Martin Marietta Materials (MLM) Insider Trading & Ownership $636.08 +6.47 (+1.03%) Closing price 03:59 PM EasternExtended Trading$636.01 -0.07 (-0.01%) As of 06:55 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Insider Trades Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Martin Marietta Materials (NYSE:MLM) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage0.68%Number OfInsiders Buying(Last 12 Months)1Amount OfInsider Buying(Last 12 Months)$249.90KNumber OfInsiders Selling(Last 12 Months)2Amount OfInsider Selling(Last 12 Months)$1.27M Get MLM Insider Trade Alerts Want to know when executives and insiders are buying or selling Martin Marietta Materials stock? 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MLM Insider Buying and Selling by Quarter Martin Marietta Materials Insider and Congressional Trades History Insiders and Members of Congress Insiders Only Members of Congress Only Transaction Type Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 2 Years 3 Years Time Frame Start Date End Date Export to Excel Transaction DateNameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionDetails9/24/2025Ro KhannaU.S. Congress Member (D-CA)Buy$607.07$1,001 - $15,0008/21/2025Michael T. McCaulU.S. Congress Member (R-TX)Sell$600.86$1,001 - $15,0008/8/2025Laree E PerezDirectorSell1,038$613.32$636,626.16 8/6/2025Ro KhannaU.S. Congress Member (D-CA)Sell$599.45$1,001 - $15,0008/1/2025April McClain DelaneyU.S. Congress Member (D-MD)Sell$577.15$1,001 - $15,0006/16/2025Michael T. McCaulU.S. Congress Member (R-TX)Sell$542.40$1,001 - $15,0006/10/2025Lisa C. McClainU.S. Congress Member (R-MI)Sell$554.32$1,001 - $15,0004/23/2025Ro KhannaU.S. Congress Member (D-CA)Sell$498.96$1,001 - $15,0003/5/2025Donald A MccunniffEVPSell1,332$475.00$632,700.00 3/4/2025Michael J PetroSVPBuy550$454.37$249,903.50 (Data available from 1/1/2013 forward) MLM Insider Trading Activity - Frequently Asked Questions Who is on Martin Marietta Materials' Insider Roster? The list of insiders at Martin Marietta Materials includes C Howard Nye, Craig M Latorre, Donald A Mccunniff, Laree E Perez, Michael J Petro, Roselyn R Bar, and Sue W Cole. Learn more on insiders at MLM. What percentage of Martin Marietta Materials stock is owned by insiders? 0.68% of Martin Marietta Materials stock is owned by insiders. Learn more on MLM's insider holdings. Which Martin Marietta Materials insiders have been buying company stock? The following insider purchased MLM shares in the last 24 months: Michael J Petro ($249,903.50). How much insider buying is happening at Martin Marietta Materials? Insiders have purchased a total of 550 MLM shares in the last 24 months for a total of $249,903.50 bought. Which Martin Marietta Materials insiders have been selling company stock? The following insiders have sold MLM shares in the last 24 months: C Howard Nye ($9,063,900.00), Donald A Mccunniff ($632,700.00), Laree E Perez ($636,626.16), Roselyn R Bar ($6,032,900.00), and Sue W Cole ($936,959.52). How much insider selling is happening at Martin Marietta Materials? Insiders have sold a total of 29,094 Martin Marietta Materials shares in the last 24 months for a total of $17,303,085.68 sold. Which members of congress are trading Martin Marietta Materials? Ro Khanna (D-CA) has bought shares of Martin Marietta Materials in the last year totaling $8,000. Michael T. McCaul (R-TX), Ro Khanna (D-CA), April McClain Delaney (D-MD), and Lisa C. McClain (R-MI) have sold shares totaling $48,000. Martin Marietta Materials Key ExecutivesMr. C. Howard Nye (Age 61)Chairman, CEO & President Compensation: $4.78MMr. James A. J. Nickolas (Age 53)Executive VP & CFO Compensation: $2.41MMr. Robert J. Cardin (Age 61)Senior VP, Controller & Chief Accounting Officer Compensation: $1.39MMs. Roselyn R. Bar (Age 65)Executive VP, General Counsel & Corporate Secretary Compensation: $1.93MMr. Michael J. Petro (Age 40)Senior Vice President of Strategy & Development Compensation: $1.32MSuzanne OsbergVice President of Investor RelationsMr. Kirk LightPresident of Cement & Southwest Ready MixOliver W. Brooks (Age 38)Senior Vice President of Enterprise Excellence Ron KopplinEast Division PresidentAbbott LawrenceWest Division President More Insider Trading Tools from MarketBeat Related Companies Armstrong World Industries Insider Selling CRH Insider Selling Dycom Industries Insider Selling Eagle Materials Insider Selling Graco Insider Selling Ingersoll Rand Insider Selling ITT Insider Selling Knife River Insider Selling Vulcan Materials Insider Selling Amrize Insider Selling Insider Tracking Tools CEO Purchases/Sales CFO Purchases/Sales Top Insider Buying Stocks Top Insider Selling Stocks Insider Trades Screener Insider Trades Newsletter Congressional Stock Trades Insider Trading By Country U.S. Insider Trading Activity Canadian Insider Trading Activity U.K. Insider Trading Activity Australia Insider Trading Activity Latest Articles Marvell Insiders Buy Shares—Should Investors Follow Suit?This Insider Just Made a Massive Bet on Transocean's ComebackInsider Sales Jump at Broadcom and CoreWeave: Red Flag Ahead?Oklo Insiders Sell! Oh No! This Is Why Investors Shouldn’t WorryTop Insider Buys and Sells From September: Buy, Sell, or Hold? This page (NYSE:MLM) was last updated on 10/8/2025 by MarketBeat.com Staff From Our PartnersClaim Your Share of $5.39 BILLION in AI Equity ChecksThe U.S. government just took advantage of Public Law 81-774 to crack down on AI companies... 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