Brian G. Harris is CFO & VP at GRIFFON CORP (GFF). They have made 10 open-market trades across 1 company since 2010, most recently 2026-08-07.
CIK 0001470077
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
3 open-market purchases totalling $114K since 2010, against 7 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| GFF | 128,649 | $11.9M |
Shares reported on the most recent Form 4, priced at the 2026-08-11 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| GFF | SELL | 2026-08-07 | 2026-08-11 | $107.11 | $564K | -4.3% | -9.3% | — |
| GFF | SELL | 2026-08-05 | 2026-08-07 | $103.27 | $1.1M | +0.1% | -5.5% | — |
| GFF | SELL | 2026-06-30 | 2026-07-02 | $98.01 | $606K | +1.1% | -1.6% | +2.8% |
| GFF | SELL | 2026-06-11 | 2026-06-15 | $95.03 | $713K | +1.4% | -3.6% | -1.7% |
| GFF | SELL | 2024-12-02 | 2024-12-03 | $82.60 | $3.1M | -4.8% | -12.7% | -15.4% |
| GFF | SELL | 2024-09-17 | 2024-09-19 | $67.65 | $787K | -0.5% | -6.0% | +3.4% |
| GFF | SELL | 2024-09-13 | 2024-09-17 | $66.13 | $897K | +2.6% | +0.5% | +16.0% |
| GFF | BUY | 2018-12-03 | 2018-12-06 | $11.73 | $47K | -7.1% | -2.1% | +51.0% |
| GFF | BUY | 2018-11-23 | 2018-11-27 | $11.80 | $24K | -11.7% | -18.1% | +48.6% |
| GFF | BUY | 2010-06-04 | 2010-06-08 | $10.93 | $44K | -7.2% | -2.0% | -2.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.