David M. Demski

David M. Demski is a declared insider at 3 companies (board member); the most frequent names are Alphatec Holdings, Inc., Axonics, Inc. and Paragon 28, Inc. Between 22 October 2021 and 10 June 2026, the trades on record add up to 15 filings.

In open-market terms, that means 3 purchases worth €791k on one side and 1 sale worth €544k on the other. Netting one side against the other leaves €248k of net buying. A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. Other entries cover 9 share grants.

In size, the median ticket on the buying side is €254k. On 2 out of 3 purchases, another insider of the same company was buying within the same 30 days. When several insiders buy within a few weeks of each other, analysts speak of a cluster purchase.

The latest filing, published on 12 June 2026, reports a share grant in Alphatec Holdings, Inc. The most recent open-market purchase was published on 21 August 2024, 788 days ago. The median gap between a trade and its publication by SEC (Form 4) is 2 days. For comparison, the SEC allows two business days to file a Form 4. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.