Core & Main (CNM) Insider Trading & Ownership $64.70 -0.47 (-0.72%) Closing price 08/29/2025 03:59 PM EasternExtended Trading$64.72 +0.03 (+0.04%) As of 08/29/2025 04:38 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 ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Core & Main (NYSE:CNM) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage3.53%Number OfInsiders Buying(Last 12 Months)0Number OfInsiders Selling(Last 12 Months)12Amount OfInsider Selling(Last 12 Months)$60.42M Get CNM Insider Trade Alerts Want to know when executives and insiders are buying or selling Core & Main stock? 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CNM Insider Buying and Selling by Quarter Core & Main 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 TransactionDetails8/18/2025Mark R WitkowskiCEOSell100,000$64.08$6,408,000.00 7/22/2025Robyn L BradburyCFOSell5,000$64.51$322,550.00 7/18/2025James G CastellanoDirectorSell43,994$61.98$2,726,748.12 7/18/2025Orvin T KimbroughDirectorSell23,962$61.77$1,480,132.74 7/17/2025Mark R WitkowskiCEOSell100,000$61.26$6,126,000.00 7/7/2025Stephen O LeclairInsiderSell44,972$61.91$2,784,216.52 7/3/2025Stephen O LeclairInsiderSell80,028$62.27$4,983,343.56 7/1/2025Robyn L BradburyCFOSell25,000$60.49$1,512,250.00 6/17/2025Lisa C. McClainU.S. Congress Member (R-MI)Sell$55.61$1,001 - $15,0006/11/2025Lisa C. McClainU.S. Congress Member (R-MI)Buy$57.46$1,001 - $15,0006/9/2025Mark G WhittenburgGeneral CounselSell49,100$60.03$2,947,473.00 6/6/2025Mark G WhittenburgGeneral CounselSell900$60.03$54,027.00 Get Insider Trades Delivered To Your InboxEnter your email address below to receive a concise daily summary of insider buying activity, insider selling activity and changes in hedge fund holdings. 6/3/2025Laura K SchneiderInsiderSell45,695$56.25$2,570,343.75 5/28/2025John R SchallerEVPSell9,794$55.00$538,670.00 4/28/2025John Weldon StephensCAOSell10,214$53.02$541,546.28 4/7/2025April McClain DelaneyU.S. Congress Member (D-MD)Buy$45.35$1,001 - $15,0004/2/2025John Weldon StephensCAOSell41,963$50.48$2,118,292.24 3/10/2025John R SchallerEVPSell21,868$46.82$1,023,859.76 2/10/2025Bradford A CowlesPresidentSell25,000$54.48$1,362,000.00 2/8/2025April McClain DelaneyU.S. Congress Member (D-MD)Buy$54.55$1,001 - $15,0001/15/2025Mark G WhittenburgGeneral CounselSell1,974$55.29$109,142.46 1/14/2025Bradford A CowlesPresidentSell12,500$54.07$675,875.00 1/10/2025Bradford A CowlesPresidentSell12,500$50.50$631,250.00 1/10/2025John R SchallerEVPSell60,452$50.57$3,057,057.64 1/10/2025Mark G WhittenburgGeneral CounselSell50,000$50.49$2,524,500.00 12/3/2024Bradford A CowlesPresidentSell50,000$55.07$2,753,500.00 12/3/2024Jeffrey D GilesEVPSell25,000$54.71$1,367,750.00 12/3/2024Margaret NewmanDirectorSell15,000$55.25$828,750.00 12/3/2024Stephen O LeclairCEOSell200,000$54.88$10,976,000.00 (Data available from 1/1/2013 forward) CNM Insider Trading Activity - Frequently Asked Questions Who is on Core & Main's Insider Roster? The list of insiders at Core & Main includes Bradford A Cowles, Cd&R Investment Associates X,, James G Castellano, Jeffrey D Giles, John R Schaller, John Weldon Stephens, Laura K Schneider, Margaret Newman, Mark G Whittenburg, Mark R Witkowski, Orvin T Kimbrough, Robyn L Bradbury, and Stephen O Leclair. Learn more on insiders at CNM. What percentage of Core & Main stock is owned by insiders? 3.53% of Core & Main stock is owned by insiders. Learn more on CNM's insider holdings. Which Core & Main insiders have been selling company stock? The following insiders have sold CNM shares in the last 24 months: Bradford A Cowles ($7,845,875.00), Cd&R Investment Associates X, ($3,900,432,912.78), James G Castellano ($3,822,175.12), Jeffrey D Giles ($4,758,950.00), John R Schaller ($6,669,087.40), John Weldon Stephens ($8,053,912.64), Laura K Schneider ($11,047,343.75), Margaret Newman ($828,750.00), Mark G Whittenburg ($11,234,642.46), Mark R Witkowski ($22,174,900.00), Orvin T Kimbrough ($1,928,782.74), Robyn L Bradbury ($1,834,800.00), and Stephen O Leclair ($31,463,560.08). How much insider selling is happening at Core & Main? Insiders have sold a total of 114,296,753 Core & Main shares in the last 24 months for a total of $4,012,095,691.97 sold. Which members of congress are trading Core & Main? Lisa C. McClain (R-MI) and April McClain Delaney (D-MD) have bought shares of Core & Main in the last year totaling $24,000. Lisa C. McClain (R-MI) has sold shares totaling $8,000. Core & Main Key ExecutivesMr. Stephen O. LeClair (Age 55)Chair & Chief Executive Officer Compensation: $2.59M2 recent tradesMr. John R. Schaller (Age 68)President Compensation: $1.04M2 recent tradesMr. Bradford A. Cowles (Age 53)President Compensation: $925.99kMr. Mark R. Witkowski (Age 48)Chief Financial Officer Compensation: $1.27M2 recent tradesMr. Mark G. Whittenburg (Age 56)General Counsel & Secretary Compensation: $1.1M2 recent tradesMs. Carrie BusbeeChief Information OfficerMs. Robyn BradburyVice President of Finance & Investor Relations2 recent tradesJennifer NoonanDirector of Marketing & CommunicationsMr. Jeffrey D. 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Insiders Pile Into These 3 Healthcare StocksInsiders Trade Millions in NVIDIA-Linked Navitas, Hims, & Shift45 Stocks Insiders Are Selling That Analysts Say Buy This page (NYSE:CNM) was last updated on 8/30/2025 by MarketBeat.com Staff From Our PartnersWhat Steve Bannon revealed about Trump’s gold playA Trump advisor just said 3 words that could reset the dollar. It’s a gold move nobody saw coming—and your ...Reagan Gold Group | SponsoredINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredFree: The Crypto Summit That Could Change Your Life27 industry leaders share urgent market intel (free access)... For a very limited time, you can claim your ...Crypto 101 Media | Sponsored[No Brainer Gold Play]: “Show me a better investment.”A Historic Gold Announcement Is About to Rock Wall Street? 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