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sellModerate cluster of 510b5-1 plan

Robert F Mehmel sold $3.8M of GFF

President and COO at GRIFFON CORP. 37,061 shares at an average of $103.32, traded Aug 5, 2026, filed Aug 7, 2026.

Warning score
40
Value
$3.8M
37,061 shares
Holdings after
748,839
-5% from before
From 52-week low
+55%
low $66.11, close $102.58
From 52-week high
0%
high $102.58, as of Aug 5, 2026

Score components

  • Role
    President
    +20
  • Trade size
    $3.8M at market
    +25
  • Share of holdings sold
    Sold 4.7% of holdings
    0
  • Cluster
    5 insiders selling within 14 days
    +15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

GFFOct 12, 2026 · close 89.74
Since filing Aug 7, 2026: -16.1%SPY +0.9% · excess -17.0%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001628280-26-054911, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 5, 2026SOpen-market sale
Common Stock10b5-1
-617$98.68$61k785,283Aug 7, 2026
Aug 5, 2026SOpen-market sale
Common Stock10b5-1
-2,283$99.67$228k783,000Aug 7, 2026
Aug 5, 2026SOpen-market sale
Common Stock10b5-1
-3,527$100.46$354k779,473Aug 7, 2026
Aug 5, 2026SOpen-market sale
Common Stock10b5-1
-2,790$101.44$283k776,683Aug 7, 2026
Aug 5, 2026SOpen-market sale
Common Stock10b5-1
-5,341$102.59$548k771,342Aug 7, 2026
Aug 5, 2026SOpen-market sale
Common Stock10b5-1
-5,434$103.53$563k765,908Aug 7, 2026
Aug 5, 2026SOpen-market sale
Common Stock10b5-1
-2,217$104.12$231k763,691Aug 7, 2026
Aug 6, 2026SOpen-market sale
Common Stock10b5-1
-158$102.03$16k763,533Aug 7, 2026
Aug 6, 2026SOpen-market sale
Common Stock10b5-1
-211$103.52$22k763,322Aug 7, 2026
Aug 6, 2026SOpen-market sale
Common Stock10b5-1
-5,476$104.56$573k757,846Aug 7, 2026
Aug 6, 2026SOpen-market sale
Common Stock10b5-1
-6,933$105.46$731k750,913Aug 7, 2026
Aug 6, 2026SOpen-market sale
Common Stock10b5-1
-2,074$106.27$220k748,839Aug 7, 2026

Related signals

Other insiders at GRIFFON CORP and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
45Moderate
GFFsell 5
GRIFFON CORP
Kevin F Sullivan
director
$370k
3,500 shares
-8%
44Moderate
GFFsell 5
GRIFFON CORP
Cheryl L Turnbull
director
$318k
3,000 shares
-9%
30Weak
GFFsell 510b5-1
GRIFFON CORP
Robert F Mehmel
President and COO
$347k
3,240 shares
-0%
36Weak
GFFsell 510b5-1
GRIFFON CORP
Brian G Harris
EVP, Chief Financial Officer
$564k
5,267 shares
-4%
40Moderate
GFFsell 510b5-1
GRIFFON CORP
Robert F Mehmel
President and COO
$2.4M
22,567 shares
-3%
45Moderate
GFFsell 510b5-1
GRIFFON CORP
Ronald J Kramer
Chairman of the Board and CEO
$10M
100,000 shares
-6%
42Moderate
GFFsell 510b5-1
GRIFFON CORP
Brian G Harris
EVP, Chief Financial Officer
$1.1M
11,050 shares
-8%
29Weak
GFFsell 210b5-1
GRIFFON CORP
Brian G Harris
EVP, Chief Financial Officer
$606k
6,183 shares
-4%
24Weak
GFFsell 210b5-1
GRIFFON CORP
Robert F Mehmel
President and COO
$407k
4,166 shares
-1%
20Weak
GFFsell 310b5-1
GRIFFON CORP
Robert F Mehmel
President and COO
$27k
286 shares
-0%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Robert F Mehmel sold $3.8M of GFF | InsiderTell