Transaction Details

Footnotes

Transaction pursuant to a Rule 10b5-1 trading program adopted on December 23, 2025. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,044.54 to $1,044.99, 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) through (13). | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,047.54 to $1,048.49, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,050.78 to $1,050.78, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,059.84 to $1,060.70, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,063.37 to $1,064.35, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,064.41 to $1,064.77, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,066.19 to $1,067.08, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,067.26 to $1,068.20, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,068.27 to $1,069.17, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,069.81 to $1,070.64, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,070.96 to $1,071.75, inclusive. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1,071.98 to $1,072.93, inclusive. | The stock option fully vested in three years, where 1/3 vested on April 1, 2020, 1/3 vested on April 1, 2021, and the remainder vested on April 1, 2022.