X0303 4 2010-11-22 0001084755 ARIBA INC ARBA 0001342273 Parker Kent ARIBA, INC. 807 11TH AVENUE SUNNYVALE CA 94089 0 1 0 0 Chief Operating Officer Common Stock 2010-11-22 4 F 0 69910 20.80 D 239230 D Common Stock 2833 I Through 401(k) Plan Reflects shares withheld or surrendered to the Issuer to satisfy income and employment tax withholding obligations in accordance with Rule 16b-3 upon settlement/vesting of awards covering an aggregate of 204,994 shares, specifically with respect to the following awards: 11,999 shares acquired pursuant to a restricted stock award (the acquisition of which shares were reported on a Form 4 for October 15, 2007, the "2008 RS Award"); 49,994 shares acquired pursuant to a fiscal year 2008 Performance Stock Unit (the acquisition of which shares were reported on a Form 4 for October 23, 2008, the "2008 PSU"); and 143,001 shares acquired pursuant to a fiscal year 2009 Performance Stock Unit (the acquisition of which shares were reported on a Form 4 for October 28, 2010, the "2009 PSU"). The end of period holdings for the reporting person's directly-owned shares reflects an adjustment from the number reported on the last-filed Form 4 because the end of period holdings reported in the prior Form 4 inadvertently included the 2,833 shares indirectly held by the reporting person through his 401(k) plan account (these shares are reported as indirectly owned in the table above) and did not include an aggregate of 61,993 shares that represent the sum of 11,999 shares related to the 2008 RS Award and 49,994 shares related to the 2008 PSU, each of which have been previously reported as described in Footnote 1. Kent Parker 2010-11-24