Martin Marietta Materials (MLM) insider trading
Insider activity, historical context and SEC filings · data through Nov 13, 2026
No open-market insider trades in the last 12 months.
Label: Quiet · based on open-market trades (codes P and S), last 12 months. Not a rating or advice.MLM insider transactions (Form 4)
No open-market buys or sales in the last 12 months. Martin Marietta Materials insiders filed 60 Form 4 transactions, all stock awards, option exercises or shares withheld for tax. These come from pay packages, so they say little about what insiders think of the stock.
| Filed | Insider | Type | Shares |
|---|---|---|---|
| Sep 2 | David C. Wajsgras · Director | Stock award (A) | 78 |
| Sep 2 | Martin J. Lyons · Director | Stock award (A) | 68 |
| Sep 2 | Thomas Pike · Director | Stock award (A) | 66 |
| Sep 2 | Michael J. Petro · CFO | Stock award (A) | 9,331 |
| Aug 25 | Philipp Niemann · Director | Stock award (A) | 337 |
| Aug 4 | Michael J. Petro · CFO | Tax withholding (F) | 368 |
| Jun 2 | David C. Wajsgras · Director | Stock award (A) | 69 |
| Jun 2 | Martin J. Lyons · Director | Stock award (A) | 61 |
| Jun 2 | Thomas Pike · Director | Stock award (A) | 59 |
| May 18 | Dorothy M. Ables · Director | Stock award (A) | 313 |
| May 18 | Gayla J. Delly · Director | Stock award (A) | 313 |
| May 18 | Anthony R. Foxx · Director | Stock award (A) | 313 |
| May 18 | Martin J. Lyons · Director | Stock award (A) | 313 |
| May 18 | Mary T. Mack · Director | Stock award (A) | 313 |
| May 18 | Laree E. Perez · Director | Stock award (A) | 313 |
| May 18 | Thomas Pike · Director | Stock award (A) | 313 |
| May 18 | Donald W. Slager · Director | Stock award (A) | 313 |
| May 18 | David C. Wajsgras · Director | Stock award (A) | 313 |
| May 5 | Christopher William Samborski · COO | Stock award (A) | 8,101 |
| Mar 3 | Donald A. McCunniff · Evp And Chro | Stock award (A) | 2,960 |
| Mar 3 | C. Howard Nye · CEO | Stock award (A) | 5,919 |
| Mar 3 | Michael J. Petro · CFO | Stock award (A) | 2,960 |
| Mar 3 | George Frederick Schoen · Evp | Stock award (A) | 23,673 |
| Mar 2 | John J. Koraleski · Director | Stock award (A) | 69 |
| Mar 2 | David C. Wajsgras · Director | Stock award (A) | 56 |
Similar past setups: not applicable. MLM has had no open-market insider purchases in the last 12 months, so there's no buying setup to compare with history. When insiders buy, this section shows how 16,899 similar past buys did over 90 days. How we calculate this →
Play with MLM in the Research Lab
MLM has no open-market insider buys in the last 12 months. Try the tools with any setup.
Quick backtest: did buys like this beat the market?
Tap a setting to see how 16,899 past insider buys did.
Share price and insider trades
Martin Marietta Materials insider trading at a glance (Nov 13, 2026): in the past 12 months, 0 insiders bought $0 and 0 sold $0 of MLM stock on the open market; P/E 38.9 vs. a sector median of 20.8.
By InsiderPrint Research Desk · Updated · Sources: SEC EDGAR Form 4 filings, FINRA short-sale volume · How we calculate this
Valuation, profit and volume
Source: Yahoo Finance, as of Nov 12, 2026. Volume and paper profit use daily closing prices.
Summary
No open-market purchases or sales by Martin Marietta Materials insiders were reported in the past 12 months. Insiders did file 60 other Form 4 transactions (stock awards, option exercises and shares withheld for tax), which are compensation, not trades on the open market.
MLM short selling
Daily short-sale volume as a share of trading volume (FINRA), with the 20-day average.
This is short volume from off-exchange trades, not short interest. It includes market makers' routine hedging, so 40–50% is normal; what stands out is a ratio well above the stock's own average. Insiders buying while shorts pile in →
Insiders at Martin Marietta Materials
| Insider | Bought | Sold | Last filing | Past buys beat S&P | Score |
|---|---|---|---|---|---|
| David C. WajsgrasDirector | — | — | Sep 2, 2026 | — | — |
| Martin J. LyonsDirector | — | — | Sep 2, 2026 | — | — |
| Thomas PikeDirector | — | — | Sep 2, 2026 | 0 of 1 | — |
| Michael J. PetroCFO | — | — | Sep 2, 2026 | 1 of 1 | — |
| Philipp NiemannDirector | — | — | Aug 25, 2026 | — | — |
| Dorothy M. AblesDirector | — | — | May 18, 2026 | — | — |
| Gayla J. DellyDirector | — | — | May 18, 2026 | — | — |
| Anthony R. FoxxDirector | — | — | May 18, 2026 | — | — |
| Mary T. MackDirector | — | — | May 18, 2026 | — | — |
| Laree E. PerezDirector | — | — | May 18, 2026 | — | — |
| Donald W. SlagerDirector | — | — | May 18, 2026 | — | — |
| Christopher William SamborskiCOO | — | — | May 5, 2026 | — | — |
| Donald A. McCunniffEvp And Chro | — | — | Mar 3, 2026 | — | — |
| C. Howard NyeCEO, Chair | — | — | Mar 3, 2026 | — | — |
| George Frederick SchoenEvp, Gc And Corp. Secretary | — | — | Mar 3, 2026 | — | — |
| John J. KoraleskiDirector | — | — | Mar 2, 2026 | 1 of 1 | — |
| Robert J. CardinSvp, Controller & Cao | — | — | Feb 25, 2026 | — | — |
| Jason Paul FlynnSvp And Cio | — | — | Feb 25, 2026 | — | — |
| Roselyn R. BarPresident | — | — | Dec 17, 2025 | — | — |
Board links: companies that share insiders with MLM
Directors and executives who filed Form 4s for MLM and another company in the last 12 months.
- AEEAmeren Martin J. Lyons Director here · CEO, President at AEE · latest filing Nov 13, 2026
- AVGOBroadcom Gayla J. Delly Director here · Director at AVGO · latest filing Jul 14, 2026
- CDWCDW Anthony R. Foxx Director here · Director at CDW · latest filing Sep 14, 2026
- GDGeneral Dynamics C. Howard Nye CEO, Chair here · Director at GD · latest filing Sep 18, 2026
- NXPINXP Semiconductors Anthony R. Foxx Director here · Director at NXPI · latest filing Nov 9, 2026
Insider activity at other Materials companies
Same sector, ranked by insider buying in the last 90 days.
MLM stock: common questions
Are Martin Marietta Materials insiders buying MLM stock?
No. No Martin Marietta Materials insider reported an open-market purchase of MLM in the past 12 months.
Are Martin Marietta Materials insiders selling MLM stock?
No. No Martin Marietta Materials insider reported an open-market sale of MLM in the past 12 months.
Why are there no MLM insider trades?
Martin Marietta Materials insiders reported no open-market purchases or sales in the past 12 months. Their 60 Form 4 filings were stock awards, option exercises and shares withheld for tax, which come from pay packages rather than a decision to buy or sell.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is MLM's P/E ratio?
MLM trades at about 38.9 times trailing earnings, compared with a median of 20.8 for the Materials sector.
What is MLM's 52-week range?
Over the past year MLM has traded between $471.10 and $705.09. It last closed at $513.61 on Nov 13, 2026.