Littelfuse, Inc. (LFUS)
LFUS moved a median of -0.01% 30 minutes after news, and -0.11% by the close. How LFUS actually reacts to news — the realized, point-in-time move the market made, measured across 475 labeled events over the last three years with zero look-ahead.
LFUS’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 49% | 455 |
| 30-min | -0.01% | 48% | 475 |
| 60-min | -0.02% | 49% | 475 |
| to close | -0.11% | 48% | 474 |
| Middle 50% of LFUS reactions | -0.47% to +0.43% |
|---|---|
| Median reaction (30-min) | -0.01% |
| Measured reactions | 475 |
Half of all Littelfuse, Inc. news events land between -0.47% and +0.43% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How LFUS reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 31 | +0.09% | 58% | +0.86% |
| Analyst downgrades | 18 | +0.06% | 56% | -0.32% |
| Rating reiterations | 36 | -0.28% | 36% | -0.87% |
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. 3 further classes were observed with fewer than 10 measured events and are not published. See how LFUS ranks against every other measured name →
That’s how LFUS usually reacts — get an email when it moves on news →Email me when LFUS moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to LFUS's baseline. Nothing else.
Recent LFUS events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Littelfuse to Release Third Quarter Financial Results Before Market Open on October 28 | Press release | Business Wire | -2.32% | +0.47% | |
| Form 8-K LITTELFUSE INC /DE For: Sep 15 | SEC filing · Form 8-K | SEC EDGAR | +0.39% | -1.13% | |
| Form 8-K LITTELFUSE INC /DE For: Sep 10 | SEC filing · Form 8-K | SEC EDGAR | -0.06% | -1.44% | |
| Littelfuse Announces Senior Leadership Transition | Press release | Business Wire | -0.06% | -1.44% | |
| Flip Electronics Announces Authorized Distribution Partnership with Littelfuse | Press release | PR Newswire | -0.05% | -0.49% | |
| Form 8-K LITTELFUSE INC /DE For: Aug 06 | SEC filing · Form 8-K | SEC EDGAR | +0.41% | -0.51% | |
| Littelfuse Appoints Todd Kelsey to Board of Directors | Press release | Business Wire | +0.41% | -0.51% | |
| Form 10-Q LITTELFUSE INC /DE For: Jun 27 | SEC filing · Form 10-Q | SEC EDGAR | +0.64% | -0.12% | |
| Form 8-K LITTELFUSE INC /DE For: Jul 29 | SEC filing · Form 8-K | SEC EDGAR | +3.57% | -2.05% | |
| Littelfuse Reports Second Quarter Results for 2026 | Press release | Business Wire | +3.57% | -2.05% | |
| Littelfuse to Release Second Quarter Financial Results Before Market Open on July 29 | Press release | Business Wire | -0.25% | -0.82% | |
| Form SD LITTELFUSE INC /DE | SEC filing · Form SD | SEC EDGAR | -1.09% | -0.78% | |
| Form 8-K LITTELFUSE INC /DE For: May 14 | SEC filing · Form 8-K | SEC EDGAR | -4.24% | -4.72% | |
| Littelfuse to Host 2026 Investor Day Today | Press release | Business Wire | -4.24% | -4.72% | |
| Form 10-Q LITTELFUSE INC /DE For: Mar 28 | SEC filing · Form 10-Q | SEC EDGAR | +0.22% | -2.59% | |
| Form 8-K LITTELFUSE INC /DE For: May 06 | SEC filing · Form 8-K | SEC EDGAR | +2.96% | +0.38% | |
| Littelfuse Reports First Quarter Results for 2026 | Press release | Business Wire | +2.96% | +0.38% | |
| Form 8-K LITTELFUSE INC /DE For: Apr 22 | SEC filing · Form 8-K | SEC EDGAR | +0.53% | -0.80% | |
| Littelfuse Appoints Anne-Marie D’Angelo as Chief Legal Officer and Corporate Secretary | Press release | Business Wire | +0.93% | +0.22% | |
| Littelfuse to Release First Quarter Financial Results Before Market Open on May 6 | Press release | Business Wire | -0.35% | -0.44% | |
| Littelfuse to Host 2026 Investor Day | Press release | Business Wire | +1.54% | +6.76% | |
| Form 8-K LITTELFUSE INC /DE For: Mar 12 | SEC filing · Form 8-K | SEC EDGAR | -0.35% | -0.31% | |
| Form ARS LITTELFUSE INC /DE For: Dec 27 | SEC filing · Form ARS | SEC EDGAR | +0.28% | -0.96% | |
| Form DEF 14A LITTELFUSE INC /DE For: Apr 22 | SEC filing · Form DEF | SEC EDGAR | +0.28% | -0.96% | |
| Form DEFA14A LITTELFUSE INC /DE | SEC filing · Form DEFA14A | SEC EDGAR | +0.28% | -0.96% | |
| Form 8-K LITTELFUSE INC /DE For: Mar 04 | SEC filing · Form 8-K | SEC EDGAR | -0.99% | -3.45% | |
| Littelfuse Appoints Holly B. Paeper to Board of Directors | Press release | Business Wire | -0.99% | -3.45% | |
| Form 10-K LITTELFUSE INC /DE For: Dec 27 | SEC filing · Form 10-K | SEC EDGAR | -0.32% | +0.67% | |
| Form 8-K LITTELFUSE INC /DE For: Jan 28 | SEC filing · Form 8-K | SEC EDGAR | +5.41% | +1.51% | |
| Littelfuse Reports Fourth Quarter and Full Year 2025 Results | Press release | Business Wire | +5.41% | +1.51% | |
| GulfStar Group Announces the Acquisition of Basler Electric by Littelfuse | Press release | GlobeNewswire | +0.07% | +1.66% | |
| Littelfuse to Release Fourth Quarter Financial Results Before Market Open on January 28 | Press release | Business Wire | +0.00% | +0.87% | |
| Form 8-K LITTELFUSE INC /DE For: Jan 07 | SEC filing · Form 8-K | SEC EDGAR | -0.33% | +1.39% | |
| Littelfuse Completes Acquisition of Basler Electric | Press release | Business Wire | +0.15% | -3.44% | |
| Form 10-Q LITTELFUSE INC /DE For: Sep 27 | SEC filing · Form 10-Q | SEC EDGAR | +0.28% | -0.84% | |
| Form 8-K LITTELFUSE INC /DE For: Oct 29 | SEC filing · Form 8-K | SEC EDGAR | -2.97% | -2.90% | |
| Littelfuse Reports Third Quarter Results for 2025 | Press release | Business Wire | -2.97% | -2.90% | |
| Form 8-K LITTELFUSE INC /DE For: Oct 24 | SEC filing · Form 8-K | SEC EDGAR | -2.97% | -2.90% | |
| Littelfuse to Acquire Basler Electric, Enhancing High-Growth Industrial Market Positioning | Press release | Business Wire | -2.97% | -2.90% | |
| Littelfuse to Release Third Quarter Financial Results Before Market Open on Oct 29 | Press release | Business Wire | +0.43% | +0.62% | |
| Littelfuse to Present at Upcoming Investor Conference | Press release | Business Wire | +0.00% | +0.61% | |
| Midtronics Welcomes Former Littelfuse CEO Dave Heinzmann to Board of Advisors | Press release | PR Web | — | +1.03% | |
| Form 8-K LITTELFUSE INC /DE For: Aug 07 | SEC filing · Form 8-K | SEC EDGAR | -0.26% | -2.39% | |
| Littelfuse names Dr. Karim Hamed Senior Vice President and General Manager, Semiconductor Business | Press release | Business Wire | -0.26% | -2.39% | |
| Form 10-Q LITTELFUSE INC /DE For: Jun 28 | SEC filing · Form 10-Q | SEC EDGAR | -0.07% | -1.19% | |
| Form 8-K LITTELFUSE INC /DE For: Jul 30 | SEC filing · Form 8-K | SEC EDGAR | +0.39% | -3.14% | |
| Littelfuse Reports Second Quarter Results for 2025 | Press release | Business Wire | +0.68% | -2.85% | |
| Littelfuse to Release Second Quarter Financial Results Before Market Open on July 30 | Press release | Business Wire | +0.21% | +0.77% | |
| Form SD LITTELFUSE INC /DE | SEC filing · Form SD | SEC EDGAR | +0.01% | -2.17% | |
| Form 8-K LITTELFUSE INC /DE For: May 27 | SEC filing · Form 8-K | SEC EDGAR | +0.28% | +1.26% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the LFUS section they belong to.
Where else LFUS is measured.
LFUS earnings → · Analyst actions → · SEC filings →
Other Technology names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Tenable Holdings, Inc. (TENB) | 478 | 0.00% | 49% |
| SVMK INC COMMON (SVMK) | 477 | +0.08% | 53% |
| Plexus Corp. (PLXS) | 475 | +0.00% | 50% |
| ATTUNITY (ATTU) | 474 | 0.00% | 47% |
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 →
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 Littelfuse, Inc.'s median reaction calculated?
Every labeled LFUS 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 475 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. 48% of LFUS'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 LFUS'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.