X0306 4 2020-09-10 0 0000277135 W.W. GRAINGER, INC. GWW 0001689107 Okray Thomas B 100 GRAINGER PARKWAY LAKE FOREST IL 60045 0 1 0 0 SVP & Chief Financial Officer Common Stock 2020-09-10 4 S 0 427 351.3705 D 9376 D Common Stock 2020-09-10 4 S 0 521 352.1122 D 8855 D Common Stock 2020-09-10 4 S 0 400 353.4425 D 8455 D Common Stock 2020-09-10 4 S 0 700 355.6143 D 7755 D Common Stock 2020-09-10 4 S 0 724 356.5414 D 7031 D Common Stock 2020-09-10 4 S 0 600 358.7033 D 6431 D Common Stock 2020-09-10 4 S 0 200 359.875 D 6231 D Stock Option 311.26 2029-03-31 Common Stock 9355 9355 D Transaction pursuant to a previously adopted Rule 10b5-1 trading program. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $350.76 to $351.68, inclusive. The reporting person undertakes to provide W.W. Grainger, Inc., any security holder of W.W. Grainger, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (3), (4), (5), (6), (7), and (8) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $351.77 to $352.50, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $352.98 to $353.75, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $355.15 to $356.11, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $356.26 to $356.95, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $358.35 to $359.21, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $359.77 to $359.98, inclusive. The stock option will fully vest in three years, where 1/3 shall vest on April 1, 2020, 1/3 shall vest on April 1, 2021, and the remainder shall vest on 4/1/2022. Hugo Dubovoy, Jr., as attorney-in-fact 2020-09-11