X0303 4 2009-12-16 0 0000709804 ADAPTEC INC ADPT 0001314205 Dotz Mary 691 SOUTH MILPITAS BLVD. MILPITAS CA 95035 0 1 0 0 Chief Financial Officer Common Stock 2009-12-16 4 F 0 4584 3.29 D 37082 D Common Stock 2009-12-16 4 F 0 2292 3.29 D 34790 D Represents shares that were automatically withheld to cover tax withholding obligations. On December 16, 2009, the Company accelerated 25% of the total restricted stock award granted on March 31, 2008 (as reported on Form 4 filed on April 2, 2008), not to exceed the unvested options as of November 6, 2009, as per the provisions of the 2004 Equity Incentive Plan. Represents shares that were automatically withheld to cover tax withholding obligations. On December 16, 2009, the Company accelerated 25% of the total restricted stock award granted on August 4, 2008 (as reported on Form 4 filed on August 6, 2008), not to exceed the unvested options as of November 6, 2009, as per the provisions of the 2004 Equity Incentive Plan. - On December 16, 2009, the Company accelerated 25% of the total stock options granted on March 31, 2008 (as reported on Form 4 filed on April 2, 2008), not to exceed the unvested options as of November 6, 2009, as per the provisions of the 2004 Equity Incentive Plan. - On December 16, 2009, the Company accelerated 25% of the total stock options granted on August 4, 2008 (as reported on Form 4 filed on August 6, 2008), not to exceed the unvested options as of November 6, 2009, as per the provisions of the 2004 Equity Incentive Plan. /s/ Mary Dotz 2009-12-18