Summary
Updated Aug 30, 2026
Pierre Riel is Executive Vice President of COSTCO WHOLESALE CORP /NEW (COST). 2 SEC Form 4 filings on record going back to 2024, most recently on 10 September 2025. Most recent open-market trade: sold $1.79M of COST on 15 October 2024. Lifetime open-market sales: $1.79M.
Recent Transactions
3Every recent SEC Form 4 transaction Pierre Riel 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 Pierre Riel 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 Pierre Riel?
Pierre Riel is a corporate insider, tracked as Executive Vice President 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 Pierre Riel last file a Form 4?
The most recent primary Form 4 on record is dated 10 September 2025, one of 2 filings going back to 2024.
Has Pierre Riel been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($1.79M) across all tracked filings.
Where can I see all of Pierre Riel'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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