A. Mark Zeffiro serves as Executive at TRIMAS CORP, where they oversee executive responsibilities. Since joining the company, A. Mark Zeffiro has executed 97 insider transactions totaling $5.8M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 29, 2026 involved receiving (via award) 2,275 shares valued at $0.
A. Mark Zeffiro currently holds 23,821.72 shares of TRIMAS CORP (TRS), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, A. Mark Zeffiro has been a net seller of TRS stock. They have purchased $251.6K and sold $5.6M worth of shares.
A. Mark Zeffiro's most recent insider trade was on Jan 29, 2026, when they sold 2,275 shares at $0.00 per share.
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| $N/A |
| Discretionary |
| Aug 29, 2025 | ATKR | $0 | Award | 73.76 | $N/A | Discretionary |
| May 22, 2024 | ATKR | $308.2K | Sale | 2,000 | $154.11 | Discretionary |
| Jan 30, 2024 | ATKR | $0 | Award | 956 | $N/A | Discretionary |
| May 24, 2023 | ATKR | $89.1K | Sale | 750 | $118.82 | Discretionary |
| Jan 27, 2023 | ATKR | $0 | Award | 1,099 | $N/A | Discretionary |
| Jan 27, 2022 | ATKR | $0 | Award | 1,491 | $N/A | Discretionary |
| May 11, 2021 | ATKR | $856.9K | Sale | 10,000 | $85.69 | Discretionary |
| Jan 28, 2021 | ATKR | $0 | Award | 2,597 | $N/A | Discretionary |
| Jan 30, 2020 | ATKR | $0 | Award | 2,682 | $N/A | Discretionary |
| Feb 5, 2019 | ATKR | $0 | Award | 4,683 | $N/A | Discretionary |
| Mar 1, 2018 | HZN | $12.2K | Payment | 1,483 | $8.24 | Discretionary |
| Mar 1, 2018 | HZN | $0 | Award | 46,015 | $N/A | Discretionary |
| Mar 1, 2018 | HZN | $67.0K | Payment | 7,601 | $8.81 | Discretionary |
| Jan 31, 2018 | ATKR | $0 | Award | 4,277 | $N/A | Discretionary |
| Sep 19, 2017 | HZN | $160.5K | Sale | 9,870 | $16.26 | Discretionary |
| Sep 18, 2017 | HZN | $281.8K | Sale | 17,130 | $16.45 | Discretionary |
| May 2, 2017 | ATKR | $0 | Award | 3,353 | $N/A | Discretionary |
| Mar 14, 2017 | HZN | $146.6K | Purchase | 10,800 | $13.57 | Discretionary |
| Mar 1, 2017 | HZN | $0 | Award | 20,742 | $N/A | Discretionary |
| Mar 5, 2016 | HZN | $32.7K | Payment | 3,115 | $10.49 | Discretionary |
| Mar 1, 2016 | HZN | $110.4K | Payment | 10,948 | $10.08 | Discretionary |
| Mar 1, 2016 | HZN | $0 | Award | 52,083 | $N/A | Discretionary |
| Mar 1, 2016 | HZN | $0 | Award | 40,000 | $N/A | Discretionary |
| Oct 29, 2015 | HZN | $14.0K | Payment | 1,593 | $8.76 | Discretionary |
| Sep 5, 2015 | HZN | $7.4K | Payment | 774 | $9.55 | Discretionary |
| Aug 15, 2015 | HZN | $0 | Award | 84,473 | $N/A | Discretionary |
| Aug 15, 2015 | HZN | $0 | Award | 11,813 | $N/A | Discretionary |
| Aug 15, 2015 | HZN | $0 | Award | 84,473 | $N/A | Discretionary |