Labcorp Holdings Inc. (LH)
LH moved a median of -0.06% 30 minutes after news, and -0.07% by the close. How LH actually reacts to news — the realized, point-in-time move the market made, measured across 577 labeled events over the last three years with zero look-ahead.
LH’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.01% | 46% | 577 |
| 30-min | -0.06% | 44% | 577 |
| 60-min | -0.03% | 47% | 577 |
| to close | -0.07% | 46% | 574 |
| Middle 50% of LH reactions | -0.37% to +0.30% |
|---|---|
| Median reaction (30-min) | -0.06% |
| Measured reactions | 577 |
Half of all Labcorp Holdings Inc. news events land between -0.37% and +0.30% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How LH reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 21 | -0.10% | 38% | -0.07% |
| Analyst downgrades | 10 | -0.05% | 50% | -0.54% |
| Coverage initiations | 16 | +0.11% | 56% | -1.11% |
| Rating reiterations | 74 | -0.10% | 43% | -0.15% |
| Price-target raises | 40 | -0.09% | 43% | -0.17% |
| Price-target cuts | 12 | -0.23% | 17% | -0.24% |
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 LH ranks against every other measured name →
That’s how LH usually reacts — get an email when it moves on news →Email me when LH moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to LH's baseline. Nothing else.
Recent LH events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Labcorp and Arianna Huffington's Thrive Global Collaborate to Launch Thrive 5 Health Test | Press release | PR Newswire | -0.25% | -0.97% | |
| Form 8-K LABCORP HOLDINGS INC. For: Sep 30 | SEC filing · Form 8-K | SEC EDGAR | -1.29% | -0.93% | |
| Labcorp to Announce Third Quarter 2026 Financial Results on October 28, 2026 | Press release | PR Newswire | -1.29% | -0.93% | |
| Form 8-K LABCORP HOLDINGS INC. For: Sep 22 | SEC filing · Form 8-K | SEC EDGAR | -0.23% | -2.54% | |
| Form 8-K LABCORP HOLDINGS INC. For: Sep 10 | SEC filing · Form 8-K | SEC EDGAR | -0.26% | +0.32% | |
| Labcorp Highlights Strategic Priorities Driving Durable Growth and Shareholder Value at 2026 Investor Day | Press release | PR Newswire | -0.11% | -4.25% | |
| Labcorp Acquires MLM Medical Labs, Expanding Global Central Laboratory and Biomarker Capabilities for Clinical Trials | Press release | PR Newswire | +0.21% | +1.15% | |
| Labcorp Launches Next Generation of Labcorp Global Trial Connect™ to Help Sponsors and Investigator Sites Navigate Clinical Trial Complexity | Press release | PR Newswire | -0.50% | -0.01% | |
| Form 8-K LABCORP HOLDINGS INC. For: Aug 28 | SEC filing · Form 8-K | SEC EDGAR | -0.40% | -0.38% | |
| Labcorp to Speak at the Morgan Stanley 24th Annual Global Healthcare Conference | Press release | PR Newswire | -0.40% | -0.38% | |
| Labcorp to Offer First FDA-Cleared Blood Test to Detect Alzheimer's Disease Pathology in Both Primary and Specialty Care Settings | Press release | PR Newswire | -0.02% | +1.00% | |
| Labcorp and NACHC Launch Strategic Alliance to Strengthen Health Center Leadership and Advance Community Health | Press release | PR Newswire | +0.48% | -1.19% | |
| Form 8-K LABCORP HOLDINGS INC. For: Aug 17 | SEC filing · Form 8-K | SEC EDGAR | +0.35% | +1.67% | |
| Labcorp to Host Investor Day on September 10, 2026 | Press release | PR Newswire | +0.35% | +1.67% | |
| Form 8-K LABCORP HOLDINGS INC. For: Aug 11 | SEC filing · Form 8-K | SEC EDGAR | +0.30% | -1.00% | |
| Labcorp Announces FDA Approval of Companion Diagnostic Supporting Patients with Advanced Melanoma | Press release | PR Newswire | +0.41% | — | |
| Form 10-Q LABCORP HOLDINGS INC. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.77% | -0.10% | |
| Labcorp Launches FDA-Approved PTEN Companion Diagnostic for Prostate Cancer | Press release | PR Newswire | -0.83% | +1.83% | |
| Form 8-K LABCORP HOLDINGS INC. For: Jul 30 | SEC filing · Form 8-K | SEC EDGAR | -0.30% | +6.49% | |
| Labcorp Announces 2026 Second Quarter Results; Raises Full Year 2026 Guidance | Press release | PR Newswire | -0.30% | +6.49% | |
| Labcorp Launches Marker by Labcorp™ Genetic Health Panel, Expanding Consumer Access to Hereditary Genetic Risk Testing | Press release | PR Newswire | +0.58% | +1.93% | |
| Form 8-K LABCORP HOLDINGS INC. For: Jul 08 | SEC filing · Form 8-K | SEC EDGAR | -0.01% | -0.43% | |
| Labcorp Declares Quarterly Dividend | Press release | PR Newswire | -0.01% | -0.43% | |
| Form 8-K LABCORP HOLDINGS INC. For: Jun 30 | SEC filing · Form 8-K | SEC EDGAR | -0.04% | +1.21% | |
| Labcorp to Announce Second Quarter 2026 Financial Results on July 30, 2026 | Press release | PR Newswire | -0.04% | +1.21% | |
| Labcorp Announces Nationwide Availability of ColoSense®, the First FDA-Approved RNA-Based At-Home Colorectal Cancer Screening Test | Press release | PR Newswire | +0.90% | +0.12% | |
| Olaris and Labcorp Announce Commercial Collaboration to Expand Access to myOLARIS®- KTdx for Kidney Transplant Recipients | Press release | PR Web | +0.90% | +0.12% | |
| Labcorp Supports Multi-Institution Trial to Expand Genetic Testing in Colorectal Cancer | Press release | PR Newswire | -0.51% | -0.97% | |
| Labcorp Launches Expanded DPYD Test to Identify Cancer Patients at Risk for Severe Chemotherapy Side Effects | Press release | PR Newswire | -0.16% | +1.83% | |
| Form 8-K LABCORP HOLDINGS INC. For: May 27 | SEC filing · Form 8-K | SEC EDGAR | +0.52% | -0.67% | |
| Labcorp to Present at the Jefferies Global Healthcare Conference | Press release | PR Newswire | +0.52% | -0.67% | |
| Form 8-K LABCORP HOLDINGS INC. For: May 21 | SEC filing · Form 8-K | SEC EDGAR | +0.52% | -0.67% | |
| Form SD LABCORP HOLDINGS INC. | SEC filing · Form SD | SEC EDGAR | -0.53% | -0.25% | |
| Labcorp Launches MyLabcorp™, a New AI-Powered Mobile App Designed to Help Consumers Understand Lab Results and Track Health Trends Over Time | Press release | PR Newswire | -1.26% | +0.97% | |
| Labcorp and Epic Expand Collaboration to Advance Diagnostic Integration across Hospitals and Health Systems | Press release | PR Newswire | -0.26% | +0.53% | |
| Form 10-Q LABCORP HOLDINGS INC. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -0.11% | -0.37% | |
| Knoa Pharma Begins Operations as a New, Public Health-Focused Company Dedicated to Supporting Patients and Abating the Opioid Crisis | Press release | Business Wire | -0.16% | -0.06% | |
| Form 8-K LABCORP HOLDINGS INC. For: Apr 30 | SEC filing · Form 8-K | SEC EDGAR | -1.47% | -2.91% | |
| Labcorp Announces 2026 First Quarter Results; Raises Full Year 2026 Guidance | Press release | PR Newswire | -1.47% | -2.91% | |
| Labcorp Launches FDA-Approved Companion Diagnostic to Identify Patients with Ovarian Cancer Eligible for KEYTRUDA® | Press release | PR Newswire | -0.35% | -0.85% | |
| Labcorp Launches FDA-Cleared Fentanyl Test Delivering Results in 10 Minutes | Press release | PR Newswire | +0.45% | -0.53% | |
| Labcorp Introduces AI-Powered Real-World Data Platform with AWS and Datavant to Accelerate Alzheimer's Research | Press release | PR Newswire | +0.46% | +2.18% | |
| Children's Hospital of Philadelphia and Labcorp Announce a Collaboration to Accelerate Access to Advanced Pediatric Diagnostics Nationwide | Press release | PR Newswire | +0.20% | +1.96% | |
| Form ARS LABCORP HOLDINGS INC. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -0.16% | -1.79% | |
| Form DEF 14A LABCORP HOLDINGS INC. For: Apr 10 | SEC filing · Form DEF | SEC EDGAR | -0.24% | -1.98% | |
| Form DEFA14A LABCORP HOLDINGS INC. | SEC filing · Form DEFA14A | SEC EDGAR | +0.26% | -1.54% | |
| Form 8-K LABCORP HOLDINGS INC. For: Apr 08 | SEC filing · Form 8-K | SEC EDGAR | +0.68% | +0.32% | |
| Labcorp Declares Quarterly Dividend | Press release | PR Newswire | +0.68% | +0.32% | |
| Form 8-K LABCORP HOLDINGS INC. For: Mar 31 | SEC filing · Form 8-K | SEC EDGAR | +0.09% | +2.28% | |
| Labcorp to Announce First Quarter Financial Results on April 30, 2026 | Press release | PR Newswire | +0.09% | +2.28% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the LH section they belong to.
Where else LH is measured.
LH earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Diffusion Pharmaceuticals Inc. (DFFN) | 579 | 0.00% | 39% |
| Intuitive Surgical, Inc. (ISRG) | 579 | +0.04% | 53% |
| PFENEX INC (PFNX) | 574 | 0.00% | 45% |
| VICAL (VICL) | 574 | -0.00% | 38% |
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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Every name we’ve measured, in one place.
How the numbers are made.
How is Labcorp Holdings Inc.'s median reaction calculated?
Every labeled LH 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 577 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. 44% of LH'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 LH'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.