W.W. GRAINGER, INC. — Director's Dealing 2010

May 3, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GRAINGER W W INC (GWW)
CIK: 0000277135
Period of Report: 2010-05-03

Reporting Person: HOBOR NANCY A (Sr VP-Communications & Inv Rel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-03	Common Stock	S	100	$111.6	Disposed	23550	Direct
2010-05-03	Common Stock	S	250	$111.62	Disposed	23300	Direct
2010-05-03	Common Stock	S	300	$111.63	Disposed	23000	Direct
2010-05-03	Common Stock	S	600	$111.64	Disposed	22400	Direct
2010-05-03	Common Stock	S	100	$111.6575	Disposed	22300	Direct
2010-05-03	Common Stock	S	100	$111.69	Disposed	22200	Direct
2010-05-03	Common Stock	S	200	$111.74	Disposed	22000	Direct
2010-05-03	Common Stock	S	100	$111.79	Disposed	21900	Direct
2010-05-03	Common Stock	S	200	$111.81	Disposed	21700	Direct
2010-05-03	Common Stock	S	100	$111.82	Disposed	21600	Direct
2010-05-03	Common Stock	S	50	$111.83	Disposed	21550	Direct
2010-05-03	Common Stock	S	300	$111.86	Disposed	21250	Direct
2010-05-03	Common Stock	S	100	$111.87	Disposed	21150	Direct
2010-05-03	Common Stock	S	500	$111.89	Disposed	20650	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Option	$76.61	2016-04-25	Common Stock (5000)	5000	Direct
Option	$83.08	2017-04-24	Common Stock (6000)	6000	Direct
Option	$85.82	2018-04-29	Common Stock (6000)	6000	Direct
Option	$81.49	2019-04-28	Common Stock (8000)	8000	Direct
Option	$108.15	2020-04-27	Common Stock (7000)	7000	Direct