Costco Executive Vice President William Richard Wilcox sold 1,100 shares on Oct. 13, 2026 at $958.21 per share, for total proceeds of about $1.05 million. The sale was an open-market transaction and, based on the information provided, was not made under a pre-scheduled Rule 10b5-1 trading plan, meaning it was not automatically timed in advance. As an Executive Vice President, Wilcox is a senior leader who may have visibility into operating performance and strategic initiatives. That said, insider sales are often driven by personal factors such as taxes, diversification, or liquidity needs, and a single sale does not, by itself, indicate anything definitive about the company’s fundamentals. Over the past 30 days, this filing is the only insider trade listed for Costco, so there isn’t a documented pattern in the provided data of multiple executives selling during the same period. Investors typically get the most context by checking whether the insider still holds a meaningful stake after the sale and whether additional sales appear in subsequent filings.