Griffon Corporation
Ownership
Ownership Structure
Who owns Griffon Corporation (GFF)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 92.1% of the shares are freely tradable; institutional investors hold 81.0%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 13.16 | 5,962,365 | +0.5 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 8.27 | 3,745,114 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.24 | 1,918,661 | +0.0 | 03/31/2026 |
| Voss Capital LLC | 3.35 | 1,516,857 | -16.9 | 06/30/2026 |
| State Street Corp | 3.31 | 1,499,356 | -2.4 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.19 | 2,348,541 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.06 | 1,387,919 | +0.4 | 07/31/2026 |
| FullerThaler Beh Small-Cap Equity SMA | 2.27 | 1,027,994 | +7.5 | 06/30/2026 |
| FullerThaler Behavioral Small-Cap Equity | 2.27 | 1,027,994 | +7.5 | 06/30/2026 |
| FullerThaler Behavioral Sm-Cp Eq R6 | 2.27 | 1,027,994 | +7.5 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Kramer Ronald J | Chairman of the Board and CEO | 1,684,297 | 156,976,480 $ | Aug 5, 2026 | direct |
| Mehmel Robert F | President and COO | 723,032 | 67,386,582 $ | Aug 11, 2026 | direct |
| Harris Brian G | EVP, Chief Financial Officer | 128,649 | 11,990,087 $ | Aug 7, 2026 | direct |
| Sullivan Kevin F | Director | 40,602 | 3,784,106 $ | Aug 13, 2026 | direct |
| Turnbull Cheryl L | Director | 30,039 | 2,799,635 $ | Aug 13, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 13, 2026 | Turnbull Cheryl L | Director | Sell | 3,000 | 106.12 | 318,360 |
| Aug 13, 2026 | Sullivan Kevin F | Director | Sell | 3,500 | 105.59 | 369,565 |
| Aug 11, 2026 | Mehmel Robert F | President and COO | Sell | 3,240 | 107.16 | 347,198 |
| Aug 10, 2026 | Mehmel Robert F | President and COO | Sell | 88 | 105.21 | 9,258 |
| Aug 10, 2026 | Mehmel Robert F | President and COO | Sell | 2,913 | 104.64 | 304,816 |
| Aug 10, 2026 | Mehmel Robert F | President and COO | Sell | 3,638 | 104.08 | 378,643 |
| Aug 7, 2026 | Mehmel Robert F | President and COO | Sell | 553 | 108.09 | 59,774 |
| Aug 7, 2026 | Mehmel Robert F | President and COO | Sell | 13,464 | 107.43 | 1,446,438 |
| Aug 7, 2026 | Mehmel Robert F | President and COO | Sell | 1,911 | 106.60 | 203,713 |
| Aug 7, 2026 | Harris Brian G | EVP, Chief Financial Officer | Sell | 5,267 | 107.11 | 564,148 |
| Aug 6, 2026 | Mehmel Robert F | President and COO | Sell | 2,074 | 106.27 | 220,404 |
| Aug 6, 2026 | Mehmel Robert F | President and COO | Sell | 6,933 | 105.46 | 731,154 |
| Aug 6, 2026 | Mehmel Robert F | President and COO | Sell | 5,476 | 104.56 | 572,571 |
| Aug 6, 2026 | Mehmel Robert F | President and COO | Sell | 211 | 103.52 | 21,843 |
| Aug 6, 2026 | Mehmel Robert F | President and COO | Sell | 158 | 102.03 | 16,121 |
| Aug 5, 2026 | Harris Brian G | EVP, Chief Financial Officer | Sell | 2,233 | 104.01 | 232,254 |
| Aug 5, 2026 | Harris Brian G | EVP, Chief Financial Officer | Sell | 8,817 | 103.08 | 908,856 |
| Aug 5, 2026 | Kramer Ronald J | Chairman of the Board and CEO | Sell | 8,120 | 104.27 | 846,672 |
| Aug 5, 2026 | Kramer Ronald J | Chairman of the Board and CEO | Sell | 16,402 | 103.37 | 1,695,475 |
| Aug 5, 2026 | Kramer Ronald J | Chairman of the Board and CEO | Sell | 45,240 | 102.63 | 4,642,981 |
| Aug 5, 2026 | Kramer Ronald J | Chairman of the Board and CEO | Sell | 17,322 | 101.58 | 1,759,569 |
| Aug 5, 2026 | Kramer Ronald J | Chairman of the Board and CEO | Sell | 12,916 | 100.44 | 1,297,283 |
| Aug 5, 2026 | Mehmel Robert F | President and COO | Sell | 2,217 | 104.12 | 230,834 |
| Aug 5, 2026 | Mehmel Robert F | President and COO | Sell | 5,434 | 103.53 | 562,582 |
| Aug 5, 2026 | Mehmel Robert F | President and COO | Sell | 5,341 | 102.59 | 547,933 |
| Aug 5, 2026 | Mehmel Robert F | President and COO | Sell | 2,790 | 101.44 | 283,018 |
| Aug 5, 2026 | Mehmel Robert F | President and COO | Sell | 3,527 | 100.46 | 354,322 |
| Aug 5, 2026 | Mehmel Robert F | President and COO | Sell | 2,283 | 99.67 | 227,547 |
| Aug 5, 2026 | Mehmel Robert F | President and COO | Sell | 617 | 98.68 | 60,886 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.