Exhibit 99.1

ASML share buy-back program

Repurchase up to € 1.130 billion within 2 years

In 2011, ASML has purchased 25.7 million shares for a total amount of EUR 700 million as part of its intention to purchase up to EUR 1 billion of its own shares within 2 years. In January 2012 ASML announced to increase the size of the current share buy back program to EUR 1,130 million to make use of the maximum room available in 2012 for dividend withholding tax-exempt share buy backs.

The aggregate amount of shares repurchased up to and including March 30, 2012 represents 77.1% of the program.

ASML intends to cancel all shares repurchased under this program.

The total amount of outstanding shares at the end of 2011 was approx. 414 million shares.

The following table shows the shares repurchased between March 5, 2012 and March 30, 2012:

Date	Repurchased shares		Average price		Repurchased value
Mar. 5 - Mar. 9, 2012		211,300	€	33.98	€	7,180,233
Mar. 12 - Mar. 16, 2012		83,936	€	36.42	€	3,057,208
Mar. 19 - Mar. 23, 2012		512,879	€	36.28	€	18,605,629
Mar. 26- Mar. 30, 2012		96,611	€	37.10	€	3,583,799
Total shares repurchase between March 5, 2012 and March 30, 2012		904,726	€	35.84	€	32,426,869
Total shares repurchased through March 30, 2012		30,686,801	€	28.40	€	871,606,104