GFF insider buying and SEC filings, explained
Griffon Corp. · CIK 50725
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Company profile
- Exchanges
- NYSE
- Industry (SIC)
- Metal Doors, Sash, Frames, Moldings & Trim
- State of incorporation
- DE
- Fiscal year end
- Sep 30
- Former names
- GRIFFON CORP; INSTRUMENT SYSTEMS CORP /DE/
Insider activity in the last 12 months
Bought
$80K
Insiders who bought
1
Sold (not marked 10b5-1)
$14.0M
Planned sales (10b5-1)
$22.7M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Aug 13, 2026 | Sale | Cheryl L. Turnbull (Director) sold 3,000 shares at $106.12 ($318K). Holdings down 9% to 30,039 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 14, 2026 |
| Aug 13, 2026 | Sale | Kevin F Sullivan (Director) sold 3,500 shares at about $105.59 ($370K). Holdings down 8% to 40,602 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 14, 2026 |
| Aug 11, 2026 | Planned (10b5-1) | Robert F. Mehmel (President / COO) sold 3,240 shares at about $107.16 ($347K), marked as a 10b5-1 plan trade. Holdings down <1% to 723,032 shares. | SEC filing Filed Aug 13, 2026 |
| Aug 7–10, 2026 | Planned (10b5-1) | Robert F. Mehmel (President / COO) sold 22,567 shares between Aug 7 and Aug 10 at about $106.47 ($2.4M), marked as a 10b5-1 plan trade. Holdings down 3% to 726,272 shares. | SEC filing Filed Aug 11, 2026 |
| Aug 7, 2026 | Planned (10b5-1) | Brian G Harris (CFO) sold 5,267 shares at about $107.11 ($564K), marked as a 10b5-1 plan trade. Holdings down 4% to 128,649 shares. | SEC filing Filed Aug 11, 2026 |
| Aug 5, 2026 | Planned (10b5-1) | Brian G Harris (CFO) sold 11,050 shares at about $103.27 ($1.1M), marked as a 10b5-1 plan trade. Holdings down 8% to 133,916 shares. | SEC filing Filed Aug 7, 2026 |
| Aug 5, 2026 | Planned (10b5-1) | Ronald J. Kramer (CEO and Director) sold 100,000 shares at about $102.42 ($10.2M), marked as a 10b5-1 plan trade. Holdings down 6% to 1,684,297 shares. | SEC filing Filed Aug 7, 2026 |
| Aug 5–6, 2026 | Planned (10b5-1) | Robert F. Mehmel (President / COO) sold 37,061 shares between Aug 5 and Aug 6 at about $103.32 ($3.8M), marked as a 10b5-1 plan trade. Holdings down 5% to 748,839 shares. | SEC filing Filed Aug 7, 2026 |
| Jun 30, 2026 | Planned (10b5-1) | Robert F. Mehmel (President / COO) sold 4,166 shares at about $97.76 ($407K), marked as a 10b5-1 plan trade. Holdings down 1% to 785,900 shares. | SEC filing Filed Jul 2, 2026 |
| Jun 30, 2026 | Planned (10b5-1) | Brian G Harris (CFO) sold 6,183 shares at about $98.01 ($606K), marked as a 10b5-1 plan trade. Holdings down 4% to 144,966 shares. | SEC filing Filed Jul 2, 2026 |
| Jun 26, 2026 | Planned (10b5-1) | Robert F. Mehmel (President / COO) sold 286 shares at about $95.66 ($27K), marked as a 10b5-1 plan trade. Holdings down <1% to 790,066 shares. | SEC filing Filed Jun 30, 2026 |
| Jun 24–25, 2026 | Planned (10b5-1) | Robert F. Mehmel (President / COO) sold 12,599 shares between Jun 24 and Jun 25 at about $95.81 ($1.2M), marked as a 10b5-1 plan trade. Holdings down 2% to 790,352 shares. | SEC filing Filed Jun 26, 2026 |
| Jun 16–17, 2026 | Planned (10b5-1) | Robert F. Mehmel (President / COO) sold 3,565 shares between Jun 16 and Jun 17 at about $95.39 ($340K), marked as a 10b5-1 plan trade. Holdings down <1% to 802,951 shares. | SEC filing Filed Jun 18, 2026 |
| Jun 12–15, 2026 | Planned (10b5-1) | Robert F. Mehmel (President / COO) sold 8,773 shares between Jun 12 and Jun 15 at about $95.26 ($836K), marked as a 10b5-1 plan trade. Holdings down 1% to 806,516 shares. | SEC filing Filed Jun 16, 2026 |
| Jun 12, 2026 | Sale | Ronald J. Kramer (CEO and Director) sold 100,000 shares at about $94.92 ($9.5M). Holdings down 5% to 1,784,297 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 15, 2026 |
| Jun 11, 2026 | Planned (10b5-1) | Brian G Harris (CFO) sold 7,500 shares at about $95.03 ($713K), marked as a 10b5-1 plan trade. Holdings down 5% to 151,149 shares. | SEC filing Filed Jun 15, 2026 |
| Mar 5, 2026 | Purchase (code P) | Henry A. Alpert (Director) bought 1,000 shares at $79.99 ($80K), reported as a purchase (code P). Holdings up 1% to 71,479 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 9, 2026 |
| Feb 17, 2026 | Sale | W. Christopher Durborow (Vice President & CAO) sold 10,000 shares at about $91.97 ($920K). Holdings down 25% to 29,963 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 18, 2026 |
| Feb 13, 2026 | Sale | Louis J. Grabowsky (Director) sold 11,000 shares at $93.06 ($1.0M). Holdings down 21% to 41,670 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 17, 2026 |
| Feb 12, 2026 | Sale | Michelle L Taylor (Director) sold 1,650 shares at $92.56 ($153K). Holdings down 15% to 9,023 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 17, 2026 |
| Feb 9, 2026 | Sale | Seth L. Kaplan (Sr VP, Gen. Counsel and Secy) sold 15,000 shares at about $95.44 ($1.4M). Holdings down 11% to 119,747 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 11, 2026 |
| Feb 9, 2026 | Sale | James W. Sight (Director) sold 3,070 shares at about $96.15 ($295K). Holdings down 18% to 13,872 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 11, 2026 |
20 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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