Summary
Updated Aug 31, 2026
Hamilton E. James is Director of COSTCO WHOLESALE CORP /NEW (COST). 2 SEC Form 4 filings on record going back to 2024, most recently on 24 October 2025.
Recent Transactions
2Every recent SEC Form 4 transaction Hamilton E. James has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Hamilton E. James go back to 2024: 2 primary Form 4 filings, an average of 0.7 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Hamilton E. James 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.
- Russell D. Miller - $4.47M of COST open-market activity in the last 12 months
- Claudine Adamo - $3.26M of COST open-market activity in the last 12 months
- Javier Polit - $2.26M of COST open-market activity in the last 12 months
- William Richard Wilcox - $2.23M of COST open-market activity in the last 12 months
- Caton Frates - $2.10M of COST open-market activity in the last 12 months
- James C. Klauer - $1.41M of COST 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 Hamilton E. James?
Hamilton E. James is a corporate insider, tracked as Director of COSTCO WHOLESALE CORP /NEW (COST). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Hamilton E. James last file a Form 4?
The most recent primary Form 4 on record is dated 24 October 2025, one of 2 filings going back to 2024.
Where can I see all of Hamilton E. James'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.
Learn More
Follow Hamilton E. James and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial