CNM

insider transactions

Core & Main, Inc. — buys & sells by directors, officers and 10% owners (SEC Form 4).

30D 90D 1Y

Net shares · 365d

-3.0K

2.0K buy · 5.0K sell

Net value · 365d

-$162.8K

$100.0K in · $262.7K out

Sentiment · 365d

Net selling

28% buying · 72% selling

Open-market trades · 365d

2.0K buy · 5.0K sell

Net buy / sell volume

Tap or hover the chart for daily net volume. Green = net buying, red = net selling.

All transactions

Exercise·C
Apr 17, 26

Robyn L Bradbury KEY

Chief Financial Officer · 10b5-1

$0

5.0K sh

Own New
Other·J
Apr 17, 26

Robyn L Bradbury KEY

Chief Financial Officer · 10b5-1

$0

5.0K sh
Sell·S
Apr 17, 26

Robyn L Bradbury KEY

Chief Financial Officer · 10b5-1

$177.2K

3.4K sh · $52.84

Own -21%
Sell·S
Apr 17, 26

Robyn L Bradbury KEY

Chief Financial Officer · 10b5-1

$85.5K

1.6K sh · $51.94

Own -9%
Exercise·C
Apr 17, 26

Robyn L Bradbury KEY

Chief Financial Officer · 10b5-1

$0

5.0K sh

Own +40%
Buy·P
Apr 7, 26

James D Hope

Director

$100.0K

2.0K sh · $50.70

Own +40%
Grant·A
Apr 1, 26

Susan M Hardwick

Director

$0

580 sh

Own New
Grant·A
Mar 12, 26

Jeffrey D Giles

EVP, Corporate Development

$0

21.6K sh

Own New
Grant·A
Mar 12, 26

Jeffrey D Giles

EVP, Corporate Development

$0

3.0K sh

Own +45%
Grant·A
Mar 12, 26

Mark R Witkowski KEY

Chief Executive Officer

$0

131.4K sh

Own New
Grant·A
Mar 12, 26

Mark R Witkowski KEY

Chief Executive Officer

$0

18.4K sh

Own +56%
Grant·A
Mar 12, 26

Bradford A Cowles KEY

President

$0

50.7K sh

Own New
Grant·A
Mar 12, 26

Bradford A Cowles KEY

President

$0

7.1K sh

Own +39%
Grant·A
Mar 12, 26

John Weldon Stephens

Chief Accounting Officer

$0

6.7K sh

Own New
Grant·A
Mar 12, 26

John Weldon Stephens

Chief Accounting Officer

$0

936 sh

Own +6%
Grant·A
Mar 12, 26

Michael G. Huebert KEY

President

$0

37.5K sh

Own New
Grant·A
Mar 12, 26

Michael G. Huebert KEY

President

$0

10.5K sh

Own +71%
Grant·A
Mar 12, 26

Carla D Harper

Senior VP, Human Resources

$0

17.6K sh

Own New
Grant·A
Mar 12, 26

Carla D Harper

Senior VP, Human Resources

$0

2.5K sh

Own +22%
Grant·A
Mar 12, 26

Robyn L Bradbury KEY

Chief Financial Officer

$0

34.5K sh

Own New
Grant·A
Mar 12, 26

Robyn L Bradbury KEY

Chief Financial Officer

$0

4.8K sh

Own +63%
Other·F
Mar 11, 26

Mark G Whittenburg

General Counsel and Secretary

$16.3K

331 sh · $49.16

Own -4%
Other·F
Mar 11, 26

Mark R Witkowski KEY

Chief Executive Officer

$82.8K

1.7K sh · $49.16

Own -5%
Other·F
Mar 11, 26

Bradford A Cowles KEY

President

$29.8K

607 sh · $49.16

Own -3%
Other·F
Mar 11, 26

John Weldon Stephens

Chief Accounting Officer

$5.3K

107 sh · $49.16

Own -1%
Other·F
Mar 11, 26

Michael G. Huebert KEY

President

$22.0K

447 sh · $49.16

Own -3%
Other·F
Mar 11, 26

Carla D Harper

Senior VP, Human Resources

$4.4K

89 sh · $49.16

Own -1%
Other·F
Mar 11, 26

Robyn L Bradbury KEY

Chief Financial Officer

$19.9K

404 sh · $49.16

Own -5%
Other·F
Mar 10, 26

Mark G Whittenburg

General Counsel and Secretary

$27.5K

557 sh · $49.38

Own -6%
Other·F
Mar 10, 26

Carla D Harper

Senior VP, Human Resources

$9.3K

189 sh · $49.38

Own -2%
Other·F
Mar 10, 26

John Weldon Stephens

Chief Accounting Officer

$9.8K

198 sh · $49.38

Own -1%
Other·F
Mar 10, 26

Bradford A Cowles KEY

President

$36.6K

741 sh · $49.38

Own -4%
Other·F
Mar 10, 26

Mark R Witkowski KEY

Chief Executive Officer

$46.3K

937 sh · $49.38

Own -3%
Other·F
Mar 10, 26

Stephen O Leclair KEY

Executive Chair

$152.1K

3.1K sh · $49.38

Own -4%
Other·F
Mar 10, 26

Robyn L Bradbury KEY

Chief Financial Officer

$10.1K

205 sh · $49.38

Own -2%
Other·F
Mar 9, 26

Mark G Whittenburg

General Counsel and Secretary

$13.9K

278 sh · $49.96

Own -3%
Other·F
Mar 9, 26

Carla D Harper

Senior VP, Human Resources

$3.8K

77 sh · $49.96

Own -1%
Other·F
Mar 9, 26

John Weldon Stephens

Chief Accounting Officer

$4.7K

94 sh · $49.96

Own -1%
Other·F
Mar 9, 26

Michael G. Huebert KEY

President

$17.5K

350 sh · $49.96

Own -2%
Other·F
Mar 9, 26

Bradford A Cowles KEY

President

$21.7K

435 sh · $49.96

Own -2%
Other·F
Mar 9, 26

Mark R Witkowski KEY

Chief Executive Officer

$23.9K

478 sh · $49.96

Own -1%
Other·F
Mar 9, 26

Stephen O Leclair KEY

Executive Chair

$75.9K

1.5K sh · $49.96

Own -2%
Other·F
Mar 9, 26

Robyn L Bradbury KEY

Chief Financial Officer

$13.5K

270 sh · $49.96

Own -3%
Grant·A
Jan 26, 26

Jeffrey D Giles

EVP, Corporate Development

$0

10.6K sh

Own New
Grant·A
Jan 26, 26

Jeffrey D Giles

EVP, Corporate Development

$0

4.4K sh

Own +192%
Other·G
Dec 31, 25

Mark G Whittenburg

General Counsel and Secretary

$0

25.5K sh

Own -10%

Date▾	Insider	Role	Type	Shares	Own Δ	Price	Value
Apr 17, 2026	Robyn L Bradbury KEY 10b5-1	Chief Financial Officer	Exercise C	5.0K	New	—	$0
Apr 17, 2026	Robyn L Bradbury KEY 10b5-1	Chief Financial Officer	Other J	5.0K	—	—	$0
Apr 17, 2026	Robyn L Bradbury KEY 10b5-1	Chief Financial Officer	Sell S	3.4K	-21%	$52.84	$177.2K
Apr 17, 2026	Robyn L Bradbury KEY 10b5-1	Chief Financial Officer	Sell S	1.6K	-9%	$51.94	$85.5K
Apr 17, 2026	Robyn L Bradbury KEY 10b5-1	Chief Financial Officer	Exercise C	5.0K	+40%	—	$0
Apr 7, 2026	James D Hope	Director	Buy P	2.0K	+40%	$50.70	$100.0K
Apr 1, 2026	Susan M Hardwick	Director	Grant A	580	New	—	$0
Mar 12, 2026	Jeffrey D Giles	EVP, Corporate Development	Grant A	21.6K	New	—	$0
Mar 12, 2026	Jeffrey D Giles	EVP, Corporate Development	Grant A	3.0K	+45%	—	$0
Mar 12, 2026	Mark R Witkowski KEY	Chief Executive Officer	Grant A	131.4K	New	—	$0
Mar 12, 2026	Mark R Witkowski KEY	Chief Executive Officer	Grant A	18.4K	+56%	—	$0
Mar 12, 2026	Bradford A Cowles KEY	President	Grant A	50.7K	New	—	$0
Mar 12, 2026	Bradford A Cowles KEY	President	Grant A	7.1K	+39%	—	$0
Mar 12, 2026	John Weldon Stephens	Chief Accounting Officer	Grant A	6.7K	New	—	$0
Mar 12, 2026	John Weldon Stephens	Chief Accounting Officer	Grant A	936	+6%	—	$0
Mar 12, 2026	Michael G. Huebert KEY	President	Grant A	37.5K	New	—	$0
Mar 12, 2026	Michael G. Huebert KEY	President	Grant A	10.5K	+71%	—	$0
Mar 12, 2026	Carla D Harper	Senior VP, Human Resources	Grant A	17.6K	New	—	$0
Mar 12, 2026	Carla D Harper	Senior VP, Human Resources	Grant A	2.5K	+22%	—	$0
Mar 12, 2026	Robyn L Bradbury KEY	Chief Financial Officer	Grant A	34.5K	New	—	$0
Mar 12, 2026	Robyn L Bradbury KEY	Chief Financial Officer	Grant A	4.8K	+63%	—	$0
Mar 11, 2026	Mark G Whittenburg	General Counsel and Secretary	Other F	331	-4%	$49.16	$16.3K
Mar 11, 2026	Mark R Witkowski KEY	Chief Executive Officer	Other F	1.7K	-5%	$49.16	$82.8K
Mar 11, 2026	Bradford A Cowles KEY	President	Other F	607	-3%	$49.16	$29.8K
Mar 11, 2026	John Weldon Stephens	Chief Accounting Officer	Other F	107	-1%	$49.16	$5.3K
Mar 11, 2026	Michael G. Huebert KEY	President	Other F	447	-3%	$49.16	$22.0K
Mar 11, 2026	Carla D Harper	Senior VP, Human Resources	Other F	89	-1%	$49.16	$4.4K
Mar 11, 2026	Robyn L Bradbury KEY	Chief Financial Officer	Other F	404	-5%	$49.16	$19.9K
Mar 10, 2026	Mark G Whittenburg	General Counsel and Secretary	Other F	557	-6%	$49.38	$27.5K
Mar 10, 2026	Carla D Harper	Senior VP, Human Resources	Other F	189	-2%	$49.38	$9.3K
Mar 10, 2026	John Weldon Stephens	Chief Accounting Officer	Other F	198	-1%	$49.38	$9.8K
Mar 10, 2026	Bradford A Cowles KEY	President	Other F	741	-4%	$49.38	$36.6K
Mar 10, 2026	Mark R Witkowski KEY	Chief Executive Officer	Other F	937	-3%	$49.38	$46.3K
Mar 10, 2026	Stephen O Leclair KEY	Executive Chair	Other F	3.1K	-4%	$49.38	$152.1K
Mar 10, 2026	Robyn L Bradbury KEY	Chief Financial Officer	Other F	205	-2%	$49.38	$10.1K
Mar 9, 2026	Mark G Whittenburg	General Counsel and Secretary	Other F	278	-3%	$49.96	$13.9K
Mar 9, 2026	Carla D Harper	Senior VP, Human Resources	Other F	77	-1%	$49.96	$3.8K
Mar 9, 2026	John Weldon Stephens	Chief Accounting Officer	Other F	94	-1%	$49.96	$4.7K
Mar 9, 2026	Michael G. Huebert KEY	President	Other F	350	-2%	$49.96	$17.5K
Mar 9, 2026	Bradford A Cowles KEY	President	Other F	435	-2%	$49.96	$21.7K
Mar 9, 2026	Mark R Witkowski KEY	Chief Executive Officer	Other F	478	-1%	$49.96	$23.9K
Mar 9, 2026	Stephen O Leclair KEY	Executive Chair	Other F	1.5K	-2%	$49.96	$75.9K
Mar 9, 2026	Robyn L Bradbury KEY	Chief Financial Officer	Other F	270	-3%	$49.96	$13.5K
Jan 26, 2026	Jeffrey D Giles	EVP, Corporate Development	Grant A	10.6K	New	—	$0
Jan 26, 2026	Jeffrey D Giles	EVP, Corporate Development	Grant A	4.4K	+192%	—	$0
Dec 31, 2025	Mark G Whittenburg	General Counsel and Secretary	Other G	25.5K	-10%	—	$0

About CNM insider trading

This page tracks insider transactions for Core & Main, Inc. (CNM) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.