Exhibit 99.1


ASML Selects Leader Koo as President, Track business

VELDHOVEN, The Netherlands, September 12, 2002 - ASML Holding NV (ASML)
today announced that Leader Koo was appointed president of its Track
business based in San Jose, California, effective August 2002.

Koo formerly served ASML as vice president, sales, Central / Western Region
- North America.

"As the industry moves to 100-nanometers and below, the value-add from ASML
will come from combining our lithography and track solutions," said Stuart
McIntosh, executive vice president, operations and president, lithography
business, ASML. "With 18-years' experience working with both technology and
customers, Leader is uniquely qualified to pilot our Track business into
the future."

"ASML Track is strategically important as it complements the core
lithography business. The company is committed to creating the conditions
for success at ASML Track, " said Leader Koo, president, track business,
ASML. "I am excited to take the helm at this important juncture in the
history of the operation."

Leader Koo joined ASML in 1998 as part of its global account management
team. His responsibilities included expanding the US customer base and
building customer service. Prior to ASML, Koo worked at Texas Instruments'
Systems Group for 14 years in management positions for development programs
and production start-ups. He has a Bachelor of Science degree in mechanical
engineering from the University of Texas.

ASML creates lithography equipment to print circuits on silicon wafers that
become semiconductors or chips. ASML Track provides the systems that apply
and develop photoresist on the surface of the wafer.

About ASML
ASML is one of the world's leading providers of advanced technology systems
for the semiconductor industry. The company offers an integrated portfolio
of lithography, track and thermal systems mainly for manufacturing complex
integrated circuits. Headquartered in Veldhoven, the Netherlands, ASML is
traded on Euronext Amsterdam and NASDAQ under the symbol ASML. In the first
half of 2002, the company reported net sales of EUR 823 million. ASML
employs approximately 6,800 people in 50 locations throughout the world.