Summary
Latest filing:
Adam D. Portnoy is Director of DIVERSIFIED HEALTHCARE TRUST (DHC). 26 SEC Form 4 filings on record going back to 2025, most recently on 14 September 2026. Most recent open-market trade: bought $50.00M of SVC on 2 April 2026. Lifetime open-market purchases: $50.00M.
Recent Transactions
20Every recent SEC Form 4 transaction Adam D. Portnoy has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Adam D. Portnoy go back to 2025: 26 primary Form 4 filings, an average of 13.0 per year. The typical open-market purchase is $50.00M (1 buy totaling $50.00M). The largest single buy on record is $50.00M of SVC in 2026. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Adam D. Portnoy 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.
- Laurie B. Burns - $204K of SVC open-market activity in the last 12 months
- William A. Lamkin - $190K of SVC open-market activity in the last 12 months
- Christopher J. Bilotto - $120K of SVC open-market activity in the last 12 months
- Donna D. Fraiche - $100K of SVC open-market activity in the last 12 months
- Brian E. Donley - $72K of SVC 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 Adam D. Portnoy?
Adam D. Portnoy is a corporate insider, tracked as Director of DIVERSIFIED HEALTHCARE TRUST (DHC). InsiderAlpha holds 26 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 Adam D. Portnoy submitted recently?
5 primary Form 4 filings in the last 90 days, covering 5 companies.
Has Adam D. Portnoy been buying or selling stock?
Recorded transactions: 1 open-market purchase ($50.00M) and 0 open-market sales across all tracked filings.
Where can I see all of Adam D. Portnoy'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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