CNM's three largest insider shareholders as of April 22, 2026 are Stephen O Leclair (Executive Chair, 66.14K shares), Stephen O Leclair (Executive Chair, 66.14K shares), Mark R Witkowski (Chief Executive Officer, 51.12K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Stephen O Leclair | Executive Chair | 66,136 | 0 | 11 Mar, 2026 |
| Stephen O Leclair | Executive Chair | 66,136 | 0 | 11 Mar, 2026 |
| Stephen O Leclair | Executive Chair | 66,136 | 0 | 11 Mar, 2026 |
| Mark R Witkowski | Chief Executive Officer | 51,119 | 0 | 13 Mar, 2026 |
| Mark R Witkowski | Chief Executive Officer | 51,119 | 0 | 13 Mar, 2026 |
| Mark R Witkowski | Chief Executive Officer | 51,119 | 0 | 13 Mar, 2026 |
| Bradford A Cowles | President | 25,491 | 0 | 13 Mar, 2026 |
| Bradford A Cowles | President | 25,491 | 0 | 13 Mar, 2026 |
| Bradford A Cowles | President | 25,491 | 0 | 13 Mar, 2026 |
| Michael G. Huebert | President | 25,337 | 0 | 13 Mar, 2026 |
| Michael G. Huebert | President | 25,337 | 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 R Schaller | Executive Vice President | 19,689 | 0 | 30 May, 2025 |
| John R Schaller | Executive Vice President | 19,689 | 0 | 30 May, 2025 |
| John Weldon Stephens | Chief Accounting Officer | 17,374 | 0 | 13 Mar, 2026 |
| John Weldon Stephens | Chief Accounting Officer | 17,374 | 0 | 13 Mar, 2026 |
| John Weldon Stephens | Chief Accounting Officer | 17,374 | 0 | 13 Mar, 2026 |
| Bhavani Amirthalingam | - | 15,156 | 0 | 26 Jun, 2025 |
| Orvin T Kimbrough | - | 13,958 | 3 | 21 Jul, 2025 |
| Orvin T Kimbrough | - | 13,958 | 3 | 21 Jul, 2025 |
| Orvin T Kimbrough | - | 13,958 | 3 | 21 Jul, 2025 |
| Margaret Newman | - | 13,958 | 0 | 26 Jun, 2025 |
| Margaret Newman | - | 13,958 | 0 | 26 Jun, 2025 |
| Dennis G Gipson | - | 13,958 | 0 | 26 Jun, 2025 |
| Kathleen M Mazzarella | - | 13,958 | 0 | 26 Jun, 2025 |
| Dennis G Gipson | - | 13,958 | 0 | 26 Jun, 2025 |
| Margaret Newman | - | 13,958 | 0 | 26 Jun, 2025 |
| Dennis G Gipson | - | 13,958 | 0 | 26 Jun, 2025 |
| Kathleen M Mazzarella | - | 13,958 | 0 | 26 Jun, 2025 |
| Carla D Harper | Senior Vp, Human Resources | 13,874 | 0 | 13 Mar, 2026 |
| Carla D Harper | Senior Vp, Human Resources | 13,874 | 0 | 13 Mar, 2026 |
| Carla D Harper | Senior Vp, Human Resources | 13,874 | 0 | 13 Mar, 2026 |
| Robert M Buck | - | 13,050 | 0 | 26 Jun, 2025 |
| Laura K Schneider | Chief Human Resources Officer | 12,873 | 0 | 05 Jun, 2025 |
| Laura K Schneider | Chief Human Resources Officer | 12,873 | 0 | 05 Jun, 2025 |
| Laura K Schneider | Chief Human Resources Officer | 12,873 | 0 | 05 Jun, 2025 |
| Robyn L Bradbury | Chief Financial Officer | 12,500 | 0 | 21 Apr, 2026 |
| Jeffrey D Giles | Evp, Corporate Development | 9,681 | 0 | 13 Mar, 2026 |
| Jeffrey D Giles | Evp, Corporate Development | 9,681 | 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 |
| Mark G Whittenburg | General Counsel And Secretary | 8,525 | 0 | 13 Mar, 2026 |
| Mark G Whittenburg | General Counsel And Secretary | 8,525 | 0 | 13 Mar, 2026 |
| James D Hope | - | 6,939 | 0 | 09 Apr, 2026 |
| James G Castellano | - | 4,638 | 0 | 26 Jun, 2025 |
| M Susan Hardwick | - | 580 | 0 | 02 Apr, 2026 |
| M Susan Hardwick | - | 580 | 0 | 02 Apr, 2026 |
| M Susan Hardwick | - | 580 | 0 | 02 Apr, 2026 |
| John R Schaller | President | 0 | 553 | 17 Jul, 2023 |
| John R Schaller | President | 0 | 553 | 17 Jul, 2023 |
| John R Schaller | President | 0 | 553 | 17 Jul, 2023 |
| 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 |
|---|---|---|---|---|---|---|---|---|
| 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 |
| 01 Apr, 2026 | M Susan Hardwick | Class A Common Stock | A | 580 | $0.00 | 580 | D | A |
| 01 Apr, 2026 | M Susan Hardwick | Class A Common Stock | A | 580 | $0.00 | 580 | D | A |
| 11 Mar, 2026 | John Weldon Stephens | Class A Common Stock | D | 107 | $49.16 | 16,438 | 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 |
| 12 Mar, 2026 | Jeffrey D Giles | Class A Common Stock | A | 3,021 | $0.00 | 9,681 | D | A |
| 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 | Carla D Harper | Class A Common Stock | D | 89 | $49.16 | 11,411 | 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 | Mark R Witkowski | Class A Common Stock | D | 1,685 | $49.16 | 32,747 | D | F |