Comparable stake leader
BlackRock, Inc.
SEC ownership of GRIFFON CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000050725.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
12 Jun 2026
- Public ticker
- GFF on NYSE
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
12 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000050725
- Issuer location
- New York, NY
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of GRIFFON CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
12 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 12%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 12%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
12%
VANGUARD PORTFOLIO MANAGEMENT LLC
8.1%
Ronald J. Kramer
3.9%
Robert F. Mehmel
1.7%
Brian G. Harris
0.34%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
12%
from 13D/G
|
$433,344,672
5,962,365 shares
|
— | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
8.1%
|
$274,619,781
3,778,478 shares
|
$0 | 31 Mar 2026 |
| Ronald J. Kramer |
3/4/5
Chairman of the Board and CEO, Director
|
3.9%
|
$172,139,883
1,829,835 shares
|
-$9,492,107 | 12 Jun 2026 |
| Robert F. Mehmel |
3/4/5
President and COO
|
1.7%
|
$77,248,262
810,735 shares
|
-$835,734 | 12 Jun 2026 |
| Brian G. Harris |
3/4/5
EVP, Chief Financial Officer
|
0.34%
|
$14,723,018
156,093 shares
|
-$712,725 | 11 Jun 2026 |
| Seth L. Kaplan |
3/4/5
Sr VP, Gen. Counsel and Secy
|
0.27%
|
$12,029,683
124,533 shares
|
-$1,431,664 | 09 Feb 2026 |
| Henry A. Alpert |
3/4/5
Director
|
0.15%
|
$5,717,605
71,479 shares
|
+$79,990 | 05 Mar 2026 |
| Kevin F. Sullivan |
3/4/5
Director
|
0.09%
|
$3,309,414
44,102 shares
|
— | 18 Feb 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$14,783,504.
Buys
$79,990
Insiders: 1
Sells
$14,863,494
Insiders: 8
Net
-$14,783,504
Shares: -155,993
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 1,000
Shares: 156,993
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 116,273 | $0 | $11,040,566 | -$11,040,566 |
| 3-6 | 1,000 | 40,720 | $79,990 | $3,822,928 | -$3,742,938 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-19 of 19 reporting-owner rows connected to GRIFFON CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
19
Largest Forms 3/4/5 holder
Ronald J. Kramer
Net 12M change
-$14,783,505
Latest report
12 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Ronald J. Kramer | Chairman of the Board and CEO, Director | $172,139,883 | -$9,492,107 | -5.2% | Mixed | 12 Jun 2026 |
| Travis W. Cocke | Director, Other* | $87,385,385 | Mixed | 20 Feb 2024 | ||
| Robert F. Mehmel | President and COO | $77,248,262 | -$835,734 | -1.1% | Mixed | 12 Jun 2026 |
| Brian G. Harris | EVP, Chief Financial Officer | $14,723,018 | -$712,725 | -4.6% | Mixed | 11 Jun 2026 |
| Seth L. Kaplan | Sr VP, Gen. Counsel and Secy | $12,029,683 | -$1,431,664 | -11% | Mixed | 09 Feb 2026 |
| Henry A. Alpert | Director | $5,717,605 | +$79,990 | +1.4% | Filing P/S | 05 Mar 2026 |
| Kevin F. Sullivan | Director | $3,309,414 | Mixed | 18 Feb 2026 | ||
| Louis J. Grabowsky | Director | $3,227,470 | -$1,023,660 | -24% | Mixed | 18 Feb 2026 |
| W. Christopher Durborow | Vice President & CAO | $3,000,327 | -$919,700 | -23% | Mixed | 17 Feb 2026 |
| Robert G. Harrison | Director | $2,846,251 | Mixed | 03 Mar 2022 | ||
| Cheryl L. Turnbull | Director | $2,484,874 | Mixed | 18 Feb 2026 | ||
| Thomas Brosig | Director | $2,222,459 | Mixed | 03 Mar 2022 | ||
| Lacy M. Johnson | Director | $1,984,282 | Mixed | 18 Feb 2026 | ||
| Samanta Hegedus | Director | $1,955,167 | Mixed | 18 Feb 2026 | ||
| Victor Eugene Renuart | Director | $1,631,092 | Filing P/S | 20 Mar 2024 | ||
| Jerome L. Coben | Director | $1,460,203 | Mixed | 18 Feb 2026 | ||
| James W. Sight | Director | $1,141,508 | -$295,181 | -21% | Mixed | 18 Feb 2026 |
| H.c. Charles Diao | Director | $901,455 | Mixed | 18 Feb 2026 | ||
| Michelle L. Taylor | Director | $777,639 | -$152,724 | -16% | Mixed | 18 Feb 2026 |
Recent insider transactions for GRIFFON CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Robert F. Mehmel | GFF | Common Stock | Sale | -0.4% | $312,149 | $95.40 | -3,272 | 806,516 | 15 Jun 2026 | Direct |
| Robert F. Mehmel | GFF | Common Stock | Sale | -0.67% | $523,585 | $95.18 | -5,501 | 809,788 | 12 Jun 2026 | Direct |
| Ronald J. Kramer | GFF | Common Stock | Sale | -5.31% | $9,492,107 | $94.92 | -100,000 | 1,784,297 | 12 Jun 2026 | Direct |
| Brian G. Harris | GFF | Common Stock | Sale | -4.73% | $712,725 | $95.03 | -7,500 | 151,149 | 11 Jun 2026 | Direct |
| Henry A. Alpert | GFF | Common Stock | Purchase | 1.42% | $79,990 | $79.99 | 1,000 | 71,479 | 05 Mar 2026 | Direct |
| Louis J. Grabowsky | GFF | Common Stock | Award | 3.22% | 1,340 | 43,010 | 18 Feb 2026 | Direct | ||
| Lacy M. Johnson | GFF | Common Stock | Award | 5.34% | 1,340 | 26,443 | 18 Feb 2026 | Direct | ||
| Henry A. Alpert | GFF | Common Stock | Award | 1.94% | 1,340 | 70,479 | 18 Feb 2026 | Direct | ||
| Kevin F. Sullivan | GFF | Common Stock | Award | 3.13% | 1,340 | 44,102 | 18 Feb 2026 | Direct | ||
| James W. Sight | GFF | Common Stock | Award | 9.66% | 1,340 | 15,212 | 18 Feb 2026 | Direct | ||
| Samanta Hegedus | GFF | Common Stock | Award | 5.42% | 1,340 | 26,055 | 18 Feb 2026 | Direct | ||
| Cheryl L. Turnbull | GFF | Common Stock | Award | 4.23% | 1,340 | 33,039 | 18 Feb 2026 | Direct | ||
| Michelle L. Taylor | GFF | Common Stock | Award | 14.8% | 1,340 | 10,363 | 18 Feb 2026 | Direct | ||
| Jerome L. Coben | GFF | Common Stock | Award | 7.4% | 1,340 | 19,459 | 18 Feb 2026 | Direct | ||
| H.c. Charles Diao | GFF | Common Stock | Award | 12.6% | 1,340 | 12,013 | 18 Feb 2026 | Direct | ||
| W. Christopher Durborow | GFF | Common Stock | Sale | -25% | $919,700 | $91.97 | -10,000 | 29,963 | 17 Feb 2026 | Direct |
| Louis J. Grabowsky | GFF | Common Stock | Sale | -20.9% | $1,023,660 | $93.06 | -11,000 | 41,670 | 13 Feb 2026 | Direct |
| Michelle L. Taylor | GFF | Common Stock | Sale | -15.5% | $152,724 | $92.56 | -1,650 | 9,023 | 12 Feb 2026 | Direct |
| Seth L. Kaplan | GFF | Common Stock | Sale | -11.1% | $1,431,664 | $95.44 | -15,000 | 119,747 | 09 Feb 2026 | Direct |
| James W. Sight | GFF | Common Stock | Sale | -18.1% | $295,180 | $96.15 | -3,070 | 13,872 | 09 Feb 2026 | Direct |
| Ronald J. Kramer | GFF | Common Stock | Gift | -3.47% | -67,785 | 1,884,297 | 24 Dec 2025 | Direct | ||
| Seth L. Kaplan | GFF | Common Stock | Gift | -0.44% | -600 | 134,747 | 22 Dec 2025 | Direct | ||
| Henry A. Alpert | GFF | Common Stock | Gift | -3.02% | -2,150 | 69,139 | 04 Dec 2025 | Direct | ||
| Brian G. Harris | GFF | Common Stock | Tax liability | -4.58% | -7,610 | 158,649 | 30 Nov 2025 | Direct | ||
| Ronald J. Kramer | GFF | Common Stock | Tax liability | -3.66% | -74,079 | 1,952,082 | 30 Nov 2025 | Direct | ||
| Seth L. Kaplan | GFF | Common Stock | Tax liability | -6.18% | -8,921 | 135,347 | 30 Nov 2025 | Direct | ||
| W. Christopher Durborow | GFF | Common Stock | Tax liability | -9.8% | -4,343 | 39,963 | 30 Nov 2025 | Direct | ||
| Robert F. Mehmel | GFF | Common Stock | Tax liability | -3.2% | -26,928 | 815,289 | 30 Nov 2025 | Direct | ||
| Ronald J. Kramer | GFF | Common Stock | Award | 7.24% | 136,864 | 2,026,161 | 18 Nov 2025 | Direct | ||
| Robert F. Mehmel | GFF | Common Stock | Award | 8.84% | 68,432 | 842,217 | 18 Nov 2025 | Direct |
* marks a reported price that did not pass the local price check.