Insider Transactions Reported by 24 Insiders of Core & Main, Inc.

Symbol
CNM on NYSE
Location
St. Louis, MO

Insiders trading volume in the past year

Core & Main, Inc. executives and other stock owners filed with the SEC include:

Name Relationship Holdings Value Past Year Net Change Change % Report Date
Mark G. Whittenburg General Counsel and Secretary $16,872,241 -$3,001,255 -15% 11 Mar 2026
Dennis G. Gipson Director $12,399,910 24 Jun 2025
John W. Stephens Chief Accounting Officer $6,693,803 -$4,343,831 -39% 11 Mar 2026
Stephen O LeClair Executive Chair, Director $3,868,956 -$7,767,601 -67% 09 Mar 2026
Mark R. Witkowski Chief Executive Officer, Director $2,990,461 -$12,534,598 -81% 11 Mar 2026
Margaret M. Newman Director $2,964,563 24 Jun 2025
Bradford A. Cowles President $1,491,223 11 Mar 2026
Michael G. Huebert President $1,482,214 11 Mar 2026
John R. Schaller Executive Vice President $1,082,895 -$538,670 -33% 28 May 2025
Orvin T. Kimbrough Director $862,344 -$1,480,094 -63% 18 Jul 2025
Carla D. Harper Senior VP, Human Resources $811,629 11 Mar 2026
Bhavani Amirthalingam Director $806,753 24 Jun 2025
Kathleen M. Mazzarella Director $747,348 24 Jun 2025
Robyn L. Bradbury Chief Financial Officer $732,537 -$1,834,834 -71% 11 Mar 2026
Laura K. Schneider Chief Human Resources Officer $724,092 -$2,570,293 -78% 03 Jun 2025
Robert M. Buck Director $694,651 24 Jun 2025
Jeffrey D. Giles EVP, Corporate Development $566,338 12 Mar 2026
James G. Castellano Director $279,903 -$2,726,783 -91% 18 Jul 2025
James D. Hope Director $264,393 24 Jun 2025
CD&R Investment Associates X, Ltd. 10%+ Owner 25 Jan 2024
Ian A. Rorick Director 23 Jul 2021
Nathan K. Sleeper Director 10 Jan 2024
James G. Berges Director 23 Jul 2021
Jonathan L. Zrebiec Director 23 Jul 2021

Recent Insider Transactions by Companies or Individuals for Core & Main, Inc.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % Value $ * Price $ Shares Shares Owned Date Ownership
Jeffrey D. Giles CNM Class A Common Stock Award 45.4% 3,021 9,681 12 Mar 2026 Direct
Jeffrey D. Giles CNM Options (Rights to Buy) Award 21,585 21,585 12 Mar 2026 Direct
Robyn L. Bradbury CNM Class A Common Stock Award 62.8% 4,824 12,500 12 Mar 2026 Direct
Robyn L. Bradbury CNM Options (Rights to Buy) Award 34,488 34,488 12 Mar 2026 Direct
Mark R. Witkowski CNM Class A Common Stock Award 56.1% 18,372 51,119 12 Mar 2026 Direct
Mark R. Witkowski CNM Options (Rights to Buy) Award 131,382 131,382 12 Mar 2026 Direct
Bradford A. Cowles CNM Class A Common Stock Award 38.5% 7,086 25,491 12 Mar 2026 Direct
Bradford A. Cowles CNM Options (Rights to Buy) Award 50,676 50,676 12 Mar 2026 Direct
John W. Stephens CNM Class A Common Stock Award 5.69% 936 17,374 12 Mar 2026 Direct
John W. Stephens CNM Options (Rights to Buy) Award 6,684 6,684 12 Mar 2026 Direct
Michael G. Huebert CNM Class A Common Stock Award 70.8% 10,500 25,337 12 Mar 2026 Direct
Michael G. Huebert CNM Options (Rights to Buy) Award 37,539 37,539 12 Mar 2026 Direct
Carla D. Harper CNM Class A Common Stock Award 21.6% 2,463 13,874 12 Mar 2026 Direct
Carla D. Harper CNM Options (Rights to Buy) Award 17,598 17,598 12 Mar 2026 Direct
Mark G. Whittenburg CNM Class A Common Stock Tax liability -3.74% -331 8,525 11 Mar 2026 Direct
Robyn L. Bradbury CNM Class A Common Stock Tax liability -5% -404 7,676 11 Mar 2026 Direct
Mark R. Witkowski CNM Class A Common Stock Tax liability -4.89% -1,685 32,747 11 Mar 2026 Direct
Bradford A. Cowles CNM Class A Common Stock Tax liability -3.19% -607 18,405 11 Mar 2026 Direct
John W. Stephens CNM Class A Common Stock Tax liability -0.65% -107 16,438 11 Mar 2026 Direct
Michael G. Huebert CNM Class A Common Stock Tax liability -2.92% -447 14,837 11 Mar 2026 Direct
Carla D. Harper CNM Class A Common Stock Tax liability -0.77% -89 11,411 11 Mar 2026 Direct
Mark G. Whittenburg CNM Class A Common Stock Tax liability -5.92% -557 8,856 10 Mar 2026 Direct
Carla D. Harper CNM Class A Common Stock Tax liability -1.62% -189 11,500 10 Mar 2026 Direct
John W. Stephens CNM Class A Common Stock Tax liability -1.18% -198 16,545 10 Mar 2026 Direct
Bradford A. Cowles CNM Class A Common Stock Tax liability -3.75% -741 19,012 10 Mar 2026 Direct
Mark R. Witkowski CNM Class A Common Stock Tax liability -2.65% -937 34,432 10 Mar 2026 Direct
Stephen O LeClair CNM Class A Common Stock Tax liability -4.45% -3,081 66,136 10 Mar 2026 Direct
Robyn L. Bradbury CNM Class A Common Stock Tax liability -2.47% -205 8,080 10 Mar 2026 Direct
Mark G. Whittenburg CNM Class A Common Stock Tax liability -2.87% -278 9,413 09 Mar 2026 Direct
Carla D. Harper CNM Class A Common Stock Tax liability -0.65% -77 11,689 09 Mar 2026 Direct
John W. Stephens CNM Class A Common Stock Tax liability -0.56% -94 16,743 09 Mar 2026 Direct
Michael G. Huebert CNM Class A Common Stock Tax liability -2.24% -350 15,284 09 Mar 2026 Direct
Bradford A. Cowles CNM Class A Common Stock Tax liability -2.15% -435 19,753 09 Mar 2026 Direct
Mark R. Witkowski CNM Class A Common Stock Tax liability -1.33% -478 35,369 09 Mar 2026 Direct
Stephen O LeClair CNM Class A Common Stock Tax liability -2.15% -1,519 69,217 09 Mar 2026 Direct
Robyn L. Bradbury CNM Class A Common Stock Tax liability -3.16% -270 8,285 09 Mar 2026 Direct
Jeffrey D. Giles CNM Class A Common Stock Award 191.7% 4,377 6,660 26 Jan 2026 Direct
Jeffrey D. Giles CNM Options (Rights to Buy) Award 10,617 10,617 26 Jan 2026 Direct
Mark G. Whittenburg CNM Class B Common Stock and Limited Partnership Interests Gift -10.1% -25,500 227,312 31 Dec 2025 By LLC
John W. Stephens CNM Class A Common Stock Options Exercise 308.7% 12,717 16,837 12 Sep 2025 Direct
John W. Stephens CNM Options (Rights to Buy) Options Exercise -100% -12,717 0 12 Sep 2025 Direct
Carla D. Harper CNM Class A Common Stock Award 21.6% 2,091 11,766 03 Sep 2025 Direct
Mark R. Witkowski CNM Class A Common Stock Sale -73.6% $6,408,210 $64.08 -100,000 35,847 18 Aug 2025 Direct
Mark R. Witkowski CNM Class A Common Stock Conversion of derivative security 279% 100,000 135,847 18 Aug 2025 Direct
Mark R. Witkowski CNM Class B Common Stock and Limited Partnership Interests Conversion of derivative security -100% -100,000 0 18 Aug 2025 Direct
Mark R. Witkowski CNM Class B Common Stock and Limited Partnership Interests Other 100,000 100,000 18 Aug 2025 Direct
Mark R. Witkowski CNM Class B Common Stock and Limited Partnership Interests Other -14% -100,000 616,250 18 Aug 2025 By LLC
Michael G. Huebert CNM Class A Common Stock Tax liability -7.88% -1,337 15,634 22 Jul 2025 Direct
Robyn L. Bradbury CNM Class A Common Stock Sale -36.9% $322,550 $64.51 -5,000 8,555 22 Jul 2025 Direct
Robyn L. Bradbury CNM Class A Common Stock Conversion of derivative security 58.4% 5,000 13,555 22 Jul 2025 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.