X0306 4 2015-12-01 0 0000277135 GRAINGER W W INC GWW 0001187060 HOWARD JOHN L 100 GRAINGER PARKWAY LAKE FOREST IL 60045 0 1 0 0 Sr. VP and General Counsel Common Stock 2015-12-01 4 M 0 10000 83.08 A 47692 D Common Stock 2015-12-01 4 S 0 200 200.06 D 47492 D Common Stock 2015-12-01 4 S 0 1000 200.09 D 46492 D Common Stock 2015-12-01 4 S 0 200 200.13 D 46292 D Common Stock 2015-12-01 4 S 0 100 200.19 D 46192 D Common Stock 2015-12-01 4 S 0 100 200.20 D 46092 D Common Stock 2015-12-01 4 S 0 100 200.40 D 45992 D Common Stock 2015-12-01 4 S 0 100 200.45 D 45892 D Common Stock 2015-12-01 4 S 0 400 200.63 D 45492 D Common Stock 2015-12-01 4 S 0 215 200.64 D 45277 D Common Stock 2015-12-01 4 S 0 100 200.65 D 45177 D Common Stock 2015-12-01 4 S 0 100 200.80 D 45077 D Common Stock 2015-12-01 4 S 0 100 200.81 D 44977 D Common Stock 2015-12-01 4 S 0 200 200.87 D 44777 D Common Stock 2015-12-01 4 S 0 100 201.01 D 44677 D Common Stock 2015-12-01 4 S 0 100 201.02 D 44577 D Common Stock 2015-12-01 4 S 0 300 201.03 D 44277 D Common Stock 2015-12-01 4 S 0 100 201.04 D 44177 D Common Stock 2015-12-01 4 S 0 300 201.05 D 43877 D Common Stock 2015-12-01 4 S 0 100 201.07 D 43777 D Common Stock 2015-12-01 4 S 0 300 201.08 D 43477 D Common Stock 2015-12-01 4 S 0 100 201.09 D 43377 D Common Stock 2015-12-01 4 S 0 1000 201.15 D 42377 D Common Stock 2015-12-01 4 S 0 800 201.16 D 41577 D Stock Option 83.08 2015-12-01 4 M 0 10000 0.00 D 2010-04-25 2017-04-24 Common Stock 10000 0 D Stock Option 85.82 2011-04-30 2018-04-29 Common Stock 11000 11000 D Stock Option 81.49 2012-04-29 2019-04-28 Common Stock 21000 21000 D Stock Option 108.15 2013-04-28 2020-04-27 Common Stock 19500 19500 D Stock Option 149.02 2014-04-27 2021-04-26 Common Stock 14990 14990 D Stock Option 204.01 2015-04-25 2022-04-24 Common Stock 11716 11716 D Stock Option 245.86 2016-04-24 2023-04-23 Common Stock 11543 11543 D Stock Option 248.22 2017-04-30 2024-04-29 Common Stock 7360 7360 D Stock Option 231.88 2018-04-01 2025-03-31 Common Stock 9728 9728 D Transaction pursuant to a previously adopted Rule 10b5-1 trading program. This is the first of two Forms 4 to report all December 1, 2015 transactions for the reporting person. Exhibit List - Exhibit 24 - Power of Attorney Hugo Dubovoy, Jr., as attorney-in-fact 2015-12-03