GFF insider trading — Griffon Corp
Over the last 90 days, insiders at Griffon Corp (GFF) made 0 open-market purchases worth $0 and 2 open-market sales worth $688K, making them net sellers by $688K. The largest sale was by Sullivan Kevin F (Director), who sold 3,500 shares for $370K on Aug 13, 2026.
Updated Oct 16, 2026.
Recent GFF insider transactions
Every Form 4 filed by Griffon Corp officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 13, 2026 | Turnbull Cheryl L | Director | S · Sale | Direct | 3,000 | $106.12 | $318K | Form 4 |
| Aug 13, 2026 | Sullivan Kevin F | Director | S · Sale | Direct | 3,500 | $105.59 | $370K | Form 4 |
| Aug 11, 2026 | Mehmel Robert F | President and COO | S · Sale · 10b5-1 | Direct | 3,240 | $107.16 | $347K | Form 4 |
| Aug 10, 2026 | Mehmel Robert F | President and COO | S · Sale · 10b5-1 | Direct | 6,639 | $104.34 | $693K | Form 4 |
| Aug 7, 2026 | Mehmel Robert F | President and COO | S · Sale · 10b5-1 | Direct | 15,928 | $107.35 | $1.71M | Form 4 |
| Aug 7, 2026 | Harris Brian G | EVP, Chief Financial Officer | S · Sale · 10b5-1 | Direct | 5,267 | $107.11 | $564K | Form 4 |
| Aug 6, 2026 | Mehmel Robert F | President and COO | S · Sale · 10b5-1 | Direct | 14,852 | $105.18 | $1.56M | Form 4 |
| Aug 5, 2026 | Mehmel Robert F | President and COO | S · Sale · 10b5-1 | Direct | 22,209 | $102.08 | $2.27M | Form 4 |
| Aug 5, 2026 | Kramer Ronald J | Chairman of the Board and CEO | S · Sale · 10b5-1 | Direct | 100,000 | $102.42 | $10.24M | Form 4 |
| Aug 5, 2026 | Harris Brian G | EVP, Chief Financial Officer | S · Sale · 10b5-1 | Direct | 11,050 | $103.27 | $1.14M | Form 4 |
GFF insider trading FAQ
Are insiders buying GFF stock?
Not on the open market. In the last 90 days, Griffon Corp insiders made no open-market purchases, and 2 open-market sales totaling $688K. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading GFF?
Recent sellers: Sullivan Kevin F, Turnbull Cheryl L.
Where does GFF insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.