Insiders who reported open-market trades in the last 12 months at the companies David C. Sienko 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.
David C. Sienko is a corporate insider, tracked as Sr. VP, GC & Secretary of HECLA MINING CO/DE/ (HL). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did David C. Sienko last file a Form 4?
The most recent primary Form 4 on record is dated 25 June 2026, one of 3 filings going back to 2025.
David C. Sienko is Sr. VP, GC & Secretary of HECLA MINING CO/DE/ (HL). 3 SEC Form 4 filings on record going back to 2025, most recently on 25 June 2026.
Recent transactions
8
The latest 8 SEC Form 4 transactions reported by David C. Sienko.
InsiderAlpha's records for David C. Sienko go back to 2025: 3 primary Form 4 filings, an average of 1.5 per year. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
