Griffon Corp (GFF) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Aug 14, 2026.
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- Filings shown
- 8
- Open-market buys
- 0
- Open-market sells
- 29
Counts cover the 8 most recent Form 4 filings Tradune holds for GFF (filed Aug 7 – Aug 14, 2026). No completed check of GFF's Form 4 list on SEC EDGAR is on record yet; the latest GFF filing Tradune holds was filed Aug 14, 2026. This is not guaranteed to be the complete record — see GFF's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 8 filings Tradune holds for GFF filed Aug 7 – Aug 14, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
29 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 27 sales· 179,185 sh
- checkbox disclosed
- On filings with the box not checked
- 2 sales· 6,500 sh
- not proof that no plan exists
- Not comparable
- 0 sales· 0 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Robert F. MehmelPresident and COO | 0 | 19 | — | 62,868 | −$6,579,054 |
| Ronald J. KramerChairman of the Board and CEO | 0 | 5 | — | 100,000 | −$10,241,980 |
| Brian G. HarrisEVP, Chief Financial Officer | 0 | 3 | — | 16,317 | −$1,705,259 |
| Kevin F. SullivanDirector | 0 | 1 | — | 3,500 | −$369,565 |
| Cheryl L. TurnbullDirector | 0 | 1 | — | 3,000 | −$318,360 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at GFF
No open-market insider purchases (Form 4 code P) were reported for GFF in the trailing 90 days. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 3,000 | $106.12 | 30,039 | −9.1% | Aug 13, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 3,500 | $105.59 | 40,602 | −7.9% | Aug 13, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 3,240 | $107.16 | 723,032 | −0.4% | Aug 11, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 88 | $105.21 | 726,272 | −0.0% | Aug 10, 2026 |
| Open-market sale 10b5-1 box checked | 3,638 | $104.08 | 729,273 | −0.5% | Aug 10, 2026 |
| Open-market sale 10b5-1 box checked | 2,913 | $104.64 | 726,360 | −0.4% | Aug 10, 2026 |
| Open-market sale 10b5-1 box checked | 553 | $108.09 | 732,911 | −0.1% | Aug 7, 2026 |
| Open-market sale 10b5-1 box checked | 1,911 | $106.60 | 746,928 | −0.3% | Aug 7, 2026 |
| Open-market sale 10b5-1 box checked | 13,464 | $107.43 | 733,464 | −1.8% | Aug 7, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 5,267 | $107.11 | 128,649 | −3.9% | Aug 7, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 2,074 | $106.27 | 748,839 | −0.3% | Aug 6, 2026 |
| Open-market sale 10b5-1 box checked | 158 | $102.03 | 763,533 | −0.0% | Aug 6, 2026 |
| Open-market sale 10b5-1 box checked | 211 | $103.52 | 763,322 | −0.0% | Aug 6, 2026 |
| Open-market sale 10b5-1 box checked | 5,476 | $104.56 | 757,846 | −0.7% | Aug 6, 2026 |
| Open-market sale 10b5-1 box checked | 6,933 | $105.46 | 750,913 | −0.9% | Aug 6, 2026 |
| Open-market sale 10b5-1 box checked | 617 | $98.68 | 785,283 | −0.1% | Aug 5, 2026 |
| Open-market sale 10b5-1 box checked | 2,283 | $99.67 | 783,000 | −0.3% | Aug 5, 2026 |
| Open-market sale 10b5-1 box checked | 3,527 | $100.46 | 779,473 | −0.5% | Aug 5, 2026 |
| Open-market sale 10b5-1 box checked | 5,341 | $102.59 | 771,342 | −0.7% | Aug 5, 2026 |
| Open-market sale 10b5-1 box checked | 5,434 | $103.53 | 765,908 | −0.7% | Aug 5, 2026 |
| Open-market sale 10b5-1 box checked | 2,217 | $104.12 | 763,691 | −0.3% | Aug 5, 2026 |
| Open-market sale 10b5-1 box checked | 2,790 | $101.44 | 776,683 | −0.4% | Aug 5, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 8,817 | $103.08 | 136,149 | −6.1% | Aug 5, 2026 |
| Open-market sale 10b5-1 box checked | 2,233 | $104.01 | 133,916 | −1.6% | Aug 5, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 45,240 | $102.63 | 1,708,819 | −2.6% | Aug 5, 2026 |
| Open-market sale 10b5-1 box checked | 16,402 | $103.37 | 1,692,417 | −1.0% | Aug 5, 2026 |
| Open-market sale 10b5-1 box checked | 8,120 | $104.27 | 1,684,297 | −0.5% | Aug 5, 2026 |
| Open-market sale 10b5-1 box checked | 17,322 | $101.58 | 1,754,059 | −1.0% | Aug 5, 2026 |
| Open-market sale 10b5-1 box checked | 12,916 | $100.44 | 1,771,381 | −0.7% | Aug 5, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to GFF's (Aug 14, 2026).
Frequently asked about GFF insider activity
How many insiders bought GFF stock in the last 90 days?
No open-market purchases (Form 4 code P) of GFF shares were reported by Griffon Corp insiders in the trailing 90 days. The 8 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for GFF?
The most recent Form 4 on this page was filed by Kevin F. Sullivan (Director) on Aug 14, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market GFF insider sale shown?
The largest open-market sale among the filings shown was 45,240 GFF shares at $102.63 (about $4,642,981) by Ronald J. Kramer (Chairman of the Board and CEO) on Aug 5, 2026. Value is shares × the price reported on the Form 4; that Form 4 has the Rule 10b5-1 box checked.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track GFF insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.