Avantor, Inc. (AVTR)
AVTR moved a median of +0.04% 30 minutes after news, and +0.18% by the close. How AVTR actually reacts to news — the realized, point-in-time move the market made, measured across 1,086 labeled events over the last three years with zero look-ahead.
AVTR’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 50% | 1,082 |
| 30-min | +0.04% | 52% | 1,082 |
| 60-min | +0.02% | 50% | 1,082 |
| to close | +0.18% | 54% | 1,062 |
| Middle 50% of AVTR reactions | -0.58% to +0.56% |
|---|---|
| Median reaction (30-min) | +0.04% |
| Measured reactions | 1,086 |
Half of all Avantor, Inc. news events land between -0.58% 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 AVTR reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 12 | +0.08% | 50% | -0.91% |
| Analyst downgrades | 41 | +0.35% | 56% | +0.34% |
| Coverage initiations | 16 | +1.00% | 88% | +0.63% |
| Rating reiterations | 95 | -0.17% | 37% | -0.45% |
| Price-target raises | 27 | +0.12% | 56% | -0.67% |
| Price-target cuts | 34 | -0.19% | 38% | -0.64% |
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 AVTR ranks against every other measured name →
That’s how AVTR usually reacts — get an email when it moves on news →Email me when AVTR moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to AVTR's baseline. Nothing else.
Recent AVTR events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Bronstein, Gewirtz & Grossman, LLC Encourages Avantor, Inc. (AVTR) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.06% | +0.09% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Avantor, Inc. (AVTR) And Encourages Stockholders to Connect | Press release | ACCESS Newswire | -0.67% | -1.40% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.00% | +0.82% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Avantor, Inc. (AVTR) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | +0.10% | -1.34% | |
| Avantor® to Report Third Quarter 2026 Earnings on Wednesday, October 28, 2026 | Press release | PR Newswire | +2.63% | +2.80% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.03% | +0.83% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Avantor, Inc. (AVTR) And Encourages Shareholders to Connect | Press release | ACCESS Newswire | -0.13% | +2.16% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Avantor, Inc. (AVTR) And Encourages Shareholders to Reach Out | Press release | ACCESS Newswire | -0.42% | -2.26% | |
| Avantor appoints new Chief Financial Officer | Press release | PR Newswire | +0.39% | -1.88% | |
| Form 8-K Avantor, Inc. For: Sep 17 | SEC filing · Form 8-K | SEC EDGAR | +0.39% | -1.88% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Avantor, Inc. (AVTR) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | +0.39% | -1.88% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -0.10% | -0.99% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Avantor, Inc. (AVTR) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.20% | +1.12% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Avantor, Inc. (AVTR) And Encourages Stockholders to Reach Out | Press release | ACCESS Newswire | +0.07% | +1.98% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Avantor, Inc. (AVTR) And Encourages Stockholders to Connect | Press release | ACCESS Newswire | +0.21% | -1.35% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -0.14% | +0.00% | |
| Form 8-K/A Avantor, Inc. For: Apr 17 | SEC filing · Form 8-K | SEC EDGAR | +0.48% | +0.55% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Avantor, Inc. (AVTR) And Encourages Shareholders to Reach Out | Press release | ACCESS Newswire | +0.10% | -0.10% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Avantor, Inc. (AVTR) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.67% | -0.21% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Avantor, Inc. (AVTR) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.00% | -0.11% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Avantor, Inc. (AVTR) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.07% | +0.47% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.81% | — | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Avantor, Inc. (AVTR) And Encourages Stockholders to Connect | Press release | ACCESS Newswire | +0.07% | +0.77% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -1.00% | -2.15% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Avantor, Inc. (AVTR) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | +0.18% | +0.25% | |
| Avantor® Reports Second Quarter 2026 Results | Press release | PR Newswire | +0.90% | +2.71% | |
| Form 10-Q Avantor, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.90% | +2.71% | |
| Form 8-K Avantor, Inc. For: Jul 29 | SEC filing · Form 8-K | SEC EDGAR | +0.90% | +2.71% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Avantor, Inc. (AVTR) Investors to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.08% | +3.41% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Avantor, Inc. (AVTR) And Encourages Shareholders to Reach Out | Press release | ACCESS Newswire | +0.28% | +3.53% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Avantor, Inc. (AVTR) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.91% | -2.91% | |
| Form 8-K Avantor, Inc. For: Jul 14 | SEC filing · Form 8-K | SEC EDGAR | -0.91% | -2.91% | |
| Avantor's® NuSil® Brand Expands Partnership with the Population Council to Develop Long-Acting HIV Prevention Product | Press release | PR Newswire | -0.95% | +6.91% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Avantor, Inc. (AVTR) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.05% | +4.01% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.58% | +2.23% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Avantor, Inc. (AVTR) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.25% | +0.99% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.00% | +1.73% | |
| Avantor® to Report Second Quarter 2026 Earnings on Wednesday, July 29, 2026 | Press release | PR Newswire | -0.40% | +0.10% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.35% | -0.15% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Avantor, Inc. (AVTR) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | -2.52% | -2.62% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Avantor, Inc. (AVTR) Investors to Inquire about Securities Investigation | Press release | ACCESS Newswire | -0.35% | +0.00% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Avantor, Inc. (AVTR) And Encourages Stockholders to Reach Out | Press release | ACCESS Newswire | +0.53% | -1.58% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Avantor, Inc. (AVTR) And Encourages Shareholders to Reach Out | Press release | ACCESS Newswire | +0.16% | +1.95% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Avantor, Inc. (AVTR) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.05% | +0.05% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Avantor, Inc. (AVTR) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.00% | +0.16% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.00% | +0.62% | |
| Form SD Avantor, Inc. | SEC filing · Form SD | SEC EDGAR | -0.45% | +2.45% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Avantor, Inc. (AVTR) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.34% | +4.63% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | -1.05% | +0.74% | |
| Avantor, Inc. (AVTR) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.00% | -0.19% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the AVTR section they belong to.
Where else AVTR is measured.
AVTR earnings → · Analyst actions → · SEC filings →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Avantor, Inc.'s median reaction calculated?
Every labeled AVTR 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 1,086 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. 52% of AVTR'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 AVTR'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.