Synlogic, Inc. (SYBX)
SYBX moved a median of +0.29% 30 minutes after news, and 0.00% by the close. How SYBX actually reacts to news — the realized, point-in-time move the market made, measured across 111 labeled events over the last three years with zero look-ahead.
SYBX’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 45% | 80 |
| 30-min | +0.29% | 53% | 89 |
| 60-min | 0.00% | 46% | 94 |
| to close | 0.00% | 47% | 107 |
| Middle 50% of SYBX reactions | -1.09% to +2.68% |
|---|---|
| Median reaction (30-min) | +0.29% |
| Measured reactions | 111 |
Half of all Synlogic, Inc. news events land between -1.09% and +2.68% 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 SYBX moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to SYBX's baseline. Nothing else.
Recent SYBX events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 10-Q SYNLOGIC, INC. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +0.00% | |
| SYBX Stock Alert: Halper Sadeh LLC is Investigating Whether Synlogic, Inc. is Obtaining a Fair Price for its Shareholders | Press release | Business Wire | +0.00% | — | |
| Form 8-K SYNLOGIC, INC. For: Jul 27 | SEC filing · Form 8-K | SEC EDGAR | +1.75% | -1.75% | |
| Synlogic and Caldera Therapeutics Announce Merger Agreement and Concurrent Private Placement | Press release | Business Wire | +1.75% | -1.75% | |
| Form 10-Q SYNLOGIC, INC. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +1.54% | |
| Form 10-K/A SYNLOGIC, INC. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.00% | +0.00% | |
| Form 10-K SYNLOGIC, INC. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.00% | +0.00% | |
| Form 8-K/A SYNLOGIC, INC. For: Jan 16 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.20% | |
| Form 8-K SYNLOGIC, INC. For: Jan 16 | SEC filing · Form 8-K | SEC EDGAR | -2.16% | -27.91% | |
| Form 8-K SYNLOGIC, INC. For: Dec 15 | SEC filing · Form 8-K | SEC EDGAR | — | +0.95% | |
| Form 8-K SYNLOGIC, INC. For: Nov 21 | SEC filing · Form 8-K | SEC EDGAR | — | -10.43% | |
| Form ARS SYNLOGIC, INC. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +2.44% | — | |
| Form DEF 14A SYNLOGIC, INC. For: Dec 15 | SEC filing · Form DEF | SEC EDGAR | +2.44% | — | |
| Form EFFECT SYNLOGIC, INC. | SEC filing · Form EFFECT | SEC EDGAR | — | -0.71% | |
| Form S-3/A SYNLOGIC, INC. | SEC filing · Form S-3 | SEC EDGAR | +2.70% | -3.38% | |
| Form S-3 SYNLOGIC, INC. | SEC filing · Form S-3 | SEC EDGAR | +0.00% | +0.73% | |
| Form 10-Q SYNLOGIC, INC. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +2.26% | +5.26% | |
| Form 10-Q SYNLOGIC, INC. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | — | +0.90% | |
| Form 10-K/A SYNLOGIC, INC. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | — | +0.00% | |
| Form 10-K SYNLOGIC, INC. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | — | -2.95% | |
| Form 8-K SYNLOGIC, INC. For: Feb 20 | SEC filing · Form 8-K | SEC EDGAR | — | +0.01% | |
| Form 8-K SYNLOGIC, INC. For: Jan 10 | SEC filing · Form 8-K | SEC EDGAR | -2.10% | +2.10% | |
| Form 8-K SYNLOGIC, INC. For: Dec 17 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -1.31% | |
| Form 8-K SYNLOGIC, INC. For: Dec 04 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +2.17% | |
| Form 10-Q SYNLOGIC, INC. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | — | +0.72% | |
| Form 8-K SYNLOGIC, INC. For: Nov 12 | SEC filing · Form 8-K | SEC EDGAR | — | +0.72% | |
| Form S-8 SYNLOGIC, INC. | SEC filing · Form S-8 | SEC EDGAR | — | +0.72% | |
| Synlogic Reports Third Quarter 2024 Financial Results | Press release | GlobeNewswire | — | +0.72% | |
| Form DEF 14A SYNLOGIC, INC. For: Dec 04 | SEC filing · Form DEF | SEC EDGAR | +0.00% | +2.88% | |
| Form ARS SYNLOGIC, INC. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | — | +0.69% | |
| Form 10-Q SYNLOGIC, INC. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | — | -2.48% | |
| Form 8-K SYNLOGIC, INC. For: Aug 08 | SEC filing · Form 8-K | SEC EDGAR | — | -2.48% | |
| Synlogic Reports Second Quarter 2024 Financial Results | Press release | GlobeNewswire | — | -2.48% | |
| Form 10-Q SYNLOGIC, INC. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.57% | +0.00% | |
| Form 8-K SYNLOGIC, INC. For: May 14 | SEC filing · Form 8-K | SEC EDGAR | +0.57% | +0.00% | |
| Synlogic Reports First Quarter 2024 Financial Results | Press release | GlobeNewswire | +0.57% | +0.00% | |
| Form 10-K/A SYNLOGIC, INC. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | — | -4.79% | |
| Form 8-K SYNLOGIC, INC. For: Mar 19 | SEC filing · Form 8-K | SEC EDGAR | — | +2.86% | |
| Form 10-K SYNLOGIC, INC. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.00% | -6.81% | |
| Form 8-K SYNLOGIC, INC. For: Mar 19 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -6.81% | |
| Synlogic Reports Fourth Quarter and Full Year 2023 Financial Results | Press release | GlobeNewswire | +0.00% | -6.81% | |
| Form 8-K SYNLOGIC, INC. For: Feb 17 | SEC filing · Form 8-K | SEC EDGAR | -3.76% | +2.69% | |
| Form 8-A12B SYNLOGIC, INC. | SEC filing · Form 8-A12B | SEC EDGAR | -1.63% | +7.07% | |
| Form 8-K SYNLOGIC, INC. For: Feb 20 | SEC filing · Form 8-K | SEC EDGAR | -1.63% | +7.07% | |
| Synlogic Adopts Limited Duration Stockholders Rights Plan | Press release | GlobeNewswire | +1.77% | +2.22% | |
| Form 8-K SYNLOGIC, INC. For: Feb 12 | SEC filing · Form 8-K | SEC EDGAR | +0.81% | +9.43% | |
| Synlogic Announces Decision to Discontinue Synpheny-3 Study and Provides Corporate Update | Press release | GlobeNewswire | +0.62% | +9.94% | |
| Synlogic Announces Publication of Preclinical and Clinical Data for SYNB1353 as a Potential Treatment for Classical Homocystinuria | Press release | GlobeNewswire | -1.14% | -1.43% | |
| Synlogic Provides Corporate Update and Outlook for 2024 | Press release | GlobeNewswire | -1.05% | -4.60% | |
| Form 8-K SYNLOGIC, INC. For: Dec 29 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +14.91% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the SYBX section they belong to.
Where else SYBX is measured.
SYBX earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Taro Pharmaceutical Industries Ltd. Ordinary Shares (TARO) | 112 | -0.05% | 43% |
| EVOFEM BIOSCIENCE INC (EVFM) | 111 | 0.00% | 29% |
| Aptose Biosciences Inc (APS_TSE) | 110 | 0.00% | 23% |
| DYNATRONICS CORP (DYNT) | 110 | 0.00% | 30% |
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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How the numbers are made.
How is Synlogic, Inc.'s median reaction calculated?
Every labeled SYBX 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 111 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. 53% of SYBX'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 SYBX'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.