Mark F. Lamps serves as Executive at Atkore International Group Inc., where they oversee executive responsibilities. Since joining the company, Mark F. Lamps has executed 57 insider transactions totaling $2.2M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 17, 2025 involved receiving (via award) 68.44 shares valued at $0.
Mark F. Lamps currently holds 36,981.57 shares of Atkore International Group Inc. (ATKR), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Mark F. Lamps has been a net seller of ATKR stock. They have purchased $0 and sold $2.2M worth of shares.
Mark F. Lamps's most recent insider trade was on Dec 17, 2025, when they sold 68.44 shares at $0.00 per share.
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| $65.10 |
| Discretionary |
| Nov 17, 2025 | ATKR | $64.8K | Sale | 1,000 | $64.75 | Discretionary |
| Nov 17, 2025 | ATKR | $0 | Award | 8,043 | $N/A | Discretionary |
| Nov 13, 2025 | ATKR | $39.2K | Payment | 604 | $64.83 | Discretionary |
| Nov 11, 2025 | ATKR | $25.8K | Payment | 397 | $65.11 | Discretionary |
| Aug 29, 2025 | ATKR | $0 | Award | 51.29 | $N/A | Discretionary |
| Aug 15, 2025 | ATKR | $59.4K | Sale | 1,000 | $59.37 | Discretionary |
| Aug 12, 2024 | ATKR | $47.7K | Sale | 500 | $95.47 | Planned |
| May 14, 2024 | ATKR | $78.8K | Sale | 500 | $157.67 | Planned |
| Nov 22, 2023 | ATKR | $654.3K | Sale | 5,008 | $130.66 | Planned |
| Nov 20, 2023 | ATKR | $18.1K | Sale | 138 | $131.51 | Planned |
| Nov 17, 2023 | ATKR | $118.9K | Payment | 905 | $131.41 | Discretionary |
| Nov 17, 2023 | ATKR | $0 | Award | 18,118 | $N/A | Discretionary |
| Nov 17, 2023 | ATKR | $1.2M | Payment | 9,014 | $131.41 | Discretionary |
| Nov 16, 2023 | ATKR | $37.2K | Payment | 275 | $135.23 | Planned |
| Nov 13, 2023 | ATKR | $0 | Award | 3,370 | $N/A | Discretionary |
| Nov 11, 2023 | ATKR | $48.6K | Payment | 367 | $132.29 | Discretionary |
| Feb 3, 2023 | ATKR | $359.0K | Sale | 2,480 | $144.75 | Discretionary |
| Feb 3, 2023 | ATKR | $44.4K | Option Exercise | 2,480 | $17.90 | Discretionary |
| Nov 23, 2022 | ATKR | $342.0K | Sale | 2,874 | $118.99 | Discretionary |
| Nov 22, 2022 | ATKR | $51.3K | Sale | 433 | $118.40 | Discretionary |
| Nov 21, 2022 | ATKR | $68.6K | Payment | 586 | $117.15 | Discretionary |
| Nov 21, 2022 | ATKR | $0 | Award | 10,953 | $N/A | Discretionary |
| Nov 21, 2022 | ATKR | $671.9K | Payment | 5,735 | $117.15 | Discretionary |
| Nov 17, 2022 | ATKR | $95.8K | Payment | 952 | $100.62 | Discretionary |
| Nov 16, 2022 | ATKR | $30.1K | Payment | 288 | $104.61 | Discretionary |
| Nov 11, 2022 | ATKR | $0 | Award | 2,213 | $N/A | Discretionary |
| May 6, 2022 | ATKR | $96.0K | Sale | 845 | $113.64 | Discretionary |
| Mar 4, 2022 | ATKR | $65.7K | Sale | 638 | $102.95 | Discretionary |