144 0001451437 XXXXXXXX LIVE 0000277135 W.W. Grainger, Inc. 001-05684 100 Grainger Parkway Lake Forest IL 60045-5201 8475351000 DONALD MACPHERSON Director Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

26686 25916375.76 47549337 12/04/2025 NYSE Common 12/04/2025 Exercise of Stock Options Issuer N 26686 12/04/2025 Cash Y The securities to be sold will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment will be the dates of exercise/sale. 12/04/2025 09/04/2025 /s/ Donald G. Macpherson