As of the latest Form 4 filed Jul 2, 2026.
What Griffon Corporation insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 19 most recent filings for GFF.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-02 | 2026-06-30 | MEHMEL ROBERT F President and COO | SSale | −4.17K | $97.76 | $407K | Yes (planned) | Form 4 ↗ |
| 2026-07-02 | 2026-06-30 | Harris Brian G EVP, Chief Financial Officer | SSale | −6.18K | $98.01 | $606K | Yes (planned) | Form 4 ↗ |
| 2026-06-30 | 2026-06-26 | MEHMEL ROBERT F President and COO | SSale | −4.00 | $97.50 | $390.00 | Yes (planned) | Form 4 ↗ |
| 2026-06-30 | 2026-06-26 | MEHMEL ROBERT F, President and COO | SSale | −52.00 | $96.14 | $5.00K | Yes (planned) | Form 4 ↗ |
| 2026-06-30 | 2026-06-26 | MEHMEL ROBERT F, President and COO | SSale | −230.00 | $95.52 | $22.0K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-25 | MEHMEL ROBERT F President and COO | SSale | −1.19K | $97.27 | $116K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-25 | MEHMEL ROBERT F, President and COO | SSale | −1.53K | $96.41 | $148K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-25 | MEHMEL ROBERT F, President and COO | SSale | −5.15K | $95.62 | $492K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-24 | MEHMEL ROBERT F, President and COO | SSale | −100.00 | $96.03 | $9.60K | Yes (planned) | Form 4 ↗ |
| 2026-06-26 | 2026-06-24 | MEHMEL ROBERT F, President and COO | SSale | −4.63K | $95.45 | $442K | Yes (planned) | Form 4 ↗ |
| 2026-06-18 | 2026-06-17 | MEHMEL ROBERT F President and COO | SSale | −547.00 | $95.37 | $52.2K | Yes (planned) | Form 4 ↗ |
| 2026-06-18 | 2026-06-16 | MEHMEL ROBERT F, President and COO | SSale | −97.00 | $96.25 | $9.34K | Yes (planned) | Form 4 ↗ |
| 2026-06-18 | 2026-06-16 | MEHMEL ROBERT F, President and COO | SSale | −2.92K | $95.36 | $279K | Yes (planned) | Form 4 ↗ |
| 2026-06-16 | 2026-06-15 | MEHMEL ROBERT F President and COO | SSale | −3.27K | $95.40 | $312K | Yes (planned) | Form 4 ↗ |
| 2026-06-16 | 2026-06-12 | MEHMEL ROBERT F, President and COO | SSale | −5.50K | $95.18 | $524K | Yes (planned) | Form 4 ↗ |
| 2026-06-15 | 2026-06-12 | KRAMER RONALD J Chairman of the Board and CEO | SSale | −49.0K | $94.62 | $4.63M | No | Form 4 ↗ |
| 2026-06-15 | 2026-06-12 | KRAMER RONALD J, Chairman of the Board and CEO | SSale | −51.0K | $95.21 | $4.86M | No | Form 4 ↗ |
| 2026-06-15 | 2026-06-11 | Harris Brian G EVP, Chief Financial Officer | SSale | −7.50K | $95.03 | $713K | Yes (planned) | Form 4 ↗ |
| 2026-03-09 | 2026-03-05 | ALPERT HENRY A Director | PPurchase | +1.00K | $79.99 | $80.0K | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also GFF’s full analysis or the market-wide insider trading feed. The tabs above jump to GFF’s other SEC data.
Source: SEC Form 4 filings for GFF, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
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