X0306 4 2013-07-06 0001097864 ON SEMICONDUCTOR CORP ONNN 0001565015 RASHID MAMOON 5005 EAST MCDOWELL ROAD PHOENIX AZ 85008 1 SVP & GM of SANYO Semi Common 2013-07-06 4 D 0 552.0000 8.3800 D 108234.0000 D This disposition transaction represents shares withheld by the Issuer in connection with the July 6, 2010 restricted stock unit award to the Reporting Person under the Issuer's Amended and Restated Stock Incentive Plan. On July 6, 2013, certain of these units vested. The shares were withheld to satisfy the Reporting Person's withholding obligations for various taxes and similar items. The Issuer will pay these taxes on behalf of the Reporting Person. Includes an aggregate of 1,000 shares acquired by the Reporting Person under the Issuer's Employee Stock Purchase Plan for the quarters ended March 31, 2013 and June 30, 2013. George H. Cave is signing on behalf of the Reporting Person pursuant to a Power of Attorney attached herein as an exhibit rashid2013poa.txt George H. Cave, as Attorney-in-Fact 2013-07-09