Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
GANTZ WILBUR H
  2. Issuer Name and Ticker or Trading Symbol
GRAINGER W W INC [GWW]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
100 GRAINGER PARKWAY
3. Date of Earliest Transaction (Month/Day/Year)
03/20/2007
(Street)

LAKE FOREST, IL 60045-5201
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 03/20/2007   M   2,200 A $ 37.25 13,540 D  
Common Stock 03/20/2007   S   400 D $ 76.12 13,140 D  
Common Stock 03/20/2007   S   600 D $ 76.13 12,540 D  
Common Stock 03/20/2007   S   200 D $ 76.14 12,340 D  
Common Stock 03/20/2007   S   800 D $ 76.15 11,540 D  
Common Stock 03/20/2007   S   200 D $ 76.18 11,340 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Units (1)               (2)   (2) Common Stock 55   14,778 D  
Stock Option $ 37.25 03/20/2007   M     2,200 04/30/2000 04/29/2007 Common Stock 2,200 $ 0 0 D  
Stock Option $ 51.6875             04/29/2001 04/28/2008 Common Stock 1,460   1,460 D  
Stock Option $ 48.625             04/28/1999 04/27/2009 Common Stock 1,860   1,860 D  
Stock Option $ 43.5             04/26/2000 04/25/2010 Common Stock 2,070   2,070 D  
Stock Option $ 37.5             04/25/2001 04/24/2011 Common Stock 2,400   2,400 D  
Stock Option $ 54.61             04/24/2002 04/23/2012 Common Stock 1,650   1,650 D  
Stock Option $ 45.5             04/30/2003 04/29/2013 Common Stock 1,980   1,980 D  
Stock Option $ 54.14             04/28/2004 04/27/2014 Common Stock 1,670   1,670 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
GANTZ WILBUR H
100 GRAINGER PARKWAY
LAKE FOREST, IL 60045-5201
  X      

Signatures

 L. M. Trusdell, as attorney-in-fact   03/21/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) 1-for-1
(2) The stock units are expected to settle in cash following termination of service as a director.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.