GRIFFON (GFF) stock: insider trades, news & valuation
Net selling
Close · Oct 9, 2026
$90.59
-1.7% on the day
+21.9% over 12 months
52-week range $66.11 – $106.98
Share price and insider trades
GFF closeInsider buyInsider sale
Bought, 12 months$80K
Sold, 12 months$36.7M
Insiders buying1
Insiders selling10
GRIFFON insider trading at a glance (Oct 9, 2026): in the past 12 months, 1 insider bought $80K and 10 sold $36.7M of GFF stock on the open market.
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GFF insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | — | 0 | $19.2M | 29 |
| Q2 2026 | — | 0 | $13.6M | 18 |
| Q1 2026 | $80K | 1 | $3.8M | 8 |
Valuation, profit and volume
P/E (trailing)n/aSector median —
Market value—
Profit margin—Revenue growth —
Volume vs. 50-day1.0×Last 5 sessions
Insiders' paper profit+$11KOn all tracked purchases +13.3%
Summary
Over the past 12 months, 1 GRIFFON CORP insider reported open-market purchases totaling $80K, while 10 insiders reported sales totaling $36.7M. 43 of 55 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Aug 14SEC | Kevin F SullivanDirector | Sell | 3,50040,602 held (−8%) | $105.59 | $370K | -14.2% | — |
| Aug 14SEC | Cheryl L TurnbullDirector | Sell | 3,00030,039 held (−9%) | $106.12 | $318K | -14.6% | — |
| Aug 13SEC | Robert F MehmelCOO, President | Sell Plan | 3,240723,032 held (−0%) | $107.16 | $347K | -15.5% | — |
| Aug 11SEC | Robert F MehmelCOO, President | Sell Plan | 13,464733,464 held (−2%) | $107.43 | $1.4M | -15.7% | — |
| Aug 11SEC | Brian G HarrisCFO | Sell Plan | 5,267128,649 held (−4%) | $107.11 | $564K | -15.4% | — |
| Aug 11SEC | Robert F MehmelCOO, President | Sell Plan | 3,638729,273 held (−0%) | $104.08 | $379K | -13.0% | — |
| Aug 11SEC | Robert F MehmelCOO, President | Sell Plan | 2,913726,360 held (−0%) | $104.64 | $305K | -13.4% | — |
| Aug 11SEC | Robert F MehmelCOO, President | Sell Plan | 1,911746,928 held (−0%) | $106.60 | $204K | -15.0% | — |
| Aug 11SEC | Robert F MehmelCOO, President | Sell Plan | 553732,911 held (−0%) | $108.09 | $60K | -16.2% | — |
| Aug 11SEC | Robert F MehmelCOO, President | Sell Plan | 88726,272 held (−0%) | $105.21 | $9K | -13.9% | — |
| Aug 7SEC | Ronald J KramerCEO, Chair | Sell Plan | 45,2401,708,819 held (−3%) | $102.63 | $4.6M | -11.7% | — |
| Aug 7SEC | Ronald J KramerCEO, Chair | Sell Plan | 17,3221,754,059 held (−1%) | $101.58 | $1.8M | -10.8% | — |
| Aug 7SEC | Ronald J KramerCEO, Chair | Sell Plan | 16,4021,692,417 held (−1%) | $103.37 | $1.7M | -12.4% | — |
| Aug 7SEC | Ronald J KramerCEO, Chair | Sell Plan | 12,9161,771,381 held (−1%) | $100.44 | $1.3M | -9.8% | — |
| Aug 7SEC | Brian G HarrisCFO | Sell Plan | 8,817136,149 held (−6%) | $103.08 | $909K | -12.1% | — |
| Aug 7SEC | Ronald J KramerCEO, Chair | Sell Plan | 8,1201,684,297 held (−0%) | $104.27 | $847K | -13.1% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 6,933750,913 held (−1%) | $105.46 | $731K | -14.1% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 5,476757,846 held (−1%) | $104.56 | $573K | -13.4% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 5,434765,908 held (−1%) | $103.53 | $563K | -12.5% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 5,341771,342 held (−1%) | $102.59 | $548K | -11.7% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 3,527779,473 held (−0%) | $100.46 | $354K | -9.8% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 2,790776,683 held (−0%) | $101.44 | $283K | -10.7% | — |
| Aug 7SEC | Brian G HarrisCFO | Sell Plan | 2,233133,916 held (−2%) | $104.01 | $232K | -12.9% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 2,217763,691 held (−0%) | $104.12 | $231K | -13.0% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 2,283783,000 held (−0%) | $99.67 | $228K | -9.1% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 2,074748,839 held (−0%) | $106.27 | $220K | -14.8% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 617785,283 held (−0%) | $98.68 | $61K | -8.2% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 211763,322 held (−0%) | $103.52 | $22K | -12.5% | — |
| Aug 7SEC | Robert F MehmelCOO, President | Sell Plan | 158763,533 held (−0%) | $102.03 | $16K | -11.2% | — |
| Jul 2SEC | Brian G HarrisCFO | Sell Plan | 6,183144,966 held (−4%) | $98.01 | $606K | -7.6% | — |
| Jul 2SEC | Robert F MehmelCOO, President | Sell Plan | 4,166785,900 held (−1%) | $97.76 | $407K | -7.3% | — |
| Jun 30SEC | Robert F MehmelCOO, President | Sell Plan | 230790,122 held (−0%) | $95.52 | $22K | -5.2% | — |
| Jun 30SEC | Robert F MehmelCOO, President | Sell Plan | 52790,070 held (−0%) | $96.14 | $5K | -5.8% | — |
| Jun 30SEC | Robert F MehmelCOO, President | Sell Plan | 4790,066 held (−0%) | $97.50 | $390 | -7.1% | — |
| Jun 26SEC | Robert F MehmelCOO, President | Sell Plan | 5,149793,076 held (−1%) | $95.62 | $492K | -5.3% | — |
| Jun 26SEC | Robert F MehmelCOO, President | Sell Plan | 4,626798,325 held (−1%) | $95.45 | $442K | -5.1% | — |
| Jun 26SEC | Robert F MehmelCOO, President | Sell Plan | 1,534791,542 held (−0%) | $96.41 | $148K | -6.0% | — |
| Jun 26SEC | Robert F MehmelCOO, President | Sell Plan | 1,190790,352 held (−0%) | $97.27 | $116K | -6.9% | — |
| Jun 26SEC | Robert F MehmelCOO, President | Sell Plan | 100798,225 held (−0%) | $96.03 | $10K | -5.7% | — |
| Jun 18SEC | Robert F MehmelCOO, President | Sell Plan | 2,921803,595 held (−0%) | $95.36 | $279K | -5.0% | — |
| Jun 18SEC | Robert F MehmelCOO, President | Sell Plan | 547802,951 held (−0%) | $95.37 | $52K | -5.0% | — |
| Jun 18SEC | Robert F MehmelCOO, President | Sell Plan | 97803,498 held (−0%) | $96.25 | $9K | -5.9% | — |
| Jun 16SEC | Robert F MehmelCOO, President | Sell Plan | 5,501809,788 held (−1%) | $95.18 | $524K | -4.8% | — |
| Jun 16SEC | Robert F MehmelCOO, President | Sell Plan | 3,272806,516 held (−0%) | $95.40 | $312K | -5.0% | — |
| Jun 15SEC | Ronald J KramerCEO, Chair | Sell | 51,0291,833,268 held (−3%) | $95.21 | $4.9M | -4.9% | — |
| Jun 15SEC | Ronald J KramerCEO, Chair | Sell | 48,9711,784,297 held (−3%) | $94.62 | $4.6M | -4.3% | — |
| Jun 15SEC | Brian G HarrisCFO | Sell Plan | 7,500151,149 held (−5%) | $95.03 | $713K | -4.7% | — |
| Mar 9SEC | Henry A AlpertDirector | Buy | 1,00071,479 held (+1%) | $79.99 | $80K | +13.3% | — |
| Feb 18SEC | W. Christopher DurborowPresident | Sell | 10,00029,963 held (−25%) | $91.97 | $920K | -1.5% | — |
| Feb 17SEC | Louis J. GrabowskyDirector | Sell | 11,00041,670 held (−21%) | $93.06 | $1.0M | -2.7% | — |
| Feb 17SEC | Michelle L TaylorDirector | Sell | 1,6509,023 held (−15%) | $92.56 | $153K | -2.1% | — |
| Feb 11SEC | Seth L. KaplanSr Vp, Gen. Counsel And Secy | Sell | 7,086127,661 held (−5%) | $94.67 | $671K | -4.3% | — |
| Feb 11SEC | Seth L. KaplanSr Vp, Gen. Counsel And Secy | Sell | 4,274123,387 held (−3%) | $95.61 | $409K | -5.3% | — |
| Feb 11SEC | Seth L. KaplanSr Vp, Gen. Counsel And Secy | Sell | 3,240120,147 held (−3%) | $96.67 | $313K | -6.3% | — |
| Feb 11SEC | James W SightDirector | Sell | 3,07013,872 held (−18%) | $96.15 | $295K | -5.8% | — |
| Feb 11SEC | Seth L. KaplanSr Vp, Gen. Counsel And Secy | Sell | 400119,747 held (−0%) | $97.46 | $39K | -7.0% | — |
Insiders at GRIFFON CORP
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Ronald J KramerCEO, Chair | — | $19.7M | Aug 7, 2026 | — |
| Robert F MehmelCOO, President | — | $9.4M | Aug 13, 2026 | — |
| Brian G HarrisCFO | — | $3.0M | Aug 11, 2026 | — |
| Seth L. KaplanSr Vp, Gen. Counsel And Secy | — | $1.4M | Feb 11, 2026 | — |
| Louis J. GrabowskyDirector | — | $1.0M | Feb 17, 2026 | — |
| W. Christopher DurborowPresident | — | $920K | Feb 18, 2026 | — |
| Kevin F SullivanDirector | — | $370K | Aug 14, 2026 | — |
| Cheryl L TurnbullDirector | — | $318K | Aug 14, 2026 | — |
| James W SightDirector | — | $295K | Feb 11, 2026 | — |
| Henry A AlpertDirector | $80K | — | Mar 9, 2026 | — |
| Michelle L TaylorDirector | — | $153K | Feb 17, 2026 | — |
GFF stock: common questions
Are GRIFFON CORP insiders buying GFF stock?
In the past 12 months, 1 insiders reported open-market purchases of GFF worth $80K. The latest was Director Henry A Alpert bought $80K of GFF at $79.99 — first open-market purchase in our records.
Are GRIFFON CORP insiders selling GFF stock?
10 insiders reported sales worth $36.7M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is GFF's 52-week range?
Over the past year GFF has traded between $66.11 and $106.98. It last closed at $90.59 on Oct 9, 2026.