X0303 4 2010-10-28 0001084755 ARIBA INC ARBA 0001440658 Rubaie Ahmed C/O ARIBA, INC. 807 11TH AVENUE SUNNYVALE CA 94089 0 1 0 0 Chief Financial Officer Common Stock 2010-10-28 4 A 0 97500 0 A 108185 D Common Stock 2010-10-28 4 A 0 104146 0 A 212422 D This transaction reflects with respect to the number of shares reported achievement of the fiscal year 2010 performance goals applicable to the reporting person's fiscal year 2010 Performance Stock Unit award. Service-based vesting conditions continue to apply to this award. This transaction reflects with respect to the number of shares reported achievement of the fiscal year 2010 performance goals applicable to the reporting person's fiscal year 2009 Performance Stock Unit award. Service-based vesting conditions continue to apply to this award. Balance includes 91 shares acquired by Mr. Rubaie on 10/1/2010 through participation in Ariba's 401K Retirement program. Ahmed Rubaie 2010-11-01