X0303 4 2010-01-04 0 0000709804 ADAPTEC INC ADPT 0001328364 Sundaresh Subramanian 691 S. MILPITAS BLVD. MILPITAS CA 95035 0 1 0 0 President & CEO Common Stock 2010-01-04 4 F 0 20499 3.45 D 268345 D Represents shares that were automatically withheld to cover tax withholding obligations. On January 4, 2010, the Company accelerated 100% of the total stock awards granted on August 4, 2008 (as reported on Form 4 filed on August 6, 2008), as per the Separation Agreement between the Company and Mr. Sundaresh. - On January 4, 2010, the Company accelerated 100% of the total stock options granted on May 23, 2005 (as reported on Form 4 filed on May 25, 2005), as per the Separation Agreement between the Company and Mr. Sundaresh. - On January 4, 2010, the Company accelerated 100% of the total stock options granted on August 4, 2008 (as reported on Form 4 filed on August 6, 2008), as per the Separation Agreement between the Company and Mr. Sundaresh. -On January 4, 2010, the Company accelerated 100% of the total stock options granted on August 3, 2009 (as reported on Form 4 filed on August 5, 2009), as per the Separation Agreement between the Company and Mr. Sundaresh. /s/ Subramanian Sundaresh 2010-01-06