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United States Machinery, Equipment & Components

Core & Main Inc (CNM)

Track

Over the last 90 days, Core & Main Inc. has seen a net sale of insider shares totaling $48.17 million, with a single insider purchase of $0.1 million. Notable large proposed sales were made by former officers and directors, including Stephen O. LeClair and Mark G. Whittenburg. The company's stock has experienced a 0.9% increase in the last 90 days.
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Ticker: CNM Exchange: NYS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Whittenburg Mark G
Former Officer
1 sale — total 931,293 USD
Proposed sale 29 May 2026
Value US$2,429,664.88 | Price 280.80 | Shares 26,782
Proposed sale 27 May 2026
Value US$2,858,730.44 | Price 169.11 | Shares 71,450
Proposed sale 20 Apr 2026
Value US$20,316,000.00 | Price 50.79 | Shares 400,000
Planned sale 17 Apr 2026
Value US$177,178.22 | Price 52.84 | Shares 3,353
Planned sale 17 Apr 2026
Value US$85,545.84 | Price 51.94 | Shares 1,647
Proposed sale 17 Apr 2026
Value US$1,818,950.00 | Price 51.97 | Shares 35,000
Proposed sale 16 Apr 2026
Value US$6,951,674.68 | Price 52.34 | Shares 132,808
Proposed sale 15 Apr 2026
Value US$16,805,882.57 | Price 53.29 | Shares 315,378
Buy 7 Apr 2026
Value US$99,970.54 | Price 50.70 | Shares 1,972
Proposed sale 13 Jan 2026
Value US$1,112,402.52 | Price 56.79 | Shares 19,588
Proposed sale 5 Jan 2026
Value US$2,890,030.00 | Price 55.00 | Shares 52,546
Planned sale 18 Aug 2025
Value US$6,408,210.00 | Price 64.08 | Shares 100,000
Planned sale 22 Jul 2025
Value US$322,550.50 | Price 64.51 | Shares 5,000
Planned sale 18 Jul 2025
Value US$2,726,783.32 | Price 61.98 | Shares 43,994
Planned sale 18 Jul 2025
Value US$1,480,094.40 | Price 61.77 | Shares 23,962
Proposed sale 18 Jul 2025
Value US$1,482,049.70 | Price 61.85 | Shares 23,962
Proposed sale 18 Jul 2025
Value US$2,721,028.90 | Price 61.85 | Shares 43,994
Planned sale 17 Jul 2025
Value US$1,705,234.94 | Price 61.63 | Shares 27,669
Planned sale 17 Jul 2025
Value US$4,421,152.81 | Price 61.12 | Shares 72,331
Proposed sale 17 Jul 2025
Value US$6,049,000.00 | Price 60.49 | Shares 100,000
Proposed sale 10 Jul 2025
Value US$7,309,145.89 | Price 62.51 | Shares 116,931
Sale 7 Jul 2025
Value US$2,784,409.90 | Price 61.91 | Shares 44,972
Proposed sale 7 Jul 2025
Value US$2,784,411.63 | Price 61.91 | Shares 44,972
Sale 3 Jul 2025
Value US$4,983,191.51 | Price 62.27 | Shares 80,028
Proposed sale 3 Jul 2025
Value US$4,983,126.48 | Price 62.27 | Shares 80,028
Planned sale 1 Jul 2025
Value US$19,643.09 | Price 61.58 | Shares 319
Planned sale 1 Jul 2025
Value US$691,317.02 | Price 61.08 | Shares 11,318
Planned sale 1 Jul 2025
Value US$801,322.99 | Price 59.97 | Shares 13,363
Proposed sale 1 Jul 2025
Value US$1,810,500.00 | Price 60.35 | Shares 30,000
Proposed sale 23 Jun 2025
Value US$3,377,426.97 | Price 58.29 | Shares 57,943
Planned sale 9 Jun 2025
Value US$2,947,232.41 | Price 60.03 | Shares 49,100
Planned sale 6 Jun 2025
Value US$54,022.68 | Price 60.03 | Shares 900
Proposed sale 6 Jun 2025
Value US$2,984,000.00 | Price 59.68 | Shares 50,000
Planned sale 3 Jun 2025
Value US$2,570,293.49 | Price 56.25 | Shares 45,695
Proposed sale 3 Jun 2025
Value US$10,477,510.00 | Price 53.54 | Shares 195,695
Planned sale 28 May 2025
Value US$538,670.00 | Price 55.00 | Shares 9,794
Proposed sale 28 May 2025
Value US$538,670.00 | Price 55.00 | Shares 9,794
Planned sale 29 Apr 2025
Value US$1,683,797.75 | Price 53.03 | Shares 31,750
Planned sale 28 Apr 2025
Value US$541,572.84 | Price 53.02 | Shares 10,214
Proposed sale 25 Apr 2025
Value US$2,090,400.00 | Price 52.26 | Shares 40,000
Planned sale 2 Apr 2025
Value US$2,118,460.09 | Price 50.48 | Shares 41,963
Proposed sale 2 Apr 2025
Value US$4,144,315.26 | Price 49.38 | Shares 83,927
Planned sale 11 Mar 2025
Value US$868,140.00 | Price 45.00 | Shares 19,292
Proposed sale 11 Mar 2025
Value US$868,140.00 | Price 45.00 | Shares 19,292
Planned sale 10 Mar 2025
Value US$1,023,859.76 | Price 46.82 | Shares 21,868
Proposed sale 10 Mar 2025
Value US$1,023,859.76 | Price 46.82 | Shares 21,868
Planned sale 10 Feb 2025
Value US$1,362,082.50 | Price 54.48 | Shares 25,000
Planned sale 16 Jan 2025
Value US$2,647,658.97 | Price 55.13 | Shares 48,026
Planned sale 15 Jan 2025
Value US$109,134.17 | Price 55.29 | Shares 1,974
Planned sale 14 Jan 2025
Value US$675,895.00 | Price 54.07 | Shares 12,500
Planned sale 10 Jan 2025
Value US$631,190.00 | Price 50.50 | Shares 12,500
Planned sale 10 Jan 2025
Value US$1,105,611.09 | Price 50.56 | Shares 21,868
Planned sale 10 Jan 2025
Value US$30,847.02 | Price 51.41 | Shares 600
Planned sale 10 Jan 2025
Value US$1,920,603.98 | Price 50.56 | Shares 37,984
Proposed sale 10 Jan 2025
Value US$3,057,061.16 | Price 50.57 | Shares 60,452
Planned sale 10 Jan 2025
Value US$2,524,500.00 | Price 50.49 | Shares 50,000
Proposed sale 10 Jan 2025
Value US$2,544,000.00 | Price 50.88 | Shares 50,000
Proposed sale 10 Jan 2025
Value US$7,632,000.00 | Price 50.88 | Shares 150,000
Planned sale 3 Dec 2024
Value US$10,976,180.00 | Price 54.88 | Shares 200,000
Planned sale 3 Dec 2024
Value US$2,753,280.00 | Price 55.07 | Shares 50,000
Planned sale 3 Dec 2024
Value US$828,687.00 | Price 55.25 | Shares 15,000
Planned sale 3 Dec 2024
Value US$1,367,865.00 | Price 54.71 | Shares 25,000
Proposed sale 3 Dec 2024
Value US$2,922,101.00 | Price 53.99 | Shares 54,123
Proposed sale 3 Dec 2024
Value US$10,798,000.00 | Price 53.99 | Shares 200,000
Proposed sale 3 Dec 2024
Value US$1,349,750.00 | Price 53.99 | Shares 25,000
Proposed sale 3 Dec 2024
Value US$5,399,000.00 | Price 53.99 | Shares 100,000
Planned sale 16 Jul 2024
Value US$1,327,057.50 | Price 53.08 | Shares 25,000
Proposed sale 16 Jul 2024
Value US$1,300,750.00 | Price 52.03 | Shares 25,000
Planned sale 15 Jul 2024
Value US$652,786.25 | Price 52.22 | Shares 12,500
Planned sale 11 Jul 2024
Value US$623,569.41 | Price 50.70 | Shares 12,300
Planned sale 10 Jul 2024
Value US$10,002.00 | Price 50.01 | Shares 200
Proposed sale 10 Jul 2024
Value US$1,234,500.00 | Price 49.38 | Shares 25,000
Planned sale 8 May 2024
Value US$2,975,005.00 | Price 59.50 | Shares 50,000
Planned sale 8 May 2024
Value US$2,975,005.00 | Price 59.50 | Shares 50,000
Planned sale 23 Apr 2024
Value US$524,128.03 | Price 55.19 | Shares 9,497
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-05-29 2026-05-29 PrS Proposed sale
Whittenburg Mark G

Former Officer

Officer
26,782
280.80
US$2,429,665 		26,782 280.80 US$2,429,665
2026-05-27 2026-05-27 PrS Proposed sale
Whittenburg Mark G

Former Officer

Officer
71,450
169.11
US$2,858,730 		71,450 169.11 US$2,858,730
2026-04-20 2026-04-20 PrS Proposed sale
2.7
Stephen O. LeClair

Former Director

Non-Executive Director
42,860
110.49
US$2,179,872 		42,860 110.49 US$2,179,872
2026-04-21 2026-04-17 PlS Planned sale
Bradbury Robyn L

Chief Financial Officer

Officer
3,353 -21.2%
52.84
US$177,178 		3,353 -21.2% 52.84 US$177,178
2026-04-21 2026-04-17 PlS Planned sale
Bradbury Robyn L

Chief Financial Officer

Officer
1,647 -9.4%
51.94
US$85,546 		1,647 -9.4% 51.94 US$85,546
2026-04-17 2026-04-17 PrS Proposed sale
Robyn L. Bradbury

Officer

Officer
35,000
51.97
US$1,818,950 		35,000 51.97 US$1,818,950
2026-04-16 2026-04-16 PrS Proposed sale
2.7
LeClair Stephen O

Former Director

Non-Executive Director
132,808
52.34
US$6,951,675 		132,808 52.34 US$6,951,675
2026-04-15 2026-04-15 PrS Proposed sale
2.7
LeClair Stephen O

Former Director

Non-Executive Director
315,378
53.29
US$16,805,883 		315,378 53.29 US$16,805,883
2026-04-09 2026-04-07 B Purchase
1.1
Hope James D
Non-Executive Director
1,972 +39.7%
50.70
US$99,971 		1,972 +39.7% 50.70 US$99,971
2026-01-13 2026-01-13 PrS Proposed sale
Schaller John R

Former Officer

Officer
19,588
56.79
US$1,112,403 		19,588 56.79 US$1,112,403
2026-01-05 2026-01-05 PrS Proposed sale
Schaller John R

Former Officer

Officer
52,546
55.00
US$2,890,030 		52,546 55.00 US$2,890,030
2025-08-20 2025-08-18 PlS Planned sale
Witkowski Mark R

Chief Executive Officer

Executive Director
100,000 -73.6%
64.08
US$6,408,210 		100,000 -73.6% 64.08 US$6,408,210
2025-07-23 2025-07-22 PlS Planned sale
Bradbury Robyn L

Chief Financial Officer

Officer
5,000 -36.9%
64.51
US$322,550 		5,000 -36.9% 64.51 US$322,550
2025-07-21 2025-07-18 PlS Planned sale
Castellano James G
Non-Executive Director
43,994 -100.0%
61.98
US$2,726,783 		43,994 -100.0% 61.98 US$2,726,783
2025-07-21 2025-07-18 PlS Planned sale
Kimbrough Orvin T
Non-Executive Director
23,962 -63.2%
61.77
US$1,480,094 		23,962 -63.2% 61.77 US$1,480,094
2025-07-18 2025-07-18 PrS Proposed sale
Orvin T. Kimbrough

Director

Non-Executive Director
23,962
61.85
US$1,482,050 		23,962 61.85 US$1,482,050
2025-07-18 2025-07-18 PrS Proposed sale
James G. Castellano

Director

Non-Executive Director
43,994
61.85
US$2,721,029 		43,994 61.85 US$2,721,029
2025-07-21 2025-07-17 PlS Planned sale
Witkowski Mark R

Chief Executive Officer

Executive Director
27,669 -43.6%
61.63
US$1,705,235 		27,669 -43.6% 61.63 US$1,705,235
2025-07-21 2025-07-17 PlS Planned sale
Witkowski Mark R

Chief Executive Officer

Executive Director
72,331 -53.2%
61.12
US$4,421,153 		72,331 -53.2% 61.12 US$4,421,153
2025-07-17 2025-07-17 PrS Proposed sale
Mark R. Witkowski

Officer

Officer
100,000
60.49
US$6,049,000 		100,000 60.49 US$6,049,000
2025-07-10 2025-07-10 PrS Proposed sale
Schneider Laura K

Former Officer

Officer
116,931
62.51
US$7,309,146 		116,931 62.51 US$7,309,146
2025-07-08 2025-07-07 S Sale
2.7
LeClair Stephen O

Executive Chair

Executive Director
44,972 -38.9%
61.91
US$2,784,410 		44,972 -38.9% 61.91 US$2,784,410
2025-07-07 2025-07-07 PrS Proposed sale
2.7
LeClair Stephen O

Officer; Director

Executive Director
44,972
61.91
US$2,784,412 		44,972 61.91 US$2,784,412
2025-07-08 2025-07-03 S Sale
2.7
LeClair Stephen O

Executive Chair

Executive Director
80,028 -53.1%
62.27
US$4,983,192 		80,028 -53.1% 62.27 US$4,983,192
2025-07-03 2025-07-03 PrS Proposed sale
2.7
LeClair Stephen O

Officer; Director

Executive Director
80,028
62.27
US$4,983,126 		80,028 62.27 US$4,983,126
2025-07-03 2025-07-01 PlS Planned sale
Bradbury Robyn L

Chief Financial Officer

Officer
319 -3.6%
61.58
US$19,643 		319 -3.6% 61.58 US$19,643
2025-07-03 2025-07-01 PlS Planned sale
Bradbury Robyn L

Chief Financial Officer

Officer
11,318 -56.1%
61.08
US$691,317 		11,318 -56.1% 61.08 US$691,317
2025-07-03 2025-07-01 PlS Planned sale
Bradbury Robyn L

Chief Financial Officer

Officer
13,363 -39.8%
59.97
US$801,323 		13,363 -39.8% 59.97 US$801,323
2025-07-01 2025-07-01 PrS Proposed sale
Robyn L. Bradbury

Officer

Officer
30,000
60.35
US$1,810,500 		30,000 60.35 US$1,810,500
2025-06-23 2025-06-23 PrS Proposed sale
Giles Jeffrey D

Former Officer

Officer
57,943
58.29
US$3,377,427 		57,943 58.29 US$3,377,427
2025-06-10 2025-06-09 PlS Planned sale
Whittenburg Mark G

General Counsel and Secretary

Officer
49,100 -83.5%
60.03
US$2,947,232 		49,100 -83.5% 60.03 US$2,947,232
2025-06-10 2025-06-06 PlS Planned sale
Whittenburg Mark G

General Counsel and Secretary

Officer
900 -8.5%
60.03
US$54,023 		900 -8.5% 60.03 US$54,023
2025-06-06 2025-06-06 PrS Proposed sale
Mark G. Whittenburg

Officer

Officer
50,000
59.68
US$2,984,000 		50,000 59.68 US$2,984,000
2025-06-05 2025-06-03 PlS Planned sale
Schneider Laura K

Chief Human Resources Officer

Officer
45,695 -78.0%
56.25
US$2,570,293 		45,695 -78.0% 56.25 US$2,570,293
2025-06-03 2025-06-03 PrS Proposed sale
Laura K. Schneider

Officer

Officer
195,695
53.54
US$10,477,510 		195,695 53.54 US$10,477,510
2025-05-30 2025-05-28 PlS Planned sale
Schaller John R

Executive Vice President

Officer
9,794 -33.2%
55.00
US$538,670 		9,794 -33.2% 55.00 US$538,670
2025-05-28 2025-05-28 PrS Proposed sale
Schaller John R

Officer

Officer
9,794
55.00
US$538,670 		9,794 55.00 US$538,670
2025-04-30 2025-04-29 PlS Planned sale
Stephens John Weldon

Chief Accounting Officer

Officer
31,750 -88.5%
53.03
US$1,683,798 		31,750 -88.5% 53.03 US$1,683,798
2025-04-30 2025-04-28 PlS Planned sale
Stephens John Weldon

Chief Accounting Officer

Officer
10,214 -71.3%
53.02
US$541,573 		10,214 -71.3% 53.02 US$541,573
2025-04-25 2025-04-25 PrS Proposed sale
Jeffrey D. Giles

Officer

Officer
40,000
52.26
US$2,090,400 		40,000 52.26 US$2,090,400
2025-04-04 2025-04-02 PlS Planned sale
Stephens John Weldon

Chief Accounting Officer

Officer
41,963 -91.1%
50.48
US$2,118,460 		41,963 -91.1% 50.48 US$2,118,460
2025-04-02 2025-04-02 PrS Proposed sale
John Weldon Stephens

Officer

Officer
83,927
49.38
US$4,144,315 		83,927 49.38 US$4,144,315
2025-03-13 2025-03-11 PlS Planned sale
Schaller John R

Executive Vice President

Officer
19,292 -55.5%
45.00
US$868,140 		19,292 -55.5% 45.00 US$868,140
2025-03-11 2025-03-11 PrS Proposed sale
Schaller John R

Officer

Officer
19,292
45.00
US$868,140 		19,292 45.00 US$868,140
2025-03-11 2025-03-10 PlS Planned sale
Schaller John R

Executive Vice President

Officer
21,868 -57.1%
46.82
US$1,023,860 		21,868 -57.1% 46.82 US$1,023,860
2025-03-10 2025-03-10 PrS Proposed sale
Schaller John R

Officer

Officer
21,868
46.82
US$1,023,860 		21,868 46.82 US$1,023,860
2025-02-12 2025-02-10 PlS Planned sale
Cowles Bradford A

President

Officer
25,000 -61.0%
54.48
US$1,362,082 		25,000 -61.0% 54.48 US$1,362,082
2025-01-17 2025-01-16 PlS Planned sale
Whittenburg Mark G

General Counsel and Secretary

Officer
48,026 -86.2%
55.13
US$2,647,659 		48,026 -86.2% 55.13 US$2,647,659
2025-01-17 2025-01-15 PlS Planned sale
Whittenburg Mark G

General Counsel and Secretary

Officer
1,974 -20.5%
55.29
US$109,134 		1,974 -20.5% 55.29 US$109,134
2025-01-14 2025-01-14 PlS Planned sale
Cowles Bradford A

President

Officer
12,500 -43.8%
54.07
US$675,895 		12,500 -43.8% 54.07 US$675,895
2025-01-14 2025-01-10 PlS Planned sale
Cowles Bradford A

President

Officer
12,500 -43.8%
50.50
US$631,190 		12,500 -43.8% 50.50 US$631,190
2025-01-14 2025-01-10 PlS Planned sale
Schaller John R

Executive Vice President

Officer
21,868 -55.0%
50.56
US$1,105,611 		21,868 -55.0% 50.56 US$1,105,611
2025-01-14 2025-01-10 PlS Planned sale
Schaller John R

Executive Vice President

Officer
600 -3.2%
51.41
US$30,847 		600 -3.2% 51.41 US$30,847
2025-01-14 2025-01-10 PlS Planned sale
Schaller John R

Executive Vice President

Officer
37,984 -67.2%
50.56
US$1,920,604 		37,984 -67.2% 50.56 US$1,920,604
2025-01-14 2025-01-10 PlS Planned sale
Whittenburg Mark G

General Counsel and Secretary

Officer
50,000 -86.7%
50.49
US$2,524,500 		50,000 -86.7% 50.49 US$2,524,500
2025-01-10 2025-01-10 PrS Proposed sale
Bradford A. Cowles

Officer

Officer
50,000
50.88
US$2,544,000 		50,000 50.88 US$2,544,000
2025-01-10 2025-01-10 PrS Proposed sale
Mark G. Whittenburg

Officer

Officer
150,000
50.88
US$7,632,000 		150,000 50.88 US$7,632,000
2025-01-10 2025-01-10 PrS Proposed sale
Schaller John R

Officer

Officer
60,452
50.57
US$3,057,061 		60,452 50.57 US$3,057,061
2024-12-05 2024-12-03 PlS Planned sale
2.7
LeClair Stephen O

Chief Executive Officer

Executive Director
200,000 -68.4%
54.88
US$10,976,180 		200,000 -68.4% 54.88 US$10,976,180
2024-12-05 2024-12-03 PlS Planned sale
Cowles Bradford A

President

Officer
50,000 -73.1%
55.07
US$2,753,280 		50,000 -73.1% 55.07 US$2,753,280
2024-12-05 2024-12-03 PlS Planned sale
NEWMAN MARGARET
Non-Executive Director
15,000 -56.0%
55.25
US$828,687 		15,000 -56.0% 55.25 US$828,687
2024-12-05 2024-12-03 PlS Planned sale
Giles Jeffrey D

EVP, Corporate Department

Officer
25,000 -68.3%
54.71
US$1,367,865 		25,000 -68.3% 54.71 US$1,367,865
2024-12-03 2024-12-03 PrS Proposed sale
Margaret Newman

Director

Non-Executive Director
54,123
53.99
US$2,922,101 		54,123 53.99 US$2,922,101
2024-12-03 2024-12-03 PrS Proposed sale
2.7
Stephen O. LeClair

CEO; Director

Non-Executive Director
200,000
53.99
US$10,798,000 		200,000 53.99 US$10,798,000
2024-12-03 2024-12-03 PrS Proposed sale
Jeffrey D. Giles

Officer

Officer
25,000
53.99
US$1,349,750 		25,000 53.99 US$1,349,750
2024-12-03 2024-12-03 PrS Proposed sale
Bradford A. Cowles

Officer

Officer
100,000
53.99
US$5,399,000 		100,000 53.99 US$5,399,000
2024-07-18 2024-07-16 PlS Planned sale
Gipson Dennis G
Non-Executive Director
25,000 -100.0%
53.08
US$1,327,058 		25,000 -100.0% 53.08 US$1,327,058
2024-07-16 2024-07-16 PrS Proposed sale
Dennis G. Gipson

Director

Non-Executive Director
25,000
52.03
US$1,300,750 		25,000 52.03 US$1,300,750
2024-07-17 2024-07-15 PlS Planned sale
Castellano James G
Non-Executive Director
12,500 -100.0%
52.22
US$652,786 		12,500 -100.0% 52.22 US$652,786
2024-07-12 2024-07-11 PlS Planned sale
Castellano James G
Non-Executive Director
12,300 -100.0%
50.70
US$623,569 		12,300 -100.0% 50.70 US$623,569
2024-07-12 2024-07-10 PlS Planned sale
Castellano James G
Non-Executive Director
200 -100.0%
50.01
US$10,002 		200 -100.0% 50.01 US$10,002
2024-07-10 2024-07-10 PrS Proposed sale
James G. Castellano

Director

Non-Executive Director
25,000
49.38
US$1,234,500 		25,000 49.38 US$1,234,500
2024-05-10 2024-05-08 PlS Planned sale
Witkowski Mark R

Chief Financial Officer

Officer
50,000 -67.7%
59.50
US$2,975,005 		50,000 -67.7% 59.50 US$2,975,005
2024-05-10 2024-05-08 PlS Planned sale
Witkowski Mark R

Chief Financial Officer

Officer
50,000 -67.7%
59.50
US$2,975,005 		50,000 -67.7% 59.50 US$2,975,005
2024-04-24 2024-04-23 PlS Planned sale
Stephens John Weldon

Chief Accounting Officer

Officer
9,497 -68.9%
55.19
US$524,128 		9,497 -68.9% 55.19 US$524,128
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