X0303 4 2011-02-03 0001084755 ARIBA INC ARBA 0001198584 JOHNSON ROBERT D C/O ARIBA, INC. 807 11TH AVENUE SUNNYVALE CA 94089 1 0 0 0 Common Stock 2011-02-03 4 M 0 12500 12.58 A 46481 D Common Stock 2011-02-03 4 S 0 12500 28.34 D 33981 D Common Stock 2011-02-03 4 S 0 8643 28.572 D 25338 D Employee Stock Option (Right to Buy) 12.58 2011-02-03 4 M 0 12500 0 A 2005-01-24 2015-01-24 Common Stock 12500 12500 D Robert Johnson 2011-02-07