Griffon Corporation (GFF)
GFF moved a median of -0.14% 30 minutes after news, and -0.18% by the close. How GFF actually reacts to news — the realized, point-in-time move the market made, measured across 287 labeled events over the last three years with zero look-ahead.
GFF’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 45% | 286 |
| 30-min | -0.14% | 44% | 286 |
| 60-min | +0.09% | 53% | 286 |
| to close | -0.18% | 48% | 280 |
| Middle 50% of GFF reactions | -0.78% to +0.68% |
|---|---|
| Median reaction (30-min) | -0.14% |
| Measured reactions | 287 |
Half of all Griffon Corporation news events land between -0.78% and +0.68% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How GFF reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 20 | +0.45% | 55% | +0.45% |
| Analyst downgrades | 11 | +0.73% | 55% | -0.35% |
| Coverage initiations | 11 | -0.39% | 36% | +0.74% |
| Rating reiterations | 26 | +0.13% | 58% | -0.27% |
| Price-target raises | 10 | -0.21% | 50% | +0.03% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. 1 further class was observed with fewer than 10 measured events and is not published. See how GFF ranks against every other measured name →
That’s how GFF usually reacts — get an email when it moves on news →Email me when GFF moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to GFF's baseline. Nothing else.
Recent GFF events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Hunter Fan Company Expands Jasmine Roth Lighting Collection | Press release | GlobeNewswire | +0.34% | +0.55% | |
| Form 8-K GRIFFON CORP For: Aug 18 | SEC filing · Form 8-K | SEC EDGAR | +0.65% | -0.37% | |
| Griffon Corporation Announces Closing of Senior Notes Offering and Amended Credit Facility | Press release | Business Wire | -0.12% | -0.77% | |
| Form 8-K GRIFFON CORP For: Aug 10 | SEC filing · Form 8-K | SEC EDGAR | +0.01% | -1.98% | |
| Griffon Corporation Announces Pricing of $800 Million Senior Notes Offering | Press release | Business Wire | +0.85% | +0.85% | |
| Griffon Corporation Announces Senior Notes Offering | Press release | Business Wire | -2.19% | — | |
| Form 8-K GRIFFON CORP For: Aug 07 | SEC filing · Form 8-K | SEC EDGAR | -2.19% | — | |
| Form 10-Q GRIFFON CORP For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.53% | +2.16% | |
| Form 8-K GRIFFON CORP For: Aug 05 | SEC filing · Form 8-K | SEC EDGAR | +4.08% | +5.95% | |
| Griffon Corporation Announces Third Quarter Results | Press release | Business Wire | +4.08% | +5.95% | |
| Griffon Corporation Declares Quarterly Dividend | Press release | Business Wire | +4.08% | +5.95% | |
| Form 8-K GRIFFON CORP For: Jul 31 | SEC filing · Form 8-K | SEC EDGAR | -0.20% | +3.12% | |
| Griffon Corporation Announces Closing of AMES Australasia Transaction | Press release | Business Wire | -0.26% | +2.42% | |
| Griffon Corporation Schedules Conference Call To Discuss Third Quarter 2026 Financial Results | Press release | Business Wire | +0.99% | -1.19% | |
| Form 8-K GRIFFON CORP For: Jun 07 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +1.20% | |
| Griffon Corporation Announces Closing of Joint Venture with ONCAP to Combine AMES North America and Venanpri Tools | Press release | Business Wire | -0.20% | -1.58% | |
| ONCAP and Griffon Corporation Announce the Launch of Veritage Brands | Press release | Business Wire | -0.20% | -1.58% | |
| Griffon Corporation Enters Agreement to Form Joint Venture for AMES Australasia | Press release | Business Wire | +0.00% | +0.93% | |
| Form SD GRIFFON CORP | SEC filing · Form SD | SEC EDGAR | -0.18% | +1.63% | |
| Clopay® Introduces Switchable Glass Technology, Transforming Garage Doors into a Smart Architectural Feature | Press release | PR Newswire | -0.13% | +0.19% | |
| Form 10-Q GRIFFON CORP For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.47% | -3.52% | |
| Form 8-K GRIFFON CORP For: May 07 | SEC filing · Form 8-K | SEC EDGAR | +3.73% | +0.70% | |
| Griffon Corporation Announces Second Quarter Results | Press release | Business Wire | +3.73% | +0.70% | |
| Griffon Corporation Declares Quarterly Dividend | Press release | Business Wire | +3.73% | +0.70% | |
| Griffon Corporation Schedules Conference Call To Discuss Second Quarter 2026 Financial Results | Press release | Business Wire | +0.00% | +0.66% | |
| Clopay® Wins Best of IBS™ Award at 2026 International Builders' Show | Press release | PR Newswire | -0.26% | -0.65% | |
| Form 8-K GRIFFON CORP For: Feb 18 | SEC filing · Form 8-K | SEC EDGAR | -0.35% | -1.14% | |
| Form 10-Q GRIFFON CORP For: Dec 31 | SEC filing · Form 10-Q | SEC EDGAR | +1.26% | +5.41% | |
| Form 8-K GRIFFON CORP For: Feb 05 | SEC filing · Form 8-K | SEC EDGAR | +1.46% | +8.15% | |
| Griffon Corporation Announces First Quarter Results | Press release | Business Wire | +1.46% | +8.15% | |
| Griffon Corporation Declares Quarterly Dividend | Press release | Business Wire | +1.46% | +8.15% | |
| Griffon Corporation Taking Strategic Actions to Maximize Shareholder Value | Press release | Business Wire | +1.46% | +8.15% | |
| ONCAP and Griffon Corporation to Form Professional and Consumer Products Joint Venture | Press release | Business Wire | +1.46% | +8.15% | |
| Griffon Corporation Schedules Conference Call To Discuss First Quarter 2026 Financial Results | Press release | Business Wire | +0.17% | +0.07% | |
| Form ARS GRIFFON CORP For: Sep 30 | SEC filing · Form ARS | SEC EDGAR | -0.73% | +1.57% | |
| Form DEF 14A GRIFFON CORP For: Feb 18 | SEC filing · Form DEF | SEC EDGAR | -0.73% | +1.57% | |
| Form DEFA14A GRIFFON CORP | SEC filing · Form DEFA14A | SEC EDGAR | -0.73% | +1.57% | |
| Hunter Fan Company Leads Smart Home Revolution with Launch of HunterSMART™ Portfolio and ZenTech Smart Fan at Pepcom’s 2026 Digital Experience!? | Press release | GlobeNewswire | +0.00% | +0.36% | |
| Form 10-K GRIFFON CORP For: Sep 30 | SEC filing · Form 10-K | SEC EDGAR | +0.77% | -1.76% | |
| Form 8-K GRIFFON CORP For: Nov 19 | SEC filing · Form 8-K | SEC EDGAR | -3.83% | -2.34% | |
| Griffon Corporation Announces Annual and Fourth Quarter Results | Press release | Business Wire | -3.83% | -2.34% | |
| Griffon Corporation Declares Quarterly Dividend | Press release | Business Wire | -3.83% | -2.34% | |
| Griffon Corporation Schedules Conference Call To Discuss Fourth Quarter 2025 Financial Results | Press release | Business Wire | +0.13% | — | |
| Clopay® Earns 2025 Partner of the Year Award from The Home Depot® | Press release | PR Newswire | -0.11% | -0.29% | |
| Form 10-Q GRIFFON CORP For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.21% | -6.40% | |
| Form 8-K GRIFFON CORP For: Aug 06 | SEC filing · Form 8-K | SEC EDGAR | -1.40% | -4.17% | |
| Griffon Corporation Announces Third Quarter Results | Press release | Business Wire | -1.40% | -4.17% | |
| Griffon Corporation Declares Quarterly Dividend | Press release | Business Wire | -1.40% | -4.17% | |
| Griffon Corporation Schedules Conference Call To Discuss Third Quarter 2025 Financial Results | Press release | Business Wire | +0.70% | +0.31% | |
| Form SD GRIFFON CORP | SEC filing · Form SD | SEC EDGAR | -0.36% | +0.19% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the GFF section they belong to.
Where else GFF is measured.
GFF earnings → · Analyst actions → · SEC filings →
Other Basic Materials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| GOLDCORP INC (G_TSE) | 288 | +0.11% | 54% |
| Trilogy Metals Inc. (TMQ) | 288 | 0.00% | 46% |
| ENERTOPIA CORP (ENRT) | 281 | 0.00% | 41% |
| Glatfelter Corporation (GLT) | 281 | 0.00% | 47% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Basic Materials names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Griffon Corporation's median reaction calculated?
Every labeled GFF news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 287 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 44% of GFF's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does GFF's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.