −4.7% of holding |
Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.