Exhibit 99.1

ASML share buy back
program

Repurchase up to € 1 billion within 2 years

Announced January 19, 2011

Repurchased of total program:             62.2%

The total amount of outstanding shares at the end of 2010 is approximately 436 Million shares.

The following table shows the shares repurchased between October 3, 2011 and October 28, 2011:

Date	Repurchased shares		Average price		Repurchased value
Oct. 3 – Oct. 7, 2011		538,585	€	25.68	€	13,828,237
Oct. 10 – Oct. 14, 2011		219,646	€	27.53	€	6,047,140
Oct. 17 – Oct. 21, 2011		339,879	€	28.62	€	9,728,069
Oct. 24 – Oct. 28, 2011		317,536	€	29.30	€	9,302,587
Total shares repurchase between October 3, 2011 and October 28, 2011		1,415,646	€	27.78	€	38,906,033
Total shares repurchased since October 28, 2011		23,029,521	€	27.00	€	621,758,581