X0306 4 2013-05-10 0 0000105132 WD 40 CO WDFC 0001253564 NOBLE WILLIAM B BRICK CLOSE KIIN FARM MILTON KEYNES X0 MK1 13LJ UNITED KINGDOM 0 1 0 0 Managing Director, Europe Common Stock 2013-05-10 4 M 0 2352 35.99 A 18603 D Common Stock 2013-05-10 4 S 0 2352 55.95 D 16251 D Non-qualified Stock Option 35.99 2013-05-10 4 M 0 2352 D 2009-10-17 2016-10-17 Common Stock 2352 5000 D Transaction pusuant to trading plan adopted pursuant to Rule 10b5-1 under Securities Exchange Act of 1934. Total includes 6,244 Restricted Stock Units, of which 2,273 are subject to future vesting, 1,432 Performance Share Units, all of which are subject to future vesting, and 1,115 Market Share Units, all of which are subject to future vesting. Not applicable. In addition to the reported options, the reporting person holds non-qualified stock options to acquire 20,000 shares exercisable 10/16/10 at $36.03 expiring 10/16/17. Maria M. Mitchell as attorney-in-fact for William B. Noble 2013-05-13