Greenestone Healthcare Corporation (GRST)
GRST moved a median of 0.00% 30 minutes after news, and 0.00% by the close. How GRST actually reacts to news — the realized, point-in-time move the market made, measured across 56 labeled events over the last three years with zero look-ahead.
GRST’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 15% | 34 |
| 30-min | 0.00% | 26% | 39 |
| 60-min | 0.00% | 23% | 44 |
| to close | 0.00% | 33% | 52 |
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when GRST moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to GRST's baseline. Nothing else.
Recent GRST events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form NT 10-Q ETHEMA HEALTH Corp For: Jun 30 | SEC filing · Form NT | SEC EDGAR | — | — | |
| Form 10-K ETHEMA HEALTH Corp For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | — | — | |
| Form NT 10-Q ETHEMA HEALTH Corp For: Mar 31 | SEC filing · Form NT | SEC EDGAR | — | +0.00% | |
| Form NT 10-K ETHEMA HEALTH Corp For: Dec 31 | SEC filing · Form NT | SEC EDGAR | — | +0.00% | |
| Form NT 10-K ETHEMA HEALTH Corp For: Dec 31 | SEC filing · Form NT | SEC EDGAR | +0.00% | +0.00% | |
| Ethema Health to Present at the Small Cap Growth Virtual Investor Conference December 9th | Press release | GlobeNewswire | +0.00% | +0.00% | |
| Form 10-Q ETHEMA HEALTH Corp For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +0.00% | |
| Form NT 10-Q ETHEMA HEALTH Corp For: Sep 30 | SEC filing · Form NT | SEC EDGAR | — | +0.00% | |
| Form 10-Q ETHEMA HEALTH Corp For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +0.00% | |
| Form 10-Q ETHEMA HEALTH Corp For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | — | +0.00% | |
| Form 10-K ETHEMA HEALTH Corp For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.00% | +33.33% | |
| Form NT 10-Q ETHEMA HEALTH Corp For: Mar 31 | SEC filing · Form NT | SEC EDGAR | — | +33.33% | |
| Form NT 10-K ETHEMA HEALTH Corp For: Dec 31 | SEC filing · Form NT | SEC EDGAR | +0.00% | -11.11% | |
| Form 8-K ETHEMA HEALTH Corp For: Jan 09 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.00% | |
| Form DEF 14C ETHEMA HEALTH Corp For: Jan 22 | SEC filing · Form DEF | SEC EDGAR | +0.00% | +0.00% | |
| Ethema to Present at Microcap Conference in Atlantic City on January 28-30, 2025 | Press release | Accesswire | +0.00% | +66.67% | |
| Form 8-K ETHEMA HEALTH Corp For: Jan 09 | SEC filing · Form 8-K | SEC EDGAR | -25.00% | +0.00% | |
| Form PRE 14C ETHEMA HEALTH Corp For: Jan 10 | SEC filing · Form PRE | SEC EDGAR | -25.00% | +0.00% | |
| Form 10-Q ETHEMA HEALTH Corp For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +0.00% | |
| Form 8-K ETHEMA HEALTH Corp For: Oct 22 | SEC filing · Form 8-K | SEC EDGAR | +33.33% | +16.67% | |
| Addiction Recovery Institute of America ("ARIA") receives Full License for Inpatient Detoxification and Residential Level 1 at its Boca Raton facility | Press release | PR Newswire | — | +0.00% | |
| Ethema signs binding asset purchase agreement for all of the business assets of Edgewater Recovery Center LLC | Press release | PR Newswire | +14.29% | +0.00% | |
| Form 10-Q ETHEMA HEALTH Corp For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -2.78% | |
| Form NT 10-Q ETHEMA HEALTH Corp For: Jun 30 | SEC filing · Form NT | SEC EDGAR | — | +0.00% | |
| Ethema Receives License for its Boca Raton facility | Press release | PR Newswire | — | +0.00% | |
| "Ethema Health Corporation" to Present on the Emerging Growth Healthcare Conference on July 18, 2024 | Press release | PR Newswire | -7.14% | +0.00% | |
| Ethema signs LOI to purchase Edgewater Recovery Center LLC | Press release | PR Newswire | +16.67% | +16.67% | |
| Form 8-K ETHEMA HEALTH Corp For: Jul 08 | SEC filing · Form 8-K | SEC EDGAR | +16.67% | +16.67% | |
| Form 8-K ETHEMA HEALTH Corp For: Jun 12 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -16.67% | |
| Form 10-Q ETHEMA HEALTH Corp For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +16.67% | |
| Form NT 10-Q ETHEMA HEALTH Corp For: Mar 31 | SEC filing · Form NT | SEC EDGAR | +0.00% | +0.00% | |
| Form 10-K ETHEMA HEALTH Corp For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | — | — | |
| Form NT 10-K ETHEMA HEALTH Corp For: Dec 31 | SEC filing · Form NT | SEC EDGAR | +0.00% | -25.00% | |
| Form 8-K ETHEMA HEALTH Corp For: Feb 01 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -11.11% | |
| Ethema to Present an Update at the Emerging Growth Conference on February 8, 2024 | Press release | GlobeNewswire | +0.00% | -16.67% | |
| Ethema to Present at the Emerging Growth Conference on January 10, 2024 | Press release | GlobeNewswire | — | +0.00% | |
| Form 8-K/A ETHEMA HEALTH Corp For: Oct 16 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -14.29% | |
| Ethema Releases Profitable Quarterly Results | Press release | GlobeNewswire | — | +20.00% | |
| Form 10-Q ETHEMA HEALTH Corp For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +20.00% | |
| Form NT 10-Q ETHEMA HEALTH Corp For: Sep 30 | SEC filing · Form NT | SEC EDGAR | +0.00% | -20.00% | |
| Form QUALIF ETHEMA HEALTH Corp | SEC filing · Form QUALIF | SEC EDGAR | +0.00% | +0.00% | |
| Ethema Health Comments on Director O'Bireck Passing | Press release | GlobeNewswire | — | +0.00% | |
| Form 1-A POS ETHEMA HEALTH Corp | SEC filing · Form 1-A | SEC EDGAR | — | +16.67% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the GRST section they belong to.
Where else GRST is measured.
GRST earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| CANNAPHARMARX INC (CPMD) | 56 | 0.00% | 29% |
| GN STORE NORD A/S ADR (GNNDY) | 56 | 0.00% | 34% |
| PRAXSYN CORP (PXYN) | 56 | 0.00% | 42% |
| Syneos Health, Inc. - Class A (SYNH) | 56 | -0.01% | 14% |
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 Healthcare names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Greenestone Healthcare Corporation's median reaction calculated?
Every labeled GRST 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 56 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. 26% of GRST'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 GRST'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.