Exhibit 21 SUBSIDIARIES OF THE REGISTRANT State or Country of Names Under Which Company Name(a) Incorporation or Subsidiaries Do Business ------- ------------- --------------------------- PACCAR of Canada Ltd. Canada PACCAR of Canada Ltd. Canadian Kenworth Co. Peterbilt of Canada PACCAR Parts of Canada PACCAR Australia Pty. Ltd. Australia PACCAR Australia Pty. Ltd. Kenworth Trucks DAF Trucks PACCAR Financial Pty. Ltd. Australia PACCAR Financial Pty. Ltd. PACCAR U.K. Ltd. Delaware PACCAR U.K. Ltd. Foden Trucks PACCAR Mexico, S.A. de C.V. Mexico PACCAR Mexico, S.A. de C.V. KENFABRICA, S.A. de C.V. KENCOM, S.A. de C.V. Kenworth Mexicana S.A. de C.V. PACCAR Parts Mexico S.A. de C.V. PACCAR Capital Mexico S.A. de C.V. Paclease Mexicana S.A. de C.V. PACCAR Financial Corp. Washington PACCAR Financial Corp. PACCAR Financial Services Ltd. Canada PACCAR Financial Services Ltd. PACCAR Leasing Corporation Delaware PACCAR Leasing Corporation PacLease PACCAR Sales North America, Inc. Delaware PACCAR Sales North America PACCAR Holding B.V.(b) Netherlands PACCAR Holding B.V. DAF Trucks, N.V.(c) Netherlands DAF Trucks, N.V. Leyland DAF DAF Trucks Vlaanderen N.V.(d) Belgium DAF Trucks Vlaanderen N.V. Leyland DAF Trucks Ltd.(d) United Kingdom Leyland DAF Trucks Ltd. Leyland Trucks Limited(e) England Leyland Trucks Limited and Wales (a) The names of some subsidiaries have been omitted. Considered in the aggregate, omitted subsidiaries would not constitute a significant subsidiary. (b) A wholly owned subsidiary of PACCAR Sales North America, Inc. (c) A wholly owned subsidiary of PACCAR Holding B.V. (d) A wholly owned subsidiary of DAF Trucks, N.V. (e) A subsidiary of Kepacourt Limited, an England and Wales corporation which is a subsidiary of PACCAR Trucks U.K. Ltd., an England and Wales corporation which is a subsidiary of PACCAR Holding B.V.