Martin Marietta Materials, Inc. (MLM)
MLM moved a median of +0.01% 30 minutes after news, and -0.07% by the close. How MLM actually reacts to news — the realized, point-in-time move the market made, measured across 311 labeled events over the last three years with zero look-ahead.
MLM’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.04% | 38% | 309 |
| 30-min | +0.01% | 51% | 310 |
| 60-min | +0.03% | 51% | 310 |
| to close | -0.07% | 45% | 307 |
| Middle 50% of MLM reactions | -0.44% to +0.53% |
|---|---|
| Median reaction (30-min) | +0.01% |
| Measured reactions | 311 |
Half of all Martin Marietta Materials, Inc. news events land between -0.44% and +0.53% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How MLM reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 50 | +0.05% | 56% | -0.10% |
| Analyst downgrades | 36 | +0.01% | 50% | -0.19% |
| Coverage initiations | 24 | +0.02% | 71% | +0.48% |
| Rating reiterations | 97 | -0.01% | 49% | -0.03% |
| Price-target raises | 28 | -0.05% | 43% | -0.25% |
| Price-target cuts | 27 | +0.08% | 63% | +0.17% |
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 MLM ranks against every other measured name →
That’s how MLM usually reacts — get an email when it moves on news →Email me when MLM moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to MLM's baseline. Nothing else.
Recent MLM events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form SD MARTIN MARIETTA MATERIAL | SEC filing · Form SD | SEC EDGAR | -0.46% | +1.06% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Sep 15 | SEC filing · Form 8-K | SEC EDGAR | -0.84% | -2.17% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Aug 21 | SEC filing · Form 8-K | SEC EDGAR | +0.96% | -0.72% | |
| Martin Marietta Completes Combination With Lhoist North America | Press release | GlobeNewswire | +0.96% | -0.72% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Aug 18 | SEC filing · Form 8-K | SEC EDGAR | +0.41% | +2.00% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Aug 14 | SEC filing · Form 8-K | SEC EDGAR | -0.41% | -1.35% | |
| Martin Marietta Increases Quarterly Cash Dividend | Press release | GlobeNewswire | +0.32% | +0.20% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Aug 11 | SEC filing · Form 8-K | SEC EDGAR | -0.62% | -0.41% | |
| Martin Marietta Announces Pricing Terms of Debt Offering | Press release | GlobeNewswire | -0.41% | -1.94% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Aug 10 | SEC filing · Form 8-K | SEC EDGAR | -0.17% | — | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Aug 05 | SEC filing · Form 8-K | SEC EDGAR | -0.35% | -2.94% | |
| Martin Marietta Receives Regulatory Approvals for Lhoist North America Transaction | Press release | GlobeNewswire | -0.01% | -0.04% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Aug 04 | SEC filing · Form 8-K | SEC EDGAR | -0.05% | -0.59% | |
| Form 10-Q MARTIN MARIETTA MATERIAL For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.14% | +0.28% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Jul 30 | SEC filing · Form 8-K | SEC EDGAR | -3.59% | -6.39% | |
| Martin Marietta Reports Second-Quarter 2026 Results | Press release | GlobeNewswire | -3.59% | -6.39% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Jul 10 | SEC filing · Form 8-K | SEC EDGAR | +0.90% | +1.39% | |
| Martin Marietta Announces Second-Quarter 2026 Earnings Conference Call | Press release | GlobeNewswire | -0.25% | +0.43% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Jun 27 | SEC filing · Form 8-K | SEC EDGAR | -0.20% | -1.84% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Jun 29 | SEC filing · Form 8-K | SEC EDGAR | +2.12% | +0.34% | |
| Martin Marietta to Combine with Lhoist North America in $13.5 Billion Transaction | Press release | GlobeNewswire | +2.12% | +0.34% | |
| Form 11-K MARTIN MARIETTA MATERIAL For: Dec 31 | SEC filing · Form 11-K | SEC EDGAR | +0.31% | +0.04% | |
| Form S-8 MARTIN MARIETTA MATERIAL | SEC filing · Form S-8 | SEC EDGAR | +0.09% | -0.37% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: May 14 | SEC filing · Form 8-K | SEC EDGAR | -0.41% | -1.74% | |
| Martin Marietta Declares Quarterly Cash Dividend | Press release | GlobeNewswire | -0.41% | -1.74% | |
| Form 10-Q MARTIN MARIETTA MATERIAL For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -0.01% | +1.84% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Apr 30 | SEC filing · Form 8-K | SEC EDGAR | -0.99% | +1.74% | |
| Martin Marietta Reports First-Quarter 2026 Results | Press release | GlobeNewswire | -0.99% | +1.74% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Apr 27 | SEC filing · Form 8-K | SEC EDGAR | +0.33% | +0.74% | |
| Martin Marietta Appoints Christopher W. Samborski Chief Operating Officer | Press release | GlobeNewswire | +1.16% | +0.34% | |
| Martin Marietta Announces First-Quarter 2026 Earnings Conference Call | Press release | GlobeNewswire | +0.47% | +0.68% | |
| Form ARS MARTIN MARIETTA MATERIAL For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.07% | -1.63% | |
| Form DEF 14A MARTIN MARIETTA MATERIAL For: May 14 | SEC filing · Form DEF | SEC EDGAR | +0.07% | -1.63% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Feb 23 | SEC filing · Form 8-K | SEC EDGAR | +0.73% | +1.36% | |
| Martin Marietta Completes Asset Exchange with Quikrete Holdings, Inc. | Press release | GlobeNewswire | +0.73% | +1.36% | |
| Form 10-K MARTIN MARIETTA MATERIAL For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.04% | +0.57% | |
| Form S-3ASR MARTIN MARIETTA MATERIAL | SEC filing · Form S-3ASR | SEC EDGAR | +0.18% | +0.48% | |
| Martin Marietta Declares Quarterly Cash Dividend | Press release | GlobeNewswire | +0.45% | +1.80% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Feb 11 | SEC filing · Form 8-K | SEC EDGAR | -2.08% | -0.66% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Feb 11 | SEC filing · Form 8-K | SEC EDGAR | +0.10% | -2.84% | |
| Martin Marietta Appoints George F. Schoen as Executive Vice President, General Counsel and Corporate Secretary | Press release | GlobeNewswire | -0.22% | -0.22% | |
| Martin Marietta Reports Fourth-Quarter and Full-Year 2025 Results | Press release | GlobeNewswire | +0.10% | -2.84% | |
| Martin Marietta Announces Fourth-Quarter and Full-Year 2025 Earnings Conference Call | Press release | GlobeNewswire | +0.63% | +0.83% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Dec 31 | SEC filing · Form 8-K | SEC EDGAR | +0.08% | +2.45% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Dec 19 | SEC filing · Form 8-K | SEC EDGAR | -0.79% | -1.09% | |
| Form 10-Q MARTIN MARIETTA MATERIAL For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.04% | +0.09% | |
| Form 8-K MARTIN MARIETTA MATERIAL For: Nov 04 | SEC filing · Form 8-K | SEC EDGAR | -2.23% | -1.02% | |
| Martin Marietta Reports Third-Quarter 2025 Results | Press release | GlobeNewswire | -2.23% | -1.02% | |
| Martin Marietta Announces Third-Quarter 2025 Earnings Conference Call | Press release | GlobeNewswire | -0.45% | -2.57% | |
| Martin Marietta Receives Regulatory Approvals for Quikrete Asset Exchange | Press release | GlobeNewswire | +0.28% | +1.33% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the MLM section they belong to.
Where else MLM is measured.
MLM earnings → · Analyst actions → · SEC filings →
Other Basic Materials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| APPLIED MINERALS INC (AMNL) | 315 | 0.00% | 22% |
| LONMIN PLC AMERICAN DEPOSITARY RECEIPTS - SPONSORE (LNMIY) | 312 | 0.00% | 24% |
| Stepan Company (SCL) | 311 | +0.04% | 51% |
| BHP Group PlcSponsored ADR (BBL) | 310 | +0.05% | 57% |
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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Every name we’ve measured, in one place.
How the numbers are made.
How is Martin Marietta Materials, Inc.'s median reaction calculated?
Every labeled MLM 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 311 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. 51% of MLM'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 MLM'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.