Athersys, Inc. (ATHX)
ATHX moved a median of -0.23% 30 minutes after news, and -3.23% by the close. How ATHX actually reacts to news — the realized, point-in-time move the market made, measured across 31 labeled events over the last three years with zero look-ahead.
ATHX’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.95% | 32% | 28 |
| 30-min | -0.23% | 41% | 29 |
| 60-min | -4.02% | 38% | 29 |
| to close | -3.23% | 38% | 29 |
| Middle 50% of ATHX reactions | -4.76% to +4.29% |
|---|---|
| Median reaction (30-min) | -0.23% |
| Measured reactions | 31 |
Half of all Athersys, Inc. news events land between -4.76% and +4.29% 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 ATHX moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ATHX's baseline. Nothing else.
Recent ATHX events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 8-K ATHERSYS, INC / NEW For: Apr 01 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form NT 10-K ATHERSYS, INC / NEW For: Dec 31 | SEC filing · Form NT | SEC EDGAR | — | — | |
| Form 8-K ATHERSYS, INC / NEW For: Jan 05 | SEC filing · Form 8-K | SEC EDGAR | -6.78% | -23.73% | |
| Form 8-K ATHERSYS, INC / NEW For: Dec 20 | SEC filing · Form 8-K | SEC EDGAR | -7.69% | -11.54% | |
| Form EFFECT ATHERSYS, INC / NEW | SEC filing · Form EFFECT | SEC EDGAR | +2.94% | +2.06% | |
| Form S-1/A ATHERSYS, INC / NEW | SEC filing · Form S-1 | SEC EDGAR | +9.76% | +21.95% | |
| Athersys Reports Third Quarter 2023 Financial Results and Business Highlights | Press release | Business Wire | -0.23% | -12.00% | |
| Form 10-Q ATHERSYS, INC / NEW For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.23% | -12.00% | |
| Form NT 10-Q ATHERSYS, INC / NEW For: Sep 30 | SEC filing · Form NT | SEC EDGAR | +1.60% | +3.80% | |
| Form S-1 ATHERSYS, INC / NEW | SEC filing · Form S-1 | SEC EDGAR | +29.96% | +21.14% | |
| Form 8-K ATHERSYS, INC / NEW For: Oct 30 | SEC filing · Form 8-K | SEC EDGAR | +0.50% | +16.33% | |
| Thinking about buying stock in XORTX Therapeutics, Tempest Therapeutics, Ginkgo Bioworks Holdings, Athersys, or Textainer Group Holdings? | Press release | PR Newswire | -2.92% | -27.92% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ATHX section they belong to.
Where else ATHX is measured.
ATHX earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Radius Recycling, Inc. - Class A (RDUS) | 32 | -0.14% | 38% |
| Ares Acquisition Corporation III (AAC) | 31 | 0.00% | 50% |
| Premier Biomedical Inc (BIEI) | 31 | 0.00% | 42% |
| BIONOMIC LTD PAR ORD (BNOEF) | 31 | 0.00% | 32% |
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 →
Every ticker we measure the same way24
Apple (AAPL)
How AAPL actually reacts to news, measured.
NVIDIA (NVDA)
How NVDA actually reacts to news, measured.
Tesla (TSLA)
How TSLA actually reacts to news, measured.
Microsoft (MSFT)
How MSFT actually reacts to news, measured.
Advanced Micro Devices (AMD)
How AMD actually reacts to news, measured.
Amazon (AMZN)
How AMZN actually reacts to news, measured.
Alphabet (GOOG)
How GOOG actually reacts to news, measured.
Meta Platforms (META)
How META actually reacts to news, measured.
Broadcom (AVGO)
How AVGO actually reacts to news, measured.
JPMorgan Chase (JPM)
How JPM actually reacts to news, measured.
Visa (V)
How V actually reacts to news, measured.
Walmart (WMT)
How WMT actually reacts to news, measured.
Eli Lilly (LLY)
How LLY actually reacts to news, measured.
UnitedHealth Group (UNH)
How UNH actually reacts to news, measured.
Netflix (NFLX)
How NFLX actually reacts to news, measured.
Johnson & Johnson (JNJ)
How JNJ actually reacts to news, measured.
Exxon Mobil (XOM)
How XOM actually reacts to news, measured.
Home Depot (HD)
How HD actually reacts to news, measured.
Costco (COST)
How COST actually reacts to news, measured.
Mastercard (MA)
How MA actually reacts to news, measured.
Oracle (ORCL)
How ORCL actually reacts to news, measured.
Salesforce (CRM)
How CRM actually reacts to news, measured.
Bank of America (BAC)
How BAC actually reacts to news, measured.
Coca-Cola (KO)
How KO actually reacts to news, measured.
Walt Disney (DIS)
How DIS actually reacts to news, measured.
Browse all tickers
Every name we’ve measured, in one place.
How the numbers are made.
How is Athersys, Inc.'s median reaction calculated?
Every labeled ATHX 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 31 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. 41% of ATHX'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 ATHX'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.