Summary
Updated Aug 30, 2026
Joan M. Lammtennant is Director of OCTAVE SPECIALTY GROUP INC (OSG). 11 SEC Form 4 filings on record going back to 2024, most recently on 7 July 2026.
Recent Transactions
5Every recent SEC Form 4 transaction Joan M. Lammtennant 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 Joan M. Lammtennant 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.
- Claude Leblanc - $213K of OSG open-market activity in the last 12 months
- R. Sharon Smith - $205 of OSG 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 Joan M. Lammtennant?
Joan M. Lammtennant is a corporate insider, tracked as Director of OCTAVE SPECIALTY GROUP INC (OSG). InsiderAlpha holds 11 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 Joan M. Lammtennant submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Where can I see all of Joan M. Lammtennant'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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