Exhibit 21

Wholly Owned Subsidiaries and Joint Ventures

Wholly Owned Subsidiaries

Donaldson Australasia Pty. Ltd.
Wyong, Australia Donaldson Filtration Österreich, GmbH
Vienna, Austria Donaldson Europe, b.v.b.a.
Donaldson Coordination Center, b.v.b.a.
Donaldson Belgie, b.v.b.a.
Leuven, Belgium Donaldson do Brasil Equipamentos Industriais Ltda
Atibaia, São Paulo, Brazil Donaldson Canada, Inc.
Athens, Ontario, Canada Donaldson Far East Ltd.
Hong Kong, S.A.R., China Donaldson (Wuxi) Filters Co., Ltd.
Wuxi, China Donaldson Czech Republic s.r.o.
Klasterec nad Ohri, Czech Republic Donaldson Industrial CR - Konzern s.r.o.
Kadan, Czech Republic Donaldson Filtration CR - Konzern s.r.o.
Prague, Czech Republic Donaldson Scandinavia a.p.s.
Hørsholm, Denmark Donaldson, s.a.s.
Domjean, France Donaldson France, s.a.s. Financiere de Segur s.a.s.
Le Bozec Filtration et Systèmes, s.a.s.
Paris, France Ultrafilter s.a.s.
Vigny, France Donaldson GmbH
Torit DCE GmbH
Dülmen, Germany Donaldson Filtration Deutschland GmbH
Haan, Germany Ultratroc GmbH
Flensburg, Germany Donaldson Filtration Magyarorszag Kft.
Budapest, Hungary Donaldson India Filter Systems Pvt. Ltd.
New Delhi, India P.T. Donaldson Systems Indonesia
P.T. Donaldson Filtration Indonesia
Jakarta, Indonesia Donaldson Italia s.r.l.
Ostiglia, Italy Nippon Donaldson Ltd.
Tachikawa, Tokyo, Japan Donaldson Luxembourg S.a.r.l
Luxembourg City, Luxembourg Donaldson Filtration (Malaysia) Sdn. Bnd.
Selangor Darul Ehsan, Malaysia Donaldson, S.A. de C.V.
Prestadora de Servicios Aguascalientes, S. de R.L. de C.V.
Aguascalientes, Mexico Donaldson Torit, B.V.
Donaldson Nederland B.V.
Almere, Netherlands Donaldson Filtration Norway a.s.
Moss, Norway Donaldson Filtration (Philippines) Inc.
Muntinlupa, Philippines

Donaldson Polska Sp. z.o.o.
Warsaw, Poland Donaldson Filtration (Asia Pacific) Pte. Ltd.
Changi, Singapore Donaldson Filtration Slovensko s.r.o.
Bratislava, Slovakia Donaldson Filtration Systems (Pty) Ltd.
Cape Town, South Africa Donaldson Korea Co., Ltd. Seoul, South Korea Donaldson Ibèrica Soluciones en Filtración, S.L. Barcelona, Spain Ultrafilter S.L.
Terrassa, Spain Donaldson Schweiz GmbH
Aarau, Switzerland Donaldson Taiwan Ltd.
Taipei, Taiwan Donaldson Filtration (Thailand) Ltd.
Nonthaburi, Thailand Donaldson (Thailand) Ltd.
Rayong, Thailand Donaldson Filtre Sistemleri
Ticaret Limited Sirketi
Istanbul, Turkey Donaldson Filter Components Ltd.
Donaldson UK Holding Ltd.
Hull, United Kingdom Donaldson Filtration (GB) Ltd. Leicester, United Kingdom Donaldson Capital, Inc.
ASHC, Inc.
Minneapolis, MN USA Aerospace Filtration Systems, Inc. St. Charles, MO USA

Joint Ventures

Advanced Filtration Systems, Inc.

Advanced Filtration Services, Inc.

Champaign, Illinois

AFSI Europe s.r.o.

Most, Czech Republic

Ultrafilter (India) Pvt. Ltd.

Bangalore, India

P.T. Panata Jaya Mandiri

Jakarta, Indonesia

Rashed Al-Rashed & Sons - Donaldson Company Ltd.

Dammam, Saudi Arabia