X0303 4 2010-06-07 0000075362 PACCAR INC PCAR 0001384380 BARKLEY MICHAEL T 777 106TH AVENUE NE BELLEVUE WA 98004 0 1 0 0 VICE PRESIDENT/CONTROLLER COMMON STOCK (ESPP) 5.85 D COMMON STOCK (SIP) 13534.518 D COMMON STOCK 1988 D STOCK OPTION 32.23 2009-01-01 2016-01-26 COMMON STOCK 5971 5971 D STOCK OPTION 44.56 2010-01-01 2017-01-31 COMMON STOCK 8925 8925 D STOCK OPTION 45.74 2011-01-01 2018-01-30 COMMON STOCK 8332 8332 D STOCK OPTION 30.81 2012-01-01 2019-01-31 COMMON STOCK 13892 13892 D STOCK OPTION 36.12 2013-01-01 2020-02-02 COMMON STOCK 12354 12354 D COMMON STOCK (DCP) 2010-06-07 4 J 0 1.01 38.86 A COMMON STOCK 438.01 439.02 D Shares held in PACCAR Inc Employee Stock Purchase Plan (ESPP). Shares held in PACCAR Savings Investment Plan (SIP). Option to buy awarded under PACCAR Long Term Incentive Plan (LTIP). Share units held in deferred phantom stock account under PACCAR Deferred Incentive Compensation Plan (DCP) convertible to common stock on a one-for-one basis upon satisfaction of all applicable vesting conditions. Dividend on share units held in deferred phantom stock account under DCP reinvested pursuant to DCP. Michael T. Barkley 2010-06-09