Ticker | Value | Shares | Price | Security | Type | Insider | Title | Return | Flags | Date |
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John D. Grampa currently holds 36,857 shares of MATERION Corp (MTRN), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, John D. Grampa has been a net seller of MTRN stock. They have purchased $137.5K and sold $1.7M worth of shares.
John D. Grampa's most recent insider trade was on Aug 14, 2026, when they sold 93 shares at $0.00 per share.
John D. Grampa serves as Executive at MATERION Corp (MTRN). They have executed 111 insider transactions totaling $1.9M over their tenure at the company.
John D. Grampa holds the position of Executive at MATERION Corp, where they are responsible for executive-level decision-making and strategic oversight. They have been associated with the company for 20 years and currently hold a stake valued at $0.
John D. Grampa has shown a selling trading pattern, with $137.5K in total purchases and $1.7M in total sales across all transactions. Their most recent activity indicates a tendency to reduce their position.
The largest transaction by John D. Grampa was on Nov 7, 2014, when they sold $336.5K worth of MTRN shares. This transaction involved 8,518 shares at $39.50 per share.
John D. Grampa currently owns 36,857 shares of MATERION Corp (MTRN), with an estimated value of $0. This stake represents their equity holdings accumulated through purchases, awards, and option exercises.
All of John D. Grampa's SEC Form 4 insider trading filings are tracked on this page. Each transaction links directly to the official SEC EDGAR filing. John D. Grampa has 111 Form 4 filings on record as an insider at MATERION Corp.
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