There have been 50 recent insider transactions recorded for Core & Main, Inc. (CNM), including 13 buys and 32 sells. Total insider buying was valued at $318.36K and total insider selling at $11.49M.
Notable insiders with recent activity include Hardwick M Susan, Burkhardt Jackie M, Huebert Michael G.. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — CNM
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-04-01 |
Hardwick M Susan |
Director |
Unknown |
- |
- |
- |
- |
| 2026-04-01 |
Hardwick M Susan |
Director |
RSU Award |
580 |
- |
- |
580 |
| 2026-04-01 |
Burkhardt Jackie M |
General Counsel and Cco |
Unknown |
5,123 |
$3.24 |
$16.6K |
- |
| 2026-03-12 |
Huebert Michael G. |
President |
RSU Award |
10,500 |
- |
- |
25,337 |
| 2026-03-12 |
Cowles Bradford A |
President |
RSU Award |
7,086 |
- |
- |
25,491 |
| 2026-03-12 |
Giles Jeffrey D |
EVP, Corporate Development |
RSU Award |
3,021 |
- |
- |
9,681 |
| 2026-03-12 |
Witkowski Mark R |
Chief Executive Officer |
RSU Award |
18,372 |
- |
- |
51,119 |
| 2026-03-12 |
Stephens John Weldon |
Chief Accounting Officer |
RSU Award |
6,684 |
$47.63 |
$318.36K |
6,684 |
| 2026-03-12 |
Bradbury Robyn L |
Chief Financial Officer |
RSU Award |
4,824 |
- |
- |
12,500 |
| 2026-03-12 |
Harper Carla D |
Senior VP, Human Resources |
RSU Award |
2,463 |
- |
- |
13,874 |
| 2026-03-11 |
Huebert Michael G. |
President |
Tax Withholding of RSU |
447 |
$49.16 |
$21.97K |
14,837 |
| 2026-03-11 |
Cowles Bradford A |
President |
Tax Withholding of RSU |
607 |
$49.16 |
$29.84K |
18,405 |
| 2026-03-11 |
Whittenburg Mark G |
General Counsel and Secretary |
Tax Withholding of RSU |
331 |
$49.16 |
$16.27K |
8,525 |
| 2026-03-11 |
Witkowski Mark R |
Chief Executive Officer |
Tax Withholding of RSU |
1,685 |
$49.16 |
$82.83K |
32,747 |
| 2026-03-11 |
Stephens John Weldon |
Chief Accounting Officer |
Tax Withholding of RSU |
107 |
$49.16 |
$5.26K |
16,438 |
| 2026-03-11 |
Bradbury Robyn L |
Chief Financial Officer |
Tax Withholding of RSU |
404 |
$49.16 |
$19.86K |
7,676 |
| 2026-03-11 |
Harper Carla D |
Senior VP, Human Resources |
Tax Withholding of RSU |
89 |
$49.16 |
$4.38K |
11,411 |
| 2026-03-10 |
Leclair Stephen O |
Executive Chair |
Tax Withholding of RSU |
3,081 |
$49.38 |
$152.14K |
66,136 |
| 2026-03-10 |
Cowles Bradford A |
President |
Tax Withholding of RSU |
741 |
$49.38 |
$36.59K |
19,012 |
| 2026-03-10 |
Whittenburg Mark G |
General Counsel and Secretary |
Tax Withholding of RSU |
557 |
$49.38 |
$27.5K |
8,856 |
| 2026-03-10 |
Witkowski Mark R |
Chief Executive Officer |
Tax Withholding of RSU |
937 |
$49.38 |
$46.27K |
34,432 |
| 2026-03-10 |
Stephens John Weldon |
Chief Accounting Officer |
Tax Withholding of RSU |
198 |
$49.38 |
$9.78K |
16,545 |
| 2026-03-10 |
Bradbury Robyn L |
Chief Financial Officer |
Tax Withholding of RSU |
205 |
$49.38 |
$10.12K |
8,080 |
| 2026-03-10 |
Harper Carla D |
Senior VP, Human Resources |
Tax Withholding of RSU |
189 |
$49.38 |
$9.33K |
11,500 |
| 2026-03-09 |
Leclair Stephen O |
Executive Chair |
Tax Withholding of RSU |
1,519 |
$49.96 |
$75.89K |
69,217 |
| 2026-03-09 |
Huebert Michael G. |
President |
Tax Withholding of RSU |
350 |
$49.96 |
$17.49K |
15,284 |
| 2026-03-09 |
Cowles Bradford A |
President |
Tax Withholding of RSU |
435 |
$49.96 |
$21.73K |
19,753 |
| 2026-03-09 |
Whittenburg Mark G |
General Counsel and Secretary |
Tax Withholding of RSU |
278 |
$49.96 |
$13.89K |
9,413 |
| 2026-03-09 |
Witkowski Mark R |
Chief Executive Officer |
Tax Withholding of RSU |
478 |
$49.96 |
$23.88K |
35,369 |
| 2026-03-09 |
Stephens John Weldon |
Chief Accounting Officer |
Tax Withholding of RSU |
94 |
$49.96 |
$4.7K |
16,743 |
| 2026-03-09 |
Bradbury Robyn L |
Chief Financial Officer |
Tax Withholding of RSU |
270 |
$49.96 |
$13.49K |
8,285 |
| 2026-03-09 |
Harper Carla D |
Senior VP, Human Resources |
Tax Withholding of RSU |
77 |
$49.96 |
$3.85K |
11,689 |
| 2026-01-26 |
Giles Jeffrey D |
EVP, Corporate Development |
Unknown |
150,177 |
- |
- |
- |
| 2026-01-26 |
Giles Jeffrey D |
EVP, Corporate Development |
RSU Award |
4,377 |
- |
- |
6,660 |
| 2025-12-31 |
Whittenburg Mark G |
General Counsel and Secretary |
Gift (Given) |
25,500 |
- |
- |
227,312 |
| 2025-09-12 |
Stephens John Weldon |
Chief Accounting Officer |
Option Exercise (Sell) |
12,717 |
$20.81 |
$264.64K |
- |
| 2025-09-03 |
Harper Carla D |
Senior VP, Human Resources |
Unknown |
4,506 |
$50.12 |
$225.84K |
- |
| 2025-09-03 |
Harper Carla D |
Senior VP, Human Resources |
RSU Award |
2,091 |
- |
- |
11,766 |
| 2025-08-18 |
Witkowski Mark R |
Chief Executive Officer |
Conversion (Sell) |
100,000 |
- |
- |
- |
| 2025-07-22 |
Huebert Michael G. |
President |
Tax Withholding of RSU |
1,337 |
$65.03 |
$86.95K |
15,634 |
| 2025-07-22 |
Bradbury Robyn L |
Chief Financial Officer |
Conversion (Sell) |
5,000 |
- |
- |
- |
| 2025-07-18 |
Castellano James G |
Director |
Informative Sell |
43,994 |
$61.98 |
$2.73M |
- |
| 2025-07-18 |
Kimbrough Orvin T |
Director |
Conversion (Sell) |
23,957 |
- |
- |
- |
| 2025-07-17 |
Witkowski Mark R |
Chief Executive Officer |
Conversion (Sell) |
100,000 |
- |
- |
- |
| 2025-07-07 |
Leclair Stephen O |
Executive Chair |
Informative Sell |
44,972 |
$61.91 |
$2.78M |
70,736 |
| 2025-07-03 |
Leclair Stephen O |
Executive Chair |
Informative Sell |
80,028 |
$62.27 |
$4.98M |
70,736 |
| 2025-07-01 |
Bradbury Robyn L |
Chief Financial Officer |
Conversion (Sell) |
24,957 |
- |
- |
- |
| 2025-06-24 |
Mazzarella Kathleen M |
Director |
RSU Award |
2,189 |
- |
- |
13,958 |
| 2025-06-24 |
Hope James D |
Director |
RSU Award |
2,189 |
- |
- |
4,967 |
| 2025-06-24 |
Newman Margaret |
Director |
RSU Award |
2,189 |
- |
- |
13,958 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
