NewMarket Corp (NEU)
NEU moved a median of 0.00% 30 minutes after news, and +0.15% by the close. How NEU actually reacts to news — the realized, point-in-time move the market made, measured across 183 labeled events over the last three years with zero look-ahead.
NEU’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 25% | 179 |
| 30-min | 0.00% | 37% | 181 |
| 60-min | -0.01% | 45% | 182 |
| to close | +0.15% | 54% | 182 |
| Middle 50% of NEU reactions | -0.48% to +0.25% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 183 |
Half of all NewMarket Corp news events land between -0.48% and +0.25% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when NEU moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to NEU's baseline. Nothing else.
Recent NEU events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| NewMarket Corporation Schedules Conference Call and Webcast to Review Third Quarter 2026 Results | Press release | Business Wire | -0.49% | -0.18% | |
| Form 8-K NEWMARKET CORP For: Aug 13 | SEC filing · Form 8-K | SEC EDGAR | +0.61% | +1.41% | |
| NewMarket Corporation Announces Quarterly Dividend | Press release | Business Wire | +0.61% | +1.41% | |
| Form 10-Q NEWMARKET CORP For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.85% | +4.21% | |
| Form 8-K NEWMARKET CORP For: Jul 29 | SEC filing · Form 8-K | SEC EDGAR | +0.85% | +4.21% | |
| NewMarket Corporation Reports Second Quarter and First Half 2026 Results | Press release | Business Wire | +0.85% | +4.21% | |
| NewMarket Corporation Schedules Conference Call and Webcast to Review Second Quarter 2026 Results | Press release | Business Wire | -0.30% | -4.00% | |
| Form 11-K NEWMARKET CORP For: Dec 31 | SEC filing · Form 11-K | SEC EDGAR | +0.00% | +2.28% | |
| Form 10-Q NEWMARKET CORP For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -0.16% | +8.98% | |
| Form 8-K NEWMARKET CORP For: Apr 23 | SEC filing · Form 8-K | SEC EDGAR | +0.07% | +2.12% | |
| NewMarket Corporation Announces Quarterly Dividend | Press release | Business Wire | +0.07% | +2.12% | |
| Form 8-K NEWMARKET CORP For: Apr 22 | SEC filing · Form 8-K | SEC EDGAR | -0.16% | +8.98% | |
| NewMarket Corporation Reports First Quarter 2026 Results | Press release | Business Wire | -0.16% | +8.98% | |
| NewMarket Corporation Schedules Conference Call and Webcast to Review First Quarter 2026 Results | Press release | Business Wire | -0.68% | +0.94% | |
| Form ARS NEWMARKET CORP For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -0.31% | -1.85% | |
| Form DEF 14A NEWMARKET CORP For: Apr 23 | SEC filing · Form DEF | SEC EDGAR | -0.31% | -1.85% | |
| Form DEFA14A NEWMARKET CORP | SEC filing · Form DEFA14A | SEC EDGAR | -0.31% | -1.85% | |
| Form 8-K NEWMARKET CORP For: Feb 26 | SEC filing · Form 8-K | SEC EDGAR | -0.11% | +0.23% | |
| NewMarket Corporation Increases Quarterly Dividend | Press release | Business Wire | -0.11% | +0.23% | |
| Form 8-K NEWMARKET CORP For: Feb 18 | SEC filing · Form 8-K | SEC EDGAR | +0.79% | +0.21% | |
| Form 10-K NEWMARKET CORP For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.33% | -1.06% | |
| Form 8-K NEWMARKET CORP For: Feb 11 | SEC filing · Form 8-K | SEC EDGAR | -4.25% | -15.20% | |
| NewMarket Corporation Reports Fourth Quarter and Full Year 2025 Results | Press release | Business Wire | -4.25% | -15.20% | |
| NewMarket Corporation Schedules Conference Call and Webcast to Review Fourth Quarter and Full Year 2025 Financial Results | Press release | Business Wire | +0.08% | -1.06% | |
| Form 8-K NEWMARKET CORP For: Dec 09 | SEC filing · Form 8-K | SEC EDGAR | +0.63% | +2.64% | |
| Form 8-K NEWMARKET CORP For: Oct 31 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -3.17% | |
| Form 10-Q NEWMARKET CORP For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +3.80% | |
| Form 8-K NEWMARKET CORP For: Oct 30 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +3.80% | |
| NewMarket Corporation Increases Quarterly Dividend | Press release | Business Wire | +0.00% | +3.80% | |
| NewMarket Corporation Reports Third Quarter and First Nine Months 2025 Results | Press release | Business Wire | +0.00% | +3.80% | |
| NewMarket Corporation Schedules Conference Call and Webcast to Review Third Quarter 2025 Financial Results | Press release | Business Wire | +0.02% | +0.90% | |
| NewMarket Corporation Completes the Acquisition of Calca Solutions, LLC | Press release | Business Wire | -0.15% | -0.44% | |
| NewMarket Corporation Announces the Acquisition of Calca Solutions, LLC | Press release | Business Wire | +0.90% | +1.68% | |
| Afton Chemical Launches HiTEC® 65522 Gasoline Performance Additive Series Approved for TOP TIER+™ Gasoline | Press release | Business Wire | +0.00% | +2.03% | |
| Form 8-K NEWMARKET CORP For: Aug 07 | SEC filing · Form 8-K | SEC EDGAR | -0.07% | +1.56% | |
| NewMarket Corporation Announces Quarterly Dividend | Press release | Business Wire | -0.07% | +1.56% | |
| Form 10-Q NEWMARKET CORP For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +3.75% | +5.37% | |
| Form 8-K NEWMARKET CORP For: Jul 30 | SEC filing · Form 8-K | SEC EDGAR | +3.75% | +5.37% | |
| NewMarket Corporation Reports Second Quarter and First Half 2025 Results | Press release | Business Wire | +3.75% | +5.37% | |
| NewMarket Corporation Schedules Conference Call and Webcast to Review Second Quarter 2025 Financial Results | Press release | Business Wire | +0.00% | +1.42% | |
| Form 11-K NEWMARKET CORP For: Dec 31 | SEC filing · Form 11-K | SEC EDGAR | — | +0.32% | |
| Form 10-Q NEWMARKET CORP For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +5.60% | |
| Form 8-K NEWMARKET CORP For: Apr 24 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.60% | |
| NewMarket Corporation Announces Approval of AMPAC Expansion | Press release | Business Wire | +0.00% | -0.60% | |
| NewMarket Corporation Announces Quarterly Dividend Q2 | Press release | Business Wire | +0.00% | -0.60% | |
| Form 8-K NEWMARKET CORP For: Apr 23 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +5.60% | |
| NewMarket Corporation Reports First Quarter 2025 Results | Press release | Business Wire | +0.00% | +5.60% | |
| American Pacific Corporation Announces Production Expansion | Press release | Business Wire | +0.00% | -0.66% | |
| NewMarket Corporation Schedules Conference Call and Webcast to Review First Quarter 2025 Financial Results | Press release | Business Wire | -1.85% | +0.24% | |
| Form ARS NEWMARKET CORP For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.00% | -4.86% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the NEU section they belong to.
Where else NEU is measured.
NEU earnings → · Analyst actions → · SEC filings →
Other Basic Materials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| POSCO Holdings Inc. American Depositary Shares (Each representing 1/4th of a share of) (PKX) | 184 | +0.04% | 51% |
| Hudbay Minerals Inc. Ordinary Shares (Canada) (HBM) | 183 | 0.00% | 49% |
| Vista Gold Corp (VGZ) | 180 | -0.01% | 43% |
| SunCoke Energy, Inc. (SXC) | 177 | -0.11% | 41% |
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 Basic Materials names, measured the same way →
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Browse all tickers
Every name we’ve measured, in one place.
How the numbers are made.
How is NewMarket Corp's median reaction calculated?
Every labeled NEU 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 183 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. 37% of NEU'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 NEU'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.