X0202 4 2008-01-11 0000075362 PACCAR INC PCAR 0001185321 ANDERSON DAVID C 777 106TH AVENUE NE BELLEVUE WA 98004 0 1 0 0 Vice President/General Counsel COMMON STOCK (SIP) 2008-01-11 4 J 0 .008 52.93 A 652.028 D COMMON STOCK (SIP) 2008-01-11 4 J 0 .008 47.47 A 652.036 D COMMON STOCK (SIP) 2008-01-11 4 J 0 2.161 54.32 A 654.197 D COMMON STOCK (SIP) 2008-01-11 4 J 0 .006 51.95 A 654.203 D COMMON STOCK (SIP) 2008-01-11 4 J 0 12.775 51.21 A 666.978 D COMMON STOCK (SIP) 2008-01-11 4 A 0 226.709 49.62 A 893.687 D STOCK OPTION 32.11 2008-01-01 2015-01-20 COMMON STOCK 8491 8491 D STOCK OPTION 32.23 2009-01-01 2016-01-26 COMMON STOCK 8676 8676 D STOCK OPTION 44.56 2010-01-01 2017-01-31 COMMON STOCK 8061 8061 D On September 11, 2007 PACCAR declared a stock dividend of one additional share of common stock for every two shares of common stock payable October 9, 2007 to all holders of record of common stock on September 25, 2007. As a result of the stock dividend the reporting person received 217.34 additional shares of PACCAR common stock. Interest on funds held in SIP pending investment in shares reinvested in shares October 17, 2007. (SIP information based on most recent report from SIP trustee - received January 11, 2008). Interest on funds held in SIP pending investment in shares reinvested in shares November 16, 2007. (SIP information based on most recent report from SIP trustee - received January 11, 2008). December 5, 2007 dividend on PACCAR Savings Investment Plan (SIP) shares reinvested pursuant to SIP. (SIP information based on most recent report from SIP trustee - received January 11, 2008). Interest on funds held in SIP pending investment in shares reinvested in shares December 18, 2007. (SIP information based on most recent report from SIP trustee - received January 11, 2008). January 7, 2008 dividend on SIP shares reinvested pursuant to SIP. (SIP information based on most recent report from SIP trustee - received January 11, 2008). Shares awarded January 10, 2008 under SIP. (SIP information based on most recent report from SIP trustee - received January 11, 2008). Option to buy awarded under PACCAR Long Term Incentive Plan (LTIP). Number of derivative securities, underlying securities and price adjusted to reflect 50% stock dividend. Reporting person received $12.46 for a fractional share valued as of October 9, 2007. Number of derivative securities, underlying securities and price adjusted to reflect 50% stock dividend. David C. Anderson 2008-01-11