Ostin Technology Group Co., Ltd. - Class A Ordinary Shares (OST)
OST moved a median of -0.48% 30 minutes after news, and -1.06% by the close. How OST actually reacts to news — the realized, point-in-time move the market made, measured across 330 labeled events over the last three years with zero look-ahead.
OST’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 38% | 74 |
| 30-min | -0.48% | 32% | 81 |
| 60-min | -1.33% | 25% | 83 |
| to close | -1.06% | 39% | 87 |
| Middle 50% of OST reactions | -2.72% to +0.94% |
|---|---|
| Median reaction (30-min) | -0.48% |
| Measured reactions | 330 |
Half of all Ostin Technology Group Co., Ltd. - Class A Ordinary Shares news events land between -2.72% and +0.94% 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 OST moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to OST's baseline. Nothing else.
Recent OST events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 6-K Ostin Technology Group For: Mar 31 | SEC filing · Form 6-K | SEC EDGAR | — | — | |
| SUEWALLST, LLP: OST FRAUD TIMELINE REVEALS 73-DAY PATH TO $950M INVESTOR WIPEOUT | Press release | PR Newswire | — | — | |
| Form 6-K Ostin Technology Group For: Apr 01 | SEC filing · Form 6-K | SEC EDGAR | — | — | |
| SUEWALLST, LLP: OST FRAUD TIMELINE REVEALS 73-DAY PATH TO $950M INVESTOR WIPEOUT | Press release | PR Newswire | — | — | |
| OST'S $0.06 SHARES SOLD AS $9.40 WINNERS -- INVESTORS LOST 94%: SUEWALLST, LLP | Press release | PR Newswire | — | — | |
| OST'S $0.06 SHARES SOLD AS $9.40 WINNERS -- INVESTORS LOST 94%: SUEWALLST | Press release | PR Newswire | — | — | |
| OST INVESTOR LOSSES MOUNT AS SENTIMENT SHIFTS FROM OPTIMISM TO DEVASTATION -- SUEWALLST | Press release | PR Newswire | — | — | |
| Shareholders who lost money in shares of Ostin Technology Group Co., Ltd. (NASDAQ: OST) should contact Wolf Haldenstein immediately | Press release | PR Newswire | — | — | |
| Shareholders who lost money in shares of Ostin Technology Group Co., Ltd. (NASDAQ: OST) should contact Wolf Haldenstein immediately | Press release | GlobeNewswire | — | — | |
| Shareholders who lost money in shares of Ostin Technology Group Co., Ltd. (NASDAQ: OST) should contact Wolf Haldenstein immediately | Press release | PR Newswire | — | — | |
| Shareholders who lost money in shares of Ostin Technology Group Co., Ltd. (NASDAQ: OST) should contact Wolf Haldenstein immediately | Press release | GlobeNewswire | — | — | |
| Form 20-F Ostin Technology Group For: Sep 30 | SEC filing · Form 20-F | SEC EDGAR | — | — | |
| Form 6-K Ostin Technology Group For: Jan 08 | SEC filing · Form 6-K | SEC EDGAR | — | — | |
| Mass Production Ignition Ceremony for Colorless Transparent Polyimide Thin Film Production Line of SAEM For Ostin Group | Press release | GlobeNewswire | — | — | |
| Form 6-K Ostin Technology Group For: Oct 21 | SEC filing · Form 6-K | SEC EDGAR | — | — | |
| Form 6-K Ostin Technology Group For: Sep 26 | SEC filing · Form 6-K | SEC EDGAR | — | — | |
| Form 6-K Ostin Technology Group For: Aug 06 | SEC filing · Form 6-K | SEC EDGAR | +2.31% | -15.61% | |
| Ostin Technology Group Co., Ltd. Announces 1-for-25 Reverse Share Split Effective August 5, 2025 | Press release | GlobeNewswire | -0.82% | -5.91% | |
| Form 6-K Ostin Technology Group For: Jul 18 | SEC filing · Form 6-K | SEC EDGAR | +0.17% | -4.25% | |
| Form 6-K/A Ostin Technology Group For: Jul 10 | SEC filing · Form 6-K | SEC EDGAR | -0.86% | +5.89% | |
| Form 6-K Ostin Technology Group For: Jul 03 | SEC filing · Form 6-K | SEC EDGAR | — | +0.00% | |
| Form 6-K Ostin Technology Group For: Jun 30 | SEC filing · Form 6-K | SEC EDGAR | +0.86% | +1.56% | |
| Univest Securities, LLC Announces Closing of $5 Million Registered Direct Offering for its Client Ostin Technology Group Co., Ltd. (Nasdaq: OST) | Press release | GlobeNewswire | +0.86% | +1.56% | |
| Form 6-K Ostin Technology Group For: Mar 31 | SEC filing · Form 6-K | SEC EDGAR | -15.96% | -36.68% | |
| Ostin Technology Group Co., Ltd. Announces $5 Million Registered Direct Offering | Press release | GlobeNewswire | -15.96% | -36.68% | |
| Ostin Technology Group Co Ltd Issues Statement Regarding Market Activity | Press release | GlobeNewswire | +16.27% | +22.62% | |
| Form 6-K Ostin Technology Group For: May 12 | SEC filing · Form 6-K | SEC EDGAR | -11.21% | -8.03% | |
| Form 6-K Ostin Technology Group For: May 02 | SEC filing · Form 6-K | SEC EDGAR | +0.31% | -0.62% | |
| Form 6-K Ostin Technology Group For: Apr 16 | SEC filing · Form 6-K | SEC EDGAR | +1.01% | -6.06% | |
| Ostin Technology Group Announces Pricing of $5.0 million Registered Direct Offering | Press release | GlobeNewswire | +1.01% | -6.06% | |
| Form 6-K Ostin Technology Group For: Apr 09 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | -7.45% | |
| Form 6-K Ostin Technology Group For: Apr 01 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | +8.45% | |
| Form 6-K Ostin Technology Group For: Mar 21 | SEC filing · Form 6-K | SEC EDGAR | — | -0.78% | |
| Form 6-K Ostin Technology Group For: Feb 14 | SEC filing · Form 6-K | SEC EDGAR | +2.28% | +0.00% | |
| Form 20-F Ostin Technology Group For: Sep 30 | SEC filing · Form 20-F | SEC EDGAR | -4.10% | +18.85% | |
| Form 6-K Ostin Technology Group For: Jan 23 | SEC filing · Form 6-K | SEC EDGAR | -4.64% | -3.57% | |
| Form 6-K Ostin Technology Group For: Jan 17 | SEC filing · Form 6-K | SEC EDGAR | +0.08% | +4.76% | |
| Ostin Technology Group Achieves Outstanding Sales Results During Singles’ Day and December 12 Shopping Festivals | Press release | GlobeNewswire | +1.64% | -0.41% | |
| Ostin Technology Group Announces Participation at CES 2025, Inspiring Greatness with Latest Pintura Products at the Premier Global Technology Trade Show | Press release | GlobeNewswire | -7.47% | -25.00% | |
| Ostin Technology Group Announces Update to Effective Date of Reverse Share Split | Press release | GlobeNewswire | -2.66% | -13.30% | |
| Form 6-K/A Ostin Technology Group For: Dec 23 | SEC filing · Form 6-K | SEC EDGAR | -2.66% | -13.30% | |
| Form 6-K Ostin Technology Group For: Dec 20 | SEC filing · Form 6-K | SEC EDGAR | +0.90% | +7.04% | |
| Ostin Technology Group Announces Effective Date of Reverse Share Split | Press release | GlobeNewswire | +0.90% | +7.04% | |
| Form 6-K Ostin Technology Group For: Nov 27 | SEC filing · Form 6-K | SEC EDGAR | +4.96% | +16.15% | |
| Ostin Technology Group Announces Results of Extraordinary General Meeting | Press release | GlobeNewswire | +4.96% | +16.15% | |
| Form 6-K Ostin Technology Group For: Nov 08 | SEC filing · Form 6-K | SEC EDGAR | -2.50% | -3.25% | |
| Form 6-K Ostin Technology Group For: Oct 04 | SEC filing · Form 6-K | SEC EDGAR | +1.62% | +6.76% | |
| Form EFFECT Ostin Technology Group | SEC filing · Form EFFECT | SEC EDGAR | — | +5.75% | |
| Form F-1/A Ostin Technology Group | SEC filing · Form F-1 | SEC EDGAR | — | -14.09% | |
| Form 6-K Ostin Technology Group For: Mar 31 | SEC filing · Form 6-K | SEC EDGAR | +0.00% | +5.39% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the OST section they belong to.
Where else OST is measured.
OST earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Ostin Technology Group Co., Ltd. - Class A Ordinary Shares's median reaction calculated?
Every labeled OST 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 330 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. 32% of OST'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 OST'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.