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Griffon Corporation

IndustrialsRussell 2000

Griffon Corporation insider trading

Griffon Corporation files with the SEC as a Metal Doors, Sash, Frames, Moldings & Trim company headquartered in New York, NY. Every time one of its executives or directors buys or sells the stock, the filing appears here the moment it reaches the SEC — with grants and option exercises set apart from the trades that cost the insider their own money.

From SEC filings

Recent GFF insider transactions

5 insiders traded GFF on the open market between Aug 05, 2026 and Aug 13, 2026 — 24 sales worth $17.2M, of which 22 were pre-scheduled under a 10b5-1 plan.

Bought
—
Sold
$17.2M

22 of 24 on a 10b5-1 plan

Net
−$17.2M
Insiders
5

Open-market purchases (code P) and sales (code S) from Griffon Corporation's own SEC Form 4 filings. Grants and option exercises are excluded — they are compensation, not decisions. Share counts are derived from the reported value and price. Verify any figure against the original filing before acting on it; this is monitoring, not advice.

Filing history last read from EDGAR on Sep 23, 2026. The live dashboard shows new filings the moment they clear.

Every GFF Form 4 on SEC.gov

SEC Form 4 data, Q3 2024 to Q2 2026

GFF insider trading by quarter

Between Jul 01, 2024 and Jun 30, 2026, 14 insiders traded GFF on the open market: 1 purchase worth $80K and 89 sales worth $69.6M, 64 of the sales pre-scheduled under a 10b5-1 plan. In the last four quarters alone: 1 purchase ($80K) and 24 sales ($16.4M), by 9 insiders.

QuarterBoughtSold
Q2 2026—−$12.6M16 sales · 14 on a plan
Q1 2026+$80K1 buy−$3.8M8 sales
Q4 2025——
Q3 2025——
Q2 2025——
Q1 2025—−$450.8K3 sales
Q4 2024—−$31.7M33 sales · 25 on a plan
Q3 2024—−$21M29 sales · 25 on a plan
Largest purchase
+$80K of GFF by Alpert Henry A (Director) on Mar 05, 2026.
Largest sale
−$6.8M of GFF by Kramer Ronald J (Chairman of the Board and CEO · Director) on Nov 13, 2024, under a 10b5-1 plan.

Open-market transactions through Jun 30, 2026most recent first

  • Mehmel Robert F10b5-1

    President and COO

    −$22K

    Jun 26, 2026

    230 sh · $95.52

  • Mehmel Robert F10b5-1

    President and COO

    −$5K

    Jun 26, 2026

    52 sh · $96.14

  • Mehmel Robert F10b5-1

    President and COO

    −$390

    Jun 26, 2026

    4 sh · $97.50

  • Mehmel Robert F10b5-1

    President and COO

    −$492.3K

    Jun 25, 2026

    5,149 sh · $95.62

  • Mehmel Robert F10b5-1

    President and COO

    −$147.9K

    Jun 25, 2026

    1,534 sh · $96.41

  • Mehmel Robert F10b5-1

    President and COO

    −$115.8K

    Jun 25, 2026

    1,190 sh · $97.27

  • Mehmel Robert F10b5-1

    President and COO

    −$441.6K

    Jun 24, 2026

    4,626 sh · $95.45

  • Mehmel Robert F10b5-1

    President and COO

    −$9.6K

    Jun 24, 2026

    100 sh · $96.03

  • Mehmel Robert F10b5-1

    President and COO

    −$52.2K

    Jun 17, 2026

    547 sh · $95.37

  • Mehmel Robert F10b5-1

    President and COO

    −$278.5K

    Jun 16, 2026

    2,921 sh · $95.36

  • Mehmel Robert F10b5-1

    President and COO

    −$9.3K

    Jun 16, 2026

    97 sh · $96.25

  • Mehmel Robert F10b5-1

    President and COO

    −$312.1K

    Jun 15, 2026

    3,272 sh · $95.40

  • Kramer Ronald J

    Chairman of the Board and CEO · Director

    −$4.9M

    Jun 12, 2026

    51,029 sh · $95.21

  • Kramer Ronald J

    Chairman of the Board and CEO · Director

    −$4.6M

    Jun 12, 2026

    48,971 sh · $94.62

  • Mehmel Robert F10b5-1

    President and COO

    −$523.6K

    Jun 12, 2026

    5,501 sh · $95.18

From SEC's quarterly Form 3, 4 and 5 data sets: code P purchases and code S sales of common stock, by the date the trade happened. Where a fund and the people who control it each report the same block, it is counted once. Trades made in the last days of Q2 2026 but filed after it closed arrive with SEC's next quarterly release.

Griffon Corporation company record

SEC industry classification
Metal Doors, Sash, Frames, Moldings & Trim
Headquarters
New York, NY
Incorporated in
DE
Listed on
NYSE
SEC Central Index Key
0000050725
Previously filed as
INSTRUMENT SYSTEMS CORP /DE/

Sourced from this company's own SEC submissions record. The industry label is SEC's Standard Industrial Classification, which is more specific than the Industrials sector shown above.

After insiders bought GFF

What the stock actually did in the 90 days following each open-market purchase

Don't check GFF — let it ping you

Get told the moment an insider moves on GFF

Pro watches Griffon Corporation for you and sends a Telegram ping within moments of a Form 4 clearing EDGAR — a C-suite open-market buy, a cluster, a 10b5-1 regime break — long before it reaches the press. Add GFF to a watchlist, see each mover's benchmark-measured track record and which legendary funds hold it, and read the full filing history instead of the last 72 hours.

Track GFF on the live dashboardFilings on SEC.gov

The live dashboard is free to open. Alerts, watchlists, full filing history and each mover's benchmark-measured track record are Pro. Monitoring, not advice.

How to read GFF insider activity

Open-market purchase (code P)
An insider spending their own money at market price. This is the only buy code that reliably carries signal — it is a decision, not compensation.
Grants and option exercises (codes A, M)
Scheduled compensation. Most "insider buying" headlines are really this, which is why InsiderPulse weights it at a fraction of a real purchase.
Cluster buy
Two or more different insiders buying on the open market in the same window. One executive buying can mean anything; three is much harder to explain away.

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This week on the tape: who actually chose to sellThe weekly split of scheduled 10b5-1 selling vs deliberate sales, with the deciders named.

Questions

Are GFF insiders buying or selling?
Between Aug 05, 2026 and Aug 13, 2026, 5 Griffon Corporation insiders made no open-market purchases and 24 sales worth $17.2M, a net sale of $17.2M. 22 of the sales were pre-scheduled under a Rule 10b5-1 plan.
How much GFF stock have insiders bought and sold in the last two years?
Between Jul 01, 2024 and Jun 30, 2026, 14 Griffon Corporation insiders made 1 open-market purchase worth $80K and 89 sales worth $69.6M. 64 of the sales were pre-scheduled under a Rule 10b5-1 plan. In the four quarters to Jun 30, 2026: 1 purchase ($80K) and 24 sales ($16.4M). The largest purchase was Alpert Henry A buying $80K on Mar 05, 2026. The largest sale was Kramer Ronald J selling $6.8M on Nov 13, 2024.
What was the largest recent GFF insider trade?
Kramer Ronald J (Chairman of the Board and CEO · Director) sold $4.6M of GFF stock on Aug 05, 2026 at about $102.63 a share, under a pre-scheduled 10b5-1 plan.
When did an insider last buy GFF shares?
No open-market purchase by a Griffon Corporation insider appears in the filings from Aug 05, 2026 to Aug 13, 2026 — every recorded open-market transaction in that period was a sale. Before that, the most recent purchase in SEC's data was Alpert Henry A buying $80K on Mar 05, 2026.
Where does GFF insider trading data come from?
From the Form 4 filings Griffon Corporation's officers, directors and 10% owners must send the SEC within two business days of a trade. Each row on this page links to its original filing on SEC EDGAR. Share grants and option exercises are kept apart from open-market purchases and sales, because only the latter cost the insider their own money.

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