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Michael S. Weiss currently holds 9,156,086 shares of KERYX BIOPHARMACEUTICALS INC (KERX), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Michael S. Weiss has been a net seller of KERX stock. They have purchased $4.7M and sold $17.6M worth of shares.
Michael S. Weiss's most recent insider trade was on Nov 5, 2025, when they sold 803,717 shares at $0.00 per share.
Michael S. Weiss serves as Executive at KERYX BIOPHARMACEUTICALS INC (KERX). They have executed 278 insider transactions totaling $22.3M over their tenure at the company.
Michael S. Weiss holds the position of Executive at KERYX BIOPHARMACEUTICALS INC, 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.
Michael S. Weiss has shown a selling trading pattern, with $4.7M in total purchases and $17.6M in total sales across all transactions. Their most recent activity indicates a tendency to reduce their position.
The largest transaction by Michael S. Weiss was on Aug 11, 2023, when they purchased $1.0M worth of TGTX shares. This transaction involved 100,000 shares at $10.13 per share.
Michael S. Weiss currently owns 9,156,086 shares of KERYX BIOPHARMACEUTICALS INC (KERX), with an estimated value of $0. This stake represents their equity holdings accumulated through purchases, awards, and option exercises.
All of Michael S. Weiss's SEC Form 4 insider trading filings are tracked on this page. Each transaction links directly to the official SEC EDGAR filing. Michael S. Weiss has 278 Form 4 filings on record as an insider at KERYX BIOPHARMACEUTICALS INC.
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