The sign on the side of a Costco is seen in Hawthorne, California, on April 4, 2025.Executives or officers of major companies filed some notable stock sales with the Securities and Exchange Commission last week.Some investors follow company insiders, especially hefty moves or a cluster of moves, on the notion that they would know better than anyone when it's the right time to buy or sell shares in their company.The data, which is from VerityData, is confirmed against the original SEC filings. These exclude ...