Core & Main's three largest insider shareholders as of March 23, 2026 are Stephen O Leclair (Executive Chair, 66.14K shares), Mark R Witkowski (Chief Executive Officer, 34.43K shares), John R Schaller (Executive Vice President, 19.69K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Stephen O Leclair | Executive Chair | 66,136 | 0 | 11 Mar, 2026 |
| Mark R Witkowski | Chief Executive Officer | 51,119 | 0 | 13 Mar, 2026 |
| Bradford A Cowles | President | 25,491 | 0 | 13 Mar, 2026 |
| Michael G. Huebert | President | 25,337 | 0 | 13 Mar, 2026 |
| John R Schaller | Executive Vice President | 19,689 | 0 | 30 May, 2025 |
| John Weldon Stephens | Chief Accounting Officer | 17,374 | 0 | 13 Mar, 2026 |
| Orvin T Kimbrough | 13,958 | 3 | 21 Jul, 2025 | |
| Margaret Newman | 13,958 | 0 | 26 Jun, 2025 | |
| Kathleen M Mazzarella | 13,958 | 0 | 26 Jun, 2025 | |
| Dennis G Gipson | 13,958 | 0 | 26 Jun, 2025 | |
| Carla D Harper | Senior Vp, Human Resources | 13,874 | 0 | 13 Mar, 2026 |
| Laura K Schneider | Chief Human Resources Officer | 12,873 | 0 | 05 Jun, 2025 |
| Robyn L Bradbury | Chief Financial Officer | 12,500 | 0 | 13 Mar, 2026 |
| Jeffrey D Giles | Evp, Corporate Development | 9,681 | 0 | 13 Mar, 2026 |
| Mark G Whittenburg | General Counsel And Secretary | 8,525 | 0 | 13 Mar, 2026 |
| James D Hope | 4,967 | 0 | 26 Jun, 2025 | |
| Robyn L Bradbury | Chief Financial Officer | 0 | 22 | 03 Jul, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 12 Mar, 2026 | Jeffrey D Giles | Class A Common Stock | A | 3,021 | $0.00 | 9,681 | D | A |
| 11 Mar, 2026 | Mark R Witkowski | Class A Common Stock | D | 1,685 | $49.16 | 32,747 | D | F |
| 11 Mar, 2026 | Michael G. Huebert | Class A Common Stock | D | 447 | $49.16 | 14,837 | D | F |
| 11 Mar, 2026 | Carla D Harper | Class A Common Stock | D | 89 | $49.16 | 11,411 | D | F |
| 11 Mar, 2026 | Mark G Whittenburg | Class A Common Stock | D | 331 | $49.16 | 8,525 | D | F |
| 11 Mar, 2026 | Bradford A Cowles | Class A Common Stock | D | 607 | $49.16 | 18,405 | D | F |
| 11 Mar, 2026 | John Weldon Stephens | Class A Common Stock | D | 107 | $49.16 | 16,438 | D | F |
| 11 Mar, 2026 | Robyn L Bradbury | Class A Common Stock | D | 404 | $49.16 | 7,676 | D | F |
| 12 Mar, 2026 | Robyn L Bradbury | Class A Common Stock | A | 4,824 | $0.00 | 12,500 | D | A |
| 12 Mar, 2026 | John Weldon Stephens | Class A Common Stock | A | 936 | $0.00 | 17,374 | D | A |
| 12 Mar, 2026 | Michael G. Huebert | Class A Common Stock | A | 10,500 | $0.00 | 25,337 | D | A |
| 12 Mar, 2026 | Bradford A Cowles | Class A Common Stock | A | 7,086 | $0.00 | 25,491 | D | A |
| 12 Mar, 2026 | Jeffrey D Giles | Options (Rights to Buy) | A | 21,585 | $0.00 | 21,585 | D | A |
| 12 Mar, 2026 | Mark R Witkowski | Class A Common Stock | A | 18,372 | $0.00 | 51,119 | D | A |
| 12 Mar, 2026 | Carla D Harper | Class A Common Stock | A | 2,463 | $0.00 | 13,874 | D | A |
| 12 Mar, 2026 | Mark R Witkowski | Options (Rights to Buy) | A | 131,382 | $0.00 | 131,382 | D | A |
| 12 Mar, 2026 | Michael G. Huebert | Options (Rights to Buy) | A | 37,539 | $0.00 | 37,539 | D | A |
| 12 Mar, 2026 | John Weldon Stephens | Options (Rights to Buy) | A | 6,684 | $0.00 | 6,684 | D | A |
| 12 Mar, 2026 | Carla D Harper | Options (Rights to Buy) | A | 17,598 | $0.00 | 17,598 | D | A |
| 12 Mar, 2026 | Bradford A Cowles | Options (Rights to Buy) | A | 50,676 | $0.00 | 50,676 | D | A |