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
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(Print or Type Responses)
1. Name and Address of Reporting Person *
NOBLE WILLIAM B
  2. Issuer Name and Ticker or Trading Symbol
WD 40 CO [WDFC]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Managing Director, Europe
(Last)
(First)
(Middle)
BRICK CLOSE, KIIN FARM
3. Date of Earliest Transaction (Month/Day/Year)
07/27/2010
(Street)

MILTON KEYNES, X0 MK1 13LJ
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 07/27/2010(1)   M(1)   3,000 A $ 27.27 16,989 D  
Common Stock 07/27/2010(1)   S(1)   3,000 D $ 37.06 13,989 (2) D  

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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
Non-qualified Stock Option $ 27.27 07/27/2010(1)   M(1)     3,000 10/18/2008 10/18/2015 Common Stock 3,000 (3) 6,000 (4) D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
NOBLE WILLIAM B
BRICK CLOSE
KIIN FARM
MILTON KEYNES, X0 MK1 13LJ
      Managing Director, Europe  

Signatures

 Maria M. Mitchell as attorney-in-fact for William B. Noble   07/29/2010
**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) Transaction pusuant to trading plan adopted pursuant to Rule 10b5-1 under Securities Exchange Act of 1934.
(2) Total includes 9,036 Restricted Stock Units and 2,400 Performance Share Units.
(3) Not applicable.
(4) In addition to the reported options, the reporting person holds options to acquire 45,200 common shares as follows: 5,200 non-qualified stock options (NQSO) exercisable 10/19/07 at $27.67 exp. 10/19/14; 10,000 NQSO exercisable 09/23/06 at $29.30 exp. 09/24/13; 10,000 NQSO exercisable 10/17/09 at $35.99 exp. 10/17/16; and 20,000 NQSO (6,800 exercisable 10/16/08, 6,600 exercisable 10/16/09, 6,600 exercisable 10/16/10) at $36.03 exp. 10/16/17.

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