Press release - Veldhoven, the Netherlands, April 10, 2000

ASM Lithography Holding NV (ASML) today announces the effective date of its 3-for-1 share split. Following the approval of a 3-for-1 share split of ASML's shares, at the Annual General Meeting of Shareholders held on March 23, 2000, ASML would like to announce that the effective date for the share split will be April 17, 2000, and trading of the split shares will commence on that date.

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Monique Mols

Head of Media Relations

Sander Hofman

Senior creative content strategist

Brittney Wolff Zatezalo

Corporate communications manager US

Skip Miller

VP Investor Relations – Worldwide

Marcel Kemp

Director Investor Relations Europe

Peter Cheang

Director Investor Relations Asia