Hydrofarm Holdings Group, Inc. (HYFM)
HYFM moved a median of 0.00% 30 minutes after news, and -1.34% by the close. How HYFM actually reacts to news — the realized, point-in-time move the market made, measured across 185 labeled events over the last three years with zero look-ahead.
HYFM’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 39% | 170 |
| 30-min | 0.00% | 48% | 178 |
| 60-min | +0.01% | 51% | 178 |
| to close | -1.34% | 44% | 182 |
| Middle 50% of HYFM reactions | -2.23% to +2.67% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 185 |
Half of all Hydrofarm Holdings Group, Inc. news events land between -2.23% and +2.67% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when HYFM moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to HYFM's baseline. Nothing else.
Recent HYFM events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 8-K HYDROFARM HOLDINGS GROUP For: Oct 05 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -19.15% | |
| Form 10-Q HYDROFARM HOLDINGS GROUP For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -4.10% | -14.38% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Aug 14 | SEC filing · Form 8-K | SEC EDGAR | -4.10% | -14.38% | |
| Hydrofarm Holdings Group Announces Second Quarter 2026 Results | Press release | GlobeNewswire | -4.10% | -14.38% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Jul 31 | SEC filing · Form 8-K | SEC EDGAR | +0.40% | -11.60% | |
| Hydrofarm Completes Sale of Aurora Peat Products and Launches Project Agility to Scale Its Logistics Services Platform | Press release | GlobeNewswire | -4.82% | -30.87% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Jul 02 | SEC filing · Form 8-K | SEC EDGAR | +6.44% | +5.65% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Jun 23 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +5.07% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Jun 16 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +8.27% | |
| Form DEFA14A HYDROFARM HOLDINGS GROUP | SEC filing · Form DEFA14A | SEC EDGAR | -0.20% | -1.91% | |
| Form 10-Q HYDROFARM HOLDINGS GROUP For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -1.94% | -2.91% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: May 15 | SEC filing · Form 8-K | SEC EDGAR | -1.94% | -2.91% | |
| Hydrofarm Holdings Group Announces First Quarter 2026 Results | Press release | GlobeNewswire | -1.94% | -2.91% | |
| Form ARS HYDROFARM HOLDINGS GROUP For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +2.91% | +16.50% | |
| Form DEF 14A HYDROFARM HOLDINGS GROUP For: Jun 23 | SEC filing · Form DEF | SEC EDGAR | +2.91% | +16.50% | |
| Form DEFA14A HYDROFARM HOLDINGS GROUP | SEC filing · Form DEFA14A | SEC EDGAR | +2.91% | +16.50% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Apr 14 | SEC filing · Form 8-K | SEC EDGAR | +2.36% | +1.06% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Apr 08 | SEC filing · Form 8-K | SEC EDGAR | -5.16% | -4.12% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Apr 01 | SEC filing · Form 8-K | SEC EDGAR | -0.49% | -3.48% | |
| Form 10-K HYDROFARM HOLDINGS GROUP For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -2.68% | -9.55% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Mar 27 | SEC filing · Form 8-K | SEC EDGAR | -2.68% | -9.55% | |
| Hydrofarm Holdings Group Announces Fourth Quarter and Full Year 2025 Results | Press release | GlobeNewswire | -2.68% | -9.55% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Feb 17 | SEC filing · Form 8-K | SEC EDGAR | -1.47% | -2.94% | |
| Form EFFECT HYDROFARM HOLDINGS GROUP | SEC filing · Form EFFECT | SEC EDGAR | -1.45% | -4.38% | |
| Form 10-Q HYDROFARM HOLDINGS GROUP For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -6.07% | -14.29% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Nov 12 | SEC filing · Form 8-K | SEC EDGAR | -6.07% | -14.29% | |
| Form S-3 HYDROFARM HOLDINGS GROUP | SEC filing · Form S-3 | SEC EDGAR | -6.07% | -14.29% | |
| Hydrofarm Holdings Group Announces Third Quarter 2025 Results | Press release | GlobeNewswire | -6.07% | -14.29% | |
| Hydrofarm Holdings Group, Inc. to Announce Third Quarter 2025 Results on November 12, 2025 | Press release | GlobeNewswire | -3.60% | -12.80% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Sep 29 | SEC filing · Form 8-K | SEC EDGAR | — | -7.49% | |
| Hydrofarm Announces Changes to its Board of Directors | Press release | GlobeNewswire | — | -7.49% | |
| Form 10-Q HYDROFARM HOLDINGS GROUP For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | — | — | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Aug 12 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Hydrofarm Holdings Group Announces Second Quarter 2025 Results | Press release | GlobeNewswire | — | — | |
| Hydrofarm Holdings Group, Inc. to Announce Second Quarter 2025 Results on August 12, 2025 | Press release | GlobeNewswire | — | +1.17% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Jun 09 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -7.49% | |
| Form DEFA14A HYDROFARM HOLDINGS GROUP | SEC filing · Form DEFA14A | SEC EDGAR | — | -2.18% | |
| Form 10-Q HYDROFARM HOLDINGS GROUP For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -0.26% | -12.89% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: May 13 | SEC filing · Form 8-K | SEC EDGAR | -0.26% | -12.89% | |
| Hydrofarm Holdings Group Announces First Quarter 2025 Results | Press release | GlobeNewswire | -0.26% | -12.89% | |
| Hydrofarm Holdings Group, Inc. to Announce First Quarter 2025 Results on May 13, 2025 | Press release | GlobeNewswire | +1.43% | +7.79% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Apr 15 | SEC filing · Form 8-K | SEC EDGAR | -4.05% | -6.48% | |
| Form ARS HYDROFARM HOLDINGS GROUP For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -4.05% | -6.48% | |
| Form DEF 14A HYDROFARM HOLDINGS GROUP For: Jun 09 | SEC filing · Form DEF | SEC EDGAR | -4.05% | -6.48% | |
| Form DEFA14A HYDROFARM HOLDINGS GROUP | SEC filing · Form DEFA14A | SEC EDGAR | -4.05% | -6.48% | |
| Form 10-K HYDROFARM HOLDINGS GROUP For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +1.09% | -21.09% | |
| Form 8-K HYDROFARM HOLDINGS GROUP For: Mar 05 | SEC filing · Form 8-K | SEC EDGAR | +1.09% | -21.09% | |
| Form S-8 HYDROFARM HOLDINGS GROUP | SEC filing · Form S-8 | SEC EDGAR | +1.09% | -21.09% | |
| Hydrofarm Holdings Group Announces Fourth Quarter and Full Year 2024 Results | Press release | GlobeNewswire | +1.09% | -21.09% | |
| Hydrofarm Holdings Group, Inc. to Announce Fourth Quarter and Full Year 2024 Results on March 5, 2025 | Press release | GlobeNewswire | -2.37% | -0.86% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the HYFM section they belong to.
Where else HYFM is measured.
HYFM earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Hydrofarm Holdings Group, Inc.'s median reaction calculated?
Every labeled HYFM 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 185 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. 48% of HYFM'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 HYFM'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.