Charles River Laboratories International, Inc. (CRL)
CRL moved a median of -0.10% 30 minutes after news, and -0.07% by the close. How CRL actually reacts to news — the realized, point-in-time move the market made, measured across 434 labeled events over the last three years with zero look-ahead.
CRL’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.02% | 46% | 434 |
| 30-min | -0.10% | 45% | 434 |
| 60-min | 0.00% | 50% | 434 |
| to close | -0.07% | 47% | 433 |
| Middle 50% of CRL reactions | -0.75% to +0.56% |
|---|---|
| Median reaction (30-min) | -0.10% |
| Measured reactions | 434 |
Half of all Charles River Laboratories International, Inc. news events land between -0.75% and +0.56% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How CRL reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 55 | -0.56% | 29% | -0.53% |
| Analyst downgrades | 41 | +0.38% | 63% | +0.32% |
| Coverage initiations | 17 | -0.13% | 29% | +0.34% |
| Rating reiterations | 94 | +0.02% | 51% | +0.10% |
| Price-target raises | 24 | -0.10% | 46% | -0.26% |
| Price-target cuts | 28 | +0.12% | 64% | +0.66% |
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. See how CRL ranks against every other measured name →
That’s how CRL usually reacts — get an email when it moves on news →Email me when CRL moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to CRL's baseline. Nothing else.
Recent CRL events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Charles River Collaborates with Magellan Stem Cells to Advance Stem Cell and Regenerative Medicine Development | Press release | Business Wire | -0.72% | -0.66% | |
| Charles River Laboratories Schedules Third-Quarter 2026 Earnings Release and Conference Call | Press release | Business Wire | +0.27% | +0.79% | |
| Charles River and Autolomous Partner to Transform Laboratory Execution Systems | Press release | Business Wire | +2.17% | -4.72% | |
| Charles River Highlights Refreshed Strategic Vision to Drive Profitable Growth and Long-Term Value Creation at 2026 Investor Day | Press release | Business Wire | +3.24% | +6.30% | |
| Form 8-K CHARLES RIVER LABORATORI For: Sep 24 | SEC filing · Form 8-K | SEC EDGAR | +3.24% | +6.30% | |
| Charles River Leverages Expertise in Rapid and In Vitro Methods to Reduce Cell Banking Timelines | Press release | Business Wire | -0.67% | +1.36% | |
| Charles River Laboratories to Present at Morgan Stanley and Baird Conferences | Press release | Business Wire | +0.70% | +0.81% | |
| Charles River Modernizes Endosafe® Endotoxin Testing Cartridge Manufacturing with Fully Automated Production Suite | Press release | Business Wire | +0.02% | -1.20% | |
| Charles River Laboratories and Medigen Vaccine Biologics Corp Collaborate to Advance New Vaccine Development Programs Through Next Generation Sequencing | Press release | Business Wire | +1.88% | +2.00% | |
| Charles River Laboratories Announces Second-Quarter 2026 Results | Press release | Business Wire | -1.31% | -0.87% | |
| Form 10-Q CHARLES RIVER LABORATORI For: Jun 27 | SEC filing · Form 10-Q | SEC EDGAR | -1.31% | -0.87% | |
| Form 8-K CHARLES RIVER LABORATORI For: Aug 05 | SEC filing · Form 8-K | SEC EDGAR | -1.31% | -0.87% | |
| Charles River Laboratories Schedules Second-Quarter 2026 Earnings Release and Conference Call | Press release | Business Wire | +0.00% | -1.76% | |
| Charles River Provides NGS Services to Arovella Therapeutics, Accelerating Progress Toward Alternative Cancer Treatment Approaches | Press release | Business Wire | -0.72% | -1.56% | |
| Did Charles River Laboratories International, Inc. Insiders Breach their Fiduciary Duties to Shareholders? | Press release | PR Newswire | +0.26% | +1.58% | |
| Charles River Joins Lilly TuneLab to Optimize AI/ML Platform through Nonclinical Testing Expertise | Press release | Business Wire | +0.80% | +0.71% | |
| Charles River Laboratories to Present at William Blair and Jefferies Conferences | Press release | Business Wire | -0.51% | +0.99% | |
| Charles River Laboratories and MEDIPOST Sign Non-Exclusive MOU to Advance GMP Testing Solutions | Press release | Business Wire | -0.29% | -2.51% | |
| Charles River Accelerates Digital Pathology with AI-Powered End-to-End Workflow | Press release | Business Wire | -1.03% | -4.81% | |
| Form 8-K CHARLES RIVER LABORATORI For: May 05 | SEC filing · Form 8-K | SEC EDGAR | -0.28% | -0.32% | |
| Form SD CHARLES RIVER LABORATORI | SEC filing · Form SD | SEC EDGAR | -1.03% | -4.81% | |
| Charles River Laboratories Announces First-Quarter 2026 Results | Press release | Business Wire | +1.21% | -3.41% | |
| Form 10-Q CHARLES RIVER LABORATORI For: Mar 28 | SEC filing · Form 10-Q | SEC EDGAR | -0.68% | -2.71% | |
| Form 8-K CHARLES RIVER LABORATORI For: May 07 | SEC filing · Form 8-K | SEC EDGAR | +1.21% | -3.41% | |
| Form S-8 CHARLES RIVER LABORATORI | SEC filing · Form S-8 | SEC EDGAR | -0.68% | -2.71% | |
| Charles River Launches Rat In Vitro Fertility Services Demonstrating Embryology Capabilities | Press release | Business Wire | +0.09% | +2.34% | |
| Charles River Highlights Effectiveness of VCGs in Toxicology | Press release | Business Wire | -0.35% | -1.65% | |
| Charles River Laboratories Schedules First-Quarter 2026 Earnings Release and Conference Call | Press release | Business Wire | +1.64% | -1.40% | |
| Charles River Advances Cardiovascular Health Awareness Through Support of the American Heart Association | Press release | Business Wire | -1.06% | -0.26% | |
| Form ARS CHARLES RIVER LABORATORI For: Dec 27 | SEC filing · Form ARS | SEC EDGAR | -0.30% | +6.12% | |
| Form DEF 14A CHARLES RIVER LABORATORI For: May 05 | SEC filing · Form DEF | SEC EDGAR | -0.30% | +6.12% | |
| Charles River Laboratories to Present at TD Cowen and Barclays Conferences | Press release | Business Wire | +2.23% | +1.89% | |
| Charles River Laboratories Provides Update on Planned Divestitures | Press release | Business Wire | -0.59% | -1.38% | |
| Form 8-K CHARLES RIVER LABORATORI For: Feb 25 | SEC filing · Form 8-K | SEC EDGAR | -0.59% | -1.38% | |
| Charles River Laboratories Announces Executive Appointments | Press release | Business Wire | +5.07% | +7.62% | |
| Charles River Laboratories Announces Fourth-Quarter and Full-Year 2025 Results and Provides 2026 Guidance | Press release | Business Wire | +5.07% | +7.62% | |
| Form 10-K CHARLES RIVER LABORATORI For: Dec 27 | SEC filing · Form 10-K | SEC EDGAR | +5.07% | +7.62% | |
| Form 8-K CHARLES RIVER LABORATORI For: Feb 18 | SEC filing · Form 8-K | SEC EDGAR | +5.07% | +7.62% | |
| Halper Sadeh LLC Encourages Charles River Laboratories International, Inc. Shareholders to Contact the Firm to Discuss Their Rights | Press release | GlobeNewswire | +0.30% | +4.53% | |
| Charles River Enters Manufacturing Collaboration with Gazi University | Press release | Business Wire | +0.45% | +3.30% | |
| Charles River Laboratories Schedules Fourth-Quarter 2025 Earnings and 2026 Guidance Release and Conference Call | Press release | Business Wire | -0.63% | -1.91% | |
| Form 8-K CHARLES RIVER LABORATORI For: Jan 13 | SEC filing · Form 8-K | SEC EDGAR | +1.84% | -1.21% | |
| Charles River Laboratories Provides Business Updates | Press release | Business Wire | +1.84% | -1.21% | |
| Form 8-K CHARLES RIVER LABORATORI For: Jan 08 | SEC filing · Form 8-K | SEC EDGAR | -0.58% | -1.08% | |
| Charles River Laboratories Announces Planned Retirement of James C. Foster and CEO Succession Plan | Press release | Business Wire | -0.47% | +0.75% | |
| Charles River Extends Commitment to Advanced Therapy Developers with Second Incubator Program Cohort | Press release | Business Wire | +0.24% | -0.26% | |
| Form 8-K CHARLES RIVER LABORATORI For: Dec 03 | SEC filing · Form 8-K | SEC EDGAR | +0.56% | +2.08% | |
| Charles River Laboratories to Present at Evercore Healthcare Conference | Press release | Business Wire | -0.04% | -0.69% | |
| HALPER SADEH LLC ENCOURAGES CHARLES RIVER LABORATORIES INTERNATIONAL, INC. SHAREHOLDERS TO CONTACT THE FIRM TO DISCUSS THEIR RIGHTS | Press release | PR Newswire | -0.01% | -0.78% | |
| Charles River Laboratories to Present at Jefferies Global Healthcare Conference | Press release | Business Wire | -0.60% | -3.44% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the CRL section they belong to.
Where else CRL is measured.
CRL earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| CATASYS (CATS) | 434 | 0.00% | 41% |
| Cytocom Inc. (CBLI) | 434 | 0.00% | 40% |
| Nymox Pharmaceutical Corporation (NYMX) | 433 | 0.00% | 48% |
| IMMUNE DESIGN CORP COMMON STOCK (IMDZ) | 432 | -0.12% | 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 Healthcare names, measured the same way →
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How the numbers are made.
How is Charles River Laboratories International, Inc.'s median reaction calculated?
Every labeled CRL 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 434 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. 45% of CRL'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 CRL'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.