ASM International will release first quarter 2001 operating results on

Monday, April 23, 2001

At approximately
17:00 Continental Europe time
11:00 a.m. US Eastern time
8:00 a.m. US West Coast time


ASM International will host an investor conference call on

Tuesday, April 24, 2001

At
16:00 Continental Europe time
10:00 a.m. US Eastern time
7:00 a.m. US West Coast time

The teleconference dial-in numbers are:

United States: (888) 942-8165
International: (712) 257-0414

Password: ASMI
Host Name: Mary Jo Dieckhaus

The teleconference will be available for digitized replay immediately after the conference call until 11:59 p.m. (US Eastern time) on Thursday, April 26, 2001.

For replay, dial:

United States: (888) 568-0917
International: (402) 998-1593

About ASM

ASM International N.V. is headquartered in Bilthoven, the Netherlands. ASM International is a global company, serving one of the most important and demanding industries in the world. The Company possesses a strong technological base, state-of-the-art manufacturing facilities, a competent and qualified workforce and a highly trained, strategically distributed support network. ASM International’s subsidiaries design and manufacture equipment and materials used to produce semiconductor devices. ASM International and its subsidiaries provide production solutions for wafer processing, assembly and packaging through their facilities in the United States, Europe, Japan and Asia. ASM International’s common stock shares trade on Nasdaq (symbol ASMI) and the Euronext Stock Exchange in Amsterdam (symbol ASM). For more information, visit ASM’s web site at http://www.asm.com

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Safe Harbor Statement under the US Private Securities Litigation Reform Act of 1995: The statements regarding orders, earnings development and the effects of research and new products on ASM’s future, and other matters discussed in this statement, except for any historical data, are forward-looking statements. Forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from those in the forward-looking statements. These include, but are not limited to economic conditions in the semiconductor industry, currency fluctuations, the timing of significant orders, market acceptance of new products, competitive factors, risk factors related to litigation and other risks indicated in filings from time to time with the SEC and Stock Exchange Authorities.