X0306 4 2015-04-29 0 0000277135 GRAINGER W W INC GWW 0001194175 SLAVIK JAMES D 100 GRAINGER PARKWAY LAKE FOREST IL 60045 1 0 0 0 Common Stock 828194 D Common Stock 68847 I See Footnote Common Stock 1039490 I See Footnote Common Stock 1635760 I See Footnote Common Stock 87306 I See Footnote Common Stock 255686 I See Footnote Stock Units 2015-04-29 4 A 0 590 249.19 A Common Stock 590 17679 D Shares held by trusts of which Mr. Slavik is a beneficiary and trustee or co-trustee. Shares held by or FBO Mr. Slavik's children. Mr. Slavik disclaims beneficial ownership of such shares. Shares held by corporation of which Mr. Slavik is a shareholder, director & officer. Mr. Slavik disclaims beneficial ownership of such shares. Shares held by trusts of which Mr. Slavik is a trustee or co-trustee. Mr. Slavik disclaims beneficial ownership of such shares. Shares owned by Emerald Bay Ventures II, LLC, of which Mr. Slavik is the sole manager. Mr. Slavik disclaims beneficial ownership of such shares except to the extent of his pecuniary interest. 1-for-1 The stock units are expected to settle in shares of common stock on a one-for-one basis following termination of service as a director. David L. Rawlinson, as attorney-in-fact 2015-04-30