The Filings Report

Martin Marietta Materials insider trading

MLMfinancial statementsForm 4 filings on EDGAR121 transactions since Nov 1, 2024

From August 4, 2026 to November 1, 2026, 0 insiders at Martin Marietta Materials bought $0 of stock in the open market, and 0 sold $0. Officers and directors accounted for $0 of purchases and $0 of sales. The last reported transaction was an award by Petro Michael J on September 1, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through September 2, 2026; awards, option exercises, tax withholding and gifts are excluded from these totals.

Stock price and insider activity

Daily price candles with insider purchases and sales directly beneath them on the same timeline. Bars show individual days; totals sum all days in the selected period.

MLM daily priceSplit-adjusted prices in US dollars

Bought $0Sold $0Aug 4, 2026 – Nov 1, 2026

Oct 30, 2026O $537.10 · H $543.18 · L $532.08 · C $540.41Bought $0 (0)Sold $0 (0)
$459$486$513$541$5682026-08-04: open $547.84, high $556.24, low $538.51, close $555.822026-08-05: open $556.64, high $561.88, low $553.03, close $553.372026-08-06: open $554.60, high $554.60, low $536.61, close $538.282026-08-07: open $543.88, high $554.79, low $535.86, close $548.572026-08-10: open $546.95, high $549.82, low $544.33, close $549.542026-08-11: open $549.05, high $559.03, low $546.93, close $553.672026-08-12: open $554.64, high $554.64, low $541.20, close $543.902026-08-13: open $547.01, high $551.65, low $541.43, close $544.762026-08-14: open $550.25, high $551.22, low $543.34, close $547.932026-08-17: open $545.00, high $548.16, low $538.07, close $538.662026-08-18: open $538.00, high $540.43, low $522.19, close $522.812026-08-19: open $525.05, high $539.65, low $525.02, close $535.532026-08-20: open $527.11, high $534.56, low $523.82, close $525.272026-08-21: open $529.57, high $537.97, low $525.87, close $534.922026-08-24: open $537.00, high $542.18, low $529.84, close $533.112026-08-25: open $537.50, high $538.26, low $526.28, close $531.742026-08-26: open $535.65, high $541.95, low $531.63, close $532.182026-08-27: open $525.99, high $532.18, low $525.53, close $528.592026-08-28: open $532.17, high $536.27, low $525.68, close $531.052026-08-31: open $525.70, high $528.46, low $517.65, close $518.702026-09-01: open $512.11, high $512.39, low $502.56, close $504.922026-09-02: open $507.65, high $520.76, low $505.29, close $517.072026-09-03: open $524.00, high $524.98, low $508.81, close $508.942026-09-04: open $510.00, high $517.92, low $507.25, close $514.772026-09-08: open $519.93, high $519.93, low $507.56, close $511.982026-09-09: open $510.93, high $514.13, low $502.36, close $502.992026-09-10: open $495.83, high $503.27, low $491.62, close $502.472026-09-11: open $508.21, high $512.27, low $503.07, close $509.962026-09-14: open $504.91, high $508.33, low $497.11, close $500.922026-09-15: open $501.23, high $509.67, low $495.73, close $506.812026-09-16: open $505.09, high $510.81, low $494.66, close $496.762026-09-17: open $505.38, high $506.09, low $490.48, close $494.442026-09-18: open $489.71, high $494.94, low $488.74, close $490.642026-09-21: open $494.44, high $501.25, low $490.57, close $499.672026-09-22: open $508.29, high $510.81, low $493.78, close $499.342026-09-23: open $493.44, high $506.06, low $488.83, close $490.452026-09-24: open $488.97, high $490.07, low $477.40, close $480.102026-09-25: open $480.21, high $489.35, low $477.38, close $484.302026-09-28: open $481.04, high $493.71, low $476.82, close $490.772026-09-29: open $493.58, high $495.68, low $471.88, close $479.092026-09-30: open $481.44, high $485.45, low $478.53, close $479.812026-10-01: open $476.91, high $483.01, low $470.19, close $479.172026-10-02: open $483.61, high $487.98, low $480.47, close $482.272026-10-05: open $479.89, high $486.80, low $475.06, close $485.502026-10-06: open $488.07, high $492.58, low $486.27, close $489.012026-10-07: open $483.36, high $487.00, low $474.87, close $479.012026-10-08: open $473.72, high $483.49, low $472.01, close $481.572026-10-09: open $482.34, high $482.34, low $476.36, close $478.352026-10-12: open $475.70, high $484.82, low $475.70, close $477.182026-10-13: open $475.72, high $482.33, low $471.88, close $472.402026-10-14: open $468.00, high $473.40, low $464.92, close $471.102026-10-15: open $478.00, high $494.08, low $477.83, close $491.232026-10-16: open $505.78, high $507.82, low $494.21, close $500.842026-10-19: open $502.42, high $504.73, low $496.24, close $501.652026-10-20: open $504.15, high $513.45, low $498.33, close $507.582026-10-21: open $511.17, high $511.26, low $504.49, close $509.022026-10-22: open $509.34, high $518.66, low $503.02, close $517.672026-10-23: open $517.30, high $517.30, low $504.10, close $507.172026-10-26: open $508.28, high $511.56, low $502.76, close $503.922026-10-27: open $505.98, high $507.43, low $499.25, close $503.692026-10-28: open $503.70, high $511.71, low $502.83, close $510.002026-10-29: open $508.37, high $545.28, low $506.20, close $534.392026-10-30: open $537.10, high $543.18, low $532.08, close $540.41Insider purchases / sales · USD$0No open-market purchases or sales in this period.Aug 4Aug 26Sep 17Oct 9Oct 30

purchases above zero; sales below. Both use the transaction date and the same dollar scale. Hover, tap, or use arrow keys to inspect a date. Awards, exercises, tax withholding and gifts are excluded.

Dates with prices or insider activity are spaced evenly; empty weekends and holidays are omitted. Prices through Oct 30, 2026. Insider data through Nov 1, 2026. Prices are adjusted for splits; transaction values are reported dollars.

Every transaction

121 transactions from November 1, 2024 to November 1, 2026, newest first. Open-market purchases and sales are coloured; awards, exercises, tax withholding and gifts are grey and not counted.

TradedInsiderRoleTransactionSharesPriceValueHeld afterFiled
Sep 1, 2026Petro Michael JSVP and CFOaward9,331$0.00—24,322Sep 2, 2026
Aug 31, 2026Wajsgras David CDirectoraward78$518.70$40K5,106Sep 2, 2026
Aug 31, 2026Pike ThomasDirectoraward66$518.70$34K5,029Sep 2, 2026
Aug 31, 2026Lyons Martin JDirectoraward68$518.70$35K442Sep 2, 2026
Aug 21, 2026Niemann PhilippDirectoraward337$0.00—337Aug 25, 2026
Aug 3, 2026Petro Michael JSVP and CFOtax withholding368$542.27$200K14,991Aug 4, 2026
May 29, 2026Wajsgras David CDirectoraward69$581.64$40K5,028Jun 2, 2026
May 29, 2026Pike ThomasDirectoraward59$581.64$34K4,963Jun 2, 2026
May 29, 2026Lyons Martin JDirectoraward61$581.64$35K374Jun 2, 2026
May 14, 2026Wajsgras David CDirectoraward313$0.00—4,959May 18, 2026
May 14, 2026Slager Donald WDirectoraward313$0.00—5,064May 18, 2026
May 14, 2026Pike ThomasDirectoraward313$0.00—4,904May 18, 2026
May 14, 2026Perez Laree EDirectoraward313$0.00—15,730May 18, 2026
May 14, 2026Mack Mary TDirectoraward313$0.00—914May 18, 2026
May 14, 2026Lyons Martin JDirectoraward313$0.00—313May 18, 2026
May 14, 2026Foxx Anthony RDirectoraward313$0.00—2,615May 18, 2026
May 14, 2026Delly Gayla JDirectoraward313$0.00—313May 18, 2026
May 14, 2026Ables Dorothy MDirectoraward313$0.00—4,221May 18, 2026
May 1, 2026Samborski Christopher WilliamEVP, COOaward8,101$0.00—21,762May 5, 2026
Mar 1, 2026Schoen George FrederickEVP, GC and Corp. Secretaryaward23,673$0.00—23,673Mar 3, 2026
Mar 1, 2026Petro Michael JSVP and CFOaward2,960$0.00—15,359Mar 3, 2026
Mar 1, 2026Nye C HowardChairman, Pres & CEO, Directoraward5,919$0.00—176,038Mar 3, 2026
Mar 1, 2026McCunniff Donald A.EVP and CHROaward2,960$0.00—7,518Mar 3, 2026
Feb 27, 2026Wajsgras David CDirectoraward56$676.57$38K4,646Mar 2, 2026
Feb 27, 2026Pike ThomasDirectoraward47$676.57$32K4,591Mar 2, 2026
Feb 27, 2026Koraleski John JDirectoraward69$676.57$47K8,822Mar 2, 2026
Feb 24, 2026Petro Michael JSVP and CFOtax withholding94$696.85$66K12,399Feb 25, 2026
Feb 24, 2026Nye C HowardChairman, Pres & CEO, Directortax withholding1,221$696.85$851K170,119Feb 25, 2026
Feb 24, 2026Flynn Jason PaulSVP and CIOtax withholding30$696.85$21K5,494Feb 25, 2026
Feb 24, 2026Cardin Robert JSVP, Controller & CAOtax withholding103$696.85$72K12,459Feb 25, 2026
Feb 23, 2026Petro Michael JSVP and CFOtax withholding211$683.60$144K12,493Feb 25, 2026
Feb 23, 2026Nye C HowardChairman, Pres & CEO, Directortax withholding1,805$683.60$1M171,340Feb 25, 2026
Feb 23, 2026McCunniff Donald A.EVP and CHROtax withholding192$683.60$131K4,558Feb 25, 2026
Feb 23, 2026Flynn Jason PaulSVP and CIOtax withholding177$683.60$121K5,524Feb 25, 2026
Feb 23, 2026Cardin Robert JSVP, Controller & CAOtax withholding209$683.60$143K12,562Feb 25, 2026
Feb 20, 2026Petro Michael JSVP and CFOaward931$0.00—12,704Feb 24, 2026
Feb 20, 2026Nye C HowardChairman, Pres & CEO, Directoraward6,405$0.00—173,145Feb 24, 2026
Feb 20, 2026Nye C HowardChairman, Pres & CEO, Directoraward2,216$548.75$1M166,740Feb 24, 2026
Feb 20, 2026McCunniff Donald A.EVP and CHROaward1,277$0.00—4,750Feb 24, 2026
Feb 20, 2026Flynn Jason PaulSVP and CIOaward595$0.00—5,701Feb 24, 2026
Feb 20, 2026Flynn Jason PaulSVP and CIOaward592$548.75$325K5,106Feb 24, 2026
Feb 20, 2026Cardin Robert JSVP, Controller & CAOaward658$0.00—12,771Feb 24, 2026
Feb 17, 2026Petro Michael JSVP and CFOtax withholding758$666.53$505K11,773Feb 19, 2026
Feb 17, 2026Petro Michael JSVP and CFOaward1,724$0.00—12,531Feb 19, 2026
Feb 17, 2026Flynn Jason PaulSVP and CIOaward222$0.00—4,621Feb 19, 2026
Feb 17, 2026Flynn Jason PaulSVP and CIOtax withholding107$666.53$71K4,514Feb 19, 2026
Feb 17, 2026Nye C HowardChairman, Pres & CEO, Directoraward22,365$0.00—174,241Feb 19, 2026
Feb 17, 2026Nye C HowardChairman, Pres & CEO, Directortax withholding9,717$666.53$6M164,524Feb 19, 2026
Feb 17, 2026Cardin Robert JSVP, Controller & CAOaward1,869$0.00—12,935Feb 19, 2026
Feb 17, 2026Cardin Robert JSVP, Controller & CAOtax withholding822$666.53$548K12,113Feb 19, 2026

Who the insiders are

Everyone who reported a transaction since November 1, 2024, by open-market value over twelve months. Shares held are after the insider’s latest directly held transaction.

InsiderRoleLast transactionKindShares heldBought, 12 monthsSold, 12 monthsSales under a plan
Petro Michael JSVP and CFOSep 1, 2026award24,322———
Nye C HowardChairman, Pres & CEO, DirectorMar 1, 2026award176,038———
Cardin Robert JSVP, Controller & CAOFeb 24, 2026tax withholding12,459———
Bar Roselyn RExecutive Vice PresidentDec 16, 2025tax withholding62,594———
Wajsgras David CDirectorAug 31, 2026award5,106———
Pike ThomasDirectorAug 31, 2026award5,029———
McCunniff Donald A.EVP and CHROMar 1, 2026award7,518———
Koraleski John JDirectorFeb 27, 2026award8,822———
Flynn Jason PaulSVP and CIOFeb 24, 2026tax withholding5,494———
Nickolas James AJEVP and CFOFeb 24, 2025tax withholding26,643———
Brooks Oliver WSVP - Enterprise ExcellenceFeb 24, 2025tax withholding5,178———
Lyons Martin JDirectorAug 31, 2026award442———
Perez Laree EDirectorMay 14, 2026award15,730———
Slager Donald WDirectorMay 14, 2026award5,064———
Mack Mary TDirectorMay 14, 2026award914———
Foxx Anthony RDirectorMay 14, 2026award2,615———
Ables Dorothy MDirectorMay 14, 2026award4,221———
Niemann PhilippDirectorAug 21, 2026award337———
Delly Gayla JDirectorMay 14, 2026award313———
Samborski Christopher WilliamEVP, COOMay 1, 2026award21,762———
Schoen George FrederickEVP, GC and Corp. SecretaryMar 1, 2026award23,673———
Cole Sue WDirectorMay 15, 2025award20,394———
Kohn Bradley DSVP, General Counsel and SecyFeb 21, 2025award3,625———

Questions

Are Martin Marietta Materials insiders buying or selling?

Over the twelve months to November 1, 2026, no insider at Martin Marietta Materials sold stock in the open market, and no insider bought. Purchases and sales netted to zero. Only open-market purchases and sales are counted.

Who sold the most Martin Marietta Materials stock in the last year?

No insider sold Martin Marietta Materials stock in the open market in the twelve months to November 1, 2026.

Do Martin Marietta Materials executives sell under 10b5-1 plans?

There were no open-market sales in the last twelve months.

What counts as insider buying here?

Only open-market purchases (Form 4 code P) and sales (code S) by officers, directors and 10% owners. Stock awards, option exercises, shares withheld for tax and gifts are listed in the table but never counted as buying or selling.

More on Martin Marietta Materials

From Form 4, 4/A and 5 filings with the SEC. A record of insider transactions, not a recommendation.