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Katherine A. High currently holds 13,000 shares of Spark Therapeutics, Inc. (ONCE), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Katherine A. High has been a net seller of ONCE stock. They have purchased $16.1K and sold $12.8M worth of shares.
Katherine A. High's most recent insider trade was on Jun 5, 2026, when they sold 13,000 shares at $0.00 per share.
Katherine A. High serves as Executive at Spark Therapeutics, Inc. (ONCE). They have executed 74 insider transactions totaling $12.8M over their tenure at the company.
Katherine A. High holds the position of Executive at Spark Therapeutics, Inc., where they are responsible for executive-level decision-making and strategic oversight. They have been associated with the company for 12 years and currently hold a stake valued at $0.
Katherine A. High has shown a selling trading pattern, with $16.1K in total purchases and $12.8M in total sales across all transactions. Their most recent activity indicates a tendency to reduce their position.
The largest transaction by Katherine A. High was on Dec 17, 2019, when they sold $31.9M worth of ONCE shares. This transaction involved 278,834 shares at $114.50 per share.
Katherine A. High currently owns 13,000 shares of Spark Therapeutics, Inc. (ONCE), with an estimated value of $0. This stake represents their equity holdings accumulated through purchases, awards, and option exercises.
All of Katherine A. High's SEC Form 4 insider trading filings are tracked on this page. Each transaction links directly to the official SEC EDGAR filing. Katherine A. High has 74 Form 4 filings on record as an insider at Spark Therapeutics, Inc..
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