X0306 4 2013-02-26 0001097864 ON SEMICONDUCTOR CORP ONNN 0001558921 GUTMANN BERNARD 5005 EAST MCDOWELL ROAD PHOENIX AZ 85008 1 Exec VP & CFO Common 2013-02-26 4 A 0 2000.0000 7.9500 A 100552.0000 D Common 2013-02-26 4 F 0 738.0000 7.9500 D 99814.0000 D This transaction reports the acquisition, effective February 26, 2013, of 2,000 shares of common stock resulting from the attainment of a performance goal under an earlier Performance Based Restricted Stock Units Award, as described more below. The Compensation Committee of the issuer originally awarded 12,000 Performance Based Restricted Stock Units to the Reporting Person with an effective grant date of February 16, 2010 subject to the Issuer's 2000 Stock Incentive Plan and a related award agreement ("2010 PBRSU Award"). The 2010 PBRSU Award vested generally over a three-year period, but only upon the Issuer achieving certain revenue and adjusted non-GAAP earnings before interest, taxes, depreciation and amortization ("EBITDA") minimum or maximum performance measurements as set forth in the 2010 PBRSU Award agreement. This disposition transaction represents shares withheld by the Issuer pursuant to the Reporting Person's 2010 PBRSU Award and related award agreements. On February 26, 2013, certain of these units vested. These 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. Judith A. Boyle is signing on behalf of the Reporting Person pursuant to a Power of Attorney attached hereto as an Exhibit. gutmann2012poa.txt /s/ Judith A. Boyle, Attorney-in-Fact 2013-02-28