Griffon Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -28.57. In total, the insiders bought 1.45M and sold 1.39M GFF shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power

(Last 100 transactions)
-28.57
Buy 1.45M shares
Sell 1.39M shares
41% Buy Activity
Moderate Positive Correlation
Buy Signal Low Confidence
Nov 18, 2025

Analysis Breakdown:

  • Signal is highly questionable due to a strongly contradictory negative Insider Power Score of -28.57.
  • Partially supported by a positive historical correlation.
  • Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date Type Person Role Amount
Dec 02, 2024
Sell
Common Stock
S-Sale
Kaplan Seth L.
Sr Vp, Gen. Counsel And Secy
Officer 4 239
Value: $353.3K
Dec 02, 2024
Sell
Common Stock
S-Sale
Kaplan Seth L.
Sr Vp, Gen. Counsel And Secy
Officer 100
Value: $8K
Dec 02, 2024
Sell
Common Stock
S-Sale
Harris Brian G
EVP, Chief Financial Officer
C-Suite Officer 13 983
Value: $1.15M
Dec 02, 2024
Sell
Common Stock
S-Sale
Harris Brian G
EVP, Chief Financial Officer
C-Suite Officer 4 557
Value: $378.7K
Dec 02, 2024
Sell
Common Stock
S-Sale
Harris Brian G
EVP, Chief Financial Officer
C-Suite Officer 4 557
Value: $378.7K
Dec 02, 2024
Sell
Common Stock
S-Sale
Harris Brian G
EVP, Chief Financial Officer
C-Suite Officer 13 983
Value: $1.15M
Dec 02, 2024
Sell
Common Stock
S-Sale
Kaplan Seth L.
Sr Vp, Gen. Counsel And Secy
Officer 100
Value: $8K
Dec 02, 2024
Sell
Common Stock
S-Sale
Kaplan Seth L.
Sr Vp, Gen. Counsel And Secy
Officer 4 239
Value: $353.3K
Dec 02, 2024
Sell
Common Stock
S-Sale
Kaplan Seth L.
Sr Vp, Gen. Counsel And Secy
Officer 8 327
Value: $686.1K
Nov 30, 2024
Sell
Common Stock
F-InKind
Kaplan Seth L.
Sr Vp, Gen. Counsel And Secy
Officer 10 407
Value: $877.3K
Nov 30, 2024
Sell
Common Stock
F-InKind
Durborow W. Christopher
Vice President & Cao
CEO / President 5 243
Value: $442.0K
Nov 30, 2024
Sell
Common Stock
F-InKind
Harris Brian G
EVP, Chief Financial Officer
C-Suite Officer 8 879
Value: $748.5K
Nov 30, 2024
Sell
Common Stock
F-InKind
Harris Brian G
EVP, Chief Financial Officer
C-Suite Officer 8 879
Value: $748.5K
Nov 30, 2024
Sell
Common Stock
F-InKind
Durborow W. Christopher
Vice President & Cao
CEO / President 5 243
Value: $442.0K
Nov 30, 2024
Sell
Common Stock
F-InKind
Kaplan Seth L.
Sr Vp, Gen. Counsel And Secy
Officer 10 407
Value: $877.3K
Nov 27, 2024
Sell
Common Stock
G-Gift
Mehmel Robert F
President And COO
CEO / President 15 000
Value: $0
Nov 26, 2024
Sell
Common Stock
S-Sale
Renuart Victor Eugene
Director
Director 4 500
Value: $380.1K
Aug 10, 2022
Sell
Common Stock
S-Sale
Renuart Victor Eugene
Director
Director 767
Value: $25.1K
Jun 24, 2022
Sell
Common Stock
S-Sale
Renuart Victor Eugene
Director
Director 2 617
Value: $70.1K
Jun 07, 2021
Sell
Common Stock
S-Sale
Renuart Victor Eugene
Director
Director 2 900
Value: $75.0K
Oct 11, 2019
Sell
Common Stock
S-Sale
Renuart Victor Eugene
Director
Director 2 442
Value: $49.8K
Oct 11, 2019
Sell
Common Stock
S-Sale
Renuart Victor Eugene
Director
Director 2 442
Value: $49.8K
Jul 11, 2019
Sell
Common Stock
S-Sale
Renuart Victor Eugene
Director
Director 194
Value: $3K
Jul 11, 2019
Sell
Common Stock
S-Sale
Renuart Victor Eugene
Director
Director 194
Value: $3K
Jul 05, 2019
Sell
Common Stock
S-Sale
Renuart Victor Eugene
Director
Director 3 710
Value: $60.2K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

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ABOUT GRIFFON CORPORATION
Griffon
Griffon Corporation, through its subsidiaries, provides consumer and professional, and home and building products in the United States, Europe, Canada, Australia, and internationally. Its Consumer and Professional Products segment manufactures and markets long-handled tools and landscaping products for homeowners and professionals; wood and wire closet organization, general living storage, and wire garage storage products to home center retail ch...
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