Proto Labs, Inc. Common stock (PRLB)
PRLB moved a median of -0.18% 30 minutes after news, and +0.03% by the close. How PRLB actually reacts to news — the realized, point-in-time move the market made, measured across 287 labeled events over the last three years with zero look-ahead.
PRLB’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 37% | 276 |
| 30-min | -0.18% | 41% | 286 |
| 60-min | -0.12% | 45% | 286 |
| to close | +0.03% | 53% | 286 |
| Middle 50% of PRLB reactions | -0.66% to +0.26% |
|---|---|
| Median reaction (30-min) | -0.18% |
| Measured reactions | 287 |
Half of all Proto Labs, Inc. Common stock news events land between -0.66% and +0.26% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How PRLB reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 22 | +0.14% | 59% | +1.03% |
| Analyst downgrades | 12 | -0.29% | 33% | +0.42% |
| Rating reiterations | 22 | -0.31% | 32% | 0.00% |
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 PRLB ranks against every other measured name →
That’s how PRLB usually reacts — get an email when it moves on news →Email me when PRLB moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to PRLB's baseline. Nothing else.
Recent PRLB events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Protolabs Sets Conference Call to Discuss Third Quarter 2026 Financial Results | Press release | Business Wire | -0.93% | +1.05% | |
| Protolabs Accelerates the Future of Robotics with Rapid Manufacturing | Press release | Business Wire | +0.01% | -0.29% | |
| Protolabs Named to Business Insider’s America’s Most Innovative Businesses 2027 List | Press release | Business Wire | -0.40% | +0.93% | |
| Form 8-K Proto Labs Inc For: Aug 24 | SEC filing · Form 8-K | SEC EDGAR | — | -1.93% | |
| Protolabs Appoints Sam Ramahi as Chief Operations Officer | Press release | Business Wire | +0.05% | -1.88% | |
| Protolabs Supports MIT Industrial Performance Center Research Fellows to Accelerate U.S. Medical and Aerospace Manufacturing Innovation | Press release | Business Wire | -0.54% | +1.20% | |
| Form 10-Q Proto Labs Inc For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.59% | +0.45% | |
| Form 8-K Proto Labs Inc For: Jul 31 | SEC filing · Form 8-K | SEC EDGAR | +3.74% | -6.19% | |
| Form S-8 Proto Labs Inc | SEC filing · Form S-8 | SEC EDGAR | +0.27% | +3.82% | |
| Protolabs Reports Financial Results for the Second Quarter of 2026 | Press release | Business Wire | +3.74% | -6.19% | |
| Protolabs Named to TIME’s 2026 List of America’s Best Companies | Press release | Business Wire | +0.19% | -0.84% | |
| Protolabs Sets Conference Call to Discuss Second Quarter 2026 Financial Results | Press release | Business Wire | -0.41% | -0.96% | |
| Protolabs Accelerates Growth and Drone Innovation with On-Demand Manufacturing Capabilities | Press release | Business Wire | -1.95% | -3.48% | |
| Form SD Proto Labs Inc | SEC filing · Form SD | SEC EDGAR | -0.24% | +1.03% | |
| Form 8-K Proto Labs Inc For: May 19 | SEC filing · Form 8-K | SEC EDGAR | -0.14% | +0.05% | |
| Form 8-K Proto Labs Inc For: May 06 | SEC filing · Form 8-K | SEC EDGAR | -2.34% | -2.25% | |
| Protolabs Strengthens Executive Leadership Team with Appointment of Bernardo Parlange as Chief Commercial Officer | Press release | Business Wire | -2.34% | -2.25% | |
| Form 10-Q Proto Labs Inc For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.18% | +5.32% | |
| Form 8-K Proto Labs Inc For: May 01 | SEC filing · Form 8-K | SEC EDGAR | -2.02% | -2.13% | |
| Protolabs Reports Financial Results for the First Quarter of 2026 | Press release | Business Wire | +0.37% | +0.26% | |
| Protolabs Sets Conference Call to Discuss First Quarter 2026 Financial Results | Press release | Business Wire | +0.00% | -0.81% | |
| Protolabs Joins Space Foundation to Help Propel Aerospace Innovation into a New Space Age | Press release | Business Wire | +0.04% | +1.50% | |
| Form ARS Proto Labs Inc For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | — | -0.61% | |
| Form DEF 14A Proto Labs Inc For: May 19 | SEC filing · Form DEF | SEC EDGAR | -0.46% | -1.06% | |
| Form DEFA14A Proto Labs Inc | SEC filing · Form DEFA14A | SEC EDGAR | -0.26% | -0.87% | |
| Protolabs’ Innovation in Manufacturing Report Details Industry’s Rapid Digital Adoption | Press release | Business Wire | -0.24% | +4.09% | |
| Protolabs to Attend 2026 Cantor Global Technology & Industrial Growth Conference on March 10, 2026 | Press release | Business Wire | +1.01% | +1.25% | |
| Form 10-K Proto Labs Inc For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.08% | -0.43% | |
| Protolabs Introduces ProDesk, an AI-Enabled Manufacturing Platform to Accelerate Projects from Prototyping to Production | Press release | Business Wire | -0.64% | -0.56% | |
| Form 8-K Proto Labs Inc For: Feb 06 | SEC filing · Form 8-K | SEC EDGAR | +1.03% | +16.61% | |
| Form 8-K/A Proto Labs Inc For: Feb 06 | SEC filing · Form 8-K | SEC EDGAR | -0.16% | +0.53% | |
| Protolabs Reports Financial Results for the Fourth Quarter and Full Year 2025 | Press release | Business Wire | +1.03% | +16.61% | |
| Protolabs Sets Conference Call to Discuss Fourth Quarter and Full Year 2025 Financial Results | Press release | Business Wire | -0.54% | -1.16% | |
| Protolabs Significantly Expands U.S. Metal 3D Printing Capacity | Press release | Business Wire | +0.00% | -0.22% | |
| Form 10-Q Proto Labs Inc For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.34% | +5.76% | |
| Form 8-K Proto Labs Inc For: Oct 31 | SEC filing · Form 8-K | SEC EDGAR | -3.71% | -7.16% | |
| Protolabs Reports Financial Results for the Third Quarter of 2025 | Press release | Business Wire | -3.71% | -7.16% | |
| Protolabs Introduces Advanced CNC Machining Capabilities to Accelerate Rapid Prototyping and Product Development | Press release | Business Wire | -0.17% | -1.59% | |
| Protolabs Sets Conference Call to Discuss Third Quarter 2025 Financial Results | Press release | Business Wire | +0.46% | -1.43% | |
| Form 8-K Proto Labs Inc For: Oct 03 | SEC filing · Form 8-K | SEC EDGAR | -0.12% | -2.03% | |
| Protolabs Appoints Marc Kermisch as New Chief Technology and AI Officer | Press release | Business Wire | +0.40% | -1.37% | |
| Form 10-Q Proto Labs Inc For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.49% | -2.94% | |
| Form 8-K Proto Labs Inc For: Jul 31 | SEC filing · Form 8-K | SEC EDGAR | -1.22% | -0.48% | |
| Protolabs Reports Financial Results for the Second Quarter of 2025 | Press release | Business Wire | -1.22% | -0.48% | |
| Protolabs Sets Conference Call to Discuss Second Quarter 2025 Financial Results | Press release | Business Wire | +0.00% | +0.54% | |
| Form 8-K Proto Labs Inc For: May 24 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.98% | |
| Form SD Proto Labs Inc | SEC filing · Form SD | SEC EDGAR | -0.05% | +0.16% | |
| Form S-8 Proto Labs Inc | SEC filing · Form S-8 | SEC EDGAR | -0.29% | -1.62% | |
| Protolabs Announces Inducement Awards Under NYSE Rule 303A.08 | Press release | Business Wire | +0.00% | +2.22% | |
| Form 8-K Proto Labs Inc For: May 20 | SEC filing · Form 8-K | SEC EDGAR | -0.41% | -4.61% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the PRLB section they belong to.
Where else PRLB is measured.
PRLB earnings → · Analyst actions → · SEC filings →
Other Industrials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| VerifyMe, Inc. (VRME) | 288 | 0.00% | 39% |
| IES Holdings, Inc. (IESC) | 287 | +0.05% | 51% |
| Sturm, Ruger & Company, Inc. (RGR) | 287 | +0.03% | 52% |
| ITT Inc. (ITT) | 286 | +0.07% | 55% |
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 Industrials names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Proto Labs, Inc. Common stock's median reaction calculated?
Every labeled PRLB 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 287 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 PRLB'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 PRLB'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.