X0304 4 2011-12-03 0001316625 Silicon Graphics International Corp SGI 0001436721 Pebworth Timothy Lee C/O SGI 46600 LANDING PARKWAY FREMONT CA 94538 1 VP, Corporate Controller & CAO Common Stock 2011-12-03 4 A 0 625 14.36 A 5542 D Common Stock 2011-12-03 4 F 0 229 14.36 D 5313 D Restricted Stock Units 0 2011-12-03 4 D 0 625 0 D 2011-12-03 Common Stock 625 6875 D Vested and release of an installment of Restricted Stock Units. These shares were retained by the Company in order to meet the tax withholding obligations of the award holder in connection with the vesting of an installment of the restricted stock units. The amount retained by the Company was not in excess of the amount of the tax liability. Restricted Stock Units have no Expiration Date. /s/ Jennifer Pratt as Attorney-in-Fact for Timothy Pebworth 2011-12-07