Summary
Updated Aug 31, 2026
Mortimer Berkowitz III files SEC Form 4 reports at Alphatec Holdings, Inc. (ATEC). 2 SEC Form 4 filings on record going back to 2025, most recently on 12 June 2026. Most recent open-market trade: sold $998K of ATEC on 9 September 2025. Lifetime open-market sales: $998K.
Recent Transactions
2Every recent SEC Form 4 transaction Mortimer Berkowitz III 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 Mortimer Berkowitz III 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 Mortimer Berkowitz III?
Mortimer Berkowitz III is a corporate insider of Alphatec Holdings, Inc. (ATEC). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Mortimer Berkowitz III submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Mortimer Berkowitz III been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($998K) across all tracked filings.
Where can I see all of Mortimer Berkowitz III'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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