Officer and Director Stock Transactions

Martina McIsaac, President & CEO of MSC INDUSTRIAL DIRECT CO INC, reported several stock transactions on October 3, 2026. McIsaac acquired 1173 shares of Class A Common Stock through the vesting of Restricted Stock Units (RSUs) and 187.737 shares through Dividend Equivalent Units (DEUs), both with a reported price of $0.00. Additionally, McIsaac disposed of 480.737 shares of Class A Common Stock at a price of $130.12 per share to cover tax withholding obligations arising from the vesting of RSUs and DEUs. Following these transactions, McIsaac