NYSE · CIK 0000050725
GFF GRIFFON CORP
Insider trading from SEC Form 4. Last filing Aug 14, 2026. Close $89.74 on Oct 12, 2026, +36% from the 52-week low and -16% from the high.
In brief
GRIFFON CORP (GFF) has 90 SEC Form 4 filings on file from 14 insiders, the latest filed on Aug 14, 2026. In the last 90 days insiders made 0 open-market buys worth $0 and 8 open-market sells worth $19M, net -$19M.
39 open-market trades have been scored at GFF. The newest: Kevin F Sullivan (director) sold $370k of stock on Aug 13, 2026, filed Aug 14, 2026, scored 45 (moderate). The largest of the 39 shown: Ronald J Kramer (Chairman of the Board and CEO) sold $23M on Nov 11, 2024, scored 50 (moderate), under a 10b5-1 plan. 5 insiders sold within 14 days of each other around Aug 13, 2026.
25 Form 144 notices of planned sales are on file, the latest filed Aug 13, 2026.
Last 90 days
Net insider value
-$19M
more sold than bought
Buys
0
$0 by 0 insiders
Sells
8
$19M by 5 insiders
Insiders on file
14
with a Form 4 at this company
Price and insider trades, last year
GFFOct 12, 2026 · close 89.74
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at GRIFFON CORP, scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 45Moderate | Kevin F Sullivan director sell | $370k 3,500 shares | -8% | +60% from low-1% from high | |
| 44Moderate | Cheryl L Turnbull director sell | $318k 3,000 shares | -9% | +60% from low-1% from high | |
| 30Weak | Robert F Mehmel President and COO sell | $347k 3,240 shares | -0% | +61% from low-0% from high | |
| 36Weak | Brian G Harris EVP, Chief Financial Officer sell | $564k 5,267 shares | -4% | +62% from low0% from high | |
| 40Moderate | Robert F Mehmel President and COO sell | $2.4M 22,567 shares | -3% | +62% from low0% from high | |
| 40Moderate | Robert F Mehmel President and COO sell | $3.8M 37,061 shares | -5% | +55% from low0% from high | |
| 45Moderate | Ronald J Kramer Chairman of the Board and CEO sell | $10M 100,000 shares | -6% | +55% from low0% from high | |
| 42Moderate | Brian G Harris EVP, Chief Financial Officer sell | $1.1M 11,050 shares | -8% | +55% from low0% from high | |
| 29Weak | Brian G Harris EVP, Chief Financial Officer sell | $606k 6,183 shares | -4% | +47% from low0% from high | |
| 24Weak | Robert F Mehmel President and COO sell | $407k 4,166 shares | -1% | +47% from low0% from high | |
| 20Weak | Robert F Mehmel President and COO sell | $27k 286 shares | -0% | +46% from low0% from high | |
| 40Moderate | Robert F Mehmel President and COO sell | $1.2M 12,599 shares | -2% | +43% from low-0% from high | |
| 30Weak | Robert F Mehmel President and COO sell | $340k 3,565 shares | -0% | +42% from low-1% from high | |
| 38Weak | Robert F Mehmel President and COO sell | $836k 8,773 shares | -1% | +41% from low-2% from high | |
| 38Weak | Brian G Harris EVP, Chief Financial Officer sell | $713k 7,500 shares | -5% | +44% from low0% from high | |
| 65Notable | Ronald J Kramer Chairman of the Board and CEO sell | $9.5M 100,000 shares | -5% | +41% from low-2% from high | |
| 28Weak | Henry A Alpert director buy | $80k 1,000 shares | +1% | +25% from low-16% from high | |
| 64Notable | W. Christopher Durborow Vice President & CAO sell | $920k 10,000 shares | -25% | +43% from low-3% from high | |
| 46Moderate | Michelle L Taylor director sell | $153k 1,650 shares | -15% | +44% from low-3% from high | |
| 60Notable | Louis J. Grabowsky director sell | $1.0M 11,000 shares | -21% | +46% from low-1% from high | |
| 49Moderate | James W Sight director sell | $295k 3,070 shares | -18% | +48% from low-0% from high | |
| 60Notable | Seth L. Kaplan Sr VP, Gen. Counsel and Secy sell | $1.4M 15,000 shares | -11% | +48% from low-0% from high | |
| 40Moderate | Samanta Hegedus director sell | $98k 1,236 shares | -5% | - | |
| 40Moderate | James W Sight director sell | $110k 1,360 shares | -8% | - | |
| 43Moderate | Cheryl L Turnbull director sell | $242k 3,000 shares | -9% | - | |
| 51Moderate | W. Christopher Durborow Vice President & CAO sell | $416k 5,170 shares | -10% | - | |
| 47Moderate | Brian G Harris EVP, Chief Financial Officer sell | $1.5M 18,540 shares | -10% | - | |
| 35Weak | Seth L. Kaplan Sr VP, Gen. Counsel and Secy sell | $1.0M 12,666 shares | -8% | - | |
| 45Moderate | Victor Eugene Renuart director sell | $663k 17,130 shares | -47% | - | |
| 56Moderate | Kevin F Sullivan director sell | $696k 9,222 shares | -18% | - | |
| 46Moderate | Jerome L Coben director sell | $157k 2,052 shares | -11% | - | |
| 58Moderate | Louis J. Grabowsky director sell | $847k 11,000 shares | -18% | - | |
| 48Moderate | Samanta Hegedus director sell | $249k 3,095 shares | -11% | - | |
| 40Moderate | Robert F Mehmel President and COO sell | $1.9M 25,000 shares | -3% | - | |
| 49Moderate | James W Sight director sell | $280k 3,660 shares | -18% | - | |
| 35Weak | Robert F Mehmel President and COO sell | $610k 8,697 shares | -1% | - | |
| 50Moderate | Ronald J Kramer Chairman of the Board and CEO sell | $23M 308,921 shares | -14% | - | |
| 30Weak | Ronald J Kramer Chairman of the Board and CEO sell | $458k 6,532 shares | -0% | - | |
| 16Weak | Robert F Mehmel President and COO sell | $64k 912 shares | -0% | - |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Aug 13, 2026 | Kevin F. Sullivan Director | 3,500 0.01% of outstanding | $367k | Aug 13, 2026 | none |
| Aug 13, 2026 | TURNBULL CHERYL L Director | 3,000 0.01% of outstanding | $320k | Aug 13, 2026 | none |
| Aug 7, 2026 | Harris Brian G Officer | 5,267 0.01% of outstanding | $564k | Aug 7, 2026 | $2.5M |
| Aug 5, 2026 | Ronald J. Kramer Director and Officer | 100,000 0.22% of outstanding | $9.4M | Aug 5, 2026 | $9.5M |
| Aug 5, 2026 | Harris Brian G Officer | 11,050 0.02% of outstanding | $1.1M | Aug 5, 2026 | $1.3M |
| Aug 5, 2026 | Robert Mehmel Director | 50,000 0.11% of outstanding | $5.1M | Aug 5, 2026 | $4.9M |
| Jun 30, 2026 | Harris Brian G Officer | 6,183 0.01% of outstanding | $606k | Jun 30, 2026 | $713k |
| Jun 12, 2026 | Ronald J. Kramer Director and Officer | 100,000 0.22% of outstanding | $9.1M | Jun 12, 2026 | none |
| Jun 12, 2026 | Robert Mehmel Director | 50,000 0.11% of outstanding | $4.7M | Jun 12, 2026 | none |
| Jun 11, 2026 | Harris Brian G Officer | 7,500 0.02% of outstanding | $713k | Jun 11, 2026 | none |
| Feb 17, 2026 | William C Durborow Officer | 10,000 0.02% of outstanding | $921k | Feb 17, 2026 | none |
| Feb 13, 2026 | Louis J. Grabowsky Director | 11,000 0.02% of outstanding | $1.0M | Feb 13, 2026 | none |
| Feb 12, 2026 | Taylor Michelle L Officer | 1,650 0.00% of outstanding | $153k | Feb 12, 2026 | none |
| Feb 9, 2026 | Ronald J. Kramer Director and Officer | 100,000 0.21% of outstanding | $9.5M | Feb 9, 2026 | none |
| Feb 9, 2026 | Seth L. Kaplan Officer | 15,000 0.03% of outstanding | $1.4M | Feb 9, 2026 | none |
| Feb 9, 2026 | JAMES SIGHT Director | 3,070 0.01% of outstanding | $295k | Feb 9, 2026 | none |
| Feb 7, 2025 | Samanta Hegedus Stewart Director | 1,236 0.00% of outstanding | $100k | Feb 7, 2025 | $249k |
| Feb 6, 2025 | Cheryl L. Turnbull Director | 3,000 0.01% of outstanding | $243k | Feb 6, 2025 | none |
| Feb 6, 2025 | JAMES W SIGHT Director | 1,360 0.00% of outstanding | $110k | Feb 6, 2025 | $280k |
| Dec 6, 2024 | W. Christopher Durborow Officer | 5,170 0.01% of outstanding | $417k | Dec 6, 2024 | none |
| Nov 29, 2024 | Seth L. Kaplan Officer | 12,666 0.03% of outstanding | $1.1M | Dec 2, 2024 | $2.5M |
| Nov 29, 2024 | Harris Brian G Officer | 18,540 0.04% of outstanding | $1.6M | Nov 29, 2024 | $1.3M |
| Nov 26, 2024 | Renuart Victor Eugene Director | 4,500 0.01% of outstanding | $373k | Nov 26, 2024 | none |
| Nov 18, 2024 | Kevin F. Sullivan Director | 9,222 0.02% of outstanding | $681k | Nov 18, 2024 | $809k |
| Nov 14, 2024 | COBEN REV TRUST Director | 2,052 0.00% of outstanding | $157k | Nov 14, 2024 | none |
Transactions
The newest 50 of 157 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 13, 2026 | Cheryl L Turnbull director | SOpen-market sale Common Stock | -3,000 | $106.12 | $318k | 30,039 | Aug 14, 2026 |
| Aug 13, 2026 | Kevin F Sullivan director | SOpen-market sale Common Stock | -3,500 | $105.59 | $370k | 40,602 | Aug 14, 2026 |
| Aug 11, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -3,240 | $107.16 | $347k | 723,032 | Aug 13, 2026 |
| Aug 7, 2026 | Brian G Harris EVP, Chief Financial Officer | SOpen-market sale Common Stock10b5-1 | -5,267 | $107.11 | $564k | 128,649 | Aug 11, 2026 |
| Aug 7, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -1,911 | $106.60 | $204k | 746,928 | Aug 11, 2026 |
| Aug 7, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -13,464 | $107.43 | $1.4M | 733,464 | Aug 11, 2026 |
| Aug 7, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -553 | $108.09 | $60k | 732,911 | Aug 11, 2026 |
| Aug 10, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -3,638 | $104.08 | $379k | 729,273 | Aug 11, 2026 |
| Aug 10, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -2,913 | $104.64 | $305k | 726,360 | Aug 11, 2026 |
| Aug 10, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -88 | $105.21 | $9,258 | 726,272 | Aug 11, 2026 |
| Aug 5, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -617 | $98.68 | $61k | 785,283 | Aug 7, 2026 |
| Aug 5, 2026 | Ronald J Kramer Chairman of the Board and CEO | SOpen-market sale Common Stock10b5-1 | -12,916 | $100.44 | $1.3M | 1,771,381 | Aug 7, 2026 |
| Aug 5, 2026 | Brian G Harris EVP, Chief Financial Officer | SOpen-market sale Common Stock10b5-1 | -8,817 | $103.08 | $909k | 136,149 | Aug 7, 2026 |
| Aug 5, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -2,283 | $99.67 | $228k | 783,000 | Aug 7, 2026 |
| Aug 5, 2026 | Ronald J Kramer Chairman of the Board and CEO | SOpen-market sale Common Stock10b5-1 | -17,322 | $101.58 | $1.8M | 1,754,059 | Aug 7, 2026 |
| Aug 5, 2026 | Brian G Harris EVP, Chief Financial Officer | SOpen-market sale Common Stock10b5-1 | -2,233 | $104.01 | $232k | 133,916 | Aug 7, 2026 |
| Aug 5, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -3,527 | $100.46 | $354k | 779,473 | Aug 7, 2026 |
| Aug 5, 2026 | Ronald J Kramer Chairman of the Board and CEO | SOpen-market sale Common Stock10b5-1 | -45,240 | $102.63 | $4.6M | 1,708,819 | Aug 7, 2026 |
| Aug 5, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -2,790 | $101.44 | $283k | 776,683 | Aug 7, 2026 |
| Aug 5, 2026 | Ronald J Kramer Chairman of the Board and CEO | SOpen-market sale Common Stock10b5-1 | -16,402 | $103.37 | $1.7M | 1,692,417 | Aug 7, 2026 |
| Aug 5, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -5,341 | $102.59 | $548k | 771,342 | Aug 7, 2026 |
| Aug 5, 2026 | Ronald J Kramer Chairman of the Board and CEO | SOpen-market sale Common Stock10b5-1 | -8,120 | $104.27 | $847k | 1,684,297 | Aug 7, 2026 |
| Aug 5, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -5,434 | $103.53 | $563k | 765,908 | Aug 7, 2026 |
| Aug 5, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -2,217 | $104.12 | $231k | 763,691 | Aug 7, 2026 |
| Aug 6, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -158 | $102.03 | $16k | 763,533 | Aug 7, 2026 |
| Aug 6, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -211 | $103.52 | $22k | 763,322 | Aug 7, 2026 |
| Aug 6, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -5,476 | $104.56 | $573k | 757,846 | Aug 7, 2026 |
| Aug 6, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -6,933 | $105.46 | $731k | 750,913 | Aug 7, 2026 |
| Aug 6, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -2,074 | $106.27 | $220k | 748,839 | Aug 7, 2026 |
| Jun 30, 2026 | Brian G Harris EVP, Chief Financial Officer | SOpen-market sale Common Stock10b5-1 | -6,183 | $98.01 | $606k | 144,966 | Jul 2, 2026 |
| Jun 30, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -4,166 | $97.76 | $407k | 785,900 | Jul 2, 2026 |
| Jun 26, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -230 | $95.52 | $22k | 790,122 | Jun 30, 2026 |
| Jun 26, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -52 | $96.14 | $4,999 | 790,070 | Jun 30, 2026 |
| Jun 26, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -4 | $97.50 | $390 | 790,066 | Jun 30, 2026 |
| Jun 24, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -4,626 | $95.45 | $442k | 798,325 | Jun 26, 2026 |
| Jun 24, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -100 | $96.03 | $9,603 | 798,225 | Jun 26, 2026 |
| Jun 25, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -5,149 | $95.62 | $492k | 793,076 | Jun 26, 2026 |
| Jun 25, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -1,534 | $96.41 | $148k | 791,542 | Jun 26, 2026 |
| Jun 25, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -1,190 | $97.27 | $116k | 790,352 | Jun 26, 2026 |
| Jun 16, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -2,921 | $95.36 | $279k | 803,595 | Jun 18, 2026 |
| Jun 16, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -97 | $96.25 | $9,336 | 803,498 | Jun 18, 2026 |
| Jun 17, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -547 | $95.37 | $52k | 802,951 | Jun 18, 2026 |
| Jun 12, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -5,501 | $95.18 | $524k | 809,788 | Jun 16, 2026 |
| Jun 15, 2026 | Robert F Mehmel President and COO | SOpen-market sale Common Stock10b5-1 | -3,272 | $95.40 | $312k | 806,516 | Jun 16, 2026 |
| Jun 12, 2026 | Ronald J Kramer Chairman of the Board and CEO | SOpen-market sale Common Stock | -51,029 | $95.21 | $4.9M | 1,833,268 | Jun 15, 2026 |
| Jun 11, 2026 | Brian G Harris EVP, Chief Financial Officer | SOpen-market sale Common Stock10b5-1 | -7,500 | $95.03 | $713k | 151,149 | Jun 15, 2026 |
| Jun 12, 2026 | Ronald J Kramer Chairman of the Board and CEO | SOpen-market sale Common Stock | -48,971 | $94.62 | $4.6M | 1,784,297 | Jun 15, 2026 |
| Mar 5, 2026 | Henry A Alpert director | POpen-market purchase Common Stock | +1,000 | $79.99 | $80k | 71,479 | Mar 9, 2026 |
| Feb 18, 2026 | Henry A Alpert director | AGrant or award Common Stock | +1,340 | $0.00 | $0 | 70,479 | Feb 20, 2026 |
| Feb 18, 2026 | Jerome L Coben director | AGrant or award Common Stock | +1,340 | $0.00 | $0 | 19,459 | Feb 20, 2026 |
50 of 157 rows shown.
Insiders
Everyone who has filed a Form 4 here.
- Henry A Alpertdirector
- Jerome L Cobendirector
- W. Christopher DurborowVice President & CAO
- Louis J. Grabowskydirector
- Brian G HarrisSVP, Chief Financial Officer
- Samanta Hegedusdirector
- Ronald J KramerChairman of the Board and CEO
- Seth L. KaplanSr VP, Gen. Counsel and Secy
- Robert F MehmelPresident and COO
- Victor Eugene Renuartdirector
- James W Sightdirector
- Kevin F Sullivandirector
- Cheryl L Turnbulldirector
- Michelle L Taylordirector
Questions about GFF
Answered from the filings on this page, as of the latest one.
Are insiders buying GFF?
As of Aug 14, 2026, SEC Form 4 filings show 0 open-market buys worth $0 by 0 insiders and 8 open-market sells worth $19M by 5 insiders at GRIFFON CORP in the last 90 days, net -$19M. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade GFF on the open market?
Kevin F Sullivan (director) sold $370k of GFF on Aug 13, 2026 and filed the Form 4 on Aug 14, 2026. InsiderTell scored 45 (moderate), with 5 insiders on the same side within 14 days.
How many insiders file Form 4 at GRIFFON CORP?
14 people have filed a Form 4 at GRIFFON CORP, among them Henry A Alpert (director), Jerome L Coben (director), W. Christopher Durborow (Vice President & CAO). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.