Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies John Richard Sylvester 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.
- Gerard J. Michel - $198K in DCTH purchases and sales in the last 12 months
- Sandra Pennell - $50K in DCTH purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is John Richard Sylvester?
John Richard Sylvester is a corporate insider of DELCATH SYSTEMS, INC. (DCTH). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did John Richard Sylvester last file a Form 4?
The most recent primary Form 4 on record is dated 14 May 2026, one of 2 filings going back to 2025.
Has John Richard Sylvester been buying or selling stock?
Recorded transactions: 1 open-market purchase ($39K) and 0 open-market sales across all tracked filings.
