Ticker | Value | Shares | Price | Security | Type | Insider | Title | Return | Flags | Date |
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David M. Demski currently holds 399,623 shares of Alphatec Holdings, Inc. (ATEC), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, David M. Demski has been a net seller of ATEC stock. They have purchased $860.9K and sold $97.8M worth of shares.
David M. Demski's most recent insider trade was on Dec 11, 2025, when they sold 30,000 shares at $21.20 per share.
David M. Demski serves as Executive at Alphatec Holdings, Inc. (ATEC). They have executed 86 insider transactions totaling $98.7M over their tenure at the company.
David M. Demski holds the position of Executive at Alphatec Holdings, Inc., where they are responsible for executive-level decision-making and strategic oversight. They have been associated with the company for 14 years and currently hold a stake valued at $0.
David M. Demski has shown a selling trading pattern, with $860.9K in total purchases and $97.8M in total sales across all transactions. Their most recent activity indicates a tendency to reduce their position.
The largest transaction by David M. Demski was on Dec 17, 2020, when they sold $10.6M worth of GMED shares. This transaction involved 164,719 shares at $64.20 per share.
David M. Demski currently owns 399,623 shares of Alphatec Holdings, Inc. (ATEC), with an estimated value of $0. This stake represents their equity holdings accumulated through purchases, awards, and option exercises.
All of David M. Demski's SEC Form 4 insider trading filings are tracked on this page. Each transaction links directly to the official SEC EDGAR filing. David M. Demski has 86 Form 4 filings on record as an insider at Alphatec Holdings, Inc..
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