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 *
IRWIN MICHAEL J
   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)
Executive Vice President
(Last)
(First)
(Middle)
1061 CUDAHY PLACE		 3. Date of Earliest Transaction (Month/Day/Year)
11/09/2010
(Street)

SAN DIEGO, CA 92110		 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 10/21/2010(1)   M(1)   7,300 A $ 27.27 29,206 D  
Common Stock 11/09/2010(1)   S(1)   7,300 D $ 39.71 21,906 D  
Common Stock 11/09/2010(1)   M(1)   3,219 A $ 20.75 25,125 D  
Common Stock 11/09/2010(1)   S(1)   3,219 D $ 39.57 21,906 D  
Common Stock 11/09/2010(1)   M(1)   10,000 A $ 35.99 31,906 D  
Common Stock 11/09/2010(1)   S(1)   10,000 D $ 39.71 21,906 D  
Common Stock 11/09/2010(1)   M(1)   17,600 A $ 36.03 39,506 D  
Common Stock 11/09/2010(1)   S(1)   17,600 D $ 39.71 21,906 D  
Common Stock 11/09/2010(1)   M(1)   5,181 A $ 20.75 27,087 D  
Common Stock 11/09/2010(1)   S(1)   5,181 D $ 39.57 21,906 D  
Common Stock 11/09/2010(1)   M(1)   10,000 A $ 27.56 31,906 D  
Common Stock 11/09/2010(1)   S(1)   10,000 D $ 39.57 21,906 D  
Common Stock 11/09/2010(1)   M(1)   10,000 A $ 29.3 31,906 D  
Common Stock 11/09/2010(1)   S(1)   10,000 D $ 39.57 21,906 D  
Common Stock 11/09/2010(1)   M(1)   9,000 A $ 27.67 30,906 D  
Common Stock 11/09/2010(1)   S(1)   9,000 D $ 39.57 21,906 (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 11/09/2010(1)   M(1)     7,300 10/18/2008 10/18/2015 Common Stock 7,300 (3) 0 D  
Incentive Stock Option $ 20.75 11/09/2010(1)   M(1)     3,219 09/25/2004 09/25/2011 Common Stock 3,219 (3) 0 D  
Non-qualified Stock Option $ 35.99 11/09/2010(1)   M(1)     10,000 10/17/2009 10/17/2016 Common Stock 10,000 (3) 0 D  
Non-qualified Stock Option $ 36.03 11/09/2010(1)   M(1)     17,600 10/16/2010 10/16/2017 Common Stock 17,600 (3) 0 D  
Non-qualified Stock Option $ 20.75 11/09/2010(1)   M(1)     5,181 09/25/2004 09/25/2011 Common Stock 5,181 (3) 0 D  
Non-qualified Stock Option $ 27.56 11/09/2010(1)   M(1)     10,000 09/24/2005 09/24/2012 Common Stock 10,000 (3) 0 D  
Non-qualified Stock Option $ 29.3 11/09/2010(1)   M(1)     10,000 09/23/2006 09/23/2013 Common Stock 10,000 (3) 0 D  
Non-qualified Stock Option $ 27.67 11/09/2010(1)   M(1)     9,000 10/19/2007 10/19/2014 Common Stock 9,000 (3) 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
IRWIN MICHAEL J
1061 CUDAHY PLACE
SAN DIEGO, CA 92110		       Executive Vice President  

Signatures

 Maria M. Mitchell, as attorney-in-fact for Michael J. Irwin   11/11/2010
**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 pursuant to trading plan adopted pursuant to Rule 10b5-1 under Securities Exchange Act of 1934.
(2) Total includes 760 shares held in WD-40 Company Profit Sharing Plan (Company Stock Fund) account - estimated number of shares based upon equivalent value of units held. Total also includes 8,359 Restricted Stock Units, 5,711 of which are subject to future vesting, and 4,800 Performance Share Units, 2,400 of which are subject to future vesting.
(3) not applicable

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