Stock Scorer

Core & Main, Inc. (CNM) · Insider trading

What Core & Main's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.

Bought, 12 months
$195,083
1 insider, 2 trades
Sold, 12 months
$262,718
1 insider, 100% under a plan
Net, 12 months
−$67,635
bought less sold
Latest filing
2026-08-05
filings read to 2026-10-19

Bought and sold at the market, by month

Two years. Purchases above the line, sales below, in dollars.

2024-12: $15.93M sold 2025-01: $9.65M sold 2025-01 2025-02: $1.36M sold 2025-03: $1.89M sold 2025-04: $4.34M sold 2025-05: $538,670 sold 2025-06: $5.57M sold 2025-07: $19.94M sold 2025-07 2025-08: $6.41M sold 2026-01 2026-04: $99,980 bought 2026-04: $262,718 sold 2026-07: $95,103 bought 2026-07
Bought Sold Largest month: $19.94M

Who traded, two years

InsiderBoughtSold TradesLast tradeHolds after
LeClair Stephen ODirector, Executive Chair – $18.74M 3 2025-07-07 70,736
Witkowski Mark RDirector, Chief Executive Officer – $12.53M 3 2025-08-18 35,847
Whittenburg Mark GGeneral Counsel and Secretary – $8.28M 5 2025-06-09 9,691
Schaller John RExecutive Vice President – $5.49M 6 2025-05-28 19,689
Cowles Bradford APresident – $5.42M 4 2025-02-10 16,010
Stephens John WeldonChief Accounting Officer – $4.34M 3 2025-04-29 4,120
Castellano James GDirector – $2.73M 1 2025-07-18 –
Schneider Laura KChief Human Resources Officer – $2.57M 1 2025-06-03 12,873
Bradbury Robyn LChief Financial Officer – $2.10M 6 2026-04-17 15,853
Kimbrough Orvin TDirector – $1.48M 1 2025-07-18 13,958
Giles Jeffrey DEVP, Corporate Department – $1.37M 1 2024-12-03 11,615
Newman MargaretDirector – $828,750 1 2024-12-03 11,769
Hope James DDirector $195,083 – 2 2026-07-06 11,805

Open-market purchases and sales

Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.

DateInsiderTradeShares PriceValueHolds afterFiling
2026-07-06 Hope James DDirector Buy 2,067 46.01 $95,103 11,805 Form 4
2026-04-17 Bradbury Robyn LChief Financial Officer Saleplan 1,647 51.94 $85,545 15,853 Form 4
2026-04-17 Bradbury Robyn LChief Financial Officer Saleplan 3,353 52.84 $177,173 12,500 Form 4
2026-04-07 Hope James DDirector Buy 1,972 50.70 $99,980 6,939 Form 4
2025-08-18 Witkowski Mark RDirector, Chief Executive Officer Saleplan 100,000 64.08 $6.41M 35,847 Form 4
2025-07-22 Bradbury Robyn LChief Financial Officer Saleplan 5,000 64.51 $322,550 8,555 Form 4
2025-07-18 Kimbrough Orvin TDirector Saleplan 23,962 61.77 $1.48M 13,958 Form 4
2025-07-18 Castellano James GDirector Saleplanindirect 43,994 61.98 $2.73M 0 Form 4
2025-07-17 Witkowski Mark RDirector, Chief Executive Officer Saleplan 72,331 61.12 $4.42M 63,516 Form 4
2025-07-17 Witkowski Mark RDirector, Chief Executive Officer Saleplan 27,669 61.63 $1.71M 35,847 Form 4
2025-07-07 LeClair Stephen ODirector, Executive Chair Sale 44,972 61.91 $2.78M 70,736 Form 4
2025-07-03 LeClair Stephen ODirector, Executive Chair Sale 80,028 62.27 $4.98M 70,736 Form 4
2025-07-01 Bradbury Robyn LChief Financial Officer Saleplan 13,363 59.97 $801,379 20,192 Form 4
2025-07-01 Bradbury Robyn LChief Financial Officer Saleplan 11,318 61.08 $691,303 8,874 Form 4
2025-07-01 Bradbury Robyn LChief Financial Officer Saleplan 319 61.58 $19,644 8,555 Form 4
2025-06-09 Whittenburg Mark GGeneral Counsel and Secretary Saleplan 49,100 60.03 $2.95M 9,691 Form 4
2025-06-06 Whittenburg Mark GGeneral Counsel and Secretary Saleplan 900 60.03 $54,027 9,691 Form 4
2025-06-03 Schneider Laura KChief Human Resources Officer Saleplan 45,695 56.25 $2.57M 12,873 Form 4
2025-05-28 Schaller John RExecutive Vice President Saleplan 9,794 55.00 $538,670 19,689 Form 4
2025-04-29 Stephens John WeldonChief Accounting Officer Saleplan 31,750 53.03 $1.68M 4,120 Form 4
2025-04-28 Stephens John WeldonChief Accounting Officer Saleplan 10,214 53.02 $541,546 4,120 Form 4
2025-04-02 Stephens John WeldonChief Accounting Officer Saleplan 41,963 50.48 $2.12M 4,120 Form 4
2025-03-11 Schaller John RExecutive Vice President Saleplan 19,292 45.00 $868,140 15,474 Form 4
2025-03-10 Schaller John RExecutive Vice President Saleplan 21,868 46.82 $1.02M 16,452 Form 4
2025-02-10 Cowles Bradford APresident Saleplan 25,000 54.48 $1.36M 16,010 Form 4
2025-01-16 Whittenburg Mark GGeneral Counsel and Secretary Saleplan 48,026 55.13 $2.65M 7,667 Form 4
2025-01-15 Whittenburg Mark GGeneral Counsel and Secretary Saleplan 1,974 55.29 $109,142 7,667 Form 4
2025-01-14 Cowles Bradford APresident Saleplan 12,500 54.07 $675,875 16,010 Form 4
2025-01-10 Cowles Bradford APresident Saleplan 12,500 50.50 $631,250 16,010 Form 4
2025-01-10 Schaller John RExecutive Vice President Saleplan 37,984 50.56 $1.92M 18,498 Form 4
2025-01-10 Schaller John RExecutive Vice President Saleplan 600 51.41 $30,846 17,898 Form 4
2025-01-10 Schaller John RExecutive Vice President Saleplan 21,868 50.56 $1.11M 17,898 Form 4
2025-01-10 Whittenburg Mark GGeneral Counsel and Secretary Saleplan 50,000 50.49 $2.52M 7,667 Form 4
2024-12-03 LeClair Stephen ODirector, Chief Executive Officer Saleplan 200,000 54.88 $10.98M 92,349 Form 4
2024-12-03 Newman MargaretDirector Saleplan 15,000 55.25 $828,750 11,769 Form 4
2024-12-03 Cowles Bradford APresident Saleplan 50,000 55.07 $2.75M 18,423 Form 4
2024-12-03 Giles Jeffrey DEVP, Corporate Department Saleplan 25,000 54.71 $1.37M 11,615 Form 4

Grants, exercises and other transactions

Pay, tax and paperwork rather than a choice to trade at the market price. Two years.

51 × shares withheld for tax37 × grant or award23 × conversion8 × option exercise8 × other2 × gift
Show them
DateInsiderWhatShares PriceHolds afterFiling
2026-08-04 Harper Carla DSenior VP, Human Resources Shares withheld for tax F −242 46.32 13,064 Form 4
2026-07-22 Huebert Michael G.President Shares withheld for tax F −1,301 43.75 24,036 Form 4
2026-06-23 Buck Robert MDirector Grant or award A +2,799 – 15,849 Form 4
2026-06-23 Kimbrough Orvin TDirector Grant or award A +2,799 – 16,757 Form 4
2026-06-23 Gipson Dennis GDirector Grant or award A +2,799 – 16,757 Form 4
2026-06-23 Amirthalingam BhavaniDirector Grant or award A +2,799 – 17,955 Form 4
2026-06-23 Hope James DDirector Grant or award A +2,799 – 9,738 Form 4
2026-06-23 Mazzarella Kathleen MDirector Grant or award A +2,799 – 16,757 Form 4
2026-06-23 Hardwick M SusanDirector Grant or award A +2,799 – 3,379 Form 4
2026-06-23 Newman MargaretDirector Grant or award A +2,799 – 16,757 Form 4
2026-06-23 Castellano James GDirector Grant or award A +2,799 – 7,437 Form 4
2026-06-22 Harper Carla DSenior VP, Human Resources Shares withheld for tax F −568 47.25 13,306 Form 4
2026-04-17 Bradbury Robyn LChief Financial Officer Conversion C +5,000 – 17,500 Form 4
2026-04-01 Hardwick M SusanDirector Grant or award A +580 – 580 Form 4
2026-03-12 Harper Carla DSenior VP, Human Resources Grant or award A +2,463 – 13,874 Form 4
2026-03-12 Huebert Michael G.President Grant or award A +10,500 – 25,337 Form 4
2026-03-12 Stephens John WeldonChief Accounting Officer Grant or award A +936 – 17,374 Form 4
2026-03-12 Cowles Bradford APresident Grant or award A +7,086 – 25,491 Form 4
2026-03-12 Witkowski Mark RDirector, Chief Executive Officer Grant or award A +18,372 – 51,119 Form 4
2026-03-12 Bradbury Robyn LChief Financial Officer Grant or award A +4,824 – 12,500 Form 4
2026-03-12 Giles Jeffrey DEVP, Corporate Development Grant or award A +3,021 – 9,681 Form 4
2026-03-11 Harper Carla DSenior VP, Human Resources Shares withheld for tax F −89 49.16 11,411 Form 4
2026-03-11 Huebert Michael G.President Shares withheld for tax F −447 49.16 14,837 Form 4
2026-03-11 Stephens John WeldonChief Accounting Officer Shares withheld for tax F −107 49.16 16,438 Form 4
2026-03-11 Cowles Bradford APresident Shares withheld for tax F −607 49.16 18,405 Form 4
2026-03-11 Witkowski Mark RDirector, Chief Executive Officer Shares withheld for tax F −1,685 49.16 32,747 Form 4
2026-03-11 Bradbury Robyn LChief Financial Officer Shares withheld for tax F −404 49.16 7,676 Form 4
2026-03-11 Whittenburg Mark GGeneral Counsel and Secretary Shares withheld for tax F −331 49.16 8,525 Form 4
2026-03-10 Bradbury Robyn LChief Financial Officer Shares withheld for tax F −205 49.38 8,080 Form 4
2026-03-10 LeClair Stephen ODirector, Executive Chair Shares withheld for tax F −3,081 49.38 66,136 Form 4
2026-03-10 Witkowski Mark RDirector, Chief Executive Officer Shares withheld for tax F −937 49.38 34,432 Form 4
2026-03-10 Cowles Bradford APresident Shares withheld for tax F −741 49.38 19,012 Form 4
2026-03-10 Stephens John WeldonChief Accounting Officer Shares withheld for tax F −198 49.38 16,545 Form 4
2026-03-10 Harper Carla DSenior VP, Human Resources Shares withheld for tax F −189 49.38 11,500 Form 4
2026-03-10 Whittenburg Mark GGeneral Counsel and Secretary Shares withheld for tax F −557 49.38 8,856 Form 4
2026-03-09 Bradbury Robyn LChief Financial Officer Shares withheld for tax F −270 49.96 8,285 Form 4
2026-03-09 LeClair Stephen ODirector, Executive Chair Shares withheld for tax F −1,519 49.96 69,217 Form 4
2026-03-09 Witkowski Mark RDirector, Chief Executive Officer Shares withheld for tax F −478 49.96 35,369 Form 4
2026-03-09 Cowles Bradford APresident Shares withheld for tax F −435 49.96 19,753 Form 4
2026-03-09 Huebert Michael G.President Shares withheld for tax F −350 49.96 15,284 Form 4
2026-03-09 Stephens John WeldonChief Accounting Officer Shares withheld for tax F −94 49.96 16,743 Form 4
2026-03-09 Harper Carla DSenior VP, Human Resources Shares withheld for tax F −77 49.96 11,689 Form 4
2026-03-09 Whittenburg Mark GGeneral Counsel and Secretary Shares withheld for tax F −278 49.96 9,413 Form 4
2026-01-26 Giles Jeffrey DEVP, Corporate Development Grant or award A +4,377 – 6,660 Form 4
2025-09-12 Stephens John WeldonChief Accounting Officer Option exercise M +12,717 20.81 16,837 Form 4
2025-09-03 Harper Carla DSenior VP, Human Resources Grant or award A +2,091 – 11,766 Form 4
2025-08-18 Witkowski Mark RDirector, Chief Executive Officer Conversion C +100,000 – 135,847 Form 4
2025-07-22 Bradbury Robyn LChief Financial Officer Conversion C +5,000 – 13,555 Form 4
2025-07-22 Huebert Michael G.President Shares withheld for tax F −1,337 65.03 15,634 Form 4
2025-07-18 Kimbrough Orvin TDirector Other J −5 – 3 Form 4
2025-07-18 Kimbrough Orvin TDirector Other J +5 – 13,963 Form 4
2025-07-18 Kimbrough Orvin TDirector Conversion C +23,957 – 37,920 Form 4
2025-07-18 Castellano James GDirector Conversion C +34,674 – 43,994 Form 4
2025-07-17 Witkowski Mark RDirector, Chief Executive Officer Conversion C +100,000 – 135,847 Form 4
2025-07-07 LeClair Stephen ODirector, Executive Chair Option exercise M +44,972 20.81 115,708 Form 4
2025-07-03 LeClair Stephen ODirector, Executive Chair Option exercise M +80,028 20.81 150,764 Form 4
2025-07-01 Bradbury Robyn LChief Financial Officer Other J −43 – 22 Form 4
2025-07-01 Bradbury Robyn LChief Financial Officer Other J +43 – 8,598 Form 4
2025-07-01 Bradbury Robyn LChief Financial Officer Conversion C +24,957 – 33,555 Form 4
2025-06-24 Mazzarella Kathleen MDirector Grant or award A +2,189 – 13,958 Form 4
2025-06-24 Hope James DDirector Grant or award A +2,189 – 4,967 Form 4
2025-06-24 Amirthalingam BhavaniDirector Grant or award A +2,189 – 15,156 Form 4
2025-06-24 Buck Robert MDirector Grant or award A +2,189 – 13,050 Form 4
2025-06-24 Kimbrough Orvin TDirector Grant or award A +2,189 – 13,958 Form 4
2025-06-24 Gipson Dennis GDirector Grant or award A +2,189 – 13,958 Form 4
2025-06-24 Newman MargaretDirector Grant or award A +2,189 – 13,958 Form 4
2025-06-24 Castellano James GDirector Grant or award A +2,189 – 4,638 Form 4
2025-06-09 Whittenburg Mark GGeneral Counsel and Secretary Conversion C +49,100 – 58,791 Form 4
2025-06-06 Whittenburg Mark GGeneral Counsel and Secretary Conversion C +900 – 10,591 Form 4
2025-06-03 Schneider Laura KChief Human Resources Officer Conversion C +45,695 – 58,568 Form 4
2025-05-28 Schaller John RExecutive Vice President Option exercise M +9,794 50.12 29,483 Form 4
2025-04-29 Stephens John WeldonChief Accounting Officer Conversion C +31,750 – 35,870 Form 4
2025-04-28 Stephens John WeldonChief Accounting Officer Conversion C +10,214 – 14,334 Form 4
2025-04-17 Castellano James GDirector Gift G −9,320 – 2,449 Form 4/A
2025-04-17 Castellano James GDirector Gift G +9,320 – 9,320 Form 4/A
2025-04-02 Stephens John WeldonChief Accounting Officer Conversion C +41,963 – 46,083 Form 4
2025-03-31 Witkowski Mark RDirector, Chief Executive Officer Grant or award A +10,092 – 35,847 Form 4
2025-03-31 Bradbury Robyn LChief Financial Officer Grant or award A +2,913 – 8,555 Form 4
2025-03-13 Huebert Michael G.President Grant or award A +4,494 – 16,971 Form 4
2025-03-13 Stephens John WeldonChief Accounting Officer Grant or award A +933 – 4,120 Form 4
2025-03-13 Schaller John RExecutive Vice President Grant or award A +4,215 – 19,689 Form 4
2025-03-13 Cowles Bradford APresident Grant or award A +6,162 – 20,188 Form 4
2025-03-13 Witkowski Mark RChief Financial Officer Grant or award A +7,296 – 25,755 Form 4
2025-03-13 Schneider Laura KChief Human Resources Officer Grant or award A +3,276 – 12,873 Form 4
2025-03-13 Giles Jeffrey DEVP, Corporate Department Grant or award A +2,988 – 12,083 Form 4
2025-03-13 Whittenburg Mark GGeneral Counsel and Secretary Grant or award A +3,411 – 9,691 Form 4
2025-03-11 LeClair Stephen ODirector, Chief Executive Officer Shares withheld for tax F −4,889 46.55 70,736 Form 4
2025-03-11 Whittenburg Mark GGeneral Counsel and Secretary Shares withheld for tax F −510 46.55 6,280 Form 4
2025-03-11 Witkowski Mark RChief Financial Officer Shares withheld for tax F −925 46.55 18,459 Form 4
2025-03-11 Stephens John WeldonChief Accounting Officer Shares withheld for tax F −200 46.55 3,187 Form 4
2025-03-11 Giles Jeffrey DEVP, Corporate Department Shares withheld for tax F −436 46.55 9,095 Form 4
2025-03-11 Schaller John RExecutive Vice President Shares withheld for tax F −978 46.55 15,474 Form 4
2025-03-11 Schaller John RExecutive Vice President Option exercise M +19,292 20.81 34,766 Form 4
2025-03-11 Cowles Bradford APresident Shares withheld for tax F −724 46.55 14,026 Form 4
2025-03-11 Schneider Laura KChief Human Resources Officer Shares withheld for tax F −434 46.55 9,597 Form 4
2025-03-10 Cowles Bradford APresident Shares withheld for tax F −822 46.69 14,750 Form 4
2025-03-10 Schneider Laura KChief Human Resources Officer Shares withheld for tax F −428 46.69 10,031 Form 4
2025-03-10 Stephens John WeldonChief Accounting Officer Shares withheld for tax F −198 46.69 3,387 Form 4
2025-03-10 Schaller John RExecutive Vice President Shares withheld for tax F −984 46.69 16,452 Form 4
2025-03-10 Schaller John RExecutive Vice President Option exercise M +21,868 22.11 38,320 Form 4
2025-03-10 Witkowski Mark RChief Financial Officer Shares withheld for tax F −996 46.69 19,384 Form 4
2025-03-10 Whittenburg Mark GGeneral Counsel and Secretary Shares withheld for tax F −599 46.69 6,790 Form 4
2025-03-10 Giles Jeffrey DEVP, Corporate Department Shares withheld for tax F −467 46.69 9,531 Form 4
2025-03-10 LeClair Stephen ODirector, Chief Executive Officer Shares withheld for tax F −3,671 46.69 75,625 Form 4
2025-03-07 Cowles Bradford APresident Shares withheld for tax F −438 47.87 15,572 Form 4
2025-03-07 Schneider Laura KChief Human Resources Officer Shares withheld for tax F −205 47.87 10,459 Form 4
2025-03-07 Stephens John WeldonChief Accounting Officer Shares withheld for tax F −94 47.87 3,585 Form 4
2025-03-07 Huebert Michael G.President Shares withheld for tax F −359 47.87 12,477 Form 4
2025-03-07 Schaller John RExecutive Vice President Shares withheld for tax F −462 47.87 17,436 Form 4
2025-03-07 Witkowski Mark RChief Financial Officer Shares withheld for tax F −536 47.87 20,380 Form 4
2025-03-07 Whittenburg Mark GGeneral Counsel and Secretary Shares withheld for tax F −278 47.87 7,389 Form 4
2025-03-07 Giles Jeffrey DEVP, Corporate Department Shares withheld for tax F −235 47.87 9,998 Form 4
2025-03-07 LeClair Stephen ODirector, Chief Executive Officer Shares withheld for tax F −1,841 47.87 79,296 Form 4
2025-02-10 Cowles Bradford APresident Conversion C +25,000 – 41,010 Form 4
2025-01-16 Whittenburg Mark GGeneral Counsel and Secretary Conversion C +48,026 – 55,693 Form 4
2025-01-15 Whittenburg Mark GGeneral Counsel and Secretary Conversion C +1,974 – 9,641 Form 4
2025-01-14 Cowles Bradford APresident Conversion C +12,500 – 28,510 Form 4
2025-01-10 Cowles Bradford APresident Conversion C +12,500 – 28,510 Form 4
2025-01-10 Schaller John RExecutive Vice President Option exercise M +38,584 20.81 56,482 Form 4
2025-01-10 Schaller John RExecutive Vice President Option exercise M +21,868 22.11 39,766 Form 4
2025-01-10 Whittenburg Mark GGeneral Counsel and Secretary Conversion C +46,452 – 57,667 Form 4
2024-12-03 LeClair Stephen ODirector, Chief Executive Officer Conversion C +200,000 – 292,349 Form 4
2024-12-03 Newman MargaretDirector Other J −32 – 0 Form 4
2024-12-03 Newman MargaretDirector Other J +32 – 11,801 Form 4
2024-12-03 Newman MargaretDirector Conversion C +14,968 – 26,769 Form 4
2024-12-03 Cowles Bradford APresident Conversion C +50,000 – 68,423 Form 4
2024-12-03 Giles Jeffrey DEVP, Corporate Department Other J −2 – 0 Form 4
2024-12-03 Giles Jeffrey DEVP, Corporate Department Other J +2 – 14,356 Form 4
2024-12-03 Giles Jeffrey DEVP, Corporate Department Conversion C +22,259 – 36,615 Form 4

How to read it

Buy, sale
Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
Plan
A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
Holds after
The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
Value
Shares times the price the form reports, which is often an average over several fills on the day.

Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.

Core & Main's scores and multiples ›