Core & Main's top three insider shareholders as of June 06, 2026 are Stephen O Leclair (Executive Chair, 66.14K shares), Mark R Witkowski (Chief Executive Officer, 51.12K shares), Bradford A Cowles (President, 25.49K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| James D Hope | - | 6,939 | 0 | 09 Apr, 2026 |
| Margaret Newman | - | 13,958 | 0 | 26 Jun, 2025 |
| M Susan Hardwick | - | 580 | 0 | 02 Apr, 2026 |
| Robert M Buck | - | 13,050 | 0 | 26 Jun, 2025 |
| Stephen O Leclair | Executive Chair | 66,136 | 0 | 11 Mar, 2026 |
| Bhavani Amirthalingam | - | 15,156 | 0 | 26 Jun, 2025 |
| Michael G. Huebert | President | 25,337 | 0 | 13 Mar, 2026 |
| Bradford A Cowles | President | 25,491 | 0 | 13 Mar, 2026 |
| Dennis G Gipson | - | 13,958 | 0 | 26 Jun, 2025 |
| James G Castellano | - | 4,638 | 0 | 26 Jun, 2025 |
| Jeffrey D Giles | Evp, Corporate Development | 9,681 | 0 | 13 Mar, 2026 |
| John R Schaller | Executive Vice President | 19,689 | 0 | 30 May, 2025 |
| Laura K Schneider | Chief Human Resources Officer | 12,873 | 0 | 05 Jun, 2025 |
| Mark G Whittenburg | General Counsel And Secretary | 8,525 | 0 | 13 Mar, 2026 |
| Mark R Witkowski | Chief Executive Officer | 51,119 | 0 | 13 Mar, 2026 |
| Orvin T Kimbrough | - | 13,958 | 3 | 21 Jul, 2025 |
| John Weldon Stephens | Chief Accounting Officer | 17,374 | 0 | 13 Mar, 2026 |
| Robyn L Bradbury | Chief Financial Officer | 12,500 | 0 | 21 Apr, 2026 |
| Carla D Harper | Senior Vp, Human Resources | 13,874 | 0 | 13 Mar, 2026 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 17 Apr, 2026 | Robyn L Bradbury | Class A Common Stock | A | 5,000 | $0.00 | 17,500 | D | C |
| 17 Apr, 2026 | Robyn L Bradbury | Class A Common Stock | D | 1,647 | $51.94 | 15,853 | D | S |
| 17 Apr, 2026 | Robyn L Bradbury | Class A Common Stock | D | 3,353 | $52.84 | 12,500 | D | S |
| 17 Apr, 2026 | Robyn L Bradbury | Class B Common Stock and Limited Partnership Interests | D | 5,000 | $0.00 | 152,447 | I | J |
| 17 Apr, 2026 | Robyn L Bradbury | Class B Common Stock and Limited Partnership Interests | A | 5,000 | $0.00 | 5,000 | D | J |
| 17 Apr, 2026 | Robyn L Bradbury | Class B Common Stock and Limited Partnership Interests | D | 5,000 | $0.00 | 0 | D | C |
| 07 Apr, 2026 | James D Hope | Class A Common Stock | A | 1,972 | $50.70 | 6,939 | D | P |
| 01 Apr, 2026 | M Susan Hardwick | Class A Common Stock | A | 580 | $0.00 | 580 | D | A |
| 11 Mar, 2026 | Mark R Witkowski | Class A Common Stock | D | 1,685 | $49.16 | 32,747 | D | F |
| 11 Mar, 2026 | John Weldon Stephens | Class A Common Stock | D | 107 | $49.16 | 16,438 | D | F |
| 11 Mar, 2026 | Carla D Harper | Class A Common Stock | D | 89 | $49.16 | 11,411 | D | F |
| 11 Mar, 2026 | Bradford A Cowles | Class A Common Stock | D | 607 | $49.16 | 18,405 | D | F |
| 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 | Mark G Whittenburg | Class A Common Stock | D | 331 | $49.16 | 8,525 | D | F |
| 11 Mar, 2026 | Michael G. Huebert | Class A Common Stock | D | 447 | $49.16 | 14,837 | D | F |
| 11 Mar, 2026 | Mark G Whittenburg | Class A Common Stock | D | 331 | $49.16 | 8,525 | D | F |
| 11 Mar, 2026 | Michael G. Huebert | Class A Common Stock | D | 447 | $49.16 | 14,837 | D | F |
| 11 Mar, 2026 | John Weldon Stephens | Class A Common Stock | D | 107 | $49.16 | 16,438 | D | F |
| 11 Mar, 2026 | John Weldon Stephens | Class A Common Stock | D | 107 | $49.16 | 16,438 | D | F |