X0303 4 2009-05-19 0 0001130258 ACME PACKET INC APKT 0001377467 BOWEN GARY J C/O ACME PACKET, INC. 71 THIRD AVENUE BURLINGTON MA 01803 1 0 0 0 Stock Option (right to buy) 7.89 2009-05-19 4 A 0 12500 0 A 2019-05-19 Common Stock 12500 12500 D The stock option shall become exercisable in a series of four quarterly installments, with the first quarterly installment becoming exercisable on the first day of the first calendar quarter after May 19, 2009, and each additional quarterly installment becoming exercisable on the first day of each calendar quarter thereafter. /s/ Tim Demakis, as attorney-in-fact 2009-05-21