Summary
Updated Aug 30, 2026
David M. Demski files SEC Form 4 reports at Alphatec Holdings, Inc. (ATEC). 4 SEC Form 4 filings on record going back to 2024, most recently on 12 June 2026.
Recent Transactions
4Every recent SEC Form 4 transaction David M. Demski has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies David M. Demski files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Jennifer N. Pritzker - $15.65M of ATEC open-market activity in the last 12 months
- Squadron Capital Holdings LLC - $15.65M of ATEC open-market activity in the last 12 months
- Squadron Capital LLC - $10.36M of ATEC open-market activity in the last 12 months
- David R. Pelizzon - $10.36M of ATEC open-market activity in the last 12 months
- Patrick Miles - $10.22M of ATEC open-market activity in the last 12 months
- David Sponsel - $6.13M of ATEC open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is David M. Demski?
David M. Demski is a corporate insider of Alphatec Holdings, Inc. (ATEC). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has David M. Demski submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Where can I see all of David M. Demski's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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