X0306 4 2016-05-31 0 0000277135 GRAINGER W W INC GWW 0001496785 Brown Laura D 100 GRAINGER PARKWAY LAKE FOREST IL 60045 0 1 0 0 Sr. VP, Inv Rel & Comm Common Stock 2016-05-31 4 M 0 1776 81.49 A 13011 D Common Stock 2016-05-31 4 S 0 1776 225.61 D 11235 D Stock Option 81.49 2016-05-31 4 M 0 1776 0.00 D 2012-04-29 2019-04-28 Common Stock 1776 0 D Stock Option 149.02 2014-04-27 2021-04-26 Common Stock 6789 6789 D Stock Option 204.01 2015-04-25 2022-04-24 Common Stock 5208 5208 D Stock Option 245.86 2016-04-24 2023-04-23 Common Stock 4197 4197 D Stock Option 248.22 2017-04-30 2024-04-29 Common Stock 3271 3271 D Stock Option 231.88 2018-04-01 2025-03-31 Common Stock 3807 3807 D Stock Option 234.38 2019-04-01 2026-03-31 Common Stock 4766 4766 D Transaction pursuant to a previously adopted Rule 10b5-1 trading program. Noni Ellison Southall, as attorney-in-fact 2016-05-31