Silicon Motion Technology Corporation - American Depositary Shares, each representing four ordinary shares (SIMO)
SIMO moved a median of +0.08% 30 minutes after news, and +0.17% by the close. How SIMO actually reacts to news — the realized, point-in-time move the market made, measured across 302 labeled events over the last three years with zero look-ahead.
SIMO’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.02% | 52% | 295 |
| 30-min | +0.08% | 53% | 298 |
| 60-min | +0.02% | 51% | 298 |
| to close | +0.17% | 52% | 295 |
| Middle 50% of SIMO reactions | -0.55% to +0.85% |
|---|---|
| Median reaction (30-min) | +0.08% |
| Measured reactions | 302 |
Half of all Silicon Motion Technology Corporation - American Depositary Shares, each representing four ordinary shares news events land between -0.55% and +0.85% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How SIMO reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 27 | +0.07% | 56% | -0.24% |
| Analyst downgrades | 10 | +0.22% | 50% | +0.89% |
| Rating reiterations | 75 | -0.06% | 49% | -0.54% |
| Price-target raises | 21 | +0.15% | 57% | -0.18% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. 2 further classes were observed with fewer than 10 measured events and are not published. See how SIMO ranks against every other measured name →
That’s how SIMO usually reacts — get an email when it moves on news →Email me when SIMO moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to SIMO's baseline. Nothing else.
Recent SIMO events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| GMIF2026: AI Inference Powers the "Token Factory" and Drives System-Level Rethinking of Memory & Storage | Press release | PR Newswire | — | — | |
| Form 6-K Silicon Motion Technolog For: Oct 16 | SEC filing · Form 6-K | SEC EDGAR | — | — | |
| Silicon Motion Announces Annual Dividend Increase | Press release | GlobeNewswire | -2.45% | -3.48% | |
| GMIF2026 Annual Awards Unveiled: Samsung, Sandisk, Lenovo, Silicon Motion, BIWIN, and More Recognized | Press release | PR Newswire | -3.44% | -4.65% | |
| Form 6-K Silicon Motion Technolog For: Oct 08 | SEC filing · Form 6-K | SEC EDGAR | -0.44% | -1.53% | |
| Silicon Motion Announces Third Quarter 2026 Earnings Conference Call | Press release | GlobeNewswire | +0.54% | -6.17% | |
| AI Memory & Storage: The 5th GMIF2026 Innovation Summit Successfully Concludes in Shenzhen | Press release | PR Newswire | +0.03% | +1.52% | |
| Form 6-K Silicon Motion Technolog For: Sep 22 | SEC filing · Form 6-K | SEC EDGAR | -0.11% | -0.64% | |
| GMIF 2026 Speakers Unveiled: Samsung, Sandisk, Solidigm and More on the Lineup | Press release | PR Newswire | -4.21% | -3.13% | |
| Silicon Motion Earns ISO/SAE 21434 Automotive Cybersecurity Process Certification | Press release | PR Newswire | +0.86% | +1.54% | |
| Silicon Motion to Attend Upcoming Investor Conferences | Press release | GlobeNewswire | -1.48% | +4.01% | |
| Silicon Motion Reaches Initial Milestone in EU Cyber Resilience Act Compliance Program | Press release | Business Wire | -1.04% | -0.33% | |
| Form 6-K Silicon Motion Technolog For: Aug 13 | SEC filing · Form 6-K | SEC EDGAR | +0.41% | +5.99% | |
| Silicon Motion Technology Corporation Announces Closing of Upsized Offering of $1,150,000,000 of 0.00% Convertible Senior Notes due 2031 | Press release | GlobeNewswire | +0.41% | +5.99% | |
| Form 6-K Silicon Motion Technolog For: Aug 10 | SEC filing · Form 6-K | SEC EDGAR | -0.58% | -2.18% | |
| Form 6-K Silicon Motion Technolog For: Aug 10 | SEC filing · Form 6-K | SEC EDGAR | — | — | |
| Silicon Motion Technology Corporation Announces Proposed Offering of 0.00% Convertible Senior Notes due 2031 | Press release | GlobeNewswire | — | — | |
| Silicon Motion Technology Corporation Prices Upsized Offering of $1.0 Billion Convertible Senior Notes due 2031 | Press release | GlobeNewswire | -0.58% | -2.18% | |
| Silicon Motion Unveils MonTitan™ SSD Reference Design Kit for AI Infrastructure | Press release | Business Wire | -0.00% | — | |
| Silicon Motion Showcases Next-Generation Storage Solutions for Agentic AI Applications at FMS 2026 | Press release | Business Wire | +1.09% | -5.28% | |
| Silicon Motion Unveils MonTitan™ SSD Reference Design Kit for AI Infrastructure at FMS 2026 | Press release | Business Wire | -0.91% | +9.32% | |
| AIC to Showcase Context Memory and AI Inference Storage Platforms at FMS 2026 | Press release | PR Newswire | +2.66% | +2.48% | |
| Silicon Motion Showcases Next-Generation Storage Solutions for Agentic AI Applications at FMS 2026 | Press release | Business Wire | -2.34% | +3.55% | |
| Form 6-K Silicon Motion Technolog For: Jul 30 | SEC filing · Form 6-K | SEC EDGAR | +6.20% | -0.31% | |
| Silicon Motion and MediaTek to Showcase Advanced Storage Solutions for Next-Generation AI-Ready Automotive Platforms at FMS 2026 Keynote | Press release | Business Wire | +6.20% | -0.31% | |
| Silicon Motion Announces Results for the Quarterly Period Ended June 30, 2026 | Press release | GlobeNewswire | +6.20% | -0.31% | |
| Form 6-K Silicon Motion Technolog For: Jul 24 | SEC filing · Form 6-K | SEC EDGAR | -1.68% | -8.81% | |
| Silicon Motion Confirms Quarterly Dividend | Press release | GlobeNewswire | +2.28% | -2.32% | |
| Form 6-K Silicon Motion Technolog For: Jul 08 | SEC filing · Form 6-K | SEC EDGAR | +2.62% | +0.01% | |
| Silicon Motion Announces Second Quarter 2026 Earnings Conference Call | Press release | GlobeNewswire | +2.56% | +6.58% | |
| Corgi Launches 31 Single-Stock 2x Daily ETFs Across Two Waves on Cboe BZX, Including the First and Lowest-Cost 2x ETFs on Dozens of Stocks | Press release | PR Newswire | +2.62% | +9.19% | |
| Form SD Silicon Motion Technolog | SEC filing · Form SD | SEC EDGAR | -1.14% | -3.13% | |
| Silicon Motion Introduces Advanced AI-Optimized SM2524XT PCIe Gen5 DRAMless SSD Controller for AI PCs | Press release | Business Wire | -1.14% | -3.13% | |
| Silicon Motion Introduces Advanced AI-Optimized SM2524XT PCIe Gen5 DRAMless SSD Controller for AI PCs | Press release | Business Wire | -0.86% | -2.47% | |
| Silicon Motion Showcases Next-Generation Storage Architectures for AI Platforms and Infrastructure at COMPUTEX 2026 | Press release | Business Wire | -2.97% | -1.03% | |
| Silicon Motion Achieves ISO 26262 Certification for Automotive Applications | Press release | Business Wire | +1.09% | +1.80% | |
| Silicon Motion Achieves ISO 26262 Certification for Automotive Applications | Press release | Business Wire | -2.39% | +1.04% | |
| Silicon Motion to Attend Upcoming Investor Conferences | Press release | GlobeNewswire | -0.14% | -9.24% | |
| Form 20-F Silicon Motion Technolog For: Dec 31 | SEC filing · Form 20-F | SEC EDGAR | +4.90% | +10.62% | |
| Form 6-K Silicon Motion Technolog For: Apr 29 | SEC filing · Form 6-K | SEC EDGAR | +3.09% | +11.54% | |
| Silicon Motion Announces Results for the Quarterly Period Ended March 31, 2026 | Press release | GlobeNewswire | +3.09% | +11.54% | |
| Form 6-K Silicon Motion Technolog For: Apr 24 | SEC filing · Form 6-K | SEC EDGAR | -0.23% | -4.62% | |
| Silicon Motion Confirms Quarterly Dividend | Press release | GlobeNewswire | -1.15% | +4.44% | |
| Form 6-K Silicon Motion Technolog For: Apr 10 | SEC filing · Form 6-K | SEC EDGAR | -0.61% | +0.00% | |
| Silicon Motion Announces First Quarter 2026 Earnings Conference Call | Press release | GlobeNewswire | +1.96% | +0.21% | |
| Silicon Motion Showcases Differentiated Enterprise SSD Controllers and PCIe NVMe Boot Drive Solutions Aligned with NVIDIA AI Ecosystem at GTC | Press release | Business Wire | -0.75% | -0.02% | |
| Silicon Motion Showcases Differentiated Enterprise SSD Controllers and PCIe NVMe Boot Drive Solutions Aligned with NVIDIA AI Ecosystem at GTC | Press release | Business Wire | -0.75% | -0.02% | |
| Silicon Motion Launches SM8008, the Industry's First Purpose-Built PCIe Gen5 Controller for Enterprise Boot Drive and Ultra-Low-Power Storage | Press release | PR Newswire | +0.57% | -0.25% | |
| Silicon Motion to Showcase AI-Optimized Boot Storage and Enterprise Solutions at Embedded World 2026 | Press release | PR Newswire | +0.57% | -0.25% | |
| Silicon Motion to Showcase AI-Optimized Boot Storage and Enterprise Solutions at Embedded World 2026 | Press release | PR Newswire | +0.47% | +2.40% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the SIMO section they belong to.
Where else SIMO is measured.
SIMO earnings → · Analyst actions → · SEC filings →
Other Technology names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Knowles Corporation (KN) | 302 | -0.08% | 46% |
| Mechanical Technology Incorporated (MKTY) | 302 | 0.00% | 44% |
| Cango Inc. Class A Ordinary Shares (CANG) | 301 | -0.29% | 45% |
| HUAMI CORP ADS (HMI) | 301 | -0.19% | 43% |
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 Technology names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Silicon Motion Technology Corporation - American Depositary Shares, each representing four ordinary shares's median reaction calculated?
Every labeled SIMO 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 302 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 SIMO'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 SIMO'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.