X0202 4 2005-08-06 0001101302 ENTEGRIS INC ENTG 0001198621 BRADLEY MICHAEL A 8 BARNSTABLE ROAD WEST NEWTON MA 02465 1 0 0 0 Common Stock 2005-08-06 4 A 0 695 A 695 D Non-employee Director Stock Option (right to buy) 9.40 2005-08-06 4 A 0 11120 A 2015-04-25 Common Stock 11120 11120 D Non-employee Director Stock Option (right to buy) 10.68 2005-08-06 4 A 0 13900 A 2014-04-28 Common Stock 13900 13900 D Non-employee Director Stock Option (right to buy) 5.66 2005-08-06 4 A 0 13900 A 2013-04-24 Common Stock 13900 13900 D Non-employee Director Stock Option (right to buy) 10.91 2005-08-06 4 A 0 6950 A 2012-04-26 Common Stock 6950 6950 D Non-employee Director Stock Option (right to buy) 10.79 2005-08-06 4 A 0 13900 A 2011-08-09 Common Stock 13900 13900 D Received in exchange for 500 shares of Mykrolis Corporation common stock in connection with the merger of Mykrolis Corporation into Eagle DE, Inc. pursuant to Agreement and Plan of Merger, dated March 21, 2005 (the "Merger"); pursuant to the Merger Eagle DE, Inc. changed its name to Entegris, Inc. This option vests in three (3) equal annual installments beginning 4/25/2006. Received in the Merger in exchange for a non-employee director stock option to acquire 8,000 shares of Mykrolis Corporation at a price of $13.07 per share. This option vests in three (3) equal annual installments beginning 4/28/2005. Received in the Merger in exchange for a non-employee director stock option to acquire 10,000 shares of Mykrolis Corporation at a price of $14.85 per share. This option vests in three (3) equal annual installments beginning 4/24/2004. Received in the Merger in exchange for a non-employee director stock option to acquire 10,000 shares of Mykrolis Corporation at a price of $7.87 per share. This option vests in three (3) equal annual installments beginning 4/26/2003. Received in the Merger in exchange for a non-employee director stock option to acquire 5,000 shares of Mykrolis Corporation at a price of $15.16 per share. This option is fully vested. Received in the Merger in exchange for a non-employee director stock option to acquire 10,000 shares of Mykrolis Corporation at a price of $15.00 per share. /s/ Peter W. Walcott, attorney-in-fact for Michael A. Bradley 2005-08-08