Core & Main Inc. (CNM) Insider Trading

Last 12 months

Insiders bought $195k and sold $263k on the open market.

All of the selling was scheduled in advance under 10b5-1 plans.

Net open-market

−$68k

2 buys · 1 sale

Under a 10b5-1 plan

100%

of the value sold

Insiders who bought / sold

1 / 1

executives and directors

Last open-market buy

Jul 2026

Jul 6, 2026

Get an email when CNM's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Jul 6	James D Hope Director	Bought	2,067	$46.01	$95k	21%	Form 4
Apr 17	Robyn L Bradbury Chief Financial Officer	Sold10b5-1 plan 2 parts	5,000	$52.54 average	$263k	29%	Form 4
Apr 7	James D Hope Director	Bought	1,972	$50.70	$100k	40%	Form 4
Aug 18, 2025	Mark R Witkowski Chief Executive Officer	Sold10b5-1 plan	100,000	$64.08	$6.41M	74%	Form 4
Jul 22, 2025	Robyn L Bradbury Chief Financial Officer	Sold10b5-1 plan	5,000	$64.51	$323k	37%	Form 4
Jul 18, 2025	James G Castellano Director	Sold10b5-1 plan	43,994	$61.98	$2.73M	90%	Form 4
Jul 18, 2025	Orvin T Kimbrough Director	Sold10b5-1 plan	23,962	$61.77	$1.48M	63%	Form 4
Jul 17, 2025	Mark R Witkowski Chief Executive Officer	Sold10b5-1 plan 2 parts	100,000	$61.26 average	$6.13M	74%	Form 4
Jul 3, 2025 – Jul 7, 2025	Stephen O Leclair Executive Chair	SoldNo plan 2 parts	125,000	$62.14 average	$7.77M	64%	Form 4
Jul 1, 2025	Robyn L Bradbury Chief Financial Officer	Sold10b5-1 plan 3 parts	25,000	$60.49 average	$1.51M	74%	Form 4
Jun 6, 2025 – Jun 9, 2025	Mark G Whittenburg General Counsel and Secretary	Sold10b5-1 plan 2 parts	50,000	$60.03 average	$3M	84%	Form 4
Jun 3, 2025	Laura K Schneider Chief Human Resources Officer	Sold10b5-1 plan	45,695	$56.25	$2.57M	78%	Form 4
May 28, 2025	John R Schaller Executive Vice President	Sold10b5-1 plan	9,794	$55.00	$539k	33%	Form 4
Apr 28, 2025 – Apr 29, 2025	John Weldon Stephens Chief Accounting Officer	Sold10b5-1 plan 2 parts	41,964	$53.03 average	$2.23M	91%	Form 4
Apr 2, 2025	John Weldon Stephens Chief Accounting Officer	Sold10b5-1 plan	41,963	$50.48	$2.12M	91%	Form 4
Mar 11, 2025	John R Schaller Executive Vice President	Sold10b5-1 plan	19,292	$45.00	$868k	55%	Form 4
Mar 10, 2025	John R Schaller Executive Vice President	Sold10b5-1 plan	21,868	$46.82	$1.02M	57%	Form 4
Feb 10, 2025	Bradford A Cowles President	Sold10b5-1 plan	25,000	$54.48	$1.36M	61%	Form 4
Jan 15, 2025 – Jan 16, 2025	Mark G Whittenburg General Counsel and Secretary	Sold10b5-1 plan 2 parts	50,000	$55.14 average	$2.76M	87%	Form 4
Jan 10, 2025 – Jan 14, 2025	Bradford A Cowles President	Sold10b5-1 plan 2 parts	25,000	$52.29 average	$1.31M	61%	Form 4
Jan 10, 2025	Mark G Whittenburg General Counsel and Secretary	Sold10b5-1 plan	50,000	$50.49	$2.52M	87%	Form 4
Jan 10, 2025	John R Schaller Executive Vice President	Sold10b5-1 plan 3 parts	60,452	$50.57 average	$3.06M	77%	Form 4
Dec 3, 2024	Jeffrey D Giles EVP, Corporate Department	Sold10b5-1 plan	25,000	$54.71	$1.37M	68%	Form 4
Dec 3, 2024	Bradford A Cowles President	Sold10b5-1 plan	50,000	$55.07	$2.75M	73%	Form 4
Dec 3, 2024	Margaret Newman Director	Sold10b5-1 plan	15,000	$55.25	$829k	56%	Form 4
Dec 3, 2024	Stephen O Leclair Chief Executive Officer	Sold10b5-1 plan	200,000	$54.88	$11M	68%	Form 4

Jul 6
James D Hope
Director · bought 2,067 at $46.01
$95k
21% of stake
Apr 1710b5-1 plan
Robyn L Bradbury
Chief Financial Officer · sold 5,000 at avg $52.54
$263k
29% of stake
Apr 7
James D Hope
Director · bought 1,972 at $50.70
$100k
40% of stake
Aug 18, 202510b5-1 plan
Mark R Witkowski
Chief Executive Officer · sold 100,000 at $64.08
$6.41M
74% of stake
Jul 22, 202510b5-1 plan
Robyn L Bradbury
Chief Financial Officer · sold 5,000 at $64.51
$323k
37% of stake
Jul 18, 202510b5-1 plan
James G Castellano
Director · sold 43,994 at $61.98
$2.73M
90% of stake
Jul 18, 202510b5-1 plan
Orvin T Kimbrough
Director · sold 23,962 at $61.77
$1.48M
63% of stake
Jul 17, 202510b5-1 plan
Mark R Witkowski
Chief Executive Officer · sold 100,000 at avg $61.26
$6.13M
74% of stake
Jul 3, 2025 – Jul 7, 2025No plan
Stephen O Leclair
Executive Chair · sold 125,000 at avg $62.14
$7.77M
64% of stake
Jul 1, 202510b5-1 plan
Robyn L Bradbury
Chief Financial Officer · sold 25,000 at avg $60.49
$1.51M
74% of stake
Jun 6, 2025 – Jun 9, 202510b5-1 plan
Mark G Whittenburg
General Counsel and Secretary · sold 50,000 at avg $60.03
$3M
84% of stake
Jun 3, 202510b5-1 plan
Laura K Schneider
Chief Human Resources Officer · sold 45,695 at $56.25
$2.57M
78% of stake
May 28, 202510b5-1 plan
John R Schaller
Executive Vice President · sold 9,794 at $55.00
$539k
33% of stake
Apr 28, 2025 – Apr 29, 202510b5-1 plan
John Weldon Stephens
Chief Accounting Officer · sold 41,964 at avg $53.03
$2.23M
91% of stake
Apr 2, 202510b5-1 plan
John Weldon Stephens
Chief Accounting Officer · sold 41,963 at $50.48
$2.12M
91% of stake
Mar 11, 202510b5-1 plan
John R Schaller
Executive Vice President · sold 19,292 at $45.00
$868k
55% of stake
Mar 10, 202510b5-1 plan
John R Schaller
Executive Vice President · sold 21,868 at $46.82
$1.02M
57% of stake
Feb 10, 202510b5-1 plan
Bradford A Cowles
President · sold 25,000 at $54.48
$1.36M
61% of stake
Jan 15, 2025 – Jan 16, 202510b5-1 plan
Mark G Whittenburg
General Counsel and Secretary · sold 50,000 at avg $55.14
$2.76M
87% of stake
Jan 10, 2025 – Jan 14, 202510b5-1 plan
Bradford A Cowles
President · sold 25,000 at avg $52.29
$1.31M
61% of stake
Jan 10, 202510b5-1 plan
Mark G Whittenburg
General Counsel and Secretary · sold 50,000 at $50.49
$2.52M
87% of stake
Jan 10, 202510b5-1 plan
John R Schaller
Executive Vice President · sold 60,452 at avg $50.57
$3.06M
77% of stake
Dec 3, 202410b5-1 plan
Jeffrey D Giles
EVP, Corporate Department · sold 25,000 at $54.71
$1.37M
68% of stake
Dec 3, 202410b5-1 plan
Bradford A Cowles
President · sold 50,000 at $55.07
$2.75M
73% of stake
Dec 3, 202410b5-1 plan
Margaret Newman
Director · sold 15,000 at $55.25
$829k
56% of stake
Dec 3, 202410b5-1 plan
Stephen O Leclair
Chief Executive Officer · sold 200,000 at $54.88
$11M
68% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch CNM, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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