15 insiders reported 88 Form 4 transactions for GRIFFON CORP (GFF) over the past 18 months (most recent 2026-08-14). Recent activity: Sullivan Kevin F (Director) Sell 3,500 shares, TURNBULL CHERYL L (Director) Sell 3,000 shares, MEHMEL ROBERT F (President and COO) Sell 3,240 shares, Harris Brian G (EVP, Chief Financial Officer) Sell 5,267 shares, MEHMEL ROBERT F (President and COO) Sell 1,911 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-14 | Sullivan Kevin F | Director | Sell | 3,500 | $369,565 |
| 2026-08-14 | TURNBULL CHERYL L | Director | Sell | 3,000 | $318,360 |
| 2026-08-13 | MEHMEL ROBERT F | President and COO | Sell | 3,240 | $347,198 |
| 2026-08-11 | Harris Brian G | EVP, Chief Financial Officer | Sell | 5,267 | $564,148 |
| 2026-08-11 | MEHMEL ROBERT F | President and COO | Sell | 1,911 | $203,713 |
| 2026-08-11 | MEHMEL ROBERT F | President and COO | Sell | 13,464 | $1.4M |
| 2026-08-11 | MEHMEL ROBERT F | President and COO | Sell | 553 | $59,774 |
| 2026-08-11 | MEHMEL ROBERT F | President and COO | Sell | 3,638 | $378,643 |
| 2026-08-11 | MEHMEL ROBERT F | President and COO | Sell | 2,913 | $304,816 |
| 2026-08-11 | MEHMEL ROBERT F | President and COO | Sell | 88 | $9,258 |
| 2026-08-07 | Harris Brian G | EVP, Chief Financial Officer | Sell | 2,233 | $232,254 |
| 2026-08-07 | MEHMEL ROBERT F | President and COO | Sell | 617 | $60,886 |
| 2026-08-07 | Harris Brian G | EVP, Chief Financial Officer | Sell | 8,817 | $908,856 |
| 2026-08-07 | MEHMEL ROBERT F | President and COO | Sell | 158 | $16,121 |
| 2026-08-07 | MEHMEL ROBERT F | President and COO | Sell | 2,283 | $227,547 |
| 2026-08-07 | KRAMER RONALD J | Chairman of the Board and CEO | Sell | 17,322 | $1.8M |
| 2026-08-07 | MEHMEL ROBERT F | President and COO | Sell | 3,527 | $354,322 |
| 2026-08-07 | KRAMER RONALD J | Chairman of the Board and CEO | Sell | 45,240 | $4.6M |
| 2026-08-07 | MEHMEL ROBERT F | President and COO | Sell | 2,790 | $283,018 |
| 2026-08-07 | KRAMER RONALD J | Chairman of the Board and CEO | Sell | 12,916 | $1.3M |
| 2026-08-07 | MEHMEL ROBERT F | President and COO | Sell | 5,341 | $547,933 |
| 2026-08-07 | KRAMER RONALD J | Chairman of the Board and CEO | Sell | 8,120 | $846,672 |
| 2026-08-07 | MEHMEL ROBERT F | President and COO | Sell | 5,434 | $562,582 |
| 2026-08-07 | MEHMEL ROBERT F | President and COO | Sell | 2,217 | $230,834 |
| 2026-08-07 | KRAMER RONALD J | Chairman of the Board and CEO | Sell | 16,402 | $1.7M |
Source: SEC Form 4 filings · as of 2026-08-14