Griffon COO Sells $1.21M Stock Near 52-Week High: Inside the 10b5-1 Sales

For investors tracking insider sentiment, the optics of a COO selling $1.21 million in stock just as shares flirt with $97—near the 52-week high—demand a closer look. While these sales were pre-arranged under SEC Rule 10b5-1, the timing against a backdrop of a 742 PE ratio and a 31% revenue drop raises questions about valuation risk.

Griffon Corporation COO Robert Mehmel executed two significant insider stock sales on consecutive days in late June 2026, unloading a combined 12,599 shares worth approximately $1.21 million under a pre-arranged Rule 10b5-1 trading plan. On June 24, he sold 4,726 shares at an average price of $95.46, trimming his direct holdings by 0.59% and pocketing $451,144. The very next day, he offloaded another 7,873 shares at $96.02, a 0.99% reduction netting him $755,965. Following these transactions, Mehmel retains 790,352 shares valued at roughly $75.9 million, ensuring his financial alignment remains substantial. The sales were disclosed in SEC filings and executed automatically under a 10b5-1 plan adopted when he was not in possession of material non-public information, insulating the trades from accusations of opportunistic timing.

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The most recent quarterly report (released May 7) showed an EPS beat of $1.05 versus consensus $0.99, but revenue of $421.86 million was down 31% year-over-year, and earnings per share declined from $1.23 a year earlier.

These insider sales occur against a backdrop of mixed financial signals for Griffon, a conglomerate with operations spanning home and building products, consumer products, and defense electronics. GFF shares were trading at $96.56 on Friday, just shy of the 52-week high of $97.70 and well above the 52-week low of $65.01. The stock’s momentum—up 0.7% on the day—reflects a 50-day moving average of $88.87 and a 200-day average of $82.80, signaling a bullish trend. Yet the company’s fundamentals paint a more nuanced picture. The most recent quarterly report (released May 7) showed an EPS beat of $1.05 versus consensus $0.99, but revenue of $421.86 million was down 31% year-over-year, and earnings per share declined from $1.23 a year earlier. The market cap stands at $4.43 billion, but the trailing P/E ratio of 742.86 is extraordinarily high, suggesting either expected near-term earnings growth or a market overvaluation. Return on equity of 298.42% appears stellar but is likely inflated by high leverage, as evidenced by a debt-to-equity ratio of 14.77.